Chris@18: <?php
Chris@18: 
Chris@18: namespace Drupal\media\EventSubscriber;
Chris@18: 
Chris@18: use Drupal\Core\Cache\CacheTagsInvalidatorInterface;
Chris@18: use Drupal\Core\Config\ConfigCrudEvent;
Chris@18: use Drupal\Core\Config\ConfigEvents;
Chris@18: use Drupal\Core\Entity\EntityTypeManagerInterface;
Chris@18: use Drupal\Core\Routing\RouteBuilderInterface;
Chris@18: use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@18: 
Chris@18: /**
Chris@18:  * Listens to the config save event for media.settings.
Chris@18:  */
Chris@18: class MediaConfigSubscriber implements EventSubscriberInterface {
Chris@18: 
Chris@18:   /**
Chris@18:    * The route builder.
Chris@18:    *
Chris@18:    * @var \Drupal\Core\Routing\RouteBuilderInterface
Chris@18:    */
Chris@18:   protected $routeBuilder;
Chris@18: 
Chris@18:   /**
Chris@18:    * The cache tags invalidator.
Chris@18:    *
Chris@18:    * @var \Drupal\Core\Cache\CacheTagsInvalidatorInterface
Chris@18:    */
Chris@18:   protected $cacheTagsInvalidator;
Chris@18: 
Chris@18:   /**
Chris@18:    * The entity type manager.
Chris@18:    *
Chris@18:    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
Chris@18:    */
Chris@18:   protected $entityTypeManager;
Chris@18: 
Chris@18:   /**
Chris@18:    * Constructs the MediaConfigSubscriber.
Chris@18:    *
Chris@18:    * @param \Drupal\Core\Routing\RouteBuilderInterface $router_builder
Chris@18:    *   The route builder.
Chris@18:    * @param \Drupal\Core\Cache\CacheTagsInvalidatorInterface $cache_tags_invalidator
Chris@18:    *   The cache tags invalidator.
Chris@18:    * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
Chris@18:    *   The entity type manager.
Chris@18:    */
Chris@18:   public function __construct(RouteBuilderInterface $router_builder, CacheTagsInvalidatorInterface $cache_tags_invalidator, EntityTypeManagerInterface $entity_type_manager) {
Chris@18:     $this->routeBuilder = $router_builder;
Chris@18:     $this->cacheTagsInvalidator = $cache_tags_invalidator;
Chris@18:     $this->entityTypeManager = $entity_type_manager;
Chris@18:   }
Chris@18: 
Chris@18:   /**
Chris@18:    * Updates entity type definitions and ensures routes are rebuilt when needed.
Chris@18:    *
Chris@18:    * @param \Drupal\Core\Config\ConfigCrudEvent $event
Chris@18:    *   The ConfigCrudEvent to process.
Chris@18:    */
Chris@18:   public function onSave(ConfigCrudEvent $event) {
Chris@18:     $saved_config = $event->getConfig();
Chris@18:     if ($saved_config->getName() === 'media.settings' && $event->isChanged('standalone_url')) {
Chris@18:       $this->cacheTagsInvalidator->invalidateTags([
Chris@18:         // The configuration change triggers entity type definition changes,
Chris@18:         // which in turn triggers routes to appear or disappear.
Chris@18:         // @see media_entity_type_alter()
Chris@18:         'entity_types',
Chris@18:         // The 'rendered' cache tag needs to be explicitly invalidated to ensure
Chris@18:         // that all links to Media entities are re-rendered. Ideally, this would
Chris@18:         // not be necessary; invalidating the 'entity_types' cache tag should be
Chris@18:         // sufficient. But that cache tag would then need to be on nearly
Chris@18:         // everything, resulting in excessive complexity. We prefer pragmatism.
Chris@18:         'rendered',
Chris@18:       ]);
Chris@18:       // @todo Remove this when invalidating the 'entity_types' cache tag is
Chris@18:       // respected by the entity type plugin manager. See
Chris@18:       // https://www.drupal.org/project/drupal/issues/3001284 and
Chris@18:       // https://www.drupal.org/project/drupal/issues/3013659.
Chris@18:       $this->entityTypeManager->clearCachedDefinitions();
Chris@18:       $this->routeBuilder->setRebuildNeeded();
Chris@18:     }
Chris@18:   }
Chris@18: 
Chris@18:   /**
Chris@18:    * {@inheritdoc}
Chris@18:    */
Chris@18:   public static function getSubscribedEvents() {
Chris@18:     $events[ConfigEvents::SAVE][] = ['onSave'];
Chris@18:     return $events;
Chris@18:   }
Chris@18: 
Chris@18: }