public function addAdditionalFolderAction()
    {
        // Check current user authorization
        if (null !== $response = $this->checkAuth($this->resourceCode, array(), AccessManager::UPDATE)) {
            return $response;
        }

        $folder_id = \intval($this->getRequest()->request->get('additional_folder_id'));

        if ($folder_id > 0) {
            $event = new ContentAddFolderEvent(
                $this->getExistingObject(),
                $folder_id
            );

            try {
                $this->dispatch(TheliaEvents::CONTENT_ADD_FOLDER, $event);
            } catch (\Exception $e) {
                return $this->errorPage($e);
            }
        }

        return $this->redirectToEditionTemplate();
    }