diff --git a/include/album_lock.inc.php b/include/album_lock.inc.php
new file mode 100644
index 0000000..e688da8
--- /dev/null
+++ b/include/album_lock.inc.php
@@ -0,0 +1,58 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_get_public_albums()
+{
+  $query = "SELECT id, name, uppercats FROM ".CATEGORIES_TABLE." WHERE status = 'public' ORDER BY global_rank ASC, name ASC";
+  return query2array($query);
+}
+
+function bratonien_tools_lock_album()
+{
+  global $user;
+
+  $category_id = isset($_POST['lock_category_id']) ? (int)$_POST['lock_category_id'] : 0;
+  if ($category_id < 1)
+  {
+    throw new Exception('Bitte ein öffentliches Album auswählen.');
+  }
+
+  $query = 'SELECT id, name, status FROM '.CATEGORIES_TABLE.' WHERE id = '.$category_id.' LIMIT 1';
+  $result = pwg_query($query);
+  if (!pwg_db_num_rows($result))
+  {
+    throw new Exception('Das gewählte Album existiert nicht.');
+  }
+
+  $album = pwg_db_fetch_assoc($result);
+  if ($album['status'] === 'private')
+  {
+    bratonien_tools_ensure_private_album_access($category_id, (int)$user['id']);
+    if (function_exists('invalidate_user_cache'))
+    {
+      invalidate_user_cache();
+    }
+
+    return array('message' => 'Das Album ist bereits privat. Dein Zugriff wurde sichergestellt.');
+  }
+
+  if (!function_exists('set_cat_status'))
+  {
+    include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
+  }
+
+  set_cat_status(array($category_id), 'private');
+  bratonien_tools_ensure_private_album_access($category_id, (int)$user['id']);
+
+  if (function_exists('invalidate_user_cache'))
+  {
+    invalidate_user_cache();
+  }
+
+  return array(
+    'message' => 'Album „'.$album['name'].'“ wurde privat geschaltet. Dein Benutzer behält Zugriff.',
+  );
+}