/**
  * @see	\wcf\data\ISortableAction::updatePosition()
  */
 public function updatePosition()
 {
     $sql = "UPDATE\twcf" . WCF_N . "_page_menu_item\n\t\t\tSET\tparentMenuItem = ?,\n\t\t\t\tshowOrder = ?\n\t\t\tWHERE\tmenuItemID = ?";
     $statement = WCF::getDB()->prepareStatement($sql);
     WCF::getDB()->beginTransaction();
     foreach ($this->parameters['data']['structure'] as $parentMenuItemID => $menuItems) {
         foreach ($menuItems as $showOrder => $menuItemID) {
             $statement->execute(array($parentMenuItemID ? $this->menuItems[$parentMenuItemID]->menuItem : '', $showOrder + 1, $menuItemID));
         }
     }
     WCF::getDB()->commitTransaction();
     // update landing page
     if ($this->parameters['menuPosition'] == 'header') {
         PageMenuItemEditor::updateLandingPage();
     }
 }
	/**
	 * @see	wcf\system\package\plugin\AbstractXMLPackageInstallationPlugin::cleanup()
	 */
	protected function cleanup() {
		PageMenuItemEditor::updateLandingPage();
	}