Ojs\JournalBundle\Controller\JournalPageController::sortAction PHP Метод

    public function sortAction(Request $request)
    {
        $em = $this->getDoctrine()->getManager();
        $journal = $this->get('ojs.journal_service')->getSelectedJournal();
        $pages = $em->getRepository(JournalPage::class)->findAll();
        usort($pages, function ($a, $b) {
            return $a->getPageOrder() > $b->getPageOrder();
        });
        $sortData = [];
        foreach ($pages as $page) {
            $sortData[$page->getId()] = $page->getPageOrder();
        }
        if ($request->getMethod() == 'POST' && $request->request->has('sortData')) {
            $sortData = json_decode($request->request->get('sortData'));
            foreach ($sortData as $pageId => $order) {
                foreach ($pages as $page) {
                    if ($page->getId() == $pageId) {
                        $page->setPageOrder($order);
                        $em->persist($page);
                    }
                }
            }
            $em->flush();
            $this->successFlashBag('successful.update');
            return $this->redirectToRoute('ojs_journal_page_sort', ['journalId' => $journal->getId()]);
        }
        return $this->render('OjsJournalBundle:JournalPage:sort.html.twig', ['pages' => $pages, 'jsonSortData' => json_encode($sortData)]);
    }