Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\rest\EventSubscriber;
Chris@0: 
Chris@0: use Drupal\Core\Entity\EntityTypeManagerInterface;
Chris@0: use Drupal\Core\Routing\RouteBuildEvent;
Chris@0: use Drupal\Core\Routing\RoutingEvents;
Chris@0: use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Generates a 'create' route for an entity type if it has a REST POST route.
Chris@0:  */
Chris@0: class EntityResourcePostRouteSubscriber implements EventSubscriberInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The REST resource config storage.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Entity\EntityManagerInterface
Chris@0:    */
Chris@0:   protected $resourceConfigStorage;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a new EntityResourcePostRouteSubscriber instance.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
Chris@0:    *   The entity type manager.
Chris@0:    */
Chris@0:   public function __construct(EntityTypeManagerInterface $entity_type_manager) {
Chris@0:     $this->resourceConfigStorage = $entity_type_manager->getStorage('rest_resource_config');
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: 
Chris@0:     $resource_configs = $this->resourceConfigStorage->loadMultiple();
Chris@0:     // Iterate over all REST resource config entities.
Chris@0:     foreach ($resource_configs as $resource_config) {
Chris@0:       // We only care about REST resource config entities for the
Chris@0:       // \Drupal\rest\Plugin\rest\resource\EntityResource plugin.
Chris@0:       $plugin_id = $resource_config->toArray()['plugin_id'];
Chris@0:       if (substr($plugin_id, 0, 6) !== 'entity') {
Chris@0:         continue;
Chris@0:       }
Chris@0: 
Chris@0:       $entity_type_id = substr($plugin_id, 7);
Chris@0:       $rest_post_route_name = "rest.entity.$entity_type_id.POST";
Chris@0:       if ($rest_post_route = $route_collection->get($rest_post_route_name)) {
Chris@0:         // Create a route for the 'create' link relation type for this entity
Chris@0:         // type that uses the same route definition as the REST 'POST' route
Chris@0:         // which use that entity type.
Chris@0:         // @see \Drupal\Core\Entity\Entity::toUrl()
Chris@0:         $entity_create_route_name = "entity.$entity_type_id.create";
Chris@0:         $route_collection->add($entity_create_route_name, $rest_post_route);
Chris@0:       }
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function getSubscribedEvents() {
Chris@0:     // Priority -10, to run after \Drupal\rest\Routing\ResourceRoutes, which has
Chris@0:     // priority 0.
Chris@0:     $events[RoutingEvents::DYNAMIC][] = ['onDynamicRouteEvent', -10];
Chris@0:     return $events;
Chris@0:   }
Chris@0: 
Chris@0: }