- admin/update : filesystem synchronization process completely

rewritten. How to speed up sync ? by avoiding recursivity !

- admin/update : option to display verbose information details

- admin/update : option to simulate only. No database insert, delete or
  update will be made

- bug fixed : in admin/cat_list, if you delete a virtual category, you may
  create a gap in the rank list. This gap will generate errors when trying
  to move a category on this gap. Fixed by calling ordering and
  update_global_rank at category deletion.

- admin/cat_list, only one query to insert a new virtual category (no need
  of a second query to update uppercats and global_rank)

- for a given category, even if empty, the representing element must not be
  the one of a forbidden category for the current user

- generation time optionnaly displayed on the bottom of each page becomes
  more price : number of SQL queries and SQL time added.


git-svn-id: http://piwigo.org/svn/trunk@659 68402e56-0260-453c-a942-63ccdbb3a9ee

include/category_subcats.inc.php

@@ -69,7 +69,14 @@ while ($row = mysql_fetch_array($result))
 SELECT path, tn_ext
   FROM '.CATEGORIES_TABLE.' AS c INNER JOIN '.IMAGES_TABLE.' AS i
     ON i.id = c.representative_picture_id
-  WHERE uppercats REGEXP \'(^|,)'.$row['id'].'(,|$)\'
+  WHERE uppercats REGEXP \'(^|,)'.$row['id'].'(,|$)\'';
+  // we must not show pictures of a forbidden category
+  if ($user['forbidden_categories'] != '')
+  {
+    $query.= '
+    AND c.id NOT IN ('.$user['forbidden_categories'].')';
+  }
+  $query.= '
   ORDER BY RAND()
   LIMIT 0,1
 ;';