PreviewLinkAccessCheck.php in Preview Link 2.x

Namespace

Drupal\preview_link\Access

File

src/Access/PreviewLinkAccessCheck.php

<?php

declare (strict_types=1);
namespace Drupal\preview_link\Access;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Access\AccessResultInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Routing\Access\AccessInterface;
use Drupal\preview_link\PreviewLinkHostInterface;

/**
 * Preview link access check.
 */
class PreviewLinkAccessCheck implements AccessInterface {

  /**
   * Preview link host service.
   *
   * @var \Drupal\preview_link\PreviewLinkHostInterface
   */
  protected $previewLinkHost;

  /**
   * PreviewLinkAccessCheck constructor.
   *
   * @param \Drupal\preview_link\PreviewLinkHostInterface $previewLinkHost
   *   Preview link host service.
   */
  public function __construct(PreviewLinkHostInterface $previewLinkHost) {
    $this->previewLinkHost = $previewLinkHost;
  }

  /**
   * Checks access to the node add page for the node type.
   *
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity.
   * @param string $preview_token
   *   The preview token.
   *
   * @return \Drupal\Core\Access\AccessResult
   *   A \Drupal\Core\Access\AccessInterface value.
   */
  public function access(EntityInterface $entity = NULL, string $preview_token = NULL) : AccessResultInterface {
    $neutral = AccessResult::neutral()
      ->addCacheableDependency($entity)
      ->addCacheContexts([
      'preview_link_route',
    ]);
    if (!$preview_token || !$entity) {
      return $neutral;
    }

    // If we can't find a valid preview link then ignore this.
    if (!$this->previewLinkHost
      ->hasPreviewLinks($entity)) {
      return $neutral
        ->setReason('This entity does not have a preview link.');
    }

    // If an entity has a preview link and it doesnt match up, then explicitly
    // deny access.
    if (!$this->previewLinkHost
      ->isToken($entity, [
      $preview_token,
    ])) {
      return AccessResult::forbidden('Preview token is invalid.')
        ->addCacheableDependency($entity)
        ->addCacheContexts([
        'preview_link_route',
      ]);
    }
    return AccessResult::allowed()
      ->addCacheableDependency($entity)
      ->addCacheContexts([
      'preview_link_route',
    ]);
  }

}

Classes

Name	Description
PreviewLinkAccessCheck	Preview link access check.