src/Form/EventListener/ReCaptchaValidationListener.php line 36

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  1. <?php
  3. namespace App\Form\EventListener;
  5. use ReCaptcha\ReCaptcha;
  6. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  7. use Symfony\Component\Form\FormError;
  8. use Symfony\Component\Form\FormEvent;
  9. use Symfony\Component\Form\FormEvents;
  10. use Symfony\Component\HttpFoundation\Request;
  12. class ReCaptchaValidationListener implements EventSubscriberInterface
  13. {
  14. private $reCaptcha;
  15. private $invalidMessage = 'The captcha is invalid.';
  17. public function __construct(ReCaptcha $reCaptcha)
  18. {
  19. $this->reCaptcha = $reCaptcha;
  20. }
  22. public static function getSubscribedEvents()
  23. {
  24. return [
  25. FormEvents::POST_SUBMIT => 'onPostSubmit',
  26. ];
  27. }
  29. public function setInvalidMessage($message)
  30. {
  31. $this->invalidMessage = $message;
  33. return $this;
  34. }
  36. public function onPostSubmit(FormEvent $event)
  37. {
  38. $request = Request::createFromGlobals();
  40. $result = $this->reCaptcha
  41. ->setExpectedHostname($request->getHost())
  42. ->verify($request->request->get('g-recaptcha-response'), $request->getClientIp());
  44. if (!$result->isSuccess()) {
  45. $event->getForm()->addError(new FormError($this->invalidMessage));
  46. }
  47. }
  48. }