arch-8.x-1.x-dev/modules/order/src/Controller/OrderViewController.php

<?php

namespace Drupal\arch_order\Controller;

use Drupal\Core\Entity\Controller\EntityViewController;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityRepositoryInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Render\RendererInterface;
use Drupal\Core\Session\AccountInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Defines a controller to render a single order.
 */
class OrderViewController extends EntityViewController {

  /**
   * Entity repository.
   *
   * @var \Drupal\Core\Entity\EntityRepositoryInterface
   */
  protected $entityRepository;

  /**
   * The current user.
   *
   * @var \Drupal\Core\Session\AccountInterface
   */
  protected $currentUser;

  /**
   * Creates an OrderViewController object.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
   *   The entity repository.
   * @param \Drupal\Core\Render\RendererInterface $renderer
   *   The renderer service.
   * @param \Drupal\Core\Session\AccountInterface $current_user
   *   The current user. For backwards compatibility this is optional, however
   *   this will be removed before Drupal 9.0.0.
   */
  public function __construct(
    EntityTypeManagerInterface $entity_type_manager,
    EntityRepositoryInterface $entity_repository,
    RendererInterface $renderer,
    AccountInterface $current_user = NULL,
  ) {
    parent::__construct($entity_type_manager, $renderer);
    $this->entityRepository = $entity_repository;
    $this->currentUser = $current_user ?: \Drupal::currentUser();
  }

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

  /**
   * {@inheritdoc}
   */
  public function view(EntityInterface $order, $view_mode = 'full', $langcode = NULL) {
    /** @var \Drupal\arch_order\Entity\OrderInterface $order */
    $build = $this->entityTypeManager
      ->getViewBuilder($order->getEntityTypeId())
      ->view($order, $view_mode);

    $build['#pre_render'][] = [$this, 'buildTitle'];
    $build['#entity_type'] = $order->getEntityTypeId();
    $build['#' . $build['#entity_type']] = $order;

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

  /**
   * The _title_callback for the page that renders a single order.
   *
   * @param \Drupal\Core\Entity\EntityInterface $order
   *   The current order.
   *
   * @return string
   *   The page title.
   */
  public function title(EntityInterface $order) {
    return $this->entityRepository->getTranslationFromContext($order)->label();
  }

}