Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\EventSubscriber;
Chris@0: 
Chris@0: use Drupal\Core\Render\HtmlResponse;
Chris@0: use Drupal\Core\Render\AttachmentsResponseProcessorInterface;
Chris@0: use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
Chris@0: use Symfony\Component\HttpKernel\KernelEvents;
Chris@0: use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Response subscriber to handle HTML responses.
Chris@0:  */
Chris@0: class HtmlResponseSubscriber implements EventSubscriberInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The HTML response attachments processor service.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Render\AttachmentsResponseProcessorInterface
Chris@0:    */
Chris@0:   protected $htmlResponseAttachmentsProcessor;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a HtmlResponseSubscriber object.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Render\AttachmentsResponseProcessorInterface $html_response_attachments_processor
Chris@0:    *   The HTML response attachments processor service.
Chris@0:    */
Chris@0:   public function __construct(AttachmentsResponseProcessorInterface $html_response_attachments_processor) {
Chris@0:     $this->htmlResponseAttachmentsProcessor = $html_response_attachments_processor;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Processes attachments for HtmlResponse responses.
Chris@0:    *
Chris@0:    * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
Chris@0:    *   The event to process.
Chris@0:    */
Chris@0:   public function onRespond(FilterResponseEvent $event) {
Chris@0:     $response = $event->getResponse();
Chris@0:     if (!$response instanceof HtmlResponse) {
Chris@0:       return;
Chris@0:     }
Chris@0: 
Chris@0:     $event->setResponse($this->htmlResponseAttachmentsProcessor->processAttachments($response));
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function getSubscribedEvents() {
Chris@0:     $events[KernelEvents::RESPONSE][] = ['onRespond'];
Chris@0:     return $events;
Chris@0:   }
Chris@0: 
Chris@0: }