/**
  * Sets order of bookmarks in the currently loaded folder to the order of bookmark_ids as set in $pa_bookmark_ids
  *
  * @param array $pa_bookmark_ids A list of bookmark_ids in the folder, in the order in which they should be displayed in the ui
  * @param int $pn_folder_id Optional folder_id to set
  * @param int $pn_user_id Optional user_id to enforce for folder selection
  * @param array $pa_options An optional array of options. Supported options include:
  *			
  * @return array An array of errors. If the array is empty then no errors occurred
  */
 public function reorderBookmarks($pa_bookmark_ids, $pn_folder_id = null, $pn_user_id = null, $pa_options = null)
 {
     if (!($vn_folder_id = $this->_getFolderID($pn_folder_id, $pn_user_id))) {
         return false;
     }
     $va_bookmark_ranks = $this->getBookmarkIDRanks($pn_folder_id, $pn_user_id, $pa_options);
     // get current ranks
     $vn_i = 0;
     $vb_web_set_transaction = false;
     if (!$this->inTransaction()) {
         $o_trans = new Transaction($this->getDb());
         $vb_web_set_transaction = true;
     } else {
         $o_trans = $this->getTransaction();
     }
     $t_bookmark = new ca_bookmarks();
     $t_bookmark->setTransaction($o_trans);
     $t_bookmark->setMode(ACCESS_WRITE);
     $va_errors = array();
     // delete rows not present in $pa_stop_ids
     $va_to_delete = array();
     foreach ($va_bookmark_ranks as $vn_bookmark_id => $va_rank) {
         if (!in_array($vn_bookmark_id, $pa_bookmark_ids)) {
             if ($t_bookmark->load(array('folder_id' => $vn_folder_id, 'bookmark' => $vn_bookmark_id))) {
                 $t_bookmark->delete(true);
             }
         }
     }
     // rewrite ranks
     foreach ($pa_bookmark_ids as $vn_rank => $vn_bookmark_id) {
         if (isset($va_bookmark_ranks[$vn_bookmark_id]) && $t_bookmark->load(array('folder_id' => $vn_folder_id, 'bookmark_id' => $vn_bookmark_id))) {
             if ($va_bookmark_ranks[$vn_bookmark_id] != $vn_rank) {
                 $t_bookmark->set('rank', $vn_rank);
                 $t_bookmark->update();
                 if ($t_bookmark->numErrors()) {
                     $va_errors[$vn_bookmark_id] = _t('Could not reorder bookmark %1: %2', $vn_bookmark_id, join('; ', $t_bookmark->getErrors()));
                 }
             }
         }
     }
     if (sizeof($va_errors)) {
         if ($vb_web_set_transaction) {
             $o_trans->rollback();
         }
     } else {
         if ($vb_web_set_transaction) {
             $o_trans->commit();
         }
     }
     return $va_errors;
 }
 /**
  *
  */
 public function removeBookmark($pn_bookmark_id, $pn_folder_id = null, $pn_user_id = null)
 {
     if (!($vn_folder_id = $this->_getFolderID($pn_folder_id, $pn_user_id))) {
         return false;
     }
     $t_bookmark = new ca_bookmarks($pn_bookmark_id);
     if ($t_bookmark->get('folder_id') != $vn_folder_id) {
         return false;
     }
     $t_bookmark->setMode(ACCESS_WRITE);
     $t_bookmark->delete();
     if ($t_bookmark->numErrors()) {
         $this->errors = $t_bookmark->errors;
         return false;
     }
     return true;
 }