src/EventSubscriber/CommentNotificationSubscriber.php line 47

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  1. <?php
  3. /*
  4.  * This file is part of the Symfony package.
  5.  *
  6.  * (c) Fabien Potencier <fabien@symfony.com>
  7.  *
  8.  * For the full copyright and license information, please view the LICENSE
  9.  * file that was distributed with this source code.
  10.  */
  12. namespace App\EventSubscriber;
  14. use App\Entity\Comment;
  15. use App\Events\CommentCreatedEvent;
  16. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  17. use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
  18. use Symfony\Contracts\Translation\TranslatorInterface;
  20. /**
  21.  * Notifies post's author about new comments.
  22.  *
  23.  * @author Oleg Voronkovich <oleg-voronkovich@yandex.ru>
  24.  */
  25. class CommentNotificationSubscriber implements EventSubscriberInterface
  26. {
  27.     private $mailer;
  28.     private $translator;
  29.     private $urlGenerator;
  30.     private $sender;
  32.     public function __construct(\Swift_Mailer $mailer, UrlGeneratorInterface $urlGenerator, TranslatorInterface $translator, $sender)
  33.     {
  34.         $this->mailer = $mailer;
  35.         $this->urlGenerator = $urlGenerator;
  36.         $this->translator = $translator;
  37.         $this->sender = $sender;
  38.     }
  40.     public static function getSubscribedEvents(): array
  41.     {
  42.         return [
  43.             CommentCreatedEvent::class => 'onCommentCreated',
  44.         ];
  45.     }
  47.     public function onCommentCreated(CommentCreatedEvent $event): void
  48.     {
  49.         /** @var Comment $comment */
  50.         $comment = $event->getComment();
  51.         $post = $comment->getPost();
  53.         $linkToPost = $this->urlGenerator->generate('blog_post', [
  54.             'slug' => $post->getSlug(),
  55.             '_fragment' => 'comment_'.$comment->getId(),
  56.         ], UrlGeneratorInterface::ABSOLUTE_URL);
  58.         $subject = $this->translator->trans('notification.comment_created');
  59.         $body = $this->translator->trans('notification.comment_created.description', [
  60.             '%title%' => $post->getTitle(),
  61.             '%link%' => $linkToPost,
  62.         ]);
  64.         // Symfony uses a library called SwiftMailer to send emails. That's why
  65.         // email messages are created instantiating a Swift_Message class.
  66.         // See https://symfony.com/doc/current/email.html#sending-emails
  67.         $message = (new \Swift_Message())
  68.             ->setSubject($subject)
  69.             ->setTo($post->getAuthor()->getEmail())
  70.             ->setFrom($this->sender)
  71.             ->setBody($body, 'text/html')
  72.         ;
  74.         // In config/packages/dev/swiftmailer.yaml the 'disable_delivery' option is set to 'true'.
  75.         // That's why in the development environment you won't actually receive any email.
  76.         // However, you can inspect the contents of those unsent emails using the debug toolbar.
  77.         // See https://symfony.com/doc/current/email/dev_environment.html#viewing-from-the-web-debug-toolbar
  78.         $this->mailer->send($message);
  79.     }
  80. }