Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\content_moderation\ParamConverter;
Chris@0: 
Chris@0: use Drupal\Core\Entity\EntityInterface;
Chris@0: use Drupal\Core\Entity\EntityManagerInterface;
Chris@0: use Drupal\Core\ParamConverter\EntityConverter;
Chris@0: use Drupal\Core\TypedData\TranslatableInterface;
Chris@0: use Drupal\content_moderation\ModerationInformationInterface;
Chris@0: use Symfony\Component\Routing\Route;
Chris@0: 
Chris@0: /**
Chris@0:  * Defines a class for making sure the edit-route loads the current draft.
Chris@0:  */
Chris@0: class EntityRevisionConverter extends EntityConverter {
Chris@0: 
Chris@0:   /**
Chris@0:    * Moderation information service.
Chris@0:    *
Chris@0:    * @var \Drupal\content_moderation\ModerationInformationInterface
Chris@0:    */
Chris@0:   protected $moderationInformation;
Chris@0: 
Chris@0:   /**
Chris@0:    * EntityRevisionConverter constructor.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
Chris@0:    *   The entity manager, needed by the parent class.
Chris@0:    * @param \Drupal\content_moderation\ModerationInformationInterface $moderation_info
Chris@0:    *   The moderation info utility service.
Chris@0:    */
Chris@0:   public function __construct(EntityManagerInterface $entity_manager, ModerationInformationInterface $moderation_info) {
Chris@0:     parent::__construct($entity_manager);
Chris@0:     $this->moderationInformation = $moderation_info;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function applies($definition, $name, Route $route) {
Chris@0:     return $this->hasPendingRevisionFlag($definition) || $this->isEditFormPage($route);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Determines if the route definition includes a pending revision flag.
Chris@0:    *
Chris@0:    * This is a custom flag defined by the Content Moderation module to load
Chris@0:    * pending revisions rather than the default revision on a given route.
Chris@0:    *
Chris@0:    * @param array $definition
Chris@0:    *   The parameter definition provided in the route options.
Chris@0:    *
Chris@0:    * @return bool
Chris@0:    *   TRUE if the pending revision flag is set, FALSE otherwise.
Chris@0:    */
Chris@0:   protected function hasPendingRevisionFlag(array $definition) {
Chris@0:     return (isset($definition['load_pending_revision']) && $definition['load_pending_revision']);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Determines if a given route is the edit-form for an entity.
Chris@0:    *
Chris@0:    * @param \Symfony\Component\Routing\Route $route
Chris@0:    *   The route definition.
Chris@0:    *
Chris@0:    * @return bool
Chris@0:    *   Returns TRUE if the route is the edit form of an entity, FALSE otherwise.
Chris@0:    */
Chris@0:   protected function isEditFormPage(Route $route) {
Chris@0:     if ($default = $route->getDefault('_entity_form')) {
Chris@0:       // If no operation is provided, use 'default'.
Chris@0:       $default .= '.default';
Chris@0:       list($entity_type_id, $operation) = explode('.', $default);
Chris@0:       if (!$this->entityManager->hasDefinition($entity_type_id)) {
Chris@0:         return FALSE;
Chris@0:       }
Chris@0:       $entity_type = $this->entityManager->getDefinition($entity_type_id);
Chris@0:       return $operation == 'edit' && $entity_type && $entity_type->isRevisionable();
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function convert($value, $definition, $name, array $defaults) {
Chris@0:     $entity = parent::convert($value, $definition, $name, $defaults);
Chris@0: 
Chris@0:     if ($entity && $this->moderationInformation->isModeratedEntity($entity) && !$this->moderationInformation->isLatestRevision($entity)) {
Chris@0:       $entity_type_id = $this->getEntityTypeFromDefaults($definition, $name, $defaults);
Chris@0:       $latest_revision = $this->moderationInformation->getLatestRevision($entity_type_id, $value);
Chris@0: 
Chris@0:       if ($latest_revision instanceof EntityInterface) {
Chris@0:         // If the entity type is translatable, ensure we return the proper
Chris@0:         // translation object for the current context.
Chris@0:         if ($entity instanceof TranslatableInterface) {
Chris@0:           $latest_revision = $this->entityManager->getTranslationFromContext($latest_revision, NULL, ['operation' => 'entity_upcast']);
Chris@0:         }
Chris@0:         $entity = $latest_revision;
Chris@0:       }
Chris@0:     }
Chris@0: 
Chris@0:     return $entity;
Chris@0:   }
Chris@0: 
Chris@0: }