ignore stale branch marker

0.9.6.14: Verbindungstyp nicht mehr aus UI-Text erraten

.github/workflows/lint.yml

@@ -0,0 +1,59 @@
+name: Syntax Check
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  syntax:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Repository auschecken
+        uses: actions/checkout@v4
+
+      - name: PHP installieren
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.2'
+          coverage: none
+
+      - name: PHP Syntax pruefen
+        shell: bash
+        run: |
+          set -euo pipefail
+          while IFS= read -r -d '' file; do
+            php -l "$file"
+          done < <(find . -type f -name '*.php' -print0)
+
+      - name: Doppelte Bratonien-Funktionen pruefen
+        shell: bash
+        run: |
+          set -euo pipefail
+          duplicates="$(grep -RhoE 'function[[:space:]]+bratonien_tools_[A-Za-z0-9_]+' --include='*.php' . | awk '{print $2}' | sort | uniq -d || true)"
+          if [[ -n "$duplicates" ]]; then
+            echo "Doppelte globale Bratonien-Funktionen gefunden:" >&2
+            printf '%s\n' "$duplicates" >&2
+            exit 1
+          fi
+
+      - name: Admin JavaScript Syntax pruefen
+        shell: bash
+        run: |
+          set -euo pipefail
+          sed -n '/<script>/,/<\/script>/p' template/admin_tabs.tpl | sed '1d;$d' > /tmp/bratonien-admin-tabs.js
+          node --check /tmp/bratonien-admin-tabs.js
+          node --check js/nc_connector_edit_v2.js
+
+      - name: Python Syntax pruefen
+        shell: bash
+        run: |
+          set -euo pipefail
+          python3 -m compileall -q runtime
+
+      - name: Shell Syntax pruefen
+        shell: bash
+        run: |
+          set -euo pipefail
+          while IFS= read -r -d '' file; do
+            bash -n "$file"
+          done < <(find . -type f -name '*.sh' -print0)

CURRENT_STATUS.md

@@ -1,121 +1,139 @@
 # Aktueller Entwicklungsstand
 
-Stand: 18.08.2026
+Stand: 19.08.2026
 
 ## Plugin
 
-- Aktuelle Plugin-Version: **0.9.4.2**
+- Aktuelle Plugin-Version: **0.9.6.1**
-- Aktueller Entwicklungsblock: **NC Connector – Endnutzer-Assistent und Konsolidierung**
+- Aktueller Entwicklungsblock: **NC Connector – WebDAV-End-to-End-Pfad mit Piwigo-Registrierung, Preview-/Derivatstrecke und sauberem Verbindungs-Lebenszyklus**
-- `0.9.3.43` markiert den abgeschlossenen vorherigen Meilenstein.
+- GitHub ist das führende Repository.
-- `0.9.4.x` ist der neue Entwicklungsblock.
+- Der bestehende lokale Connector bleibt vollständig erhalten und wird nicht automatisch migriert.
 
-## Produktiver Stand
+## Nicht verhandelbare Architekturregeln
 
-Der lokale NC Connector ist im aktuellen Bratonien-Einsatz End-to-End funktionsfähig:
+- Nextcloud bleibt die Quelle der Originalbilder.
+- Originalbilder werden **nicht dauerhaft nach Piwigo kopiert**.
+- Der bestehende lokale Produktionsweg bleibt funktionsfähig.
+- WebDAV benötigt nur Nextcloud-Adresse, Benutzer/App-Passwort und normale WebDAV-Berechtigungen des Benutzers.
+- Kein Nextcloud-PostgreSQL-Zugriff, kein `occ`, keine Storage-IDs, keine Host-Mounts, kein FUSE, davfs oder rclone als Voraussetzung.
+- WebDAV-Verbindungen werden voneinander isoliert verarbeitet.
+- Fehler der WebDAV-Bildverarbeitung dürfen keinen normalen Piwigo-Seitenaufruf zum Absturz bringen.
 
-- Nextcloud-Freigaben `folder` und `file` werden verarbeitet.
+## Bestehende Quellenmodi
-- Ordnerfreigaben werden als physische Piwigo-Alben synchronisiert.
-- Einzeldateifreigaben werden als echte Piwigo-Orphans ohne Albumzuordnung registriert.
-- Entfernte Freigaben werden aus Piwigo entfernt, Originaldateien bleiben erhalten.
-- Neue physische Connector-Alben werden privat angelegt.
-- API-first-Synchronisierung ist produktiv für Piwigo **16.4.0** freigegeben.
-- Piwigo-Album- und Fotoinformationen werden nach dem direkten Sync aktualisiert.
-- Der gemeinsame systemd-Timer verarbeitet aktive Verbindungen regelmäßig.
 
-## 0.9.4.1
+Weiterhin vorhanden:
 
-Die Statusaktualisierung im Admin-UI wurde von Seiten-Reload auf gezielte DOM-Aktualisierung umgestellt. Der Poller aktualisiert nur noch **Letzter Lauf** und **Nächster Lauf**. Offene Dialoge, Details und der Assistent bleiben dadurch erhalten.
+- `legacy-view`
+- `user-shares`
+- `selected-fileids`
 
-## 0.9.4.2
+Neuer WebDAV-Modus:
 
-### Verbindungsassistent
+- `webdav-placeholder`
 
-Der Assistent wurde erneut aus Endnutzersicht konsolidiert:
+Es gibt keine automatische Migration bestehender Verbindungen auf WebDAV.
 
-1. Nextcloud-Adresse + Benutzer + Passwort.
+## WebDAV-Ablauf in 0.9.6.1
-2. Automatischer Web-Scan über HTTP/HTTPS und OCS.
-3. Der Nutzer sieht zunächst keine komplette Datenbank-Technikmaske.
-4. Für den Datenzugriff werden zuerst nur Lese-Benutzer und Passwort abgefragt.
-5. Host = Nextcloud-Host, Port 5432 und Datenbank `nextcloud` werden nur als automatischer Prüfversuch verwendet und nicht als sicher erkannt dargestellt.
-6. Scheitert dieser Versuch, fragt der Assistent gezielt die abweichende Datenbank-Adresse, Port und Datenbank ab.
-7. Storage-Mounts werden nur abgefragt, wenn sie nicht sicher aus vorhandenen Zuordnungen übernommen werden können.
-8. Danach folgen Showcase-Benutzer, Piwigo-API-Test/Skip und Fallback.
-9. Erst der letzte Schritt legt die Verbindung dauerhaft an.
 
-Fehler leeren die Wizard-Eingaben nicht. Geheimnisse bleiben während des Wizards serverseitig in der PHP-Sitzung und werden nicht im Browser-Web-Storage persistiert.
+1. Der Assistent prüft Nextcloud über WebDAV und lässt sichtbare Verzeichnisse auswählen.
-
+2. `runtime/reconcile-webdav.php` erzeugt die verbindungseigene Runtime-Konfiguration.
-### Storage-Mappings
+3. `runtime/lib/build_webdav_placeholder_source.py` liest die ausgewählten Verzeichnisse rekursiv per PROPFIND.
-
+4. Ordner, Dateinamen, Nextcloud-Datei-ID, MIME-Typ, Größe, ETag und WebDAV-Pfad werden erfasst.
-Das Storage-Format erlaubt jetzt einen leeren `source_prefix`. Damit kann ein kompletter Storage direkt auf einen lokalen Mount zeigen. Die frühere Fehlermeldung
+5. Eine lokale Platzhalterquelle wird erzeugt, ohne Originalbilder dauerhaft zu speichern.
-
+6. `runtime/lib/shadow_tree.py` baut daraus den verbindungseigenen Shadow Tree.
-`Storage-Zeilen muessen das Format storage_id | source_prefix | local_mount verwenden.`
+7. Der WebDAV-Galeriebaum liegt unter `_data/bratonien-tools/nc-webdav-gallery/connection-ID` und wird als eigene physische Piwigo-Site registriert.
-
+8. Dadurch erscheint die ausgewählte Nextcloud-Wurzel als normales Piwigo-Album; technische `bratonien-webdav-ID`-Wrapper werden nicht angezeigt.
-tritt bei einem legitimen Root-Mapping nicht mehr auf.
+9. Vorbereitete Arbeitsbilder liegen unter `_data/bratonien-tools/nc-webdav-preview/connection-ID`.
-
+10. Arbeitsbilder werden als JPEG beziehungsweise PNG erzeugt und maximal auf 4096 px Kantenlänge begrenzt, damit Piwigos Bildbibliothek sie zuverlässig verarbeiten kann.
-### Native Aktivierung
+11. Der CLI-Derivat-Builder korrigiert die Piwigo-Bildabmessungen anhand des Arbeitsbilds und erzeugt die aktuell konfigurierten Standard- und Custom-Derivate.
-
+12. Der normale Frontend-Aufruf erzeugt **keine** Derivate. Fehlt ein Derivat, wird das vorbereitete Bild als sicherer Fallback ausgeliefert.
-`nc-connector-install.php` unterstützt jetzt auch API-only-Verbindungen ohne dauerhaft gespeicherten Login-Fallback. Ein Fallback ist nur nötig, wenn keine nutzbare API gespeichert ist.
+13. Originalbilder werden bei echtem Originalabruf serverseitig über `webdav-image.php` aus Nextcloud gestreamt; Nextcloud-Zugangsdaten erscheinen nicht im Browser.
-
-### Dokumentation
-
-README und CURRENT_STATUS wurden auf den aktuellen `0.9.4.x`-Stand gebracht und beschreiben jetzt den realen API-first-Sync, den Wizard, die Statusaktualisierung ohne Reload und die aktuelle Runtime-Architektur.
-
-## Architektur NC Connector
-
-- Nextcloud ist Quelle der Originalbilder.
-- Piwigo erhält einen Shadow Tree aus Verzeichnissen und Symlinks.
-- PostgreSQL-Reader und die Views `piwigo_showcase_sources` / `piwigo_showcase_activity` liefern Quellen und Aktivität.
-- Runtime-Konfigurationen: `/etc/bratonien-tools/nc-connector/connection-*.conf`
-- State: `/var/lib/bratonien-tools/nc-connector/connection-ID`
-- Öffentlicher Admin-Status: Piwigo `_data/bratonien-tools/nc-connector-status/`
-- Runner: `runtime/run-all.sh`
-- Einzelverbindung: `runtime/sync.sh`
 
 ## Piwigo-Synchronisierung
 
-Priorität:
+WebDAV verwendet denselben Piwigo-Synchronisationspfad wie der bestehende Connector, aber mit einer verbindungseigenen physischen Site.
 
-1. gespeicherter Piwigo-API-Key;
+Nach der Dateisynchronisierung laufen die vorhandenen Piwigo-Nacharbeiten, darunter Metadaten-, Integritäts-, Kategorie-, Pfad-, Rang- und Cache-Aktualisierungen sowie der Orphan-Abgleich.
-2. bei nicht nutzbarer API gespeicherter Benutzername/Passwort-Fallback;
-3. ohne beide Wege Abbruch mit Fehlerstatus.
 
-Produktive API-Methoden:
+Die direkte produktive Synchronisierung ist derzeit ausdrücklich auf **Piwigo 16.4.0** abgestimmt.
 
-- `bratonien.nc.syncProductive`
+## WebDAV-Bildausgabe und Derivate
-- `bratonien.nc.syncOrphans`
 
-`bratonien.nc.syncProductive` ist auf Piwigo 16.4.0 versionsgebunden. Der direkte Sync verwendet Bratonien-eigene Logik auf Basis der Piwigo-Core-Funktionen, nicht das Rendern oder Fernsteuern einer Admin-Seite.
+Wichtige Dateien:
 
-## Activity Gate und Shadow Tree
+- `include/webdav_image_runtime.inc.php` – Zuordnung Piwigo-Bild ↔ WebDAV-Quelle, Preview-/Derivat-Helfer und URL-Filter.
+- `webdav-image.php` – berechtigungsgeprüfter serverseitiger Original-/Preview-Abruf.
+- `runtime/lib/precache-webdav-previews.php` – vorbereitete JPEG-/PNG-Arbeitsbilder ohne dauerhafte Originalkopie.
+- `runtime/lib/build-webdav-derivatives.php` – CLI-Aufbau der konfigurierten Piwigo-Derivate.
 
-Das Activity Gate berücksichtigt:
+Der Frontend-Hook führt keine Bildgenerierung mehr aus. Damit bleibt ein Fehler in GD/Imagick/External ImageMagick auf den Hintergrundlauf begrenzt.
 
-- Aktivitätsstand;
+## Löschen einer WebDAV-Verbindung seit 0.9.6.1
-- Share-Fingerprint;
-- Quiet-Time;
-- Max-Wartezeit;
-- periodischen Full-Sync;
-- Reparaturbedarf bei beschädigter lokaler Struktur.
 
-Der Shadow-Tree-Wechsel besitzt einen Rollback auf den vorherigen Baum, falls das Umschalten fehlschlägt.
+Eine gelöschte WebDAV-Verbindung darf keine weiterhin sichtbaren oder über alte Piwigo-Datensätze erreichbaren Bilder hinterlassen.
+
+Beim Löschen über die Oberfläche:
+
+- werden die zur Verbindung gehörende Piwigo-Site, ihre Alben und Bilddatensätze entfernt;
+- werden zugehörige Piwigo-Derivate entfernt;
+- bleiben die Nextcloud-Originaldateien unangetastet;
+- werden Laufzeit- und Preview-Daten anschließend bereinigt.
+
+Zusätzlich läuft `runtime/cleanup-webdav-piwigo.php` im gemeinsamen Runner. Er erkennt verwaiste WebDAV-Piwigo-Sites, für die keine Connector-Verbindung mehr existiert, und entfernt deren Piwigo-Inhalte sowie Gallery-, Source-, Preview-, State-, Status- und Runtime-Reste. Damit werden auch bereits vor 0.9.6.1 gelöschte Verbindungen nachträglich bereinigt.
+
+## Gemeinsamer Runner
+
+`runtime/run-all.sh` verarbeitet die Schritte in kontrollierter Reihenfolge:
+
+1. lokale Verbindungen reconciliieren;
+2. WebDAV-Verbindungen reconciliieren;
+3. verwaiste WebDAV-Piwigo-Inhalte bereinigen;
+4. verwaiste allgemeine Runtime-Dateien bereinigen;
+5. aktive WebDAV-Verbindungen synchronisieren;
+6. aktive lokale Verbindungen synchronisieren.
+
+Der vorhandene systemd-Timer ruft direkt die Runtime aus dem installierten Plugin auf.
+
+## Status- und UI-Regeln
+
+- Hintergrund-Polling lädt die Admin-Seite nicht neu.
+- Ein geöffneter Verbindungsassistent bleibt bei Statusaktualisierungen geöffnet.
+- Fehlgeschlagene Fallback-/Credential-Prüfungen schließen den Assistenten nicht.
+- Laufzeitfehler unterscheiden WebDAV-Lesen, Piwigo-Synchronisierung, Preview- und Derivatfehler.
 
 ## Sicherheit
 
-- Nextcloud-Originale werden nicht gelöscht.
 - Connector-Zugangsdaten werden verschlüsselt gespeichert.
-- Wizard-Secrets bleiben serverseitig.
+- WebDAV-Credentials werden nur serverseitig verwendet.
-- Storage-Pfade werden validiert.
+- Bildzugriffe über `webdav-image.php` werden gegen Piwigos Zugriffsrechte geprüft.
-- SQL-View-Namen werden validiert.
+- Nextcloud-Originale werden weder beim Sync noch beim Löschen einer Verbindung verändert.
-- Piwigo-API ist versionsgebunden.
+- Derivate und Arbeitsbilder sind lokale Cache-/Arbeitsdaten und dürfen entfernt beziehungsweise neu aufgebaut werden.
-- Mutierende Admin-Aktionen verwenden Post/Redirect/Get, sodass Browser-Reloads sie nicht erneut ausführen.
-- Self-Updates sind an einen konkreten Commit und SHA-256 gebunden.
 
-## Noch offen
+## Aktueller Prüfstand
 
-- vollständiger Remote-Nextcloud-Adapter ohne direkten PostgreSQL-/Storage-Zugriff;
+Bereits umgesetzt:
-- weitere Bereinigung alter Legacy-Migrationshelfer, sobald sie nicht mehr benötigt werden;
-- weitere Endnutzer-Optimierung des Assistenten auf Basis realer Fehler- und Installationspfade.
 
-## Repository-Fallback
+- WebDAV-Verbindungsassistent;
+- Verzeichnisauswahl;
+- rekursiver WebDAV-Scan;
+- Shadow Tree;
+- separate Piwigo-Site je WebDAV-Verbindung;
+- sichtbare Albumstruktur ohne technische Wrapper;
+- echte Bildausgabe aus Nextcloud;
+- lokale vorbereitete Arbeitsbilder;
+- CLI-Derivatstrecke;
+- Piwigo-Nacharbeiten und Orphan-Abgleich;
+- ETag-basierte Wiederverwendung vorbereiteter Bilder;
+- Löschen einer Verbindung einschließlich Piwigo-Inhalten;
+- nachträgliche Bereinigung bereits verwaister WebDAV-Piwigo-Sites.
 
-GitHub bleibt das führende Repository. Das private Gitea-System dient weiterhin als Mirror/Fallback.
+Weiter zu prüfen beziehungsweise unter realer Last zu härten:
+
+- vollständiger Derivataufbau für alle in der Installation vorkommenden Standard- und Custom-Größen;
+- Verhalten bei großen Bildmengen und vielen gleichzeitig noch nicht vorbereiteten Bildern;
+- Fehlerfälle verschiedener Bildformate und Bild-Backends;
+- langfristige Änderungserkennung und Performance im produktiven Einsatz.
+
+## Versionsregel
+
+Die aktuelle Versionslinie ist **0.9.6.x**. Weitere Sprünge auf eine neue Minor-/Major-Linie erfolgen nur bewusst und ausdrücklich.

README.md

@@ -2,7 +2,7 @@
 
 Modulares Piwigo-Plugin für Administration, Bildverarbeitung, geschützte Freigaben, Fotoauswahl und die Anbindung von Nextcloud an Piwigo.
 
-Aktuelle Plugin-Version: **0.9.4.2**
+Aktuelle Plugin-Version: **0.9.6.1**
 
 ## Grundprinzip
 
@@ -12,113 +12,131 @@ Für die Administration gilt: Der normale Nutzer sieht Aufgaben, Entscheidungen
 
 ## NC Connector
 
-Der NC Connector synchronisiert ausdrücklich freigegebene Nextcloud-Inhalte mit Piwigo.
+Der NC Connector synchronisiert ausdrücklich ausgewählte Nextcloud-Inhalte mit Piwigo.
 
 ### Datenmodell
 
 - Nextcloud bleibt die Quelle der Originaldateien.
-- Originalbilder werden nicht in eine zweite dauerhafte Bibliothek kopiert.
+- Originalbilder werden nicht dauerhaft in eine zweite Bibliothek unter Piwigo kopiert.
-- Ein Shadow Tree erzeugt die für Piwigo benötigte Verzeichnisstruktur mit Symlinks.
+- Ein Shadow Tree erzeugt die für Piwigo benötigte Ordnerstruktur.
-- Ordnerfreigaben werden als physische Piwigo-Alben synchronisiert.
+- Ordner werden als physische Piwigo-Alben synchronisiert.
-- Einzeldateifreigaben werden im Galerie-Root verlinkt und als echte Piwigo-Orphans ohne Albumzuordnung registriert.
+- Root-Dateien können als Piwigo-Orphans registriert werden.
-- Entfernte Freigaben werden aus Shadow Tree und Piwigo entfernt, das Nextcloud-Original bleibt erhalten.
 - Neu importierte physische Connector-Alben werden privat angelegt.
+- Entfernte Quellen werden aus Shadow Tree und Piwigo entfernt; die Nextcloud-Originale bleiben erhalten.
 
-### Verbindungsassistent
+### Bestehende lokale Quellenmodi
 
-Neue Verbindungen werden bevorzugt mit einem Endnutzer-Assistenten angelegt.
+Der bestehende Connector unterstützt weiterhin:
 
-Ablauf:
+- `legacy-view`
+- `user-shares`
+- `selected-fileids`
 
-1. Nextcloud-Adresse, Benutzer und Passwort eingeben.
+Diese Modi bleiben erhalten. Es gibt keine automatische Migration auf WebDAV.
-2. Der Assistent prüft HTTP/HTTPS, Nextcloud-Status und Anmeldung.
-3. Vorhandene passende Connector-Daten werden automatisch wiederverwendet, wenn sie sicher zugeordnet werden können.
-4. Für den Nextcloud-Datenzugriff wird zunächst nur der eingerichtete Lese-Benutzer mit Passwort abgefragt. Der übliche PostgreSQL-Weg wird automatisch geprüft.
-5. Nur wenn diese Prüfung scheitert, werden abweichende Datenbank-Adresse, Port und Datenbankname gezielt abgefragt.
-6. Nicht automatisch zuordenbare Storage-Mounts werden einzeln bestätigt.
-7. Danach wird der Nextcloud-Benutzer gewählt, dessen Freigaben verwendet werden sollen. Empfohlen wird ein eigener `showcase`-Benutzer.
-8. Piwigo-API-Zugang testen oder bewusst überspringen.
-9. Optionaler bzw. bei übersprungener API verpflichtender Login-Fallback.
-10. Erst der Abschluss legt die Verbindung dauerhaft an.
 
-Wizard-Geheimnisse werden während der Einrichtung serverseitig in der Sitzung gehalten. Ein fehlgeschlagener Test leert die Eingaben nicht. Ein API-Test verändert die dauerhafte API-Konfiguration erst beim erfolgreichen Abschluss des Assistenten.
+### WebDAV-Modus
 
-Die vollständige technische Maske bleibt weiterhin über **Ohne Assistent anlegen** sowie bei bestehenden Verbindungen unter **Technische Einstellungen** erreichbar.
+Der neue Endnutzerpfad verwendet `source_mode=webdav-placeholder` und `adapter=remote`.
 
-### Lokaler Adapter
+Benötigt werden nur:
 
-Der derzeit produktive Adapter verwendet:
+- Nextcloud-Adresse;
+- Nextcloud-Benutzer bzw. App-Passwort;
+- normaler WebDAV-Zugriff auf die Inhalte dieses Benutzers;
+- eine normale Piwigo-Installation mit ihrer vorhandenen PHP-/Bildverarbeitungsumgebung.
 
-- PostgreSQL-Reader mit minimalen Leserechten;
+Nicht vorausgesetzt werden:
-- Source-View `piwigo_showcase_sources`;
-- Activity-View `piwigo_showcase_activity`;
-- explizite Storage-Zuordnungen auf bereits vorhandene lokale Mounts;
-- Plugin-eigene Runtime und getrennten State pro Verbindung.
 
-Ein Storage-Mapping besteht aus `storage_id`, einem optionalen `source_prefix` und dem lokalen Mount. Ein leerer Prefix ist zulässig und bedeutet, dass der Mount direkt dem Storage-Root entspricht.
+- PostgreSQL-Zugriff auf Nextcloud;
+- `occ`-Adminzugriff;
+- Storage-IDs oder Backend-Pfade;
+- zusätzliche Host-Mounts;
+- FUSE;
+- davfs;
+- rclone.
 
-### Activity Gate
+### WebDAV-Ablauf
 
-Der regelmäßige Lauf berücksichtigt:
+1. Der Assistent prüft Nextcloud und liest die sichtbaren Verzeichnisse per WebDAV.
-
+2. Ausgewählte Verzeichnisse werden rekursiv per PROPFIND eingelesen.
-- Nextcloud-Aktivität;
+3. Ordner, Dateiname, Nextcloud-Datei-ID, MIME-Typ, Größe, ETag und WebDAV-Pfad werden erfasst.
-- Signatur der sichtbaren Freigaben;
+4. `runtime/lib/build_webdav_placeholder_source.py` erzeugt eine lokale Platzhalterquelle ohne dauerhafte Originalkopie.
-- Quiet-Time;
+5. `runtime/lib/shadow_tree.py` baut daraus den verbindungseigenen Shadow Tree.
-- maximale Wartezeit;
+6. Der WebDAV-Galeriebaum liegt unter `_data/bratonien-tools/nc-webdav-gallery/connection-ID`.
-- periodischen Full-Sync;
+7. Jede WebDAV-Verbindung wird als eigene physische Piwigo-Site registriert. Die ausgewählte Nextcloud-Wurzel erscheint dadurch direkt als Album; technische `bratonien-webdav-ID`-Wrapper bleiben unsichtbar.
-- notwendigen Reparaturlauf bei beschädigtem Shadow Tree oder fehlenden Piwigo-Alben.
+8. `runtime/lib/precache-webdav-previews.php` erzeugt vorbereitete Arbeitsbilder als JPEG beziehungsweise PNG mit maximal 4096 px Kantenlänge.
+9. `runtime/lib/build-webdav-derivatives.php` korrigiert die Piwigo-Bildabmessungen und erzeugt die konfigurierten Standard- und Custom-Derivate im Hintergrundlauf.
+10. Der Frontend-Aufruf erzeugt keine Derivate. Fehlt eines, wird das vorbereitete Arbeitsbild als sicherer Fallback ausgeliefert.
+11. Wenn das Original benötigt wird, streamt `webdav-image.php` es serverseitig direkt aus Nextcloud. Zugangsdaten werden dem Browser nicht offengelegt.
 
 ### Piwigo-Synchronisierung
 
-Der produktive Lauf ist API-first:
+Der WebDAV-Pfad nutzt die vorhandene Piwigo-Synchronisationslogik mit einer verbindungseigenen Site.
 
-1. `bratonien.nc.syncProductive` für physische Alben und Bilder;
+Nach dem Dateiabgleich laufen die vorhandenen Nacharbeiten, darunter:
-2. `bratonien.nc.syncOrphans` für Root-Dateien;
-3. Benutzername/Passwort nur als optionaler Fallback.
 
-Die produktive direkte API-Synchronisierung ist aktuell ausdrücklich für **Piwigo 16.4.0** freigegeben. Bei einer anderen Piwigo-Version wird sie nicht stillschweigend als kompatibel angenommen.
+- Metadaten-Synchronisierung;
+- Bild- und Kategorieintegrität;
+- Uppercats/Kategoriestruktur;
+- globale Ränge;
+- Pfadpflege;
+- Rating-Score;
+- Benutzer-Cache-Invalidierung;
+- Orphan-Abgleich.
 
-Der direkte produktive Sync führt außerdem die für den normalen Piwigo-Import relevanten Nacharbeiten aus, darunter Albuminformationen, globale Ränge, Bildinformationen, Pfade und Cache-Invalidierung. Er ruft dafür keine Admin-Seite fernsteuernd auf.
+Die direkte produktive Synchronisierung ist aktuell ausdrücklich auf **Piwigo 16.4.0** abgestimmt.
+
+### Fallback-Zugang
+
+Piwigo wird API-first angesprochen. Ist für eine Verbindung keine API konfiguriert, kann Benutzername/Passwort als Fallback verwendet werden.
+
+Der Assistent prüft Fallback-Zugangsdaten vor dem Speichern. Eine fehlgeschlagene Prüfung schließt oder leert den Assistenten nicht.
+
+### Statusanzeige
+
+Die Administration zeigt den Laufzeitstatus regelmäßig im Hintergrund an. Dafür wird die Admin-Seite nicht neu geladen; offene Dialoge, Assistenten und aufgeklappte Bereiche bleiben erhalten.
+
+Fehler werden nach Prozessschritt getrennt dargestellt, unter anderem für WebDAV-Einlesen, Piwigo-Synchronisierung, Preview-Erzeugung und Derivat-Erzeugung.
+
+### Löschen einer Verbindung
+
+Seit **0.9.6.1** besitzt der WebDAV-Pfad einen vollständigen Lösch-Lebenszyklus:
+
+- Beim Löschen einer WebDAV-Verbindung werden ihre Piwigo-Site, Alben und Bilddatensätze entfernt.
+- Zugehörige Piwigo-Derivate werden entfernt.
+- Nextcloud-Originale bleiben unverändert.
+- Runtime-, Shadowtree-, Source-, Preview- und Statusdaten werden bereinigt.
+- `runtime/cleanup-webdav-piwigo.php` erkennt zusätzlich bereits verwaiste WebDAV-Piwigo-Sites, für die keine Connector-Verbindung mehr existiert, und bereinigt sie im gemeinsamen Runner nachträglich.
 
 ### Runtime
 
-Aktive Verbindungen werden über einen gemeinsamen systemd-Timer verarbeitet:
+Aktive Verbindungen werden über den gemeinsamen Runner verarbeitet:
 
 - `bratonien-nc-connector.timer`
 - `bratonien-nc-connector.service`
 - `runtime/run-all.sh`
-- `runtime/sync.sh`
 
 Verbindungsspezifische Konfigurationen liegen unter `/etc/bratonien-tools/nc-connector/`, State-Daten unter `/var/lib/bratonien-tools/nc-connector/connection-ID`.
 
-Der Shadow-Tree-Austausch besitzt einen Rollback: Scheitert der Wechsel auf den neuen Baum, wird der vorherige Galeriebaum wiederhergestellt.
+Die Reihenfolge des gemeinsamen Laufs ist:
 
-### Statusanzeige
+1. lokale Verbindungen reconciliieren;
-
+2. WebDAV-Verbindungen reconciliieren;
-Die Administration zeigt letzten und nächsten Lauf. Der Status wird regelmäßig im Hintergrund abgefragt. Dafür wird die Admin-Seite **nicht** neu geladen; offene Dialoge, Assistenten und aufgeklappte Bereiche bleiben erhalten.
+3. verwaiste WebDAV-Piwigo-Inhalte bereinigen;
-
+4. allgemeine verwaiste Runtime-Dateien bereinigen;
-### Bestehende Verbindungen
+5. WebDAV-Verbindungen synchronisieren;
-
+6. lokale Verbindungen synchronisieren.
-Bestehende Verbindungen können:
-
-- umbenannt;
-- geprüft;
-- technisch bearbeitet, solange sie nicht aktiv sind;
-- deaktiviert und anschließend gelöscht werden.
-
-Das Löschen einer Connector-Verbindung entfernt keine Nextcloud-Originale und keine Piwigo-Bilder. Erreichbare Connector-eigene Status-/State-Daten der Verbindung werden bereinigt.
-
-### Legacy-Migration
-
-Für ältere Installationen mit dem früheren separaten `piwigo-sync` existieren weiterhin Migrations-/Cutover-Helfer. Neue Installationen sollen den nativen Connector-Weg verwenden.
 
 ## Bildcache
 
+Bratonien Tools kann:
+
 - Piwigo-Bildderivate gezielt leeren;
 - vorhandene Bildgrößen neu erzeugen;
-- Cache-Aufbau als Worker-Prozess starten und abbrechen;
+- den Cache-Aufbau als Worker-Prozess starten und abbrechen;
-- Worker-Zahl automatisch oder manuell konfigurieren;
+- die Worker-Zahl automatisch oder manuell konfigurieren.
-- Originalbilder bleiben unangetastet.
+
+Originalbilder bleiben unangetastet.
 
 ## Wasserzeichenverwaltung
 
@@ -128,7 +146,7 @@ Für ältere Installationen mit dem früheren separaten `piwigo-sync` existieren
 - Album-Ausnahmen und Vererbung;
 - Position, Transparenz und Skalierung;
 - eigener Runtime-Filter für Piwigo-Derivate;
-- bisherige Piwigo-Wasserzeichenkonfiguration wird beim Aktivieren gesichert.
+- Sicherung der bisherigen Piwigo-Wasserzeichenkonfiguration beim Aktivieren.
 
 ## Bilddateien und Pfade
 
@@ -171,37 +189,34 @@ Die Piwigo-Bilddetailseite erhält responsive Navigationszonen für vorheriges B
 Der integrierte Updater:
 
 - liest den Zielstand aus GitHub;
-- bindet ein Update an einen konkreten Commit statt an einen während des Updates beweglichen Branch-Stand;
+- bindet ein Update an einen konkreten Commit;
 - prüft Version und SHA-256 des Zielstands;
 - erstellt vor dem Austausch ein Backup;
-- nutzt Post/Redirect/Get, damit ein Browser-Reload keine schreibende Aktion erneut ausführt;
+- nutzt Post/Redirect/Get;
 - verlangt Webmaster-Rechte, `ZipArchive` und ausreichende Schreibrechte.
 
-## Architektur
+## Wichtige Dateien und Verzeichnisse
-
-Wichtige Dateien und Verzeichnisse:
 
 - `main.inc.php` – Plugin-Einstieg und Runtime-Hooks
-- `admin.php` – zentraler Admin-Controller mit Post/Redirect/Get
+- `admin.php` – zentraler Admin-Controller
-- `include/tool_registry.inc.php` – Registry administrativer Aktionen
 - `include/nc_connector.inc.php` – Datenmodell und gemeinsame Connector-Funktionen
-- `include/nc_connector_wizard.inc.php` – Endnutzer-Assistent und Connection-Bearbeitung
+- `include/nc_connector_wizard.inc.php` – Verbindungsassistent
-- `include/nc_connector_manage.inc.php` – Credential-Format, Storage-Mappings, Verifikation und Löschen
+- `include/nc_connector_wizard_webdav_flow.inc.php` – WebDAV-first-Wizardablauf
-- `include/nc_connector_create_api.inc.php` – API-first-Verbindungserstellung
+- `include/nc_connector_delete_safe.inc.php` – sicheres Löschen einschließlich WebDAV-Piwigo-Inhalten
-- `include/nc_connector_piwigo_api.inc.php` – API-Zugang und Fallback-Verwaltung
-- `include/nc_connector_system.inc.php` – Timer- und Laufzeitstatus
 - `include/nc_productive_ws.inc.php` – produktiver Piwigo-Dateisync
 - `include/nc_orphan_ws.inc.php` – Orphan-Synchronisierung
-- `runtime/lib/activity_gate.py` – Activity Gate
+- `include/webdav_image_runtime.inc.php` – WebDAV-Bildzuordnung, Preview-/Derivathilfen und URL-Filter
-- `runtime/lib/build_manifest.py` – Auflösung der Nextcloud-Freigaben auf Storage-Mounts
+- `webdav-image.php` – berechtigungsgeprüfter WebDAV-Bildstream
-- `runtime/lib/shadow_tree.py` – atomarer Shadow Tree mit Rollback
+- `runtime/reconcile-webdav.php` – WebDAV-Runtime-Reconcile
-- `runtime/lib/piwigo-sync.php` – API-first-Piwigo-Sync mit Fallback
+- `runtime/cleanup-webdav-piwigo.php` – Bereinigung gelöschter/verwaister WebDAV-Verbindungen in Piwigo
-- `runtime/run-all.sh` – Multi-Connection-Runner
+- `runtime/sync-webdav.sh` – Ablauf einer WebDAV-Verbindung
-- `runtime/sync.sh` – Ablauf einer Verbindung
+- `runtime/run-all.sh` – gemeinsamer Multi-Connection-Runner
-- `nc-connector-install.php` – native Root-Aktivierung
+- `runtime/lib/build_webdav_placeholder_source.py` – rekursiver WebDAV-Scan und Platzhalterquelle
-- `nc-connector-disable.php` – Deaktivierung
+- `runtime/lib/precache-webdav-previews.php` – vorbereitete JPEG-/PNG-Arbeitsbilder
-- `nc-connector-normalize.php` – Normalisierung älterer aktiver Verbindungen
+- `runtime/lib/build-webdav-derivatives.php` – CLI-Derivat-Builder
-- `nc-connector-*-cleanup/switch/cutover` – Legacy-Migrationshelfer
+- `runtime/lib/shadow_tree.py` – atomarer Shadow Tree
+- `runtime/lib/piwigo-sync.php` – Piwigo-Sync mit API/Fallback
+- `main-cache-build.php` – allgemeiner Piwigo-Derivat-/Cache-Builder
 - `include/self_update.inc.php` – Self-Updater
 - `include/album_shares.inc.php` – geschützte Albumfreigaben
 - `include/public_selection.inc.php` – Fotoauswahl
@@ -214,15 +229,18 @@ Wichtige Dateien und Verzeichnisse:
 
 - administrative Schreibaktionen verwenden Piwigos CSRF-Schutz;
 - Connector-Zugangsdaten werden verschlüsselt gespeichert;
-- Wizard-Geheimnisse werden nicht in Browser-Web-Storage persistiert;
+- Nextcloud-Zugangsdaten werden verbindungseigen gespeichert und nur serverseitig verwendet;
-- Storage-Mounts werden explizit zugeordnet und validiert;
+- Wizard-Geheimnisse werden nicht im Browser-Web-Storage persistiert;
 - SQL-View-Namen werden vor Verwendung validiert;
-- gefährliche technische Pfade sind nicht Teil des normalen Wizard-Happy-Paths;
 - produktive Piwigo-API ist versionsgebunden;
 - Originalbilder werden vom Connector nicht gelöscht;
-- Update-Pakete werden an Commit und Hash gebunden;
+- WebDAV-Originalbilder werden nicht dauerhaft lokal gespeichert;
-- Root-Helfer prüfen CLI-/Root-Ausführung, bevor sie Systemdienste oder `/etc`-/`/var/lib`-Daten verändern.
+- Update-Pakete werden an Commit und Hash gebunden.
 
 ## Entwicklungsstand
 
-`0.9.4.x` ist der aktuelle Entwicklungsblock. Der lokale NC Connector ist End-to-End produktiv im Einsatz. Der Verbindungsassistent und die Verwaltung werden weiter aus Endnutzersicht konsolidiert. Ein vollständig entfernter Nextcloud-Adapter ohne direkten PostgreSQL-/Storage-Zugriff ist noch nicht umgesetzt.
+`0.9.6.x` ist die aktuelle Versionslinie.
+
+Mit **0.9.6.1** ist der WebDAV-Pfad einschließlich Piwigo-Registrierung, vorbereiteter Bildquelle, CLI-Derivatstrecke und Lösch-/Cleanup-Lebenszyklus im Repository umgesetzt. Der bestehende lokale Connector bleibt parallel erhalten.
+
+Der jeweils detaillierte Prüf- und Entwicklungsstand steht in [`CURRENT_STATUS.md`](CURRENT_STATUS.md).

include/nc_connector_connection_scope.inc.php

@@ -0,0 +1,231 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_wizard_finish_connection_scoped()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((int)$state['step'] !== 4 || empty($state['technical_complete']) || trim((string)$state['showcase_user']) === '') throw new RuntimeException('Der Assistent ist noch nicht vollständig.');
+
+  if (array_key_exists('nc_wizard_fallback_user', $_POST)) $state['_fallback_user'] = trim((string)$_POST['nc_wizard_fallback_user']);
+  if (array_key_exists('nc_wizard_fallback_password', $_POST)) $state['_fallback_password'] = (string)$_POST['nc_wizard_fallback_password'];
+  bratonien_tools_nc_wizard_store($state);
+
+  $fallback_user = trim((string)$state['_fallback_user']);
+  $fallback_password = (string)$state['_fallback_password'];
+  if (($fallback_user === '') !== ($fallback_password === '')) throw new RuntimeException('Fallback-Benutzer und Fallback-Passwort müssen entweder beide angegeben oder beide leer gelassen werden.');
+  if ($state['api_status'] !== 'ok' && $fallback_user === '') throw new RuntimeException('Da die Piwigo-API übersprungen wurde, ist für diese Verbindung ein Fallback-Zugang erforderlich.');
+
+  $mapping_lines = array();
+  foreach ((array)$state['storages'] as $storage)
+  {
+    $key = (string)$storage['storage_id'].'|'.trim((string)$storage['source_prefix'], '/').'|'.(string)$storage['local_mount'];
+    $mapping_lines[$key] = (string)$storage['storage_id'].' | '.trim((string)$storage['source_prefix'], '/').' | '.(string)$storage['local_mount'];
+  }
+
+  $_POST['nc_name']=(string)$state['connection_name'];
+  $_POST['nc_host']=(string)$state['db_host'];
+  $_POST['nc_port']=(string)$state['db_port'];
+  $_POST['nc_database']=(string)$state['db_database'];
+  $_POST['nc_user']=(string)$state['db_user'];
+  $_POST['nc_db_password']=(string)$state['_db_password'];
+  $_POST['nc_source_view']=(string)$state['source_view'];
+  $_POST['nc_activity_view']=(string)$state['activity_view'];
+  $_POST['nc_gallery_root']=(string)$state['gallery_root'];
+  $_POST['nc_storages']=implode("\n",array_values($mapping_lines));
+  $_POST['nc_quiet_seconds']='120';
+  $_POST['nc_max_wait_seconds']='900';
+  $_POST['nc_full_sync_seconds']='86400';
+  $_POST['nc_piwigo_user']=$fallback_user;
+  $_POST['nc_piwigo_password']=$fallback_password;
+  $_POST['nc_nextcloud_url']=(string)$state['base_url'];
+  $_POST['nc_showcase_user']=(string)$state['showcase_user'];
+  $_POST['nc_access_user']=(string)$state['username'];
+  $_POST['nc_nextcloud_user']=(string)$state['username'];
+  $_POST['nc_nextcloud_password']=(string)$state['_password'];
+  $_POST['nc_product']=(string)$state['product'];
+  $_POST['nc_version']=(string)$state['version'];
+  $_POST['nc_api_validated']=$state['api_status']==='ok'?'1':'0';
+  $_POST['nc_connection_api_key_id']=$state['api_status']==='ok'?(string)$state['_api_key_id']:'';
+  $_POST['nc_connection_api_key_secret']=$state['api_status']==='ok'?(string)$state['_api_key_secret']:'';
+
+  $result = bratonien_tools_nc_connector_create_local_api_first();
+  $connection_id = (int)($result['connection_id'] ?? 0);
+  if ($connection_id < 1) throw new RuntimeException('Die neue Verbindung konnte nicht gespeichert werden.');
+
+  $connection = bratonien_tools_nc_connector_connection($connection_id, false);
+  if (!$connection) throw new RuntimeException('Die neue Verbindung konnte nach dem Anlegen nicht gelesen werden.');
+  $config = $connection['config'];
+  $config['storages'] = array_values($state['storages']);
+  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($config_json)) throw new RuntimeException('Die Verzeichnisauswahl konnte nicht serialisiert werden.');
+  $table = bratonien_tools_nc_connector_table();
+  pwg_query("UPDATE `$table` SET config_json='".pwg_db_real_escape_string($config_json)."' WHERE id=".$connection_id." LIMIT 1");
+
+  unset($_SESSION['bratonien_nc_wizard']);
+  unset($result['connection_id']);
+  $result['message'] = 'Verbindung wurde vollständig mit eigener Authentifizierung angelegt. '.$result['message'];
+  return $result;
+}
+
+function bratonien_tools_nc_connector_delete_any()
+{
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $connection = bratonien_tools_nc_connector_connection($id, false);
+  if (!$connection) throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
+
+  $status_dir = rtrim(PHPWG_ROOT_PATH, '/').'/_data/bratonien-tools/nc-connector-status';
+  if (!is_dir($status_dir) && !@mkdir($status_dir, 0755, true) && !is_dir($status_dir)) throw new RuntimeException('Der Connector-Statusordner konnte nicht angelegt werden.');
+
+  $tombstone = $status_dir.'/deleted-'.$id;
+  if (@file_put_contents($tombstone, date('c')."\n", LOCK_EX) === false) throw new RuntimeException('Die Verbindung konnte nicht sicher für die Laufzeit deaktiviert werden.');
+
+  $public_status = $status_dir.'/connection-'.$id.'.json';
+  if (is_file($public_status)) @unlink($public_status);
+
+  $config = is_array($connection['config'] ?? null) ? $connection['config'] : array();
+  $state_dir = rtrim((string)($config['state_dir'] ?? ''), '/');
+  if ($state_dir !== '' && strpos($state_dir, '/var/lib/bratonien-tools/nc-connector/connection-'.$id) === 0 && file_exists($state_dir))
+  {
+    bratonien_tools_nc_connector_remove_tree($state_dir);
+  }
+
+  $table = bratonien_tools_nc_connector_table();
+  pwg_query("DELETE FROM `$table` WHERE id=".$id." LIMIT 1");
+  return array('message'=>'Connector-Verbindung wurde gelöscht und für weitere Laufzeitabrufe gesperrt. Nextcloud- und Piwigo-Bilder blieben unverändert.');
+}
+
+function bratonien_tools_nc_connector_verify_connection_scoped()
+{
+  $result = bratonien_tools_nc_connector_verify_managed();
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $connection = bratonien_tools_nc_connector_connection($id, true);
+  if (!$connection) return $result;
+
+  $config = is_array($connection['config'] ?? null) ? $connection['config'] : array();
+  if ((string)($config['origin'] ?? '') !== 'native' || array_key_exists('api_enabled', $config)) return $result;
+
+  $credentials = bratonien_tools_nc_connector_credentials_from_blob($connection['secret_blob'] ?? '');
+  $db_password = (string)($credentials['db_password'] ?? '');
+  $fallback_user = (string)($credentials['piwigo_user'] ?? '');
+  $fallback_password = (string)($credentials['piwigo_password'] ?? '');
+  if ($db_password === '') return $result;
+
+  $api_key_id = '';
+  $api_key_secret = '';
+  if ($fallback_user === '')
+  {
+    $legacy_api = bratonien_tools_nc_api_credentials();
+    $api_key_id = trim((string)($legacy_api['key_id'] ?? ''));
+    $api_key_secret = trim((string)($legacy_api['key_secret'] ?? ''));
+  }
+
+  $payload = json_encode(array(
+    'v'=>3,
+    'db_password'=>$db_password,
+    'piwigo_user'=>$fallback_user,
+    'piwigo_password'=>$fallback_password,
+    'api_key_id'=>$api_key_id,
+    'api_key_secret'=>$api_key_secret,
+    'nextcloud_user'=>'',
+    'nextcloud_password'=>'',
+  ), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($payload)) throw new RuntimeException('Verbindungsauthentifizierung konnte nicht migriert werden.');
+
+  $config['piwigo_auth'] = 'connection-scoped';
+  $config['api_enabled'] = $api_key_id !== '';
+  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($config_json)) throw new RuntimeException('Connector-Konfiguration konnte nicht migriert werden.');
+
+  $blob = bratonien_tools_nc_connector_encrypt_secret($payload);
+  $table = bratonien_tools_nc_connector_table();
+  pwg_query("UPDATE `$table` SET config_json='".pwg_db_real_escape_string($config_json)."', secret_blob='".pwg_db_real_escape_string($blob)."' WHERE id=".$id." LIMIT 1");
+  return $result;
+}
+
+function bratonien_tools_nc_connector_scoped_secret(array $connection)
+{
+  $plain = bratonien_tools_nc_connector_decrypt_secret($connection['secret_blob'] ?? '');
+  $decoded = json_decode($plain, true);
+  if (is_array($decoded) && array_key_exists('db_password', $decoded))
+  {
+    return array(
+      'v'=>3,
+      'db_password'=>(string)($decoded['db_password'] ?? ''),
+      'piwigo_user'=>(string)($decoded['piwigo_user'] ?? ''),
+      'piwigo_password'=>(string)($decoded['piwigo_password'] ?? ''),
+      'api_key_id'=>(string)($decoded['api_key_id'] ?? ''),
+      'api_key_secret'=>(string)($decoded['api_key_secret'] ?? ''),
+      'nextcloud_user'=>(string)($decoded['nextcloud_user'] ?? ''),
+      'nextcloud_password'=>(string)($decoded['nextcloud_password'] ?? ''),
+    );
+  }
+
+  return array(
+    'v'=>3,
+    'db_password'=>(string)$plain,
+    'piwigo_user'=>'',
+    'piwigo_password'=>'',
+    'api_key_id'=>'',
+    'api_key_secret'=>'',
+    'nextcloud_user'=>'',
+    'nextcloud_password'=>'',
+  );
+}
+
+function bratonien_tools_nc_connector_store_scoped_secret($id, array $connection, array $credentials)
+{
+  $config = is_array($connection['config'] ?? null) ? $connection['config'] : array();
+  $is_webdav = (string)($config['source_mode'] ?? '') === 'webdav-placeholder';
+  if (!$is_webdav && trim((string)($credentials['db_password'] ?? '')) === '') throw new RuntimeException('Das Datenbankpasswort der Verbindung fehlt.');
+  if ($is_webdav && (trim((string)($credentials['nextcloud_user'] ?? '')) === '' || (string)($credentials['nextcloud_password'] ?? '') === ''))
+  {
+    throw new RuntimeException('Die Nextcloud-Zugangsdaten der WebDAV-Verbindung fehlen.');
+  }
+
+  $credentials['v'] = 3;
+  $payload = json_encode($credentials, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($payload)) throw new RuntimeException('Verbindungszugangsdaten konnten nicht serialisiert werden.');
+  $blob = bratonien_tools_nc_connector_encrypt_secret($payload);
+
+  if (array_key_exists('api_enabled', $config))
+  {
+    $config['api_enabled'] = trim((string)($credentials['api_key_id'] ?? '')) !== '' && trim((string)($credentials['api_key_secret'] ?? '')) !== '';
+  }
+  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($config_json)) throw new RuntimeException('Connector-Konfiguration konnte nicht serialisiert werden.');
+
+  $table = bratonien_tools_nc_connector_table();
+  $now = date('Y-m-d H:i:s');
+  pwg_query("UPDATE `$table` SET secret_blob='".pwg_db_real_escape_string($blob)."', config_json='".pwg_db_real_escape_string($config_json)."', updated='".pwg_db_real_escape_string($now)."' WHERE id=".(int)$id." LIMIT 1");
+}
+
+function bratonien_tools_nc_connector_fallback_save_scoped()
+{
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $username = trim((string)($_POST['nc_fallback_user'] ?? ''));
+  $password = (string)($_POST['nc_fallback_password'] ?? '');
+  if ($username === '' || $password === '') throw new RuntimeException('Benutzername und Passwort für den Fallback müssen angegeben werden.');
+
+  $connection = bratonien_tools_nc_connector_connection($id, true);
+  if (!$connection) throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
+  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
+  $credentials['piwigo_user'] = $username;
+  $credentials['piwigo_password'] = $password;
+  bratonien_tools_nc_connector_store_scoped_secret($id, $connection, $credentials);
+  return array('message'=>'Piwigo-Benutzername und Passwort wurden als Fallback dieser Verbindung gespeichert.');
+}
+
+function bratonien_tools_nc_connector_fallback_delete_scoped()
+{
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $connection = bratonien_tools_nc_connector_connection($id, true);
+  if (!$connection) throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
+  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
+  $credentials['piwigo_user'] = '';
+  $credentials['piwigo_password'] = '';
+  bratonien_tools_nc_connector_store_scoped_secret($id, $connection, $credentials);
+  return array('message'=>'Fallback dieser Verbindung wurde gelöscht. Ein vorhandener API-Zugang blieb unverändert.');
+}

include/nc_connector_create_api.inc.php

@@ -5,6 +5,11 @@ if (!defined('PHPWG_ROOT_PATH'))
 }
 
 function bratonien_tools_nc_connector_create_local_api_first()
+{
+  throw new RuntimeException('Neue Verbindungen über die alte lokale PostgreSQL-/Storage-Struktur sind ab 0.9.6.2 gesperrt. Bestehende lokale Verbindungen bleiben für die schrittweise Migration weiterhin aktiv. Neue Verbindungen müssen über den WebDAV-Assistenten angelegt werden.');
+}
+
+function bratonien_tools_nc_connector_create_local_api_first_legacy()
 {
   $required = array(
     'nc_name' => 'Name',
@@ -28,11 +33,30 @@ function bratonien_tools_nc_connector_create_local_api_first()
     throw new RuntimeException('Fallback-Benutzer und Fallback-Passwort muessen entweder beide angegeben oder beide leer gelassen werden.');
   }
 
-  $api = bratonien_tools_nc_api_credentials();
+  $nextcloud_user = trim((string)($_POST['nc_nextcloud_user'] ?? $_POST['nc_access_user'] ?? ''));
-  $validated_pending_api = (string)($_POST['nc_api_validated'] ?? '') === '1';
+  $nextcloud_password = (string)($_POST['nc_nextcloud_password'] ?? '');
-  if (($api['key_id'] ?? '') === '' && $fallback_user === '' && !$validated_pending_api)
+  if (($nextcloud_user === '') !== ($nextcloud_password === ''))
   {
-    throw new RuntimeException('Es ist weder ein geprüfter Piwigo-API-Zugang noch ein Benutzername/Passwort-Fallback vorhanden.');
+    throw new RuntimeException('Nextcloud-Benutzer und Nextcloud-Passwort muessen entweder beide vorhanden oder beide leer sein.');
+  }
+
+  $wizard_auth_present = array_key_exists('nc_api_validated', $_POST);
+  $validated_pending_api = (string)($_POST['nc_api_validated'] ?? '') === '1';
+  $api_key_id = trim((string)($_POST['nc_connection_api_key_id'] ?? ''));
+  $api_key_secret = trim((string)($_POST['nc_connection_api_key_secret'] ?? ''));
+  if (($api_key_id === '') !== ($api_key_secret === ''))
+  {
+    throw new RuntimeException('API-Schluessel-ID und API-Geheimnis muessen entweder beide vorhanden oder beide leer sein.');
+  }
+  if (($validated_pending_api || (!$wizard_auth_present && $fallback_user === '')) && $api_key_id === '')
+  {
+    $legacy_api = bratonien_tools_nc_api_credentials();
+    $api_key_id = trim((string)($legacy_api['key_id'] ?? ''));
+    $api_key_secret = trim((string)($legacy_api['key_secret'] ?? ''));
+  }
+  if ($api_key_id === '' && $fallback_user === '')
+  {
+    throw new RuntimeException('Fuer diese Verbindung ist weder ein eigener gepruefter API-Zugang noch ein Benutzername/Passwort-Fallback vorhanden.');
   }
 
   $port = (int)($_POST['nc_port'] ?? 5432);
@@ -42,7 +66,7 @@ function bratonien_tools_nc_connector_create_local_api_first()
   if (strpos($gallery_root, './') === 0)
   {
     $piwigo_root = realpath(PHPWG_ROOT_PATH);
-    if ($piwigo_root === false) throw new RuntimeException('Piwigo-Stammverzeichnis konnte nicht aufgelöst werden.');
+    if ($piwigo_root === false) throw new RuntimeException('Piwigo-Stammverzeichnis konnte nicht aufgeloest werden.');
     $gallery_root = rtrim($piwigo_root, '/').'/'.ltrim(substr($gallery_root, 2), '/');
   }
   if ($gallery_root === '' || $gallery_root[0] !== '/') throw new RuntimeException('Der Galerie-Pfad muss ein absoluter Pfad sein.');
@@ -60,7 +84,9 @@ function bratonien_tools_nc_connector_create_local_api_first()
     'max_wait_seconds'=>max(60,(int)($_POST['nc_max_wait_seconds'] ?? 900)),
     'full_sync_seconds'=>max(300,(int)($_POST['nc_full_sync_seconds'] ?? 86400)),
     'storages'=>bratonien_tools_nc_connector_parse_storages($_POST['nc_storages'] ?? ''),
-    'origin'=>'native','piwigo_auth'=>'api-first',
+    'origin'=>'native',
+    'piwigo_auth'=>'connection-scoped',
+    'api_enabled'=>$api_key_id !== '',
   );
   foreach (array('nextcloud_url'=>'nc_nextcloud_url','showcase_user'=>'nc_showcase_user','nextcloud_access_user'=>'nc_access_user','nextcloud_product'=>'nc_product','nextcloud_version'=>'nc_version') as $config_key=>$post_key)
   {
@@ -69,9 +95,21 @@ function bratonien_tools_nc_connector_create_local_api_first()
   bratonien_tools_nc_connector_view_name($config['source_view']);
   bratonien_tools_nc_connector_view_name($config['activity_view']);
 
+  $secret_payload = json_encode(array(
+    'v'=>3,
+    'db_password'=>(string)$_POST['nc_db_password'],
+    'piwigo_user'=>$fallback_user,
+    'piwigo_password'=>$fallback_password,
+    'api_key_id'=>$api_key_id,
+    'api_key_secret'=>$api_key_secret,
+    'nextcloud_user'=>$nextcloud_user,
+    'nextcloud_password'=>$nextcloud_password,
+  ), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($secret_payload)) throw new RuntimeException('Connector-Zugangsdaten konnten nicht serialisiert werden.');
+  $secret_blob = bratonien_tools_nc_connector_encrypt_secret($secret_payload);
+
   $table=bratonien_tools_nc_connector_table(); bratonien_tools_nc_connector_ensure_table(); $now=date('Y-m-d H:i:s');
   $connection_key='local-'.bin2hex(random_bytes(12));
-  $secret_blob=bratonien_tools_nc_connector_encrypt_credentials((string)$_POST['nc_db_password'],$fallback_user,$fallback_password);
   $config_json=json_encode($config,JSON_UNESCAPED_UNICODE|JSON_UNESCAPED_SLASHES);
   if(!is_string($config_json)) throw new RuntimeException('Connector-Konfiguration konnte nicht serialisiert werden.');
 
@@ -90,6 +128,6 @@ function bratonien_tools_nc_connector_create_local_api_first()
 
   return array(
     'connection_id'=>$id,
-    'message'=>$fallback_user==='' ? 'Nextcloud-Verbindung wurde API-first ohne dauerhaft gespeicherten Benutzername/Passwort-Fallback angelegt. Bitte technisch pruefen und danach im LXC aktivieren.' : 'Nextcloud-Verbindung wurde API-first mit verschluesseltem Benutzername/Passwort-Fallback angelegt. Bitte technisch pruefen und danach im LXC aktivieren.'
+    'message'=>'Nextcloud-Verbindung wurde mit verbindungseigener Piwigo-Authentifizierung angelegt.'
   );
 }

include/nc_connector_delete_safe.inc.php

@@ -0,0 +1,135 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_connector_webdav_site_id(array $connection)
+{
+  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+  if ((string)($connection['adapter'] ?? '') !== 'remote') return 0;
+  if ((string)($config['source_mode'] ?? '') !== 'webdav-placeholder') return 0;
+
+  $gallery_root = rtrim((string)($config['parallel_gallery_root'] ?? ''), '/');
+  $piwigo_root = rtrim(PHPWG_ROOT_PATH, '/');
+  if ($gallery_root === '' || strpos($gallery_root, $piwigo_root.'/') !== 0) return 0;
+
+  $relative = ltrim(substr($gallery_root, strlen($piwigo_root)), '/');
+  if ($relative === '') return 0;
+  $site_url = './'.rtrim($relative, '/').'/';
+
+  $result = pwg_query(
+    "SELECT id FROM ".SITES_TABLE.
+    " WHERE galleries_url='".pwg_db_real_escape_string($site_url)."' LIMIT 1"
+  );
+  if (!pwg_db_num_rows($result)) return 0;
+
+  $row = pwg_db_fetch_assoc($result);
+  return (int)$row['id'];
+}
+
+function bratonien_tools_nc_connector_remove_webdav_piwigo_content(array $connection)
+{
+  $site_id = bratonien_tools_nc_connector_webdav_site_id($connection);
+  if ($site_id < 1) return array('site_id'=>0, 'images'=>0);
+
+  include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
+
+  $image_rows = array();
+  $query = '
+SELECT DISTINCT i.id, i.path, i.representative_ext
+  FROM '.IMAGES_TABLE.' AS i
+  LEFT JOIN '.CATEGORIES_TABLE.' AS sc ON sc.id = i.storage_category_id
+  LEFT JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON ic.image_id = i.id
+  LEFT JOIN '.CATEGORIES_TABLE.' AS vc ON vc.id = ic.category_id
+  WHERE sc.site_id = '.$site_id.' OR vc.site_id = '.$site_id.'
+;';
+  $result = pwg_query($query);
+  while ($row = pwg_db_fetch_assoc($result))
+  {
+    $row['id'] = (int)$row['id'];
+    $image_rows[$row['id']] = $row;
+  }
+
+  foreach ($image_rows as $row)
+  {
+    try
+    {
+      delete_element_derivatives($row);
+    }
+    catch (Throwable $e)
+    {
+      error_log('Bratonien WebDAV delete derivative cleanup #'.(int)$row['id'].': '.$e->getMessage());
+    }
+  }
+
+  delete_site($site_id);
+
+  if ($image_rows)
+  {
+    $ids = array_keys($image_rows);
+    $remaining = query2array(
+      'SELECT id FROM '.IMAGES_TABLE.' WHERE id IN ('.implode(',', array_map('intval', $ids)).')',
+      null,
+      'id'
+    );
+    if ($remaining)
+    {
+      delete_elements(array_map('intval', $remaining), false);
+    }
+  }
+
+  invalidate_user_cache(true);
+  return array('site_id'=>$site_id, 'images'=>count($image_rows));
+}
+
+/**
+ * Delete a connector connection from Piwigo without depending on the web
+ * server being allowed to write into root-owned runtime directories.
+ * WebDAV-managed Piwigo records are removed before the connection itself so
+ * deleted remote content cannot remain visible or addressable in Piwigo.
+ */
+function bratonien_tools_nc_connector_delete_safe()
+{
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $connection = bratonien_tools_nc_connector_connection($id, false);
+  if (!$connection)
+  {
+    throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
+  }
+
+  $cleanup = array('site_id'=>0, 'images'=>0);
+  if (
+    (string)($connection['adapter'] ?? '') === 'remote'
+    && (string)($connection['config']['source_mode'] ?? '') === 'webdav-placeholder'
+  )
+  {
+    $cleanup = bratonien_tools_nc_connector_remove_webdav_piwigo_content($connection);
+  }
+
+  $table = bratonien_tools_nc_connector_table();
+  pwg_query("DELETE FROM `$table` WHERE id=".$id." LIMIT 1");
+
+  $status_dir = rtrim(PHPWG_ROOT_PATH, '/').'/_data/bratonien-tools/nc-connector-status';
+  $public_status = $status_dir.'/connection-'.$id.'.json';
+  if (is_file($public_status))
+  {
+    @unlink($public_status);
+  }
+
+  if (is_dir($status_dir) || @mkdir($status_dir, 0755, true))
+  {
+    @file_put_contents($status_dir.'/deleted-'.$id, date('c')."\n", LOCK_EX);
+  }
+
+  if ((int)$cleanup['site_id'] > 0)
+  {
+    return array(
+      'message'=>'Connector-Verbindung wurde gelöscht. Die zugehörigen Piwigo-Alben und '.(int)$cleanup['images'].' Bilder wurden aus Piwigo entfernt. Nextcloud-Dateien blieben unverändert. Laufzeit- und Vorschaudaten werden automatisch bereinigt.',
+    );
+  }
+
+  return array(
+    'message'=>'Connector-Verbindung wurde gelöscht. Verbliebene Laufzeitdateien werden vor dem nächsten Connector-Lauf automatisch entfernt. Quelldateien blieben unverändert.',
+  );
+}

include/nc_connector_edit.inc.php

@@ -0,0 +1,338 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_connector_migration_state(array $connection)
+{
+  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
+  $missing = array();
+
+  if (trim((string)($config['nextcloud_url'] ?? '')) === '') $missing[] = 'Nextcloud-Adresse';
+  if (trim((string)($credentials['nextcloud_user'] ?? '')) === '') $missing[] = 'Nextcloud-Benutzer';
+  if ((string)($credentials['nextcloud_password'] ?? '') === '') $missing[] = 'Nextcloud-Passwort';
+  if (trim((string)($credentials['api_key_id'] ?? '')) === '') $missing[] = 'Piwigo-API-Schluessel-ID';
+  if (trim((string)($credentials['api_key_secret'] ?? '')) === '') $missing[] = 'Piwigo-API-Geheimnis';
+
+  return array(
+    'ready'=>!$missing,
+    'missing'=>$missing,
+  );
+}
+
+function bratonien_tools_nc_connector_validate_nextcloud_access($base_url, $username, $password)
+{
+  $base_url = bratonien_tools_nc_wizard_normalize_url($base_url);
+  $username = trim((string)$username);
+  $password = (string)$password;
+  if ($username === '' || $password === '') throw new RuntimeException('Nextcloud-Benutzer und Passwort werden benoetigt.');
+
+  $status_response = bratonien_tools_nc_wizard_http($base_url.'/status.php');
+  if ($status_response['status'] < 200 || $status_response['status'] >= 300)
+  {
+    throw new RuntimeException('Die Nextcloud-Adresse konnte nicht bestaetigt werden.');
+  }
+  $status = json_decode((string)$status_response['body'], true);
+  if (!is_array($status) || empty($status['installed']))
+  {
+    throw new RuntimeException('Unter dieser Adresse wurde keine installierte Nextcloud erkannt.');
+  }
+
+  $user_response = bratonien_tools_nc_wizard_http(
+    $base_url.'/ocs/v2.php/cloud/user?format=json',
+    $username,
+    $password,
+    array('OCS-APIRequest: true')
+  );
+  if ($user_response['status'] === 401 || $user_response['status'] === 403)
+  {
+    throw new RuntimeException('Nextcloud hat Benutzername oder Passwort abgelehnt.');
+  }
+  if ($user_response['status'] < 200 || $user_response['status'] >= 300)
+  {
+    throw new RuntimeException('Nextcloud ist erreichbar, aber der Benutzerzugang konnte nicht geprueft werden.');
+  }
+  $user_data = bratonien_tools_nc_wizard_ocs_data($user_response['body']);
+  $resolved = trim((string)($user_data['id'] ?? $username));
+
+  return array(
+    'base_url'=>$base_url,
+    'username'=>$resolved !== '' ? $resolved : $username,
+  );
+}
+
+function bratonien_tools_nc_connector_validate_scoped_api($api_key_id, $api_key_secret)
+{
+  $api_key_id = trim((string)$api_key_id);
+  $api_key_secret = trim((string)$api_key_secret);
+  if ($api_key_id === '' || $api_key_secret === '')
+  {
+    throw new RuntimeException('Piwigo-API-Schluessel-ID und API-Geheimnis werden benoetigt.');
+  }
+
+  $status = bratonien_tools_nc_connector_piwigo_api_request($api_key_id, $api_key_secret, 'pwg.session.getStatus');
+  if (!is_array($status)) throw new RuntimeException('Piwigo hat keinen auswertbaren API-Benutzerstatus geliefert.');
+  $role = strtolower(trim((string)($status['status'] ?? '')));
+  if (!in_array($role, array('admin','webmaster'), true))
+  {
+    throw new RuntimeException('Der API-Key funktioniert, gehoert aber keinem Piwigo-Administrator/Webmaster.');
+  }
+
+  $method_result = bratonien_tools_nc_connector_piwigo_api_request($api_key_id, $api_key_secret, 'reflection.getMethodList');
+  $method_map = array();
+  bratonien_tools_nc_connector_collect_method_names($method_result, $method_map);
+  $required = array('bratonien.nc.syncProductive', 'bratonien.nc.syncOrphans');
+  $missing = array_values(array_diff($required, array_keys($method_map)));
+  if ($missing)
+  {
+    throw new RuntimeException('Der API-Key ist gueltig, aber benoetigte Bratonien-Sync-Methoden fehlen: '.implode(', ', $missing).'.');
+  }
+}
+
+function bratonien_tools_nc_connector_prepare_webdav_wizard_from_connection(array $connection, $mode)
+{
+  $id = (int)$connection['id'];
+  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
+
+  $base_url = trim((string)($config['nextcloud_url'] ?? ''));
+  $username = trim((string)($credentials['nextcloud_user'] ?? ''));
+  if ($username === '')
+  {
+    $username = trim((string)($config['nextcloud_access_user'] ?? $config['access_user'] ?? ''));
+  }
+  $password = (string)($credentials['nextcloud_password'] ?? '');
+
+  $roots = isset($config['roots']) && is_array($config['roots']) ? array_values($config['roots']) : array();
+  $selected = array();
+  $selected_ids = array();
+  foreach ($roots as $root)
+  {
+    $path = trim((string)($root['webdav_path'] ?? ''), '/');
+    $fileid = (int)($root['fileid'] ?? 0);
+    if ($path === '' || $fileid < 1) continue;
+    $selected[] = $path;
+    $selected_ids[$path] = $fileid;
+  }
+
+  $state = bratonien_tools_nc_wizard_state();
+  $state = array_merge($state, array(
+    'editing_connection_id'=>$id,
+    'editing_adapter'=>(string)$connection['adapter'],
+    'editing_mode'=>(string)$mode,
+    'connection_name'=>(string)$connection['name'],
+    'host_input'=>$base_url,
+    'base_url'=>$base_url,
+    'username'=>$username,
+    '_password'=>$password,
+    '_fallback_user'=>(string)($credentials['piwigo_user'] ?? ''),
+    '_fallback_password'=>(string)($credentials['piwigo_password'] ?? ''),
+    '_api_key_id'=>(string)($credentials['api_key_id'] ?? ''),
+    '_api_key_secret'=>(string)($credentials['api_key_secret'] ?? ''),
+    'api_status'=>trim((string)($credentials['api_key_id'] ?? '')) !== '' && trim((string)($credentials['api_key_secret'] ?? '')) !== '' ? 'ok' : 'pending',
+    'roots'=>$roots,
+    'directory_selected'=>$selected,
+    'directory_selected_fileids'=>$selected_ids,
+    'source_mode'=>'webdav-placeholder',
+    'transport'=>'webdav',
+  ));
+
+  if ($base_url !== '' && $username !== '' && $password !== '')
+  {
+    $state['step'] = 2;
+    $state['scan_ok'] = true;
+    $state['technical_stage'] = 'mounts';
+    $state['technical_source'] = 'WebDAV';
+    $state['technical_error'] = '';
+    $state['technical_complete'] = false;
+    $state['directory_selection_ready'] = true;
+    $state['directory_path'] = '';
+    $state['directory_parent'] = '';
+    $state['directory_children'] = array();
+    $state['directory_current_fileid'] = 0;
+
+    try
+    {
+      bratonien_tools_nc_wizard_refresh_directory_state($state, '');
+    }
+    catch (Throwable $e)
+    {
+      $state['step'] = 1;
+      $state['scan_ok'] = false;
+      $state['technical_error'] = $e->getMessage();
+    }
+  }
+  else
+  {
+    $state['step'] = 1;
+    $state['scan_ok'] = false;
+  }
+
+  bratonien_tools_nc_wizard_store($state);
+}
+
+function bratonien_tools_nc_connector_edit_start()
+{
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $connection = bratonien_tools_nc_connector_connection($id, true);
+  if (!$connection) throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
+
+  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+  $is_webdav = (string)$connection['adapter'] === 'remote'
+    && (string)($config['source_mode'] ?? '') === 'webdav-placeholder';
+  if (!$is_webdav)
+  {
+    throw new RuntimeException('Diese Legacy-Verbindung wird direkt bearbeitet. Eine WebDAV-Migration ist eine separate Aktion.');
+  }
+
+  bratonien_tools_nc_connector_prepare_webdav_wizard_from_connection($connection, 'update');
+  return array('message'=>'Verbindung #'.$id.' wurde zum Bearbeiten geoeffnet.');
+}
+
+function bratonien_tools_nc_connector_migrate_start()
+{
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $connection = bratonien_tools_nc_connector_connection($id, true);
+  if (!$connection) throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
+  if ((string)$connection['adapter'] !== 'local')
+  {
+    throw new RuntimeException('Nur eine Legacy-Verbindung kann auf WebDAV migriert werden.');
+  }
+
+  $migration = bratonien_tools_nc_connector_migration_state($connection);
+  if (empty($migration['ready']))
+  {
+    throw new RuntimeException('Die WebDAV-Migration ist noch nicht bereit. Unter Bearbeiten fehlen: '.implode(', ', $migration['missing']).'.');
+  }
+
+  bratonien_tools_nc_connector_prepare_webdav_wizard_from_connection($connection, 'migrate');
+  return array('message'=>'Die WebDAV-Migration fuer Verbindung #'.$id.' wurde geoeffnet. Die bestehende Legacy-Verbindung bleibt bis zum erfolgreichen Umstieg unveraendert.');
+}
+
+function bratonien_tools_nc_connector_update_local_friendly()
+{
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $connection = bratonien_tools_nc_connector_connection($id, true);
+  if (!$connection) throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
+  if ((string)$connection['adapter'] !== 'local') throw new RuntimeException('Diese Bearbeitung ist nur fuer Legacy-Verbindungen vorgesehen.');
+
+  $name = trim((string)($_POST['connection_name'] ?? ''));
+  if ($name === '') throw new RuntimeException('Bitte einen Namen fuer die Verbindung angeben.');
+
+  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+  $host = trim((string)($_POST['nc_host'] ?? ''));
+  $port = (int)($_POST['nc_port'] ?? 5432);
+  $database = trim((string)($_POST['nc_database'] ?? ''));
+  $user = trim((string)($_POST['nc_user'] ?? ''));
+  $gallery_root = rtrim(trim((string)($_POST['nc_gallery_root'] ?? '')), '/');
+  $source_view = trim((string)($_POST['nc_source_view'] ?? ''));
+  $activity_view = trim((string)($_POST['nc_activity_view'] ?? ''));
+
+  if ($host === '') throw new RuntimeException('Datenbank-Server fehlt.');
+  if ($port < 1 || $port > 65535) throw new RuntimeException('Der Datenbank-Port ist ungueltig.');
+  if ($database === '') throw new RuntimeException('Datenbankname fehlt.');
+  if ($user === '') throw new RuntimeException('Reader-Benutzer fehlt.');
+  if ($gallery_root === '' || $gallery_root[0] !== '/') throw new RuntimeException('Der Piwigo-Galerieordner muss ein absoluter Pfad sein.');
+  if ($source_view === '' || $activity_view === '') throw new RuntimeException('Die gespeicherten Datenbankansichten duerfen nicht leer sein.');
+  bratonien_tools_nc_connector_view_name($source_view);
+  bratonien_tools_nc_connector_view_name($activity_view);
+
+  $storage_ids = isset($_POST['nc_storage_id']) && is_array($_POST['nc_storage_id']) ? $_POST['nc_storage_id'] : array();
+  $storage_prefixes = isset($_POST['nc_source_prefix']) && is_array($_POST['nc_source_prefix']) ? $_POST['nc_source_prefix'] : array();
+  $storage_mounts = isset($_POST['nc_local_mount']) && is_array($_POST['nc_local_mount']) ? $_POST['nc_local_mount'] : array();
+  $storages = array();
+  $count = max(count($storage_ids), count($storage_prefixes), count($storage_mounts));
+  for ($index = 0; $index < $count; $index++)
+  {
+    $storage_id = trim((string)($storage_ids[$index] ?? ''));
+    $prefix = trim((string)($storage_prefixes[$index] ?? ''), '/');
+    $mount = rtrim(trim((string)($storage_mounts[$index] ?? '')), '/');
+    if ($storage_id === '' && $prefix === '' && $mount === '') continue;
+    if ($storage_id === '') throw new RuntimeException('Bei einem Speicherort fehlt die Storage-ID.');
+    if ($mount === '' || $mount[0] !== '/') throw new RuntimeException('Bei einem Speicherort fehlt ein gueltiger lokaler Pfad.');
+    $storages[] = array('storage_id'=>$storage_id, 'source_prefix'=>$prefix, 'local_mount'=>$mount);
+  }
+  if (!$storages) throw new RuntimeException('Mindestens ein Speicherort muss vorhanden sein.');
+
+  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
+  $new_db_password = (string)($_POST['nc_db_password'] ?? '');
+  if ($new_db_password !== '') $credentials['db_password'] = $new_db_password;
+  if (trim((string)($credentials['db_password'] ?? '')) === '') throw new RuntimeException('Fuer die Legacy-Verbindung ist kein Datenbankpasswort gespeichert.');
+
+  $nextcloud_url = trim((string)($_POST['nc_nextcloud_url'] ?? ($config['nextcloud_url'] ?? '')));
+  $nextcloud_user = trim((string)($_POST['nc_nextcloud_user'] ?? ($credentials['nextcloud_user'] ?? '')));
+  $new_nextcloud_password = (string)($_POST['nc_nextcloud_password'] ?? '');
+  if ($new_nextcloud_password !== '') $credentials['nextcloud_password'] = $new_nextcloud_password;
+  $nextcloud_password = (string)($credentials['nextcloud_password'] ?? '');
+
+  $api_key_id = trim((string)($_POST['nc_connection_api_key_id'] ?? ($credentials['api_key_id'] ?? '')));
+  $new_api_secret = trim((string)($_POST['nc_connection_api_key_secret'] ?? ''));
+  $old_api_id = trim((string)($credentials['api_key_id'] ?? ''));
+  if ($api_key_id !== $old_api_id && $new_api_secret === '')
+  {
+    throw new RuntimeException('Wenn die API-Schluessel-ID geaendert wird, muss auch das API-Geheimnis neu eingegeben werden.');
+  }
+  if ($new_api_secret !== '') $credentials['api_key_secret'] = $new_api_secret;
+  $api_key_secret = trim((string)($credentials['api_key_secret'] ?? ''));
+
+  if (($nextcloud_url === '' || $nextcloud_user === '' || $nextcloud_password === '') && ($nextcloud_url !== '' || $nextcloud_user !== '' || $nextcloud_password !== ''))
+  {
+    throw new RuntimeException('Nextcloud-Adresse, Nextcloud-Benutzer und Nextcloud-Passwort muessen fuer WebDAV gemeinsam vollstaendig sein.');
+  }
+  if (($api_key_id === '') !== ($api_key_secret === ''))
+  {
+    throw new RuntimeException('Piwigo-API-Schluessel-ID und API-Geheimnis muessen gemeinsam vollstaendig sein.');
+  }
+
+  if ($nextcloud_url !== '')
+  {
+    $validated_nc = bratonien_tools_nc_connector_validate_nextcloud_access($nextcloud_url, $nextcloud_user, $nextcloud_password);
+    $nextcloud_url = $validated_nc['base_url'];
+    $nextcloud_user = $validated_nc['username'];
+    $credentials['nextcloud_user'] = $nextcloud_user;
+  }
+  if ($api_key_id !== '')
+  {
+    bratonien_tools_nc_connector_validate_scoped_api($api_key_id, $api_key_secret);
+    $credentials['api_key_id'] = $api_key_id;
+  }
+
+  $config['host'] = $host;
+  $config['port'] = (string)$port;
+  $config['database'] = $database;
+  $config['user'] = $user;
+  $config['source_view'] = $source_view;
+  $config['activity_view'] = $activity_view;
+  $config['gallery_root'] = $gallery_root;
+  $config['quiet_seconds'] = max(0, (int)($_POST['nc_quiet_seconds'] ?? ($config['quiet_seconds'] ?? 120)));
+  $config['max_wait_seconds'] = max(60, (int)($_POST['nc_max_wait_seconds'] ?? ($config['max_wait_seconds'] ?? 900)));
+  $config['full_sync_seconds'] = max(300, (int)($_POST['nc_full_sync_seconds'] ?? ($config['full_sync_seconds'] ?? 86400)));
+  $config['storages'] = $storages;
+  if ($nextcloud_url !== '')
+  {
+    $config['nextcloud_url'] = $nextcloud_url;
+    $config['access_user'] = $nextcloud_user;
+    $config['nextcloud_access_user'] = $nextcloud_user;
+  }
+  $config['piwigo_auth'] = 'connection-scoped';
+  $config['api_enabled'] = $api_key_id !== '' && $api_key_secret !== '';
+  unset($config['verification']);
+
+  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($config_json)) throw new RuntimeException('Connector-Konfiguration konnte nicht serialisiert werden.');
+  $secret_payload = json_encode($credentials, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($secret_payload)) throw new RuntimeException('Connector-Zugangsdaten konnten nicht serialisiert werden.');
+  $secret_blob = bratonien_tools_nc_connector_encrypt_secret($secret_payload);
+
+  $table = bratonien_tools_nc_connector_table();
+  $now = date('Y-m-d H:i:s');
+  pwg_query("UPDATE `$table` SET name='".pwg_db_real_escape_string($name)."', config_json='".pwg_db_real_escape_string($config_json)."', secret_blob='".pwg_db_real_escape_string($secret_blob)."', updated='".pwg_db_real_escape_string($now)."' WHERE id=".$id." LIMIT 1");
+
+  $updated = bratonien_tools_nc_connector_connection($id, true);
+  $migration = $updated ? bratonien_tools_nc_connector_migration_state($updated) : array('ready'=>false);
+  return array(
+    'message'=>'Verbindung #'.$id.' wurde gespeichert. '.(!empty($migration['ready']) ? 'Die WebDAV-Migration ist jetzt bereit.' : 'Die WebDAV-Migration ist noch nicht vollstaendig vorbereitet.'),
+  );
+}

include/nc_connector_generic_scope.inc.php

@@ -0,0 +1,101 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_wizard_finish_generic_scope()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((int)($state['step'] ?? 0) !== 4 || empty($state['technical_complete']) || trim((string)($state['username'] ?? '')) === '')
+  {
+    throw new RuntimeException('Der Assistent ist noch nicht vollständig.');
+  }
+
+  $roots = isset($state['roots']) && is_array($state['roots']) ? $state['roots'] : array();
+  $storages = isset($state['storages']) && is_array($state['storages']) ? $state['storages'] : array();
+  if (!$roots) throw new RuntimeException('Es wurden keine Nextcloud-Quellen ausgewählt.');
+  if (!$storages) throw new RuntimeException('Es wurden keine Storage-Adapter zugeordnet.');
+
+  if (array_key_exists('nc_wizard_fallback_user', $_POST)) $state['_fallback_user'] = trim((string)$_POST['nc_wizard_fallback_user']);
+  if (array_key_exists('nc_wizard_fallback_password', $_POST)) $state['_fallback_password'] = (string)$_POST['nc_wizard_fallback_password'];
+  bratonien_tools_nc_wizard_store($state);
+
+  $fallback_user = trim((string)$state['_fallback_user']);
+  $fallback_password = (string)$state['_fallback_password'];
+  if (($fallback_user === '') !== ($fallback_password === '')) throw new RuntimeException('Fallback-Benutzer und Fallback-Passwort müssen entweder beide angegeben oder beide leer gelassen werden.');
+  if (($state['api_status'] ?? '') !== 'ok' && $fallback_user === '') throw new RuntimeException('Da die Piwigo-API übersprungen wurde, ist für diese Verbindung ein Fallback-Zugang erforderlich.');
+
+  $mapping_lines = array();
+  foreach ($storages as $storage)
+  {
+    $storage_id = trim((string)($storage['storage_id'] ?? ''));
+    $source_prefix = trim((string)($storage['source_prefix'] ?? ''), '/');
+    $local_mount = rtrim(trim((string)($storage['local_mount'] ?? '')), '/');
+    if ($storage_id === '' || $local_mount === '') throw new RuntimeException('Eine Storage-Zuordnung ist unvollständig.');
+    $key = $storage_id.'|'.$source_prefix.'|'.$local_mount;
+    $mapping_lines[$key] = $storage_id.' | '.$source_prefix.' | '.$local_mount;
+  }
+
+  $_POST['nc_name']=(string)$state['connection_name'];
+  $_POST['nc_host']=(string)$state['db_host'];
+  $_POST['nc_port']=(string)$state['db_port'];
+  $_POST['nc_database']=(string)$state['db_database'];
+  $_POST['nc_user']=(string)$state['db_user'];
+  $_POST['nc_db_password']=(string)$state['_db_password'];
+  $_POST['nc_source_view']='piwigo_connector_files';
+  $_POST['nc_activity_view']='piwigo_connector_activity';
+  $_POST['nc_gallery_root']=(string)$state['gallery_root'];
+  $_POST['nc_storages']=implode("\n", array_values($mapping_lines));
+  $_POST['nc_quiet_seconds']='120';
+  $_POST['nc_max_wait_seconds']='900';
+  $_POST['nc_full_sync_seconds']='86400';
+  $_POST['nc_piwigo_user']=$fallback_user;
+  $_POST['nc_piwigo_password']=$fallback_password;
+  $_POST['nc_nextcloud_url']=(string)$state['base_url'];
+  $_POST['nc_access_user']=(string)$state['username'];
+  $_POST['nc_nextcloud_user']=(string)$state['username'];
+  $_POST['nc_nextcloud_password']=(string)$state['_password'];
+  $_POST['nc_product']=(string)$state['product'];
+  $_POST['nc_version']=(string)$state['version'];
+  $_POST['nc_api_validated']=($state['api_status'] ?? '')==='ok'?'1':'0';
+  $_POST['nc_connection_api_key_id']=($state['api_status'] ?? '')==='ok'?(string)$state['_api_key_id']:'';
+  $_POST['nc_connection_api_key_secret']=($state['api_status'] ?? '')==='ok'?(string)$state['_api_key_secret']:'';
+
+  $result = bratonien_tools_nc_connector_create_local_api_first();
+  $connection_id = (int)($result['connection_id'] ?? 0);
+  if ($connection_id < 1) throw new RuntimeException('Die neue Verbindung konnte nicht gespeichert werden.');
+
+  $connection = bratonien_tools_nc_connector_connection($connection_id, false);
+  if (!$connection) throw new RuntimeException('Die neue Verbindung konnte nach dem Anlegen nicht gelesen werden.');
+  $config = is_array($connection['config'] ?? null) ? $connection['config'] : array();
+  $config['source_mode'] = 'selected-fileids';
+  $config['source_view'] = 'piwigo_connector_files';
+  $config['activity_view'] = 'piwigo_connector_activity';
+  $config['access_user'] = (string)$state['username'];
+  $config['nextcloud_access_user'] = (string)$state['username'];
+  $config['storages'] = array_values($storages);
+  $config['roots'] = array_values(array_map(function($root) {
+    return array(
+      'fileid'=>(int)($root['fileid'] ?? 0),
+      'display_name'=>(string)($root['display_name'] ?? ''),
+      'webdav_path'=>(string)($root['webdav_path'] ?? ''),
+    );
+  }, $roots));
+  unset($config['showcase_user']);
+
+  foreach ($config['roots'] as $root)
+  {
+    if ((int)$root['fileid'] < 1 || trim((string)$root['display_name']) === '') throw new RuntimeException('Eine ausgewählte Nextcloud-Quelle ist unvollständig.');
+  }
+
+  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($config_json)) throw new RuntimeException('Die Quellenkonfiguration konnte nicht serialisiert werden.');
+  $table = bratonien_tools_nc_connector_table();
+  pwg_query("UPDATE `$table` SET config_json='".pwg_db_real_escape_string($config_json)."' WHERE id=".$connection_id." LIMIT 1");
+
+  unset($_SESSION['bratonien_nc_wizard']);
+  unset($result['connection_id']);
+  $result['message'] = 'Verbindung wurde mit generischer Nextcloud-Quellenauswahl angelegt. '.$result['message'];
+  return $result;
+}

include/nc_connector_piwigo_api.inc.php

@@ -179,6 +179,76 @@ function bratonien_tools_nc_connector_piwigo_api_request($api_key_id, $api_key_s
   return bratonien_tools_nc_connector_api_payload($decoded);
 }
 
+function bratonien_tools_nc_connector_validate_fallback_credentials($username, $password)
+{
+  if (!function_exists('curl_init'))
+  {
+    throw new RuntimeException('cURL ist in PHP nicht verfuegbar. Der Piwigo-Fallback kann nicht geprueft werden.');
+  }
+
+  $username = trim((string)$username);
+  $password = (string)$password;
+  if ($username === '' || $password === '')
+  {
+    throw new RuntimeException('Piwigo-Benutzername und Passwort muessen angegeben werden.');
+  }
+
+  $cookie_file = tempnam(sys_get_temp_dir(), 'br-pwg-auth-');
+  if ($cookie_file === false)
+  {
+    throw new RuntimeException('Temporare Piwigo-Sitzung konnte nicht angelegt werden.');
+  }
+
+  try
+  {
+    $url = rtrim(get_absolute_root_url(true), '/').'/ws.php?format=json';
+    $request = function(array $fields) use ($url, $cookie_file)
+    {
+      $ch = curl_init($url);
+      curl_setopt_array($ch, array(
+        CURLOPT_RETURNTRANSFER=>true,
+        CURLOPT_POST=>true,
+        CURLOPT_POSTFIELDS=>http_build_query($fields),
+        CURLOPT_COOKIEJAR=>$cookie_file,
+        CURLOPT_COOKIEFILE=>$cookie_file,
+        CURLOPT_CONNECTTIMEOUT=>10,
+        CURLOPT_TIMEOUT=>20,
+        CURLOPT_FOLLOWLOCATION=>false,
+        CURLOPT_USERAGENT=>'Bratonien-Tools-NC-Connector/'.(function_exists('bratonien_tools_current_version') ? bratonien_tools_current_version() : 'dev'),
+      ));
+      $body = curl_exec($ch);
+      $errno = curl_errno($ch);
+      $error = curl_error($ch);
+      $http = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+      $type = (string)curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
+      curl_close($ch);
+      if ($body === false || $errno !== 0) throw new RuntimeException('Piwigo-Fallback konnte nicht geprueft werden: '.$error);
+      if ($http < 200 || $http >= 300) throw new RuntimeException('Piwigo-Fallback-Pruefung antwortete mit HTTP '.$http.'.');
+      $decoded = bratonien_tools_nc_connector_decode_api_response((string)$body, $type);
+      if (($decoded['stat'] ?? '') !== 'ok')
+      {
+        $message = trim((string)($decoded['message'] ?? $decoded['err'] ?? 'Piwigo hat die Anmeldung abgelehnt.'));
+        throw new RuntimeException($message !== '' ? $message : 'Piwigo hat die Anmeldung abgelehnt.');
+      }
+      return bratonien_tools_nc_connector_api_payload($decoded);
+    };
+
+    $request(array('method'=>'pwg.session.login', 'username'=>$username, 'password'=>$password));
+    $status = $request(array('method'=>'pwg.session.getStatus'));
+    if (!is_array($status)) throw new RuntimeException('Piwigo hat keinen auswertbaren Benutzerstatus geliefert.');
+    $role = strtolower(trim((string)($status['status'] ?? '')));
+    if (!in_array($role, array('admin','webmaster'), true))
+    {
+      throw new RuntimeException('Der Piwigo-Fallback funktioniert, gehoert aber keinem Administrator/Webmaster.');
+    }
+    return array('username'=>(string)($status['username'] ?? $username), 'status'=>$role);
+  }
+  finally
+  {
+    @unlink($cookie_file);
+  }
+}
+
 function bratonien_tools_nc_connector_piwigo_api_test()
 {
   $api_key_id = trim((string)($_POST['nc_piwigo_api_key_id'] ?? ''));

include/nc_connector_webdav.inc.php

@@ -0,0 +1,261 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+/**
+ * Return the only existing local connector as migration fallback.
+ */
+function bratonien_tools_nc_connector_single_local_fallback()
+{
+  bratonien_tools_nc_connector_ensure_table();
+  $table = bratonien_tools_nc_connector_table();
+  $result = pwg_query("SELECT id, enabled, takeover_state, config_json FROM `$table` WHERE adapter='local' ORDER BY id");
+  $rows = array();
+
+  while ($row = pwg_db_fetch_assoc($result))
+  {
+    $rows[] = $row;
+    if (count($rows) > 1) return null;
+  }
+
+  if (count($rows) !== 1) return null;
+
+  $row = $rows[0];
+  $config = json_decode((string)$row['config_json'], true);
+  if (!is_array($config)) $config = array();
+
+  return array(
+    'id'=>(int)$row['id'],
+    'enabled'=>(bool)$row['enabled'],
+    'takeover_state'=>(string)$row['takeover_state'],
+    'config'=>$config,
+  );
+}
+
+/**
+ * Link a WebDAV connection with the single existing local fallback.
+ */
+function bratonien_tools_nc_connector_pair_migration_fallback($webdav_id, array &$webdav_config, $now)
+{
+  $legacy = bratonien_tools_nc_connector_single_local_fallback();
+  if (!$legacy) return null;
+
+  $legacy_id = (int)$legacy['id'];
+  if ($legacy_id < 1 || $legacy_id === (int)$webdav_id) return null;
+
+  $webdav_config['migration'] = array(
+    'role'=>'webdav-primary-candidate',
+    'legacy_fallback_connection_id'=>$legacy_id,
+    'fallback_policy'=>'keep-running',
+    'paired_at'=>(string)$now,
+    'cutover_state'=>'parallel',
+  );
+
+  $legacy_config = $legacy['config'];
+  $legacy_config['migration'] = array(
+    'role'=>'legacy-fallback',
+    'webdav_successor_connection_id'=>(int)$webdav_id,
+    'fallback_policy'=>'keep-running',
+    'paired_at'=>(string)$now,
+    'cutover_state'=>'parallel',
+  );
+
+  $legacy_json = json_encode($legacy_config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($legacy_json))
+  {
+    throw new RuntimeException('Die bestehende Verbindung konnte nicht als Migrations-Fallback markiert werden.');
+  }
+
+  $table = bratonien_tools_nc_connector_table();
+  pwg_query("UPDATE `$table` SET config_json='".pwg_db_real_escape_string($legacy_json)."', updated='".pwg_db_real_escape_string((string)$now)."' WHERE id=".$legacy_id." LIMIT 1");
+
+  return $legacy_id;
+}
+
+/**
+ * Create or update a WebDAV-backed connector from the user-facing wizard.
+ *
+ * Remote connections are updated in place. When the editor was opened for a
+ * legacy connection, a WebDAV successor is created and the legacy connection
+ * stays available as fallback.
+ */
+function bratonien_tools_nc_connector_create_webdav_placeholder_from_wizard()
+{
+  $state = bratonien_tools_nc_wizard_state();
+
+  if (empty($state['scan_ok']) || empty($state['technical_complete']))
+  {
+    throw new RuntimeException('Die WebDAV-Verbindung wurde im Assistenten noch nicht vollständig vorbereitet.');
+  }
+
+  $base_url = rtrim(trim((string)($state['base_url'] ?? '')), '/');
+  $username = trim((string)($state['username'] ?? ''));
+  $password = (string)($state['_password'] ?? '');
+  if ($base_url === '' || $username === '' || $password === '')
+  {
+    throw new RuntimeException('Für den WebDAV-Zugang fehlen Nextcloud-Adresse oder Zugangsdaten.');
+  }
+
+  $selected = isset($state['directory_selected']) && is_array($state['directory_selected'])
+    ? array_values(array_unique(array_map(function($path) { return trim((string)$path, '/'); }, $state['directory_selected'])))
+    : array();
+  $selected_ids = isset($state['directory_selected_fileids']) && is_array($state['directory_selected_fileids'])
+    ? $state['directory_selected_fileids']
+    : array();
+  $selected = array_values(array_filter($selected, function($path) { return $path !== ''; }));
+  if (!$selected) throw new RuntimeException('Bitte mindestens ein Nextcloud-Verzeichnis auswählen.');
+
+  $roots = array();
+  foreach ($selected as $path)
+  {
+    $fileid = isset($selected_ids[$path]) ? (int)$selected_ids[$path] : 0;
+    if ($fileid < 1) throw new RuntimeException('Für ein ausgewähltes Nextcloud-Verzeichnis fehlt die eindeutige Datei-ID.');
+    $roots[] = array(
+      'fileid'=>$fileid,
+      'display_name'=>basename($path),
+      'webdav_path'=>$path,
+    );
+  }
+
+  $name = trim((string)($state['connection_name'] ?? ''));
+  if ($name === '') $name = 'Nextcloud WebDAV';
+  $gallery_root = rtrim(trim((string)($state['gallery_root'] ?? '')), '/');
+  if ($gallery_root === '') $gallery_root = rtrim(PHPWG_ROOT_PATH, '/').'/galleries';
+
+  $api_key_id = ($state['api_status'] ?? '') === 'ok' ? trim((string)($state['_api_key_id'] ?? '')) : '';
+  $api_key_secret = ($state['api_status'] ?? '') === 'ok' ? trim((string)($state['_api_key_secret'] ?? '')) : '';
+  $fallback_user = trim((string)($state['_fallback_user'] ?? ''));
+  $fallback_password = (string)($state['_fallback_password'] ?? '');
+  $api_enabled = $api_key_id !== '' && $api_key_secret !== '';
+
+  $editing_id = (int)($state['editing_connection_id'] ?? 0);
+  $editing_mode = (string)($state['editing_mode'] ?? '');
+  $editing_connection = $editing_id > 0 ? bratonien_tools_nc_connector_connection($editing_id, false) : null;
+  $editing_remote = $editing_connection
+    && (string)$editing_connection['adapter'] === 'remote'
+    && (string)($editing_connection['config']['source_mode'] ?? '') === 'webdav-placeholder'
+    && $editing_mode === 'update';
+
+  $config = array(
+    'origin'=>'native',
+    'source_mode'=>'webdav-placeholder',
+    'transport'=>'webdav',
+    'nextcloud_url'=>$base_url,
+    'access_user'=>$username,
+    'nextcloud_access_user'=>$username,
+    'gallery_root'=>$gallery_root,
+    'roots'=>$roots,
+    'state_dir'=>'',
+    'status_file'=>'',
+    'quiet_seconds'=>120,
+    'max_wait_seconds'=>900,
+    'full_sync_seconds'=>86400,
+    'parallel_test'=>true,
+    'piwigo_auth'=>'connection-scoped',
+    'api_enabled'=>$api_enabled,
+  );
+
+  if ($editing_remote)
+  {
+    $old_config = is_array($editing_connection['config'] ?? null) ? $editing_connection['config'] : array();
+    foreach (array('state_dir','status_file','parallel_gallery_root','source_fingerprint','runtime','migration') as $preserve)
+    {
+      if (array_key_exists($preserve, $old_config)) $config[$preserve] = $old_config[$preserve];
+    }
+    foreach (array('quiet_seconds','max_wait_seconds','full_sync_seconds') as $preserve)
+    {
+      if (isset($old_config[$preserve])) $config[$preserve] = (int)$old_config[$preserve];
+    }
+  }
+
+  foreach (array('product'=>'nextcloud_product', 'version'=>'nextcloud_version') as $state_key=>$config_key)
+  {
+    $value = trim((string)($state[$state_key] ?? ''));
+    if ($value !== '') $config[$config_key] = $value;
+  }
+
+  $secret_payload = json_encode(array(
+    'v'=>3,
+    'db_password'=>'',
+    'piwigo_user'=>$fallback_user,
+    'piwigo_password'=>$fallback_password,
+    'api_key_id'=>$api_key_id,
+    'api_key_secret'=>$api_key_secret,
+    'nextcloud_user'=>$username,
+    'nextcloud_password'=>$password,
+  ), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($secret_payload)) throw new RuntimeException('WebDAV-Zugangsdaten konnten nicht serialisiert werden.');
+
+  bratonien_tools_nc_connector_ensure_table();
+  $table = bratonien_tools_nc_connector_table();
+  $now = date('Y-m-d H:i:s');
+  $secret_blob = bratonien_tools_nc_connector_encrypt_secret($secret_payload);
+
+  if ($editing_remote)
+  {
+    $config['state_dir'] = trim((string)($config['state_dir'] ?? '')) !== '' ? $config['state_dir'] : '/var/lib/bratonien-tools/nc-connector/connection-'.$editing_id;
+    $config['status_file'] = trim((string)($config['status_file'] ?? '')) !== '' ? $config['status_file'] : $config['state_dir'].'/connector-status.json';
+    $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    if (!is_string($config_json)) throw new RuntimeException('WebDAV-Konfiguration konnte nicht serialisiert werden.');
+
+    pwg_query("UPDATE `$table` SET name='".pwg_db_real_escape_string($name)."', config_json='".pwg_db_real_escape_string($config_json)."', secret_blob='".pwg_db_real_escape_string($secret_blob)."', updated='".pwg_db_real_escape_string($now)."' WHERE id=".$editing_id." LIMIT 1");
+    unset($_SESSION['bratonien_nc_wizard']);
+
+    return array(
+      'connection_id'=>$editing_id,
+      'message'=>'WebDAV-Verbindung #'.$editing_id.' wurde gespeichert. Der nächste Connector-Lauf verwendet die neuen Einstellungen.',
+    );
+  }
+
+  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($config_json)) throw new RuntimeException('WebDAV-Konfiguration konnte nicht serialisiert werden.');
+
+  $connection_key = 'webdav-'.bin2hex(random_bytes(12));
+  pwg_query("INSERT INTO `$table` (connection_key,name,adapter,enabled,takeover_state,config_json,secret_blob,created,updated) VALUES ('"
+    .pwg_db_real_escape_string($connection_key)."','"
+    .pwg_db_real_escape_string($name)."','remote',0,'disabled','"
+    .pwg_db_real_escape_string($config_json)."','"
+    .pwg_db_real_escape_string($secret_blob)."','"
+    .pwg_db_real_escape_string($now)."','"
+    .pwg_db_real_escape_string($now)."')");
+
+  $id = (int)pwg_db_insert_id();
+  if ($id < 1) throw new RuntimeException('Die WebDAV-Verbindung konnte nicht eindeutig angelegt werden.');
+
+  try
+  {
+    $config['state_dir'] = '/var/lib/bratonien-tools/nc-connector/connection-'.$id;
+    $config['status_file'] = $config['state_dir'].'/connector-status.json';
+    $legacy_fallback_id = bratonien_tools_nc_connector_pair_migration_fallback($id, $config, $now);
+
+    $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    if (!is_string($config_json))
+    {
+      throw new RuntimeException('Die WebDAV-Verbindung konnte nach dem Anlegen nicht serialisiert werden.');
+    }
+    pwg_query("UPDATE `$table` SET config_json='".pwg_db_real_escape_string($config_json)."' WHERE id=".$id." LIMIT 1");
+  }
+  catch (Throwable $e)
+  {
+    pwg_query("DELETE FROM `$table` WHERE id=".$id." LIMIT 1");
+    throw $e;
+  }
+
+  unset($_SESSION['bratonien_nc_wizard']);
+
+  if ($legacy_fallback_id !== null)
+  {
+    return array(
+      'connection_id'=>$id,
+      'legacy_fallback_connection_id'=>$legacy_fallback_id,
+      'message'=>'WebDAV-Nachfolger wurde angelegt. Die bestehende lokale Verbindung #'.$legacy_fallback_id.' bleibt als Fallback erhalten.',
+    );
+  }
+
+  return array(
+    'connection_id'=>$id,
+    'message'=>'WebDAV-Verbindung wurde angelegt.',
+  );
+}

include/nc_connector_wizard.inc.php

@@ -7,32 +7,74 @@ if (!defined('PHPWG_ROOT_PATH'))
 function bratonien_tools_nc_wizard_state()
 {
   $state = isset($_SESSION['bratonien_nc_wizard']) && is_array($_SESSION['bratonien_nc_wizard']) ? $_SESSION['bratonien_nc_wizard'] : array();
+
   return array_merge(array(
-    'step'=>1,'scan_ok'=>false,'base_url'=>'','host_input'=>'','username'=>'','display_name'=>'','version'=>'','product'=>'Nextcloud',
+    'step'=>1,
-    'users'=>array(),'can_list_users'=>false,'showcase_user'=>'','connection_name'=>'','scan_message'=>'',
+    'scan_ok'=>false,
-    'technical_stage'=>'reader_credentials','technical_source'=>'Noch nicht geprüft','technical_error'=>'','technical_complete'=>false,
+    'base_url'=>'',
-    'db_host'=>'','db_port'=>'5432','db_database'=>'nextcloud','db_user'=>'','db_password_set'=>false,
+    'host_input'=>'',
-    'source_view'=>'piwigo_showcase_sources','activity_view'=>'piwigo_showcase_activity','gallery_root'=>'','storages'=>array(),'storage_candidates'=>array(),
+    'username'=>'',
-    'api_status'=>'pending','api_username'=>'','api_error'=>'','_password'=>'','_db_password'=>'','_api_key_id'=>'','_api_key_secret'=>'',
+    'display_name'=>'',
-    '_fallback_user'=>'','_fallback_password'=>'',
+    'version'=>'',
+    'product'=>'Nextcloud',
+    'users'=>array(),
+    'can_list_users'=>false,
+    'showcase_user'=>'',
+    'connection_name'=>'',
+    'scan_message'=>'',
+    'technical_stage'=>'auto_check',
+    'technical_source'=>'Noch nicht geprüft',
+    'technical_error'=>'',
+    'technical_complete'=>false,
+    'db_host'=>'',
+    'db_port'=>'5432',
+    'db_database'=>'nextcloud',
+    'db_user'=>'',
+    'db_password_set'=>false,
+    'source_view'=>'piwigo_showcase_sources',
+    'activity_view'=>'piwigo_showcase_activity',
+    'gallery_root'=>'',
+    'storages'=>array(),
+    'storage_candidates'=>array(),
+    'api_status'=>'pending',
+    'api_username'=>'',
+    'api_error'=>'',
+    '_password'=>'',
+    '_db_password'=>'',
+    '_api_key_id'=>'',
+    '_api_key_secret'=>'',
+    '_fallback_user'=>'',
+    '_fallback_password'=>'',
   ), $state);
 }
 
-function bratonien_tools_nc_wizard_store(array $state) { $_SESSION['bratonien_nc_wizard'] = $state; }
+function bratonien_tools_nc_wizard_store(array $state)
-function bratonien_tools_nc_wizard_reset() { unset($_SESSION['bratonien_nc_wizard']); return array('message'=>'Verbindungsassistent wurde zurückgesetzt.'); }
+{
+  $_SESSION['bratonien_nc_wizard'] = $state;
+}
+
+function bratonien_tools_nc_wizard_reset()
+{
+  unset($_SESSION['bratonien_nc_wizard']);
+  return array('message'=>'Verbindungsassistent wurde zurückgesetzt.');
+}
 
 function bratonien_tools_nc_wizard_normalize_url($host)
 {
   $host = trim((string)$host);
   if ($host === '') throw new RuntimeException('Nextcloud-Adresse fehlt.');
   if (!preg_match('#^https?://#i', $host)) $host = 'https://'.$host;
+
   $parts = parse_url($host);
   if (!is_array($parts) || empty($parts['host'])) throw new RuntimeException('Die Nextcloud-Adresse ist ungültig.');
+
   $scheme = strtolower((string)($parts['scheme'] ?? 'https'));
   if (!in_array($scheme, array('http','https'), true)) throw new RuntimeException('Nextcloud muss per HTTP oder HTTPS erreichbar sein.');
+
   $url = $scheme.'://'.$parts['host'];
   if (!empty($parts['port'])) $url .= ':'.(int)$parts['port'];
   if (!empty($parts['path']) && $parts['path'] !== '/') $url .= '/'.trim($parts['path'], '/');
+
   return rtrim($url, '/');
 }
 
@@ -41,22 +83,42 @@ function bratonien_tools_nc_wizard_candidate_urls($host)
   $host = trim((string)$host);
   if ($host === '') throw new RuntimeException('Bitte die Adresse der Nextcloud angeben.');
   if (preg_match('#^https?://#i', $host)) return array(bratonien_tools_nc_wizard_normalize_url($host));
-  return array(bratonien_tools_nc_wizard_normalize_url('https://'.$host),bratonien_tools_nc_wizard_normalize_url('http://'.$host));
+
+  return array(
+    bratonien_tools_nc_wizard_normalize_url('https://'.$host),
+    bratonien_tools_nc_wizard_normalize_url('http://'.$host),
+  );
 }
 
 function bratonien_tools_nc_wizard_http($url, $username = '', $password = '', array $headers = array())
 {
   if (!function_exists('curl_init')) throw new RuntimeException('Der Server kann Nextcloud derzeit nicht per HTTP prüfen.');
+
   $ch = curl_init($url);
   $options = array(
-    CURLOPT_RETURNTRANSFER=>true,CURLOPT_FOLLOWLOCATION=>true,CURLOPT_MAXREDIRS=>3,CURLOPT_CONNECTTIMEOUT=>8,CURLOPT_TIMEOUT=>15,
+    CURLOPT_RETURNTRANSFER=>true,
+    CURLOPT_FOLLOWLOCATION=>true,
+    CURLOPT_MAXREDIRS=>3,
+    CURLOPT_CONNECTTIMEOUT=>8,
+    CURLOPT_TIMEOUT=>15,
     CURLOPT_HTTPHEADER=>array_merge(array('Accept: application/json'), $headers),
     CURLOPT_USERAGENT=>'Bratonien-Tools-NC-Wizard/'.(function_exists('bratonien_tools_current_version') ? bratonien_tools_current_version() : 'dev'),
   );
-  if($username!==''){$options[CURLOPT_HTTPAUTH]=CURLAUTH_BASIC;$options[CURLOPT_USERPWD]=$username.':'.$password;}
+
+  if ($username !== '')
+  {
+    $options[CURLOPT_HTTPAUTH] = CURLAUTH_BASIC;
+    $options[CURLOPT_USERPWD] = $username.':'.$password;
+  }
+
   curl_setopt_array($ch, $options);
-  $body=curl_exec($ch);$errno=curl_errno($ch);$status=(int)curl_getinfo($ch,CURLINFO_HTTP_CODE);curl_close($ch);
+  $body = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $status = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  curl_close($ch);
+
   if ($body === false || $errno !== 0) throw new RuntimeException('Verbindung fehlgeschlagen.');
+
   return array('status'=>$status, 'body'=>(string)$body);
 }
 
@@ -64,28 +126,38 @@ function bratonien_tools_nc_wizard_ocs_data($body)
 {
   $decoded = json_decode((string)$body, true);
   if (!is_array($decoded) || !isset($decoded['ocs']) || !is_array($decoded['ocs'])) throw new RuntimeException('Nextcloud hat keine gültige Antwort geliefert.');
+
   $meta = isset($decoded['ocs']['meta']) && is_array($decoded['ocs']['meta']) ? $decoded['ocs']['meta'] : array();
-  $status=strtolower(trim((string)($meta['status']??'')));$status_code=isset($meta['statuscode'])?(int)$meta['statuscode']:0;
+  $status = strtolower(trim((string)($meta['status'] ?? '')));
+  $status_code = isset($meta['statuscode']) ? (int)$meta['statuscode'] : 0;
+
   if ($status !== 'ok' && !in_array($status_code, array(100,200), true))
   {
     $message = trim((string)($meta['message'] ?? ''));
     if ($message === '' || strtolower($message) === 'ok') $message = 'Nextcloud hat die Anfrage abgelehnt.';
     throw new RuntimeException($message);
   }
+
   return isset($decoded['ocs']['data']) && is_array($decoded['ocs']['data']) ? $decoded['ocs']['data'] : array();
 }
 
 function bratonien_tools_nc_wizard_fill_profile(array &$state)
 {
   $url_host = strtolower((string)parse_url($state['base_url'], PHP_URL_HOST));
-  $state['db_host']='';
+
+  $state['db_host'] = $url_host;
   $state['db_port'] = '5432';
   $state['db_database'] = 'nextcloud';
+  $state['db_user'] = (string)$state['username'];
+  $state['_db_password'] = (string)$state['_password'];
+  $state['db_password_set'] = $state['_db_password'] !== '';
   $state['source_view'] = 'piwigo_showcase_sources';
   $state['activity_view'] = 'piwigo_showcase_activity';
   $state['gallery_root'] = rtrim(PHPWG_ROOT_PATH, '/').'/galleries/nextcloud';
-  $state['technical_stage']='reader_credentials';
+  $state['storages'] = array();
-  $state['technical_source']='Noch nicht geprüft';
+  $state['storage_candidates'] = array();
+  $state['technical_stage'] = 'auto_check';
+  $state['technical_source'] = 'Automatische Prüfung';
   $state['technical_error'] = '';
   $state['technical_complete'] = false;
 
@@ -94,95 +166,44 @@ function bratonien_tools_nc_wizard_fill_profile(array &$state)
     $config = isset($candidate['config']) && is_array($candidate['config']) ? $candidate['config'] : array();
     $candidate_url = trim((string)($config['nextcloud_url'] ?? ''));
     $match = false;
+
     if ($candidate_url !== '')
     {
-      try{$match=bratonien_tools_nc_wizard_normalize_url($candidate_url)===$state['base_url'];}catch(Throwable $ignored){$match=false;}
+      try
+      {
+        $match = bratonien_tools_nc_wizard_normalize_url($candidate_url) === $state['base_url'];
       }
+      catch (Throwable $ignored)
+      {
+        $match = false;
+      }
+    }
+
     if (!$match) continue;
 
-    $full=bratonien_tools_nc_connector_connection((int)$candidate['id'],true);
+    $state['db_host'] = trim((string)($config['host'] ?? $state['db_host']));
-    if(!$full) continue;
+    $state['db_port'] = trim((string)($config['port'] ?? $state['db_port']));
-    $credentials=bratonien_tools_nc_connector_credentials_from_blob($full['secret_blob']??'');
+    $state['db_database'] = trim((string)($config['database'] ?? $state['db_database']));
-    $state['db_host']=(string)($config['host']??'');
+    $state['source_view'] = trim((string)($config['source_view'] ?? $state['source_view']));
-    $state['db_port']=(string)($config['port']??'5432');
+    $state['activity_view'] = trim((string)($config['activity_view'] ?? $state['activity_view']));
-    $state['db_database']=(string)($config['database']??'nextcloud');
+    $state['gallery_root'] = trim((string)($config['gallery_root'] ?? $state['gallery_root']));
-    $state['db_user']=(string)($config['user']??'');
-    $state['_db_password']=(string)($credentials['db_password']??'');
-    $state['db_password_set']=$state['_db_password']!=='';
-    $state['source_view']=(string)($config['source_view']??$state['source_view']);
-    $state['activity_view']=(string)($config['activity_view']??$state['activity_view']);
-    $state['gallery_root']=(string)($config['gallery_root']??$state['gallery_root']);
     $state['storages'] = isset($config['storages']) && is_array($config['storages']) ? $config['storages'] : array();
     $state['storage_candidates'] = $state['storages'];
-    $state['technical_complete']=$state['db_host']!==''&&$state['db_user']!==''&&$state['db_password_set']&&!empty($state['storages']);
+    $state['technical_source'] = 'Bekannte Verbindungswerte werden erneut geprüft';
-    $state['technical_stage']=$state['technical_complete']?'ready':'reader_credentials';
-    $state['technical_source']='Passende vorhandene Verbindung übernommen';
     break;
   }
-
-  if($state['db_host']==='') $state['db_host']=$url_host;
-}
-
-function bratonien_tools_nc_wizard_scan()
-{
-  $state=bratonien_tools_nc_wizard_state();
-  $host_input=trim((string)($_POST['nc_wizard_host']??$state['host_input']));
-  $username=trim((string)($_POST['nc_wizard_user']??$state['username']));
-  $password=array_key_exists('nc_wizard_password',$_POST)?(string)$_POST['nc_wizard_password']:(string)$state['_password'];
-  $state['step']=1;$state['host_input']=$host_input;$state['username']=$username;$state['_password']=$password;bratonien_tools_nc_wizard_store($state);
-  if($username===''||$password==='') throw new RuntimeException('Nextcloud-Benutzer und Passwort werden für den Scan benötigt.');
-
-  $base_url='';$status_data=null;
-  foreach(bratonien_tools_nc_wizard_candidate_urls($host_input) as $candidate_url)
-  {
-    try
-    {
-      $response=bratonien_tools_nc_wizard_http($candidate_url.'/status.php');
-      if($response['status']<200||$response['status']>=300) continue;
-      $candidate_status=json_decode($response['body'],true);
-      if(!is_array($candidate_status)||empty($candidate_status['installed'])) continue;
-      $base_url=$candidate_url;$status_data=$candidate_status;break;
-    }
-    catch(Throwable $ignored){}
-  }
-  if($base_url===''||!is_array($status_data)) throw new RuntimeException('Unter dieser Adresse konnte keine Nextcloud erreicht werden. HTTP und HTTPS wurden automatisch geprüft.');
-
-  $user_response=bratonien_tools_nc_wizard_http($base_url.'/ocs/v2.php/cloud/user?format=json',$username,$password,array('OCS-APIRequest: true'));
-  if($user_response['status']===401||$user_response['status']===403) throw new RuntimeException('Nextcloud hat Benutzername oder Passwort abgelehnt.');
-  if($user_response['status']<200||$user_response['status']>=300) throw new RuntimeException('Nextcloud ist erreichbar, aber die Anmeldung konnte nicht geprüft werden.');
-  $user_data=bratonien_tools_nc_wizard_ocs_data($user_response['body']);
-
-  $users=array();$can_list_users=false;
-  try
-  {
-    $users_response=bratonien_tools_nc_wizard_http($base_url.'/ocs/v2.php/cloud/users?format=json',$username,$password,array('OCS-APIRequest: true'));
-    if($users_response['status']>=200&&$users_response['status']<300)
-    {
-      $users_data=bratonien_tools_nc_wizard_ocs_data($users_response['body']);
-      if(isset($users_data['users'])&&is_array($users_data['users']))
-      {
-        $users=array_values(array_filter(array_map('strval',$users_data['users'])));sort($users,SORT_NATURAL|SORT_FLAG_CASE);$can_list_users=true;
-      }
-    }
-  }
-  catch(Throwable $ignored){}
-
-  $url_host=(string)parse_url($base_url,PHP_URL_HOST);
-  $state=array_merge($state,array(
-    'step'=>2,'scan_ok'=>true,'base_url'=>$base_url,'host_input'=>$host_input,
-    'username'=>(string)($user_data['id']??$username),'display_name'=>(string)($user_data['display-name']??$user_data['displayname']??''),
-    'version'=>(string)($status_data['versionstring']??$status_data['version']??''),'product'=>(string)($status_data['productname']??'Nextcloud'),
-    'users'=>$users,'can_list_users'=>$can_list_users,'showcase_user'=>'','connection_name'=>$url_host!==''?$url_host:'Nextcloud',
-    'scan_message'=>'Nextcloud wurde erkannt und der Benutzerzugriff wurde bestätigt.','_password'=>$password,'api_status'=>'pending','api_username'=>'','api_error'=>''
-  ));
-  bratonien_tools_nc_wizard_fill_profile($state);bratonien_tools_nc_wizard_store($state);
-  return array('message'=>'Nextcloud wurde gefunden und der Zugang bestätigt.');
 }
 
 function bratonien_tools_nc_wizard_finish_data_access(array &$state)
 {
-  $config=array('host'=>$state['db_host'],'port'=>$state['db_port'],'database'=>$state['db_database'],'user'=>$state['db_user']);
+  $config = array(
+    'host'=>$state['db_host'],
+    'port'=>$state['db_port'],
+    'database'=>$state['db_database'],
+    'user'=>$state['db_user'],
+  );
   $password = (string)$state['_db_password'];
+
   bratonien_tools_nc_connector_psql($config, $password, 'SELECT 1');
 
   $source_view = bratonien_tools_nc_connector_view_name($state['source_view']);
@@ -190,19 +211,37 @@ function bratonien_tools_nc_wizard_finish_data_access(array &$state)
   bratonien_tools_nc_connector_psql($config, $password, 'SELECT COUNT(*) FROM '.$source_view);
   bratonien_tools_nc_connector_psql($config, $password, 'SELECT 1 FROM '.$activity_view.' LIMIT 1');
 
-  $rows=bratonien_tools_nc_connector_psql($config,$password,"SELECT DISTINCT storage_id::text || E'\\t' || COALESCE(source_path, '') FROM ".$source_view." ORDER BY 1");
+  $rows = bratonien_tools_nc_connector_psql(
+    $config,
+    $password,
+    "SELECT DISTINCT storage_id::text || E'\\t' || COALESCE(source_path, '') FROM ".$source_view." ORDER BY 1"
+  );
+
   $candidates = array();
   foreach (preg_split('/\r\n|\r|\n/', trim($rows)) as $line)
   {
     if ($line === '') continue;
+
     $parts = explode("\t", $line, 2);
     if (count($parts) !== 2) continue;
-    $storage_id=trim($parts[0]);$source_path=trim($parts[1],'/');
+
+    $storage_id = trim($parts[0]);
+    $source_path = trim($parts[1], '/');
     if ($storage_id === '') continue;
+
     $prefix = $source_path;
     if (strpos($source_path, '/') !== false) $prefix = substr($source_path, 0, strpos($source_path, '/'));
-    if(!isset($candidates[$storage_id])) $candidates[$storage_id]=array('storage_id'=>$storage_id,'source_prefix'=>$prefix,'local_mount'=>'');
+
+    if (!isset($candidates[$storage_id]))
+    {
+      $candidates[$storage_id] = array(
+        'storage_id'=>$storage_id,
+        'source_prefix'=>$prefix,
+        'local_mount'=>'',
+      );
     }
+  }
+
   if (!$candidates) throw new RuntimeException('Die Verbindung zur Datenquelle funktioniert, aber es wurden noch keine freigegebenen Speicherorte gefunden.');
 
   $known = array();
@@ -214,6 +253,7 @@ function bratonien_tools_nc_wizard_finish_data_access(array &$state)
       if ($key !== '|') $known[$key] = (string)($storage['local_mount'] ?? '');
     }
   }
+
   foreach ($candidates as &$candidate)
   {
     $key = $candidate['storage_id'].'|'.trim($candidate['source_prefix'], '/');
@@ -222,57 +262,175 @@ function bratonien_tools_nc_wizard_finish_data_access(array &$state)
   unset($candidate);
 
   $state['storage_candidates'] = array_values($candidates);
-  $state['storages']=array_values(array_filter($state['storage_candidates'],function($storage){return trim((string)($storage['local_mount']??''))!=='';}));
+  $state['storages'] = array_values(array_filter($state['storage_candidates'], function($storage) {
+    return trim((string)($storage['local_mount'] ?? '')) !== '';
+  }));
   $state['technical_error'] = '';
   $state['technical_source'] = 'Datenzugriff erfolgreich geprüft';
   $state['technical_complete'] = count($state['storages']) === count($state['storage_candidates']);
   $state['technical_stage'] = $state['technical_complete'] ? 'ready' : 'mounts';
 }
 
+function bratonien_tools_nc_wizard_scan()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  $host_input = trim((string)($_POST['nc_wizard_host'] ?? $state['host_input']));
+  $username = trim((string)($_POST['nc_wizard_user'] ?? $state['username']));
+  $password = array_key_exists('nc_wizard_password', $_POST) ? (string)$_POST['nc_wizard_password'] : (string)$state['_password'];
+
+  $state['step'] = 1;
+  $state['host_input'] = $host_input;
+  $state['username'] = $username;
+  $state['_password'] = $password;
+  bratonien_tools_nc_wizard_store($state);
+
+  if ($username === '' || $password === '') throw new RuntimeException('Nextcloud-Benutzer und Passwort werden für den Scan benötigt.');
+
+  $base_url = '';
+  $status_data = null;
+  foreach (bratonien_tools_nc_wizard_candidate_urls($host_input) as $candidate_url)
+  {
+    try
+    {
+      $response = bratonien_tools_nc_wizard_http($candidate_url.'/status.php');
+      if ($response['status'] < 200 || $response['status'] >= 300) continue;
+
+      $candidate_status = json_decode($response['body'], true);
+      if (!is_array($candidate_status) || empty($candidate_status['installed'])) continue;
+
+      $base_url = $candidate_url;
+      $status_data = $candidate_status;
+      break;
+    }
+    catch (Throwable $ignored)
+    {
+    }
+  }
+
+  if ($base_url === '' || !is_array($status_data)) throw new RuntimeException('Unter dieser Adresse konnte keine Nextcloud erreicht werden. HTTP und HTTPS wurden automatisch geprüft.');
+
+  $user_response = bratonien_tools_nc_wizard_http(
+    $base_url.'/ocs/v2.php/cloud/user?format=json',
+    $username,
+    $password,
+    array('OCS-APIRequest: true')
+  );
+
+  if ($user_response['status'] === 401 || $user_response['status'] === 403) throw new RuntimeException('Nextcloud hat Benutzername oder Passwort abgelehnt.');
+  if ($user_response['status'] < 200 || $user_response['status'] >= 300) throw new RuntimeException('Nextcloud ist erreichbar, aber die Anmeldung konnte nicht geprüft werden.');
+
+  $user_data = bratonien_tools_nc_wizard_ocs_data($user_response['body']);
+
+  $users = array();
+  $can_list_users = false;
+  try
+  {
+    $users_response = bratonien_tools_nc_wizard_http(
+      $base_url.'/ocs/v2.php/cloud/users?format=json',
+      $username,
+      $password,
+      array('OCS-APIRequest: true')
+    );
+
+    if ($users_response['status'] >= 200 && $users_response['status'] < 300)
+    {
+      $users_data = bratonien_tools_nc_wizard_ocs_data($users_response['body']);
+      if (isset($users_data['users']) && is_array($users_data['users']))
+      {
+        $users = array_values(array_filter(array_map('strval', $users_data['users'])));
+        sort($users, SORT_NATURAL | SORT_FLAG_CASE);
+        $can_list_users = true;
+      }
+    }
+  }
+  catch (Throwable $ignored)
+  {
+  }
+
+  $resolved_username = trim((string)($user_data['id'] ?? $username));
+  if ($resolved_username === '') $resolved_username = $username;
+  $url_host = (string)parse_url($base_url, PHP_URL_HOST);
+
+  $state = array_merge($state, array(
+    'step'=>2,
+    'scan_ok'=>true,
+    'base_url'=>$base_url,
+    'host_input'=>$host_input,
+    'username'=>$resolved_username,
+    'display_name'=>(string)($user_data['display-name'] ?? $user_data['displayname'] ?? ''),
+    'version'=>(string)($status_data['versionstring'] ?? $status_data['version'] ?? ''),
+    'product'=>(string)($status_data['productname'] ?? 'Nextcloud'),
+    'users'=>$users,
+    'can_list_users'=>$can_list_users,
+    'showcase_user'=>'',
+    'connection_name'=>$url_host !== '' ? $url_host : 'Nextcloud',
+    'scan_message'=>'Nextcloud wurde erkannt und der Benutzerzugriff wurde bestätigt.',
+    '_password'=>$password,
+    'api_status'=>'pending',
+    'api_username'=>'',
+    'api_error'=>'',
+  ));
+
+  bratonien_tools_nc_wizard_fill_profile($state);
+
+  try
+  {
+    bratonien_tools_nc_wizard_finish_data_access($state);
+  }
+  catch (Throwable $e)
+  {
+    $state['technical_complete'] = false;
+    $state['technical_stage'] = 'database_details';
+    $state['technical_error'] = $e->getMessage();
+  }
+
+  bratonien_tools_nc_wizard_store($state);
+
+  if ($state['technical_stage'] === 'database_details')
+  {
+    return array('message'=>'Nextcloud wurde gefunden. Die Datenbank-Adresse muss noch bestätigt werden.');
+  }
+  if ($state['technical_stage'] === 'mounts')
+  {
+    return array('message'=>'Nextcloud und Datenzugriff wurden bestätigt. Ein Speicherort muss noch zugeordnet werden.');
+  }
+
+  return array('message'=>'Nextcloud und Datenzugriff wurden erfolgreich bestätigt.');
+}
+
 function bratonien_tools_nc_wizard_save_technical()
 {
   $state = bratonien_tools_nc_wizard_state();
   if (empty($state['scan_ok'])) throw new RuntimeException('Bitte zuerst Nextcloud erfolgreich scannen.');
+  if ((string)$state['username'] === '' || (string)$state['_password'] === '') throw new RuntimeException('Die Zugangsdaten aus dem ersten Schritt sind nicht mehr verfügbar. Bitte den Assistenten neu starten.');
 
-  $state['connection_name']=trim((string)($_POST['nc_wizard_connection_name']??$state['connection_name']));
+  $state['db_user'] = (string)$state['username'];
-  $state['db_user']=trim((string)($_POST['nc_wizard_db_user']??$state['db_user']));
+  $state['_db_password'] = (string)$state['_password'];
-  $db_password=array_key_exists('nc_wizard_db_password',$_POST)?(string)$_POST['nc_wizard_db_password']:(string)$state['_db_password'];
+  $state['db_password_set'] = true;
-  if($db_password!==''){$state['_db_password']=$db_password;$state['db_password_set']=true;}
-
-  $advanced=isset($_POST['nc_wizard_db_host'])||$state['technical_stage']==='database_details';
-  if($advanced)
-  {
   $state['db_host'] = trim((string)($_POST['nc_wizard_db_host'] ?? $state['db_host']));
   $state['db_port'] = (string)max(1, min(65535, (int)($_POST['nc_wizard_db_port'] ?? $state['db_port'])));
   $state['db_database'] = trim((string)($_POST['nc_wizard_db_database'] ?? $state['db_database']));
-  }
+  $state['technical_stage'] = 'database_details';
-  else
-  {
-    $state['db_host']=(string)parse_url($state['base_url'],PHP_URL_HOST);
-    $state['db_port']='5432';
-    $state['db_database']='nextcloud';
-  }
-
   bratonien_tools_nc_wizard_store($state);
-  if($state['db_user']===''||empty($state['db_password_set'])) throw new RuntimeException('Für den Datenzugriff werden Lese-Benutzer und Passwort benötigt.');
+
   if ($state['db_host'] === '' || $state['db_database'] === '') throw new RuntimeException('Die Adresse der Datenbank ist noch unvollständig.');
 
   try
   {
     bratonien_tools_nc_wizard_finish_data_access($state);
     bratonien_tools_nc_wizard_store($state);
-    return array('message'=>$state['technical_complete']?'Datenzugriff wurde erfolgreich geprüft.':'Datenzugriff funktioniert. Ein Speicherort muss noch bestätigt werden.');
+
+    return array(
+      'message'=>$state['technical_complete']
+        ? 'Datenzugriff wurde erfolgreich geprüft.'
+        : 'Datenzugriff funktioniert. Ein Speicherort muss noch bestätigt werden.'
+    );
   }
   catch (Throwable $e)
   {
     $state['technical_error'] = $e->getMessage();
-    if(!$advanced)
-    {
     $state['technical_stage'] = 'database_details';
     bratonien_tools_nc_wizard_store($state);
-      throw new RuntimeException('Der übliche Datenbankzugang konnte nicht automatisch bestätigt werden. Bitte die Datenbank-Adresse prüfen.');
-    }
-    bratonien_tools_nc_wizard_store($state);
     throw $e;
   }
 }
@@ -282,18 +440,30 @@ function bratonien_tools_nc_wizard_save_mounts()
   $state = bratonien_tools_nc_wizard_state();
   $candidates = is_array($state['storage_candidates']) ? $state['storage_candidates'] : array();
   $mounts = isset($_POST['nc_wizard_storage_mount']) && is_array($_POST['nc_wizard_storage_mount']) ? $_POST['nc_wizard_storage_mount'] : array();
+
   if (!$candidates) throw new RuntimeException('Es wurden noch keine Speicherorte erkannt.');
+
   $storages = array();
   foreach ($candidates as $index=>$candidate)
   {
     $mount = trim((string)($candidate['local_mount'] ?? ''));
     if ($mount === '') $mount = trim((string)($mounts[$index] ?? ''));
     if ($mount === '' || $mount[0] !== '/') throw new RuntimeException('Für einen Speicherort fehlt ein gültiger lokaler Pfad.');
+
     $mount = rtrim($mount, '/');
     if (!is_dir($mount) || !is_readable($mount)) throw new RuntimeException('Der angegebene Speicherort ist nicht vorhanden oder nicht lesbar: '.$mount);
-    $candidate['local_mount']=$mount;$storages[]=$candidate;
+
+    $candidate['local_mount'] = $mount;
+    $storages[] = $candidate;
   }
-  $state['storages']=$storages;$state['storage_candidates']=$storages;$state['technical_complete']=true;$state['technical_stage']='ready';$state['technical_error']='';bratonien_tools_nc_wizard_store($state);
+
+  $state['storages'] = $storages;
+  $state['storage_candidates'] = $storages;
+  $state['technical_complete'] = true;
+  $state['technical_stage'] = 'ready';
+  $state['technical_error'] = '';
+  bratonien_tools_nc_wizard_store($state);
+
   return array('message'=>'Speicherzuordnung wurde erfolgreich geprüft.');
 }
 
@@ -302,11 +472,18 @@ function bratonien_tools_nc_wizard_select_user()
   $state = bratonien_tools_nc_wizard_state();
   if (empty($state['scan_ok'])) throw new RuntimeException('Bitte zuerst Nextcloud erfolgreich scannen.');
   if (empty($state['technical_complete'])) throw new RuntimeException('Die Verbindung ist noch nicht vollständig geprüft.');
+
   $showcase_user = trim((string)($_POST['nc_wizard_showcase_user'] ?? ''));
   $connection_name = trim((string)($_POST['nc_wizard_connection_name'] ?? $state['connection_name']));
   if ($showcase_user === '') throw new RuntimeException('Bitte den Benutzer auswählen, der die Showcase-Freigaben bereitstellt.');
   if ($connection_name === '') throw new RuntimeException('Bitte einen Namen für die Verbindung angeben.');
-  $state['connection_name']=$connection_name;$state['showcase_user']=$showcase_user;$state['step']=3;$state['api_error']='';bratonien_tools_nc_wizard_store($state);
+
+  $state['connection_name'] = $connection_name;
+  $state['showcase_user'] = $showcase_user;
+  $state['step'] = 3;
+  $state['api_error'] = '';
+  bratonien_tools_nc_wizard_store($state);
+
   return array('message'=>'Showcase-Benutzer übernommen. Jetzt folgt der Piwigo-API-Zugang.');
 }
 
@@ -314,29 +491,66 @@ function bratonien_tools_nc_wizard_api_test()
 {
   $state = bratonien_tools_nc_wizard_state();
   if ((int)$state['step'] !== 3) throw new RuntimeException('Der API-Test ist in diesem Assistentenschritt nicht verfügbar.');
-  $posted_id=trim((string)($_POST['nc_wizard_api_key_id']??''));$posted_secret=trim((string)($_POST['nc_wizard_api_key_secret']??''));
+
-  if($posted_id!=='')$state['_api_key_id']=$posted_id;if($posted_secret!=='')$state['_api_key_secret']=$posted_secret;bratonien_tools_nc_wizard_store($state);
+  $posted_id = trim((string)($_POST['nc_wizard_api_key_id'] ?? ''));
-  $key_id=trim((string)$state['_api_key_id']);$secret=trim((string)$state['_api_key_secret']);
+  $posted_secret = trim((string)($_POST['nc_wizard_api_key_secret'] ?? ''));
-  if($key_id===''&&$secret===''){$stored=bratonien_tools_nc_api_credentials();$key_id=trim((string)($stored['key_id']??''));$secret=trim((string)($stored['key_secret']??''));}
+  if ($posted_id !== '') $state['_api_key_id'] = $posted_id;
+  if ($posted_secret !== '') $state['_api_key_secret'] = $posted_secret;
+  bratonien_tools_nc_wizard_store($state);
+
+  $key_id = trim((string)$state['_api_key_id']);
+  $secret = trim((string)$state['_api_key_secret']);
+
+  if ($key_id === '' && $secret === '')
+  {
+    $stored = bratonien_tools_nc_api_credentials();
+    $key_id = trim((string)($stored['key_id'] ?? ''));
+    $secret = trim((string)($stored['key_secret'] ?? ''));
+  }
+
   if ($key_id === '' || $secret === '') throw new RuntimeException('API-Schlüssel-ID und API-Geheimnis fehlen.');
+
   try
   {
     $status = bratonien_tools_nc_connector_piwigo_api_request($key_id, $secret, 'pwg.session.getStatus');
     $user_status = strtolower((string)($status['status'] ?? ''));
     if (!in_array($user_status, array('admin','webmaster'), true)) throw new RuntimeException('Der API-Key gehört keinem Piwigo-Administrator/Webmaster.');
-    $method_result=bratonien_tools_nc_connector_piwigo_api_request($key_id,$secret,'reflection.getMethodList');$method_map=array();bratonien_tools_nc_connector_collect_method_names($method_result,$method_map);
+
+    $method_result = bratonien_tools_nc_connector_piwigo_api_request($key_id, $secret, 'reflection.getMethodList');
+    $method_map = array();
+    bratonien_tools_nc_connector_collect_method_names($method_result, $method_map);
     $missing = array_values(array_diff(array('bratonien.nc.syncProductive','bratonien.nc.syncOrphans'), array_keys($method_map)));
     if ($missing) throw new RuntimeException('Benötigte Bratonien-Sync-Methoden fehlen: '.implode(', ', $missing).'.');
-    $state['_api_key_id']=$key_id;$state['_api_key_secret']=$secret;$state['api_status']='ok';$state['api_username']=(string)($status['username']??$status['user']??'');$state['api_error']='';$state['step']=4;bratonien_tools_nc_wizard_store($state);
+
+    $state['_api_key_id'] = $key_id;
+    $state['_api_key_secret'] = $secret;
+    $state['api_status'] = 'ok';
+    $state['api_username'] = (string)($status['username'] ?? $status['user'] ?? '');
+    $state['api_error'] = '';
+    $state['step'] = 4;
+    bratonien_tools_nc_wizard_store($state);
+
     return array('message'=>'Piwigo-API erfolgreich geprüft. Gespeichert wird sie erst beim Abschluss des Assistenten.');
   }
-  catch(Throwable $e){$state['api_status']='error';$state['api_error']=$e->getMessage();bratonien_tools_nc_wizard_store($state);throw $e;}
+  catch (Throwable $e)
+  {
+    $state['api_status'] = 'error';
+    $state['api_error'] = $e->getMessage();
+    bratonien_tools_nc_wizard_store($state);
+    throw $e;
+  }
 }
 
 function bratonien_tools_nc_wizard_api_skip()
 {
-  $state=bratonien_tools_nc_wizard_state();if((int)$state['step']!==3)throw new RuntimeException('Die API kann in diesem Assistentenschritt nicht übersprungen werden.');
+  $state = bratonien_tools_nc_wizard_state();
-  $state['api_status']='skipped';$state['api_error']='';$state['step']=4;bratonien_tools_nc_wizard_store($state);
+  if ((int)$state['step'] !== 3) throw new RuntimeException('Die API kann in diesem Assistentenschritt nicht übersprungen werden.');
+
+  $state['api_status'] = 'skipped';
+  $state['api_error'] = '';
+  $state['step'] = 4;
+  bratonien_tools_nc_wizard_store($state);
+
   return array('message'=>'Piwigo-API wurde übersprungen. Für diese Verbindung ist deshalb ein Fallback-Zugang erforderlich.');
 }
 
@@ -344,10 +558,13 @@ function bratonien_tools_nc_wizard_finish()
 {
   $state = bratonien_tools_nc_wizard_state();
   if ((int)$state['step'] !== 4 || empty($state['technical_complete']) || trim((string)$state['showcase_user']) === '') throw new RuntimeException('Der Assistent ist noch nicht vollständig.');
+
   if (array_key_exists('nc_wizard_fallback_user', $_POST)) $state['_fallback_user'] = trim((string)$_POST['nc_wizard_fallback_user']);
   if (array_key_exists('nc_wizard_fallback_password', $_POST)) $state['_fallback_password'] = (string)$_POST['nc_wizard_fallback_password'];
   bratonien_tools_nc_wizard_store($state);
-  $fallback_user=trim((string)$state['_fallback_user']);$fallback_password=(string)$state['_fallback_password'];
+
+  $fallback_user = trim((string)$state['_fallback_user']);
+  $fallback_password = (string)$state['_fallback_password'];
   if (($fallback_user === '') !== ($fallback_password === '')) throw new RuntimeException('Fallback-Benutzer und Fallback-Passwort müssen entweder beide angegeben oder beide leer gelassen werden.');
   if ($state['api_status'] !== 'ok' && $fallback_user === '') throw new RuntimeException('Da die Piwigo-API übersprungen wurde, ist ein Fallback-Zugang erforderlich.');
 
@@ -356,22 +573,111 @@ function bratonien_tools_nc_wizard_finish()
   {
     $storage_lines[] = (string)$storage['storage_id'].' | '.trim((string)$storage['source_prefix'], '/').' | '.(string)$storage['local_mount'];
   }
-  $_POST['nc_name']=(string)$state['connection_name'];$_POST['nc_host']=(string)$state['db_host'];$_POST['nc_port']=(string)$state['db_port'];$_POST['nc_database']=(string)$state['db_database'];$_POST['nc_user']=(string)$state['db_user'];$_POST['nc_db_password']=(string)$state['_db_password'];$_POST['nc_source_view']=(string)$state['source_view'];$_POST['nc_activity_view']=(string)$state['activity_view'];$_POST['nc_gallery_root']=(string)$state['gallery_root'];$_POST['nc_storages']=implode("\n",$storage_lines);$_POST['nc_quiet_seconds']='120';$_POST['nc_max_wait_seconds']='900';$_POST['nc_full_sync_seconds']='86400';$_POST['nc_piwigo_user']=$fallback_user;$_POST['nc_piwigo_password']=$fallback_password;$_POST['nc_nextcloud_url']=(string)$state['base_url'];$_POST['nc_showcase_user']=(string)$state['showcase_user'];$_POST['nc_access_user']=(string)$state['username'];$_POST['nc_product']=(string)$state['product'];$_POST['nc_version']=(string)$state['version'];$_POST['nc_api_validated']=$state['api_status']==='ok'?'1':'0';
+
-  $result=bratonien_tools_nc_connector_create_local_api_first();$connection_id=(int)($result['connection_id']??0);
+  $_POST['nc_name'] = (string)$state['connection_name'];
-  try{if($state['api_status']==='ok')bratonien_tools_nc_api_credentials_store((string)$state['_api_key_id'],(string)$state['_api_key_secret']);}
+  $_POST['nc_host'] = (string)$state['db_host'];
-  catch(Throwable $e){if($connection_id>0){$table=bratonien_tools_nc_connector_table();pwg_query("DELETE FROM `$table` WHERE id=".$connection_id." LIMIT 1");}throw new RuntimeException('Die Verbindung wurde nicht übernommen, weil der geprüfte API-Zugang nicht gespeichert werden konnte: '.$e->getMessage());}
+  $_POST['nc_port'] = (string)$state['db_port'];
-  unset($_SESSION['bratonien_nc_wizard']);unset($result['connection_id']);$result['message']='Verbindung wurde vollständig durch den Assistenten angelegt. '.$result['message'];return $result;
+  $_POST['nc_database'] = (string)$state['db_database'];
+  $_POST['nc_user'] = (string)$state['db_user'];
+  $_POST['nc_db_password'] = (string)$state['_db_password'];
+  $_POST['nc_source_view'] = (string)$state['source_view'];
+  $_POST['nc_activity_view'] = (string)$state['activity_view'];
+  $_POST['nc_gallery_root'] = (string)$state['gallery_root'];
+  $_POST['nc_storages'] = implode("\n", $storage_lines);
+  $_POST['nc_quiet_seconds'] = '120';
+  $_POST['nc_max_wait_seconds'] = '900';
+  $_POST['nc_full_sync_seconds'] = '86400';
+  $_POST['nc_piwigo_user'] = $fallback_user;
+  $_POST['nc_piwigo_password'] = $fallback_password;
+  $_POST['nc_nextcloud_url'] = (string)$state['base_url'];
+  $_POST['nc_showcase_user'] = (string)$state['showcase_user'];
+  $_POST['nc_access_user'] = (string)$state['username'];
+  $_POST['nc_product'] = (string)$state['product'];
+  $_POST['nc_version'] = (string)$state['version'];
+  $_POST['nc_api_validated'] = $state['api_status'] === 'ok' ? '1' : '0';
+
+  $result = bratonien_tools_nc_connector_create_local_api_first();
+  $connection_id = (int)($result['connection_id'] ?? 0);
+
+  try
+  {
+    if ($state['api_status'] === 'ok') bratonien_tools_nc_api_credentials_store((string)$state['_api_key_id'], (string)$state['_api_key_secret']);
+  }
+  catch (Throwable $e)
+  {
+    if ($connection_id > 0)
+    {
+      $table = bratonien_tools_nc_connector_table();
+      pwg_query("DELETE FROM `$table` WHERE id=".$connection_id." LIMIT 1");
+    }
+    throw new RuntimeException('Die Verbindung wurde nicht übernommen, weil der geprüfte API-Zugang nicht gespeichert werden konnte: '.$e->getMessage());
+  }
+
+  unset($_SESSION['bratonien_nc_wizard']);
+  unset($result['connection_id']);
+  $result['message'] = 'Verbindung wurde vollständig durch den Assistenten angelegt. '.$result['message'];
+
+  return $result;
 }
 
 function bratonien_tools_nc_connector_update_name()
 {
-  $id=(int)($_POST['connection_id']??0);$name=trim((string)($_POST['connection_name']??''));if($id<1||$name==='')throw new RuntimeException('Verbindung oder Name fehlt.');$connection=bratonien_tools_nc_connector_connection($id,false);if(!$connection)throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');$table=bratonien_tools_nc_connector_table();$now=date('Y-m-d H:i:s');pwg_query("UPDATE `$table` SET name='".pwg_db_real_escape_string($name)."', updated='".pwg_db_real_escape_string($now)."' WHERE id=".$id." LIMIT 1");return array('message'=>'Verbindungsname wurde aktualisiert.');
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $name = trim((string)($_POST['connection_name'] ?? ''));
+  if ($id < 1 || $name === '') throw new RuntimeException('Verbindung oder Name fehlt.');
+
+  $connection = bratonien_tools_nc_connector_connection($id, false);
+  if (!$connection) throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
+
+  $table = bratonien_tools_nc_connector_table();
+  $now = date('Y-m-d H:i:s');
+  pwg_query("UPDATE `$table` SET name='".pwg_db_real_escape_string($name)."', updated='".pwg_db_real_escape_string($now)."' WHERE id=".$id." LIMIT 1");
+
+  return array('message'=>'Verbindungsname wurde aktualisiert.');
 }
 
 function bratonien_tools_nc_connector_update_technical()
 {
-  $id=(int)($_POST['connection_id']??0);$connection=bratonien_tools_nc_connector_connection($id,true);if(!$connection)throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');if(!empty($connection['enabled'])||(string)$connection['takeover_state']==='active')throw new RuntimeException('Technische Einstellungen einer aktiven Verbindung können nicht geändert werden. Bitte zuerst deaktivieren.');
+  $id = (int)($_POST['connection_id'] ?? 0);
-  $config=$connection['config'];$port=(int)($_POST['nc_port']??($config['port']??5432));if($port<1||$port>65535)throw new RuntimeException('Ungültiger PostgreSQL-Port.');$gallery_root=rtrim(trim((string)($_POST['nc_gallery_root']??($config['gallery_root']??''))),'/');if($gallery_root===''||$gallery_root[0]!=='/')throw new RuntimeException('Der Galerie-Pfad muss ein absoluter Pfad sein.');
+  $connection = bratonien_tools_nc_connector_connection($id, true);
-  $config['host']=trim((string)($_POST['nc_host']??($config['host']??'')));$config['port']=(string)$port;$config['database']=trim((string)($_POST['nc_database']??($config['database']??'')));$config['user']=trim((string)($_POST['nc_user']??($config['user']??'')));$config['source_view']=trim((string)($_POST['nc_source_view']??($config['source_view']??'')));$config['activity_view']=trim((string)($_POST['nc_activity_view']??($config['activity_view']??'')));$config['gallery_root']=$gallery_root;$config['quiet_seconds']=max(0,(int)($_POST['nc_quiet_seconds']??($config['quiet_seconds']??120)));$config['max_wait_seconds']=max(60,(int)($_POST['nc_max_wait_seconds']??($config['max_wait_seconds']??900)));$config['full_sync_seconds']=max(300,(int)($_POST['nc_full_sync_seconds']??($config['full_sync_seconds']??86400)));$config['storages']=bratonien_tools_nc_connector_parse_storages($_POST['nc_storages']??'');unset($config['verification']);bratonien_tools_nc_connector_view_name($config['source_view']);bratonien_tools_nc_connector_view_name($config['activity_view']);
+  if (!$connection) throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
-  $credentials=bratonien_tools_nc_connector_credentials_from_blob($connection['secret_blob']??'');$db_password=(string)($_POST['nc_db_password']??'');if($db_password==='')$db_password=$credentials['db_password'];if($db_password==='')throw new RuntimeException('Datenbankpasswort fehlt.');$secret_blob=bratonien_tools_nc_connector_encrypt_credentials($db_password,$credentials['piwigo_user'],$credentials['piwigo_password']);$config_json=json_encode($config,JSON_UNESCAPED_UNICODE|JSON_UNESCAPED_SLASHES);if(!is_string($config_json))throw new RuntimeException('Connector-Konfiguration konnte nicht serialisiert werden.');$table=bratonien_tools_nc_connector_table();$now=date('Y-m-d H:i:s');pwg_query("UPDATE `$table` SET takeover_state='disabled', enabled=0, config_json='".pwg_db_real_escape_string($config_json)."', secret_blob='".pwg_db_real_escape_string($secret_blob)."', updated='".pwg_db_real_escape_string($now)."' WHERE id=".$id." LIMIT 1");return array('message'=>'Technische Verbindungseinstellungen wurden gespeichert. Die Verbindung muss erneut geprüft werden.');
+  if (!empty($connection['enabled']) || (string)$connection['takeover_state'] === 'active') throw new RuntimeException('Technische Einstellungen einer aktiven Verbindung können nicht geändert werden. Bitte zuerst deaktivieren.');
+
+  $config = $connection['config'];
+  $port = (int)($_POST['nc_port'] ?? ($config['port'] ?? 5432));
+  if ($port < 1 || $port > 65535) throw new RuntimeException('Ungültiger PostgreSQL-Port.');
+
+  $gallery_root = rtrim(trim((string)($_POST['nc_gallery_root'] ?? ($config['gallery_root'] ?? ''))), '/');
+  if ($gallery_root === '' || $gallery_root[0] !== '/') throw new RuntimeException('Der Galerie-Pfad muss ein absoluter Pfad sein.');
+
+  $config['host'] = trim((string)($_POST['nc_host'] ?? ($config['host'] ?? '')));
+  $config['port'] = (string)$port;
+  $config['database'] = trim((string)($_POST['nc_database'] ?? ($config['database'] ?? '')));
+  $config['user'] = trim((string)($_POST['nc_user'] ?? ($config['user'] ?? '')));
+  $config['source_view'] = trim((string)($_POST['nc_source_view'] ?? ($config['source_view'] ?? '')));
+  $config['activity_view'] = trim((string)($_POST['nc_activity_view'] ?? ($config['activity_view'] ?? '')));
+  $config['gallery_root'] = $gallery_root;
+  $config['quiet_seconds'] = max(0, (int)($_POST['nc_quiet_seconds'] ?? ($config['quiet_seconds'] ?? 120)));
+  $config['max_wait_seconds'] = max(60, (int)($_POST['nc_max_wait_seconds'] ?? ($config['max_wait_seconds'] ?? 900)));
+  $config['full_sync_seconds'] = max(300, (int)($_POST['nc_full_sync_seconds'] ?? ($config['full_sync_seconds'] ?? 86400)));
+  $config['storages'] = bratonien_tools_nc_connector_parse_storages($_POST['nc_storages'] ?? '');
+  unset($config['verification']);
+
+  bratonien_tools_nc_connector_view_name($config['source_view']);
+  bratonien_tools_nc_connector_view_name($config['activity_view']);
+
+  $credentials = bratonien_tools_nc_connector_credentials_from_blob($connection['secret_blob'] ?? '');
+  $db_password = (string)($_POST['nc_db_password'] ?? '');
+  if ($db_password === '') $db_password = $credentials['db_password'];
+  if ($db_password === '') throw new RuntimeException('Datenbankpasswort fehlt.');
+
+  $secret_blob = bratonien_tools_nc_connector_encrypt_credentials($db_password, $credentials['piwigo_user'], $credentials['piwigo_password']);
+  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($config_json)) throw new RuntimeException('Connector-Konfiguration konnte nicht serialisiert werden.');
+
+  $table = bratonien_tools_nc_connector_table();
+  $now = date('Y-m-d H:i:s');
+  pwg_query("UPDATE `$table` SET takeover_state='disabled', enabled=0, config_json='".pwg_db_real_escape_string($config_json)."', secret_blob='".pwg_db_real_escape_string($secret_blob)."', updated='".pwg_db_real_escape_string($now)."' WHERE id=".$id." LIMIT 1");
+
+  return array('message'=>'Technische Verbindungseinstellungen wurden gespeichert. Die Verbindung muss erneut geprüft werden.');
 }

include/nc_connector_wizard_db_bridge.inc.php

@@ -0,0 +1,448 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_wizard_apply_known_database_profile(array &$state)
+{
+  if (empty($state['scan_ok']) || trim((string)($state['base_url'] ?? '')) === '') return false;
+
+  $base_host = strtolower(trim((string)parse_url((string)$state['base_url'], PHP_URL_HOST)));
+
+  foreach (bratonien_tools_nc_connector_connections() as $candidate)
+  {
+    $config = isset($candidate['config']) && is_array($candidate['config']) ? $candidate['config'] : array();
+    $candidate_url = trim((string)($config['nextcloud_url'] ?? ''));
+    $match = false;
+
+    if ($candidate_url !== '')
+    {
+      try
+      {
+        $match = bratonien_tools_nc_wizard_normalize_url($candidate_url) === (string)$state['base_url'];
+      }
+      catch (Throwable $ignored)
+      {
+        $match = false;
+      }
+    }
+    elseif ($base_host !== '')
+    {
+      $match = strtolower(trim((string)($config['host'] ?? ''))) === $base_host;
+    }
+
+    if (!$match) continue;
+
+    $connection = bratonien_tools_nc_connector_connection((int)$candidate['id'], true);
+    if (!$connection || !is_array($connection['config'] ?? null)) continue;
+
+    $known = $connection['config'];
+    $db_user = trim((string)($known['user'] ?? ''));
+    if ($db_user === '') continue;
+
+    $db_password = '';
+    try
+    {
+      $plain = bratonien_tools_nc_connector_decrypt_secret($connection['secret_blob'] ?? '');
+      $decoded = json_decode($plain, true);
+      $db_password = is_array($decoded) && array_key_exists('db_password', $decoded)
+        ? (string)$decoded['db_password']
+        : (string)$plain;
+    }
+    catch (Throwable $ignored)
+    {
+      $db_password = '';
+    }
+    if ($db_password === '') continue;
+
+    $state['db_host'] = trim((string)($known['host'] ?? $state['db_host']));
+    $state['db_port'] = trim((string)($known['port'] ?? $state['db_port']));
+    $state['db_database'] = trim((string)($known['database'] ?? $state['db_database']));
+    $state['db_user'] = $db_user;
+    $state['_db_password'] = $db_password;
+    $state['db_password_set'] = true;
+    $state['source_view'] = trim((string)($known['source_view'] ?? $state['source_view']));
+    $state['activity_view'] = trim((string)($known['activity_view'] ?? $state['activity_view']));
+    $state['gallery_root'] = trim((string)($known['gallery_root'] ?? $state['gallery_root']));
+    $state['storages'] = isset($known['storages']) && is_array($known['storages']) ? $known['storages'] : array();
+    $state['storage_candidates'] = $state['storages'];
+    $state['technical_source'] = 'Gespeicherte Reader-Verbindung wird erneut geprüft';
+    $state['technical_error'] = '';
+    return true;
+  }
+
+  return false;
+}
+
+function bratonien_tools_nc_wizard_prepare_directory_stage(array &$state, array $known_storages)
+{
+  if ((string)($state['technical_stage'] ?? '') === 'database_details') return;
+
+  $known_by_storage = array();
+  foreach ($known_storages as $known)
+  {
+    $storage_id = trim((string)($known['storage_id'] ?? ''));
+    $mount = rtrim(trim((string)($known['local_mount'] ?? '')), '/');
+    if ($storage_id === '' || $mount === '') continue;
+    if (!isset($known_by_storage[$storage_id])) $known_by_storage[$storage_id] = $known;
+  }
+
+  $candidates = isset($state['storage_candidates']) && is_array($state['storage_candidates']) ? $state['storage_candidates'] : array();
+  $all_mapped = !empty($candidates);
+
+  foreach ($candidates as &$candidate)
+  {
+    $storage_id = trim((string)($candidate['storage_id'] ?? ''));
+    $known = isset($known_by_storage[$storage_id]) ? $known_by_storage[$storage_id] : null;
+    if (is_array($known))
+    {
+      $candidate['source_prefix'] = trim((string)($known['source_prefix'] ?? $candidate['source_prefix'] ?? ''), '/');
+      $candidate['local_mount'] = rtrim(trim((string)($known['local_mount'] ?? '')), '/');
+    }
+
+    $mount = trim((string)($candidate['local_mount'] ?? ''));
+    if ($mount === '' || !is_dir($mount) || !is_readable($mount)) $all_mapped = false;
+    $candidate['include_prefix'] = '';
+  }
+  unset($candidate);
+
+  $state['storage_candidates'] = $candidates;
+  $state['storages'] = array();
+  $state['technical_complete'] = false;
+  $state['technical_stage'] = 'mounts';
+  $state['technical_source'] = $all_mapped
+    ? 'Datenzugriff und Speicherzuordnung erkannt; Verzeichnisauswahl offen'
+    : 'Datenzugriff erkannt; Speicherzuordnung muss bestätigt werden';
+  $state['directory_selection_ready'] = $all_mapped;
+}
+
+function bratonien_tools_nc_wizard_finish_data_access_for_selection(array &$state, array $known_storages)
+{
+  bratonien_tools_nc_wizard_finish_data_access($state);
+  bratonien_tools_nc_wizard_prepare_directory_stage($state, $known_storages);
+}
+
+function bratonien_tools_nc_wizard_scan_with_known_database()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  $host_input = trim((string)($_POST['nc_wizard_host'] ?? $state['host_input']));
+  $username = trim((string)($_POST['nc_wizard_user'] ?? $state['username']));
+  $password = array_key_exists('nc_wizard_password', $_POST) ? (string)$_POST['nc_wizard_password'] : (string)$state['_password'];
+
+  $state['step'] = 1;
+  $state['host_input'] = $host_input;
+  $state['username'] = $username;
+  $state['_password'] = $password;
+  bratonien_tools_nc_wizard_store($state);
+
+  if ($username === '' || $password === '') throw new RuntimeException('Nextcloud-Benutzer und Passwort werden für den Scan benötigt.');
+
+  $base_url = '';
+  $status_data = null;
+  foreach (bratonien_tools_nc_wizard_candidate_urls($host_input) as $candidate_url)
+  {
+    try
+    {
+      $response = bratonien_tools_nc_wizard_http($candidate_url.'/status.php');
+      if ($response['status'] < 200 || $response['status'] >= 300) continue;
+      $candidate_status = json_decode($response['body'], true);
+      if (!is_array($candidate_status) || empty($candidate_status['installed'])) continue;
+      $base_url = $candidate_url;
+      $status_data = $candidate_status;
+      break;
+    }
+    catch (Throwable $ignored)
+    {
+    }
+  }
+
+  if ($base_url === '' || !is_array($status_data)) throw new RuntimeException('Unter dieser Adresse konnte keine Nextcloud erreicht werden. HTTP und HTTPS wurden automatisch geprüft.');
+
+  $user_response = bratonien_tools_nc_wizard_http(
+    $base_url.'/ocs/v2.php/cloud/user?format=json',
+    $username,
+    $password,
+    array('OCS-APIRequest: true')
+  );
+  if ($user_response['status'] === 401 || $user_response['status'] === 403) throw new RuntimeException('Nextcloud hat Benutzername oder Passwort abgelehnt.');
+  if ($user_response['status'] < 200 || $user_response['status'] >= 300) throw new RuntimeException('Nextcloud ist erreichbar, aber die Anmeldung konnte nicht geprüft werden.');
+
+  $user_data = bratonien_tools_nc_wizard_ocs_data($user_response['body']);
+  $users = array();
+  $can_list_users = false;
+  try
+  {
+    $users_response = bratonien_tools_nc_wizard_http(
+      $base_url.'/ocs/v2.php/cloud/users?format=json',
+      $username,
+      $password,
+      array('OCS-APIRequest: true')
+    );
+    if ($users_response['status'] >= 200 && $users_response['status'] < 300)
+    {
+      $users_data = bratonien_tools_nc_wizard_ocs_data($users_response['body']);
+      if (isset($users_data['users']) && is_array($users_data['users']))
+      {
+        $users = array_values(array_filter(array_map('strval', $users_data['users'])));
+        sort($users, SORT_NATURAL | SORT_FLAG_CASE);
+        $can_list_users = true;
+      }
+    }
+  }
+  catch (Throwable $ignored)
+  {
+  }
+
+  $resolved_username = trim((string)($user_data['id'] ?? $username));
+  if ($resolved_username === '') $resolved_username = $username;
+  $url_host = (string)parse_url($base_url, PHP_URL_HOST);
+
+  $state = array_merge($state, array(
+    'step'=>2,
+    'scan_ok'=>true,
+    'base_url'=>$base_url,
+    'host_input'=>$host_input,
+    'username'=>$resolved_username,
+    'display_name'=>(string)($user_data['display-name'] ?? $user_data['displayname'] ?? ''),
+    'version'=>(string)($status_data['versionstring'] ?? $status_data['version'] ?? ''),
+    'product'=>(string)($status_data['productname'] ?? 'Nextcloud'),
+    'users'=>$users,
+    'can_list_users'=>$can_list_users,
+    'showcase_user'=>'',
+    'connection_name'=>$url_host !== '' ? $url_host : 'Nextcloud',
+    'scan_message'=>'Nextcloud wurde erkannt und der Benutzerzugriff wurde bestätigt.',
+    '_password'=>$password,
+    'api_status'=>'pending','api_username'=>'','api_error'=>'',
+    'db_host'=>strtolower($url_host),'db_port'=>'5432','db_database'=>'nextcloud','db_user'=>'','db_password_set'=>false,'_db_password'=>'',
+    'source_view'=>'piwigo_showcase_sources','activity_view'=>'piwigo_showcase_activity',
+    'gallery_root'=>rtrim(PHPWG_ROOT_PATH, '/').'/galleries/nextcloud',
+    'storages'=>array(),'storage_candidates'=>array(),
+    'technical_stage'=>'auto_check','technical_source'=>'Automatische Prüfung','technical_error'=>'','technical_complete'=>false,
+    'directory_selection_ready'=>false,
+  ));
+
+  if (!bratonien_tools_nc_wizard_apply_known_database_profile($state))
+  {
+    $state['technical_stage'] = 'database_details';
+    $state['technical_source'] = 'Keine bekannte Reader-Verbindung gefunden';
+    $state['technical_error'] = 'Für diese Nextcloud ist noch keine bekannte Datenbank-Reader-Verbindung gespeichert. Die Nextcloud-Anmeldedaten werden nicht als PostgreSQL-Zugang verwendet.';
+    bratonien_tools_nc_wizard_store($state);
+    return array('message'=>'Nextcloud wurde gefunden. Für den Datenzugriff wird eine separate Reader-Verbindung benötigt.');
+  }
+
+  $known_storages = isset($state['storages']) && is_array($state['storages']) ? $state['storages'] : array();
+  try
+  {
+    bratonien_tools_nc_wizard_finish_data_access_for_selection($state, $known_storages);
+  }
+  catch (Throwable $e)
+  {
+    $state['technical_complete'] = false;
+    $state['technical_stage'] = 'database_details';
+    $state['technical_error'] = $e->getMessage();
+  }
+  bratonien_tools_nc_wizard_store($state);
+
+  if ($state['technical_stage'] === 'database_details') return array('message'=>'Nextcloud wurde gefunden. Die bekannte Reader-Verbindung konnte noch nicht vollständig bestätigt werden.');
+  return array('message'=>'Nextcloud und Datenzugriff wurden bestätigt. Jetzt können die gewünschten Verzeichnisse gewählt werden.');
+}
+
+function bratonien_tools_nc_wizard_save_technical_with_known_database()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if (empty($state['scan_ok'])) throw new RuntimeException('Bitte zuerst Nextcloud erfolgreich scannen.');
+  if (trim((string)($state['db_user'] ?? '')) === '' || (string)($state['_db_password'] ?? '') === '') bratonien_tools_nc_wizard_apply_known_database_profile($state);
+  if (trim((string)($state['db_user'] ?? '')) === '' || (string)($state['_db_password'] ?? '') === '') throw new RuntimeException('Für diese Nextcloud sind noch keine Datenbank-Reader-Zugangsdaten bekannt. Nextcloud-Benutzer und -Passwort werden dafür bewusst nicht verwendet.');
+
+  $known_storages = isset($state['storages']) && is_array($state['storages']) ? $state['storages'] : array();
+  $state['db_host'] = trim((string)($_POST['nc_wizard_db_host'] ?? $state['db_host']));
+  $state['db_port'] = (string)max(1, min(65535, (int)($_POST['nc_wizard_db_port'] ?? $state['db_port'])));
+  $state['db_database'] = trim((string)($_POST['nc_wizard_db_database'] ?? $state['db_database']));
+  if ($state['db_host'] === '' || $state['db_database'] === '') throw new RuntimeException('Die Adresse der Datenbank ist noch unvollständig.');
+
+  try
+  {
+    bratonien_tools_nc_wizard_finish_data_access_for_selection($state, $known_storages);
+    bratonien_tools_nc_wizard_store($state);
+    return array('message'=>'Datenzugriff wurde erfolgreich geprüft. Jetzt können die gewünschten Verzeichnisse gewählt werden.');
+  }
+  catch (Throwable $e)
+  {
+    $state['technical_error'] = $e->getMessage();
+    $state['technical_stage'] = 'database_details';
+    bratonien_tools_nc_wizard_store($state);
+    throw $e;
+  }
+}
+
+function bratonien_tools_nc_wizard_directory_options(array $state)
+{
+  if (empty($state['scan_ok']) || trim((string)($state['db_user'] ?? '')) === '' || (string)($state['_db_password'] ?? '') === '') return array();
+
+  $config = array('host'=>$state['db_host'],'port'=>$state['db_port'],'database'=>$state['db_database'],'user'=>$state['db_user']);
+  $source_view = bratonien_tools_nc_connector_view_name($state['source_view']);
+  $rows = bratonien_tools_nc_connector_psql($config, (string)$state['_db_password'], "SELECT DISTINCT storage_id::text || E'\\t' || COALESCE(source_path, '') FROM ".$source_view." ORDER BY 1");
+
+  $paths = array();
+  foreach (preg_split('/\r\n|\r|\n/', trim($rows)) as $line)
+  {
+    if ($line === '') continue;
+    $parts = explode("\t", $line, 2);
+    if (count($parts) !== 2) continue;
+    $storage_id = trim($parts[0]);
+    $source_path = trim($parts[1], '/');
+    if ($storage_id === '') continue;
+    if (!isset($paths[$storage_id])) $paths[$storage_id] = array();
+    $paths[$storage_id][] = $source_path;
+  }
+
+  $result = array();
+  foreach ((array)($state['storage_candidates'] ?? array()) as $index=>$candidate)
+  {
+    $storage_id = trim((string)($candidate['storage_id'] ?? ''));
+    $mapping_prefix = trim((string)($candidate['source_prefix'] ?? ''), '/');
+    $options = array(''=>'Stammverzeichnis');
+
+    foreach (($paths[$storage_id] ?? array()) as $source_path)
+    {
+      $relative = $source_path;
+      if ($mapping_prefix !== '')
+      {
+        if ($source_path === $mapping_prefix) $relative = '';
+        elseif (strpos($source_path, $mapping_prefix.'/') === 0) $relative = substr($source_path, strlen($mapping_prefix) + 1);
+        else continue;
+      }
+      $relative = trim($relative, '/');
+      if ($relative === '') continue;
+      $segments = explode('/', $relative);
+      $current = '';
+      foreach ($segments as $segment)
+      {
+        if ($segment === '') continue;
+        $current = $current === '' ? $segment : $current.'/'.$segment;
+        $options[$current] = $current;
+      }
+    }
+
+    if (count($options) > 1)
+    {
+      $root = $options[''];
+      unset($options['']);
+      natcasesort($options);
+      $options = array(''=>$root) + $options;
+    }
+
+    $result[] = array(
+      'index'=>(int)$index,
+      'storage_id'=>$storage_id,
+      'mount'=>(string)($candidate['local_mount'] ?? ''),
+      'ready'=>trim((string)($candidate['local_mount'] ?? '')) !== '',
+      'options'=>$options,
+    );
+  }
+  return $result;
+}
+
+function bratonien_tools_nc_wizard_save_mounts_with_directories()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  $candidates = isset($state['storage_candidates']) && is_array($state['storage_candidates']) ? $state['storage_candidates'] : array();
+  if (!$candidates) throw new RuntimeException('Es wurden noch keine Speicherorte erkannt.');
+
+  $mounts = isset($_POST['nc_wizard_storage_mount']) && is_array($_POST['nc_wizard_storage_mount']) ? $_POST['nc_wizard_storage_mount'] : array();
+  $directories = isset($_POST['nc_wizard_directory']) && is_array($_POST['nc_wizard_directory']) ? $_POST['nc_wizard_directory'] : array();
+  $storages = array();
+
+  foreach ($candidates as $index=>$candidate)
+  {
+    $mount = rtrim(trim((string)($candidate['local_mount'] ?? '')), '/');
+    if ($mount === '') $mount = rtrim(trim((string)($mounts[$index] ?? '')), '/');
+    if ($mount === '' || $mount[0] !== '/') throw new RuntimeException('Für einen Speicherort fehlt ein gültiger lokaler Pfad.');
+    if (!is_dir($mount) || !is_readable($mount)) throw new RuntimeException('Der angegebene Speicherort ist nicht vorhanden oder nicht lesbar: '.$mount);
+
+    $selected = isset($directories[$index]) && is_array($directories[$index]) ? $directories[$index] : array();
+    $normalized = array();
+    foreach ($selected as $directory)
+    {
+      $directory = trim((string)$directory, '/');
+      if ($directory === '') continue;
+      if ($directory[0] === '/' || preg_match('#(^|/)\.\.(/|$)#', $directory)) throw new RuntimeException('Ungültige Verzeichnisauswahl.');
+      $normalized[$directory] = true;
+    }
+    if (!$normalized) $normalized[''] = true;
+
+    foreach (array_keys($normalized) as $include_prefix)
+    {
+      $storages[] = array(
+        'storage_id'=>(string)($candidate['storage_id'] ?? ''),
+        'source_prefix'=>trim((string)($candidate['source_prefix'] ?? ''), '/'),
+        'local_mount'=>$mount,
+        'include_prefix'=>$include_prefix,
+      );
+    }
+  }
+
+  $state['storages'] = $storages;
+  $state['technical_complete'] = true;
+  $state['technical_stage'] = 'ready';
+  $state['technical_error'] = '';
+  $state['directory_selection_ready'] = false;
+  bratonien_tools_nc_wizard_store($state);
+  return array('message'=>'Verzeichnisauswahl wurde übernommen.');
+}
+
+function bratonien_tools_nc_wizard_finish_with_directories()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((int)$state['step'] !== 4 || empty($state['technical_complete']) || trim((string)$state['showcase_user']) === '') throw new RuntimeException('Der Assistent ist noch nicht vollständig.');
+
+  if (array_key_exists('nc_wizard_fallback_user', $_POST)) $state['_fallback_user'] = trim((string)$_POST['nc_wizard_fallback_user']);
+  if (array_key_exists('nc_wizard_fallback_password', $_POST)) $state['_fallback_password'] = (string)$_POST['nc_wizard_fallback_password'];
+  bratonien_tools_nc_wizard_store($state);
+
+  $fallback_user = trim((string)$state['_fallback_user']);
+  $fallback_password = (string)$state['_fallback_password'];
+  if (($fallback_user === '') !== ($fallback_password === '')) throw new RuntimeException('Fallback-Benutzer und Fallback-Passwort müssen entweder beide angegeben oder beide leer gelassen werden.');
+  if ($state['api_status'] !== 'ok' && $fallback_user === '') throw new RuntimeException('Da die Piwigo-API übersprungen wurde, ist ein Fallback-Zugang erforderlich.');
+
+  $mapping_lines = array();
+  foreach ((array)$state['storages'] as $storage)
+  {
+    $key = (string)$storage['storage_id'].'|'.trim((string)$storage['source_prefix'], '/').'|'.(string)$storage['local_mount'];
+    $mapping_lines[$key] = (string)$storage['storage_id'].' | '.trim((string)$storage['source_prefix'], '/').' | '.(string)$storage['local_mount'];
+  }
+
+  $_POST['nc_name']=(string)$state['connection_name'];$_POST['nc_host']=(string)$state['db_host'];$_POST['nc_port']=(string)$state['db_port'];$_POST['nc_database']=(string)$state['db_database'];$_POST['nc_user']=(string)$state['db_user'];$_POST['nc_db_password']=(string)$state['_db_password'];
+  $_POST['nc_source_view']=(string)$state['source_view'];$_POST['nc_activity_view']=(string)$state['activity_view'];$_POST['nc_gallery_root']=(string)$state['gallery_root'];$_POST['nc_storages']=implode("\n",array_values($mapping_lines));
+  $_POST['nc_quiet_seconds']='120';$_POST['nc_max_wait_seconds']='900';$_POST['nc_full_sync_seconds']='86400';$_POST['nc_piwigo_user']=$fallback_user;$_POST['nc_piwigo_password']=$fallback_password;
+  $_POST['nc_nextcloud_url']=(string)$state['base_url'];$_POST['nc_showcase_user']=(string)$state['showcase_user'];$_POST['nc_access_user']=(string)$state['username'];$_POST['nc_product']=(string)$state['product'];$_POST['nc_version']=(string)$state['version'];$_POST['nc_api_validated']=$state['api_status']==='ok'?'1':'0';
+
+  $result = bratonien_tools_nc_connector_create_local_api_first();
+  $connection_id = (int)($result['connection_id'] ?? 0);
+  if ($connection_id < 1) throw new RuntimeException('Die neue Verbindung konnte nicht gespeichert werden.');
+
+  $connection = bratonien_tools_nc_connector_connection($connection_id, false);
+  if (!$connection) throw new RuntimeException('Die neue Verbindung konnte nach dem Anlegen nicht gelesen werden.');
+  $config = $connection['config'];
+  $config['storages'] = array_values($state['storages']);
+  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($config_json)) throw new RuntimeException('Die Verzeichnisauswahl konnte nicht serialisiert werden.');
+  $table = bratonien_tools_nc_connector_table();
+  pwg_query("UPDATE `$table` SET config_json='".pwg_db_real_escape_string($config_json)."' WHERE id=".$connection_id." LIMIT 1");
+
+  try
+  {
+    if ($state['api_status'] === 'ok') bratonien_tools_nc_api_credentials_store((string)$state['_api_key_id'], (string)$state['_api_key_secret']);
+  }
+  catch (Throwable $e)
+  {
+    pwg_query("DELETE FROM `$table` WHERE id=".$connection_id." LIMIT 1");
+    throw new RuntimeException('Die Verbindung wurde nicht übernommen, weil der geprüfte API-Zugang nicht gespeichert werden konnte: '.$e->getMessage());
+  }
+
+  unset($_SESSION['bratonien_nc_wizard']);
+  unset($result['connection_id']);
+  $result['message'] = 'Verbindung wurde vollständig durch den Assistenten angelegt. '.$result['message'];
+  return $result;
+}

include/nc_connector_wizard_flow.inc.php

@@ -0,0 +1,10 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_wizard_save_technical_flow()
+{
+  return bratonien_tools_nc_wizard_save_technical_generic();
+}

include/nc_connector_wizard_user_scope.inc.php

@@ -0,0 +1,499 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_wizard_webdav_list(array $state, $path = '')
+{
+  if (empty($state['scan_ok']) || trim((string)$state['base_url']) === '' || trim((string)$state['username']) === '' || (string)$state['_password'] === '')
+  {
+    throw new RuntimeException('Die Nextcloud-Sitzung des Assistenten ist nicht vollständig.');
+  }
+  if (!function_exists('curl_init')) throw new RuntimeException('cURL ist für die Verzeichnisauswahl nicht verfügbar.');
+
+  $path = trim((string)$path, '/');
+  if ($path !== '' && preg_match('#(^|/)\.\.(/|$)#', $path)) throw new RuntimeException('Ungültiger Verzeichnispfad.');
+
+  $segments = $path === '' ? array() : array_map('rawurlencode', explode('/', $path));
+  $user = rawurlencode((string)$state['username']);
+  $url = rtrim((string)$state['base_url'], '/').'/remote.php/dav/files/'.$user.'/'.implode('/', $segments);
+  if (substr($url, -1) !== '/') $url .= '/';
+
+  $body = '<?xml version="1.0"?><d:propfind xmlns:d="DAV:" xmlns:oc="http://owncloud.org/ns"><d:prop><d:resourcetype/><d:displayname/><oc:fileid/></d:prop></d:propfind>';
+  $ch = curl_init($url);
+  curl_setopt_array($ch, array(
+    CURLOPT_RETURNTRANSFER=>true,
+    CURLOPT_CUSTOMREQUEST=>'PROPFIND',
+    CURLOPT_POSTFIELDS=>$body,
+    CURLOPT_HTTPHEADER=>array('Depth: 1','Content-Type: application/xml; charset=utf-8'),
+    CURLOPT_HTTPAUTH=>CURLAUTH_BASIC,
+    CURLOPT_USERPWD=>(string)$state['username'].':'.(string)$state['_password'],
+    CURLOPT_CONNECTTIMEOUT=>8,
+    CURLOPT_TIMEOUT=>20,
+  ));
+  $response = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $status = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  curl_close($ch);
+
+  if ($response === false || $errno !== 0) throw new RuntimeException('Nextcloud-Verzeichnisse konnten nicht geladen werden.');
+  if ($status === 401 || $status === 403) throw new RuntimeException('Nextcloud hat den Zugriff auf dieses Verzeichnis abgelehnt.');
+  if ($status !== 207) throw new RuntimeException('Nextcloud-Verzeichnisabfrage antwortete mit HTTP '.$status.'.');
+
+  libxml_use_internal_errors(true);
+  $xml = simplexml_load_string((string)$response);
+  if ($xml === false) throw new RuntimeException('Nextcloud hat eine ungültige WebDAV-Antwort geliefert.');
+  $xml->registerXPathNamespace('d', 'DAV:');
+  $xml->registerXPathNamespace('oc', 'http://owncloud.org/ns');
+
+  $children = array();
+  $fileids = array();
+  $current_fileid = 0;
+  $base_path = (string)parse_url($url, PHP_URL_PATH);
+
+  foreach ($xml->xpath('//d:response') as $item)
+  {
+    $item->registerXPathNamespace('d', 'DAV:');
+    $item->registerXPathNamespace('oc', 'http://owncloud.org/ns');
+    $hrefs = $item->xpath('d:href');
+    $collections = $item->xpath('d:propstat/d:prop/d:resourcetype/d:collection');
+    $ids = $item->xpath('d:propstat/d:prop/oc:fileid');
+    if (!$hrefs || !$collections || !$ids) continue;
+
+    $fileid = (int)trim((string)$ids[0]);
+    if ($fileid < 1) continue;
+    $href = rawurldecode((string)$hrefs[0]);
+    $href_path = (string)parse_url($href, PHP_URL_PATH);
+
+    if (rtrim($href_path, '/') === rtrim($base_path, '/'))
+    {
+      $current_fileid = $fileid;
+      continue;
+    }
+
+    $name = basename(rtrim($href_path, '/'));
+    if ($name === '') continue;
+    $child_path = $path === '' ? $name : $path.'/'.$name;
+    $children[$child_path] = $name;
+    $fileids[$child_path] = $fileid;
+  }
+  natcasesort($children);
+
+  if ($current_fileid < 1) throw new RuntimeException('Nextcloud hat für das aktuelle Verzeichnis keine eindeutige Datei-ID geliefert.');
+
+  $parent = '';
+  if ($path !== '')
+  {
+    $parts = explode('/', $path);
+    array_pop($parts);
+    $parent = implode('/', $parts);
+  }
+
+  return array(
+    'current'=>$path,
+    'parent'=>$parent,
+    'children'=>$children,
+    'current_fileid'=>$current_fileid,
+    'fileids'=>$fileids,
+  );
+}
+
+function bratonien_tools_nc_wizard_refresh_directory_state(array &$state, $path = null)
+{
+  if ($path === null) $path = (string)($state['directory_path'] ?? '');
+  $listing = bratonien_tools_nc_wizard_webdav_list($state, $path);
+  $state['directory_path'] = (string)$listing['current'];
+  $state['directory_parent'] = (string)$listing['parent'];
+  $state['directory_children'] = (array)$listing['children'];
+  $state['directory_current_fileid'] = (int)$listing['current_fileid'];
+  $state['directory_fileids'] = (array)$listing['fileids'];
+  if (!isset($state['directory_selected']) || !is_array($state['directory_selected'])) $state['directory_selected'] = array();
+  if (!isset($state['directory_selected_fileids']) || !is_array($state['directory_selected_fileids'])) $state['directory_selected_fileids'] = array();
+}
+
+function bratonien_tools_nc_wizard_generic_db_config(array $state)
+{
+  return array(
+    'host'=>(string)$state['db_host'],
+    'port'=>(string)$state['db_port'],
+    'database'=>(string)$state['db_database'],
+    'user'=>(string)$state['db_user'],
+  );
+}
+
+function bratonien_tools_nc_wizard_verify_generic_data_access(array &$state)
+{
+  $config = bratonien_tools_nc_wizard_generic_db_config($state);
+  $password = (string)$state['_db_password'];
+  if (trim((string)$config['user']) === '' || $password === '') throw new RuntimeException('Die gespeicherte Reader-Verbindung ist unvollständig.');
+
+  bratonien_tools_nc_connector_psql($config, $password, 'SELECT 1');
+  bratonien_tools_nc_connector_psql($config, $password, 'SELECT 1 FROM piwigo_connector_files LIMIT 1');
+  bratonien_tools_nc_connector_psql($config, $password, 'SELECT 1 FROM piwigo_connector_activity LIMIT 1');
+
+  $state['source_view'] = 'piwigo_connector_files';
+  $state['activity_view'] = 'piwigo_connector_activity';
+  $state['source_mode'] = 'selected-fileids';
+  $state['storages'] = array();
+  $state['storage_candidates'] = array();
+  $state['roots'] = array();
+  $state['technical_complete'] = false;
+  $state['technical_stage'] = 'mounts';
+  $state['technical_source'] = 'Generische Reader-Schnittstelle geprüft';
+  $state['technical_error'] = '';
+  $state['directory_selection_ready'] = true;
+}
+
+function bratonien_tools_nc_wizard_known_adapter($storage_id, $source_path)
+{
+  $storage_id = trim((string)$storage_id);
+  $source_path = trim((string)$source_path, '/');
+  $matches = array();
+
+  foreach (bratonien_tools_nc_connector_connections() as $connection)
+  {
+    foreach ((array)($connection['config']['storages'] ?? array()) as $storage)
+    {
+      if ((string)($storage['storage_id'] ?? '') !== $storage_id) continue;
+      $prefix = trim((string)($storage['source_prefix'] ?? ''), '/');
+      if ($prefix !== '' && $source_path !== $prefix && strpos($source_path, $prefix.'/') !== 0) continue;
+      $mount = rtrim(trim((string)($storage['local_mount'] ?? '')), '/');
+      if ($mount === '' || !is_dir($mount) || !is_readable($mount)) continue;
+      $key = $prefix.'|'.$mount;
+      $matches[$key] = array('storage_id'=>$storage_id,'source_prefix'=>$prefix,'local_mount'=>$mount);
+    }
+  }
+
+  if (!$matches) return null;
+  $max = -1;
+  foreach ($matches as $match) $max = max($max, strlen((string)$match['source_prefix']));
+  $best = array_values(array_filter($matches, function($match) use ($max) { return strlen((string)$match['source_prefix']) === $max; }));
+  return count($best) === 1 ? $best[0] : null;
+}
+
+function bratonien_tools_nc_wizard_resolve_selected_roots(array &$state)
+{
+  $selected = isset($state['directory_selected']) && is_array($state['directory_selected']) ? $state['directory_selected'] : array();
+  $selected_fileids = isset($state['directory_selected_fileids']) && is_array($state['directory_selected_fileids']) ? $state['directory_selected_fileids'] : array();
+  if (!$selected) throw new RuntimeException('Bitte mindestens ein Nextcloud-Verzeichnis auswählen.');
+
+  $ids = array();
+  foreach ($selected as $path)
+  {
+    if (!isset($selected_fileids[$path]) || (int)$selected_fileids[$path] < 1) throw new RuntimeException('Für eine Auswahl fehlt die eindeutige Nextcloud-Datei-ID. Bitte das Verzeichnis erneut auswählen.');
+    $ids[(int)$selected_fileids[$path]] = (string)$path;
+  }
+
+  $config = bratonien_tools_nc_wizard_generic_db_config($state);
+  $id_list = implode(',', array_map('intval', array_keys($ids)));
+  $rows = bratonien_tools_nc_connector_psql(
+    $config,
+    (string)$state['_db_password'],
+    "SELECT fileid::text || E'\\t' || storage_id || E'\\t' || COALESCE(source_path, '') FROM piwigo_connector_files WHERE fileid IN (".$id_list.") ORDER BY fileid"
+  );
+
+  $resolved = array();
+  foreach (preg_split('/\r\n|\r|\n/', trim($rows)) as $line)
+  {
+    if ($line === '') continue;
+    $parts = explode("\t", $line, 3);
+    if (count($parts) !== 3 || !ctype_digit($parts[0])) continue;
+    $resolved[(int)$parts[0]] = array('storage_id'=>(string)$parts[1], 'source_path'=>trim((string)$parts[2], '/'));
+  }
+
+  $roots = array();
+  $candidates = array();
+  foreach ($ids as $fileid=>$path)
+  {
+    if (!isset($resolved[$fileid])) throw new RuntimeException('Das ausgewählte Nextcloud-Verzeichnis mit Datei-ID '.$fileid.' konnte nicht mehr aufgelöst werden.');
+    $storage_id = trim((string)$resolved[$fileid]['storage_id']);
+    $source_path = trim((string)$resolved[$fileid]['source_path'], '/');
+    if ($storage_id === '') throw new RuntimeException('Nextcloud hat für Datei-ID '.$fileid.' keine Storage-ID geliefert.');
+
+    $display_name = $path === '' ? ((string)($state['display_name'] ?? '') !== '' ? (string)$state['display_name'] : 'Nextcloud') : basename($path);
+    $roots[] = array(
+      'fileid'=>(int)$fileid,
+      'display_name'=>$display_name,
+      'webdav_path'=>$path,
+      'storage_id'=>$storage_id,
+      'source_path'=>$source_path,
+    );
+
+    $adapter = bratonien_tools_nc_wizard_known_adapter($storage_id, $source_path);
+    if (!$adapter) $adapter = array('storage_id'=>$storage_id,'source_prefix'=>'','local_mount'=>'');
+    $key = $adapter['storage_id'].'|'.$adapter['source_prefix'].'|'.$adapter['local_mount'];
+    $candidates[$key] = $adapter;
+  }
+
+  $state['roots'] = array_values($roots);
+  $state['storage_candidates'] = array_values($candidates);
+  $state['storages'] = $state['storage_candidates'];
+
+  $all_mapped = !empty($state['storage_candidates']);
+  foreach ($state['storage_candidates'] as $candidate)
+  {
+    $mount = rtrim(trim((string)($candidate['local_mount'] ?? '')), '/');
+    if ($mount === '' || !is_dir($mount) || !is_readable($mount)) $all_mapped = false;
+  }
+
+  if ($all_mapped)
+  {
+    $state['technical_complete'] = true;
+    $state['technical_stage'] = 'ready';
+    $state['directory_selection_ready'] = false;
+    return;
+  }
+
+  $state['technical_complete'] = false;
+  $state['technical_stage'] = 'mounts';
+  $state['directory_selection_ready'] = false;
+  $state['mount_prompted'] = true;
+}
+
+function bratonien_tools_nc_wizard_scan_user_scoped()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  $host_input = trim((string)($_POST['nc_wizard_host'] ?? $state['host_input']));
+  $username = trim((string)($_POST['nc_wizard_user'] ?? $state['username']));
+  $password = array_key_exists('nc_wizard_password', $_POST) ? (string)$_POST['nc_wizard_password'] : (string)$state['_password'];
+
+  $state['step'] = 1;
+  $state['host_input'] = $host_input;
+  $state['username'] = $username;
+  $state['_password'] = $password;
+  bratonien_tools_nc_wizard_store($state);
+  if ($username === '' || $password === '') throw new RuntimeException('Nextcloud-Benutzer und Passwort werden für den Scan benötigt.');
+
+  $base_url = '';
+  $status_data = null;
+  foreach (bratonien_tools_nc_wizard_candidate_urls($host_input) as $candidate_url)
+  {
+    try
+    {
+      $response = bratonien_tools_nc_wizard_http($candidate_url.'/status.php');
+      if ($response['status'] < 200 || $response['status'] >= 300) continue;
+      $candidate_status = json_decode($response['body'], true);
+      if (!is_array($candidate_status) || empty($candidate_status['installed'])) continue;
+      $base_url = $candidate_url;
+      $status_data = $candidate_status;
+      break;
+    }
+    catch (Throwable $ignored) {}
+  }
+  if ($base_url === '' || !is_array($status_data)) throw new RuntimeException('Unter dieser Adresse konnte keine Nextcloud erreicht werden. HTTP und HTTPS wurden automatisch geprüft.');
+
+  $user_response = bratonien_tools_nc_wizard_http($base_url.'/ocs/v2.php/cloud/user?format=json', $username, $password, array('OCS-APIRequest: true'));
+  if ($user_response['status'] === 401 || $user_response['status'] === 403) throw new RuntimeException('Nextcloud hat Benutzername oder Passwort abgelehnt.');
+  if ($user_response['status'] < 200 || $user_response['status'] >= 300) throw new RuntimeException('Nextcloud ist erreichbar, aber die Anmeldung konnte nicht geprüft werden.');
+
+  $user_data = bratonien_tools_nc_wizard_ocs_data($user_response['body']);
+  $resolved_username = trim((string)($user_data['id'] ?? $username));
+  if ($resolved_username === '') $resolved_username = $username;
+  $url_host = (string)parse_url($base_url, PHP_URL_HOST);
+
+  $state = array_merge($state, array(
+    'step'=>2,'scan_ok'=>true,'base_url'=>$base_url,'host_input'=>$host_input,'username'=>$resolved_username,
+    'display_name'=>(string)($user_data['display-name'] ?? $user_data['displayname'] ?? ''),
+    'version'=>(string)($status_data['versionstring'] ?? $status_data['version'] ?? ''),'product'=>(string)($status_data['productname'] ?? 'Nextcloud'),
+    'users'=>array(),'can_list_users'=>false,'showcase_user'=>$resolved_username,'connection_name'=>$url_host !== '' ? $url_host : 'Nextcloud',
+    'scan_message'=>'Nextcloud wurde erkannt und der Benutzerzugriff wurde bestätigt.','_password'=>$password,
+    'api_status'=>'pending','api_username'=>'','api_error'=>'','db_host'=>strtolower($url_host),'db_port'=>'5432','db_database'=>'nextcloud','db_user'=>'','db_password_set'=>false,'_db_password'=>'',
+    'source_view'=>'piwigo_connector_files','activity_view'=>'piwigo_connector_activity','source_mode'=>'selected-fileids','gallery_root'=>rtrim(PHPWG_ROOT_PATH, '/').'/galleries/nextcloud',
+    'storages'=>array(),'storage_candidates'=>array(),'roots'=>array(),'technical_stage'=>'auto_check','technical_source'=>'Automatische Prüfung','technical_error'=>'','technical_complete'=>false,
+    'directory_selection_ready'=>false,'directory_path'=>'','directory_parent'=>'','directory_children'=>array(),'directory_current_fileid'=>0,'directory_fileids'=>array(),'directory_selected'=>array(),'directory_selected_fileids'=>array(),
+    'database_prompted'=>false,'mount_prompted'=>false,
+  ));
+
+  if (!bratonien_tools_nc_wizard_apply_known_database_profile($state))
+  {
+    $state['technical_stage'] = 'database_details';
+    $state['database_prompted'] = true;
+    $state['technical_source'] = 'Keine bekannte Reader-Verbindung gefunden';
+    $state['technical_error'] = 'Für diese Nextcloud ist noch keine bekannte Datenbank-Reader-Verbindung gespeichert.';
+    bratonien_tools_nc_wizard_store($state);
+    return array('message'=>'Nextcloud wurde gefunden. Für den Datenzugriff wird eine separate Reader-Verbindung benötigt.');
+  }
+
+  try
+  {
+    bratonien_tools_nc_wizard_verify_generic_data_access($state);
+    bratonien_tools_nc_wizard_refresh_directory_state($state, '');
+  }
+  catch (Throwable $e)
+  {
+    $state['technical_complete'] = false;
+    $state['technical_stage'] = 'database_details';
+    $state['database_prompted'] = true;
+    $state['technical_error'] = $e->getMessage().' Die generischen Connector-Views müssen in Nextcloud eingerichtet sein.';
+  }
+  bratonien_tools_nc_wizard_store($state);
+
+  if ($state['technical_stage'] === 'database_details') return array('message'=>'Nextcloud wurde gefunden. Die generische Reader-Schnittstelle konnte noch nicht bestätigt werden.');
+  return array('message'=>'Nextcloud und generischer Datenzugriff wurden bestätigt. Jetzt können die Verzeichnisse des angemeldeten Benutzers gewählt werden.');
+}
+
+function bratonien_tools_nc_wizard_save_technical_generic()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if (empty($state['scan_ok'])) throw new RuntimeException('Bitte zuerst Nextcloud erfolgreich scannen.');
+  if (trim((string)($state['db_user'] ?? '')) === '' || (string)($state['_db_password'] ?? '') === '') bratonien_tools_nc_wizard_apply_known_database_profile($state);
+  if (trim((string)($state['db_user'] ?? '')) === '' || (string)($state['_db_password'] ?? '') === '') throw new RuntimeException('Für diese Nextcloud sind noch keine Datenbank-Reader-Zugangsdaten bekannt.');
+
+  $state['db_host'] = trim((string)($_POST['nc_wizard_db_host'] ?? $state['db_host']));
+  $state['db_port'] = (string)max(1, min(65535, (int)($_POST['nc_wizard_db_port'] ?? $state['db_port'])));
+  $state['db_database'] = trim((string)($_POST['nc_wizard_db_database'] ?? $state['db_database']));
+  if ($state['db_host'] === '' || $state['db_database'] === '') throw new RuntimeException('Die Adresse der Datenbank ist noch unvollständig.');
+
+  try
+  {
+    bratonien_tools_nc_wizard_verify_generic_data_access($state);
+    bratonien_tools_nc_wizard_refresh_directory_state($state, '');
+    bratonien_tools_nc_wizard_store($state);
+    return array('message'=>'Generischer Datenzugriff wurde erfolgreich geprüft. Jetzt können Verzeichnisse ausgewählt werden.');
+  }
+  catch (Throwable $e)
+  {
+    $state['technical_error'] = $e->getMessage();
+    $state['technical_stage'] = 'database_details';
+    $state['database_prompted'] = true;
+    bratonien_tools_nc_wizard_store($state);
+    throw $e;
+  }
+}
+
+function bratonien_tools_nc_wizard_directory_browse()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((int)$state['step'] !== 2 || (string)$state['technical_stage'] !== 'mounts' || empty($state['directory_selection_ready'])) throw new RuntimeException('Die Verzeichnisauswahl ist in diesem Fenster nicht verfügbar.');
+  $path = trim((string)($_POST['nc_wizard_directory_path'] ?? ''), '/');
+  bratonien_tools_nc_wizard_refresh_directory_state($state, $path);
+  bratonien_tools_nc_wizard_store($state);
+  return array('message'=>'Verzeichnis geöffnet.');
+}
+
+function bratonien_tools_nc_wizard_directory_add()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((int)$state['step'] !== 2 || (string)$state['technical_stage'] !== 'mounts' || empty($state['directory_selection_ready'])) throw new RuntimeException('Die Verzeichnisauswahl ist in diesem Fenster nicht verfügbar.');
+  $path = trim((string)($state['directory_path'] ?? ''), '/');
+  $fileid = (int)($state['directory_current_fileid'] ?? 0);
+  if ($fileid < 1) throw new RuntimeException('Für dieses Verzeichnis fehlt die eindeutige Nextcloud-Datei-ID.');
+  $selected = isset($state['directory_selected']) && is_array($state['directory_selected']) ? $state['directory_selected'] : array();
+  if (!in_array($path, $selected, true)) $selected[] = $path;
+  $state['directory_selected'] = array_values($selected);
+  if (!isset($state['directory_selected_fileids']) || !is_array($state['directory_selected_fileids'])) $state['directory_selected_fileids'] = array();
+  $state['directory_selected_fileids'][$path] = $fileid;
+  bratonien_tools_nc_wizard_store($state);
+  return array('message'=>$path === '' ? 'Stammverzeichnis ausgewählt.' : 'Verzeichnis hinzugefügt.');
+}
+
+function bratonien_tools_nc_wizard_directory_remove()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((int)$state['step'] !== 2 || empty($state['directory_selection_ready'])) throw new RuntimeException('Die Verzeichnisauswahl ist in diesem Fenster nicht verfügbar.');
+  $path = trim((string)($_POST['nc_wizard_directory_remove'] ?? ''), '/');
+  $selected = isset($state['directory_selected']) && is_array($state['directory_selected']) ? $state['directory_selected'] : array();
+  $state['directory_selected'] = array_values(array_filter($selected, function($value) use ($path) { return (string)$value !== $path; }));
+  if (isset($state['directory_selected_fileids'][$path])) unset($state['directory_selected_fileids'][$path]);
+  bratonien_tools_nc_wizard_store($state);
+  return array('message'=>'Verzeichnis entfernt.');
+}
+
+function bratonien_tools_nc_wizard_save_mounts_server_side()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((int)$state['step'] !== 2 || (string)$state['technical_stage'] !== 'mounts') throw new RuntimeException('Die Speicher-/Verzeichnisauswahl ist in diesem Fenster nicht verfügbar.');
+
+  if (!empty($state['directory_selection_ready']))
+  {
+    bratonien_tools_nc_wizard_resolve_selected_roots($state);
+    bratonien_tools_nc_wizard_store($state);
+    return array('message'=>!empty($state['technical_complete']) ? 'Verzeichnisse und vorhandene Storage-Adapter wurden übernommen.' : 'Verzeichnisse wurden aufgelöst. Ein neuer Storage-Adapter muss noch zugeordnet werden.');
+  }
+
+  $candidates = isset($state['storage_candidates']) && is_array($state['storage_candidates']) ? $state['storage_candidates'] : array();
+  if (!$candidates) throw new RuntimeException('Es wurden noch keine Speicherorte aus der Verzeichnisauswahl aufgelöst.');
+  $mounts = isset($_POST['nc_wizard_storage_mount']) && is_array($_POST['nc_wizard_storage_mount']) ? $_POST['nc_wizard_storage_mount'] : array();
+
+  foreach ($candidates as $index=>&$candidate)
+  {
+    $mount = rtrim(trim((string)($candidate['local_mount'] ?? '')), '/');
+    if ($mount === '') $mount = rtrim(trim((string)($mounts[$index] ?? '')), '/');
+    if ($mount === '' || $mount[0] !== '/') throw new RuntimeException('Für einen Speicherort fehlt ein gültiger lokaler Pfad.');
+    if (!is_dir($mount) || !is_readable($mount)) throw new RuntimeException('Der angegebene Speicherort ist nicht vorhanden oder nicht lesbar: '.$mount);
+    $candidate['local_mount'] = $mount;
+  }
+  unset($candidate);
+
+  $state['storage_candidates'] = array_values($candidates);
+  $state['storages'] = $state['storage_candidates'];
+  $state['technical_complete'] = true;
+  $state['technical_stage'] = 'ready';
+  $state['technical_error'] = '';
+  $state['directory_selection_ready'] = false;
+  bratonien_tools_nc_wizard_store($state);
+  return array('message'=>'Storage-Adapter wurde geprüft. Die Verbindung ist technisch vollständig.');
+}
+
+function bratonien_tools_nc_wizard_select_current_user()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if (empty($state['scan_ok'])) throw new RuntimeException('Bitte zuerst Nextcloud erfolgreich scannen.');
+  if (empty($state['technical_complete'])) throw new RuntimeException('Die Verbindung ist noch nicht vollständig geprüft.');
+  $connection_name = trim((string)($_POST['nc_wizard_connection_name'] ?? $state['connection_name']));
+  if ($connection_name === '') throw new RuntimeException('Bitte einen Namen für die Verbindung angeben.');
+  $state['connection_name'] = $connection_name;
+  $state['showcase_user'] = (string)$state['username'];
+  $state['step'] = 3;
+  $state['api_error'] = '';
+  bratonien_tools_nc_wizard_store($state);
+  return array('message'=>'Nextcloud-Benutzer übernommen. Jetzt folgt der Piwigo-API-Zugang.');
+}
+
+function bratonien_tools_nc_wizard_back()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  $step = (int)($state['step'] ?? 1);
+  if ($step <= 1) return array('message'=>'Bereits am Anfang des Assistenten.');
+
+  if ($step === 4)
+  {
+    $state['step'] = 3;
+  }
+  elseif ($step === 3)
+  {
+    $state['step'] = 2;
+    $state['technical_complete'] = true;
+    $state['technical_stage'] = 'ready';
+    $state['directory_selection_ready'] = false;
+  }
+  elseif (!empty($state['technical_complete']))
+  {
+    $state['technical_complete'] = false;
+    $state['technical_stage'] = 'mounts';
+    $state['directory_selection_ready'] = true;
+    bratonien_tools_nc_wizard_refresh_directory_state($state);
+  }
+  elseif ((string)($state['technical_stage'] ?? '') === 'mounts' && !empty($state['directory_selection_ready']))
+  {
+    if (!empty($state['database_prompted'])) $state['technical_stage'] = 'database_details'; else $state['step'] = 1;
+    $state['directory_selection_ready'] = false;
+  }
+  elseif ((string)($state['technical_stage'] ?? '') === 'mounts')
+  {
+    $state['directory_selection_ready'] = true;
+    bratonien_tools_nc_wizard_refresh_directory_state($state);
+  }
+  elseif ((string)($state['technical_stage'] ?? '') === 'database_details')
+  {
+    $state['step'] = 1;
+  }
+  else
+  {
+    $state['step'] = 1;
+  }
+
+  bratonien_tools_nc_wizard_store($state);
+  return array('message'=>'Ein Fenster zurück.');
+}

include/nc_connector_wizard_webdav_flow.inc.php

@@ -0,0 +1,207 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_wizard_scan_webdav_first()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  $host_input = trim((string)($_POST['nc_wizard_host'] ?? $state['host_input']));
+  $username = trim((string)($_POST['nc_wizard_user'] ?? $state['username']));
+  $password = array_key_exists('nc_wizard_password', $_POST) ? (string)$_POST['nc_wizard_password'] : (string)$state['_password'];
+
+  $state['step'] = 1;
+  $state['host_input'] = $host_input;
+  $state['username'] = $username;
+  $state['_password'] = $password;
+  bratonien_tools_nc_wizard_store($state);
+
+  if ($username === '' || $password === '')
+  {
+    throw new RuntimeException('Nextcloud-Benutzer und Passwort werden für den Scan benötigt.');
+  }
+
+  $base_url = '';
+  $status_data = null;
+  foreach (bratonien_tools_nc_wizard_candidate_urls($host_input) as $candidate_url)
+  {
+    try
+    {
+      $response = bratonien_tools_nc_wizard_http($candidate_url.'/status.php');
+      if ($response['status'] < 200 || $response['status'] >= 300) continue;
+      $candidate_status = json_decode($response['body'], true);
+      if (!is_array($candidate_status) || empty($candidate_status['installed'])) continue;
+      $base_url = $candidate_url;
+      $status_data = $candidate_status;
+      break;
+    }
+    catch (Throwable $ignored) {}
+  }
+
+  if ($base_url === '' || !is_array($status_data))
+  {
+    throw new RuntimeException('Unter dieser Adresse konnte keine Nextcloud erreicht werden. HTTP und HTTPS wurden automatisch geprüft.');
+  }
+
+  $user_response = bratonien_tools_nc_wizard_http(
+    $base_url.'/ocs/v2.php/cloud/user?format=json',
+    $username,
+    $password,
+    array('OCS-APIRequest: true')
+  );
+  if ($user_response['status'] === 401 || $user_response['status'] === 403)
+  {
+    throw new RuntimeException('Nextcloud hat Benutzername oder Passwort abgelehnt.');
+  }
+  if ($user_response['status'] < 200 || $user_response['status'] >= 300)
+  {
+    throw new RuntimeException('Nextcloud ist erreichbar, aber die Anmeldung konnte nicht geprüft werden.');
+  }
+
+  $user_data = bratonien_tools_nc_wizard_ocs_data($user_response['body']);
+  $resolved_username = trim((string)($user_data['id'] ?? $username));
+  if ($resolved_username === '') $resolved_username = $username;
+  $url_host = (string)parse_url($base_url, PHP_URL_HOST);
+
+  $state = array_merge($state, array(
+    'step'=>2,
+    'scan_ok'=>true,
+    'base_url'=>$base_url,
+    'host_input'=>$host_input,
+    'username'=>$resolved_username,
+    'display_name'=>(string)($user_data['display-name'] ?? $user_data['displayname'] ?? ''),
+    'version'=>(string)($status_data['versionstring'] ?? $status_data['version'] ?? ''),
+    'product'=>(string)($status_data['productname'] ?? 'Nextcloud'),
+    'users'=>array(),
+    'can_list_users'=>false,
+    'showcase_user'=>$resolved_username,
+    'connection_name'=>$url_host !== '' ? $url_host : 'Nextcloud WebDAV',
+    'scan_message'=>'Nextcloud und WebDAV-Zugriff wurden bestätigt.',
+    '_password'=>$password,
+    'source_mode'=>'webdav-placeholder',
+    'transport'=>'webdav',
+    'gallery_root'=>rtrim(PHPWG_ROOT_PATH, '/').'/galleries',
+    'storages'=>array(),
+    'storage_candidates'=>array(),
+    'roots'=>array(),
+    'technical_stage'=>'mounts',
+    'technical_source'=>'WebDAV',
+    'technical_error'=>'',
+    'technical_complete'=>false,
+    'directory_selection_ready'=>true,
+    'directory_path'=>'',
+    'directory_parent'=>'',
+    'directory_children'=>array(),
+    'directory_current_fileid'=>0,
+    'directory_fileids'=>array(),
+    'directory_selected'=>array(),
+    'directory_selected_fileids'=>array(),
+    'database_prompted'=>false,
+    'mount_prompted'=>false,
+    'api_status'=>'pending',
+    'api_username'=>'',
+    'api_error'=>'',
+  ));
+
+  bratonien_tools_nc_wizard_refresh_directory_state($state, '');
+  bratonien_tools_nc_wizard_store($state);
+
+  return array('message'=>'Nextcloud und WebDAV wurden bestätigt. Jetzt können die Verzeichnisse des angemeldeten Benutzers ausgewählt werden.');
+}
+
+function bratonien_tools_nc_wizard_save_sources_dispatch()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((string)($state['source_mode'] ?? '') !== 'webdav-placeholder')
+  {
+    return bratonien_tools_nc_wizard_save_mounts_server_side();
+  }
+
+  if ((int)($state['step'] ?? 0) !== 2 || empty($state['directory_selection_ready']))
+  {
+    throw new RuntimeException('Die Verzeichnisauswahl ist in diesem Fenster nicht verfügbar.');
+  }
+
+  $selected = isset($state['directory_selected']) && is_array($state['directory_selected'])
+    ? array_values(array_unique(array_map(function($path) { return trim((string)$path, '/'); }, $state['directory_selected'])))
+    : array();
+  $selected = array_values(array_filter($selected, function($path) { return $path !== ''; }));
+  if (!$selected)
+  {
+    throw new RuntimeException('Bitte mindestens ein Nextcloud-Verzeichnis auswählen.');
+  }
+
+  $selected_ids = isset($state['directory_selected_fileids']) && is_array($state['directory_selected_fileids'])
+    ? $state['directory_selected_fileids']
+    : array();
+  $roots = array();
+  foreach ($selected as $path)
+  {
+    $fileid = (int)($selected_ids[$path] ?? 0);
+    if ($fileid < 1)
+    {
+      throw new RuntimeException('Für eine Auswahl fehlt die eindeutige Nextcloud-Datei-ID. Bitte das Verzeichnis erneut auswählen.');
+    }
+    $roots[] = array(
+      'fileid'=>$fileid,
+      'display_name'=>basename($path),
+      'webdav_path'=>$path,
+    );
+  }
+
+  $state['roots'] = $roots;
+  $state['technical_complete'] = true;
+  $state['technical_stage'] = 'ready';
+  $state['technical_source'] = 'WebDAV-Verzeichnisse ausgewählt';
+  $state['technical_error'] = '';
+  $state['directory_selection_ready'] = false;
+  bratonien_tools_nc_wizard_store($state);
+
+  return array('message'=>'WebDAV-Verzeichnisse wurden übernommen. Die Verbindung ist für den parallelen Testweg vorbereitet.');
+}
+
+function bratonien_tools_nc_wizard_finish_dispatch()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((string)($state['source_mode'] ?? '') !== 'webdav-placeholder')
+  {
+    return bratonien_tools_nc_wizard_finish_generic_scope();
+  }
+
+  if ((int)($state['step'] ?? 0) !== 4 || empty($state['technical_complete']))
+  {
+    throw new RuntimeException('Der Assistent ist noch nicht vollständig.');
+  }
+
+  if (array_key_exists('nc_wizard_fallback_user', $_POST)) $state['_fallback_user'] = trim((string)$_POST['nc_wizard_fallback_user']);
+  if (array_key_exists('nc_wizard_fallback_password', $_POST)) $state['_fallback_password'] = (string)$_POST['nc_wizard_fallback_password'];
+  bratonien_tools_nc_wizard_store($state);
+
+  $fallback_user = trim((string)($state['_fallback_user'] ?? ''));
+  $fallback_password = (string)($state['_fallback_password'] ?? '');
+  if (($fallback_user === '') !== ($fallback_password === ''))
+  {
+    throw new RuntimeException('Fallback-Benutzer und Fallback-Passwort müssen entweder beide angegeben oder beide leer gelassen werden.');
+  }
+  if (($state['api_status'] ?? '') !== 'ok' && $fallback_user === '')
+  {
+    throw new RuntimeException('Da die Piwigo-API übersprungen wurde, ist für diese Verbindung ein Fallback-Zugang erforderlich.');
+  }
+
+  if ($fallback_user !== '')
+  {
+    try
+    {
+      bratonien_tools_nc_connector_validate_fallback_credentials($fallback_user, $fallback_password);
+    }
+    catch (Throwable $e)
+    {
+      throw new RuntimeException('Der Piwigo-Fallback wurde nicht gespeichert: '.$e->getMessage());
+    }
+  }
+
+  $result = bratonien_tools_nc_connector_create_webdav_placeholder_from_wizard();
+  unset($_SESSION['bratonien_nc_wizard']);
+  return $result;
+}

include/tool_registry.inc.php

@@ -4,6 +4,23 @@ if (!defined('PHPWG_ROOT_PATH'))
   die('Hacking attempt!');
 }
 
+if (isset($GLOBALS['template']) && is_object($GLOBALS['template']) && method_exists($GLOBALS['template'], 'func_combine_script'))
+{
+  $script_version = function_exists('bratonien_tools_current_version') ? bratonien_tools_current_version() : '0.9.6.15';
+  $GLOBALS['template']->func_combine_script(array(
+    'id'=>'bratonien_nc_connector_edit_v2',
+    'path'=>BRATONIEN_TOOLS_PATH.'js/nc_connector_edit_v2.js',
+    'load'=>'footer',
+    'version'=>$script_version,
+  ));
+  $GLOBALS['template']->func_combine_script(array(
+    'id'=>'bratonien_nc_connector_source_ui',
+    'path'=>BRATONIEN_TOOLS_PATH.'js/nc_connector_source_ui.js',
+    'load'=>'footer',
+    'version'=>$script_version,
+  ));
+}
+
 require_once(BRATONIEN_TOOLS_PATH . 'tools/image_cache.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'tools/watermark.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'tools/watermark_profiles.inc.php');
@@ -22,6 +39,15 @@ require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_auth.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_create_api.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_piwigo_api.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_wizard.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_wizard_db_bridge.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_wizard_user_scope.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_wizard_flow.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_connection_scope.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_generic_scope.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_delete_safe.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_webdav.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_wizard_webdav_flow.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_edit.inc.php');
 
 function bratonien_tools_get_tools()
 {
@@ -47,25 +73,33 @@ function bratonien_tools_get_tools()
     'album_share_regenerate_link' => array('handler' => 'bratonien_tools_regenerate_album_share_link'),
     'album_share_revoke' => array('handler' => 'bratonien_tools_revoke_album_share'),
     'nc_connector_create_local' => array('handler' => 'bratonien_tools_nc_connector_create_local_api_first'),
-    'nc_connector_delete' => array('handler' => 'bratonien_tools_nc_connector_delete'),
+    'nc_connector_create_webdav_parallel' => array('handler' => 'bratonien_tools_nc_connector_create_webdav_placeholder_from_wizard'),
+    'nc_connector_edit_start' => array('handler' => 'bratonien_tools_nc_connector_edit_start'),
+    'nc_connector_migrate_start' => array('handler' => 'bratonien_tools_nc_connector_migrate_start'),
+    'nc_connector_update_local' => array('handler' => 'bratonien_tools_nc_connector_update_local_friendly'),
+    'nc_connector_delete' => array('handler' => 'bratonien_tools_nc_connector_delete_safe'),
     'nc_connector_update_name' => array('handler' => 'bratonien_tools_nc_connector_update_name'),
     'nc_connector_update_technical' => array('handler' => 'bratonien_tools_nc_connector_update_technical'),
-    'nc_connector_wizard_scan' => array('handler' => 'bratonien_tools_nc_wizard_scan'),
+    'nc_connector_wizard_scan' => array('handler' => 'bratonien_tools_nc_wizard_scan_webdav_first'),
-    'nc_connector_wizard_save_technical' => array('handler' => 'bratonien_tools_nc_wizard_save_technical'),
+    'nc_connector_wizard_save_technical' => array('handler' => 'bratonien_tools_nc_wizard_save_technical_flow'),
-    'nc_connector_wizard_save_mounts' => array('handler' => 'bratonien_tools_nc_wizard_save_mounts'),
+    'nc_connector_wizard_directory_browse' => array('handler' => 'bratonien_tools_nc_wizard_directory_browse'),
-    'nc_connector_wizard_select_user' => array('handler' => 'bratonien_tools_nc_wizard_select_user'),
+    'nc_connector_wizard_directory_add' => array('handler' => 'bratonien_tools_nc_wizard_directory_add'),
+    'nc_connector_wizard_directory_remove' => array('handler' => 'bratonien_tools_nc_wizard_directory_remove'),
+    'nc_connector_wizard_save_mounts' => array('handler' => 'bratonien_tools_nc_wizard_save_sources_dispatch'),
+    'nc_connector_wizard_select_user' => array('handler' => 'bratonien_tools_nc_wizard_select_current_user'),
     'nc_connector_wizard_api_test' => array('handler' => 'bratonien_tools_nc_wizard_api_test'),
     'nc_connector_wizard_api_skip' => array('handler' => 'bratonien_tools_nc_wizard_api_skip'),
-    'nc_connector_wizard_finish' => array('handler' => 'bratonien_tools_nc_wizard_finish'),
+    'nc_connector_wizard_finish' => array('handler' => 'bratonien_tools_nc_wizard_finish_dispatch'),
+    'nc_connector_wizard_back' => array('handler' => 'bratonien_tools_nc_wizard_back'),
     'nc_connector_wizard_reset' => array('handler' => 'bratonien_tools_nc_wizard_reset'),
     'nc_connector_import_legacy' => array('handler' => 'bratonien_tools_nc_connector_import_legacy'),
-    'nc_connector_verify' => array('handler' => 'bratonien_tools_nc_connector_verify_managed'),
+    'nc_connector_verify' => array('handler' => 'bratonien_tools_nc_connector_verify_connection_scoped'),
     'nc_connector_prepare_takeover' => array('handler' => 'bratonien_tools_nc_connector_prepare_takeover'),
     'nc_connector_cancel_takeover' => array('handler' => 'bratonien_tools_nc_connector_cancel_takeover'),
     'nc_connector_piwigo_api_test' => array('handler' => 'bratonien_tools_nc_connector_piwigo_api_test'),
     'nc_connector_piwigo_api_delete' => array('handler' => 'bratonien_tools_nc_connector_api_delete'),
-    'nc_connector_fallback_save' => array('handler' => 'bratonien_tools_nc_connector_fallback_save'),
+    'nc_connector_fallback_save' => array('handler' => 'bratonien_tools_nc_connector_fallback_save_scoped'),
-    'nc_connector_fallback_delete' => array('handler' => 'bratonien_tools_nc_connector_fallback_delete'),
+    'nc_connector_fallback_delete' => array('handler' => 'bratonien_tools_nc_connector_fallback_delete_scoped'),
     'nc_connector_fallback_once' => array('handler' => 'bratonien_tools_nc_connector_fallback_once'),
     'self_update_check' => array('handler' => 'bratonien_tools_self_update_check'),
     'self_update_run' => array('handler' => 'bratonien_tools_self_update_run'),

include/webdav_image_runtime.inc.php

@@ -0,0 +1,434 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_webdav_image_source_info($image_id)
+{
+  static $cache = array();
+  $image_id = (int)$image_id;
+  if ($image_id < 1) return null;
+  if (array_key_exists($image_id, $cache)) return $cache[$image_id];
+
+  $result = pwg_query('SELECT path, coi FROM '.IMAGES_TABLE.' WHERE id='.$image_id.' LIMIT 1');
+  if (!pwg_db_num_rows($result)) return $cache[$image_id] = null;
+  $row = pwg_db_fetch_assoc($result);
+  $path = (string)($row['path'] ?? '');
+  if ($path === '') return $cache[$image_id] = null;
+
+  $absolute = $path;
+  if (strpos($absolute, '/') !== 0)
+  {
+    $absolute = PHPWG_ROOT_PATH.ltrim(preg_replace('#^\./#', '', $absolute), '/');
+  }
+  $resolved = realpath($absolute);
+  if ($resolved === false) return $cache[$image_id] = null;
+
+  $normalized = str_replace('\\', '/', $resolved);
+  if (!preg_match('#/nc-webdav-source/connection-([0-9]+)/root-([0-9]+)/(.*)$#', $normalized, $match))
+  {
+    return $cache[$image_id] = null;
+  }
+
+  $connection_id = (int)$match[1];
+  $root_fileid = (int)$match[2];
+  $relative_path = trim((string)$match[3], '/');
+  if ($relative_path === '') return $cache[$image_id] = null;
+
+  $table = defined('BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE')
+    ? BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE
+    : $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+  $connection_result = pwg_query('SELECT config_json FROM `'.$table.'` WHERE id='.$connection_id.' LIMIT 1');
+  if (!pwg_db_num_rows($connection_result)) return $cache[$image_id] = null;
+  $connection_row = pwg_db_fetch_assoc($connection_result);
+  $config = json_decode((string)$connection_row['config_json'], true);
+  if (!is_array($config) || (string)($config['source_mode'] ?? '') !== 'webdav-placeholder')
+  {
+    return $cache[$image_id] = null;
+  }
+
+  $root_path = '';
+  $roots = isset($config['roots']) && is_array($config['roots']) ? $config['roots'] : array();
+  foreach ($roots as $root)
+  {
+    if ((int)($root['fileid'] ?? 0) === $root_fileid)
+    {
+      $root_path = trim((string)($root['webdav_path'] ?? ''), '/');
+      break;
+    }
+  }
+  if ($root_path === '') return $cache[$image_id] = null;
+
+  $webdav_path = $root_path.'/'.$relative_path;
+  $content_type = '';
+  $size = 0;
+  $etag = '';
+
+  $state_dir = rtrim((string)($config['state_dir'] ?? ''), '/');
+  if ($state_dir !== '')
+  {
+    $mapping_file = $state_dir.'/webdav-map.json';
+    if (is_readable($mapping_file))
+    {
+      $mapping = json_decode((string)file_get_contents($mapping_file), true);
+      if (is_array($mapping) && isset($mapping['files']) && is_array($mapping['files']))
+      {
+        $entry = $mapping['files'][$resolved] ?? $mapping['files'][$normalized] ?? null;
+        if (is_array($entry) && (string)($entry['kind'] ?? '') === 'file')
+        {
+          $webdav_path = trim((string)($entry['webdav_path'] ?? $webdav_path), '/');
+          $content_type = (string)($entry['content_type'] ?? '');
+          $size = (int)($entry['size'] ?? 0);
+          $etag = (string)($entry['etag'] ?? '');
+        }
+      }
+    }
+  }
+
+  return $cache[$image_id] = array(
+    'image_id'=>$image_id,
+    'connection_id'=>$connection_id,
+    'webdav_path'=>$webdav_path,
+    'content_type'=>$content_type,
+    'size'=>$size,
+    'etag'=>$etag,
+    'coi'=>$row['coi'] ?? null,
+  );
+}
+
+function bratonien_tools_webdav_image_url($image_id, $preview=false)
+{
+  $info = bratonien_tools_webdav_image_source_info($image_id);
+  if (!$info) return null;
+
+  $url = get_root_url().'plugins/'.BRATONIEN_TOOLS_ID.'/webdav-image.php?id='.(int)$image_id;
+  if ($preview) $url .= '&preview=1';
+  if ($info['etag'] !== '') $url .= '&v='.rawurlencode(substr(sha1($info['etag']), 0, 12));
+  return $url;
+}
+
+function bratonien_tools_webdav_preview_path(array $info)
+{
+  $connection_id = (int)($info['connection_id'] ?? 0);
+  $webdav_path = trim((string)($info['webdav_path'] ?? ''), '/');
+  if ($connection_id < 1 || $webdav_path === '') return null;
+
+  $base = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-preview/connection-'.$connection_id.'/'.sha1($webdav_path);
+  foreach (array('jpg', 'png', 'webp') as $ext)
+  {
+    $path = $base.'.'.$ext;
+    if (is_file($path) && is_readable($path)) return $path;
+  }
+  return null;
+}
+
+function bratonien_tools_webdav_preview_content_type($path)
+{
+  $ext = strtolower(pathinfo((string)$path, PATHINFO_EXTENSION));
+  if ($ext === 'png') return 'image/png';
+  if ($ext === 'webp') return 'image/webp';
+  return 'image/jpeg';
+}
+
+function bratonien_tools_webdav_custom_derivative_params($key)
+{
+  if (!class_exists('DerivativeParams') || !class_exists('SizingParams')) return null;
+  $tokens = explode('_', (string)$key);
+  if (!$tokens) return null;
+
+  $token = array_shift($tokens);
+  $crop = 0;
+  $min_size = null;
+  $parse_size = function($value)
+  {
+    $parts = explode('x', (string)$value, 2);
+    if (count($parts) === 1)
+    {
+      $size = max(1, (int)$parts[0]);
+      return array($size, $size);
+    }
+    return array(max(1, (int)$parts[0]), max(1, (int)$parts[1]));
+  };
+
+  if (isset($token[0]) && $token[0] === 's')
+  {
+    $size = $parse_size(substr($token, 1));
+  }
+  elseif (isset($token[0]) && $token[0] === 'e')
+  {
+    $crop = 1;
+    $size = $min_size = $parse_size(substr($token, 1));
+  }
+  else
+  {
+    if (count($tokens) < 2) return null;
+    $size = $parse_size($token);
+    $crop_token = array_shift($tokens);
+    $min_size = $parse_size(array_shift($tokens));
+    $crop = function_exists('char_to_fraction') ? char_to_fraction($crop_token) : 0;
+  }
+
+  $params = new DerivativeParams(new SizingParams($size, $crop, $min_size));
+  if (class_exists('ImageStdParams')) ImageStdParams::apply_global($params);
+  return $params;
+}
+
+function bratonien_tools_webdav_derivative_variants()
+{
+  $variants = array();
+  if (!class_exists('ImageStdParams')) return $variants;
+
+  foreach (ImageStdParams::get_defined_type_map() as $type => $params)
+  {
+    $variants['standard:'.$type] = $params;
+  }
+  foreach (ImageStdParams::$custom as $custom_key => $last_used)
+  {
+    $params = bratonien_tools_webdav_custom_derivative_params($custom_key);
+    if ($params) $variants['custom:'.$custom_key] = $params;
+  }
+  return $variants;
+}
+
+function bratonien_tools_webdav_generate_derivative($params, $src_image, &$detail=null)
+{
+  global $conf;
+
+  $detail = '';
+  if (!is_object($src_image) || empty($src_image->id))
+  {
+    $detail = 'SrcImage fehlt.';
+    return false;
+  }
+
+  $info = bratonien_tools_webdav_image_source_info((int)$src_image->id);
+  if (!$info)
+  {
+    $detail = 'WebDAV-Quellzuordnung fehlt.';
+    return false;
+  }
+
+  $preview = bratonien_tools_webdav_preview_path($info);
+  if (!$preview)
+  {
+    $detail = 'Vorbereitetes WebDAV-Preview fehlt.';
+    return false;
+  }
+
+  $preview_ext = strtolower(pathinfo($preview, PATHINFO_EXTENSION));
+  if (!in_array($preview_ext, array('jpg', 'jpeg', 'png', 'gif'), true))
+  {
+    $detail = 'Preview-Format '.$preview_ext.' ist für die Piwigo-Bildbibliothek nicht sicher nutzbar.';
+    return false;
+  }
+
+  if (!class_exists('DerivativeImage')) require_once(PHPWG_ROOT_PATH.'include/derivative.inc.php');
+  if (!class_exists('pwg_image')) require_once(PHPWG_ROOT_PATH.'admin/include/image.class.php');
+
+  $derivative = new DerivativeImage($params, $src_image);
+  if ($derivative->same_as_source())
+  {
+    $detail = 'Identisch mit Quelle; kein eigenes Derivat erforderlich.';
+    return true;
+  }
+
+  $target = $derivative->get_path();
+  $derivative_root = PHPWG_ROOT_PATH.PWG_DERIVATIVE_DIR;
+  if ($target === '' || strpos($target, $derivative_root) !== 0)
+  {
+    $detail = 'Ungültiger Derivat-Zielpfad: '.$target;
+    return false;
+  }
+
+  $preview_mtime = @filemtime($preview) ?: 0;
+  if (is_file($target) && is_readable($target) && (@filemtime($target) ?: 0) >= max($preview_mtime, (int)($params->last_mod_time ?? 0)))
+  {
+    $detail = 'Bereits vorhanden.';
+    return true;
+  }
+
+  $directory = dirname($target);
+  $dir_ok = function_exists('mkgetdir') ? mkgetdir($directory) : (is_dir($directory) || @mkdir($directory, 0755, true));
+  if (!$dir_ok || !is_dir($directory))
+  {
+    $detail = 'Derivat-Verzeichnis konnte nicht angelegt werden: '.$directory;
+    return false;
+  }
+
+  $image = null;
+  try
+  {
+    $image = new pwg_image($preview);
+    $original_size = array((int)$image->get_width(), (int)$image->get_height());
+    if ($original_size[0] < 1 || $original_size[1] < 1)
+    {
+      $detail = 'Preview-Abmessungen sind ungültig.';
+      return false;
+    }
+
+    $crop_rect = null;
+    $scaled_size = null;
+    $params->sizing->compute($original_size, $info['coi'] ?? null, $crop_rect, $scaled_size);
+
+    if ($crop_rect)
+    {
+      if (!$image->crop($crop_rect->width(), $crop_rect->height(), $crop_rect->l, $crop_rect->t))
+      {
+        $detail = 'Crop fehlgeschlagen.';
+        return false;
+      }
+    }
+
+    $final_size = $original_size;
+    if ($crop_rect)
+    {
+      $final_size = array($crop_rect->width(), $crop_rect->height());
+    }
+    if ($scaled_size)
+    {
+      if (!$image->resize($scaled_size[0], $scaled_size[1]))
+      {
+        $detail = 'Resize fehlgeschlagen.';
+        return false;
+      }
+      $final_size = array((int)$scaled_size[0], (int)$scaled_size[1]);
+    }
+
+    if (!empty($params->sharpen) && !$image->sharpen($params->sharpen))
+    {
+      $detail = 'Sharpen fehlgeschlagen.';
+      return false;
+    }
+
+    if ($params->will_watermark($final_size))
+    {
+      $wm = ImageStdParams::get_watermark();
+      if (!empty($wm->file))
+      {
+        $wm_path = PHPWG_ROOT_PATH.$wm->file;
+        if (!is_file($wm_path) || !is_readable($wm_path))
+        {
+          $detail = 'Wasserzeichen-Datei fehlt: '.$wm_path;
+          return false;
+        }
+
+        $wm_image = new pwg_image($wm_path);
+        try
+        {
+          $wm_size = array((int)$wm_image->get_width(), (int)$wm_image->get_height());
+          if ($final_size[0] < $wm_size[0] || $final_size[1] < $wm_size[1])
+          {
+            $wm_scaling = SizingParams::classic($final_size[0], $final_size[1]);
+            $tmp = null;
+            $wm_scaled = null;
+            $wm_scaling->compute($wm_size, null, $tmp, $wm_scaled);
+            if ($wm_scaled)
+            {
+              $wm_image->resize($wm_scaled[0], $wm_scaled[1]);
+              $wm_size = array((int)$wm_scaled[0], (int)$wm_scaled[1]);
+            }
+          }
+
+          $x = (int)round(($wm->xpos / 100) * ($final_size[0] - $wm_size[0]));
+          $y = (int)round(($wm->ypos / 100) * ($final_size[1] - $wm_size[1]));
+          $image->compose($wm_image, $x, $y, $wm->opacity);
+
+          if ($wm->xrepeat || $wm->yrepeat)
+          {
+            $xpad = $wm_size[0] + max(30, (int)round($wm_size[0] / 4));
+            $ypad = $wm_size[1] + max(30, (int)round($wm_size[1] / 4));
+            for ($i = -$wm->xrepeat; $i <= $wm->xrepeat; $i++)
+            {
+              for ($j = -$wm->yrepeat; $j <= $wm->yrepeat; $j++)
+              {
+                if (!$i && !$j) continue;
+                $x2 = $x + $i * $xpad;
+                $y2 = $y + $j * $ypad;
+                if ($x2 >= 0 && $x2 + $wm_size[0] < $final_size[0] && $y2 >= 0 && $y2 + $wm_size[1] < $final_size[1])
+                {
+                  $image->compose($wm_image, $x2, $y2, $wm->opacity);
+                }
+              }
+            }
+          }
+        }
+        finally
+        {
+          $wm_image->destroy();
+        }
+      }
+    }
+
+    if (isset($conf['derivatives_strip_metadata_threshold']) && $final_size[0] * $final_size[1] < (int)$conf['derivatives_strip_metadata_threshold'])
+    {
+      $image->strip();
+    }
+
+    $quality = (int)ImageStdParams::$quality;
+    if (isset($params->type) && in_array($params->type, array(IMG_3XLARGE, IMG_4XLARGE), true))
+    {
+      $quality = min($quality, 75);
+    }
+    $image->set_compression_quality($quality);
+
+    $written = $image->write($target);
+    if ($written === false)
+    {
+      $detail = 'Bildbibliothek konnte das Derivat nicht schreiben.';
+      return false;
+    }
+  }
+  catch (Throwable $e)
+  {
+    $detail = get_class($e).': '.$e->getMessage();
+    return false;
+  }
+  finally
+  {
+    if (is_object($image)) $image->destroy();
+  }
+
+  @chmod($target, 0644);
+  clearstatcache(true, $target);
+  $size = @getimagesize($target);
+  if (!is_file($target) || !is_readable($target) || !is_array($size) || empty($size[0]) || empty($size[1]))
+  {
+    $detail = 'Derivatdatei wurde nicht gültig erzeugt: '.$target;
+    return false;
+  }
+
+  $detail = 'Erzeugt: '.$target.' ('.$size[0].'x'.$size[1].').';
+  return true;
+}
+
+function bratonien_tools_filter_webdav_src_url($url, $src_image)
+{
+  if (!is_object($src_image) || empty($src_image->id)) return $url;
+  $webdav_url = bratonien_tools_webdav_image_url((int)$src_image->id, false);
+  return $webdav_url ?: $url;
+}
+
+function bratonien_tools_filter_webdav_derivative_url($url, $params, $src_image, $rel_url)
+{
+  if (!is_object($src_image) || empty($src_image->id)) return $url;
+  $info = bratonien_tools_webdav_image_source_info((int)$src_image->id);
+  if (!$info) return $url;
+
+  try
+  {
+    $derivative = new DerivativeImage($params, $src_image);
+    if (!$derivative->same_as_source())
+    {
+      $path = $derivative->get_path();
+      if ($path !== '' && is_file($path) && is_readable($path)) return $url;
+    }
+  }
+  catch (Throwable $e)
+  {
+    error_log('Bratonien WebDAV derivative lookup #'.(int)$src_image->id.': '.$e->getMessage());
+  }
+
+  $preview_url = bratonien_tools_webdav_image_url((int)$src_image->id, true);
+  return $preview_url ?: $url;
+}

js/admin_tabs.js

@@ -1,6 +1,94 @@
 (function () {
   'use strict';
 
+  function initNcRouteStatus() {
+    var section = document.getElementById('nc-connector');
+    if (!section) return;
+
+    var statusCard = section.querySelector('.bratonien-grid .bratonien-card');
+    if (!statusCard) return;
+
+    var grid = statusCard.querySelector('.bratonien-form-grid');
+    if (!grid) return;
+
+    var routeLabel = document.createElement('span');
+    routeLabel.className = 'bratonien-label';
+    routeLabel.textContent = 'Aktiver Datenweg';
+
+    var routeValue = document.createElement('strong');
+    routeValue.setAttribute('data-nc-route-status', '');
+    routeValue.textContent = 'Noch kein Lauf erfasst';
+
+    var routeTimeLabel = document.createElement('span');
+    routeTimeLabel.className = 'bratonien-label';
+    routeTimeLabel.textContent = 'Datenweg zuletzt';
+
+    var routeTimeValue = document.createElement('strong');
+    routeTimeValue.setAttribute('data-nc-route-time', '');
+    routeTimeValue.textContent = 'Nicht verfügbar';
+
+    grid.appendChild(routeLabel);
+    grid.appendChild(routeValue);
+    grid.appendChild(routeTimeLabel);
+    grid.appendChild(routeTimeValue);
+
+    var detail = document.createElement('p');
+    detail.className = 'bratonien-base-note';
+    detail.setAttribute('data-nc-route-detail', '');
+    detail.textContent = 'Der Datenweg wird nach dem nächsten Connector-Lauf angezeigt.';
+    statusCard.appendChild(detail);
+
+    var basePath = window.location.pathname.replace(/admin\.php.*$/, '');
+    var statusUrl = basePath + '_data/bratonien-tools/nc-connector-status/route-status.json';
+
+    function formatTime(timestamp) {
+      if (!timestamp) return 'Nicht verfügbar';
+      var date = new Date(Number(timestamp) * 1000);
+      if (Number.isNaN(date.getTime())) return 'Nicht verfügbar';
+      return date.toLocaleString('de-DE');
+    }
+
+    function render(data) {
+      var label = data && data.label ? String(data.label) : 'Unbekannt';
+      var route = data && data.route ? String(data.route) : '';
+      routeValue.textContent = label;
+      routeTimeValue.textContent = formatTime(data && data.timestamp);
+
+      if (route === 'webdav') {
+        routeValue.textContent = 'WEBDAV PRIMÄR';
+        detail.textContent = 'Portierung läuft über WebDAV. Legacy wurde in diesem Lauf nicht benutzt.';
+      } else if (route === 'legacy_fallback') {
+        routeValue.textContent = 'LEGACY-FALLBACK AKTIV';
+        detail.textContent = 'WebDAV war nicht erfolgreich. Dieser Lauf wurde über die alte Struktur abgefangen.';
+      } else if (route === 'failed') {
+        routeValue.textContent = 'FEHLER - KEIN ERFOLGREICHER DATENWEG';
+        detail.textContent = data && data.detail ? String(data.detail) : 'WebDAV und Fallback sind fehlgeschlagen.';
+      } else {
+        detail.textContent = data && data.detail ? String(data.detail) : 'Unbekannter Datenweg.';
+      }
+    }
+
+    function refresh() {
+      fetch(statusUrl + '?t=' + Date.now(), {
+        cache: 'no-store',
+        credentials: 'same-origin'
+      })
+        .then(function (response) {
+          if (!response.ok) throw new Error('status unavailable');
+          return response.json();
+        })
+        .then(render)
+        .catch(function () {
+          routeValue.textContent = 'Noch kein Lauf erfasst';
+          routeTimeValue.textContent = 'Nicht verfügbar';
+          detail.textContent = 'Nach dem nächsten Connector-Lauf wird hier WebDAV oder Legacy-Fallback angezeigt.';
+        });
+    }
+
+    refresh();
+    window.setInterval(refresh, 10000);
+  }
+
   function initBratonienTabs() {
     var admin = document.querySelector('.bratonien-admin');
     if (!admin) return;
@@ -113,9 +201,14 @@
     activate(initial, false);
   }
 
-  if (document.readyState === 'loading') {
+  function init() {
-    document.addEventListener('DOMContentLoaded', initBratonienTabs);
-  } else {
     initBratonienTabs();
+    initNcRouteStatus();
+  }
+
+  if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', init);
+  } else {
+    init();
   }
 })();

js/nc_connector_edit_v2.js

@@ -0,0 +1,324 @@
+(function () {
+  'use strict';
+
+  function ready(callback) {
+    if (document.readyState === 'loading') {
+      document.addEventListener('DOMContentLoaded', function () { window.setTimeout(callback, 0); });
+    } else {
+      window.setTimeout(callback, 0);
+    }
+  }
+
+  ready(function () {
+    var section = document.getElementById('nc-connector');
+    if (!section) return;
+
+    var pwgTokenInput = section.querySelector('input[name="pwg_token"]');
+    var pwgToken = pwgTokenInput ? pwgTokenInput.value : '';
+    var modeKey = 'bratonienNcWizardMode';
+
+    function escapeHtml(value) {
+      return String(value == null ? '' : value).replace(/[&<>"']/g, function (c) {
+        return {'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot',"'":'&#039;'}[c];
+      });
+    }
+
+    function setMode(value) {
+      try { sessionStorage.setItem(modeKey, value); } catch (e) {}
+    }
+
+    function postForm(label, tool, id, mode) {
+      var form = document.createElement('form');
+      form.method = 'post';
+      form.style.display = 'inline';
+      form.dataset.ncV2Action = tool;
+      form.innerHTML = '<input type="hidden" name="pwg_token" value="'+escapeHtml(pwgToken)+'">'
+        + '<input type="hidden" name="connection_id" value="'+escapeHtml(id)+'">'
+        + '<button class="buttonLike" type="submit" name="bratonien_tool" value="'+escapeHtml(tool)+'">'+escapeHtml(label)+'</button>';
+      if (mode) form.addEventListener('submit', function () { setMode(mode); }, true);
+      return form;
+    }
+
+    function loadConnection(id) {
+      return fetch('plugins/bratonien_tools/nc-connector-edit-data.php?connection_id='+encodeURIComponent(id)+'&_='+Date.now(), {
+        credentials:'same-origin',
+        cache:'no-store',
+        headers:{'Accept':'application/json'}
+      }).then(function (response) {
+        return response.json().then(function (data) {
+          if (!response.ok) throw new Error(data.error || ('HTTP '+response.status));
+          return data;
+        });
+      });
+    }
+
+    function dialog() {
+      var node = document.getElementById('bratonien-nc-connection-edit-v2');
+      if (node) return node;
+      node = document.createElement('dialog');
+      node.id = 'bratonien-nc-connection-edit-v2';
+      node.className = 'bratonien-edit-dialog';
+      node.innerHTML = '<div class="bratonien-edit-dialog__body">'
+        + '<div style="display:flex;align-items:flex-start;justify-content:space-between;gap:1rem">'
+        + '<div><h4 style="margin:0">Verbindung bearbeiten</h4><p class="bratonien-base-note" style="margin:.35rem 0 0">Alle Daten dieser Verbindung werden hier gepflegt. Eine Migration ist ein eigener Vorgang.</p></div>'
+        + '<button type="button" class="buttonLike" data-edit-v2-close>Schließen</button></div>'
+        + '<div data-edit-v2-content style="margin-top:1rem"></div></div>';
+      document.body.appendChild(node);
+      node.querySelector('[data-edit-v2-close]').addEventListener('click', function () { node.close(); });
+      node.addEventListener('click', function (event) { if (event.target === node) node.close(); });
+      return node;
+    }
+
+    function storageRow(storage) {
+      storage = storage || {};
+      return '<div class="bratonien-storage-row" data-storage-row>'
+        + '<label>Storage-ID<input name="nc_storage_id[]" value="'+escapeHtml(storage.storage_id || '')+'" required></label>'
+        + '<label>Quellordner<input name="nc_source_prefix[]" value="'+escapeHtml(storage.source_prefix || '')+'" placeholder="optional"></label>'
+        + '<label>Lokaler Speicherpfad<input name="nc_local_mount[]" value="'+escapeHtml(storage.local_mount || '')+'" required></label>'
+        + '<button type="button" class="buttonLike" data-remove-storage>Entfernen</button></div>';
+    }
+
+    function clearValidation(form) {
+      [].slice.call(form.querySelectorAll('[aria-invalid="true"]')).forEach(function (field) {
+        field.removeAttribute('aria-invalid');
+        field.style.borderColor = '';
+        field.style.boxShadow = '';
+      });
+      [].slice.call(form.querySelectorAll('[data-edit-v2-field-error]')).forEach(function (node) { node.remove(); });
+      var box = form.querySelector('[data-edit-v2-error-summary]');
+      if (box) box.remove();
+    }
+
+    function fieldNodes(form, fieldName) {
+      return [].slice.call(form.querySelectorAll('[name="'+fieldName.replace(/"/g, '\\"')+'"]'));
+    }
+
+    function showValidation(form, data) {
+      clearValidation(form);
+      var message = (data && data.message) ? data.message : 'Die Verbindung konnte nicht gespeichert werden.';
+      var summary = document.createElement('div');
+      summary.dataset.editV2ErrorSummary = '1';
+      summary.className = 'bratonien-main-cache__warning';
+      summary.style.margin = '0 0 1rem';
+      summary.style.padding = '.75rem';
+      summary.style.border = '1px solid currentColor';
+      summary.innerHTML = '<strong>Speichern fehlgeschlagen:</strong> '+escapeHtml(message);
+      form.insertBefore(summary, form.firstChild);
+
+      var first = null;
+      var fields = data && Array.isArray(data.fields) ? data.fields : [];
+      fields.forEach(function (fieldName) {
+        fieldNodes(form, fieldName).forEach(function (field) {
+          field.setAttribute('aria-invalid', 'true');
+          field.style.borderColor = '#d65a5a';
+          field.style.boxShadow = '0 0 0 1px #d65a5a';
+          if (!first) first = field;
+          var note = document.createElement('span');
+          note.dataset.editV2FieldError = '1';
+          note.className = 'bratonien-main-cache__warning';
+          note.style.display = 'block';
+          note.style.marginTop = '.25rem';
+          note.textContent = message;
+          field.insertAdjacentElement('afterend', note);
+        });
+      });
+
+      if (first) {
+        first.scrollIntoView({block:'center', behavior:'smooth'});
+        window.setTimeout(function () { first.focus(); }, 150);
+      } else {
+        summary.scrollIntoView({block:'center', behavior:'smooth'});
+      }
+    }
+
+    function submitEditor(form, editDialog) {
+      clearValidation(form);
+      if (!form.reportValidity()) return;
+
+      var submit = form.querySelector('button[type="submit"]');
+      if (submit) submit.disabled = true;
+
+      var body = new FormData(form);
+      fetch('plugins/bratonien_tools/nc-connector-edit-save.php', {
+        method:'POST',
+        credentials:'same-origin',
+        cache:'no-store',
+        headers:{'Accept':'application/json'},
+        body:body
+      }).then(function (response) {
+        return response.json().then(function (data) {
+          if (!response.ok || !data.ok) {
+            showValidation(form, data);
+            return;
+          }
+          editDialog.close();
+          window.location.reload();
+        });
+      }).catch(function (error) {
+        showValidation(form, {message:error.message || String(error), fields:[]});
+      }).finally(function () {
+        if (submit) submit.disabled = false;
+      });
+    }
+
+    function openEditor(id) {
+      var editDialog = dialog();
+      var content = editDialog.querySelector('[data-edit-v2-content]');
+      content.innerHTML = '<p class="bratonien-base-note">Verbindung wird geladen …</p>';
+      if (typeof editDialog.showModal === 'function') editDialog.showModal();
+      else editDialog.setAttribute('open', 'open');
+
+      loadConnection(id).then(function (data) {
+        if (data.adapter !== 'local') throw new Error('Diese Ansicht ist nur für die bestehende Legacy-Verbindung vorgesehen.');
+        var legacy = data.legacy || {};
+        var webdav = data.webdav || {};
+        var storages = Array.isArray(legacy.storages) ? legacy.storages : [];
+        var rows = storages.map(storageRow).join('') || storageRow({});
+        var migrationText = webdav.migration_ready
+          ? '<strong>Bereit.</strong> Nextcloud-Zugang und verbindungseigener Piwigo-API-Key sind vollständig gespeichert.'
+          : '<strong>Noch nicht bereit.</strong> Es fehlen: '+escapeHtml((webdav.migration_missing || []).join(', ') || 'WebDAV-Zugangsdaten')+'.';
+
+        content.innerHTML = '<form method="post" data-edit-v2-form>'
+          + '<input type="hidden" name="pwg_token" value="'+escapeHtml(pwgToken)+'">'
+          + '<input type="hidden" name="connection_id" value="'+escapeHtml(data.id)+'">'
+          + '<h5>Verbindung</h5><div class="bratonien-form-grid">'
+          + '<label class="bratonien-label">Name</label><input name="connection_name" value="'+escapeHtml(data.name)+'" required>'
+          + '</div>'
+          + '<h5 style="margin-top:1.2rem">Nextcloud / WebDAV</h5>'
+          + '<p class="bratonien-base-note">Diese Angaben werden für den neuen WebDAV-Weg benötigt und gehören zu genau dieser Verbindung.</p>'
+          + '<div class="bratonien-form-grid">'
+          + '<label class="bratonien-label">Nextcloud-Adresse</label><input name="nc_nextcloud_url" value="'+escapeHtml(webdav.nextcloud_url || '')+'" placeholder="https://cloud.example.de">'
+          + '<label class="bratonien-label">Nextcloud-Benutzer</label><input name="nc_nextcloud_user" value="'+escapeHtml(webdav.nextcloud_user || '')+'" autocomplete="username">'
+          + '<label class="bratonien-label">Nextcloud-Passwort</label><input name="nc_nextcloud_password" type="password" autocomplete="current-password" placeholder="'+(webdav.has_nextcloud_password ? 'gespeichert – leer = unverändert' : 'noch nicht gespeichert')+'">'
+          + '</div>'
+          + '<h5 style="margin-top:1.2rem">Piwigo API dieser Verbindung</h5>'
+          + '<p class="bratonien-base-note">Der API-Key wird verbindungseigen gespeichert und beim Speichern geprüft.</p>'
+          + '<div class="bratonien-form-grid">'
+          + '<label class="bratonien-label">API-Schlüssel-ID</label><input name="nc_connection_api_key_id" value="'+escapeHtml(webdav.api_key_id || '')+'" autocomplete="off">'
+          + '<label class="bratonien-label">API-Geheimnis</label><input name="nc_connection_api_key_secret" type="password" autocomplete="new-password" placeholder="'+(webdav.has_api_key_secret ? 'gespeichert – leer = unverändert' : 'noch nicht gespeichert')+'">'
+          + '</div>'
+          + '<p class="bratonien-base-note"><strong>WebDAV-Migration:</strong> '+migrationText+'</p>'
+          + '<h5 style="margin-top:1.2rem">Bestehender Legacy-Weg</h5><div class="bratonien-form-grid">'
+          + '<label class="bratonien-label">Datenbank-Server</label><input name="nc_host" value="'+escapeHtml(legacy.host)+'" required>'
+          + '<label class="bratonien-label">Port</label><input name="nc_port" type="number" min="1" max="65535" value="'+escapeHtml(legacy.port || 5432)+'" required>'
+          + '<label class="bratonien-label">Datenbank</label><input name="nc_database" value="'+escapeHtml(legacy.database)+'" required>'
+          + '<label class="bratonien-label">Reader-Benutzer</label><input name="nc_user" value="'+escapeHtml(legacy.user)+'" required>'
+          + '<label class="bratonien-label">Reader-Passwort</label><input name="nc_db_password" type="password" autocomplete="new-password" placeholder="'+(legacy.has_db_password ? 'gespeichert – leer = unverändert' : 'noch nicht gespeichert')+'">'
+          + '</div>'
+          + '<h5 style="margin-top:1.2rem">Speicherorte</h5><div data-storage-list>'+rows+'</div>'
+          + '<button type="button" class="buttonLike" data-add-storage>Speicherort hinzufügen</button>'
+          + '<details style="margin-top:1rem"><summary>Erweiterte Legacy-Einstellungen</summary><div class="bratonien-form-grid" style="margin-top:.75rem">'
+          + '<label class="bratonien-label">Source-View</label><input name="nc_source_view" value="'+escapeHtml(legacy.source_view)+'" required>'
+          + '<label class="bratonien-label">Activity-View</label><input name="nc_activity_view" value="'+escapeHtml(legacy.activity_view)+'" required>'
+          + '<label class="bratonien-label">Piwigo-Galerieordner</label><input name="nc_gallery_root" value="'+escapeHtml(legacy.gallery_root)+'" required>'
+          + '<label class="bratonien-label">Ruhezeit (Sek.)</label><input name="nc_quiet_seconds" type="number" min="0" value="'+escapeHtml(legacy.quiet_seconds)+'">'
+          + '<label class="bratonien-label">Maximale Wartezeit (Sek.)</label><input name="nc_max_wait_seconds" type="number" min="60" value="'+escapeHtml(legacy.max_wait_seconds)+'">'
+          + '<label class="bratonien-label">Vollprüfung nach (Sek.)</label><input name="nc_full_sync_seconds" type="number" min="300" value="'+escapeHtml(legacy.full_sync_seconds)+'">'
+          + '</div></details>'
+          + '<div class="bratonien-actions" style="margin-top:1rem"><button class="buttonLike" type="submit">Änderungen prüfen und speichern</button><button class="buttonLike" type="button" data-edit-v2-cancel>Abbrechen</button></div>'
+          + '</form>';
+
+        var form = content.querySelector('[data-edit-v2-form]');
+        form.querySelector('[data-edit-v2-cancel]').addEventListener('click', function () { editDialog.close(); });
+        form.querySelector('[data-add-storage]').addEventListener('click', function () {
+          form.querySelector('[data-storage-list]').insertAdjacentHTML('beforeend', storageRow({}));
+        });
+        form.addEventListener('click', function (event) {
+          var remove = event.target.closest('[data-remove-storage]');
+          if (!remove) return;
+          var row = remove.closest('[data-storage-row]');
+          if (row) row.remove();
+        });
+        form.addEventListener('submit', function (event) {
+          event.preventDefault();
+          event.stopPropagation();
+          submitEditor(form, editDialog);
+        });
+      }).catch(function (error) {
+        content.innerHTML = '<p class="bratonien-main-cache__warning"><strong>Bearbeiten nicht möglich:</strong> '+escapeHtml(error.message || String(error))+'</p>';
+      });
+    }
+
+    function rebuildLocalActions(deleteForm, id, connectionData) {
+      var actions = deleteForm.parentElement;
+      if (!actions) return;
+
+      [].slice.call(actions.querySelectorAll('form')).forEach(function (form) {
+        var migrate = form.querySelector('button[value="nc_connector_migrate_start"]');
+        var editStart = form.querySelector('button[value="nc_connector_edit_start"]');
+        if (migrate || editStart) form.remove();
+      });
+      [].slice.call(actions.children).forEach(function (child) {
+        if (child.tagName === 'BUTTON' && (child.textContent || '').trim() === 'Bearbeiten') child.remove();
+        if (child.dataset && child.dataset.ncMigrationInfo) child.remove();
+      });
+
+      var edit = document.createElement('button');
+      edit.type = 'button';
+      edit.className = 'buttonLike';
+      edit.textContent = 'Bearbeiten';
+      edit.addEventListener('click', function () { openEditor(id); });
+      actions.insertBefore(edit, deleteForm);
+
+      var info = document.createElement('span');
+      info.dataset.ncMigrationInfo = '1';
+      info.className = 'bratonien-base-note';
+      info.textContent = 'WebDAV-Migration wird geprüft …';
+      actions.insertBefore(info, deleteForm);
+
+      var dataPromise = connectionData ? Promise.resolve(connectionData) : loadConnection(id);
+      dataPromise.then(function (data) {
+        var webdav = data.webdav || {};
+        if (webdav.migration_ready) {
+          info.remove();
+          actions.insertBefore(postForm('Auf WebDAV migrieren', 'nc_connector_migrate_start', id, 'migrate'), deleteForm);
+        } else {
+          var missing = (webdav.migration_missing || []).join(', ');
+          info.textContent = 'WebDAV-Migration noch nicht bereit: '+(missing || 'Zugangsdaten fehlen')+'. Zuerst „Bearbeiten“.';
+        }
+      }).catch(function (error) {
+        info.textContent = 'WebDAV-Migration kann nicht geprüft werden: '+(error.message || String(error));
+      });
+    }
+
+    function rebuildRemoteActions(deleteForm, id) {
+      var actions = deleteForm.parentElement;
+      if (!actions) return;
+      [].slice.call(actions.querySelectorAll('form')).forEach(function (form) {
+        var oldEdit = form.querySelector('button[value="nc_connector_edit_start"]');
+        var oldMigrate = form.querySelector('button[value="nc_connector_migrate_start"]');
+        if (oldEdit || oldMigrate) form.remove();
+      });
+      [].slice.call(actions.children).forEach(function (child) {
+        if (child.tagName === 'BUTTON' && (child.textContent || '').trim() === 'Bearbeiten') child.remove();
+        if (child.dataset && child.dataset.ncMigrationInfo) child.remove();
+      });
+      actions.insertBefore(postForm('Bearbeiten', 'nc_connector_edit_start', id, 'edit'), deleteForm);
+    }
+
+    [].slice.call(section.querySelectorAll('button[value="nc_connector_edit_start"]')).forEach(function (button) {
+      var form = button.closest('form');
+      if (form) form.remove();
+    });
+
+    [].slice.call(section.querySelectorAll('button[value="nc_connector_delete"]')).forEach(function (deleteButton) {
+      var deleteForm = deleteButton.closest('form');
+      if (!deleteForm) return;
+      var idInput = deleteForm.querySelector('input[name="connection_id"]');
+      if (!idInput) return;
+      var id = idInput.value;
+
+      loadConnection(id).then(function (data) {
+        if (data.adapter === 'local') rebuildLocalActions(deleteForm, id, data);
+        else rebuildRemoteActions(deleteForm, id);
+      }).catch(function (error) {
+        var actions = deleteForm.parentElement;
+        if (!actions) return;
+        var info = document.createElement('span');
+        info.className = 'bratonien-main-cache__warning';
+        info.textContent = 'Verbindungstyp konnte nicht geladen werden: '+(error.message || String(error));
+        actions.insertBefore(info, deleteForm);
+      });
+    });
+  });
+})();

js/nc_connector_source_ui.js

@@ -0,0 +1,90 @@
+(function () {
+  'use strict';
+
+  function enhanceMigrationButtons(root) {
+    [].slice.call(root.querySelectorAll('button[value="nc_connector_migrate_start"]')).forEach(function (button) {
+      button.textContent = 'Nextcloud-Ordner auswählen & migrieren';
+      button.title = 'Die WebDAV-Quelle wird im Nextcloud-Ordnerbrowser ausgewählt. Der bestehende SMB-/Legacy-Speicher wird nicht als WebDAV-Quelle übernommen.';
+    });
+  }
+
+  function enhanceEditor(root) {
+    var form = root.querySelector('[data-edit-v2-form]');
+    if (!form || form.dataset.sourceUiEnhanced === '1') return;
+    form.dataset.sourceUiEnhanced = '1';
+
+    var headings = [].slice.call(form.querySelectorAll('h5'));
+    var legacyHeading = headings.find(function (node) {
+      return (node.textContent || '').trim() === 'Bestehender Legacy-Weg';
+    });
+    var storageHeading = headings.find(function (node) {
+      return (node.textContent || '').trim() === 'Speicherorte';
+    });
+    var storageList = form.querySelector('[data-storage-list]');
+    var addStorage = form.querySelector('[data-add-storage]');
+
+    if (legacyHeading && !form.querySelector('[data-webdav-source-note]')) {
+      var note = document.createElement('p');
+      note.dataset.webdavSourceNote = '1';
+      note.className = 'bratonien-main-cache__warning';
+      note.innerHTML = '<strong>Wichtig:</strong> Der folgende SMB-/lokale Speicher gehört ausschließlich zum bisherigen Legacy-Fallback. Er wird <strong>nicht</strong> als WebDAV-Quelle übernommen. Die WebDAV-Quellordner werden beim Start der Migration direkt aus Nextcloud angezeigt und ausgewählt.';
+      legacyHeading.insertAdjacentElement('beforebegin', note);
+    }
+
+    if (storageHeading && storageList && addStorage) {
+      storageHeading.textContent = 'Legacy-Speicher (nur Fallback)';
+
+      var details = document.createElement('details');
+      details.dataset.legacyStorageTechnical = '1';
+      details.style.marginTop = '.75rem';
+      var summary = document.createElement('summary');
+      summary.textContent = 'Technische Legacy-Speicherzuordnung bearbeiten';
+      details.appendChild(summary);
+
+      var info = document.createElement('p');
+      info.className = 'bratonien-base-note';
+      info.textContent = 'Diese Felder betreffen nur den alten Fallback-Weg. Für WebDAV werden keine SMB-Adressen oder lokalen Mount-Pfade eingegeben.';
+      details.appendChild(info);
+
+      storageHeading.insertAdjacentElement('beforebegin', details);
+      details.appendChild(storageHeading);
+      details.appendChild(storageList);
+      details.appendChild(addStorage);
+
+      addStorage.textContent = 'Legacy-Speicher manuell hinzufügen';
+      addStorage.title = 'Nur für den alten Legacy-Fallback. WebDAV-Ordner werden im Nextcloud-Ordnerbrowser ausgewählt.';
+    }
+  }
+
+  function enhance(root) {
+    if (!root || root.nodeType !== 1) return;
+    enhanceMigrationButtons(root);
+    if (root.matches && root.matches('#bratonien-nc-connection-edit-v2')) enhanceEditor(root);
+    var dialog = root.querySelector ? root.querySelector('#bratonien-nc-connection-edit-v2') : null;
+    if (dialog) enhanceEditor(dialog);
+  }
+
+  function start() {
+    var section = document.getElementById('nc-connector');
+    if (!section) return;
+
+    enhance(section);
+    enhanceMigrationButtons(document);
+
+    var observer = new MutationObserver(function (mutations) {
+      mutations.forEach(function (mutation) {
+        [].slice.call(mutation.addedNodes || []).forEach(function (node) {
+          if (node && node.nodeType === 1) enhance(node);
+        });
+      });
+      var dialog = document.getElementById('bratonien-nc-connection-edit-v2');
+      if (dialog) enhanceEditor(dialog);
+      enhanceMigrationButtons(document);
+    });
+
+    observer.observe(document.body, {childList:true, subtree:true});
+  }
+
+  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', start);
+  else start();
+})();

main.inc.php

@@ -1,7 +1,7 @@
 <?php
 /*
 Plugin Name: Bratonien Tools
-Version: 0.9.4.2
+Version: 0.9.6.15
 Description: Erweiterbare Administrationswerkzeuge fuer die Bratonien-Piwigo-Installation.
 Plugin URI: https://github.com/Terranom674/Piwigo_Bratonien_Tools
 Author: Bratonien
@@ -16,6 +16,7 @@ define('BRATONIEN_TOOLS_ID', basename(dirname(__FILE__)));
 define('BRATONIEN_TOOLS_PATH', PHPWG_PLUGINS_PATH . BRATONIEN_TOOLS_ID . '/');
 
 require_once(BRATONIEN_TOOLS_PATH . 'include/watermark_runtime.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/webdav_image_runtime.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/public_selection.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/picture_navigation.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/batch_titles.inc.php');
@@ -26,6 +27,8 @@ require_once(BRATONIEN_TOOLS_PATH . 'include/nc_productive_ws.inc.php');
 
 add_event_handler('get_admin_plugin_menu_links', 'bratonien_tools_admin_menu');
 add_event_handler('get_derivative_url', 'bratonien_tools_filter_derivative_url', EVENT_HANDLER_PRIORITY_NEUTRAL, 4);
+add_event_handler('get_src_image_url', 'bratonien_tools_filter_webdav_src_url', EVENT_HANDLER_PRIORITY_NEUTRAL + 50, 2);
+add_event_handler('get_derivative_url', 'bratonien_tools_filter_webdav_derivative_url', EVENT_HANDLER_PRIORITY_NEUTRAL + 50, 4);
 add_event_handler('loc_end_element_set_global', 'bratonien_tools_batch_titles_register_action');
 add_event_handler('element_set_global_action', 'bratonien_tools_batch_titles_apply', EVENT_HANDLER_PRIORITY_NEUTRAL, 2);
 add_event_handler('init', 'bratonien_tools_prepare_connector_private_import', EVENT_HANDLER_PRIORITY_NEUTRAL - 30);

nc-connector-edit-data.php

@@ -0,0 +1,100 @@
+<?php
+$piwigo_root = realpath(dirname(__DIR__, 2));
+if ($piwigo_root === false)
+{
+  http_response_code(500);
+  exit;
+}
+define('PHPWG_ROOT_PATH', rtrim($piwigo_root, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR);
+include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+
+header('Content-Type: application/json; charset=utf-8');
+header('Cache-Control: no-store, max-age=0');
+
+if (!defined('BRATONIEN_TOOLS_PATH'))
+{
+  http_response_code(404);
+  echo json_encode(array('error'=>'Bratonien Tools ist nicht aktiv.'));
+  exit;
+}
+if (!function_exists('is_admin') || !is_admin())
+{
+  http_response_code(403);
+  echo json_encode(array('error'=>'Administratorrechte erforderlich.'));
+  exit;
+}
+
+require_once(BRATONIEN_TOOLS_PATH.'include/nc_connector.inc.php');
+require_once(BRATONIEN_TOOLS_PATH.'include/nc_connector_manage.inc.php');
+require_once(BRATONIEN_TOOLS_PATH.'include/nc_connector_connection_scope.inc.php');
+require_once(BRATONIEN_TOOLS_PATH.'include/nc_connector_edit.inc.php');
+
+$id = (int)($_GET['connection_id'] ?? 0);
+$connection = bratonien_tools_nc_connector_connection($id, true);
+if (!$connection)
+{
+  http_response_code(404);
+  echo json_encode(array('error'=>'Connector-Verbindung wurde nicht gefunden.'));
+  exit;
+}
+
+$config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+$credentials = array();
+$migration = array('ready'=>false, 'missing'=>array());
+try
+{
+  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
+  if ((string)$connection['adapter'] === 'local')
+  {
+    $migration = bratonien_tools_nc_connector_migration_state($connection);
+  }
+}
+catch (Throwable $e)
+{
+  $credentials = array();
+  $migration = array('ready'=>false, 'missing'=>array('gespeicherte Zugangsdaten konnten nicht gelesen werden'));
+}
+
+$storages = array();
+foreach ((array)($config['storages'] ?? array()) as $storage)
+{
+  $storages[] = array(
+    'storage_id'=>(string)($storage['storage_id'] ?? ''),
+    'source_prefix'=>(string)($storage['source_prefix'] ?? ''),
+    'local_mount'=>(string)($storage['local_mount'] ?? ''),
+  );
+}
+
+$payload = array(
+  'id'=>(int)$connection['id'],
+  'name'=>(string)$connection['name'],
+  'adapter'=>(string)$connection['adapter'],
+  'enabled'=>(bool)$connection['enabled'],
+  'takeover_state'=>(string)$connection['takeover_state'],
+  'source_mode'=>(string)($config['source_mode'] ?? ''),
+  'legacy'=>array(
+    'host'=>(string)($config['host'] ?? ''),
+    'port'=>(string)($config['port'] ?? '5432'),
+    'database'=>(string)($config['database'] ?? ''),
+    'user'=>(string)($config['user'] ?? ''),
+    'has_db_password'=>trim((string)($credentials['db_password'] ?? '')) !== '',
+    'source_view'=>(string)($config['source_view'] ?? ''),
+    'activity_view'=>(string)($config['activity_view'] ?? ''),
+    'gallery_root'=>(string)($config['gallery_root'] ?? ''),
+    'quiet_seconds'=>(int)($config['quiet_seconds'] ?? 120),
+    'max_wait_seconds'=>(int)($config['max_wait_seconds'] ?? 900),
+    'full_sync_seconds'=>(int)($config['full_sync_seconds'] ?? 86400),
+    'storages'=>$storages,
+  ),
+  'webdav'=>array(
+    'nextcloud_url'=>(string)($config['nextcloud_url'] ?? ''),
+    'nextcloud_user'=>(string)($credentials['nextcloud_user'] ?? $config['nextcloud_access_user'] ?? $config['access_user'] ?? ''),
+    'has_nextcloud_password'=>(string)($credentials['nextcloud_password'] ?? '') !== '',
+    'api_key_id'=>(string)($credentials['api_key_id'] ?? ''),
+    'has_api_key_secret'=>trim((string)($credentials['api_key_secret'] ?? '')) !== '',
+    'migration_ready'=>!empty($migration['ready']),
+    'migration_missing'=>array_values((array)($migration['missing'] ?? array())),
+  ),
+);
+
+echo json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);

nc-connector-edit-save.php

@@ -0,0 +1,312 @@
+<?php
+$piwigo_root = realpath(dirname(__DIR__, 2));
+if ($piwigo_root === false)
+{
+  http_response_code(500);
+  exit;
+}
+define('PHPWG_ROOT_PATH', rtrim($piwigo_root, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR);
+include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+
+header('Content-Type: application/json; charset=utf-8');
+header('Cache-Control: no-store, max-age=0');
+
+function bratonien_tools_nc_edit_json($status, array $payload)
+{
+  http_response_code((int)$status);
+  echo json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  exit;
+}
+
+function bratonien_tools_nc_edit_fail($message, array $fields = array(), $stage = '', $detail = '')
+{
+  $visible = trim((string)$message);
+  if ($stage !== '') $visible = 'Bereich: '.$stage.' — '.$visible;
+  if ($detail !== '') $visible .= ' Technische Ursache: '.$detail;
+
+  bratonien_tools_nc_edit_json(422, array(
+    'ok'=>false,
+    'message'=>$visible,
+    'stage'=>(string)$stage,
+    'detail'=>(string)$detail,
+    'fields'=>array_values(array_unique($fields)),
+  ));
+}
+
+function bratonien_tools_nc_edit_probe($url, $username = '', $password = '', array $headers = array())
+{
+  if (!function_exists('curl_init'))
+  {
+    return array('ok'=>false, 'http'=>0, 'errno'=>-1, 'error'=>'cURL ist in PHP nicht verfügbar.', 'body'=>'');
+  }
+
+  $ch = curl_init($url);
+  $options = array(
+    CURLOPT_RETURNTRANSFER=>true,
+    CURLOPT_FOLLOWLOCATION=>true,
+    CURLOPT_MAXREDIRS=>3,
+    CURLOPT_CONNECTTIMEOUT=>8,
+    CURLOPT_TIMEOUT=>15,
+    CURLOPT_HTTPHEADER=>array_merge(array('Accept: application/json'), $headers),
+    CURLOPT_USERAGENT=>'Bratonien-Tools-NC-Editor/'.(function_exists('bratonien_tools_current_version') ? bratonien_tools_current_version() : 'dev'),
+  );
+  if ($username !== '')
+  {
+    $options[CURLOPT_HTTPAUTH] = CURLAUTH_BASIC;
+    $options[CURLOPT_USERPWD] = $username.':'.$password;
+  }
+  curl_setopt_array($ch, $options);
+  $body = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $error = curl_error($ch);
+  $http = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  curl_close($ch);
+
+  return array(
+    'ok'=>$body !== false && $errno === 0,
+    'http'=>$http,
+    'errno'=>$errno,
+    'error'=>$error,
+    'body'=>$body === false ? '' : (string)$body,
+  );
+}
+
+if (!defined('BRATONIEN_TOOLS_PATH'))
+{
+  bratonien_tools_nc_edit_json(404, array('ok'=>false, 'message'=>'Bratonien Tools ist nicht aktiv.', 'fields'=>array()));
+}
+if (!function_exists('is_admin') || !is_admin())
+{
+  bratonien_tools_nc_edit_json(403, array('ok'=>false, 'message'=>'Administratorrechte erforderlich.', 'fields'=>array()));
+}
+if (($_SERVER['REQUEST_METHOD'] ?? '') !== 'POST')
+{
+  bratonien_tools_nc_edit_json(405, array('ok'=>false, 'message'=>'Nur POST ist erlaubt.', 'fields'=>array()));
+}
+
+try
+{
+  check_pwg_token();
+  require_once(BRATONIEN_TOOLS_PATH.'include/tool_registry.inc.php');
+
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $connection = bratonien_tools_nc_connector_connection($id, true);
+  if (!$connection)
+  {
+    bratonien_tools_nc_edit_fail('Die zu bearbeitende Verbindung wurde nicht gefunden.', array(), 'Verbindung');
+  }
+
+  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
+
+  $nextcloud_input = trim((string)($_POST['nc_nextcloud_url'] ?? ($config['nextcloud_url'] ?? '')));
+  $nextcloud_user = trim((string)($_POST['nc_nextcloud_user'] ?? ($credentials['nextcloud_user'] ?? '')));
+  $submitted_nc_password = (string)($_POST['nc_nextcloud_password'] ?? '');
+  $nextcloud_password = $submitted_nc_password !== '' ? $submitted_nc_password : (string)($credentials['nextcloud_password'] ?? '');
+
+  $has_any_nextcloud = $nextcloud_input !== '' || $nextcloud_user !== '' || $nextcloud_password !== '';
+  if ($has_any_nextcloud)
+  {
+    $missing = array();
+    if ($nextcloud_input === '') $missing[] = 'nc_nextcloud_url';
+    if ($nextcloud_user === '') $missing[] = 'nc_nextcloud_user';
+    if ($nextcloud_password === '') $missing[] = 'nc_nextcloud_password';
+    if ($missing)
+    {
+      bratonien_tools_nc_edit_fail(
+        'Die WebDAV-Daten sind unvollständig. Adresse, Benutzer und Passwort werden gemeinsam benötigt.',
+        $missing,
+        'Nextcloud / WebDAV'
+      );
+    }
+
+    try
+    {
+      $candidate_urls = bratonien_tools_nc_wizard_candidate_urls($nextcloud_input);
+    }
+    catch (Throwable $e)
+    {
+      bratonien_tools_nc_edit_fail($e->getMessage(), array('nc_nextcloud_url'), 'Nextcloud / WebDAV');
+    }
+
+    $nextcloud_url = '';
+    $last_probe = null;
+    $last_status_url = '';
+    foreach ($candidate_urls as $candidate_url)
+    {
+      $status_url = $candidate_url.'/status.php';
+      $probe = bratonien_tools_nc_edit_probe($status_url);
+      $last_probe = $probe;
+      $last_status_url = $status_url;
+
+      if (!$probe['ok'] || $probe['http'] < 200 || $probe['http'] >= 300)
+      {
+        continue;
+      }
+
+      $status = json_decode($probe['body'], true);
+      if (!is_array($status) || empty($status['installed']))
+      {
+        continue;
+      }
+
+      $nextcloud_url = $candidate_url;
+      break;
+    }
+
+    if ($nextcloud_url === '')
+    {
+      $attempts = array();
+      foreach ($candidate_urls as $candidate_url)
+      {
+        $attempts[] = $candidate_url.'/status.php';
+      }
+      if (is_array($last_probe) && !$last_probe['ok'])
+      {
+        $technical = $last_probe['errno'] >= 0
+          ? 'cURL '.$last_probe['errno'].($last_probe['error'] !== '' ? ': '.$last_probe['error'] : '')
+          : $last_probe['error'];
+        bratonien_tools_nc_edit_fail(
+          'Die Nextcloud-Adresse ist vom Piwigo-Server aus nicht erreichbar. Ohne angegebenes Protokoll wurden HTTPS und HTTP geprüft.',
+          array('nc_nextcloud_url'),
+          'Nextcloud / WebDAV – Erreichbarkeit',
+          $technical.' · Geprüft: '.implode(' ; ', $attempts)
+        );
+      }
+
+      bratonien_tools_nc_edit_fail(
+        'Unter der angegebenen Adresse wurde keine erreichbare installierte Nextcloud gefunden. Ohne angegebenes Protokoll wurden HTTPS und HTTP geprüft.',
+        array('nc_nextcloud_url'),
+        'Nextcloud / WebDAV – Erkennung',
+        'Geprüft: '.implode(' ; ', $attempts).($last_probe ? ' · Letzter HTTP-Status: '.$last_probe['http'] : '')
+      );
+    }
+
+    $_POST['nc_nextcloud_url'] = $nextcloud_url;
+
+    $user_url = $nextcloud_url.'/ocs/v2.php/cloud/user?format=json';
+    $user_probe = bratonien_tools_nc_edit_probe($user_url, $nextcloud_user, $nextcloud_password, array('OCS-APIRequest: true'));
+    if (!$user_probe['ok'])
+    {
+      $technical = $user_probe['errno'] >= 0
+        ? 'cURL '.$user_probe['errno'].($user_probe['error'] !== '' ? ': '.$user_probe['error'] : '')
+        : $user_probe['error'];
+      bratonien_tools_nc_edit_fail(
+        'Die Nextcloud-Anmeldung konnte technisch nicht geprüft werden.',
+        array('nc_nextcloud_url','nc_nextcloud_user','nc_nextcloud_password'),
+        'Nextcloud / WebDAV – Anmeldung',
+        $technical.' · Ziel: '.$user_url
+      );
+    }
+    if ($user_probe['http'] === 401 || $user_probe['http'] === 403)
+    {
+      bratonien_tools_nc_edit_fail(
+        'Nextcloud hat Benutzername oder Passwort abgelehnt.',
+        array('nc_nextcloud_user','nc_nextcloud_password'),
+        'Nextcloud / WebDAV – Anmeldung',
+        'HTTP '.$user_probe['http']
+      );
+    }
+    if ($user_probe['http'] < 200 || $user_probe['http'] >= 300)
+    {
+      bratonien_tools_nc_edit_fail(
+        'Nextcloud ist erreichbar, aber die Benutzerprüfung wurde vom Server abgelehnt.',
+        array('nc_nextcloud_user','nc_nextcloud_password'),
+        'Nextcloud / WebDAV – Anmeldung',
+        'HTTP '.$user_probe['http'].' · Ziel: '.$user_url
+      );
+    }
+    try
+    {
+      bratonien_tools_nc_wizard_ocs_data($user_probe['body']);
+    }
+    catch (Throwable $e)
+    {
+      bratonien_tools_nc_edit_fail(
+        'Nextcloud antwortet auf die Benutzerprüfung, die Antwort ist aber nicht gültig: '.$e->getMessage(),
+        array('nc_nextcloud_user','nc_nextcloud_password'),
+        'Nextcloud / WebDAV – Anmeldung'
+      );
+    }
+  }
+
+  $api_key_id = trim((string)($_POST['nc_connection_api_key_id'] ?? ($credentials['api_key_id'] ?? '')));
+  $submitted_api_secret = trim((string)($_POST['nc_connection_api_key_secret'] ?? ''));
+  $api_key_secret = $submitted_api_secret !== '' ? $submitted_api_secret : trim((string)($credentials['api_key_secret'] ?? ''));
+  if (($api_key_id === '') !== ($api_key_secret === ''))
+  {
+    $missing = $api_key_id === '' ? array('nc_connection_api_key_id') : array('nc_connection_api_key_secret');
+    bratonien_tools_nc_edit_fail(
+      'API-Schlüssel-ID und API-Geheimnis müssen gemeinsam vollständig sein.',
+      $missing,
+      'Piwigo API'
+    );
+  }
+  if ($api_key_id !== '')
+  {
+    try
+    {
+      bratonien_tools_nc_connector_validate_scoped_api($api_key_id, $api_key_secret);
+    }
+    catch (Throwable $e)
+    {
+      bratonien_tools_nc_edit_fail(
+        'Der Piwigo-API-Zugang konnte nicht bestätigt werden: '.$e->getMessage(),
+        array('nc_connection_api_key_id','nc_connection_api_key_secret'),
+        'Piwigo API'
+      );
+    }
+  }
+
+  $result = bratonien_tools_nc_connector_update_local_friendly();
+  bratonien_tools_nc_edit_json(200, array(
+    'ok'=>true,
+    'message'=>(string)($result['message'] ?? 'Verbindung wurde gespeichert.'),
+    'fields'=>array(),
+  ));
+}
+catch (Throwable $e)
+{
+  $message = trim($e->getMessage());
+  if ($message === '') $message = 'Die Verbindung konnte nicht gespeichert werden.';
+
+  $fields = array();
+  $stage = 'Verbindung';
+  $add = function($name) use (&$fields)
+  {
+    if (!in_array($name, $fields, true)) $fields[] = $name;
+  };
+
+  if (stripos($message, 'Name') !== false && stripos($message, 'Datenbankname') === false) $add('connection_name');
+  if (stripos($message, 'Datenbank-Server') !== false) { $add('nc_host'); $stage = 'Legacy-Datenbank'; }
+  if (stripos($message, 'Datenbank-Port') !== false) { $add('nc_port'); $stage = 'Legacy-Datenbank'; }
+  if (stripos($message, 'Datenbankname') !== false) { $add('nc_database'); $stage = 'Legacy-Datenbank'; }
+  if (stripos($message, 'Reader-Benutzer') !== false) { $add('nc_user'); $stage = 'Legacy-Datenbank'; }
+  if (stripos($message, 'Datenbankpasswort') !== false) { $add('nc_db_password'); $stage = 'Legacy-Datenbank'; }
+  if (stripos($message, 'Storage-ID') !== false) { $add('nc_storage_id[]'); $stage = 'Speicherorte'; }
+  if (stripos($message, 'lokaler Pfad') !== false || stripos($message, 'Speicherort') !== false) { $add('nc_local_mount[]'); $stage = 'Speicherorte'; }
+  if (stripos($message, 'Galerieordner') !== false) { $add('nc_gallery_root'); $stage = 'Erweiterte Legacy-Einstellungen'; }
+  if (stripos($message, 'Datenbankansichten') !== false || stripos($message, 'Source-View') !== false) { $add('nc_source_view'); $stage = 'Erweiterte Legacy-Einstellungen'; }
+  if (stripos($message, 'Datenbankansichten') !== false || stripos($message, 'Activity-View') !== false) { $add('nc_activity_view'); $stage = 'Erweiterte Legacy-Einstellungen'; }
+
+  if (stripos($message, 'Nextcloud') !== false)
+  {
+    $stage = 'Nextcloud / WebDAV';
+    if (stripos($message, 'Adresse') !== false) $add('nc_nextcloud_url');
+    if (stripos($message, 'Benutzer') !== false) $add('nc_nextcloud_user');
+    if (stripos($message, 'Passwort') !== false) $add('nc_nextcloud_password');
+  }
+  if (stripos($message, 'API') !== false)
+  {
+    $stage = 'Piwigo API';
+    $add('nc_connection_api_key_id');
+    $add('nc_connection_api_key_secret');
+  }
+
+  bratonien_tools_nc_edit_fail(
+    $message,
+    $fields,
+    $stage,
+    'Interne Prüfung: '.get_class($e)
+  );
+}

nc-connector-install.php

@@ -58,7 +58,6 @@ function decrypt_install_credentials($blob, $hexKey)
   $decoded = json_decode($plain, true);
   if (!is_array($decoded))
   {
-    // Backward compatibility: old connections stored only the DB password.
     return array('db_password'=>$plain,'piwigo_user'=>'','piwigo_password'=>'');
   }
   if (empty($decoded['db_password'])) fail_install('Datenbankpasswort fehlt in den Connector-Zugangsdaten.');
@@ -124,10 +123,13 @@ try
     @unlink($piwigoPasswordPath);
   }
 
-  $storageLines = array('# storage_id<TAB>source_prefix<TAB>local_mount');
+  $storageLines = array('# storage_id<TAB>source_prefix<TAB>local_mount<TAB>include_prefix');
   foreach ((array)($config['storages'] ?? array()) as $storage)
   {
-    $storageLines[] = (string)($storage['storage_id'] ?? '')."\t".trim((string)($storage['source_prefix'] ?? ''), '/')."\t".(string)($storage['local_mount'] ?? '');
+    $storageLines[] = (string)($storage['storage_id'] ?? '')."\t"
+      .trim((string)($storage['source_prefix'] ?? ''), '/')."\t"
+      .(string)($storage['local_mount'] ?? '')."\t"
+      .trim((string)($storage['include_prefix'] ?? ''), '/');
   }
   if (count($storageLines) === 1) fail_install('Keine Storage-Zuordnungen gespeichert.');
   file_put_contents($storagePath, implode("\n", $storageLines)."\n", LOCK_EX); chmod($storagePath, 0600);

nc-connector-status.php

@@ -36,6 +36,11 @@ $latest = array(
   'api'=>array('state'=>'not_run','message'=>''),
   'fallback'=>array('state'=>'not_run','message'=>''),
   'error_detail'=>'',
+  'route'=>'',
+  'route_label'=>'Noch kein Datenweg erfasst',
+  'route_timestamp'=>0,
+  'route_time_label'=>'Nicht verfügbar',
+  'route_detail'=>'',
 );
 
 if (is_dir($dir))
@@ -57,6 +62,54 @@ if (is_dir($dir))
       $latest['connection_file'] = basename($file);
     }
   }
+
+  $route_file = $dir.'/route-status.json';
+  if (is_readable($route_file))
+  {
+    $route = json_decode((string)@file_get_contents($route_file), true);
+    if (is_array($route))
+    {
+      $route_name = (string)($route['route'] ?? '');
+      $route_timestamp = (int)($route['timestamp'] ?? 0);
+      $route_label = (string)($route['label'] ?? '');
+
+      if ($route_name === 'webdav')
+      {
+        $route_label = 'WEBDAV PRIMÄR';
+      }
+      elseif ($route_name === 'legacy_fallback')
+      {
+        $route_label = 'LEGACY-FALLBACK AKTIV';
+      }
+      elseif ($route_name === 'failed')
+      {
+        $route_label = 'FEHLER - KEIN ERFOLGREICHER DATENWEG';
+      }
+      elseif ($route_label === '')
+      {
+        $route_label = 'UNBEKANNTER DATENWEG';
+      }
+
+      $route_detail = trim((string)($route['detail'] ?? ''));
+      $latest['route'] = $route_name;
+      $latest['route_label'] = $route_label;
+      $latest['route_timestamp'] = $route_timestamp;
+      $latest['route_time_label'] = $route_timestamp > 0 ? date('d.m.Y H:i:s', $route_timestamp) : 'Nicht verfügbar';
+      $latest['route_detail'] = $route_detail;
+
+      $base_message = trim((string)($latest['message'] ?? ''));
+      $message_parts = array($route_label);
+      if ($route_name !== 'webdav' && $route_detail !== '')
+      {
+        $message_parts[] = $route_detail;
+      }
+      if ($base_message !== '')
+      {
+        $message_parts[] = $base_message;
+      }
+      $latest['message'] = implode(' · ', $message_parts);
+    }
+  }
 }
 
 if ((int)$latest['timestamp'] > 0)

noop2

@@ -0,0 +1 @@
+x

noop2-remove-marker.txt

@@ -0,0 +1 @@
+stale branch only

runtime/cleanup-stale.php

@@ -0,0 +1,86 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+$pluginRoot = dirname(__DIR__);
+$piwigoRoot = dirname($pluginRoot, 2);
+$dbConfig = $piwigoRoot.'/local/config/database.inc.php';
+$configDir = '/etc/bratonien-tools/nc-connector';
+$stateRoot = '/var/lib/bratonien-tools/nc-connector';
+
+function cleanup_fail($message)
+{
+  fwrite(STDERR, $message."\n");
+  exit(1);
+}
+
+function cleanup_tree($path)
+{
+  $path = rtrim((string)$path, '/');
+  if ($path === '' || $path === '/' || !file_exists($path)) return;
+  if (is_link($path) || is_file($path))
+  {
+    @unlink($path);
+    return;
+  }
+  $items = @scandir($path);
+  if (!is_array($items)) return;
+  foreach ($items as $item)
+  {
+    if ($item === '.' || $item === '..') continue;
+    cleanup_tree($path.'/'.$item);
+  }
+  @rmdir($path);
+}
+
+if (!is_readable($dbConfig)) cleanup_fail('Piwigo-Datenbankkonfiguration ist nicht lesbar.');
+$conf = array();
+$prefixeTable = 'piwigo_';
+require $dbConfig;
+foreach (array('db_host','db_user','db_password','db_base') as $key)
+{
+  if (!isset($conf[$key])) cleanup_fail('Piwigo-Datenbankkonfiguration ist unvollstaendig: '.$key);
+}
+
+$db = new mysqli($conf['db_host'], $conf['db_user'], $conf['db_password'], $conf['db_base']);
+if ($db->connect_errno) cleanup_fail('Piwigo-Datenbank ist nicht erreichbar: '.$db->connect_error);
+$db->set_charset('utf8mb4');
+
+$table = $prefixeTable.'bratonien_tools_nc_connections';
+$escapedTable = $db->real_escape_string($table);
+$exists = $db->query("SHOW TABLES LIKE '{$escapedTable}'");
+if (!$exists) cleanup_fail('Connector-Tabelle konnte nicht geprüft werden: '.$db->error);
+if ($exists->num_rows === 0) exit(0);
+
+$activeIds = array();
+$result = $db->query("SELECT id FROM `{$table}`");
+if (!$result) cleanup_fail('Connector-Verbindungen konnten nicht gelesen werden: '.$db->error);
+while ($row = $result->fetch_assoc())
+{
+  $activeIds[(int)$row['id']] = true;
+}
+
+if (!is_dir($configDir)) exit(0);
+foreach (glob($configDir.'/connection-*.conf') ?: array() as $configPath)
+{
+  if (!preg_match('/connection-([0-9]+)\.conf$/', $configPath, $matches)) continue;
+  $id = (int)$matches[1];
+  if (isset($activeIds[$id])) continue;
+
+  echo "NC Connector: entferne verwaiste Laufzeitdateien fuer Verbindung {$id}.\n";
+  foreach (array('.conf','.db-password','.piwigo-password','.storages.tsv','.roots.tsv') as $suffix)
+  {
+    @unlink($configDir.'/connection-'.$id.$suffix);
+  }
+  cleanup_tree($stateRoot.'/connection-'.$id);
+
+  $statusDir = rtrim($piwigoRoot, '/').'/_data/bratonien-tools/nc-connector-status';
+  @unlink($statusDir.'/connection-'.$id.'.json');
+  @unlink($statusDir.'/deleted-'.$id);
+}
+
+exit(0);

runtime/cleanup-webdav-piwigo.php

@@ -0,0 +1,169 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+$pluginRoot = dirname(__DIR__);
+$piwigoRoot = dirname($pluginRoot, 2);
+define('PHPWG_ROOT_PATH', rtrim($piwigoRoot, '/').'/');
+
+$_SERVER['REMOTE_ADDR'] = '127.0.0.1';
+$_SERVER['SERVER_ADDR'] = '127.0.0.1';
+$_SERVER['SERVER_NAME'] = 'localhost';
+$_SERVER['HTTP_HOST'] = 'localhost';
+$_SERVER['SERVER_PORT'] = '80';
+$_SERVER['REQUEST_METHOD'] = 'GET';
+$_SERVER['REQUEST_URI'] = '/';
+$_SERVER['SCRIPT_NAME'] = '/plugins/bratonien_tools/runtime/cleanup-webdav-piwigo.php';
+$_SERVER['PHP_SELF'] = $_SERVER['SCRIPT_NAME'];
+$_SERVER['QUERY_STRING'] = '';
+$_SERVER['HTTPS'] = 'off';
+
+require_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+require_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
+
+function bratonien_cleanup_tree($path, $allowed_root)
+{
+  $path = rtrim((string)$path, '/');
+  $allowed_root = rtrim((string)$allowed_root, '/');
+  if ($path === '' || $allowed_root === '' || strpos($path, $allowed_root.'/') !== 0 || !file_exists($path)) return;
+
+  if (is_link($path) || is_file($path))
+  {
+    @unlink($path);
+    return;
+  }
+
+  $items = @scandir($path);
+  if (!is_array($items)) return;
+  foreach ($items as $item)
+  {
+    if ($item === '.' || $item === '..') continue;
+    bratonien_cleanup_tree($path.'/'.$item, $allowed_root);
+  }
+  @rmdir($path);
+}
+
+function bratonien_webdav_site_images($site_id)
+{
+  $rows = array();
+  $query = '
+SELECT DISTINCT i.id, i.path, i.representative_ext
+  FROM '.IMAGES_TABLE.' AS i
+  LEFT JOIN '.CATEGORIES_TABLE.' AS sc ON sc.id = i.storage_category_id
+  LEFT JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON ic.image_id = i.id
+  LEFT JOIN '.CATEGORIES_TABLE.' AS vc ON vc.id = ic.category_id
+  WHERE sc.site_id = '.(int)$site_id.' OR vc.site_id = '.(int)$site_id.'
+;';
+  $result = pwg_query($query);
+  while ($row = pwg_db_fetch_assoc($result))
+  {
+    $row['id'] = (int)$row['id'];
+    $rows[$row['id']] = $row;
+  }
+  return $rows;
+}
+
+try
+{
+  $connection_table = function_exists('bratonien_tools_nc_connector_table')
+    ? bratonien_tools_nc_connector_table()
+    : $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+
+  $active = array();
+  $exists = pwg_query("SHOW TABLES LIKE '".pwg_db_real_escape_string($connection_table)."'");
+  if (pwg_db_num_rows($exists))
+  {
+    $result = pwg_query("SELECT id FROM `".$connection_table."`");
+    while ($row = pwg_db_fetch_assoc($result))
+    {
+      $active[(int)$row['id']] = true;
+    }
+  }
+
+  $site_prefix = './_data/bratonien-tools/nc-webdav-gallery/connection-';
+  $result = pwg_query(
+    "SELECT id, galleries_url FROM ".SITES_TABLE.
+    " WHERE galleries_url LIKE '".pwg_db_real_escape_string($site_prefix)."%'"
+  );
+
+  $removed_sites = 0;
+  $removed_images = 0;
+  while ($site = pwg_db_fetch_assoc($result))
+  {
+    $site_id = (int)$site['id'];
+    $site_url = (string)$site['galleries_url'];
+    if (!preg_match('#^\./_data/bratonien-tools/nc-webdav-gallery/connection-([0-9]+)/$#', $site_url, $match)) continue;
+
+    $connection_id = (int)$match[1];
+    if ($connection_id < 1 || isset($active[$connection_id])) continue;
+
+    $images = bratonien_webdav_site_images($site_id);
+    foreach ($images as $row)
+    {
+      try
+      {
+        delete_element_derivatives($row);
+      }
+      catch (Throwable $e)
+      {
+        fwrite(STDERR, 'WebDAV-Cleanup: Derivate von Bild #'.(int)$row['id'].' konnten nicht vollständig entfernt werden: '.$e->getMessage()."\n");
+      }
+    }
+
+    delete_site($site_id);
+
+    if ($images)
+    {
+      $ids = array_keys($images);
+      $remaining = query2array(
+        'SELECT id FROM '.IMAGES_TABLE.' WHERE id IN ('.implode(',', array_map('intval', $ids)).')',
+        null,
+        'id'
+      );
+      if ($remaining)
+      {
+        delete_elements(array_map('intval', $remaining), false);
+      }
+    }
+
+    $removed_sites++;
+    $removed_images += count($images);
+    echo 'NC WebDAV: entferne verwaiste Piwigo-Site '.$site_id.' für gelöschte Verbindung '.$connection_id.".\n";
+
+    $gallery_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-gallery';
+    $source_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-source';
+    $preview_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-preview';
+    bratonien_cleanup_tree($gallery_root.'/connection-'.$connection_id, $gallery_root);
+    bratonien_cleanup_tree($source_root.'/connection-'.$connection_id, $source_root);
+    bratonien_cleanup_tree($preview_root.'/connection-'.$connection_id, $preview_root);
+
+    $state_root = '/var/lib/bratonien-tools/nc-connector';
+    bratonien_cleanup_tree($state_root.'/connection-'.$connection_id, $state_root);
+
+    foreach (glob('/etc/bratonien-tools/nc-connector/webdav-connection-'.$connection_id.'.*') ?: array() as $file)
+    {
+      @unlink($file);
+    }
+
+    $status_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-connector-status';
+    @unlink($status_root.'/connection-'.$connection_id.'.json');
+    @unlink($status_root.'/deleted-'.$connection_id);
+  }
+
+  if ($removed_sites > 0)
+  {
+    invalidate_user_cache(true);
+  }
+
+  echo 'NC WebDAV Piwigo-Cleanup: sites='.$removed_sites.' bilder='.$removed_images."\n";
+  exit(0);
+}
+catch (Throwable $e)
+{
+  fwrite(STDERR, 'NC WebDAV Piwigo-Cleanup: '.$e->getMessage()."\n");
+  exit(1);
+}

runtime/lib/activity_gate.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Debounce Nextcloud activity and request a periodic safety reconciliation."""
+"""Debounce Nextcloud activity for one connector scope."""
 
 from __future__ import annotations
 
@@ -24,54 +24,117 @@ def validate_view(name: str) -> str:
     return value
 
 
+def sql_literal(value: str) -> str:
+    return "'" + str(value).replace("'", "''") + "'"
+
+
 def load(path: Path) -> dict[str, object]:
-    defaults: dict[str, object] = {"processed":0,"observed":0,"pending_since":0,"last_change":0,"last_full":0,"source_signature":""}
+    defaults: dict[str, object] = {
+        "processed": 0, "observed": 0, "pending_since": 0,
+        "last_change": 0, "last_full": 0, "source_signature": "",
+    }
     if not path.exists():
         return defaults
     data = json.loads(path.read_text(encoding="utf-8"))
-    return {"processed":int(data.get("processed",0)),"observed":int(data.get("observed",0)),"pending_since":int(data.get("pending_since",0)),"last_change":int(data.get("last_change",0)),"last_full":int(data.get("last_full",0)),"source_signature":str(data.get("source_signature",""))}
+    return {
+        "processed": int(data.get("processed", 0)),
+        "observed": int(data.get("observed", 0)),
+        "pending_since": int(data.get("pending_since", 0)),
+        "last_change": int(data.get("last_change", 0)),
+        "last_full": int(data.get("last_full", 0)),
+        "source_signature": str(data.get("source_signature", "")),
+    }
 
 
 def save(path: Path, state: dict[str, object]) -> None:
     path.parent.mkdir(parents=True, exist_ok=True)
     fd, name = tempfile.mkstemp(dir=path.parent)
     with os.fdopen(fd, "w", encoding="utf-8") as handle:
-        json.dump(state,handle,sort_keys=True);handle.write("\n")
+        json.dump(state, handle, sort_keys=True)
+        handle.write("\n")
     Path(name).replace(path)
 
 
 def query(args: argparse.Namespace, sql: str) -> str:
-    env=os.environ.copy();env["PGPASSWORD"]=args.password_file.read_text(encoding="utf-8").strip()
+    env = os.environ.copy()
-    command=["psql","-XAt","-h",args.host,"-p",str(args.port),"-U",args.user,"-d",args.database,"-v","ON_ERROR_STOP=1","-c",sql]
+    env["PGPASSWORD"] = args.password_file.read_text(encoding="utf-8").strip()
+    command = [
+        "psql", "-XAt", "-h", args.host, "-p", str(args.port),
+        "-U", args.user, "-d", args.database, "-v", "ON_ERROR_STOP=1", "-c", sql,
+    ]
     return subprocess.run(command, env=env, check=True, text=True, capture_output=True).stdout
 
 
+def user_where(args: argparse.Namespace) -> str:
+    if not args.access_user:
+        return ""
+    return " WHERE lower(access_user) = lower(" + sql_literal(args.access_user) + ")"
+
+
 def latest(args: argparse.Namespace) -> int:
-    return int(query(args,f"SELECT COALESCE(MAX(activity_id), 0) FROM {validate_view(args.view)}").strip())
+    view = validate_view(args.view)
+    return int(query(args, f"SELECT COALESCE(MAX(activity_id), 0) FROM {view}{user_where(args)}").strip())
 
 
 def source_signature(args: argparse.Namespace) -> str:
-    if not args.source_view:return ""
+    if args.roots_config:
-    payload=query(args,f"SELECT share_id, display_name, storage_id, source_path FROM {validate_view(args.source_view)} ORDER BY share_id")
+        return hashlib.sha256(args.roots_config.read_bytes()).hexdigest()
+    if not args.source_view:
+        return ""
+    view = validate_view(args.source_view)
+    payload = query(args, f"SELECT share_id, display_name, storage_id, source_path FROM {view}{user_where(args)} ORDER BY share_id")
     return hashlib.sha256(payload.encode("utf-8")).hexdigest()
 
 
 def main() -> int:
-    parser=argparse.ArgumentParser();parser.add_argument("action",choices=("check","commit"));parser.add_argument("--state",required=True,type=Path);parser.add_argument("--host",required=True);parser.add_argument("--port",type=int,default=5432);parser.add_argument("--database",required=True);parser.add_argument("--user",required=True);parser.add_argument("--password-file",required=True,type=Path);parser.add_argument("--view",default="piwigo_showcase_activity");parser.add_argument("--source-view",default="");parser.add_argument("--quiet",type=int,default=120);parser.add_argument("--max-wait",type=int,default=900);parser.add_argument("--full-after",type=int,default=86400);args=parser.parse_args()
+    parser = argparse.ArgumentParser()
+    parser.add_argument("action", choices=("check", "commit"))
+    parser.add_argument("--state", required=True, type=Path)
+    parser.add_argument("--host", required=True)
+    parser.add_argument("--port", type=int, default=5432)
+    parser.add_argument("--database", required=True)
+    parser.add_argument("--user", required=True)
+    parser.add_argument("--password-file", required=True, type=Path)
+    parser.add_argument("--view", required=True)
+    parser.add_argument("--source-view", default="")
+    parser.add_argument("--roots-config", type=Path)
+    parser.add_argument("--access-user", default="")
+    parser.add_argument("--quiet", type=int, default=120)
+    parser.add_argument("--max-wait", type=int, default=900)
+    parser.add_argument("--full-after", type=int, default=86400)
+    args = parser.parse_args()
     try:
         validate_view(args.view)
-        if args.source_view:validate_view(args.source_view)
+        if args.source_view:
-        state=load(args.state);now=int(time.time());current=latest(args);current_source=source_signature(args)
+            validate_view(args.source_view)
-        if args.action=="commit":state.update(processed=current,observed=current,pending_since=0,last_change=0,last_full=now,source_signature=current_source);save(args.state,state);return 0
+        state = load(args.state)
-        if not int(state["last_full"]):return 0
+        now = int(time.time())
-        if current_source and current_source!=str(state["source_signature"]):return 0
+        current = latest(args)
-        if current>int(state["observed"]):state["observed"]=current;state["last_change"]=now;state["pending_since"]=int(state["pending_since"]) or now;save(args.state,state)
+        current_source = source_signature(args)
-        if now-int(state["last_full"])>=args.full_after:return 0
+        if args.action == "commit":
-        if int(state["observed"])<=int(state["processed"]):return 3
+            state.update(processed=current, observed=current, pending_since=0, last_change=0, last_full=now, source_signature=current_source)
-        if now-int(state["last_change"])>=args.quiet or now-int(state["pending_since"])>=args.max_wait:return 0
+            save(args.state, state)
+            return 0
+        if not int(state["last_full"]):
+            return 0
+        if current_source and current_source != str(state["source_signature"]):
+            return 0
+        if current > int(state["observed"]):
+            state["observed"] = current
+            state["last_change"] = now
+            state["pending_since"] = int(state["pending_since"]) or now
+            save(args.state, state)
+        if now - int(state["last_full"]) >= args.full_after:
+            return 0
+        if int(state["observed"]) <= int(state["processed"]):
+            return 3
+        if now - int(state["last_change"]) >= args.quiet or now - int(state["pending_since"]) >= args.max_wait:
+            return 0
         return 3
     except Exception as error:
-        print(f"activity-gate: {error}",file=sys.stderr);return 1
+        print(f"activity-gate: {error}", file=sys.stderr)
+        return 1
 
 
-if __name__=="__main__":raise SystemExit(main())
+if __name__ == "__main__":
+    raise SystemExit(main())

runtime/lib/build-webdav-derivatives.php

@@ -0,0 +1,174 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+const BRATONIEN_WEBDAV_DERIVATIVE_BUILDER_VERSION = '0.9.6.1';
+
+$options = getopt('', array('piwigo-root:', 'connection-id:'));
+$piwigo_root = rtrim((string)($options['piwigo-root'] ?? ''), '/');
+$connection_id = (int)($options['connection-id'] ?? 0);
+if ($piwigo_root === '' || $connection_id < 1)
+{
+  fwrite(STDERR, "Parameter --piwigo-root und --connection-id werden benoetigt.\n");
+  exit(1);
+}
+if (!is_dir($piwigo_root))
+{
+  fwrite(STDERR, "Piwigo-Root wurde nicht gefunden.\n");
+  exit(1);
+}
+
+define('PHPWG_ROOT_PATH', $piwigo_root.'/');
+$_SERVER['REMOTE_ADDR'] = '127.0.0.1';
+$_SERVER['SERVER_ADDR'] = '127.0.0.1';
+$_SERVER['SERVER_NAME'] = 'localhost';
+$_SERVER['HTTP_HOST'] = 'localhost';
+$_SERVER['SERVER_PORT'] = '80';
+$_SERVER['REQUEST_METHOD'] = 'GET';
+$_SERVER['REQUEST_URI'] = '/';
+$_SERVER['SCRIPT_NAME'] = '/plugins/bratonien_tools/runtime/lib/build-webdav-derivatives.php';
+$_SERVER['PHP_SELF'] = $_SERVER['SCRIPT_NAME'];
+$_SERVER['QUERY_STRING'] = '';
+$_SERVER['HTTP_USER_AGENT'] = 'Bratonien-WebDAV-Derivative-Builder/'.BRATONIEN_WEBDAV_DERIVATIVE_BUILDER_VERSION;
+$_SERVER['HTTPS'] = 'off';
+
+require_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+require_once(PHPWG_ROOT_PATH.'include/derivative.inc.php');
+require_once(PHPWG_ROOT_PATH.'admin/include/image.class.php');
+
+if (!function_exists('bratonien_tools_webdav_image_source_info') || !function_exists('bratonien_tools_webdav_generate_derivative'))
+{
+  fwrite(STDERR, "Bratonien WebDAV-Bildruntime ist nicht aktiv.\n");
+  exit(1);
+}
+
+try
+{
+  $variants = bratonien_tools_webdav_derivative_variants();
+  if (!$variants)
+  {
+    throw new RuntimeException('Keine Piwigo-Derivate konfiguriert.');
+  }
+
+  $images = 0;
+  $generated_or_ready = 0;
+  $identity = 0;
+  $metadata_repaired = 0;
+  $errors = 0;
+  $error_lines = array();
+
+  $result = pwg_query('SELECT * FROM '.IMAGES_TABLE.' ORDER BY id');
+  while ($row = pwg_db_fetch_assoc($result))
+  {
+    $image_id = (int)$row['id'];
+    $info = bratonien_tools_webdav_image_source_info($image_id);
+    if (!$info || (int)$info['connection_id'] !== $connection_id) continue;
+
+    $images++;
+    $preview = bratonien_tools_webdav_preview_path($info);
+    if (!$preview)
+    {
+      $errors++;
+      $error_lines[] = 'Bild #'.$image_id.': vorbereitetes WebDAV-Preview fehlt.';
+      continue;
+    }
+
+    $preview_ext = strtolower(pathinfo($preview, PATHINFO_EXTENSION));
+    if (!in_array($preview_ext, array('jpg', 'jpeg', 'png', 'gif'), true))
+    {
+      $errors++;
+      $error_lines[] = 'Bild #'.$image_id.': Preview-Format '.$preview_ext.' ist nicht Piwigo-kompatibel; Precache muss neu erzeugt werden.';
+      continue;
+    }
+
+    $size = @getimagesize($preview);
+    if (!is_array($size) || empty($size[0]) || empty($size[1]))
+    {
+      $errors++;
+      $error_lines[] = 'Bild #'.$image_id.': Preview ist kein lesbares Bild: '.$preview;
+      continue;
+    }
+
+    $preview_width = (int)$size[0];
+    $preview_height = (int)$size[1];
+    if ((int)($row['width'] ?? 0) !== $preview_width || (int)($row['height'] ?? 0) !== $preview_height || (int)($row['rotation'] ?? 0) !== 0)
+    {
+      pwg_query(
+        'UPDATE '.IMAGES_TABLE.
+        ' SET width='.$preview_width.', height='.$preview_height.', rotation=0'.
+        ' WHERE id='.$image_id
+      );
+      $row['width'] = $preview_width;
+      $row['height'] = $preview_height;
+      $row['rotation'] = 0;
+      $metadata_repaired++;
+    }
+
+    $src = new SrcImage($row);
+    foreach ($variants as $variant_name => $params)
+    {
+      try
+      {
+        $probe = new DerivativeImage($params, $src);
+        if ($probe->same_as_source())
+        {
+          $identity++;
+          continue;
+        }
+
+        $detail = '';
+        if (bratonien_tools_webdav_generate_derivative($params, $src, $detail))
+        {
+          $generated_or_ready++;
+        }
+        else
+        {
+          $errors++;
+          $error_lines[] = 'Bild #'.$image_id.' '.$variant_name.': '.($detail !== '' ? $detail : 'Derivat konnte nicht erzeugt werden.');
+        }
+      }
+      catch (Throwable $e)
+      {
+        $errors++;
+        $error_lines[] = 'Bild #'.$image_id.' '.$variant_name.': '.get_class($e).': '.$e->getMessage();
+      }
+    }
+  }
+
+  if ($metadata_repaired > 0)
+  {
+    update_category('all');
+    invalidate_user_cache(true);
+  }
+
+  if ($errors > 0)
+  {
+    foreach (array_slice($error_lines, 0, 30) as $line)
+    {
+      fwrite(STDERR, $line."\n");
+    }
+    if (count($error_lines) > 30)
+    {
+      fwrite(STDERR, 'Weitere Fehler: '.(count($error_lines) - 30)."\n");
+    }
+  }
+
+  echo 'WebDAV-Derivative-Builder: version='.BRATONIEN_WEBDAV_DERIVATIVE_BUILDER_VERSION.
+    ' bilder='.$images.
+    ' varianten='.count($variants).
+    ' bereit='.$generated_or_ready.
+    ' identisch='.$identity.
+    ' metadaten_repariert='.$metadata_repaired.
+    ' fehler='.$errors."\n";
+
+  exit($errors > 0 ? 1 : 0);
+}
+catch (Throwable $e)
+{
+  fwrite(STDERR, 'WebDAV-Derivate: '.get_class($e).': '.$e->getMessage()."\n");
+  exit(1);
+}

runtime/lib/build_manifest.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Resolve Nextcloud view rows through explicitly configured storage mounts."""
+"""Resolve Nextcloud share rows through configured storage adapters."""
 
 from __future__ import annotations
 
@@ -23,93 +23,194 @@ def validate_view(name: str) -> str:
     return value
 
 
-def read_config(path: Path) -> dict[str, tuple[str, Path]]:
+def sql_literal(value: str) -> str:
-    result: dict[str, tuple[str, Path]] = {}
+    return "'" + str(value).replace("'", "''") + "'"
+
+
+def read_config(path: Path) -> dict[str, list[tuple[str, Path, str]]]:
+    result: dict[str, list[tuple[str, Path, str]]] = {}
     with path.open(encoding="utf-8") as handle:
         for number, line in enumerate(handle, 1):
             line = line.rstrip("\n")
-            if not line or line.startswith("#"):continue
+            if not line or line.startswith("#"):
+                continue
             fields = line.split("\t")
-            if len(fields)!=3:raise ValueError(f"{path}:{number}: expected storage_id, source_prefix and local_mount")
+            if len(fields) not in {3, 4}:
-            storage_id,prefix,mount=fields
+                raise ValueError(f"{path}:{number}: expected storage_id, source_prefix, local_mount and optional include_prefix")
-            if not storage_id.strip():raise ValueError(f"{path}:{number}: storage_id is empty")
+            storage_id, prefix, mount = fields[:3]
-            result[storage_id]=(prefix.strip("/"),Path(mount))
+            include_prefix = fields[3] if len(fields) == 4 else ""
+            storage_id = storage_id.strip()
+            prefix = prefix.strip("/")
+            include_prefix = include_prefix.strip("/")
+            if not storage_id:
+                raise ValueError(f"{path}:{number}: storage_id is empty")
+            if ".." in PurePosixPath(prefix).parts or ".." in PurePosixPath(include_prefix).parts:
+                raise ValueError(f"{path}:{number}: unsafe prefix")
+            result.setdefault(storage_id, []).append((prefix, Path(mount), include_prefix))
     return result
 
 
 def run_query(args: argparse.Namespace, env: dict[str, str], sql: str) -> subprocess.CompletedProcess[str]:
-    command=["psql","-X","-A","-F","\t","-t","-v","ON_ERROR_STOP=1","-h",args.host,"-p",str(args.port),"-U",args.user,"-d",args.database,"-c",sql]
+    command = [
+        "psql", "-X", "-A", "-F", "\t", "-t", "-v", "ON_ERROR_STOP=1",
+        "-h", args.host, "-p", str(args.port), "-U", args.user, "-d", args.database, "-c", sql,
+    ]
     return subprocess.run(command, env=env, check=False, text=True, capture_output=True)
 
 
 def query_rows(args: argparse.Namespace) -> list[list[str]]:
-    password=args.password_file.read_text(encoding="utf-8").strip();env=os.environ.copy();env["PGPASSWORD"]=password;view=validate_view(args.view)
+    password = args.password_file.read_text(encoding="utf-8").strip()
-    modern_sql=f"SELECT share_id, item_type, display_name, storage_id, source_path FROM {view} ORDER BY share_id"
+    env = os.environ.copy()
+    env["PGPASSWORD"] = password
+    view = validate_view(args.view)
+    where = ""
+    if args.access_user:
+        where = " WHERE lower(access_user) = lower(" + sql_literal(args.access_user) + ")"
+    modern_sql = f"SELECT share_id, item_type, display_name, storage_id, source_path FROM {view}{where} ORDER BY share_id"
     completed = run_query(args, env, modern_sql)
-    if completed.returncode==0:return list(csv.reader(completed.stdout.splitlines(),delimiter="\t"))
+    if completed.returncode == 0:
-    if "item_type" not in completed.stderr or "does not exist" not in completed.stderr:raise RuntimeError(completed.stderr.strip() or "Nextcloud source view query failed")
+        return list(csv.reader(completed.stdout.splitlines(), delimiter="\t"))
+    if args.access_user:
+        raise RuntimeError(completed.stderr.strip() or "Nextcloud user-filtered source query failed")
+    if "item_type" not in completed.stderr or "does not exist" not in completed.stderr:
+        raise RuntimeError(completed.stderr.strip() or "Nextcloud source view query failed")
     legacy_sql = f"SELECT share_id, display_name, storage_id, source_path FROM {view} ORDER BY share_id"
     completed = run_query(args, env, legacy_sql)
-    if completed.returncode!=0:raise RuntimeError(completed.stderr.strip() or "legacy Nextcloud source view query failed")
+    if completed.returncode != 0:
-    rows=[]
+        raise RuntimeError(completed.stderr.strip() or "legacy Nextcloud source view query failed")
+    rows: list[list[str]] = []
     for row in csv.reader(completed.stdout.splitlines(), delimiter="\t"):
         if len(row) == 4:
-            share_id,display_name,storage_id,source_path=row;rows.append([share_id,"",display_name,storage_id,source_path])
+            share_id, display_name, storage_id, source_path = row
-        else:rows.append(row)
+            rows.append([share_id, "", display_name, storage_id, source_path])
+        else:
+            rows.append(row)
     return rows
 
 
 def contained_join(root: Path, relative: str) -> Path:
     parts = PurePosixPath(relative).parts
-    if relative.startswith("/") or ".." in parts:raise ValueError(f"unsafe source path: {relative}")
+    if relative.startswith("/") or ".." in parts:
+        raise ValueError(f"unsafe source path: {relative}")
     return root.joinpath(*parts)
 
 
+def matches_prefix(path: str, prefix: str) -> bool:
+    return not prefix or path == prefix or path.startswith(prefix + "/")
+
+
+def resolve_adapter(adapters: dict[str, list[tuple[str, Path, str]]], storage_id: str, source_path: str) -> tuple[str, Path, str] | None:
+    relative = source_path.strip("/")
+    matches: list[tuple[str, Path, str]] = []
+    for prefix, mount, include_prefix in adapters.get(storage_id, []):
+        if not matches_prefix(relative, prefix):
+            continue
+        mapped_relative = relative[len(prefix):].lstrip("/") if prefix else relative
+        if not matches_prefix(mapped_relative, include_prefix):
+            continue
+        matches.append((prefix, mount, include_prefix))
+    if not matches:
+        return None
+    matches.sort(key=lambda item: (len(item[0]), len(item[2])), reverse=True)
+    best_score = (len(matches[0][0]), len(matches[0][2]))
+    best = {(item[0], str(item[1]), item[2]): item for item in matches if (len(item[0]), len(item[2])) == best_score}
+    if len(best) != 1:
+        raise RuntimeError(f"storage adapter is ambiguous for {storage_id}")
+    return next(iter(best.values()))
+
+
 def build(args: argparse.Namespace) -> dict[str, object]:
-    validate_view(args.view);adapters=read_config(args.storage_config);rows=query_rows(args)
+    validate_view(args.view)
-    if not rows and not args.allow_empty:raise RuntimeError("Nextcloud returned no Showcase shares; refusing an empty manifest")
+    adapters = read_config(args.storage_config)
-    manifest=[];errors=[];folder_count=0;file_count=0
+    rows = query_rows(args)
+    if not rows and not args.allow_empty:
+        raise RuntimeError("Nextcloud returned no matching sources; refusing an empty manifest")
+    manifest: list[str] = []
+    errors: list[str] = []
+    folder_count = 0
+    file_count = 0
     for row in rows:
-        if len(row)!=5:errors.append(f"invalid database row with {len(row)} columns");continue
+        if len(row) != 5:
-        share_id,item_type,display_name,storage_id,source_path=row;item_type=item_type.strip().lower()
+            errors.append(f"invalid database row with {len(row)} columns")
-        if item_type and item_type not in {"folder","file"}:errors.append(f"share {share_id}: unsupported item_type {item_type!r}");continue
+            continue
-        adapter=adapters.get(storage_id)
+        share_id, item_type, display_name, storage_id, source_path = row
-        if not adapter:errors.append(f"share {share_id}: unknown storage {storage_id}");continue
+        item_type = item_type.strip().lower()
-        prefix,mount=adapter;relative=source_path.strip("/")
+        relative = source_path.strip("/")
+        if item_type and item_type not in {"folder", "file"}:
+            errors.append(f"source {share_id}: unsupported item_type {item_type!r}")
+            continue
+        try:
+            adapter = resolve_adapter(adapters, storage_id, relative)
+        except RuntimeError as error:
+            errors.append(f"source {share_id}: {error}")
+            continue
+        if not adapter:
+            continue
+        prefix, mount, _include_prefix = adapter
         if prefix:
-            expected=prefix+"/"
-            if relative!=prefix and not relative.startswith(expected):errors.append(f"share {share_id}: path does not match configured prefix");continue
             relative = relative[len(prefix):].lstrip("/")
         source = contained_join(mount, relative)
-        if not mount.is_mount():errors.append(f"share {share_id}: storage mount unavailable: {mount}");continue
+        if not mount.is_mount():
+            errors.append(f"source {share_id}: storage mount unavailable: {mount}")
+            continue
         if not item_type:
-            if source.is_dir():item_type="folder"
+            if source.is_dir():
-            elif source.is_file():item_type="file"
+                item_type = "folder"
-            else:errors.append(f"share {share_id}: source unavailable: {source}");continue
+            elif source.is_file():
+                item_type = "file"
+            else:
+                errors.append(f"source {share_id}: source unavailable: {source}")
+                continue
         if item_type == "folder":
-            if not source.is_dir():errors.append(f"share {share_id}: source directory unavailable: {source}");continue
+            if not source.is_dir():
+                errors.append(f"source {share_id}: source directory unavailable: {source}")
+                continue
             folder_count += 1
         else:
-            if not source.is_file():errors.append(f"share {share_id}: source file unavailable: {source}");continue
+            if not source.is_file():
+                errors.append(f"source {share_id}: source file unavailable: {source}")
+                continue
             file_count += 1
-        if "\t" in display_name or "\n" in display_name or "\r" in display_name:errors.append(f"share {share_id}: display name contains unsupported control characters");continue
+        if any(char in display_name for char in ("\t", "\n", "\r")):
+            errors.append(f"source {share_id}: display name contains unsupported control characters")
+            continue
         source_text = str(source)
-        if "\t" in source_text or "\n" in source_text or "\r" in source_text:errors.append(f"share {share_id}: source path contains unsupported control characters");continue
+        if any(char in source_text for char in ("\t", "\n", "\r")):
+            errors.append(f"source {share_id}: source path contains unsupported control characters")
+            continue
         manifest.append(f"{share_id}\t{item_type}\t{display_name.lstrip('/')}\t{source}")
-    if errors:raise RuntimeError("; ".join(errors))
+    if errors:
-    if len(manifest)!=len(rows):raise RuntimeError("not all Showcase shares could be resolved")
+        raise RuntimeError("; ".join(errors))
+    if not manifest and rows and not args.allow_empty:
+        raise RuntimeError("no Nextcloud sources match the configured storage adapters")
     args.output.parent.mkdir(parents=True, exist_ok=True)
     with tempfile.NamedTemporaryFile("w", encoding="utf-8", dir=args.output.parent, delete=False) as handle:
-        handle.write("\n".join(manifest)+("\n" if manifest else ""));temporary=Path(handle.name)
+        handle.write("\n".join(manifest) + ("\n" if manifest else ""))
+        temporary = Path(handle.name)
     temporary.replace(args.output)
-    return {"shares":len(manifest),"folders":folder_count,"files":file_count,"manifest":str(args.output)}
+    return {"sources": len(manifest), "folders": folder_count, "files": file_count, "manifest": str(args.output)}
 
 
 def main() -> int:
-    parser=argparse.ArgumentParser();parser.add_argument("--host",required=True);parser.add_argument("--port",type=int,default=5432);parser.add_argument("--database",required=True);parser.add_argument("--user",required=True);parser.add_argument("--password-file",required=True,type=Path);parser.add_argument("--view",default="piwigo_showcase_sources");parser.add_argument("--storage-config",required=True,type=Path);parser.add_argument("--output",required=True,type=Path);parser.add_argument("--allow-empty",action="store_true");args=parser.parse_args()
+    parser = argparse.ArgumentParser()
-    try:print(json.dumps(build(args),ensure_ascii=False))
+    parser.add_argument("--host", required=True)
-    except Exception as error:print(f"manifest: {error}",file=sys.stderr);return 1
+    parser.add_argument("--port", type=int, default=5432)
+    parser.add_argument("--database", required=True)
+    parser.add_argument("--user", required=True)
+    parser.add_argument("--password-file", required=True, type=Path)
+    parser.add_argument("--view", required=True)
+    parser.add_argument("--access-user", default="")
+    parser.add_argument("--storage-config", required=True, type=Path)
+    parser.add_argument("--output", required=True, type=Path)
+    parser.add_argument("--allow-empty", action="store_true")
+    args = parser.parse_args()
+    try:
+        print(json.dumps(build(args), ensure_ascii=False))
+    except Exception as error:
+        print(f"manifest: {error}", file=sys.stderr)
+        return 1
     return 0
 
 
-if __name__=="__main__":raise SystemExit(main())
+if __name__ == "__main__":
+    raise SystemExit(main())

runtime/lib/build_selected_manifest.py

@@ -0,0 +1,191 @@
+#!/usr/bin/env python3
+"""Build a manifest from WebDAV-authorized Nextcloud file IDs.
+
+The selected roots are resolved through a generic Nextcloud file view and then
+mapped through configured storage adapters. No user name, path layout or storage
+protocol is assumed here.
+"""
+
+from __future__ import annotations
+
+import argparse
+import csv
+import json
+import os
+import re
+import subprocess
+import sys
+import tempfile
+from pathlib import Path, PurePosixPath
+
+IDENTIFIER = re.compile(r"^[A-Za-z_][A-Za-z0-9_]*(?:\.[A-Za-z_][A-Za-z0-9_]*)?$")
+
+
+def validate_view(name: str) -> str:
+    value = str(name).strip()
+    if not IDENTIFIER.fullmatch(value):
+        raise ValueError(f"invalid SQL view name: {value!r}")
+    return value
+
+
+def safe_relative(value: str) -> str:
+    value = str(value).strip("/")
+    if ".." in PurePosixPath(value).parts:
+        raise ValueError(f"unsafe relative path: {value!r}")
+    return value
+
+
+def read_roots(path: Path) -> dict[int, str]:
+    roots: dict[int, str] = {}
+    with path.open(encoding="utf-8") as handle:
+        for number, raw in enumerate(handle, 1):
+            line = raw.rstrip("\n")
+            if not line or line.startswith("#"):
+                continue
+            fields = line.split("\t")
+            if len(fields) != 2:
+                raise ValueError(f"{path}:{number}: expected fileid and display_name")
+            fileid_text, display_name = fields
+            if not fileid_text.isdigit() or int(fileid_text) < 1:
+                raise ValueError(f"{path}:{number}: invalid fileid")
+            if any(char in display_name for char in ("\t", "\n", "\r")):
+                raise ValueError(f"{path}:{number}: invalid display name")
+            roots[int(fileid_text)] = display_name or f"Element_{fileid_text}"
+    if not roots:
+        raise ValueError("no selected Nextcloud roots configured")
+    return roots
+
+
+def read_adapters(path: Path) -> dict[str, list[tuple[str, Path]]]:
+    result: dict[str, list[tuple[str, Path]]] = {}
+    with path.open(encoding="utf-8") as handle:
+        for number, raw in enumerate(handle, 1):
+            line = raw.rstrip("\n")
+            if not line or line.startswith("#"):
+                continue
+            fields = line.split("\t")
+            if len(fields) not in {3, 4}:
+                raise ValueError(f"{path}:{number}: expected storage_id, source_prefix, local_mount and optional include_prefix")
+            storage_id, source_prefix, local_mount = fields[:3]
+            storage_id = storage_id.strip()
+            source_prefix = safe_relative(source_prefix)
+            mount = Path(local_mount)
+            if not storage_id:
+                raise ValueError(f"{path}:{number}: empty storage_id")
+            if not mount.is_absolute():
+                raise ValueError(f"{path}:{number}: local_mount must be absolute")
+            result.setdefault(storage_id, []).append((source_prefix, mount))
+    if not result:
+        raise ValueError("no storage adapters configured")
+    return result
+
+
+def matches_prefix(path: str, prefix: str) -> bool:
+    return not prefix or path == prefix or path.startswith(prefix + "/")
+
+
+def resolve_adapter(adapters: dict[str, list[tuple[str, Path]]], storage_id: str, source_path: str) -> tuple[str, Path]:
+    relative = safe_relative(source_path)
+    matches = [(prefix, mount) for prefix, mount in adapters.get(storage_id, []) if matches_prefix(relative, prefix)]
+    if not matches:
+        raise RuntimeError(f"no storage adapter configured for {storage_id}")
+    matches.sort(key=lambda item: len(item[0]), reverse=True)
+    best_length = len(matches[0][0])
+    best = {(prefix, str(mount)): (prefix, mount) for prefix, mount in matches if len(prefix) == best_length}
+    if len(best) != 1:
+        raise RuntimeError(f"storage adapter is ambiguous for {storage_id}")
+    return next(iter(best.values()))
+
+
+def query_rows(args: argparse.Namespace, roots: dict[int, str]) -> dict[int, tuple[str, str]]:
+    password = args.password_file.read_text(encoding="utf-8").strip()
+    env = os.environ.copy()
+    env["PGPASSWORD"] = password
+    ids = ",".join(str(fileid) for fileid in sorted(roots))
+    view = validate_view(args.view)
+    sql = f"SELECT fileid, storage_id, source_path FROM {view} WHERE fileid IN ({ids}) ORDER BY fileid"
+    command = [
+        "psql", "-X", "-A", "-F", "\t", "-t", "-v", "ON_ERROR_STOP=1",
+        "-h", args.host, "-p", str(args.port), "-U", args.user, "-d", args.database, "-c", sql,
+    ]
+    completed = subprocess.run(command, env=env, check=False, text=True, capture_output=True)
+    if completed.returncode != 0:
+        raise RuntimeError(completed.stderr.strip() or "Nextcloud file view query failed")
+    result: dict[int, tuple[str, str]] = {}
+    for row in csv.reader(completed.stdout.splitlines(), delimiter="\t"):
+        if len(row) != 3 or not row[0].isdigit():
+            raise RuntimeError("invalid row returned by Nextcloud file view")
+        result[int(row[0])] = (row[1], row[2])
+    missing = sorted(set(roots) - set(result))
+    if missing:
+        raise RuntimeError("selected Nextcloud file IDs are no longer resolvable: " + ", ".join(map(str, missing)))
+    return result
+
+
+def contained_join(root: Path, relative: str) -> Path:
+    relative = safe_relative(relative)
+    candidate = root.joinpath(*PurePosixPath(relative).parts) if relative else root
+    root_real = root.resolve()
+    candidate_real = candidate.resolve()
+    try:
+        candidate_real.relative_to(root_real)
+    except ValueError as error:
+        raise ValueError(f"resolved source escapes configured mount: {candidate}") from error
+    return candidate
+
+
+def build(args: argparse.Namespace) -> dict[str, object]:
+    roots = read_roots(args.roots_config)
+    adapters = read_adapters(args.storage_config)
+    rows = query_rows(args, roots)
+    manifest: list[str] = []
+
+    for fileid, display_name in roots.items():
+        storage_id, source_path = rows[fileid]
+        prefix, mount = resolve_adapter(adapters, storage_id, source_path)
+        if not mount.is_mount():
+            raise RuntimeError(f"storage mount unavailable: {mount}")
+        relative = safe_relative(source_path)
+        if prefix:
+            relative = relative[len(prefix):].lstrip("/")
+        source = contained_join(mount, relative)
+        if source.is_dir():
+            item_type = "folder"
+        elif source.is_file():
+            item_type = "file"
+        else:
+            raise RuntimeError(f"selected source unavailable: {source}")
+        if any(char in str(source) for char in ("\t", "\n", "\r")):
+            raise ValueError("resolved source path contains unsupported control characters")
+        manifest.append(f"fileid:{fileid}\t{item_type}\t{display_name}\t{source}")
+
+    args.output.parent.mkdir(parents=True, exist_ok=True)
+    with tempfile.NamedTemporaryFile("w", encoding="utf-8", dir=args.output.parent, delete=False) as handle:
+        handle.write("\n".join(manifest) + "\n")
+        temporary = Path(handle.name)
+    temporary.replace(args.output)
+    return {"roots": len(manifest), "manifest": str(args.output)}
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--host", required=True)
+    parser.add_argument("--port", type=int, default=5432)
+    parser.add_argument("--database", required=True)
+    parser.add_argument("--user", required=True)
+    parser.add_argument("--password-file", required=True, type=Path)
+    parser.add_argument("--view", required=True)
+    parser.add_argument("--storage-config", required=True, type=Path)
+    parser.add_argument("--roots-config", required=True, type=Path)
+    parser.add_argument("--output", required=True, type=Path)
+    args = parser.parse_args()
+    try:
+        print(json.dumps(build(args), ensure_ascii=False))
+    except Exception as error:
+        print(f"selected-manifest: {error}", file=sys.stderr)
+        return 1
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

runtime/lib/build_webdav_placeholder_source.py

@@ -0,0 +1,319 @@
+#!/usr/bin/env python3
+"""Build a placeholder-backed local source tree from Nextcloud WebDAV.
+
+This is intentionally additive: it does not replace the existing local-storage
+connector path. It creates only tiny placeholder files plus a metadata mapping;
+no Nextcloud original media is downloaded.
+"""
+
+from __future__ import annotations
+
+import argparse
+import base64
+import getpass
+import json
+import os
+import shutil
+import ssl
+import sys
+import tempfile
+import urllib.error
+import urllib.parse
+import urllib.request
+import xml.etree.ElementTree as ET
+from pathlib import Path, PurePosixPath
+
+DAV = "DAV:"
+OC = "http://owncloud.org/ns"
+SUPPORTED_IMAGE_EXTENSIONS = {".jpg", ".jpeg", ".png", ".gif", ".webp"}
+# 1x1 transparent GIF, 34 bytes. The filename keeps the remote extension;
+# the placeholder exists only so Piwigo can discover the logical image entry.
+PLACEHOLDER = base64.b64decode("R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw==")
+
+
+def fail(message: str) -> None:
+    raise RuntimeError(message)
+
+
+def validate_relative(value: str) -> str:
+    value = str(value).strip("/")
+    parts = PurePosixPath(value).parts
+    if ".." in parts:
+        raise ValueError(f"unsafe WebDAV path: {value!r}")
+    return value
+
+
+def quote_path(value: str) -> str:
+    value = validate_relative(value)
+    return "/".join(urllib.parse.quote(part, safe="") for part in PurePosixPath(value).parts)
+
+
+def safe_local_name(name: str) -> str:
+    if not name or name in {".", ".."} or "/" in name or "\x00" in name:
+        raise ValueError(f"unsafe remote name: {name!r}")
+    return name
+
+
+class WebDavClient:
+    def __init__(self, base_url: str, user: str, password: str, timeout: int = 30) -> None:
+        self.base_url = base_url.rstrip("/")
+        self.user = user
+        self.password = password
+        self.timeout = timeout
+        token = base64.b64encode(f"{user}:{password}".encode("utf-8")).decode("ascii")
+        self.auth_header = f"Basic {token}"
+        self.context = ssl.create_default_context()
+
+    def collection_url(self, relative: str) -> str:
+        user = urllib.parse.quote(self.user, safe="")
+        suffix = quote_path(relative)
+        url = f"{self.base_url}/remote.php/dav/files/{user}/"
+        if suffix:
+            url += suffix + "/"
+        return url
+
+    def list_collection(self, relative: str) -> tuple[dict[str, object], list[dict[str, object]]]:
+        relative = validate_relative(relative)
+        url = self.collection_url(relative)
+        body = (
+            '<?xml version="1.0"?>'
+            '<d:propfind xmlns:d="DAV:" xmlns:oc="http://owncloud.org/ns">'
+            '<d:prop><d:displayname/><d:resourcetype/><d:getcontenttype/>'
+            '<d:getcontentlength/><d:getetag/><oc:fileid/></d:prop></d:propfind>'
+        ).encode("utf-8")
+        request = urllib.request.Request(url, data=body, method="PROPFIND")
+        request.add_header("Authorization", self.auth_header)
+        request.add_header("Depth", "1")
+        request.add_header("Content-Type", "application/xml; charset=utf-8")
+        try:
+            with urllib.request.urlopen(request, timeout=self.timeout, context=self.context) as response:
+                status = response.status
+                payload = response.read()
+        except urllib.error.HTTPError as error:
+            if error.code in {401, 403}:
+                fail("Nextcloud rejected the WebDAV credentials or directory access")
+            fail(f"Nextcloud PROPFIND failed with HTTP {error.code}")
+        except urllib.error.URLError as error:
+            fail(f"Nextcloud WebDAV is unreachable: {error.reason}")
+        if status != 207:
+            fail(f"Nextcloud PROPFIND returned HTTP {status}")
+
+        try:
+            root = ET.fromstring(payload)
+        except ET.ParseError as error:
+            raise RuntimeError("Nextcloud returned invalid WebDAV XML") from error
+
+        base_path = urllib.parse.unquote(urllib.parse.urlparse(url).path).rstrip("/")
+        current: dict[str, object] | None = None
+        children: list[dict[str, object]] = []
+        for response in root.findall(f"{{{DAV}}}response"):
+            href = response.findtext(f"{{{DAV}}}href", default="")
+            href_path = urllib.parse.unquote(urllib.parse.urlparse(href).path).rstrip("/")
+            prop = None
+            for propstat in response.findall(f"{{{DAV}}}propstat"):
+                status_text = propstat.findtext(f"{{{DAV}}}status", default="")
+                if " 200 " in status_text:
+                    prop = propstat.find(f"{{{DAV}}}prop")
+                    if prop is not None:
+                        break
+            if prop is None:
+                continue
+            display = prop.findtext(f"{{{DAV}}}displayname", default="")
+            fileid_text = prop.findtext(f"{{{OC}}}fileid", default="").strip()
+            resource_type = prop.find(f"{{{DAV}}}resourcetype")
+            is_dir = resource_type is not None and resource_type.find(f"{{{DAV}}}collection") is not None
+            item = {
+                "display_name": display,
+                "fileid": int(fileid_text) if fileid_text.isdigit() else 0,
+                "is_dir": is_dir,
+                "content_type": prop.findtext(f"{{{DAV}}}getcontenttype", default=""),
+                "size": int(prop.findtext(f"{{{DAV}}}getcontentlength", default="0") or 0),
+                "etag": prop.findtext(f"{{{DAV}}}getetag", default="").strip('"'),
+            }
+            if href_path == base_path:
+                current = item
+                continue
+            if display:
+                children.append(item)
+        if current is None or int(current.get("fileid", 0)) < 1:
+            fail(f"Nextcloud returned no stable fileid for {relative or '/'}")
+        return current, children
+
+
+def link_placeholder(seed: Path, target: Path) -> None:
+    target.parent.mkdir(parents=True, exist_ok=True)
+    try:
+        os.link(seed, target)
+    except OSError:
+        target.write_bytes(PLACEHOLDER)
+
+
+def build_root(
+    client: WebDavClient,
+    remote_root: str,
+    local_root: Path,
+    seed: Path,
+    mapping: dict[str, dict[str, object]],
+) -> tuple[int, int, int]:
+    files = 0
+    folders = 0
+    skipped = 0
+    stack: list[tuple[str, Path]] = [(validate_relative(remote_root), local_root)]
+    visited: set[str] = set()
+
+    while stack:
+        remote_dir, local_dir = stack.pop()
+        if remote_dir in visited:
+            continue
+        visited.add(remote_dir)
+        current, children = client.list_collection(remote_dir)
+        local_dir.mkdir(parents=True, exist_ok=True)
+        folders += 1
+        mapping[str(local_dir)] = {
+            "kind": "folder",
+            "fileid": int(current["fileid"]),
+            "webdav_path": remote_dir,
+            "display_name": str(current.get("display_name", "")),
+        }
+
+        for child in children:
+            name = safe_local_name(str(child["display_name"]))
+            child_remote = name if remote_dir == "" else f"{remote_dir}/{name}"
+            child_local = local_dir / name
+            if bool(child["is_dir"]):
+                stack.append((child_remote, child_local))
+                continue
+            extension = Path(name).suffix.lower()
+            if extension not in SUPPORTED_IMAGE_EXTENSIONS:
+                skipped += 1
+                continue
+            link_placeholder(seed, child_local)
+            files += 1
+            mapping[str(child_local)] = {
+                "kind": "file",
+                "fileid": int(child.get("fileid", 0)),
+                "webdav_path": child_remote,
+                "display_name": name,
+                "content_type": str(child.get("content_type", "")),
+                "size": int(child.get("size", 0)),
+                "etag": str(child.get("etag", "")),
+            }
+    return files, folders, skipped
+
+
+def atomic_json(path: Path, payload: object) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    with tempfile.NamedTemporaryFile("w", encoding="utf-8", dir=path.parent, delete=False) as handle:
+        json.dump(payload, handle, ensure_ascii=False, indent=2, sort_keys=True)
+        handle.write("\n")
+        temporary = Path(handle.name)
+    temporary.replace(path)
+
+
+def atomic_text(path: Path, text: str) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    with tempfile.NamedTemporaryFile("w", encoding="utf-8", dir=path.parent, delete=False) as handle:
+        handle.write(text)
+        temporary = Path(handle.name)
+    temporary.replace(path)
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--base-url", required=True)
+    parser.add_argument("--user", required=True)
+    parser.add_argument("--password-file", type=Path)
+    parser.add_argument("--root", action="append", required=True, help="WebDAV path relative to the authenticated user's files root")
+    parser.add_argument("--source-dir", required=True, type=Path)
+    parser.add_argument("--manifest", required=True, type=Path)
+    parser.add_argument("--mapping", required=True, type=Path)
+    parser.add_argument("--timeout", type=int, default=30)
+    args = parser.parse_args()
+
+    try:
+        if args.password_file:
+            password = args.password_file.read_text(encoding="utf-8").rstrip("\r\n")
+        else:
+            password = getpass.getpass("Nextcloud password: ")
+        if not password:
+            fail("Nextcloud password is empty")
+
+        source_dir = args.source_dir.resolve()
+        staging = source_dir.with_name(f".{source_dir.name}.next")
+        previous = source_dir.with_name(f".{source_dir.name}.previous")
+        seed = source_dir.parent / ".bratonien-webdav-placeholder.gif"
+        source_dir.parent.mkdir(parents=True, exist_ok=True)
+        seed.write_bytes(PLACEHOLDER)
+        os.chmod(seed, 0o644)
+        if staging.exists():
+            shutil.rmtree(staging)
+        staging.mkdir(parents=True)
+
+        client = WebDavClient(args.base_url, args.user, password, max(1, args.timeout))
+        mapping: dict[str, dict[str, object]] = {}
+        manifest: list[str] = []
+        total_files = total_folders = total_skipped = 0
+        used_names: set[str] = set()
+
+        for remote_root_raw in args.root:
+            remote_root = validate_relative(remote_root_raw)
+            current, _ = client.list_collection(remote_root)
+            fileid = int(current["fileid"])
+            display = str(current.get("display_name", "")).strip() or (PurePosixPath(remote_root).name if remote_root else args.user)
+            local_name = f"root-{fileid}"
+            if local_name in used_names:
+                fail(f"duplicate selected Nextcloud root fileid: {fileid}")
+            used_names.add(local_name)
+            local_root = staging / local_name
+            files, folders, skipped = build_root(client, remote_root, local_root, seed, mapping)
+            total_files += files
+            total_folders += folders
+            total_skipped += skipped
+            manifest.append(f"webdav:{fileid}\tfolder\t{display}\t{source_dir / local_name}")
+
+        if previous.exists():
+            shutil.rmtree(previous)
+        if source_dir.exists():
+            source_dir.rename(previous)
+        try:
+            staging.rename(source_dir)
+        except Exception:
+            if source_dir.exists():
+                shutil.rmtree(source_dir)
+            if previous.exists():
+                previous.rename(source_dir)
+            raise
+        if previous.exists():
+            shutil.rmtree(previous)
+
+        final_mapping: dict[str, dict[str, object]] = {}
+        staging_text = str(staging)
+        source_text = str(source_dir)
+        for path, data in mapping.items():
+            final_path = source_text + path[len(staging_text):] if path.startswith(staging_text) else path
+            final_mapping[final_path] = data
+
+        atomic_text(args.manifest, "\n".join(manifest) + "\n")
+        atomic_json(args.mapping, {
+            "version": 1,
+            "base_url": args.base_url.rstrip("/"),
+            "user": args.user,
+            "files": final_mapping,
+        })
+        print(json.dumps({
+            "roots": len(args.root),
+            "files": total_files,
+            "folders": total_folders,
+            "skipped": total_skipped,
+            "source_dir": str(source_dir),
+            "manifest": str(args.manifest),
+            "mapping": str(args.mapping),
+        }, ensure_ascii=False))
+        return 0
+    except Exception as error:
+        print(f"webdav-placeholder: {error}", file=sys.stderr)
+        return 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

runtime/lib/piwigo-sync.php

@@ -14,19 +14,13 @@ function fail_sync($message)
 function http_error_detail($body)
 {
   $body = trim((string)$body);
-  if ($body === '')
+  if ($body === '') return '';
-  {
-    return '';
-  }
 
   $decoded = json_decode($body, true);
   if (is_array($decoded))
   {
     $detail = (string)($decoded['message'] ?? $decoded['err'] ?? '');
-    if ($detail !== '')
+    if ($detail !== '') return $detail;
-    {
-      return $detail;
-    }
   }
 
   if (function_exists('simplexml_load_string'))
@@ -38,19 +32,12 @@ function http_error_detail($body)
     if ($xml !== false)
     {
       $detail = trim((string)($xml->message ?? $xml->err ?? ''));
-      if ($detail !== '')
+      if ($detail !== '') return $detail;
-      {
-        return $detail;
-      }
     }
   }
 
   $plain = trim(preg_replace('/\s+/', ' ', strip_tags($body)));
-  if ($plain === '')
+  return $plain === '' ? '' : mb_substr($plain, 0, 500);
-  {
-    return '';
-  }
-  return mb_substr($plain, 0, 500);
 }
 
 function http_request($url, array $fields, array $headers = array(), $cookie_file = null)
@@ -65,10 +52,7 @@ function http_request($url, array $fields, array $headers = array(), $cookie_fil
     CURLOPT_FOLLOWLOCATION => false,
     CURLOPT_USERAGENT => 'Bratonien-NC-Connector',
   );
-  if ($headers)
+  if ($headers) $options[CURLOPT_HTTPHEADER] = $headers;
-  {
-    $options[CURLOPT_HTTPHEADER] = $headers;
-  }
   if ($cookie_file !== null)
   {
     $options[CURLOPT_COOKIEJAR] = $cookie_file;
@@ -81,42 +65,29 @@ function http_request($url, array $fields, array $headers = array(), $cookie_fil
   $http = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
   curl_close($ch);
 
-  if ($body === false || $errno !== 0)
+  if ($body === false || $errno !== 0) fail_sync('HTTP-Aufruf fehlgeschlagen: '.$error);
-  {
-    fail_sync('HTTP-Aufruf fehlgeschlagen: '.$error);
-  }
   if ($http < 200 || $http >= 300)
   {
     $detail = http_error_detail((string)$body);
     fail_sync('HTTP-Aufruf antwortete mit Status '.$http.($detail !== '' ? ': '.$detail : '.'));
   }
-
   return (string)$body;
 }
 
 function xml_value_sync(SimpleXMLElement $node)
 {
   $children = $node->children();
-  if (count($children) === 0)
+  if (count($children) === 0) return (string)$node;
-  {
-    return (string)$node;
-  }
   $result = array();
   foreach ($children as $name => $child)
   {
     $value = xml_value_sync($child);
     if (array_key_exists($name, $result))
     {
-      if (!is_array($result[$name]) || !array_is_list($result[$name]))
+      if (!is_array($result[$name]) || !array_is_list($result[$name])) $result[$name] = array($result[$name]);
-      {
-        $result[$name] = array($result[$name]);
-      }
       $result[$name][] = $value;
     }
-    else
+    else $result[$name] = $value;
-    {
-      $result[$name] = $value;
-    }
   }
   return $result;
 }
@@ -126,34 +97,22 @@ function decode_ws($body)
   $decoded = json_decode((string)$body, true);
   if (!is_array($decoded))
   {
-    if (!function_exists('simplexml_load_string'))
+    if (!function_exists('simplexml_load_string')) fail_sync('Piwigo lieferte XML, aber SimpleXML ist nicht verfuegbar.');
-    {
-      fail_sync('Piwigo lieferte XML, aber SimpleXML ist nicht verfuegbar.');
-    }
     $previous = libxml_use_internal_errors(true);
     $xml = simplexml_load_string((string)$body);
     libxml_clear_errors();
     libxml_use_internal_errors($previous);
-    if ($xml === false || $xml->getName() !== 'rsp')
+    if ($xml === false || $xml->getName() !== 'rsp') fail_sync('Piwigo lieferte weder gueltiges JSON noch eine gueltige XML-Webservice-Antwort.');
-    {
-      fail_sync('Piwigo lieferte weder gueltiges JSON noch eine gueltige XML-Webservice-Antwort.');
-    }
     $decoded = array('stat'=>(string)$xml['stat']);
     foreach ($xml->children() as $name => $child)
     {
       $value = xml_value_sync($child);
       if (array_key_exists($name, $decoded))
       {
-        if (!is_array($decoded[$name]) || !array_is_list($decoded[$name]))
+        if (!is_array($decoded[$name]) || !array_is_list($decoded[$name])) $decoded[$name] = array($decoded[$name]);
-        {
-          $decoded[$name] = array($decoded[$name]);
-        }
         $decoded[$name][] = $value;
       }
-      else
+      else $decoded[$name] = $value;
-      {
-        $decoded[$name] = $value;
-      }
     }
   }
   if (($decoded['stat'] ?? '') !== 'ok')
@@ -161,87 +120,106 @@ function decode_ws($body)
     $message = (string)($decoded['message'] ?? $decoded['err'] ?? 'Piwigo-Aufruf wurde abgelehnt.');
     fail_sync($message);
   }
-
+  if (array_key_exists('result', $decoded)) return $decoded['result'];
-  if (array_key_exists('result', $decoded))
-  {
-    return $decoded['result'];
-  }
-
   unset($decoded['stat']);
   return $decoded;
 }
 
 function decrypt_blob($blob, $hex_key)
 {
-  if (!preg_match('/^[a-f0-9]{64}$/', (string)$hex_key))
+  if (!preg_match('/^[a-f0-9]{64}$/', (string)$hex_key)) fail_sync('Connector-Schluessel ist ungueltig.');
-  {
-    fail_sync('Connector-Schluessel ist ungueltig.');
-  }
   $outer = base64_decode(trim((string)$blob), true);
   $payload = is_string($outer) ? json_decode($outer, true) : null;
-  if (!is_array($payload) || (int)($payload['v'] ?? 0) !== 1)
+  if (!is_array($payload) || (int)($payload['v'] ?? 0) !== 1) fail_sync('Gespeicherte Zugangsdaten haben ein unbekanntes Format.');
-  {
-    fail_sync('Gespeicherte Zugangsdaten haben ein unbekanntes Format.');
-  }
   $iv = base64_decode((string)($payload['iv'] ?? ''), true);
   $tag = base64_decode((string)($payload['tag'] ?? ''), true);
   $cipher = base64_decode((string)($payload['data'] ?? ''), true);
   $plain = openssl_decrypt($cipher, 'aes-256-gcm', hex2bin($hex_key), OPENSSL_RAW_DATA, $iv, $tag);
-  if ($plain === false)
+  if ($plain === false) fail_sync('Gespeicherte Zugangsdaten konnten nicht entschluesselt werden.');
-  {
-    fail_sync('Gespeicherte Zugangsdaten konnten nicht entschluesselt werden.');
-  }
   return (string)$plain;
 }
 
+function ensure_webdav_site(mysqli $db, $prefixeTable, $piwigo_root, array $connection_config, $connection_id)
+{
+  if ((string)($connection_config['source_mode'] ?? '') !== 'webdav-placeholder') return 1;
+
+  $gallery_root = rtrim((string)($connection_config['parallel_gallery_root'] ?? ''), '/');
+  if ($gallery_root === '') fail_sync('WebDAV-Galeriewurzel fehlt in der Verbindungskonfiguration.');
+  $piwigo_root = rtrim((string)$piwigo_root, '/');
+  if (strpos($gallery_root, $piwigo_root.'/') !== 0)
+  {
+    fail_sync('WebDAV-Galeriewurzel liegt ausserhalb der Piwigo-Installation.');
+  }
+  if (!is_dir($gallery_root)) fail_sync('WebDAV-Galeriewurzel existiert nicht: '.$gallery_root);
+
+  $relative = ltrim(substr($gallery_root, strlen($piwigo_root)), '/');
+  if ($relative === '') fail_sync('WebDAV-Galeriewurzel darf nicht dem Piwigo-Hauptverzeichnis entsprechen.');
+  $site_url = './'.rtrim($relative, '/').'/';
+  $escaped = $db->real_escape_string($site_url);
+  $result = $db->query("SELECT id FROM `{$prefixeTable}sites` WHERE galleries_url='{$escaped}' LIMIT 1");
+  if (!$result) fail_sync('Piwigo-Site konnte nicht gelesen werden: '.$db->error);
+  if ($result->num_rows)
+  {
+    return (int)$result->fetch_assoc()['id'];
+  }
+
+  if (!$db->query("INSERT INTO `{$prefixeTable}sites` (galleries_url) VALUES ('{$escaped}')"))
+  {
+    fail_sync('Piwigo-Site fuer WebDAV-Verbindung #'.$connection_id.' konnte nicht angelegt werden: '.$db->error);
+  }
+  $site_id = (int)$db->insert_id;
+  if ($site_id < 1) fail_sync('Piwigo-Site fuer WebDAV-Verbindung #'.$connection_id.' erhielt keine gueltige ID.');
+  return $site_id;
+}
+
 try
 {
   $options = getopt('', array('piwigo-root:', 'connection-id:', 'base-url:'));
   $piwigo_root = rtrim((string)($options['piwigo-root'] ?? ''), '/');
   $connection_id = (int)($options['connection-id'] ?? 0);
   $base_url = rtrim((string)($options['base-url'] ?? 'http://127.0.0.1'), '/');
-
+  if ($piwigo_root === '' || $connection_id < 1) fail_sync('Parameter --piwigo-root und --connection-id werden benoetigt.');
-  if ($piwigo_root === '' || $connection_id < 1)
+  if (!function_exists('curl_init')) fail_sync('PHP-cURL ist nicht verfuegbar.');
-  {
-    fail_sync('Parameter --piwigo-root und --connection-id werden benoetigt.');
-  }
-  if (!function_exists('curl_init'))
-  {
-    fail_sync('PHP-cURL ist nicht verfuegbar.');
-  }
 
   $db_config = $piwigo_root.'/local/config/database.inc.php';
-  if (!is_readable($db_config))
+  if (!is_readable($db_config)) fail_sync('Piwigo-Datenbankkonfiguration ist nicht lesbar.');
-  {
-    fail_sync('Piwigo-Datenbankkonfiguration ist nicht lesbar.');
-  }
-
   $conf = array();
   $prefixeTable = 'piwigo_';
   require $db_config;
-  foreach (array('db_host','db_user','db_password','db_base') as $key)
+  foreach (array('db_host','db_user','db_password','db_base') as $key) if (!isset($conf[$key])) fail_sync('Piwigo-Datenbankkonfiguration ist unvollstaendig: '.$key);
-  {
-    if (!isset($conf[$key]))
-    {
-      fail_sync('Piwigo-Datenbankkonfiguration ist unvollstaendig: '.$key);
-    }
-  }
 
   $db = new mysqli($conf['db_host'], $conf['db_user'], $conf['db_password'], $conf['db_base']);
-  if ($db->connect_errno)
+  if ($db->connect_errno) fail_sync('Piwigo-Datenbank ist nicht erreichbar: '.$db->connect_error);
-  {
-    fail_sync('Piwigo-Datenbank ist nicht erreichbar: '.$db->connect_error);
-  }
   $db->set_charset('utf8mb4');
 
   $key_result = $db->query("SELECT value FROM `{$prefixeTable}config` WHERE param='bratonien_nc_connector_secret' LIMIT 1");
-  if (!$key_result || !$key_result->num_rows)
+  if (!$key_result || !$key_result->num_rows) fail_sync('Connector-Schluessel wurde nicht gefunden.');
-  {
-    fail_sync('Connector-Schluessel wurde nicht gefunden.');
-  }
   $hex_key = (string)$key_result->fetch_assoc()['value'];
 
+  $connection_table = $prefixeTable.'bratonien_tools_nc_connections';
+  $connection_result = $db->query('SELECT config_json, secret_blob FROM `'.$connection_table.'` WHERE id='.$connection_id.' LIMIT 1');
+  if (!$connection_result || !$connection_result->num_rows) fail_sync('Connector-Verbindung #'.$connection_id.' wurde nicht gefunden.');
+  $connection_row = $connection_result->fetch_assoc();
+  $connection_config = json_decode((string)$connection_row['config_json'], true);
+  if (!is_array($connection_config)) $connection_config = array();
+  $connection_plain = decrypt_blob((string)$connection_row['secret_blob'], $hex_key);
+  $connection_credentials = json_decode($connection_plain, true);
+  if (!is_array($connection_credentials)) $connection_credentials = array();
+
+  $site_id = ensure_webdav_site($db, $prefixeTable, $piwigo_root, $connection_config, $connection_id);
+
   $api = array('key_id'=>'', 'key_secret'=>'');
+  $connection_scoped = (string)($connection_config['piwigo_auth'] ?? '') === 'connection-scoped' || array_key_exists('api_enabled', $connection_config);
+  if ($connection_scoped)
+  {
+    if (!empty($connection_config['api_enabled']))
+    {
+      $api['key_id'] = trim((string)($connection_credentials['api_key_id'] ?? ''));
+      $api['key_secret'] = trim((string)($connection_credentials['api_key_secret'] ?? ''));
+    }
+  }
+  else
+  {
     $api_result = $db->query("SELECT value FROM `{$prefixeTable}config` WHERE param='bratonien_nc_piwigo_api' LIMIT 1");
     if ($api_result && $api_result->num_rows)
     {
@@ -257,20 +235,8 @@ try
         }
       }
     }
+  }
 
-  $connection_table = $prefixeTable.'bratonien_tools_nc_connections';
-  $connection_result = $db->query('SELECT secret_blob FROM `'.$connection_table.'` WHERE id='.$connection_id.' LIMIT 1');
-  if (!$connection_result || !$connection_result->num_rows)
-  {
-    fail_sync('Connector-Verbindung #'.$connection_id.' wurde nicht gefunden.');
-  }
-  $connection_blob = (string)$connection_result->fetch_assoc()['secret_blob'];
-  $connection_plain = decrypt_blob($connection_blob, $hex_key);
-  $connection_credentials = json_decode($connection_plain, true);
-  if (!is_array($connection_credentials))
-  {
-    $connection_credentials = array();
-  }
   $fallback_user = (string)($connection_credentials['piwigo_user'] ?? '');
   $fallback_password = (string)($connection_credentials['piwigo_password'] ?? '');
 
@@ -284,19 +250,17 @@ try
         'Accept: application/json, text/xml;q=0.9',
         'Content-Type: application/x-www-form-urlencoded',
       );
-      decode_ws(http_request(
+      decode_ws(http_request($base_url.'/ws.php?format=json', array('method'=>'bratonien.nc.syncProductive', 'site_id'=>$site_id), $headers));
-        $base_url.'/ws.php?format=json',
+      $orphan = decode_ws(http_request($base_url.'/ws.php?format=json', array('method'=>'bratonien.nc.syncOrphans', 'site_id'=>$site_id, 'simulate'=>0), $headers));
-        array('method'=>'bratonien.nc.syncProductive', 'site_id'=>1),
+      // Entfernt alte technische bratonien-webdav-N Wrapper aus Site 1,
-        $headers
+      // nachdem deren generierte Verzeichnisse beim Reconcile entfernt wurden.
-      ));
+      if ($site_id !== 1)
-      $orphan = decode_ws(http_request(
+      {
-        $base_url.'/ws.php?format=json',
+        decode_ws(http_request($base_url.'/ws.php?format=json', array('method'=>'bratonien.nc.syncOrphans', 'site_id'=>1, 'simulate'=>0), $headers));
-        array('method'=>'bratonien.nc.syncOrphans', 'site_id'=>1, 'simulate'=>0),
+      }
-        $headers
-      ));
       $added = (int)($orphan['added_orphans'] ?? 0);
       $deleted = (int)($orphan['deleted_orphans'] ?? 0);
-      echo "Piwigo-Synchronisierung per API erfolgreich\n";
+      echo "Piwigo-Synchronisierung per API erfolgreich (Site $site_id)\n";
       echo "Piwigo-Orphans synchronisiert: +$added / -$deleted\n";
       exit(0);
     }
@@ -308,56 +272,32 @@ try
   }
   else
   {
-    $api_error = 'Keine gespeicherten API-Zugangsdaten.';
+    $api_error = $connection_scoped ? 'Fuer diese Verbindung ist keine API konfiguriert.' : 'Keine gespeicherten API-Zugangsdaten.';
     fwrite(STDERR, "Piwigo-API nicht nutzbar: ".$api_error."\n");
   }
 
-  if ($fallback_user === '' || $fallback_password === '')
+  if ($fallback_user === '' || $fallback_password === '') fail_sync('Kein gespeicherter Benutzername/Passwort-Fallback fuer diese Verbindung vorhanden.');
-  {
-    fail_sync('Kein gespeicherter Benutzername/Passwort-Fallback vorhanden.');
-  }
 
   $cookie_file = tempnam(sys_get_temp_dir(), 'br-nc-sync-');
-  if ($cookie_file === false)
+  if ($cookie_file === false) fail_sync('Temporare Piwigo-Sitzung konnte nicht angelegt werden.');
-  {
-    fail_sync('Temporare Piwigo-Sitzung konnte nicht angelegt werden.');
-  }
 
   try
   {
-    decode_ws(http_request(
+    decode_ws(http_request($base_url.'/ws.php?format=json', array('method'=>'pwg.session.login', 'username'=>$fallback_user, 'password'=>$fallback_password), array(), $cookie_file));
-      $base_url.'/ws.php?format=json',
-      array('method'=>'pwg.session.login', 'username'=>$fallback_user, 'password'=>$fallback_password),
-      array(),
-      $cookie_file
-    ));
-
     http_request(
-      $base_url.'/admin.php?page=site_update&site=1',
+      $base_url.'/admin.php?page=site_update&site='.$site_id,
-      array(
+      array('sync'=>'files','display_info'=>1,'privacy_level'=>0,'sync_meta'=>1,'simulate'=>0,'subcats-included'=>1,'bratonien_connector'=>1,'submit'=>1),
-        'sync'=>'files',
-        'display_info'=>1,
-        'privacy_level'=>0,
-        'sync_meta'=>1,
-        'simulate'=>0,
-        'subcats-included'=>1,
-        'bratonien_connector'=>1,
-        'submit'=>1,
-      ),
       array(),
       $cookie_file
     );
-
+    $orphan = decode_ws(http_request($base_url.'/ws.php?format=json', array('method'=>'bratonien.nc.syncOrphans', 'site_id'=>$site_id, 'simulate'=>0), array(), $cookie_file));
-    $orphan = decode_ws(http_request(
+    if ($site_id !== 1)
-      $base_url.'/ws.php?format=json',
+    {
-      array('method'=>'bratonien.nc.syncOrphans', 'site_id'=>1, 'simulate'=>0),
+      decode_ws(http_request($base_url.'/ws.php?format=json', array('method'=>'bratonien.nc.syncOrphans', 'site_id'=>1, 'simulate'=>0), array(), $cookie_file));
-      array(),
+    }
-      $cookie_file
-    ));
     $added = (int)($orphan['added_orphans'] ?? 0);
     $deleted = (int)($orphan['deleted_orphans'] ?? 0);
-
+    echo "Piwigo-Datenbanksynchronisierung per Benutzername/Passwort-Fallback erfolgreich (Site $site_id)\n";
-    echo "Piwigo-Datenbanksynchronisierung per Benutzername/Passwort-Fallback erfolgreich\n";
     echo "Piwigo-Orphans synchronisiert: +$added / -$deleted\n";
   }
   finally

runtime/lib/precache-webdav-previews.php

@@ -0,0 +1,290 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+const BRATONIEN_WEBDAV_PREVIEW_VERSION = 2;
+const BRATONIEN_WEBDAV_PREVIEW_MAX_EDGE = 4096;
+const BRATONIEN_WEBDAV_PREVIEW_JPEG_QUALITY = 88;
+
+function fail_preview($message)
+{
+  throw new RuntimeException($message);
+}
+
+function quote_webdav_path($path)
+{
+  $parts = array_values(array_filter(explode('/', trim((string)$path, '/')), 'strlen'));
+  return implode('/', array_map('rawurlencode', $parts));
+}
+
+function fetch_remote_blob($url, $user, $password)
+{
+  $ch = curl_init($url);
+  curl_setopt_array($ch, array(
+    CURLOPT_RETURNTRANSFER => true,
+    CURLOPT_FOLLOWLOCATION => false,
+    CURLOPT_CONNECTTIMEOUT => 10,
+    CURLOPT_TIMEOUT => 120,
+    CURLOPT_HTTPAUTH => CURLAUTH_BASIC,
+    CURLOPT_USERPWD => $user.':'.$password,
+    CURLOPT_FAILONERROR => false,
+    CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Precache/0.9.6.1',
+  ));
+  $body = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $error = curl_error($ch);
+  $http = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  curl_close($ch);
+
+  if ($body === false || $errno !== 0) fail_preview('WebDAV-Bild konnte nicht geladen werden: '.$error);
+  if ($http < 200 || $http >= 300) fail_preview('WebDAV-Bild antwortete mit HTTP '.$http.'.');
+  if ($body === '') fail_preview('WebDAV-Bild ist leer.');
+  return (string)$body;
+}
+
+function preview_extension_for_entry(array $entry)
+{
+  $content_type = strtolower(trim((string)($entry['content_type'] ?? '')));
+  $path = strtolower((string)($entry['webdav_path'] ?? ''));
+  if ($content_type === 'image/png' || preg_match('/\.png$/', $path))
+  {
+    return 'png';
+  }
+  return 'jpg';
+}
+
+function preview_target_for_entry($cache_dir, $key, array $entry)
+{
+  return $cache_dir.'/'.$key.'.'.preview_extension_for_entry($entry);
+}
+
+function remove_other_preview_format($cache_dir, $key, $keep_target)
+{
+  foreach (array('jpg', 'png', 'webp') as $ext)
+  {
+    $candidate = $cache_dir.'/'.$key.'.'.$ext;
+    if ($candidate !== $keep_target && is_file($candidate)) @unlink($candidate);
+  }
+}
+
+function write_preview_imagick($blob, $target, $extension)
+{
+  $image = new Imagick();
+  try
+  {
+    $image->readImageBlob($blob);
+    if (method_exists($image, 'autoOrientImage')) @$image->autoOrientImage();
+    $image->setIteratorIndex(0);
+    $image->thumbnailImage(BRATONIEN_WEBDAV_PREVIEW_MAX_EDGE, BRATONIEN_WEBDAV_PREVIEW_MAX_EDGE, true, true);
+    $image->stripImage();
+
+    if ($extension === 'png')
+    {
+      $image->setImageFormat('png');
+    }
+    else
+    {
+      $image->setImageBackgroundColor('white');
+      if (method_exists($image, 'mergeImageLayers'))
+      {
+        $image = $image->mergeImageLayers(Imagick::LAYERMETHOD_FLATTEN);
+      }
+      $image->setImageFormat('jpeg');
+      $image->setImageCompression(Imagick::COMPRESSION_JPEG);
+      $image->setImageCompressionQuality(BRATONIEN_WEBDAV_PREVIEW_JPEG_QUALITY);
+      $image->setInterlaceScheme(Imagick::INTERLACE_PLANE);
+    }
+
+    if (!$image->writeImage($target)) fail_preview('Imagick konnte das Preview nicht schreiben.');
+  }
+  finally
+  {
+    $image->clear();
+    $image->destroy();
+  }
+}
+
+function write_preview_gd($blob, $target, $extension)
+{
+  $source = @imagecreatefromstring($blob);
+  if (!$source) fail_preview('GD konnte das Bild nicht dekodieren.');
+
+  try
+  {
+    $width = imagesx($source);
+    $height = imagesy($source);
+    if ($width < 1 || $height < 1) fail_preview('Bildabmessungen sind ungültig.');
+
+    $scale = min(1, BRATONIEN_WEBDAV_PREVIEW_MAX_EDGE / $width, BRATONIEN_WEBDAV_PREVIEW_MAX_EDGE / $height);
+    $target_width = max(1, (int)round($width * $scale));
+    $target_height = max(1, (int)round($height * $scale));
+    $preview = imagecreatetruecolor($target_width, $target_height);
+    if (!$preview) fail_preview('GD konnte die Preview-Arbeitsfläche nicht anlegen.');
+
+    try
+    {
+      if ($extension === 'png')
+      {
+        imagealphablending($preview, false);
+        imagesavealpha($preview, true);
+        $transparent = imagecolorallocatealpha($preview, 0, 0, 0, 127);
+        imagefilledrectangle($preview, 0, 0, $target_width, $target_height, $transparent);
+      }
+      else
+      {
+        $white = imagecolorallocate($preview, 255, 255, 255);
+        imagefilledrectangle($preview, 0, 0, $target_width, $target_height, $white);
+      }
+
+      if (!imagecopyresampled($preview, $source, 0, 0, 0, 0, $target_width, $target_height, $width, $height))
+      {
+        fail_preview('GD konnte das Preview nicht skalieren.');
+      }
+
+      $written = $extension === 'png'
+        ? imagepng($preview, $target, 6)
+        : imagejpeg($preview, $target, BRATONIEN_WEBDAV_PREVIEW_JPEG_QUALITY);
+      if (!$written) fail_preview('GD konnte das Preview nicht schreiben.');
+    }
+    finally
+    {
+      imagedestroy($preview);
+    }
+  }
+  finally
+  {
+    imagedestroy($source);
+  }
+}
+
+function write_preview($blob, $target, $extension)
+{
+  $dir = dirname($target);
+  if (!is_dir($dir) && !mkdir($dir, 0755, true) && !is_dir($dir)) fail_preview('Preview-Verzeichnis konnte nicht angelegt werden.');
+
+  if (class_exists('Imagick'))
+  {
+    write_preview_imagick($blob, $target, $extension);
+  }
+  elseif (function_exists('imagecreatefromstring') && function_exists('imagejpeg') && function_exists('imagepng'))
+  {
+    write_preview_gd($blob, $target, $extension);
+  }
+  else
+  {
+    fail_preview('Weder Imagick noch GD ist für die Preview-Erzeugung verfügbar.');
+  }
+
+  clearstatcache(true, $target);
+  $size = @getimagesize($target);
+  if (!is_array($size) || empty($size[0]) || empty($size[1]) || !is_file($target) || filesize($target) < 64)
+  {
+    @unlink($target);
+    fail_preview('Das erzeugte Preview ist ungültig.');
+  }
+  @chmod($target, 0644);
+}
+
+try
+{
+  $options = getopt('', array('mapping:', 'base-url:', 'user:', 'password-file:', 'cache-dir:'));
+  $mapping_file = (string)($options['mapping'] ?? '');
+  $base_url = rtrim((string)($options['base-url'] ?? ''), '/');
+  $user = trim((string)($options['user'] ?? ''));
+  $password_file = (string)($options['password-file'] ?? '');
+  $cache_dir = rtrim((string)($options['cache-dir'] ?? ''), '/');
+
+  if ($mapping_file === '' || !is_readable($mapping_file)) fail_preview('WebDAV-Mapping ist nicht lesbar.');
+  if ($base_url === '' || $user === '' || $password_file === '' || !is_readable($password_file) || $cache_dir === '') fail_preview('Preview-Parameter sind unvollständig.');
+  if (!function_exists('curl_init')) fail_preview('PHP-cURL ist nicht verfügbar.');
+
+  $password = rtrim((string)file_get_contents($password_file), "\r\n");
+  if ($password === '') fail_preview('Nextcloud-Passwort fehlt.');
+
+  $mapping = json_decode((string)file_get_contents($mapping_file), true);
+  if (!is_array($mapping) || !isset($mapping['files']) || !is_array($mapping['files'])) fail_preview('WebDAV-Mapping ist ungültig.');
+
+  if (!is_dir($cache_dir) && !mkdir($cache_dir, 0755, true) && !is_dir($cache_dir)) fail_preview('Preview-Cache konnte nicht angelegt werden.');
+  @chmod($cache_dir, 0755);
+
+  $state_file = $cache_dir.'/state.json';
+  $old_state = array();
+  if (is_readable($state_file))
+  {
+    $decoded = json_decode((string)file_get_contents($state_file), true);
+    if (is_array($decoded)) $old_state = $decoded;
+  }
+
+  $new_state = array();
+  $generated = 0;
+  $cached = 0;
+  $errors = 0;
+
+  foreach ($mapping['files'] as $entry)
+  {
+    if (!is_array($entry) || (string)($entry['kind'] ?? '') !== 'file') continue;
+    $webdav_path = trim((string)($entry['webdav_path'] ?? ''), '/');
+    if ($webdav_path === '') continue;
+
+    $etag = (string)($entry['etag'] ?? '');
+    $key = sha1($webdav_path);
+    $target = preview_target_for_entry($cache_dir, $key, $entry);
+    $extension = pathinfo($target, PATHINFO_EXTENSION);
+    $new_state[$key] = array(
+      'path' => $webdav_path,
+      'etag' => $etag,
+      'format' => $extension,
+      'version' => BRATONIEN_WEBDAV_PREVIEW_VERSION,
+    );
+
+    $old = $old_state[$key] ?? null;
+    if (
+      is_file($target)
+      && is_array($old)
+      && (string)($old['etag'] ?? '') === $etag
+      && (string)($old['format'] ?? '') === $extension
+      && (int)($old['version'] ?? 0) === BRATONIEN_WEBDAV_PREVIEW_VERSION
+    )
+    {
+      $cached++;
+      continue;
+    }
+
+    try
+    {
+      $url = $base_url.'/remote.php/dav/files/'.rawurlencode($user).'/'.quote_webdav_path($webdav_path);
+      $blob = fetch_remote_blob($url, $user, $password);
+      write_preview($blob, $target, $extension);
+      remove_other_preview_format($cache_dir, $key, $target);
+      $generated++;
+    }
+    catch (Throwable $e)
+    {
+      $errors++;
+      fwrite(STDERR, $webdav_path.': '.$e->getMessage()."\n");
+    }
+  }
+
+  foreach (glob($cache_dir.'/*') ?: array() as $file)
+  {
+    if (!is_file($file) || basename($file) === 'state.json') continue;
+    $name = basename($file);
+    if (!preg_match('/^([a-f0-9]{40})\.(jpg|png|webp)$/', $name, $m)) continue;
+    if (!isset($new_state[$m[1]])) @unlink($file);
+  }
+
+  file_put_contents($state_file, json_encode($new_state, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT)."\n", LOCK_EX);
+  @chmod($state_file, 0644);
+
+  echo 'WebDAV-Previews: erzeugt='.$generated.' vorhanden='.$cached.' fehler='.$errors."\n";
+  exit($errors > 0 ? 1 : 0);
+}
+catch (Throwable $e)
+{
+  fwrite(STDERR, 'WebDAV-Preview-Cache: '.$e->getMessage()."\n");
+  exit(1);
+}

runtime/reconcile-webdav.php

@@ -0,0 +1,255 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+function fail_webdav_reconcile($message)
+{
+  throw new RuntimeException($message);
+}
+
+function decrypt_webdav_credentials($blob, $hexKey)
+{
+  if (!preg_match('/^[a-f0-9]{64}$/', (string)$hexKey)) fail_webdav_reconcile('Connector-Schluessel ist ungueltig.');
+  $outer = base64_decode(trim((string)$blob), true);
+  $payload = is_string($outer) ? json_decode($outer, true) : null;
+  if (!is_array($payload) || (int)($payload['v'] ?? 0) !== 1) fail_webdav_reconcile('Connector-Zugangsdaten haben ein unbekanntes Format.');
+  $iv = base64_decode((string)($payload['iv'] ?? ''), true);
+  $tag = base64_decode((string)($payload['tag'] ?? ''), true);
+  $cipher = base64_decode((string)($payload['data'] ?? ''), true);
+  $plain = openssl_decrypt($cipher, 'aes-256-gcm', hex2bin($hexKey), OPENSSL_RAW_DATA, $iv, $tag);
+  if ($plain === false || $plain === '') fail_webdav_reconcile('Connector-Zugangsdaten konnten nicht entschluesselt werden.');
+  $decoded = json_decode($plain, true);
+  if (!is_array($decoded)) fail_webdav_reconcile('WebDAV-Verbindung besitzt kein kompatibles Secret-Format.');
+  return array(
+    'nextcloud_user'=>(string)($decoded['nextcloud_user'] ?? ''),
+    'nextcloud_password'=>(string)($decoded['nextcloud_password'] ?? ''),
+  );
+}
+
+function webdav_shell_value($value)
+{
+  return escapeshellarg((string)$value);
+}
+
+function webdav_remove_generated_tree($path, $allowedRoot)
+{
+  $path = rtrim((string)$path, '/');
+  $allowedRoot = rtrim((string)$allowedRoot, '/');
+  if ($path === '' || $allowedRoot === '' || strpos($path, $allowedRoot.'/') !== 0 || !file_exists($path)) return;
+  if (is_link($path) || is_file($path))
+  {
+    @unlink($path);
+    return;
+  }
+  $items = scandir($path);
+  if (is_array($items))
+  {
+    foreach ($items as $item)
+    {
+      if ($item === '.' || $item === '..') continue;
+      webdav_remove_generated_tree($path.'/'.$item, $allowedRoot);
+    }
+  }
+  @rmdir($path);
+}
+
+function webdav_source_fingerprint($baseUrl, $user, array $roots)
+{
+  $normalized = array();
+  foreach ($roots as $root)
+  {
+    $normalized[] = array(
+      'fileid'=>(int)($root['fileid'] ?? 0),
+      'path'=>trim((string)($root['webdav_path'] ?? ''), '/'),
+    );
+  }
+  usort($normalized, function($a, $b)
+  {
+    $cmp = $a['fileid'] <=> $b['fileid'];
+    return $cmp !== 0 ? $cmp : strcmp($a['path'], $b['path']);
+  });
+  return hash('sha256', strtolower(rtrim((string)$baseUrl, '/'))."\n".strtolower(trim((string)$user))."\n".json_encode($normalized));
+}
+
+$pluginRoot = dirname(__DIR__);
+$piwigoRoot = dirname($pluginRoot, 2);
+$dbConfig = $piwigoRoot.'/local/config/database.inc.php';
+$configDir = '/etc/bratonien-tools/nc-connector';
+$stateRoot = '/var/lib/bratonien-tools/nc-connector';
+$publicSourceRoot = rtrim($piwigoRoot, '/').'/_data/bratonien-tools/nc-webdav-source';
+$publicGalleryRoot = rtrim($piwigoRoot, '/').'/_data/bratonien-tools/nc-webdav-gallery';
+$legacyGalleryRoot = rtrim($piwigoRoot, '/').'/galleries';
+
+try
+{
+  if (!is_readable($dbConfig)) fail_webdav_reconcile('Piwigo-Datenbankkonfiguration ist nicht lesbar: '.$dbConfig);
+  $conf = array();
+  $prefixeTable = 'piwigo_';
+  require $dbConfig;
+  foreach (array('db_host','db_user','db_password','db_base') as $key)
+  {
+    if (!isset($conf[$key])) fail_webdav_reconcile('Piwigo-Datenbankkonfiguration ist unvollstaendig: '.$key);
+  }
+
+  $db = new mysqli($conf['db_host'], $conf['db_user'], $conf['db_password'], $conf['db_base']);
+  if ($db->connect_errno) fail_webdav_reconcile('Piwigo-Datenbank ist nicht erreichbar: '.$db->connect_error);
+  $db->set_charset('utf8mb4');
+
+  $keyResult = $db->query("SELECT value FROM `{$prefixeTable}config` WHERE param='bratonien_nc_connector_secret' LIMIT 1");
+  if (!$keyResult || !$keyResult->num_rows) fail_webdav_reconcile('Connector-Schluessel wurde nicht gefunden.');
+  $hexKey = trim((string)$keyResult->fetch_assoc()['value']);
+
+  $table = $prefixeTable.'bratonien_tools_nc_connections';
+  $rows = $db->query("SELECT id,name,adapter,config_json,secret_blob FROM `{$table}` ORDER BY id DESC");
+  if (!$rows) fail_webdav_reconcile('Connector-Verbindungen konnten nicht gelesen werden: '.$db->error);
+
+  foreach (array($configDir=>$configDir, $publicSourceRoot=>$publicSourceRoot, $publicGalleryRoot=>$publicGalleryRoot) as $dir=>$unused)
+  {
+    if (!is_dir($dir) && !mkdir($dir, $dir === $configDir ? 0700 : 0755, true)) fail_webdav_reconcile('Runtime-Verzeichnis konnte nicht angelegt werden: '.$dir);
+  }
+  @chmod($configDir, 0700);
+  @chmod($publicSourceRoot, 0755);
+  @chmod($publicGalleryRoot, 0755);
+
+  $known = array();
+  $seenFingerprints = array();
+
+  while ($row = $rows->fetch_assoc())
+  {
+    $id = (int)$row['id'];
+    $config = json_decode((string)$row['config_json'], true);
+    if (!is_array($config)) $config = array();
+    if ((string)$row['adapter'] !== 'remote') continue;
+    if ((string)($config['source_mode'] ?? '') !== 'webdav-placeholder') continue;
+    if (empty($config['parallel_test'])) continue;
+
+    try
+    {
+      $baseUrl = rtrim(trim((string)($config['nextcloud_url'] ?? '')), '/');
+      $roots = isset($config['roots']) && is_array($config['roots']) ? $config['roots'] : array();
+      if ($baseUrl === '') fail_webdav_reconcile('Nextcloud-Adresse fehlt.');
+      if (!$roots) fail_webdav_reconcile('Keine WebDAV-Wurzeln gespeichert.');
+
+      $credentials = decrypt_webdav_credentials((string)$row['secret_blob'], $hexKey);
+      $user = trim($credentials['nextcloud_user']);
+      $password = $credentials['nextcloud_password'];
+      if ($user === '' || $password === '') fail_webdav_reconcile('Nextcloud-Zugangsdaten fehlen.');
+
+      $fingerprint = webdav_source_fingerprint($baseUrl, $user, $roots);
+      if (isset($seenFingerprints[$fingerprint]))
+      {
+        fwrite(STDERR, "NC WebDAV #{$id}: identische Quelle bereits durch Verbindung #".$seenFingerprints[$fingerprint]." abgedeckt; doppelte Runtime wird unterdrueckt.\n");
+        foreach (glob($configDir.'/webdav-connection-'.$id.'.*') ?: array() as $stale) @unlink($stale);
+        webdav_remove_generated_tree($legacyGalleryRoot.'/bratonien-webdav-'.$id, $legacyGalleryRoot);
+        webdav_remove_generated_tree($publicGalleryRoot.'/connection-'.$id, $publicGalleryRoot);
+        continue;
+      }
+      $seenFingerprints[$fingerprint] = $id;
+      $known[$id] = true;
+
+      $stateDir = rtrim((string)($config['state_dir'] ?? ''), '/');
+      if ($stateDir === '') $stateDir = $stateRoot.'/connection-'.$id;
+      if (!is_dir($stateDir) && !mkdir($stateDir, 0750, true)) fail_webdav_reconcile('State-Verzeichnis konnte nicht angelegt werden.');
+      @chmod($stateDir, 0750);
+
+      $legacyDefault = $legacyGalleryRoot.'/bratonien-webdav-'.$id;
+      $galleryRoot = rtrim((string)($config['parallel_gallery_root'] ?? ''), '/');
+      if ($galleryRoot === '' || $galleryRoot === $legacyDefault || strpos($galleryRoot, $legacyGalleryRoot.'/bratonien-webdav-') === 0)
+      {
+        $galleryRoot = $publicGalleryRoot.'/connection-'.$id;
+      }
+      if (!is_dir($galleryRoot) && !mkdir($galleryRoot, 0755, true)) fail_webdav_reconcile('WebDAV-Galeriebereich konnte nicht angelegt werden.');
+      @chmod($galleryRoot, 0755);
+
+      // Alte technische Wrapper unter ./galleries duerfen nicht als Piwigo-Alben auftauchen.
+      webdav_remove_generated_tree($legacyDefault, $legacyGalleryRoot);
+
+      $sourceDir = $publicSourceRoot.'/connection-'.$id;
+      if (!is_dir($sourceDir) && !mkdir($sourceDir, 0755, true)) fail_webdav_reconcile('WebDAV-Platzhalterquelle konnte nicht angelegt werden.');
+      @chmod($sourceDir, 0755);
+
+      $base = $configDir.'/webdav-connection-'.$id;
+      $passwordPath = $base.'.nextcloud-password';
+      $rootsPath = $base.'.roots.tsv';
+      $configPath = $base.'.conf';
+      $statusFile = $stateDir.'/connector-status.json';
+      $mappingFile = $stateDir.'/webdav-map.json';
+      $manifestFile = $stateDir.'/webdav-manifest.tsv';
+      $shadowMapFile = $stateDir.'/webdav-shadow-map.json';
+
+      file_put_contents($passwordPath, $password."\n", LOCK_EX);
+      @chmod($passwordPath, 0600);
+
+      $rootLines = array('# webdav_path<TAB>display_name');
+      foreach ($roots as $root)
+      {
+        $path = trim((string)($root['webdav_path'] ?? ''), '/');
+        $display = trim((string)($root['display_name'] ?? ''));
+        if ($path === '' || $display === '' || preg_match('/[\t\r\n]/', $path.$display)) fail_webdav_reconcile('Eine gespeicherte WebDAV-Wurzel ist ungueltig.');
+        $rootLines[] = $path."\t".$display;
+      }
+      file_put_contents($rootsPath, implode("\n", $rootLines)."\n", LOCK_EX);
+      @chmod($rootsPath, 0600);
+
+      $lines = array(
+        'PIWIGO_ROOT='.webdav_shell_value($piwigoRoot),
+        'CONNECTION_ID='.$id,
+        'SOURCE_MODE=webdav-placeholder',
+        'WEBDAV_BASE_URL='.webdav_shell_value($baseUrl),
+        'WEBDAV_USER='.webdav_shell_value($user),
+        'WEBDAV_PASSWORD_FILE='.webdav_shell_value($passwordPath),
+        'WEBDAV_ROOTS_FILE='.webdav_shell_value($rootsPath),
+        'WEBDAV_SOURCE_DIR='.webdav_shell_value($sourceDir),
+        'WEBDAV_MAPPING_FILE='.webdav_shell_value($mappingFile),
+        'MANIFEST='.webdav_shell_value($manifestFile),
+        'SHADOW_MAP_FILE='.webdav_shell_value($shadowMapFile),
+        'GALLERY_ROOT='.webdav_shell_value($galleryRoot),
+        'STATE_DIR='.webdav_shell_value($stateDir),
+        'STATUS_FILE='.webdav_shell_value($statusFile),
+        'PIWIGO_SYNC_ENABLED=1',
+      );
+      file_put_contents($configPath, implode("\n", $lines)."\n", LOCK_EX);
+      @chmod($configPath, 0600);
+
+      $config['state_dir'] = $stateDir;
+      $config['status_file'] = $statusFile;
+      $config['parallel_gallery_root'] = $galleryRoot;
+      $config['source_fingerprint'] = $fingerprint;
+      $config['runtime'] = array(
+        'mode'=>'parallel-webdav',
+        'config'=>$configPath,
+        'piwigo_sync_enabled'=>true,
+        'reconciled_at'=>date('Y-m-d H:i:s'),
+      );
+      $json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+      if (is_string($json))
+      {
+        $escaped = $db->real_escape_string($json);
+        $db->query("UPDATE `{$table}` SET config_json='{$escaped}' WHERE id={$id} LIMIT 1");
+      }
+    }
+    catch (Throwable $e)
+    {
+      fwrite(STDERR, "NC WebDAV #{$id}: ".$e->getMessage()."\n");
+    }
+  }
+
+  foreach (glob($configDir.'/webdav-connection-*.conf') ?: array() as $path)
+  {
+    if (!preg_match('/webdav-connection-([0-9]+)\.conf$/', $path, $match)) continue;
+    $id = (int)$match[1];
+    if (isset($known[$id])) continue;
+    foreach (glob($configDir.'/webdav-connection-'.$id.'.*') ?: array() as $stale) @unlink($stale);
+  }
+
+  exit(0);
+}
+catch (Throwable $e)
+{
+  fwrite(STDERR, "NC WebDAV Reconcile: ".$e->getMessage()."\n");
+  exit(1);
+}

runtime/reconcile.php

@@ -0,0 +1,336 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+function fail_reconcile($message)
+{
+  throw new RuntimeException($message);
+}
+
+function decrypt_reconcile($blob, $hexKey)
+{
+  if (!preg_match('/^[a-f0-9]{64}$/', (string)$hexKey)) fail_reconcile('Connector-Schluessel ist ungueltig.');
+  $outer = base64_decode(trim((string)$blob), true);
+  $payload = is_string($outer) ? json_decode($outer, true) : null;
+  if (!is_array($payload) || (int)($payload['v'] ?? 0) !== 1) fail_reconcile('Connector-Zugangsdaten haben ein unbekanntes Format.');
+  $iv = base64_decode((string)($payload['iv'] ?? ''), true);
+  $tag = base64_decode((string)($payload['tag'] ?? ''), true);
+  $cipher = base64_decode((string)($payload['data'] ?? ''), true);
+  $plain = openssl_decrypt($cipher, 'aes-256-gcm', hex2bin($hexKey), OPENSSL_RAW_DATA, $iv, $tag);
+  if ($plain === false || $plain === '') fail_reconcile('Connector-Zugangsdaten konnten nicht entschluesselt werden.');
+  $decoded = json_decode($plain, true);
+  if (!is_array($decoded))
+  {
+    return array('db_password'=>$plain,'piwigo_user'=>'','piwigo_password'=>'','api_key_id'=>'','api_key_secret'=>'');
+  }
+  return array(
+    'db_password'=>(string)($decoded['db_password'] ?? ''),
+    'piwigo_user'=>(string)($decoded['piwigo_user'] ?? ''),
+    'piwigo_password'=>(string)($decoded['piwigo_password'] ?? ''),
+    'api_key_id'=>(string)($decoded['api_key_id'] ?? ''),
+    'api_key_secret'=>(string)($decoded['api_key_secret'] ?? ''),
+  );
+}
+
+function encrypt_reconcile(array $credentials, $hexKey)
+{
+  $plain = json_encode(array(
+    'v'=>2,
+    'db_password'=>(string)$credentials['db_password'],
+    'piwigo_user'=>(string)$credentials['piwigo_user'],
+    'piwigo_password'=>(string)$credentials['piwigo_password'],
+    'api_key_id'=>(string)$credentials['api_key_id'],
+    'api_key_secret'=>(string)$credentials['api_key_secret'],
+  ), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($plain)) fail_reconcile('Connector-Zugangsdaten konnten nicht serialisiert werden.');
+  $iv = random_bytes(12);
+  $tag = '';
+  $cipher = openssl_encrypt($plain, 'aes-256-gcm', hex2bin($hexKey), OPENSSL_RAW_DATA, $iv, $tag);
+  if ($cipher === false) fail_reconcile('Connector-Zugangsdaten konnten nicht verschluesselt werden.');
+  return base64_encode(json_encode(array(
+    'v'=>1,
+    'iv'=>base64_encode($iv),
+    'tag'=>base64_encode($tag),
+    'data'=>base64_encode($cipher),
+  )));
+}
+
+function write_runtime_status($piwigoRoot, $id, $stateDir, $message)
+{
+  $payload = json_encode(array(
+    'state'=>'error',
+    'message'=>'Runtime-Vorbereitung fehlgeschlagen',
+    'timestamp'=>time(),
+    'auth_mode'=>'failed',
+    'api'=>array('state'=>'not_run','message'=>''),
+    'fallback'=>array('state'=>'not_run','message'=>''),
+    'error_detail'=>(string)$message,
+  ), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+  if (!is_string($payload)) return;
+  $targets = array(rtrim($piwigoRoot, '/').'/_data/bratonien-tools/nc-connector-status/connection-'.$id.'.json');
+  if ($stateDir !== '') $targets[] = rtrim($stateDir, '/').'/connector-status.json';
+  foreach ($targets as $target)
+  {
+    $dir = dirname($target);
+    if (!is_dir($dir)) @mkdir($dir, 0755, true);
+    @file_put_contents($target, $payload."\n", LOCK_EX);
+    @chmod($target, 0644);
+  }
+}
+
+function sql_reconcile(mysqli $db, $value)
+{
+  return $db->real_escape_string((string)$value);
+}
+
+function nextcloud_view_available(array $config, $password, $view)
+{
+  if (!preg_match('/^[A-Za-z_][A-Za-z0-9_]*$/', (string)$view)) return false;
+  $spec = array(0=>array('file','/dev/null','r'),1=>array('pipe','w'),2=>array('pipe','w'));
+  $command = array(
+    'psql','-XAt','-v','ON_ERROR_STOP=1',
+    '-h',(string)$config['host'],'-p',(string)$config['port'],'-U',(string)$config['user'],'-d',(string)$config['database'],
+    '-c','SELECT 1 FROM '.$view.' LIMIT 1'
+  );
+  $env = $_ENV;
+  $env['PGPASSWORD'] = (string)$password;
+  $process = @proc_open($command, $spec, $pipes, null, $env);
+  if (!is_resource($process)) return false;
+  stream_get_contents($pipes[1]);
+  stream_get_contents($pipes[2]);
+  fclose($pipes[1]); fclose($pipes[2]);
+  return proc_close($process) === 0;
+}
+
+function configured_access_user(array $config)
+{
+  foreach (array('access_user','nextcloud_access_user','showcase_user') as $key)
+  {
+    $value = trim((string)($config[$key] ?? ''));
+    if ($value !== '') return $value;
+  }
+  return '';
+}
+
+$pluginRoot = dirname(__DIR__);
+$piwigoRoot = dirname($pluginRoot, 2);
+$dbConfig = $piwigoRoot.'/local/config/database.inc.php';
+$configDir = '/etc/bratonien-tools/nc-connector';
+$stateRoot = '/var/lib/bratonien-tools/nc-connector';
+
+try
+{
+  if (!is_readable($dbConfig)) fail_reconcile('Piwigo-Datenbankkonfiguration ist nicht lesbar: '.$dbConfig);
+  $conf = array();
+  $prefixeTable = 'piwigo_';
+  require $dbConfig;
+  foreach (array('db_host','db_user','db_password','db_base') as $key)
+  {
+    if (!isset($conf[$key])) fail_reconcile('Piwigo-Datenbankkonfiguration ist unvollstaendig: '.$key);
+  }
+
+  $db = new mysqli($conf['db_host'], $conf['db_user'], $conf['db_password'], $conf['db_base']);
+  if ($db->connect_errno) fail_reconcile('Piwigo-Datenbank ist nicht erreichbar: '.$db->connect_error);
+  $db->set_charset('utf8mb4');
+
+  $keyResult = $db->query("SELECT value FROM `{$prefixeTable}config` WHERE param='bratonien_nc_connector_secret' LIMIT 1");
+  if (!$keyResult || !$keyResult->num_rows) fail_reconcile('Connector-Schluessel wurde nicht gefunden.');
+  $hexKey = trim((string)$keyResult->fetch_assoc()['value']);
+
+  $table = $prefixeTable.'bratonien_tools_nc_connections';
+  $rows = $db->query("SELECT id,name,adapter,enabled,takeover_state,config_json,secret_blob FROM `{$table}` ORDER BY id");
+  if (!$rows) fail_reconcile('Connector-Verbindungen konnten nicht gelesen werden: '.$db->error);
+
+  if (!is_dir($configDir) && !mkdir($configDir, 0700, true)) fail_reconcile('Runtime-Konfigurationsverzeichnis konnte nicht angelegt werden.');
+  chmod($configDir, 0700);
+
+  while ($row = $rows->fetch_assoc())
+  {
+    $id = (int)$row['id'];
+    $config = json_decode((string)$row['config_json'], true);
+    if (!is_array($config)) $config = array();
+    $stateDir = rtrim((string)($config['state_dir'] ?? ''), '/');
+    if ($stateDir === '') $stateDir = $stateRoot.'/connection-'.$id;
+
+    try
+    {
+      if ((string)$row['adapter'] !== 'local') continue;
+      $isActive = (int)$row['enabled'] === 1 && (string)$row['takeover_state'] === 'active';
+      $accessUser = configured_access_user($config);
+      $wizardConnection = (string)($config['origin'] ?? '') === 'native'
+        && trim((string)($config['nextcloud_url'] ?? '')) !== ''
+        && $accessUser !== '';
+      $verification = isset($config['verification']) && is_array($config['verification']) ? $config['verification'] : null;
+      $verificationFailed = is_array($verification) && empty($verification['ok']);
+      if (!$isActive && (!$wizardConnection || $verificationFailed)) continue;
+
+      foreach (array('host','port','database','user','source_view','activity_view','gallery_root') as $key)
+      {
+        if (trim((string)($config[$key] ?? '')) === '') fail_reconcile('Konfiguration unvollstaendig: '.$key.' fehlt.');
+      }
+      $storages = isset($config['storages']) && is_array($config['storages']) ? $config['storages'] : array();
+      if (!$storages) fail_reconcile('Keine Storage-Zuordnungen gespeichert.');
+
+      $credentials = decrypt_reconcile((string)$row['secret_blob'], $hexKey);
+      if ($credentials['db_password'] === '') fail_reconcile('Datenbankpasswort fehlt.');
+
+      $sourceMode = trim((string)($config['source_mode'] ?? ''));
+      if ($sourceMode === 'user-filesystem')
+      {
+        @unlink($configDir.'/connection-'.$id.'.conf');
+        fail_reconcile('Diese Verbindung verwendet den verworfenen experimentellen Benutzerpfad-Modus. Bitte die Verbindung mit dem aktuellen Assistenten neu anlegen.');
+      }
+
+      if ($sourceMode === '' || $sourceMode === 'legacy-view')
+      {
+        $canMigrate = $accessUser !== ''
+          && nextcloud_view_available($config, $credentials['db_password'], 'piwigo_connector_shares')
+          && nextcloud_view_available($config, $credentials['db_password'], 'piwigo_connector_activity');
+        if ($canMigrate)
+        {
+          $sourceMode = 'user-shares';
+          $config['source_mode'] = $sourceMode;
+          $config['source_view'] = 'piwigo_connector_shares';
+          $config['activity_view'] = 'piwigo_connector_activity';
+          $config['access_user'] = $accessUser;
+          $config['nextcloud_access_user'] = $accessUser;
+          unset($config['showcase_user']);
+          echo "NC Connector: Verbindung #{$id} auf generische benutzergefilterte Quellen migriert.\n";
+        }
+        else
+        {
+          $sourceMode = 'legacy-view';
+          $config['source_mode'] = $sourceMode;
+        }
+      }
+
+      if (!in_array($sourceMode, array('legacy-view','user-shares','selected-fileids'), true)) fail_reconcile('Unbekannter Quellenmodus: '.$sourceMode);
+      if ($sourceMode !== 'legacy-view' && $accessUser === '') fail_reconcile('Für die verbindungsbezogene Quelle fehlt der Nextcloud-Benutzer.');
+
+      $roots = isset($config['roots']) && is_array($config['roots']) ? $config['roots'] : array();
+      if ($sourceMode === 'selected-fileids' && !$roots) fail_reconcile('Für die Verbindung sind keine ausgewählten Nextcloud-Datei-IDs gespeichert.');
+
+      if (!$isActive && !array_key_exists('api_enabled', $config))
+      {
+        $hasFallback = $credentials['piwigo_user'] !== '' && $credentials['piwigo_password'] !== '';
+        if (!$hasFallback) fail_reconcile('Die Verbindung besitzt weder einen eigenen API-Zugang noch einen eigenen Fallback.');
+        $credentials['api_key_id'] = '';
+        $credentials['api_key_secret'] = '';
+        $config['piwigo_auth'] = 'connection-scoped';
+        $config['api_enabled'] = false;
+        $row['secret_blob'] = encrypt_reconcile($credentials, $hexKey);
+      }
+
+      $connectionScoped = (string)($config['piwigo_auth'] ?? '') === 'connection-scoped' || array_key_exists('api_enabled', $config);
+      if ($connectionScoped)
+      {
+        $apiAvailable = !empty($config['api_enabled']) && $credentials['api_key_id'] !== '' && $credentials['api_key_secret'] !== '';
+        $fallbackAvailable = $credentials['piwigo_user'] !== '' && $credentials['piwigo_password'] !== '';
+        if (!$apiAvailable && !$fallbackAvailable) fail_reconcile('Kein verbindungseigener Piwigo-Zugang gespeichert.');
+      }
+
+      if (!is_dir($stateDir) && !mkdir($stateDir, 0750, true)) fail_reconcile('State-Verzeichnis konnte nicht angelegt werden.');
+      chmod($stateDir, 0750);
+
+      $base = $configDir.'/connection-'.$id;
+      $dbPasswordPath = $base.'.db-password';
+      $piwigoPasswordPath = $base.'.piwigo-password';
+      $storagePath = $base.'.storages.tsv';
+      $rootsPath = $base.'.roots.tsv';
+      $configPath = $base.'.conf';
+      $statusFile = $stateDir.'/connector-status.json';
+
+      file_put_contents($dbPasswordPath, $credentials['db_password']."\n", LOCK_EX);
+      chmod($dbPasswordPath, 0600);
+
+      $fallbackAvailable = $credentials['piwigo_user'] !== '' && $credentials['piwigo_password'] !== '';
+      if ($fallbackAvailable)
+      {
+        file_put_contents($piwigoPasswordPath, $credentials['piwigo_password']."\n", LOCK_EX);
+        chmod($piwigoPasswordPath, 0600);
+      }
+      else @unlink($piwigoPasswordPath);
+
+      $storageLines = array('# storage_id<TAB>source_prefix<TAB>local_mount<TAB>include_prefix');
+      foreach ($storages as $storage)
+      {
+        $storageLines[] = (string)($storage['storage_id'] ?? '')."\t"
+          .trim((string)($storage['source_prefix'] ?? ''), '/')."\t"
+          .(string)($storage['local_mount'] ?? '')."\t"
+          .trim((string)($storage['include_prefix'] ?? ''), '/');
+      }
+      file_put_contents($storagePath, implode("\n", $storageLines)."\n", LOCK_EX);
+      chmod($storagePath, 0600);
+
+      if ($sourceMode === 'selected-fileids')
+      {
+        $rootLines = array('# fileid<TAB>display_name');
+        foreach ($roots as $root)
+        {
+          $fileid = (int)($root['fileid'] ?? 0);
+          $display = trim((string)($root['display_name'] ?? ''));
+          if ($fileid < 1 || $display === '' || preg_match('/[\t\r\n]/', $display)) fail_reconcile('Eine gespeicherte Nextcloud-Quelle ist ungueltig.');
+          $rootLines[] = $fileid."\t".$display;
+        }
+        file_put_contents($rootsPath, implode("\n", $rootLines)."\n", LOCK_EX);
+        chmod($rootsPath, 0600);
+      }
+      else @unlink($rootsPath);
+
+      $lines = array(
+        'PIWIGO_ROOT='.$piwigoRoot,
+        'GALLERY_ROOT='.(string)$config['gallery_root'],
+        'STATE_DIR='.$stateDir,
+        'STATUS_FILE='.$statusFile,
+        'NC_DB_HOST='.(string)$config['host'],
+        'NC_DB_PORT='.(string)$config['port'],
+        'NC_DB_NAME='.(string)$config['database'],
+        'NC_DB_USER='.(string)$config['user'],
+        'NC_DB_VIEW='.(string)$config['source_view'],
+        'NC_ACTIVITY_VIEW='.(string)$config['activity_view'],
+        'NC_DB_PASSWORD_FILE='.$dbPasswordPath,
+        'STORAGE_CONFIG='.$storagePath,
+        'SOURCE_MODE='.$sourceMode,
+        'QUIET_SECONDS='.(int)($config['quiet_seconds'] ?? 120),
+        'MAX_WAIT_SECONDS='.(int)($config['max_wait_seconds'] ?? 900),
+        'FULL_SYNC_SECONDS='.(int)($config['full_sync_seconds'] ?? 86400),
+        'PIWIGO_SYNC_ENABLED=1',
+      );
+      if ($sourceMode !== 'legacy-view') $lines[] = 'ACCESS_USER='.escapeshellarg($accessUser);
+      if ($sourceMode === 'selected-fileids') $lines[] = 'ROOTS_CONFIG='.$rootsPath;
+      if ($fallbackAvailable)
+      {
+        $lines[] = 'PIWIGO_SYNC_USER='.$credentials['piwigo_user'];
+        $lines[] = 'PIWIGO_SYNC_PASSWORD_FILE='.$piwigoPasswordPath;
+      }
+      file_put_contents($configPath, implode("\n", $lines)."\n", LOCK_EX);
+      chmod($configPath, 0600);
+
+      $config['state_dir'] = $stateDir;
+      $config['status_file'] = $statusFile;
+      $config['runtime'] = array('mode'=>'shared-runner','config'=>$configPath,'reconciled_at'=>date('Y-m-d H:i:s'));
+      $json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+      if (!is_string($json)) fail_reconcile('Connector-Konfiguration konnte nicht serialisiert werden.');
+      $now = date('Y-m-d H:i:s');
+      $sql = "UPDATE `{$table}` SET enabled=1,takeover_state='active',config_json='".sql_reconcile($db,$json)."',secret_blob='".sql_reconcile($db,$row['secret_blob'])."',updated='".sql_reconcile($db,$now)."' WHERE id=".$id;
+      if (!$db->query($sql)) fail_reconcile('Runtime-Status konnte nicht gespeichert werden: '.$db->error);
+      if (!$isActive) echo "NC Connector: Verbindung #{$id} ({$row['name']}) automatisch in die gemeinsame Runtime uebernommen.\n";
+    }
+    catch (Throwable $e)
+    {
+      write_runtime_status($piwigoRoot, $id, $stateDir, $e->getMessage());
+      fwrite(STDERR, "NC Connector #{$id}: ".$e->getMessage()."\n");
+    }
+  }
+
+  exit(0);
+}
+catch (Throwable $e)
+{
+  fwrite(STDERR, "NC Connector Reconcile: ".$e->getMessage()."\n");
+  exit(1);
+}

runtime/run-all.sh

@@ -4,19 +4,238 @@ set -Eeuo pipefail
 CONFIG_DIR="/etc/bratonien-tools/nc-connector"
 SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
 shopt -s nullglob
-configs=("$CONFIG_DIR"/connection-*.conf)
 
-if [[ ${#configs[@]} -eq 0 ]]; then
+read_config_value() {
-    echo "Keine aktiven NC-Connector-Verbindungen konfiguriert."
+    local key="$1"
+    local file="$2"
+    local value
+    value="$(sed -n "s/^${key}=//p" "$file" | tail -n 1)"
+    value="${value%\"}"
+    value="${value#\"}"
+    value="${value%\'}"
+    value="${value#\'}"
+    printf '%s' "$value"
+}
+
+compact_text() {
+    printf '%s\n' "$1" | tail -n 20 | tr '\n' ' ' | sed 's/[[:space:]]\+/ /g; s/^[[:space:]]//; s/[[:space:]]$//'
+}
+
+read_webdav_failure_detail() {
+    local config="$1"
+    local captured_output="${2:-}"
+    local connection_id piwigo_root status_file status_detail
+
+    connection_id="$(read_config_value CONNECTION_ID "$config")"
+    piwigo_root="$(read_config_value PIWIGO_ROOT "$config")"
+    [[ -n "$piwigo_root" ]] || piwigo_root="/var/www/piwigo"
+
+    status_detail=""
+    if [[ -n "$connection_id" ]]; then
+        status_file="${piwigo_root%/}/_data/bratonien-tools/nc-connector-status/connection-${connection_id}.json"
+        if [[ -r "$status_file" ]]; then
+            status_detail="$(php -r '
+              $file = $argv[1];
+              $data = json_decode((string)@file_get_contents($file), true);
+              if (!is_array($data)) exit(0);
+              $message = trim((string)($data["message"] ?? ""));
+              $detail = trim((string)($data["error_detail"] ?? ""));
+              $parts = array();
+              if ($message !== "") $parts[] = $message;
+              if ($detail !== "") $parts[] = $detail;
+              if ($parts) {
+                $text = preg_replace("/\\s+/u", " ", implode(" - ", $parts));
+                echo trim((string)$text);
+              }
+            ' "$status_file")"
+        fi
+    fi
+
+    if [[ -n "$captured_output" ]]; then
+        captured_output="$(compact_text "$captured_output")"
+    fi
+
+    if [[ -n "$status_detail" && -n "$captured_output" ]]; then
+        printf '%s' "$status_detail | Prozessausgabe: $captured_output"
+    elif [[ -n "$status_detail" ]]; then
+        printf '%s' "$status_detail"
+    elif [[ -n "$captured_output" ]]; then
+        printf '%s' "$captured_output"
+    elif [[ -z "$connection_id" ]]; then
+        printf '%s' 'WebDAV-Prozess wurde gestartet, aber die Verbindungs-ID fehlt in der Runtime-Konfiguration.'
+    else
+        printf '%s' "WebDAV-Prozess fuer Verbindung ${connection_id} endete mit Fehler, lieferte aber weder Statusdatei noch Prozessausgabe."
+    fi
+}
+
+write_route_status() {
+    local route="$1"
+    local label="$2"
+    local detail="$3"
+    local fallback_used="$4"
+    local success="$5"
+
+    [[ -n "${ROUTE_STATUS_FILE:-}" ]] || return 0
+    mkdir -p -- "$(dirname -- "$ROUTE_STATUS_FILE")"
+
+    php -r '
+      $payload = array(
+        "timestamp" => time(),
+        "route" => (string)$argv[2],
+        "label" => (string)$argv[3],
+        "detail" => (string)$argv[4],
+        "fallback_used" => $argv[5] === "1",
+        "success" => $argv[6] === "1"
+      );
+      $json = json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT);
+      if (!is_string($json) || file_put_contents($argv[1], $json.PHP_EOL, LOCK_EX) === false) {
+        fwrite(STDERR, "Route-Status konnte nicht geschrieben werden.\n");
+        exit(1);
+      }
+      @chmod($argv[1], 0644);
+    ' "$ROUTE_STATUS_FILE" "$route" "$label" "$detail" "$fallback_used" "$success"
+}
+
+if ! php "$SCRIPT_DIR/reconcile.php"; then
+    echo "NC Connector: gespeicherte lokale Verbindungen konnten nicht mit der Runtime abgeglichen werden." >&2
+    exit 1
+fi
+
+if ! php "$SCRIPT_DIR/reconcile-webdav.php"; then
+    echo "NC Connector: WebDAV-Verbindungen konnten nicht mit der Runtime abgeglichen werden." >&2
+    exit 1
+fi
+
+if ! php "$SCRIPT_DIR/cleanup-webdav-piwigo.php"; then
+    echo "NC Connector: Piwigo-Inhalte geloeschter WebDAV-Verbindungen konnten nicht bereinigt werden." >&2
+    exit 1
+fi
+
+if ! php "$SCRIPT_DIR/cleanup-stale.php"; then
+    echo "NC Connector: verwaiste Laufzeitdateien konnten nicht bereinigt werden." >&2
+    exit 1
+fi
+
+configs=("$CONFIG_DIR"/connection-*.conf)
+webdav_configs=("$CONFIG_DIR"/webdav-connection-*.conf)
+
+if [[ ${#configs[@]} -eq 0 && ${#webdav_configs[@]} -eq 0 ]]; then
+    echo "Keine NC-Connector-Verbindungen konfiguriert."
     exit 0
 fi
 
-result=0
+route_piwigo_root=""
+for candidate in "${webdav_configs[@]}" "${configs[@]}"; do
+    [[ -f "$candidate" ]] || continue
+    route_piwigo_root="$(read_config_value PIWIGO_ROOT "$candidate")"
+    [[ -n "$route_piwigo_root" ]] && break
+done
+[[ -n "$route_piwigo_root" ]] || route_piwigo_root="/var/www/piwigo"
+ROUTE_STATUS_FILE="${route_piwigo_root%/}/_data/bratonien-tools/nc-connector-status/route-status.json"
+
+webdav_success=0
+webdav_failed=0
+webdav_failure_detail=""
+
+if [[ ${#webdav_configs[@]} -eq 0 ]]; then
+    webdav_failed=1
+    webdav_failure_detail="Keine WebDAV-Runtime-Verbindung ist konfiguriert. Es existiert aktuell nur die Legacy-Verbindung; deshalb kann WebDAV nicht primaer laufen."
+    echo "NC Connector: $webdav_failure_detail" >&2
+else
+    for config in "${webdav_configs[@]}"; do
+        name="$(basename "$config")"
+        echo "NC Connector WebDAV primaer: $name"
+        webdav_output=""
+        if webdav_output="$(env PIWIGO_CONFIG="$config" bash "$SCRIPT_DIR/sync-webdav.sh" 2>&1)"; then
+            webdav_success=1
+            [[ -z "$webdav_output" ]] || printf '%s\n' "$webdav_output"
+        else
+            webdav_exit=$?
+            webdav_failed=1
+            [[ -z "$webdav_output" ]] || printf '%s\n' "$webdav_output" >&2
+            webdav_failure_detail="$(read_webdav_failure_detail "$config" "$webdav_output")"
+            webdav_failure_detail="Exit-Code ${webdav_exit}: ${webdav_failure_detail}"
+            echo "NC Connector: WebDAV-Lauf fehlgeschlagen: $webdav_failure_detail" >&2
+            echo "NC Connector: Legacy-Fallback bleibt verfuegbar." >&2
+        fi
+    done
+fi
+
+if [[ "$webdav_success" -eq 1 ]]; then
+    write_route_status \
+        "webdav" \
+        "WebDAV (primaer)" \
+        "WebDAV erfolgreich. Legacy-Fallback wurde in diesem Lauf nicht ausgefuehrt." \
+        "0" \
+        "1"
+    echo "NC Connector: WebDAV erfolgreich; Legacy-Verbindung wird in diesem Lauf nicht ausgefuehrt."
+    exit 0
+fi
+
+if [[ ${#configs[@]} -eq 0 ]]; then
+    [[ -n "$webdav_failure_detail" ]] || webdav_failure_detail="WebDAV ist fehlgeschlagen; Ursache konnte nicht ermittelt werden."
+    write_route_status \
+        "failed" \
+        "FEHLER - kein Datenweg" \
+        "WebDAV-Fehler: $webdav_failure_detail Keine Legacy-Fallback-Verbindung vorhanden." \
+        "0" \
+        "0"
+    echo "NC Connector: WebDAV ist fehlgeschlagen und es ist keine Legacy-Fallback-Verbindung vorhanden." >&2
+    exit 1
+fi
+
+echo "NC Connector: kein erfolgreicher WebDAV-Lauf; Legacy-Fallback wird ausgefuehrt."
+legacy_result=0
+
 for config in "${configs[@]}"; do
-    echo "NC Connector: $(basename "$config")"
+    name="$(basename "$config")"
+    connection_id=""
+    if [[ "$name" =~ ^connection-([0-9]+)\.conf$ ]]; then
+        connection_id="${BASH_REMATCH[1]}"
+    fi
+
+    piwigo_root="$(read_config_value PIWIGO_ROOT "$config")"
+    [[ -n "$piwigo_root" ]] || piwigo_root="/var/www/piwigo"
+    tombstone_dir="${piwigo_root%/}/_data/bratonien-tools/nc-connector-status"
+
+    if [[ -n "$connection_id" && -f "$tombstone_dir/deleted-$connection_id" ]]; then
+        echo "NC Connector: Verbindung $connection_id wurde geloescht; Laufzeitdateien werden entfernt."
+        rm -f -- "$CONFIG_DIR/connection-$connection_id.conf" \
+            "$CONFIG_DIR/connection-$connection_id.db-password" \
+            "$CONFIG_DIR/connection-$connection_id.piwigo-password" \
+            "$CONFIG_DIR/connection-$connection_id.storages.tsv" \
+            "$CONFIG_DIR/connection-$connection_id.roots.tsv"
+        rm -f -- "$tombstone_dir/deleted-$connection_id"
+        continue
+    fi
+
+    echo "NC Connector Legacy-Fallback: $name"
     if ! env PIWIGO_CONFIG="$config" bash "$SCRIPT_DIR/sync.sh"; then
-        result=1
+        legacy_result=1
     fi
 done
 
-exit "$result"
+if [[ "$legacy_result" -eq 0 ]]; then
+    [[ -n "$webdav_failure_detail" ]] || webdav_failure_detail="WebDAV war nicht erfolgreich; Ursache konnte nicht ermittelt werden."
+    write_route_status \
+        "legacy_fallback" \
+        "LEGACY-FALLBACK AKTIV" \
+        "WebDAV-Fehler: $webdav_failure_detail Legacy-Fallback wurde erfolgreich ausgefuehrt." \
+        "1" \
+        "1"
+    echo "NC Connector: Legacy-Fallback erfolgreich."
+    exit 0
+fi
+
+[[ -n "$webdav_failure_detail" ]] || webdav_failure_detail="WebDAV war nicht erfolgreich; Ursache konnte nicht ermittelt werden."
+write_route_status \
+    "failed" \
+    "FEHLER - WebDAV und Fallback" \
+    "WebDAV-Fehler: $webdav_failure_detail Legacy-Fallback ist ebenfalls fehlgeschlagen." \
+    "1" \
+    "0"
+
+if [[ "$webdav_failed" -eq 1 ]]; then
+    echo "NC Connector: WebDAV und Legacy-Fallback sind fehlgeschlagen." >&2
+fi
+exit 1

runtime/sync-webdav.sh

@@ -0,0 +1,205 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+CONFIG_FILE="${PIWIGO_CONFIG:-}"
+[[ -n "$CONFIG_FILE" && -r "$CONFIG_FILE" ]] || { echo "WebDAV-Konfiguration fehlt: ${CONFIG_FILE:-<leer>}" >&2; exit 1; }
+
+# shellcheck source=/dev/null
+source "$CONFIG_FILE"
+
+: "${PIWIGO_ROOT:?PIWIGO_ROOT fehlt}"
+: "${CONNECTION_ID:?CONNECTION_ID fehlt}"
+: "${WEBDAV_BASE_URL:?WEBDAV_BASE_URL fehlt}"
+: "${WEBDAV_USER:?WEBDAV_USER fehlt}"
+: "${WEBDAV_PASSWORD_FILE:?WEBDAV_PASSWORD_FILE fehlt}"
+: "${WEBDAV_ROOTS_FILE:?WEBDAV_ROOTS_FILE fehlt}"
+: "${WEBDAV_SOURCE_DIR:?WEBDAV_SOURCE_DIR fehlt}"
+: "${WEBDAV_MAPPING_FILE:?WEBDAV_MAPPING_FILE fehlt}"
+: "${MANIFEST:?MANIFEST fehlt}"
+: "${SHADOW_MAP_FILE:?SHADOW_MAP_FILE fehlt}"
+: "${GALLERY_ROOT:?GALLERY_ROOT fehlt}"
+: "${STATE_DIR:?STATE_DIR fehlt}"
+: "${STATUS_FILE:?STATUS_FILE fehlt}"
+
+[[ "${SOURCE_MODE:-}" == "webdav-placeholder" ]] || { echo "Falscher SOURCE_MODE: ${SOURCE_MODE:-<leer>}" >&2; exit 1; }
+[[ -r "$WEBDAV_PASSWORD_FILE" ]] || { echo "Nextcloud-Passwortdatei fehlt." >&2; exit 1; }
+[[ -r "$WEBDAV_ROOTS_FILE" ]] || { echo "WebDAV-Wurzeln fehlen." >&2; exit 1; }
+
+SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+LOCK_FILE="$STATE_DIR/webdav-sync.lock"
+mkdir -p -- "$STATE_DIR"
+exec 9>"$LOCK_FILE"
+flock -n 9 || exit 0
+
+write_status() {
+    local state="$1" message="$2" detail="${3:-}" auth_mode="${4:-webdav}" api_state="${5:-not_run}" api_message="${6:-}" fallback_state="${7:-not_run}" fallback_message="${8:-}"
+    python3 - "$STATUS_FILE" "$PIWIGO_ROOT" "$CONNECTION_ID" "$state" "$message" "$detail" "$auth_mode" "$api_state" "$api_message" "$fallback_state" "$fallback_message" <<'PY'
+import json, os, sys, tempfile, time
+(status_file, piwigo_root, connection_id, state, message, detail, auth_mode,
+ api_state, api_message, fallback_state, fallback_message) = sys.argv[1:]
+payload = {
+    "state": state,
+    "message": message,
+    "timestamp": int(time.time()),
+    "auth_mode": auth_mode,
+    "api": {"state": api_state, "message": api_message},
+    "fallback": {"state": fallback_state, "message": fallback_message},
+    "error_detail": detail if state == "error" else "",
+}
+public_file = os.path.join(piwigo_root.rstrip('/'), '_data', 'bratonien-tools', 'nc-connector-status', f'connection-{connection_id}.json')
+for target in (status_file, public_file):
+    directory = os.path.dirname(target)
+    os.makedirs(directory, exist_ok=True)
+    fd, temporary = tempfile.mkstemp(dir=directory)
+    with os.fdopen(fd, 'w', encoding='utf-8') as handle:
+        json.dump(payload, handle, ensure_ascii=False)
+        handle.write('\n')
+    os.chmod(temporary, 0o644)
+    os.replace(temporary, target)
+PY
+}
+
+compact_output() {
+    tail -n 12 | tr '\n' ' ' | sed 's/[[:space:]]\+/ /g; s/^[[:space:]]//; s/[[:space:]]$//'
+}
+
+failure() {
+    local code="$1" command="$2" line="$3"
+    trap - ERR
+    write_status error "WebDAV-Shadow-Tree fehlgeschlagen" "Exit-Code: $code; Zeile: $line; Befehl: $command"
+    exit "$code"
+}
+trap 'failure $? "$BASH_COMMAND" "$LINENO"' ERR
+
+ROOT_ARGS=()
+while IFS=$'\t' read -r path display_name; do
+    [[ -z "$path" || "$path" == \#* ]] && continue
+    ROOT_ARGS+=(--root "$path")
+done < "$WEBDAV_ROOTS_FILE"
+
+[[ ${#ROOT_ARGS[@]} -gt 0 ]] || { write_status error "Keine WebDAV-Wurzeln konfiguriert"; exit 1; }
+
+python3 "$SCRIPT_DIR/lib/build_webdav_placeholder_source.py" \
+    --base-url "$WEBDAV_BASE_URL" \
+    --user "$WEBDAV_USER" \
+    --password-file "$WEBDAV_PASSWORD_FILE" \
+    "${ROOT_ARGS[@]}" \
+    --source-dir "$WEBDAV_SOURCE_DIR" \
+    --manifest "$MANIFEST" \
+    --mapping "$WEBDAV_MAPPING_FILE"
+
+python3 "$SCRIPT_DIR/lib/shadow_tree.py" \
+    --manifest "$MANIFEST" \
+    --destination "$GALLERY_ROOT" \
+    --state "$SHADOW_MAP_FILE"
+
+trap - ERR
+PREVIEW_CACHE="$PIWIGO_ROOT/_data/bratonien-tools/nc-webdav-preview/connection-$CONNECTION_ID"
+PREVIEW_OUTPUT=""
+PREVIEW_EXIT=0
+if PREVIEW_OUTPUT="$(php "$SCRIPT_DIR/lib/precache-webdav-previews.php" \
+    --mapping="$WEBDAV_MAPPING_FILE" \
+    --base-url="$WEBDAV_BASE_URL" \
+    --user="$WEBDAV_USER" \
+    --password-file="$WEBDAV_PASSWORD_FILE" \
+    --cache-dir="$PREVIEW_CACHE" 2>&1)"; then
+    PREVIEW_EXIT=0
+else
+    PREVIEW_EXIT=$?
+fi
+[[ -z "$PREVIEW_OUTPUT" ]] || printf '%s\n' "$PREVIEW_OUTPUT"
+if [[ "$PREVIEW_EXIT" -ne 0 ]]; then
+    DETAIL="Exit-Code: $PREVIEW_EXIT"
+    if [[ -n "$PREVIEW_OUTPUT" ]]; then
+        DETAIL+="; Ausgabe: $(printf '%s\n' "$PREVIEW_OUTPUT" | compact_output)"
+    fi
+    write_status error "WebDAV-Vorschaubilder konnten beim Einlesen nicht erzeugt werden" "$DETAIL"
+    exit "$PREVIEW_EXIT"
+fi
+
+if [[ "${PIWIGO_SYNC_ENABLED:-0}" == "1" ]]; then
+    PIWIGO_OUTPUT=""
+    PIWIGO_EXIT=0
+    if PIWIGO_OUTPUT="$(php "$SCRIPT_DIR/lib/piwigo-sync.php" \
+        --piwigo-root="$PIWIGO_ROOT" \
+        --connection-id="$CONNECTION_ID" \
+        --base-url="http://127.0.0.1" 2>&1)"; then
+        PIWIGO_EXIT=0
+    else
+        PIWIGO_EXIT=$?
+    fi
+    [[ -z "$PIWIGO_OUTPUT" ]] || printf '%s\n' "$PIWIGO_OUTPUT"
+
+    if [[ "$PIWIGO_EXIT" -ne 0 ]]; then
+        DETAIL="Exit-Code: $PIWIGO_EXIT"
+        if [[ -n "$PIWIGO_OUTPUT" ]]; then
+            DETAIL+="; Ausgabe: $(printf '%s\n' "$PIWIGO_OUTPUT" | compact_output)"
+        fi
+
+        if grep -qi 'Invalid username/password' <<<"$PIWIGO_OUTPUT"; then
+            write_status error \
+                "Piwigo-Fallback fehlgeschlagen: Benutzername oder Passwort ist ungültig" \
+                "$DETAIL" \
+                "fallback" \
+                "not_configured" \
+                "Für diese Verbindung ist keine nutzbare API konfiguriert" \
+                "error" \
+                "Piwigo hat Benutzername oder Passwort des Fallback-Zugangs abgelehnt"
+        elif grep -qi 'Kein gespeicherter Benutzername/Passwort-Fallback\|Kein verbindungseigener Piwigo-Zugang' <<<"$PIWIGO_OUTPUT"; then
+            write_status error \
+                "Piwigo-Zugang fehlt: API und Fallback sind nicht nutzbar" \
+                "$DETAIL" \
+                "failed" \
+                "not_configured" \
+                "Für diese Verbindung ist keine nutzbare API konfiguriert" \
+                "not_configured" \
+                "Kein vollständiger Fallback-Zugang gespeichert"
+        else
+            write_status error "Piwigo-Synchronisierung des WebDAV-Shadow-Trees fehlgeschlagen" "$DETAIL"
+        fi
+        exit "$PIWIGO_EXIT"
+    fi
+
+    DERIVATIVE_OUTPUT=""
+    DERIVATIVE_EXIT=0
+    if DERIVATIVE_OUTPUT="$(php "$SCRIPT_DIR/lib/build-webdav-derivatives.php" \
+        --piwigo-root="$PIWIGO_ROOT" \
+        --connection-id="$CONNECTION_ID" 2>&1)"; then
+        DERIVATIVE_EXIT=0
+    else
+        DERIVATIVE_EXIT=$?
+    fi
+    [[ -z "$DERIVATIVE_OUTPUT" ]] || printf '%s\n' "$DERIVATIVE_OUTPUT"
+    if [[ "$DERIVATIVE_EXIT" -ne 0 ]]; then
+        DETAIL="Exit-Code: $DERIVATIVE_EXIT"
+        if [[ -n "$DERIVATIVE_OUTPUT" ]]; then
+            DETAIL+="; Ausgabe: $(printf '%s\n' "$DERIVATIVE_OUTPUT" | compact_output)"
+        fi
+        write_status error "Piwigo-Derivate für WebDAV-Bilder konnten nicht erzeugt werden" "$DETAIL"
+        exit "$DERIVATIVE_EXIT"
+    fi
+
+    if grep -q 'Piwigo-Synchronisierung per API erfolgreich' <<<"$PIWIGO_OUTPUT"; then
+        write_status ok \
+            "WebDAV eingelesen, Piwigo synchronisiert und Derivate erzeugt" \
+            "" \
+            "api" \
+            "ok" \
+            "Piwigo-API erfolgreich" \
+            "not_needed" \
+            "Fallback wurde nicht benötigt"
+    elif grep -q 'Piwigo-Datenbanksynchronisierung per Benutzername/Passwort-Fallback erfolgreich' <<<"$PIWIGO_OUTPUT"; then
+        write_status ok \
+            "WebDAV eingelesen, Piwigo über Fallback synchronisiert und Derivate erzeugt" \
+            "" \
+            "fallback" \
+            "not_used" \
+            "API war nicht nutzbar" \
+            "ok" \
+            "Benutzername/Passwort-Fallback erfolgreich"
+    else
+        write_status ok "WebDAV eingelesen, Piwigo synchronisiert und Derivate erzeugt"
+    fi
+else
+    write_status ok "WebDAV eingelesen und Vorschaubilder erzeugt; Registrierung erfolgt über den bestehenden produktiven Piwigo-Sync"
+fi

runtime/sync.sh

@@ -5,12 +5,27 @@ CONFIG_FILE="${PIWIGO_CONFIG:-/etc/bratonien-tools/nc-connector/connection-1.con
 [[ -r "$CONFIG_FILE" ]] || { echo "Konfiguration fehlt: $CONFIG_FILE" >&2; exit 1; }
 
 PIWIGO_SYNC_OVERRIDE_VALUE="${PIWIGO_SYNC_OVERRIDE-}"
-
 # shellcheck source=/dev/null
 source "$CONFIG_FILE"
 
-NC_ACTIVITY_VIEW="${NC_ACTIVITY_VIEW:-piwigo_showcase_activity}"
+: "${NC_ACTIVITY_VIEW:?NC_ACTIVITY_VIEW fehlt}"
-NC_DB_VIEW="${NC_DB_VIEW:-piwigo_showcase_sources}"
+: "${NC_DB_VIEW:?NC_DB_VIEW fehlt}"
+SOURCE_MODE="${SOURCE_MODE:-legacy-view}"
+ACCESS_USER="${ACCESS_USER:-}"
+ROOTS_CONFIG="${ROOTS_CONFIG:-}"
+
+case "$SOURCE_MODE" in
+    legacy-view|user-shares|selected-fileids) ;;
+    *) echo "Unbekannter SOURCE_MODE: $SOURCE_MODE" >&2; exit 1 ;;
+esac
+if [[ "$SOURCE_MODE" != "legacy-view" && -z "$ACCESS_USER" ]]; then
+    echo "ACCESS_USER fehlt fuer die verbindungsbezogene Datenquelle." >&2
+    exit 1
+fi
+if [[ "$SOURCE_MODE" == "selected-fileids" && ( -z "$ROOTS_CONFIG" || ! -r "$ROOTS_CONFIG" ) ]]; then
+    echo "ROOTS_CONFIG fehlt fuer die ausgewaehlten Nextcloud-Quellen." >&2
+    exit 1
+fi
 
 if [[ -n "$PIWIGO_SYNC_OVERRIDE_VALUE" ]]; then
     case "$PIWIGO_SYNC_OVERRIDE_VALUE" in
@@ -50,13 +65,17 @@ API_MESSAGE=""
 FALLBACK_STATE="not_run"
 FALLBACK_MESSAGE=""
 ERROR_DETAIL=""
+ERROR_STAGE="Vorbereitung"
+ERROR_MESSAGE="Synchronisierung fehlgeschlagen"
+
+compact_output() {
+    tail -n 8 | tr '\n' ' ' | sed 's/[[:space:]]\+/ /g; s/^[[:space:]]//; s/[[:space:]]$//'
+}
 
 write_status() {
     local state="$1" message="$2"
     local error_detail="$ERROR_DETAIL"
-    if [[ "$state" != "error" ]]; then
+    [[ "$state" == "error" ]] || error_detail=""
-        error_detail=""
-    fi
     python3 - "$STATUS_FILE" "$PUBLIC_STATUS_FILE" "$state" "$message" "$AUTH_MODE" "$API_STATE" "$API_MESSAGE" "$FALLBACK_STATE" "$FALLBACK_MESSAGE" "$error_detail" <<'PY'
 import json, os, sys, tempfile, time
 (path, public_path, state, message, auth_mode, api_state, api_message,
@@ -86,27 +105,48 @@ PY
 }
 
 failure() {
-    [[ -n "$ERROR_DETAIL" ]] || ERROR_DETAIL="Synchronisierung wurde durch einen technischen Fehler abgebrochen."
+    local exit_code="${1:-1}"
-    write_status error "Synchronisierung fehlgeschlagen"
+    local failed_command="${2:-unbekannt}"
+    local failed_line="${3:-?}"
+    trap - ERR
+    if [[ -z "$ERROR_DETAIL" ]]; then
+        ERROR_DETAIL="Schritt: $ERROR_STAGE. Exit-Code: $exit_code. Zeile: $failed_line. Fehlgeschlagener Befehl: $failed_command"
+    fi
+    write_status error "$ERROR_MESSAGE"
+    exit "$exit_code"
 }
-trap failure ERR
+trap 'failure $? "$BASH_COMMAND" "$LINENO"' ERR
 
+run_stage() {
+    local stage="$1" message="$2"
+    shift 2
+    local output="" exit_code=0
+    ERROR_STAGE="$stage"
+    ERROR_MESSAGE="$message"
+    if output="$("$@" 2>&1)"; then exit_code=0; else exit_code=$?; fi
+    [[ -z "$output" ]] || printf '%s\n' "$output"
+    if [[ "$exit_code" -ne 0 ]]; then
+        ERROR_DETAIL="Schritt: $stage. Exit-Code: $exit_code."
+        [[ -z "$output" ]] || ERROR_DETAIL+=" Ausgabe: $(printf '%s\n' "$output" | compact_output)"
+        trap - ERR
+        write_status error "$message"
+        exit "$exit_code"
+    fi
+}
+
+ERROR_STAGE="Lokalen Zustand prüfen"
+ERROR_MESSAGE="Lokaler Connector-Zustand konnte nicht geprüft werden"
 NEEDS_LOCAL_REPAIR=0
 if [[ ! -s "$MAP_FILE" ]]; then
     NEEDS_LOCAL_REPAIR=1
 else
     set +e
     python3 - "$MAP_FILE" "$GALLERY_ROOT" <<'PY'
-import json
+import json, sys
-import sys
 from pathlib import Path
-
 mapping = json.loads(Path(sys.argv[1]).read_text(encoding="utf-8"))
 gallery = Path(sys.argv[2])
-roots = [
+roots = [target for source, target in mapping.items() if source.startswith("share:") and "/" not in source]
-    target for source, target in mapping.items()
-    if source.startswith("share:") and "/" not in source
-]
 raise SystemExit(0 if roots and all((gallery / target).is_dir() for target in roots) else 1)
 PY
     ROOTS_INTACT=$?
@@ -122,90 +162,109 @@ if [[ "$NEEDS_LOCAL_REPAIR" == "0" && "${PIWIGO_SYNC_ENABLED:-0}" == "1" ]]; the
     [[ "$PIWIGO_ALBUMS_INTACT" == "0" ]] || NEEDS_LOCAL_REPAIR=1
 fi
 
+GATE_ARGS=(
+    --state "$ACTIVITY_STATE" --host "$NC_DB_HOST" --port "$NC_DB_PORT"
+    --database "$NC_DB_NAME" --user "$NC_DB_USER" --password-file "$NC_DB_PASSWORD_FILE"
+    --view "$NC_ACTIVITY_VIEW" --source-view "$NC_DB_VIEW"
+    --quiet "$QUIET_SECONDS" --max-wait "$MAX_WAIT_SECONDS" --full-after "$FULL_SYNC_SECONDS"
+)
+if [[ "$SOURCE_MODE" != "legacy-view" ]]; then GATE_ARGS+=(--access-user "$ACCESS_USER"); fi
+if [[ "$SOURCE_MODE" == "selected-fileids" ]]; then GATE_ARGS+=(--roots-config "$ROOTS_CONFIG"); fi
+
 if [[ "$NEEDS_LOCAL_REPAIR" == "1" ]]; then
     GATE_RESULT=0
 else
-    if python3 "$SCRIPT_DIR/lib/activity_gate.py" check \
+    ERROR_STAGE="Nextcloud-Aktivitaet pruefen"
-        --state "$ACTIVITY_STATE" --host "$NC_DB_HOST" --port "$NC_DB_PORT" \
+    ERROR_MESSAGE="Nextcloud-Aktivitaet konnte nicht geprueft werden"
-        --database "$NC_DB_NAME" --user "$NC_DB_USER" --password-file "$NC_DB_PASSWORD_FILE" \
+    if GATE_OUTPUT="$(python3 "$SCRIPT_DIR/lib/activity_gate.py" check "${GATE_ARGS[@]}" 2>&1)"; then GATE_RESULT=0; else GATE_RESULT=$?; fi
-        --view "$NC_ACTIVITY_VIEW" --source-view "$NC_DB_VIEW" \
+    [[ -z "$GATE_OUTPUT" ]] || printf '%s\n' "$GATE_OUTPUT"
-        --quiet "$QUIET_SECONDS" --max-wait "$MAX_WAIT_SECONDS" --full-after "$FULL_SYNC_SECONDS"; then
-        GATE_RESULT=0
-    else
-        GATE_RESULT=$?
-    fi
 fi
 
 if [[ "$GATE_RESULT" == "3" ]]; then
     trap - ERR
-    write_status ok "Keine Änderungen gefunden"
+    write_status ok "Keine Aenderungen gefunden"
     exit 0
 fi
-[[ "$GATE_RESULT" == "0" ]] || { ERROR_DETAIL="Activity-Gate fehlgeschlagen (Exit-Code $GATE_RESULT)."; exit "$GATE_RESULT"; }
+if [[ "$GATE_RESULT" != "0" ]]; then
+    ERROR_DETAIL="Schritt: Nextcloud-Aktivitaet pruefen. Exit-Code: $GATE_RESULT."
+    [[ -z "${GATE_OUTPUT:-}" ]] || ERROR_DETAIL+=" Ausgabe: $(printf '%s\n' "$GATE_OUTPUT" | compact_output)"
+    trap - ERR
+    write_status error "Nextcloud-Aktivitaet konnte nicht geprueft werden"
+    exit "$GATE_RESULT"
+fi
 
-python3 "$SCRIPT_DIR/lib/build_manifest.py" \
+if [[ "$SOURCE_MODE" == "selected-fileids" ]]; then
+    run_stage "Ausgewaehlte Nextcloud-Quellen aufloesen" "Ausgewaehlte Nextcloud-Quellen konnten nicht aufgeloest werden" \
+        python3 "$SCRIPT_DIR/lib/build_selected_manifest.py" \
         --host "$NC_DB_HOST" --port "$NC_DB_PORT" --database "$NC_DB_NAME" --user "$NC_DB_USER" \
         --password-file "$NC_DB_PASSWORD_FILE" --view "$NC_DB_VIEW" \
+        --storage-config "$STORAGE_CONFIG" --roots-config "$ROOTS_CONFIG" --output "$MANIFEST"
+else
+    MANIFEST_ARGS=(
+        --host "$NC_DB_HOST" --port "$NC_DB_PORT" --database "$NC_DB_NAME" --user "$NC_DB_USER"
+        --password-file "$NC_DB_PASSWORD_FILE" --view "$NC_DB_VIEW"
         --storage-config "$STORAGE_CONFIG" --output "$MANIFEST"
+    )
+    if [[ "$SOURCE_MODE" == "user-shares" ]]; then MANIFEST_ARGS+=(--access-user "$ACCESS_USER"); fi
+    run_stage "Nextcloud-Dateiliste lesen" "Dateiliste aus Nextcloud konnte nicht erstellt werden" \
+        python3 "$SCRIPT_DIR/lib/build_manifest.py" "${MANIFEST_ARGS[@]}"
+fi
 
-python3 "$SCRIPT_DIR/lib/shadow_tree.py" \
+run_stage "Lokalen Galeriebaum aktualisieren" "Lokaler Galeriebaum konnte nicht aktualisiert werden" \
-    --manifest "$MANIFEST" --destination "$GALLERY_ROOT" --state "$MAP_FILE"
+    python3 "$SCRIPT_DIR/lib/shadow_tree.py" --manifest "$MANIFEST" --destination "$GALLERY_ROOT" --state "$MAP_FILE"
 
 if [[ "${PIWIGO_SYNC_ENABLED:-0}" == "1" ]]; then
-    set +e
+    ERROR_STAGE="Piwigo synchronisieren"
-    PIWIGO_OUTPUT="$(php "$SCRIPT_DIR/lib/piwigo-sync.php" \
+    ERROR_MESSAGE="Piwigo-Synchronisierung fehlgeschlagen"
-        --piwigo-root="$PIWIGO_ROOT" \
+    if PIWIGO_OUTPUT="$(php "$SCRIPT_DIR/lib/piwigo-sync.php" --piwigo-root="$PIWIGO_ROOT" --connection-id="$CONNECTION_ID" --base-url="http://127.0.0.1" 2>&1)"; then PIWIGO_EXIT=0; else PIWIGO_EXIT=$?; fi
-        --connection-id="$CONNECTION_ID" \
-        --base-url="http://127.0.0.1" 2>&1)"
-    PIWIGO_EXIT=$?
-    set -e
     printf '%s\n' "$PIWIGO_OUTPUT"
 
     if grep -q 'Piwigo-Synchronisierung per API erfolgreich' <<<"$PIWIGO_OUTPUT"; then
-        AUTH_MODE="api"
+        AUTH_MODE="api"; API_STATE="ok"; API_MESSAGE="API-Synchronisierung erfolgreich"
-        API_STATE="ok"
+        FALLBACK_STATE="not_needed"; FALLBACK_MESSAGE="Fallback wurde nicht benoetigt"
-        API_MESSAGE="API-Synchronisierung erfolgreich"
-        FALLBACK_STATE="not_needed"
-        FALLBACK_MESSAGE="Fallback wurde nicht benötigt"
     else
         API_LINE="$(grep -m1 '^Piwigo-API nicht nutzbar:' <<<"$PIWIGO_OUTPUT" || true)"
-        if [[ -n "$API_LINE" ]]; then
         API_STATE="error"
-            API_MESSAGE="${API_LINE#Piwigo-API nicht nutzbar: }"
+        if [[ -n "$API_LINE" ]]; then API_MESSAGE="${API_LINE#Piwigo-API nicht nutzbar: }"; else API_MESSAGE="API-Synchronisierung war nicht erfolgreich"; fi
-        else
-            API_STATE="error"
-            API_MESSAGE="API-Synchronisierung war nicht erfolgreich"
-        fi
-
         if grep -q 'Piwigo-Datenbanksynchronisierung per Benutzername/Passwort-Fallback erfolgreich' <<<"$PIWIGO_OUTPUT"; then
-            AUTH_MODE="fallback"
+            AUTH_MODE="fallback"; FALLBACK_STATE="ok"; FALLBACK_MESSAGE="Benutzername/Passwort-Fallback erfolgreich"
-            FALLBACK_STATE="ok"
-            FALLBACK_MESSAGE="Benutzername/Passwort-Fallback erfolgreich"
         elif [[ "$PIWIGO_EXIT" -ne 0 ]]; then
-            AUTH_MODE="failed"
+            AUTH_MODE="failed"; FALLBACK_STATE="error"; FALLBACK_MESSAGE="$(tail -n 1 <<<"$PIWIGO_OUTPUT")"
-            FALLBACK_STATE="error"
-            FALLBACK_MESSAGE="$(tail -n 1 <<<"$PIWIGO_OUTPUT")"
         fi
     fi
-
     if [[ "$PIWIGO_EXIT" -ne 0 ]]; then
-        ERROR_DETAIL="$(tail -n 3 <<<"$PIWIGO_OUTPUT" | tr '\n' ' ' | sed 's/[[:space:]]\+/ /g; s/[[:space:]]$//')"
+        ERROR_DETAIL="Schritt: Piwigo synchronisieren. Exit-Code: $PIWIGO_EXIT. Ausgabe: $(printf '%s\n' "$PIWIGO_OUTPUT" | compact_output)"
         trap - ERR
-        write_status error "Synchronisierung fehlgeschlagen"
+        write_status error "Piwigo-Synchronisierung fehlgeschlagen"
         exit "$PIWIGO_EXIT"
     fi
 fi
 
-python3 "$SCRIPT_DIR/lib/activity_gate.py" commit \
+COMMIT_ARGS=(
-    --state "$ACTIVITY_STATE" --host "$NC_DB_HOST" --port "$NC_DB_PORT" \
+    --state "$ACTIVITY_STATE" --host "$NC_DB_HOST" --port "$NC_DB_PORT"
-    --database "$NC_DB_NAME" --user "$NC_DB_USER" --password-file "$NC_DB_PASSWORD_FILE" \
+    --database "$NC_DB_NAME" --user "$NC_DB_USER" --password-file "$NC_DB_PASSWORD_FILE"
     --view "$NC_ACTIVITY_VIEW" --source-view "$NC_DB_VIEW"
+)
+if [[ "$SOURCE_MODE" != "legacy-view" ]]; then COMMIT_ARGS+=(--access-user "$ACCESS_USER"); fi
+if [[ "$SOURCE_MODE" == "selected-fileids" ]]; then COMMIT_ARGS+=(--roots-config "$ROOTS_CONFIG"); fi
+
+ERROR_STAGE="Aktivitaetsstand speichern"
+ERROR_MESSAGE="Aktivitaetsstand konnte nicht gespeichert werden"
+if COMMIT_OUTPUT="$(python3 "$SCRIPT_DIR/lib/activity_gate.py" commit "${COMMIT_ARGS[@]}" 2>&1)"; then COMMIT_EXIT=0; else COMMIT_EXIT=$?; fi
+[[ -z "$COMMIT_OUTPUT" ]] || printf '%s\n' "$COMMIT_OUTPUT"
+if [[ "$COMMIT_EXIT" -ne 0 ]]; then
+    ERROR_DETAIL="Schritt: Aktivitaetsstand speichern. Exit-Code: $COMMIT_EXIT."
+    [[ -z "$COMMIT_OUTPUT" ]] || ERROR_DETAIL+=" Ausgabe: $(printf '%s\n' "$COMMIT_OUTPUT" | compact_output)"
+    trap - ERR
+    write_status error "Aktivitaetsstand konnte nicht gespeichert werden"
+    exit "$COMMIT_EXIT"
+fi
 
 trap - ERR
 if [[ "$AUTH_MODE" == "fallback" ]]; then
-    write_status warning "Synchronisierung erfolgreich über Fallback; API war nicht nutzbar"
+    write_status warning "Synchronisierung erfolgreich ueber Fallback; API war nicht nutzbar"
 elif [[ "$AUTH_MODE" == "api" ]]; then
-    write_status ok "Synchronisierung erfolgreich über API"
+    write_status ok "Synchronisierung erfolgreich ueber API"
 else
     write_status ok "Synchronisierung erfolgreich"
 fi

template/admin_tabs.tpl

@@ -9,7 +9,13 @@
 .bratonien-tab-panel { width:100%; max-width:none; margin-left:0 !important; margin-right:0 !important; }
 .bratonien-tab-panel[hidden] { display:none !important; }
 .bratonien-card { margin-left:0; margin-right:0; }
-@media (max-width:760px) { .bratonien-tabs{gap:5px}.bratonien-tab{border-bottom:1px solid rgba(255,255,255,.16);border-radius:4px;margin-bottom:0;padding:9px 11px} }
+.bratonien-edit-dialog { width:min(920px,calc(100vw - 3rem)); max-height:88vh; overflow:auto; background:#444; color:inherit; border:1px solid #777; border-radius:4px; padding:0; box-shadow:0 18px 60px rgba(0,0,0,.55); }
+.bratonien-edit-dialog::backdrop { background:rgba(0,0,0,.55); }
+.bratonien-edit-dialog__body { padding:1.25rem 1.5rem; }
+.bratonien-storage-row { display:grid; grid-template-columns:minmax(120px,.7fr) minmax(150px,1fr) minmax(240px,1.5fr) auto; gap:.5rem; align-items:end; margin:.5rem 0; }
+.bratonien-storage-row label { display:flex; flex-direction:column; gap:.25rem; }
+.bratonien-storage-row input { width:100%; box-sizing:border-box; }
+@media (max-width:760px) { .bratonien-tabs{gap:5px}.bratonien-tab{border-bottom:1px solid rgba(255,255,255,.16);border-radius:4px;margin-bottom:0;padding:9px 11px}.bratonien-storage-row{grid-template-columns:1fr} }
 </style>
 <div id="bratonien-tabs-anchor"></div>
 <script>
@@ -42,9 +48,172 @@
     var initial='',hash=location.hash?location.hash.slice(1):'';panels.forEach(function(item){if(item.definition.id===hash||(item.definition.sections||[]).indexOf(hash)!==-1)initial=item.definition.id;});if(!initial){try{initial=localStorage.getItem('bratonien-tools-active-tab')||'';}catch(e){}}if(!panels.some(function(i){return i.definition.id===initial;}))initial=panels[0].definition.id;activate(initial,false);
   }
 
+  function initNCWizardLifecycle(){
+    var section=document.getElementById('nc-connector');if(!section)return;
+    var dialog=document.getElementById('bratonien-nc-wizard-dialog');
+    var openButton=document.getElementById('bratonien-nc-wizard-open');
+    var closeButton=document.getElementById('bratonien-nc-wizard-close');
+    var storageKey='bratonienNcWizardOpen';
+    var modeKey='bratonienNcWizardMode';
+    var resetBusy=false;
+
+    function token(){var input=section.querySelector('input[name="pwg_token"]');return input?input.value:'';}
+    function setOpen(value){try{if(value)sessionStorage.setItem(storageKey,'1');else sessionStorage.removeItem(storageKey);}catch(e){}}
+    function mode(){try{return sessionStorage.getItem(modeKey)||'';}catch(e){return '';}}
+    function clearMode(){try{sessionStorage.removeItem(modeKey);}catch(e){}}
+    function applyMode(){
+      if(!dialog)return;
+      var current=mode();
+      var heading=dialog.querySelector('h4');
+      var finish=dialog.querySelector('button[value="nc_connector_wizard_finish"]');
+      if(current==='edit'){
+        if(heading)heading.textContent='Verbindung bearbeiten';
+        if(finish)finish.textContent='Änderungen speichern';
+      }else if(current==='migrate'){
+        if(heading)heading.textContent='Auf WebDAV migrieren';
+        if(finish)finish.textContent='Migration starten';
+      }else{
+        if(heading)heading.textContent='Neue Verbindung';
+        if(finish)finish.textContent='Verbindung anlegen';
+      }
+    }
+    function showWizard(){
+      setOpen(true);applyMode();
+      if(!dialog)return;
+      if(typeof dialog.showModal==='function'&&!dialog.open)dialog.showModal();
+      else dialog.setAttribute('open','open');
+    }
+    function resetServer(){
+      var pwgToken=token();
+      if(!pwgToken)return Promise.reject(new Error('CSRF token missing'));
+      var body=new URLSearchParams();body.set('pwg_token',pwgToken);body.set('bratonien_tool','nc_connector_wizard_reset');
+      return fetch(window.location.href,{method:'POST',credentials:'same-origin',cache:'no-store',headers:{'Content-Type':'application/x-www-form-urlencoded;charset=UTF-8'},body:body.toString()});
+    }
+    function closeAfterReset(){
+      if(resetBusy)return;resetBusy=true;setOpen(false);clearMode();
+      resetServer().catch(function(){}).finally(function(){resetBusy=false;if(dialog){if(typeof dialog.close==='function'&&dialog.open)dialog.close();else dialog.removeAttribute('open');}});
+    }
+
+    if(openButton){
+      openButton.addEventListener('click',function(event){
+        event.preventDefault();event.stopImmediatePropagation();clearMode();showWizard();
+      },true);
+    }
+    if(closeButton){
+      closeButton.addEventListener('click',function(event){event.preventDefault();event.stopImmediatePropagation();closeAfterReset();},true);
+    }
+    if(dialog){
+      dialog.addEventListener('cancel',function(event){event.preventDefault();event.stopImmediatePropagation();closeAfterReset();},true);
+      dialog.addEventListener('click',function(event){if(event.target===dialog){event.preventDefault();event.stopImmediatePropagation();closeAfterReset();}},true);
+      [].slice.call(dialog.querySelectorAll('form[data-bratonien-wizard-form]')).forEach(function(form){
+        form.addEventListener('submit',function(event){
+          var submitter=event.submitter;
+          setOpen(true);
+          if(submitter&&submitter.hasAttribute('data-bratonien-wizard-end')){
+            setOpen(false);
+            if(submitter.value==='nc_connector_wizard_reset')clearMode();
+          }
+        },true);
+      });
+      try{if(sessionStorage.getItem(storageKey)==='1')showWizard();}catch(e){}
+      applyMode();
+    }
+  }
+
+  function initNCConnectionEditing(){
+    var section=document.getElementById('nc-connector');if(!section)return;
+    var modeKey='bratonienNcWizardMode';
+    var pwgTokenInput=section.querySelector('input[name="pwg_token"]');
+    var pwgToken=pwgTokenInput?pwgTokenInput.value:'';
+
+    function setMode(value){try{sessionStorage.setItem(modeKey,value);}catch(e){}}
+    function makePostButton(label,tool,id,modeValue){
+      var form=document.createElement('form');form.method='post';form.style.display='inline';
+      var token=document.createElement('input');token.type='hidden';token.name='pwg_token';token.value=pwgToken;form.appendChild(token);
+      var connection=document.createElement('input');connection.type='hidden';connection.name='connection_id';connection.value=String(id);form.appendChild(connection);
+      var button=document.createElement('button');button.type='submit';button.className='buttonLike';button.name='bratonien_tool';button.value=tool;button.textContent=label;
+      if(modeValue)form.addEventListener('submit',function(){setMode(modeValue);});
+      form.appendChild(button);return form;
+    }
+    function escapeHtml(value){return String(value==null?'':value).replace(/[&<>"']/g,function(c){return {'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#039;'}[c];});}
+    function localEditorDialog(){
+      var dialog=document.getElementById('bratonien-nc-local-edit-dialog');
+      if(dialog)return dialog;
+      dialog=document.createElement('dialog');dialog.id='bratonien-nc-local-edit-dialog';dialog.className='bratonien-edit-dialog';
+      dialog.innerHTML='<div class="bratonien-edit-dialog__body"><div style="display:flex;align-items:center;justify-content:space-between;gap:1rem"><div><h4 style="margin:0">Verbindung bearbeiten</h4><p class="bratonien-base-note" style="margin:.35rem 0 0">Bestehende Legacy-Verbindung. Änderungen werden in derselben Verbindung gespeichert.</p></div><button type="button" class="buttonLike" data-local-edit-close>Schließen</button></div><div data-local-edit-content style="margin-top:1rem"></div></div>';
+      document.body.appendChild(dialog);
+      dialog.querySelector('[data-local-edit-close]').addEventListener('click',function(){dialog.close();});
+      dialog.addEventListener('click',function(event){if(event.target===dialog)dialog.close();});
+      return dialog;
+    }
+    function storageRow(storage){
+      return '<div class="bratonien-storage-row" data-storage-row>'+
+        '<label>Storage-ID<input name="nc_storage_id[]" value="'+escapeHtml(storage.storage_id||'')+'" required></label>'+
+        '<label>Quellordner<input name="nc_source_prefix[]" value="'+escapeHtml(storage.source_prefix||'')+'" placeholder="optional"></label>'+
+        '<label>Lokaler Speicherpfad<input name="nc_local_mount[]" value="'+escapeHtml(storage.local_mount||'')+'" required></label>'+
+        '<button type="button" class="buttonLike" data-remove-storage>Entfernen</button></div>';
+    }
+    function openLocalEditor(id){
+      var dialog=localEditorDialog();
+      var content=dialog.querySelector('[data-local-edit-content]');
+      content.innerHTML='<p class="bratonien-base-note">Verbindung wird geladen …</p>';
+      if(typeof dialog.showModal==='function')dialog.showModal();else dialog.setAttribute('open','open');
+      fetch('plugins/bratonien_tools/nc-connector-edit-data.php?connection_id='+encodeURIComponent(id)+'&_='+Date.now(),{credentials:'same-origin',cache:'no-store',headers:{'Accept':'application/json'}})
+        .then(function(response){return response.json().then(function(data){if(!response.ok)throw new Error(data.error||('HTTP '+response.status));return data;});})
+        .then(function(data){
+          if(data.adapter!=='local')throw new Error('Diese Verbindung ist keine Legacy-Verbindung.');
+          var legacy=data.legacy||{};var storages=Array.isArray(legacy.storages)?legacy.storages:[];
+          var rows=storages.map(storageRow).join('');
+          if(!rows)rows=storageRow({});
+          content.innerHTML='<form method="post" data-local-edit-form>'+
+            '<input type="hidden" name="pwg_token" value="'+escapeHtml(pwgToken)+'">'+
+            '<input type="hidden" name="connection_id" value="'+escapeHtml(data.id)+'">'+
+            '<div class="bratonien-form-grid">'+
+              '<label class="bratonien-label">Name</label><input name="connection_name" value="'+escapeHtml(data.name)+'" required>'+
+              '<label class="bratonien-label">Datenbank-Server</label><input name="nc_host" value="'+escapeHtml(legacy.host)+'" required>'+
+              '<label class="bratonien-label">Port</label><input name="nc_port" type="number" min="1" max="65535" value="'+escapeHtml(legacy.port||5432)+'" required>'+
+              '<label class="bratonien-label">Datenbank</label><input name="nc_database" value="'+escapeHtml(legacy.database)+'" required>'+
+              '<label class="bratonien-label">Reader-Benutzer</label><input name="nc_user" value="'+escapeHtml(legacy.user)+'" required>'+
+              '<label class="bratonien-label">Reader-Passwort</label><input name="nc_db_password" type="password" autocomplete="new-password" placeholder="leer = unverändert">'+
+            '</div>'+
+            '<h5 style="margin-top:1rem">Speicherorte</h5><p class="bratonien-base-note">Jeder Speicherort wird einzeln bearbeitet. Es ist kein Pipe-/Textformat erforderlich.</p><div data-storage-list>'+rows+'</div><button type="button" class="buttonLike" data-add-storage>Speicherort hinzufügen</button>'+
+            '<details style="margin-top:1rem"><summary>Erweiterte Legacy-Einstellungen</summary><div class="bratonien-form-grid" style="margin-top:.75rem">'+
+              '<label class="bratonien-label">Source-View</label><input name="nc_source_view" value="'+escapeHtml(legacy.source_view)+'" required>'+
+              '<label class="bratonien-label">Activity-View</label><input name="nc_activity_view" value="'+escapeHtml(legacy.activity_view)+'" required>'+
+              '<label class="bratonien-label">Piwigo-Galerieordner</label><input name="nc_gallery_root" value="'+escapeHtml(legacy.gallery_root)+'" required>'+
+              '<label class="bratonien-label">Ruhezeit (Sek.)</label><input name="nc_quiet_seconds" type="number" min="0" value="'+escapeHtml(legacy.quiet_seconds)+'">'+
+              '<label class="bratonien-label">Maximale Wartezeit (Sek.)</label><input name="nc_max_wait_seconds" type="number" min="60" value="'+escapeHtml(legacy.max_wait_seconds)+'">'+
+              '<label class="bratonien-label">Vollprüfung nach (Sek.)</label><input name="nc_full_sync_seconds" type="number" min="300" value="'+escapeHtml(legacy.full_sync_seconds)+'">'+
+            '</div></details>'+
+            '<div class="bratonien-actions" style="margin-top:1rem"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_update_local">Änderungen speichern</button><button class="buttonLike" type="button" data-local-edit-cancel>Abbrechen</button></div></form>';
+          var form=content.querySelector('[data-local-edit-form]');
+          form.querySelector('[data-local-edit-cancel]').addEventListener('click',function(){dialog.close();});
+          form.querySelector('[data-add-storage]').addEventListener('click',function(){form.querySelector('[data-storage-list]').insertAdjacentHTML('beforeend',storageRow({}));});
+          form.addEventListener('click',function(event){var remove=event.target.closest('[data-remove-storage]');if(remove){var row=remove.closest('[data-storage-row]');if(row)row.remove();}});
+        })
+        .catch(function(error){content.innerHTML='<p class="bratonien-main-cache__warning"><strong>Bearbeiten nicht möglich:</strong> '+escapeHtml(error.message||String(error))+'</p>';});
+    }
+
+    [].slice.call(section.querySelectorAll('button[value="nc_connector_edit_start"]')).forEach(function(button){var form=button.closest('form');if(form)form.remove();});
+
+    [].slice.call(section.querySelectorAll('button[value="nc_connector_delete"]')).forEach(function(deleteButton){
+      var deleteForm=deleteButton.closest('form');var card=deleteButton.closest('details');if(!deleteForm||!card)return;
+      var idInput=deleteForm.querySelector('input[name="connection_id"]');if(!idInput)return;var id=idInput.value;
+      var actions=deleteForm.parentElement;if(!actions)return;
+      var text=card.textContent||'';var isLocal=text.indexOf('bestehende Legacy-Konfiguration')!==-1;
+      if(isLocal){
+        var edit=document.createElement('button');edit.type='button';edit.className='buttonLike';edit.textContent='Bearbeiten';edit.addEventListener('click',function(){openLocalEditor(id);});actions.insertBefore(edit,deleteForm);
+        actions.insertBefore(makePostButton('Auf WebDAV migrieren','nc_connector_migrate_start',id,'migrate'),deleteForm);
+      }else{
+        actions.insertBefore(makePostButton('Bearbeiten','nc_connector_edit_start',id,'edit'),deleteForm);
+      }
+    });
+  }
+
   function initNCConnectorPolling(){
     var section=document.getElementById('nc-connector');if(!section)return;
     var endpoint='plugins/bratonien_tools/nc-connector-status.php';
+    var pollTimer=null;
 
     function valueNodeForLabel(labelText){
       var labels=[].slice.call(section.querySelectorAll('.bratonien-label'));
@@ -57,23 +226,43 @@
       return null;
     }
 
+    function lastResultValueNode(){
+      var notes=[].slice.call(section.querySelectorAll('.bratonien-base-note'));
+      for(var i=0;i<notes.length;i++){
+        var text=(notes[i].textContent||'').trim();
+        if(text.indexOf('Letztes Ergebnis:')===0){
+          return notes[i].querySelector('strong');
+        }
+      }
+      return null;
+    }
+
     var lastRunNode=valueNodeForLabel('Letzter Lauf');
     var nextRunNode=valueNodeForLabel('Nächster Lauf');
+    var lastResultNode=lastResultValueNode();
+
+    function render(data){
+      if(lastRunNode&&typeof data.last_run_label==='string'&&data.last_run_label!=='')lastRunNode.textContent=data.last_run_label;
+      if(nextRunNode&&typeof data.next_run_label==='string'&&data.next_run_label!=='')nextRunNode.textContent=data.next_run_label;
+      if(lastResultNode&&typeof data.message==='string'&&data.message!=='')lastResultNode.textContent=data.message;
+    }
 
     function poll(){
-      fetch(endpoint+'?_='+Date.now(),{credentials:'same-origin',cache:'no-store'})
+      fetch(endpoint+'?_='+Date.now(),{credentials:'same-origin',cache:'no-store',headers:{'Accept':'application/json'}})
         .then(function(response){if(!response.ok)throw new Error('HTTP '+response.status);return response.json();})
-        .then(function(data){
+        .then(render)
-          if(lastRunNode&&data.last_run_label)lastRunNode.textContent=data.last_run_label;
-          if(nextRunNode&&data.next_run_label)nextRunNode.textContent=data.next_run_label;
-        })
         .catch(function(){});
     }
 
-    poll();window.setInterval(poll,5000);
+    function schedule(){
+      if(pollTimer)window.clearInterval(pollTimer);
+      pollTimer=window.setInterval(poll,5000);
     }
 
-  function initAll(){initBratonienTabs();initNCConnectorPolling();}
+    poll();schedule();
+  }
+
+  function initAll(){initBratonienTabs();initNCWizardLifecycle();initNCConnectionEditing();initNCConnectorPolling();}
   if(document.readyState==='loading')document.addEventListener('DOMContentLoaded',initAll);else initAll();
 })();
 </script>

template/nc_connector_admin.tpl

@@ -32,7 +32,28 @@
   <dialog id="bratonien-nc-wizard-dialog" style="width:min(980px,calc(100vw - 3rem));max-height:88vh;overflow:auto;background:#444;color:inherit;border:1px solid #777;border-radius:4px;padding:0;box-shadow:0 18px 60px rgba(0,0,0,.55)">
     <div style="padding:1.25rem 1.5rem">
       <div style="display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1rem">
-        <div><h4 style="margin:0">Neue Verbindung</h4><p class="bratonien-base-note" style="margin:.35rem 0 0"><strong>Schritt {$NC_CONNECTOR.wizard.step|escape:html} von 4</strong></p></div>
+        <div>
+          <h4 style="margin:0">Neue Verbindung</h4>
+          <p class="bratonien-base-note" style="margin:.35rem 0 0"><strong>
+            {if $NC_CONNECTOR.wizard.step == 1}
+              Anmeldung
+            {elseif $NC_CONNECTOR.wizard.step == 2 && $NC_CONNECTOR.wizard.technical_stage == 'database_details'}
+              Datenbank prüfen
+            {elseif $NC_CONNECTOR.wizard.step == 2 && $NC_CONNECTOR.wizard.technical_stage == 'mounts' && !$NC_CONNECTOR.wizard.directory_selection_ready}
+              Speicher zuordnen
+            {elseif $NC_CONNECTOR.wizard.step == 2 && $NC_CONNECTOR.wizard.technical_stage == 'mounts' && $NC_CONNECTOR.wizard.directory_selection_ready}
+              Verzeichnisse auswählen
+            {elseif $NC_CONNECTOR.wizard.step == 2 && $NC_CONNECTOR.wizard.technical_complete}
+              Verbindung benennen
+            {elseif $NC_CONNECTOR.wizard.step == 3}
+              Piwigo-API
+            {elseif $NC_CONNECTOR.wizard.step == 4}
+              Abschluss
+            {else}
+              Einrichtung
+            {/if}
+          </strong></p>
+        </div>
         <button class="buttonLike" type="button" id="bratonien-nc-wizard-close">Schließen</button>
       </div>
 
@@ -52,30 +73,17 @@
         </form>
 
       {elseif $NC_CONNECTOR.wizard.step == 2}
-        <p class="bratonien-base-note"><strong>Nextcloud wurde gefunden.</strong> Der Assistent prüft jetzt, wie die freigegebenen Dateien gelesen werden können.</p>
+        <p class="bratonien-base-note"><strong>Nextcloud wurde gefunden.</strong> Für den Datenzugriff wird die bekannte Reader-Verbindung verwendet. Verzeichnisse werden ausschließlich mit dem angemeldeten Nextcloud-Benutzer gelesen.</p>
         <div class="bratonien-form-grid">
           <span class="bratonien-label">Adresse</span><strong>{$NC_CONNECTOR.wizard.base_url|escape:html}</strong>
           <span class="bratonien-label">Version</span><strong>{if $NC_CONNECTOR.wizard.version}{$NC_CONNECTOR.wizard.version|escape:html}{else}Nicht gemeldet{/if}</strong>
           <span class="bratonien-label">Angemeldet als</span><strong>{$NC_CONNECTOR.wizard.username|escape:html}{if $NC_CONNECTOR.wizard.display_name} · {$NC_CONNECTOR.wizard.display_name|escape:html}{/if}</strong>
         </div>
 
-        {if $NC_CONNECTOR.wizard.technical_stage == 'reader_credentials'}
+        {if $NC_CONNECTOR.wizard.technical_stage == 'database_details'}
-          <hr>
-          <h5>Datenzugriff</h5>
-          <p class="bratonien-base-note">Nextcloud gibt den internen Lesezugang aus Sicherheitsgründen nicht über die normale API aus. Bitte nur den dafür eingerichteten Lese-Benutzer angeben. Die üblichen Verbindungswerte prüft der Assistent selbst.</p>
-          <form method="post" data-bratonien-wizard-form>
-            <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
-            <div class="bratonien-form-grid">
-              <label class="bratonien-label">Lese-Benutzer</label><input name="nc_wizard_db_user" type="text" value="{$NC_CONNECTOR.wizard.db_user|escape:html}" required>
-              <label class="bratonien-label">Passwort</label><input name="nc_wizard_db_password" type="password" autocomplete="new-password" value="{$NC_CONNECTOR.wizard._db_password|escape:html}" required>
-            </div>
-            <p><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_save_technical">Automatisch prüfen</button></p>
-          </form>
-
-        {elseif $NC_CONNECTOR.wizard.technical_stage == 'database_details'}
           <hr>
           <h5>Datenbank-Adresse prüfen</h5>
-          <p class="bratonien-base-note">Der übliche Weg hat nicht funktioniert. Deshalb werden jetzt nur die Angaben abgefragt, die davon abweichen können.</p>
+          <p class="bratonien-base-note">Die bekannte Reader-Verbindung konnte mit der gespeicherten Adresse nicht bestätigt werden.</p>
           {if $NC_CONNECTOR.wizard.technical_error}<details><summary>Technische Details</summary><p class="bratonien-main-cache__warning">{$NC_CONNECTOR.wizard.technical_error|escape:html}</p></details>{/if}
           <form method="post" data-bratonien-wizard-form>
             <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
@@ -83,16 +91,74 @@
               <label class="bratonien-label">Datenbank-Adresse</label><input name="nc_wizard_db_host" type="text" value="{$NC_CONNECTOR.wizard.db_host|escape:html}" required>
               <label class="bratonien-label">Port</label><input name="nc_wizard_db_port" type="number" min="1" max="65535" value="{$NC_CONNECTOR.wizard.db_port|escape:html}" required>
               <label class="bratonien-label">Datenbank</label><input name="nc_wizard_db_database" type="text" value="{$NC_CONNECTOR.wizard.db_database|escape:html}" required>
-              <label class="bratonien-label">Lese-Benutzer</label><input name="nc_wizard_db_user" type="text" value="{$NC_CONNECTOR.wizard.db_user|escape:html}" required>
-              <label class="bratonien-label">Passwort</label><input name="nc_wizard_db_password" type="password" autocomplete="new-password" value="{$NC_CONNECTOR.wizard._db_password|escape:html}" required>
             </div>
             <p><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_save_technical">Erneut prüfen</button></p>
           </form>
 
         {elseif $NC_CONNECTOR.wizard.technical_stage == 'mounts'}
           <hr>
+          {if $NC_CONNECTOR.wizard.directory_selection_ready}
+            <h5>Verzeichnisse auswählen</h5>
+            <p class="bratonien-base-note">Es werden nur Verzeichnisse angezeigt, auf die <strong>{$NC_CONNECTOR.wizard.username|escape:html}</strong> in Nextcloud Zugriff hat. Mehrere Verzeichnisse können hinzugefügt werden. Bleibt die Auswahl leer, wird automatisch das Stammverzeichnis verwendet.</p>
+
+            <div class="bratonien-form-grid">
+              <span class="bratonien-label">Ausgewählt</span>
+              <div>
+                {if $NC_CONNECTOR.wizard.directory_selected|@count > 0}
+                  {foreach from=$NC_CONNECTOR.wizard.directory_selected item=selected_path}
+                    <form method="post" class="bratonien-actions" style="margin:.25rem 0" data-bratonien-wizard-form>
+                      <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
+                      <input type="hidden" name="nc_wizard_directory_remove" value="{$selected_path|escape:html}">
+                      <strong style="flex:1">{if $selected_path}{$selected_path|escape:html}{else}Stammverzeichnis{/if}</strong>
+                      <button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_directory_remove">Entfernen</button>
+                    </form>
+                  {/foreach}
+                {else}
+                  <span class="bratonien-base-note">Keine Auswahl – Stammverzeichnis wird verwendet.</span>
+                {/if}
+              </div>
+
+              <span class="bratonien-label">Aktueller Ordner</span><strong>/{if $NC_CONNECTOR.wizard.directory_path}{$NC_CONNECTOR.wizard.directory_path|escape:html}{/if}</strong>
+            </div>
+
+            <div class="bratonien-actions" style="margin:.75rem 0">
+              <form method="post" data-bratonien-wizard-form>
+                <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
+                <button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_directory_add">Diesen Ordner hinzufügen</button>
+              </form>
+              {if $NC_CONNECTOR.wizard.directory_path}
+                <form method="post" data-bratonien-wizard-form>
+                  <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
+                  <input type="hidden" name="nc_wizard_directory_path" value="{$NC_CONNECTOR.wizard.directory_parent|escape:html}">
+                  <button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_directory_browse">Eine Ebene hoch</button>
+                </form>
+              {/if}
+            </div>
+
+            <div style="margin:.75rem 0">
+              {if $NC_CONNECTOR.wizard.directory_children|@count > 0}
+                {foreach from=$NC_CONNECTOR.wizard.directory_children item=directory_name key=directory_path}
+                  <form method="post" style="margin:.3rem 0" data-bratonien-wizard-form>
+                    <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
+                    <input type="hidden" name="nc_wizard_directory_path" value="{$directory_path|escape:html}">
+                    <button class="buttonLike" style="width:100%;text-align:left" type="submit" name="bratonien_tool" value="nc_connector_wizard_directory_browse">📁 {$directory_name|escape:html}</button>
+                  </form>
+                {/foreach}
+              {else}
+                <p class="bratonien-base-note">Keine Unterordner vorhanden.</p>
+              {/if}
+            </div>
+
+            <form method="post" data-bratonien-wizard-form>
+              <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
+              {foreach from=$NC_CONNECTOR.wizard.storage_candidates item=storage key=storage_index}
+                <input type="hidden" name="nc_wizard_storage_mount[{$storage_index|escape:html}]" value="{$storage.local_mount|escape:html}">
+              {/foreach}
+              <p><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_save_mounts">Verzeichnisse übernehmen</button></p>
+            </form>
+          {else}
             <h5>Speicherort bestätigen</h5>
-          <p class="bratonien-base-note">Die Datenquelle wurde gefunden. Nur Speicherorte, die nicht sicher erkannt werden konnten, müssen jetzt einmalig zugeordnet werden.</p>
+            <p class="bratonien-base-note">Die Datenquelle wurde gefunden. Ein technischer Speicherort konnte nicht automatisch zugeordnet werden.</p>
             <form method="post" data-bratonien-wizard-form>
               <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
               <div class="bratonien-form-grid">
@@ -108,29 +174,26 @@
               </div>
               <p><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_save_mounts">Speicher prüfen</button></p>
             </form>
+          {/if}
 
         {elseif $NC_CONNECTOR.wizard.technical_complete}
           <hr>
-          <h5>Welche Freigaben sollen verwendet werden?</h5>
+          <h5>Verbindung benennen</h5>
-          <p class="bratonien-base-note"><strong>Empfehlung:</strong> ein eigener Showcase-Benutzer. So bleibt die Verbindung unabhängig von persönlichen Konten.</p>
+          <p class="bratonien-base-note">Diese Verbindung verwendet ausschließlich den in Schritt 1 angemeldeten Nextcloud-Benutzer.</p>
           <form method="post" data-bratonien-wizard-form>
             <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
             <div class="bratonien-form-grid">
               <label class="bratonien-label" for="nc_wizard_connection_name">Name der Verbindung</label><input id="nc_wizard_connection_name" name="nc_wizard_connection_name" type="text" value="{$NC_CONNECTOR.wizard.connection_name|escape:html}" required>
-              <label class="bratonien-label" for="nc_wizard_showcase_user">Nextcloud-Benutzer</label>
+              <span class="bratonien-label">Nextcloud-Benutzer</span><strong>{$NC_CONNECTOR.wizard.username|escape:html}</strong>
-              {if $NC_CONNECTOR.wizard.can_list_users && $NC_CONNECTOR.wizard.users|@count > 0}
-                <select id="nc_wizard_showcase_user" name="nc_wizard_showcase_user" required>
-                  {foreach from=$NC_CONNECTOR.wizard.users item=nc_user}<option value="{$nc_user|escape:html}"{if $nc_user == 'showcase'} selected{/if}>{$nc_user|escape:html}{if $nc_user == 'showcase'} · empfohlen{/if}</option>{/foreach}
-                </select>
-              {else}
-                <input id="nc_wizard_showcase_user" name="nc_wizard_showcase_user" type="text" value="{if $NC_CONNECTOR.wizard.showcase_user}{$NC_CONNECTOR.wizard.showcase_user|escape:html}{else}showcase{/if}" required>
-              {/if}
             </div>
             <p><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_select_user">Weiter</button></p>
           </form>
         {/if}
 
-        <form method="post" style="margin-top:1rem" data-bratonien-wizard-form><input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_reset" data-bratonien-wizard-end>Neu beginnen</button></form>
+        <div class="bratonien-actions" style="margin-top:1rem">
+          <form method="post" data-bratonien-wizard-form><input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_back">Zurück</button></form>
+          <form method="post" data-bratonien-wizard-form><input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_reset" data-bratonien-wizard-end>Neu beginnen</button></form>
+        </div>
 
       {elseif $NC_CONNECTOR.wizard.step == 3}
         <p class="bratonien-base-note"><strong>Nextcloud ist vorbereitet.</strong> Jetzt wird der bevorzugte Piwigo-Zugang geprüft.</p>
@@ -143,13 +206,14 @@
           </div>
           <div class="bratonien-actions"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_api_test">API testen</button><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_api_skip" formnovalidate>Überspringen</button></div>
         </form>
+        <form method="post" style="margin-top:1rem" data-bratonien-wizard-form><input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_back">Zurück</button></form>
 
       {elseif $NC_CONNECTOR.wizard.step == 4}
         <p class="bratonien-base-note"><strong>Fast fertig.</strong> Die Verbindung wurde noch nicht angelegt. Erst der letzte Button übernimmt die Einstellungen.</p>
         <div class="bratonien-form-grid">
           <span class="bratonien-label">Verbindung</span><strong>{$NC_CONNECTOR.wizard.connection_name|escape:html}</strong>
           <span class="bratonien-label">Nextcloud</span><strong>{$NC_CONNECTOR.wizard.base_url|escape:html}</strong>
-          <span class="bratonien-label">Freigaben von</span><strong>{$NC_CONNECTOR.wizard.showcase_user|escape:html}</strong>
+          <span class="bratonien-label">Nextcloud-Benutzer</span><strong>{$NC_CONNECTOR.wizard.username|escape:html}</strong>
           <span class="bratonien-label">Piwigo-API</span><strong>{if $NC_CONNECTOR.wizard.api_status == 'ok'}Erfolgreich geprüft{else}Übersprungen{/if}</strong>
         </div>
         <hr>
@@ -163,6 +227,7 @@
           </div>
           <div class="bratonien-actions"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_finish" data-bratonien-wizard-end>Verbindung anlegen</button><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_reset" formnovalidate data-bratonien-wizard-end>Abbrechen</button></div>
         </form>
+        <form method="post" style="margin-top:1rem" data-bratonien-wizard-form><input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_wizard_back">Zurück</button></form>
       {/if}
     </div>
   </dialog>
@@ -199,14 +264,28 @@
     {if $NC_CONNECTOR.connection_count > 0}
       {foreach from=$NC_CONNECTOR.connections item=connection}
         <details style="margin:.6rem 0">
-          <summary><strong>{$connection.display_name|escape:html}</strong> · {if $connection.enabled}aktiv{else}{$connection.takeover_state|escape:html}{/if}</summary>
+          <summary><strong>{$connection.display_name|escape:html}</strong> · {if $connection.enabled}aktiv{else}{$connection.takeover_state|escape:html}{/if}{if isset($connection.last_sync) && ($connection.last_sync.state == 'error' || $connection.last_sync.state == 'warning')} · Laufzeitproblem{/if}</summary>
           <div style="padding:.75rem 0">
             <form method="post" class="bratonien-actions"><input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}"><input type="hidden" name="connection_id" value="{$connection.id|escape:html}"><input name="connection_name" type="text" value="{$connection.name|escape:html}" required><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_update_name">Name speichern</button></form>
             <div class="bratonien-actions" style="margin-top:.6rem">
               {if $connection.adapter == 'local' && !$connection.enabled}<form method="post"><input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}"><input type="hidden" name="connection_id" value="{$connection.id|escape:html}"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_verify">Verbindung prüfen</button></form>{/if}
-              {if !$connection.enabled && $connection.takeover_state != 'active'}<form method="post"><input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}"><input type="hidden" name="connection_id" value="{$connection.id|escape:html}"><button class="buttonLike bratonien-delete-button" type="submit" name="bratonien_tool" value="nc_connector_delete" onclick="return confirm('Verbindung wirklich löschen? Bilder in Nextcloud oder Piwigo werden nicht gelöscht.');">Löschen</button></form>{/if}
+              <form method="post"><input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}"><input type="hidden" name="connection_id" value="{$connection.id|escape:html}"><button class="buttonLike bratonien-delete-button" type="submit" name="bratonien_tool" value="nc_connector_delete" onclick="return confirm('Verbindung wirklich löschen? Die Verbindung wird sofort aus Bratonien Tools entfernt und beim nächsten Connector-Lauf auch aus der Laufzeit entfernt. Bilder in Nextcloud oder Piwigo werden nicht gelöscht.');">Löschen</button></form>
             </div>
-            {if isset($connection.last_sync) && $connection.last_sync.timestamp > 0}<p class="bratonien-base-note"><strong>Letzter Abgleich:</strong> {$connection.last_sync.label|escape:html} · {$connection.last_sync.message|escape:html}</p>{/if}
+            {if isset($connection.last_sync) && $connection.last_sync.timestamp > 0}
+              <p class="bratonien-base-note"><strong>Letzter Abgleich:</strong> {$connection.last_sync.label|escape:html} · {$connection.last_sync.message|escape:html}</p>
+              {if $connection.last_sync.state == 'error'}<p class="bratonien-main-cache__warning"><strong>Laufzeitfehler:</strong> {$connection.last_sync.message|escape:html}</p>{/if}
+              {if $connection.last_sync.state == 'warning'}<p class="bratonien-main-cache__warning"><strong>Laufzeitwarnung:</strong> {$connection.last_sync.message|escape:html}</p>{/if}
+              {if $connection.last_sync.api_state == 'error'}<p class="bratonien-main-cache__warning"><strong>API:</strong> {$connection.last_sync.api_message|escape:html}</p>{/if}
+              {if $connection.last_sync.fallback_state == 'error'}<p class="bratonien-main-cache__warning"><strong>Fallback:</strong> {$connection.last_sync.fallback_message|escape:html}</p>{/if}
+              {if $connection.last_sync.error_detail}<details><summary>Technische Laufzeitdetails</summary><p class="bratonien-main-cache__warning">{$connection.last_sync.error_detail|escape:html}</p></details>{/if}
+            {else}
+              <p class="bratonien-base-note"><strong>Laufzeit:</strong> Noch kein Laufstatus für diese Verbindung vorhanden.</p>
+            {/if}
+            {if isset($connection.config.api_enabled)}
+              <p class="bratonien-base-note"><strong>Piwigo-Zugang dieser Verbindung:</strong> {if $connection.config.api_enabled}eigene API{elseif $connection.fallback_stored}Fallback{else}kein Zugang gespeichert{/if}</p>
+            {else}
+              <p class="bratonien-base-note"><strong>Piwigo-Zugang:</strong> bestehende Legacy-Konfiguration</p>
+            {/if}
             {if $connection.verification_checks|@count > 0}<details><summary>Letzte Prüfung</summary><ul>{foreach from=$connection.verification_checks item=check}<li>{if $check.ok}✓{else}✗{/if} {$check.name|escape:html}: {$check.detail|escape:html}</li>{/foreach}</ul></details>{/if}
             <details style="margin-top:.75rem"><summary>Technische Einstellungen</summary>
               {if $connection.enabled || $connection.takeover_state == 'active'}<p class="bratonien-main-cache__warning">Aktive Verbindungen können technisch nicht geändert werden.</p>{else}

webdav-image.php

@@ -0,0 +1,173 @@
+<?php
+define('PHPWG_ROOT_PATH', '../../');
+include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+
+if (!defined('BRATONIEN_TOOLS_PATH'))
+{
+  define('BRATONIEN_TOOLS_ID', basename(__DIR__));
+  define('BRATONIEN_TOOLS_PATH', PHPWG_ROOT_PATH.'plugins/'.BRATONIEN_TOOLS_ID.'/');
+}
+require_once(BRATONIEN_TOOLS_PATH.'include/webdav_image_runtime.inc.php');
+
+function bratonien_tools_webdav_image_abort($status, $message)
+{
+  http_response_code((int)$status);
+  header('Content-Type: text/plain; charset=utf-8');
+  header('Cache-Control: no-store');
+  echo $message;
+  exit;
+}
+
+function bratonien_tools_webdav_image_decrypt_secret($blob, $hex_key)
+{
+  $hex_key = trim((string)$hex_key);
+  if (!preg_match('/^[a-f0-9]{64}$/', $hex_key)) return null;
+  $outer = base64_decode(trim((string)$blob), true);
+  $payload = is_string($outer) ? json_decode($outer, true) : null;
+  if (!is_array($payload) || (int)($payload['v'] ?? 0) !== 1) return null;
+  $iv = base64_decode((string)($payload['iv'] ?? ''), true);
+  $tag = base64_decode((string)($payload['tag'] ?? ''), true);
+  $cipher = base64_decode((string)($payload['data'] ?? ''), true);
+  if (!is_string($iv) || !is_string($tag) || !is_string($cipher)) return null;
+  $plain = openssl_decrypt($cipher, 'aes-256-gcm', hex2bin($hex_key), OPENSSL_RAW_DATA, $iv, $tag);
+  if ($plain === false) return null;
+  $decoded = json_decode((string)$plain, true);
+  return is_array($decoded) ? $decoded : null;
+}
+
+function bratonien_tools_webdav_image_quote_path($path)
+{
+  $parts = array_values(array_filter(explode('/', trim((string)$path, '/')), 'strlen'));
+  return implode('/', array_map('rawurlencode', $parts));
+}
+
+$image_id = (int)($_GET['id'] ?? 0);
+if ($image_id < 1) bratonien_tools_webdav_image_abort(400, 'Bild-ID fehlt.');
+
+$permission_condition = get_sql_condition_FandF(array('forbidden_categories'=>'category_id'), null, true);
+$access_result = pwg_query('SELECT 1 FROM '.IMAGE_CATEGORY_TABLE.' WHERE image_id='.$image_id.' AND '.$permission_condition.' LIMIT 1');
+if (!pwg_db_num_rows($access_result)) bratonien_tools_webdav_image_abort(403, 'Kein Zugriff auf dieses Bild.');
+
+$source = bratonien_tools_webdav_image_source_info($image_id);
+if (!$source) bratonien_tools_webdav_image_abort(404, 'Keine WebDAV-Quelle für dieses Bild gefunden.');
+
+if (!empty($_GET['preview']))
+{
+  $preview = bratonien_tools_webdav_preview_path($source);
+  if ($preview)
+  {
+    $mtime = @filemtime($preview) ?: time();
+    $etag = sha1($preview.'|'.$mtime.'|'.(@filesize($preview) ?: 0));
+    header('Content-Type: '.bratonien_tools_webdav_preview_content_type($preview));
+    header('Content-Length: '.(string)filesize($preview));
+    header('ETag: "'.$etag.'"');
+    header('Cache-Control: private, max-age=86400, must-revalidate');
+    header('X-Content-Type-Options: nosniff');
+    $client_etag = trim((string)($_SERVER['HTTP_IF_NONE_MATCH'] ?? ''), " \t\r\n\"");
+    if ($client_etag !== '' && hash_equals($etag, $client_etag))
+    {
+      http_response_code(304);
+      exit;
+    }
+    if (($_SERVER['REQUEST_METHOD'] ?? 'GET') !== 'HEAD') readfile($preview);
+    exit;
+  }
+}
+
+$table = $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+$result = pwg_query('SELECT config_json, secret_blob FROM `'.$table.'` WHERE id='.(int)$source['connection_id'].' LIMIT 1');
+if (!pwg_db_num_rows($result)) bratonien_tools_webdav_image_abort(404, 'WebDAV-Verbindung nicht gefunden.');
+$row = pwg_db_fetch_assoc($result);
+$config = json_decode((string)$row['config_json'], true);
+if (!is_array($config)) bratonien_tools_webdav_image_abort(500, 'WebDAV-Konfiguration ist ungültig.');
+
+$key_result = pwg_query("SELECT value FROM ".$GLOBALS['prefixeTable']."config WHERE param='bratonien_nc_connector_secret' LIMIT 1");
+if (!pwg_db_num_rows($key_result)) bratonien_tools_webdav_image_abort(500, 'Connector-Schlüssel fehlt.');
+$key_row = pwg_db_fetch_assoc($key_result);
+$credentials = bratonien_tools_webdav_image_decrypt_secret((string)$row['secret_blob'], (string)$key_row['value']);
+if (!is_array($credentials)) bratonien_tools_webdav_image_abort(500, 'WebDAV-Zugangsdaten konnten nicht gelesen werden.');
+
+$base_url = rtrim((string)($config['nextcloud_url'] ?? ''), '/');
+$user = trim((string)($credentials['nextcloud_user'] ?? ''));
+$password = (string)($credentials['nextcloud_password'] ?? '');
+$webdav_path = trim((string)$source['webdav_path'], '/');
+if ($base_url === '' || $user === '' || $password === '' || $webdav_path === '')
+{
+  bratonien_tools_webdav_image_abort(500, 'WebDAV-Bildquelle ist unvollständig.');
+}
+
+$etag = trim((string)($source['etag'] ?? ''));
+if ($etag !== '')
+{
+  header('ETag: "'.str_replace('"', '', $etag).'"');
+  $client_etag = trim((string)($_SERVER['HTTP_IF_NONE_MATCH'] ?? ''), " \t\r\n\"");
+  if ($client_etag !== '' && hash_equals($etag, $client_etag))
+  {
+    http_response_code(304);
+    exit;
+  }
+}
+header('Cache-Control: private, max-age=300, must-revalidate');
+header('X-Content-Type-Options: nosniff');
+
+$url = $base_url.'/remote.php/dav/files/'.rawurlencode($user).'/'.bratonien_tools_webdav_image_quote_path($webdav_path);
+$ch = curl_init($url);
+$options = array(
+  CURLOPT_FOLLOWLOCATION => false,
+  CURLOPT_CONNECTTIMEOUT => 10,
+  CURLOPT_TIMEOUT => 120,
+  CURLOPT_HTTPAUTH => CURLAUTH_BASIC,
+  CURLOPT_USERPWD => $user.':'.$password,
+  CURLOPT_RETURNTRANSFER => false,
+  CURLOPT_FAILONERROR => false,
+  CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Image/0.9.6.1',
+  CURLOPT_HEADERFUNCTION => function($ch, $line)
+  {
+    $length = strlen($line);
+    $trimmed = trim($line);
+    if ($trimmed === '') return $length;
+    if (preg_match('#^HTTP/\S+\s+([0-9]{3})#i', $trimmed, $m))
+    {
+      http_response_code((int)$m[1]);
+      return $length;
+    }
+    $colon = strpos($line, ':');
+    if ($colon === false) return $length;
+    $name = strtolower(trim(substr($line, 0, $colon)));
+    $value = trim(substr($line, $colon + 1));
+    if (in_array($name, array('content-type','content-length','content-range','accept-ranges','last-modified'), true))
+    {
+      header($name.': '.$value, true);
+    }
+    return $length;
+  },
+  CURLOPT_WRITEFUNCTION => function($ch, $data)
+  {
+    echo $data;
+    return strlen($data);
+  },
+);
+if (!empty($_SERVER['HTTP_RANGE']))
+{
+  $range = trim((string)$_SERVER['HTTP_RANGE']);
+  if (preg_match('/^bytes=(.+)$/i', $range, $m)) $options[CURLOPT_RANGE] = $m[1];
+}
+if (($_SERVER['REQUEST_METHOD'] ?? 'GET') === 'HEAD')
+{
+  $options[CURLOPT_NOBODY] = true;
+}
+curl_setopt_array($ch, $options);
+$ok = curl_exec($ch);
+$errno = curl_errno($ch);
+$http = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+curl_close($ch);
+
+if ($ok === false || $errno !== 0)
+{
+  if (!headers_sent()) bratonien_tools_webdav_image_abort(502, 'Nextcloud-Bild konnte nicht geladen werden.');
+  exit;
+}
+if ($http < 200 || $http >= 400)
+{
+  exit;
+}