Ojs\JournalBundle\Controller\JournalPageController::deleteAction PHP Method

    public function deleteAction(Request $request, JournalPage $entity)
    {
        $journal = $this->get('ojs.journal_service')->getSelectedJournal();
        $dispatcher = $this->get('event_dispatcher');
        if (!$this->isGranted('DELETE', $journal, 'pages')) {
            throw new AccessDeniedException("You are not authorized for this page!");
        }
        $em = $this->getDoctrine()->getManager();
        $csrf = $this->get('security.csrf.token_manager');
        $token = $csrf->getToken('ojs_journal_page' . $entity->getId());
        if ($token != $request->get('_token')) {
            throw new TokenNotFoundException("Token not found!");
        }
        $event = new JournalItemEvent($entity);
        $dispatcher->dispatch(JournalPageEvents::PRE_DELETE, $event);
        $this->get('ojs_core.delete.service')->check($entity);
        $em->remove($entity);
        $em->flush();
        $event = new JournalEvent($journal);
        $dispatcher->dispatch(JournalPageEvents::POST_DELETE, $event);
        if ($event->getResponse()) {
            return $event->getResponse();
        }
        $this->successFlashBag('successful.remove');
        return $this->redirectToRoute('ojs_journal_page_index', ['journalId' => $journal->getId()]);
    }