/**
  * confirm delete files
  *
  * @access public
  * 
  */
 public function confirmDeleteFiles()
 {
     if (!isset($_POST['file_id'])) {
         ilUtil::sendFailure($this->lng->txt('select_one'));
         $this->showFiles();
         return false;
     }
     include_once "Services/Utilities/classes/class.ilConfirmationGUI.php";
     $c_gui = new ilConfirmationGUI();
     // set confirm/cancel commands
     $c_gui->setFormAction($this->ctrl->getFormAction($this, "deleteFiles"));
     $c_gui->setHeaderText($this->lng->txt("md_adv_delete_files_sure"));
     $c_gui->setCancel($this->lng->txt("cancel"), "showFiles");
     $c_gui->setConfirm($this->lng->txt("confirm"), "deleteFiles");
     include_once 'Services/AdvancedMetaData/classes/class.ilAdvancedMDRecordExportFiles.php';
     $files = new ilAdvancedMDRecordExportFiles();
     $file_data = $files->readFilesInfo();
     // add items to delete
     foreach ($_POST["file_id"] as $file_id) {
         $info = $file_data[$file_id];
         $c_gui->addItem("file_id[]", $file_id, is_array($info['name']) ? implode(',', $info['name']) : 'No Records');
     }
     $this->tpl->setContent($c_gui->getHTML());
 }