/**
  * Delete files
  */
 function delete()
 {
     global $ilCtrl;
     foreach ($_POST["file"] as $file) {
         $file = explode(":", $file);
         include_once "./Services/Export/classes/class.ilExport.php";
         $export_dir = ilExport::_getExportDirectory($this->obj->getId(), str_replace("..", "", $file[0]), $this->obj->getType());
         $exp_file = $export_dir . "/" . str_replace("..", "", $file[1]);
         $exp_dir = $export_dir . "/" . substr($file[1], 0, strlen($file[1]) - 4);
         if (@is_file($exp_file)) {
             unlink($exp_file);
         }
         if (@is_dir($exp_dir)) {
             ilUtil::delDir($exp_dir);
         }
         // delete entry in database
         include_once './Services/Export/classes/class.ilExportFileInfo.php';
         $info = new ilExportFileInfo($this->obj->getId(), $file[0], $file[1]);
         $info->delete();
     }
     $ilCtrl->redirect($this, "listExportFiles");
 }