private function handle_upload()
 {
     $id = null;
     if (isset($_FILES['Filedata']) && !empty($_FILES['Filedata']['tmp_name']) && !empty($_POST['title'])) {
         $FileAPI = new FileAPI(array('pdf'));
         try {
             $imported_filename = $FileAPI->import($_FILES['Filedata']['tmp_name'], $_FILES['Filedata']['name']);
             //Upload war erfolgreich und die Datei wurde korrekt abgelegt.
             //$id = YumpuEpaper_repository::create($imported_filename, $_POST['title']);
             $status = "success";
         } catch (FileAPI_exception $e) {
             $status = "error";
             $message = $e->getMessage();
         } catch (YumpuEpaper_repository_exception $e) {
             /**
              * Wenn möglich sollten wir die importierte Datei direkt entfernen.
              */
             $FileAPI->delete($_FILES['yc_file']['name']);
             $status = "error";
             $message = $e->getMessage();
         }
     } else {
         $status = "error";
         $message = "no input file";
     }
     $upload_response = json_encode(array('status' => $status, 'message' => $message, 'id' => $id, 'filename' => addslashes($imported_filename)));
     $HB = new HtmlBuilder('admin_upload_response.php', $this->plugin_path . DIRECTORY_SEPARATOR . 'templates' . DIRECTORY_SEPARATOR);
     $HB->assign('upload_response', $upload_response);
     echo $HB->get_data();
 }
 private function display()
 {
     if (WP_Yumpu::$API_TOKEN === null) {
         echo '';
         return;
     }
     $HB = new HtmlBuilder('admin_files.php', $this->plugin_path . DIRECTORY_SEPARATOR . 'templates' . DIRECTORY_SEPARATOR);
     $yumpu_action = isset($_REQUEST['yumpu_action']) ? $_REQUEST['yumpu_action'] : null;
     switch ($yumpu_action) {
         case "create_epaper":
             if (isset($_FILES['yc_file']) && !empty($_FILES['yc_file']['tmp_name']) && !empty($_POST['yc_title'])) {
                 $FileAPI = new FileAPI(array('pdf'));
                 try {
                     $imported_filename = $FileAPI->import($_FILES['yc_file']['tmp_name'], $_FILES['yc_file']['name']);
                     //Upload war erfolgreich und die Datei wurde korrekt abgelegt.
                     YumpuEpaper_repository::create($imported_filename, $_POST['yc_title'], $_POST['yc_description']);
                     $HB->assign('yumpu_success_message', 'upload successfull');
                 } catch (FileAPI_exception $e) {
                     $HB->assign('yumpu_error_message', $e->getMessage());
                 } catch (YumpuEpaper_repository_exception $e) {
                     /**
                      * Wenn möglich sollten wir die importierte Datei direkt entfernen.
                      */
                     $FileAPI->delete($_FILES['yc_file']['name']);
                     $HB->assign('yumpu_error_message', $e->getMessage());
                 }
             } else {
                 $HB->assign('yumpu_error_message', 'no input file or title missing');
             }
             break;
     }
     /**
      * Hier Liste der gesmaten Dokumenten auflisten.
      */
     $ePapers = YumpuEpaper_repository::getAll();
     $HB->assign('epapers', $ePapers);
     echo $HB->get_data();
 }
 private function display()
 {
     $HB = new HtmlBuilder('admin_settings.php', $this->plugin_path . DIRECTORY_SEPARATOR . 'templates' . DIRECTORY_SEPARATOR);
     $HB->assign('API_TOKEN', WP_Yumpu::$API_TOKEN);
     echo $HB->get_data();
 }