MediaRevisionAccessCheck.php

<?php

namespace Drupal\media\Access;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Routing\Access\AccessInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\media\MediaInterface;
use Symfony\Component\Routing\Route;

/**
 * Provides an access checker for media item revisions.
 *
 * @ingroup media_access
 */
class MediaRevisionAccessCheck implements AccessInterface {
    
    /**
     * The media storage.
     *
     * @var \Drupal\Core\Entity\ContentEntityStorageInterface
     */
    protected $mediaStorage;
    
    /**
     * The media access control handler.
     *
     * @var \Drupal\Core\Entity\EntityAccessControlHandlerInterface
     */
    protected $mediaAccess;
    
    /**
     * Constructs a new MediaRevisionAccessCheck.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     */
    public function __construct(EntityTypeManagerInterface $entity_type_manager) {
        @trigger_error('MediaRevisionAccessCheck is deprecated in drupal:9.3.0 and will be removed before drupal:10.0.0. Use "_entity_access" requirement with relevant operation instead. See https://www.drupal.org/node/3161210', E_USER_DEPRECATED);
        $this->mediaStorage = $entity_type_manager->getStorage('media');
        $this->mediaAccess = $entity_type_manager->getAccessControlHandler('media');
    }
    
    /**
     * Checks routing access for the media item revision.
     *
     * @param \Symfony\Component\Routing\Route $route
     *   The route to check against.
     * @param \Drupal\Core\Session\AccountInterface $account
     *   The currently logged in account.
     * @param int $media_revision
     *   (optional) The media item revision ID. If not specified, but $media is,
     *   access is checked for that object's revision.
     * @param \Drupal\media\MediaInterface $media
     *   (optional) A media item. Used for checking access to a media items
     *   default revision when $media_revision is unspecified. Ignored when
     *   $media_revision is specified. If neither $media_revision nor $media are
     *   specified, then access is denied.
     *
     * @return \Drupal\Core\Access\AccessResultInterface
     *   The access result.
     */
    public function access(Route $route, AccountInterface $account, $media_revision = NULL, MediaInterface $media = NULL) {
        if ($media_revision) {
            $media = $this->mediaStorage
                ->loadRevision($media_revision);
        }
        $operation = $route->getRequirement('_access_media_revision');
        return AccessResult::allowedIf($media && $this->checkAccess($media, $account, $operation))
            ->cachePerPermissions()
            ->addCacheableDependency($media);
    }
    
    /**
     * Checks media item revision access.
     *
     * @param \Drupal\media\MediaInterface $media
     *   The media item to check.
     * @param \Drupal\Core\Session\AccountInterface $account
     *   A user object representing the user for whom the operation is to be
     *   performed.
     * @param string $op
     *   (optional) The specific operation being checked. Defaults to 'view'.
     *
     * @return bool
     *   TRUE if the operation may be performed, FALSE otherwise.
     */
    public function checkAccess(MediaInterface $media, AccountInterface $account, $op = 'view') {
        if (!$media || $op !== 'view') {
            // If there was no media to check against, or the $op was not one of the
            // supported ones, we return access denied.
            return FALSE;
        }
        return $this->mediaAccess
            ->access($media, 'view all revisions', $account);
    }

}