Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\node\Controller;
Chris@0: 
Chris@18: use Drupal\Core\Entity\Controller\EntityViewController;
Chris@0: use Drupal\Core\Entity\EntityInterface;
Chris@18: use Drupal\Core\Entity\EntityRepositoryInterface;
Chris@18: use Drupal\Core\Entity\EntityTypeManagerInterface;
Chris@18: use Drupal\Core\Render\RendererInterface;
Chris@18: use Symfony\Component\DependencyInjection\ContainerInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Defines a controller to render a single node in preview.
Chris@0:  */
Chris@0: class NodePreviewController extends EntityViewController {
Chris@0: 
Chris@0:   /**
Chris@18:    * The entity repository service.
Chris@18:    *
Chris@18:    * @var \Drupal\Core\Entity\EntityRepositoryInterface
Chris@18:    */
Chris@18:   protected $entityRepository;
Chris@18: 
Chris@18:   /**
Chris@18:    * Creates an NodeViewController object.
Chris@18:    *
Chris@18:    * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
Chris@18:    *   The entity type manager.
Chris@18:    * @param \Drupal\Core\Render\RendererInterface $renderer
Chris@18:    *   The renderer service.
Chris@18:    * @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
Chris@18:    *   The entity repository.
Chris@18:    */
Chris@18:   public function __construct(EntityTypeManagerInterface $entity_type_manager, RendererInterface $renderer, EntityRepositoryInterface $entity_repository = NULL) {
Chris@18:     parent::__construct($entity_type_manager, $renderer);
Chris@18:     if (!$entity_repository) {
Chris@18:       @trigger_error('The entity.repository service must be passed to NodePreviewController::__construct(), it is required before Drupal 9.0.0. See https://www.drupal.org/node/2549139.', E_USER_DEPRECATED);
Chris@18:       $entity_repository = \Drupal::service('entity.repository');
Chris@18:     }
Chris@18:     $this->entityRepository = $entity_repository;
Chris@18:   }
Chris@18: 
Chris@18:   /**
Chris@18:    * {@inheritdoc}
Chris@18:    */
Chris@18:   public static function create(ContainerInterface $container) {
Chris@18:     return new static(
Chris@18:       $container->get('entity_type.manager'),
Chris@18:       $container->get('renderer'),
Chris@18:       $container->get('entity.repository')
Chris@18:     );
Chris@18:   }
Chris@18: 
Chris@18:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function view(EntityInterface $node_preview, $view_mode_id = 'full', $langcode = NULL) {
Chris@0:     $node_preview->preview_view_mode = $view_mode_id;
Chris@0:     $build = parent::view($node_preview, $view_mode_id);
Chris@0: 
Chris@0:     $build['#attached']['library'][] = 'node/drupal.node.preview';
Chris@0: 
Chris@0:     // Don't render cache previews.
Chris@0:     unset($build['#cache']);
Chris@0: 
Chris@0:     return $build;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * The _title_callback for the page that renders a single node in preview.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Entity\EntityInterface $node_preview
Chris@0:    *   The current node.
Chris@0:    *
Chris@0:    * @return string
Chris@0:    *   The page title.
Chris@0:    */
Chris@0:   public function title(EntityInterface $node_preview) {
Chris@18:     return $this->entityRepository->getTranslationFromContext($node_preview)->label();
Chris@0:   }
Chris@0: 
Chris@0: }