function index($siteid, $slug, Request $request, Application $app)
 {
     global $CONFIG;
     $this->build($siteid, $slug, $request, $app);
     $form = $app['form.factory']->create(new ActionForm());
     if ('POST' == $request->getMethod()) {
         $form->bind($request);
         if ($form->isValid()) {
             $data = $form->getData();
             $action = new ActionParser($data['action']);
             if ($action->getCommand() == 'delete' && !$this->parameters['group']->getIsDeleted()) {
                 $gr = new GroupRepository();
                 $gr->delete($this->parameters['group'], $app['currentUser']);
                 return $app->redirect('/sysadmin/site/' . $this->parameters['site']->getId() . '/group/' . $this->parameters['group']->getSlug());
             } else {
                 if ($action->getCommand() == 'undelete' && $this->parameters['group']->getIsDeleted()) {
                     $this->parameters['group']->setIsDeleted(false);
                     $gr = new GroupRepository();
                     $gr->undelete($this->parameters['group'], $app['currentUser']);
                     return $app->redirect('/sysadmin/site/' . $this->parameters['site']->getId() . '/group/' . $this->parameters['group']->getSlug());
                 } else {
                     if ($action->getCommand() == 'isduplicateof') {
                         $gr = new GroupRepository();
                         $originalGroup = $gr->loadBySlug($this->parameters['site'], $action->getParam(0));
                         if ($originalGroup && $originalGroup->getId() != $this->parameters['group']->getId()) {
                             $gr->markDuplicate($this->parameters['group'], $originalGroup, $app['currentUser']);
                             return $app->redirect('/sysadmin/site/' . $this->parameters['site']->getId() . '/group/' . $this->parameters['group']->getSlug());
                         }
                     } else {
                         if ($action->getCommand() == 'purge' && $CONFIG->sysAdminExtraPurgeGroupPassword && $CONFIG->sysAdminExtraPurgeGroupPassword == $action->getParam(0)) {
                             $gr = new GroupRepository();
                             $gr->purge($this->parameters['group']);
                             return $app->redirect('/sysadmin/site/' . $this->parameters['site']->getId() . '/group/');
                         }
                     }
                 }
             }
         }
     }
     $this->parameters['form'] = $form->createView();
     return $app['twig']->render('sysadmin/group/index.html.twig', $this->parameters);
 }