Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\big_pipe\EventSubscriber;
Chris@0: 
Chris@0: use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@0: use Drupal\Core\Routing\RoutingEvents;
Chris@0: use Drupal\Core\Routing\RouteBuildEvent;
Chris@0: 
Chris@0: /**
Chris@0:  * Sets the '_no_big_pipe' option on select routes.
Chris@0:  */
Chris@0: class NoBigPipeRouteAlterSubscriber implements EventSubscriberInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * Alters select routes to have the '_no_big_pipe' option.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Routing\RouteBuildEvent $event
Chris@0:    *   The event to process.
Chris@0:    */
Chris@0:   public function onRoutingRouteAlterSetNoBigPipe(RouteBuildEvent $event) {
Chris@0:     $no_big_pipe_routes = [
Chris@0:       // The batch system uses a <meta> refresh to work without JavaScript.
Chris@0:       'system.batch_page.html',
Chris@0:       // When a user would install the BigPipe module using a browser and with
Chris@0:       // JavaScript disabled, the first response contains the status messages
Chris@0:       // for installing a module, but then the BigPipe no-JS redirect occurs,
Chris@0:       // which then causes the user to not see those status messages.
Chris@0:       // @see https://www.drupal.org/node/2469431#comment-10901944
Chris@0:       'system.modules_list',
Chris@0:     ];
Chris@0: 
Chris@0:     $route_collection = $event->getRouteCollection();
Chris@0:     foreach ($no_big_pipe_routes as $excluded_route) {
Chris@0:       if ($route = $route_collection->get($excluded_route)) {
Chris@0:         $route->setOption('_no_big_pipe', TRUE);
Chris@0:       }
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function getSubscribedEvents() {
Chris@0:     $events[RoutingEvents::ALTER][] = ['onRoutingRouteAlterSetNoBigPipe'];
Chris@0:     return $events;
Chris@0:   }
Chris@0: 
Chris@0: }