<?php
namespace App\Form\EventListener;
use ReCaptcha\ReCaptcha;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Form\FormError;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\HttpFoundation\Request;
class ReCaptchaValidationListener implements EventSubscriberInterface
{
private $reCaptcha;
private $invalidMessage = 'The captcha is invalid.';
public function __construct(ReCaptcha $reCaptcha)
{
$this->reCaptcha = $reCaptcha;
}
public static function getSubscribedEvents()
{
return [
FormEvents::POST_SUBMIT => 'onPostSubmit'
];
}
public function setInvalidMessage($message)
{
$this->invalidMessage = $message;
return $this;
}
public function onPostSubmit(FormEvent $event)
{
$request = Request::createFromGlobals();
$result = $this->reCaptcha
->setExpectedHostname($request->getHost())
->verify($request->request->get('g-recaptcha-response'), $request->getClientIp());
if (!$result->isSuccess()) {
$event->getForm()->addError(new FormError($this->invalidMessage));
}
}
}