public function PreviewLinkCanonicalRerouteAccessCheck::access in Preview Link 2.x

Same name and namespace in other branches

1. 2.0.x src/Access/PreviewLinkCanonicalRerouteAccessCheck.php \Drupal\preview_link\Access\PreviewLinkCanonicalRerouteAccessCheck::access()

Checks if an activated preview link token is associated with this entity.

Parameters

\Symfony\Component\HttpFoundation\Request|null $request: The request.

Return value

\Drupal\Core\Access\AccessResult A \Drupal\Core\Access\AccessInterface value.

Throws

\Drupal\preview_link\Exception\PreviewLinkRerouteException When a claimed token grants access to entity for this route match.

File

src/Access/PreviewLinkCanonicalRerouteAccessCheck.php, line 75

Class

PreviewLinkCanonicalRerouteAccessCheck

Reroutes users from a canonical route to preview link route.

Namespace

Drupal\preview_link\Access

Code

public function access(Request $request = NULL) : AccessResultInterface {
  $cacheability = (new CacheableMetadata())
    ->addCacheContexts([
    'session',
    'route',
  ]);

  // Dont use argument resolved route match or route, get the real route match
  // from the master request.
  $routeMatch = $this->routeMatch
    ->getMasterRouteMatch();
  $route = $routeMatch
    ->getRouteObject();
  $entityParameterName = $route ? $route
    ->getRequirement('_access_preview_link_canonical_rerouter') : NULL;
  if (!isset($entityParameterName)) {

    // If the requirement doesnt exist then the master request isn't the
    // canonical route, its probably simulated from something like menu or
    // breadcrumb.
    return AccessResult::allowed()
      ->addCacheableDependency($cacheability);
  }
  $cacheability = (new CacheableMetadata())
    ->addCacheContexts([
    'session',
    'route',
  ]);
  if (!$request) {
    return AccessResult::allowed()
      ->addCacheableDependency($cacheability);
  }
  $entity = $routeMatch
    ->getParameter($entityParameterName);
  if (!$entity instanceof EntityInterface) {

    // Entity was not upcast for preview link reroute access check.
    return AccessResult::allowed()
      ->addCacheableDependency($cacheability);
  }
  $collection = $this->privateTempStoreFactory
    ->get('preview_link');
  $claimedTokens = $collection
    ->get('keys') ?? [];
  if (!$claimedTokens) {

    // Session has no claimed tokens.
    return AccessResult::allowed()
      ->addCacheableDependency($cacheability);
  }
  if (!$this->previewLinkHost
    ->isToken($entity, $claimedTokens)) {

    // This session doesnt have an activated preview link tokens matching this
    // entity.
    return AccessResult::allowed()
      ->addCacheableDependency($cacheability);
  }

  // Check if any keys in this session unlock this entity.
  $previewLinks = $this->previewLinkHost
    ->getPreviewLinks($entity);

  // Get the first token that matches this entity.
  foreach ($previewLinks as $previewLink) {
    if (in_array($previewLink
      ->getToken(), $claimedTokens, TRUE)) {
      throw new PreviewLinkRerouteException('', 0, NULL, $entity, $previewLink);
    }
  }
  throw new \LogicException('Shouldnt get here unless there are implementation differences between isToken and getPreviewLinks.');
}