Chris@14: <?php
Chris@14: 
Chris@14: namespace Drupal\content_moderation\Routing;
Chris@14: 
Chris@14: use Drupal\Core\Entity\EntityTypeManagerInterface;
Chris@14: use Drupal\Core\Routing\RouteSubscriberBase;
Chris@14: use Drupal\Core\Routing\RoutingEvents;
Chris@14: use Drupal\workflows\Entity\Workflow;
Chris@14: use Symfony\Component\Routing\Route;
Chris@14: use Symfony\Component\Routing\RouteCollection;
Chris@14: 
Chris@14: /**
Chris@14:  * Subscriber for moderated revisionable entity forms.
Chris@14:  *
Chris@14:  * @internal
Chris@14:  *   There is ongoing discussion about how pending revisions should behave.
Chris@14:  *   The logic enabling pending revision support is likely to change once a
Chris@14:  *   decision is made.
Chris@14:  *
Chris@14:  * @see https://www.drupal.org/node/2940575
Chris@14:  */
Chris@14: class ContentModerationRouteSubscriber extends RouteSubscriberBase {
Chris@14: 
Chris@14:   /**
Chris@14:    * The entity type manager.
Chris@14:    *
Chris@14:    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
Chris@14:    */
Chris@14:   protected $entityTypeManager;
Chris@14: 
Chris@14:   /**
Chris@14:    * An associative array of moderated entity types keyed by ID.
Chris@14:    *
Chris@14:    * @var \Drupal\Core\Entity\ContentEntityTypeInterface[]
Chris@14:    */
Chris@14:   protected $moderatedEntityTypes;
Chris@14: 
Chris@14:   /**
Chris@14:    * ContentModerationRouteSubscriber constructor.
Chris@14:    *
Chris@14:    * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
Chris@14:    *   The entity type manager.
Chris@14:    */
Chris@14:   public function __construct(EntityTypeManagerInterface $entity_type_manager) {
Chris@14:     $this->entityTypeManager = $entity_type_manager;
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * {@inheritdoc}
Chris@14:    */
Chris@14:   protected function alterRoutes(RouteCollection $collection) {
Chris@14:     foreach ($collection as $route) {
Chris@14:       $this->setLatestRevisionFlag($route);
Chris@14:     }
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * Ensure revisionable entities load the latest revision on entity forms.
Chris@14:    *
Chris@14:    * @param \Symfony\Component\Routing\Route $route
Chris@14:    *   The route object.
Chris@14:    */
Chris@14:   protected function setLatestRevisionFlag(Route $route) {
Chris@14:     if (!$entity_form = $route->getDefault('_entity_form')) {
Chris@14:       return;
Chris@14:     }
Chris@14:     // Only set the flag on entity types which are revisionable.
Chris@14:     list($entity_type) = explode('.', $entity_form, 2);
Chris@14:     if (!isset($this->getModeratedEntityTypes()[$entity_type]) || !$this->getModeratedEntityTypes()[$entity_type]->isRevisionable()) {
Chris@14:       return;
Chris@14:     }
Chris@14:     $parameters = $route->getOption('parameters') ?: [];
Chris@14:     foreach ($parameters as &$parameter) {
Chris@18:       if (isset($parameter['type']) && $parameter['type'] === 'entity:' . $entity_type && !isset($parameter['load_latest_revision'])) {
Chris@14:         $parameter['load_latest_revision'] = TRUE;
Chris@14:       }
Chris@14:     }
Chris@14:     $route->setOption('parameters', $parameters);
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * Returns the moderated entity types.
Chris@14:    *
Chris@14:    * @return \Drupal\Core\Entity\ContentEntityTypeInterface[]
Chris@14:    *   An associative array of moderated entity types keyed by ID.
Chris@14:    */
Chris@14:   protected function getModeratedEntityTypes() {
Chris@14:     if (!isset($this->moderatedEntityTypes)) {
Chris@14:       $entity_types = $this->entityTypeManager->getDefinitions();
Chris@14:       /** @var \Drupal\workflows\WorkflowInterface $workflow */
Chris@14:       foreach (Workflow::loadMultipleByType('content_moderation') as $workflow) {
Chris@14:         /** @var \Drupal\content_moderation\Plugin\WorkflowType\ContentModeration $plugin */
Chris@14:         $plugin = $workflow->getTypePlugin();
Chris@14:         foreach ($plugin->getEntityTypes() as $entity_type_id) {
Chris@14:           $this->moderatedEntityTypes[$entity_type_id] = $entity_types[$entity_type_id];
Chris@14:         }
Chris@14:       }
Chris@14:     }
Chris@14:     return $this->moderatedEntityTypes;
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * {@inheritdoc}
Chris@14:    */
Chris@14:   public static function getSubscribedEvents() {
Chris@14:     $events = parent::getSubscribedEvents();
Chris@14:     // This needs to run after that EntityResolverManager has set the route
Chris@14:     // entity type.
Chris@14:     $events[RoutingEvents::ALTER] = ['onAlterRoutes', -200];
Chris@14:     return $events;
Chris@14:   }
Chris@14: 
Chris@14: }