vendor/contao/core-bundle/src/EventListener/RefererIdListener.php line 48

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  1. <?php
  3. declare(strict_types=1);
  5. /*
  6.  * This file is part of Contao.
  7.  *
  8.  * (c) Leo Feyer
  9.  *
  10.  * @license LGPL-3.0-or-later
  11.  */
  13. namespace Contao\CoreBundle\EventListener;
  15. use Contao\CoreBundle\Routing\ScopeMatcher;
  16. use Symfony\Component\HttpKernel\Event\RequestEvent;
  17. use Symfony\Component\Security\Csrf\TokenGenerator\TokenGeneratorInterface;
  19. /**
  20.  * @internal
  21.  */
  22. class RefererIdListener
  23. {
  24.     /**
  25.      * @var TokenGeneratorInterface
  26.      */
  27.     private $tokenGenerator;
  29.     /**
  30.      * @var ScopeMatcher
  31.      */
  32.     private $scopeMatcher;
  34.     /**
  35.      * @var string
  36.      */
  37.     private $token;
  39.     public function __construct(TokenGeneratorInterface $tokenGenerator, ScopeMatcher $scopeMatcher)
  40.     {
  41.         $this->tokenGenerator = $tokenGenerator;
  42.         $this->scopeMatcher = $scopeMatcher;
  43.     }
  45.     /**
  46.      * Adds the referer ID to the request.
  47.      */
  48.     public function __invoke(RequestEvent $event): void
  49.     {
  50.         if (!$this->scopeMatcher->isBackendMasterRequest($event)) {
  51.             return;
  52.         }
  54.         $request = $event->getRequest();
  56.         if (null === $this->token) {
  57.             $this->token = $this->tokenGenerator->generateToken();
  58.         }
  60.         $request->attributes->set('_contao_referer_id', $this->token);
  61.     }
  62. }