Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\EventSubscriber;
Chris@0: 
Chris@0: use Drupal\Core\Entity\EntityManagerInterface;
Chris@0: use Drupal\Core\Routing\RouteBuildEvent;
Chris@0: use Drupal\Core\Routing\RoutingEvents;
Chris@0: use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@0: use Symfony\Component\Routing\RouteCollection;
Chris@0: 
Chris@0: /**
Chris@0:  * Ensures that routes can be provided by entity types.
Chris@0:  */
Chris@0: class EntityRouteProviderSubscriber implements EventSubscriberInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The entity manager.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Entity\EntityManagerInterface
Chris@0:    */
Chris@0:   protected $entityManager;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a new EntityRouteProviderSubscriber instance.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
Chris@0:    *   The entity manager.
Chris@0:    */
Chris@0:   public function __construct(EntityManagerInterface $entity_manager) {
Chris@0:     $this->entityManager = $entity_manager;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Provides routes on route rebuild time.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Routing\RouteBuildEvent $event
Chris@0:    *   The route build event.
Chris@0:    */
Chris@0:   public function onDynamicRouteEvent(RouteBuildEvent $event) {
Chris@0:     $route_collection = $event->getRouteCollection();
Chris@0:     foreach ($this->entityManager->getDefinitions() as $entity_type) {
Chris@0:       if ($entity_type->hasRouteProviders()) {
Chris@0:         foreach ($this->entityManager->getRouteProviders($entity_type->id()) as $route_provider) {
Chris@0:           // Allow to both return an array of routes or a route collection,
Chris@0:           // like route_callbacks in the routing.yml file.
Chris@0: 
Chris@0:           $routes = $route_provider->getRoutes($entity_type);
Chris@0:           if ($routes instanceof RouteCollection) {
Chris@0:             $routes = $routes->all();
Chris@0:           }
Chris@0:           foreach ($routes as $route_name => $route) {
Chris@0:             // Don't override existing routes.
Chris@0:             if (!$route_collection->get($route_name)) {
Chris@0:               $route_collection->add($route_name, $route);
Chris@0:             }
Chris@0:           }
Chris@0:         }
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::DYNAMIC][] = ['onDynamicRouteEvent'];
Chris@0:     return $events;
Chris@0:   }
Chris@0: 
Chris@0: }