devel_wizard-2.x-dev/templates/spell/entity_type/content/view_controller.php.twig

{%
  include '@devel_wizard/php/devel_wizard.php.file.header.php.twig'
  with {
    'namespace': content.namespace,
  }
%}

use {{ content.interface_fqn }};
{%-
  include '@devel_wizard/php/devel_wizard.php.file.use_statements.php.twig'
  with {
    'useStatements': {
      'Drupal\\Component\\Utility\\Xss': '',
      'Drupal\\Core\\Entity\\Controller\\EntityViewController': '',
      'Drupal\\Core\\Entity\\EntityHandlerInterface': '',
      'Drupal\\Core\\Entity\\EntityInterface': '',
      'Drupal\\Core\\Entity\\EntityTypeInterface': '',
      'Drupal\\Core\\Entity\\EntityTypeManagerInterface': '',
      'Drupal\\Core\\Render\\RendererInterface': '',
      'Drupal\\Core\\Session\\AccountInterface': '',
      'Symfony\\Component\\DependencyInjection\\ContainerInterface': '',
    },
  }
%}

class ViewController extends EntityViewController implements EntityHandlerInterface {

  protected AccountInterface $currentUser;

  /**
   * {@inheritdoc}
   */
  public static function createInstance(
    ContainerInterface $container,
    EntityTypeInterface $entity_type,
  ) {
    return static::create($container);
  }

  /**
   * {@inheritdoc}
   *
   * @return static
   */
  public static function create(ContainerInterface $container) {
    // @phpstan-ignore-next-lines
    return new static(
      $container->get('entity_type.manager'),
      $container->get('renderer'),
      $container->get('current_user'),
    );
  }

  /**
   * {@inheritdoc}
   */
  public function __construct(
    EntityTypeManagerInterface $entityTypeManager,
    RendererInterface $renderer,
    AccountInterface $currentUser,
  ) {
    $this->currentUser = $currentUser;

    parent::__construct($entityTypeManager, $renderer);
  }

  /**
   * Route title callback.
   *
   * @phpstan-return array<string, mixed>
   */
  public function title({{ content.interface }} ${{ content.id }}): array {
    return [
      '#markup' => ${{ content.id }}->label(),
      '#allowed_tags' => Xss::getHtmlTagList(),
    ];
  }

  /**
   * {@inheritdoc}
   *
   * @param \{{ content.interface_fqn }} $_entity
   * @param string $view_mode
   * @param null|string $langcode
   *
   * @phpstan-return array<string, mixed>
   *
   * @throws \Drupal\Core\Entity\EntityMalformedException
   */
  public function view(EntityInterface $_entity, $view_mode = 'full', $langcode = NULL) {
    $build = parent::view($_entity, $view_mode);

    foreach ($_entity->uriRelationships() as $rel) {
      $url = $_entity->toUrl($rel);

      // Add link relationships if the user is authenticated or if the anonymous
      // user has access. Access checking must be done for anonymous users to
      // avoid traffic to inaccessible pages from web crawlers. For
      // authenticated users, showing the links in HTML head does not impact
      // user experience or security, since the routes are access checked when
      // visited and only visible via view source. This prevents doing
      // potentially expensive and hard to cache access checks on every request.
      // This means that the page will vary by user.permissions. We also rely on
      // the access checking fallback to ensure the correct cacheability
      // metadata if we have to check access.
      if ($this->currentUser->isAuthenticated() || $url->access($this->currentUser)) {
        // Set the path as the canonical URL to prevent duplicate content.
        $build['#attached']['html_head_link'][] = [
          [
            'rel' => $rel,
            'href' => $url->toString(),
          ],
          TRUE,
        ];
      }

      if ($rel === 'canonical') {
        // Set the non-aliased canonical path as a default shortlink.
        $build['#attached']['html_head_link'][] = [
          [
            'rel' => 'shortlink',
            'href' => $url->setOption('alias', TRUE)->toString(),
          ],
          TRUE,
        ];
      }
    }

    // Given this varies by $this->currentUser->isAuthenticated(), add a cache
    // context based on the anonymous role.
    $build['#cache']['contexts'][] = 'user.roles:anonymous';

    return $build;
  }

}