Mercurial > hg > isophonics-drupal-site
view core/modules/node/src/Controller/NodeViewController.php @ 17:129ea1e6d783
Update, including to Drupal core 8.6.10
author | Chris Cannam |
---|---|
date | Thu, 28 Feb 2019 13:21:36 +0000 |
parents | 4c8ae668cc8c |
children | af1871eacc83 |
line wrap: on
line source
<?php namespace Drupal\node\Controller; use Drupal\Core\Entity\EntityInterface; use Drupal\Core\Entity\Controller\EntityViewController; use Drupal\Core\Entity\EntityManagerInterface; use Drupal\Core\Render\RendererInterface; use Drupal\Core\Session\AccountInterface; use Symfony\Component\DependencyInjection\ContainerInterface; /** * Defines a controller to render a single node. */ class NodeViewController extends EntityViewController { /** * The current user. * * @var \Drupal\Core\Session\AccountInterface */ protected $currentUser; /** * Creates an NodeViewController object. * * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager * The entity manager. * @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(EntityManagerInterface $entity_manager, RendererInterface $renderer, AccountInterface $current_user = NULL) { parent::__construct($entity_manager, $renderer); $this->currentUser = $current_user ?: \Drupal::currentUser(); } /** * {@inheritdoc} */ public static function create(ContainerInterface $container) { return new static( $container->get('entity.manager'), $container->get('renderer'), $container->get('current_user') ); } /** * {@inheritdoc} */ public function view(EntityInterface $node, $view_mode = 'full', $langcode = NULL) { $build = parent::view($node, $view_mode, $langcode); foreach ($node->uriRelationships() as $rel) { $url = $node->toUrl($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 node 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 node. * * @param \Drupal\Core\Entity\EntityInterface $node * The current node. * * @return string * The page title. */ public function title(EntityInterface $node) { return $this->entityManager->getTranslationFromContext($node)->label(); } }