private function getDropZoneHiddenDirectory(Dropzone $dropzone)
{
$em = $this->getDoctrine()->getManager();
$hiddenDirectory = $dropzone->getHiddenDirectory();
if ($hiddenDirectory === null) {
$hiddenDirectory = new Directory();
$name = $this->get('translator')->trans('Hidden folder for "%dropzoneName%"', array('%dropzoneName%' => $dropzone->getResourceNode()->getName()), 'innova_collecticiel');
$hiddenDirectory->setName($name);
$role = $this->getDoctrine()->getRepository('ClarolineCoreBundle:Role')->findManagerRole($dropzone->getResourceNode()->getWorkspace());
$resourceManager = $this->get('claroline.manager.resource_manager');
$resourceManager->create($hiddenDirectory, $resourceManager->getResourceTypeByName('directory'), $dropzone->getResourceNode()->getCreator(), $dropzone->getResourceNode()->getWorkspace(), $dropzone->getResourceNode()->getParent(), null, array('ROLE_WS_MANAGER' => array('open' => true, 'export' => true, 'create' => array(), 'role' => $role)));
$dropzone->setHiddenDirectory($hiddenDirectory->getResourceNode());
$em->persist($dropzone);
$em->flush();
}
return $dropzone->getHiddenDirectory();
}