Allow view access to MediaType entity for anonymous users

Example usecase: As an anonymous user, I want to retrieve a media entity from Drupal and include bundle id.

Using the jsonapi module, I find that only the entity label is returned. What gives?

The media module only allows access to the media_type label, unless the user role has the 'Administer media types' permission.

We don't want to give anonymous users the 'Administer media types' permission.

Solution:

Override the access control handler for the media_type entity. Give permission to view media_type entities if the user has permission to view media entities.

Implement hook_entity_type_alter() and add the class below in your module.

Now the full media_type entity is returned, including drupal_internal__id.

namespace Drupal\my_module\AccessControlHandler;

use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\Access\AccessResult;
use Drupal\media\MediaTypeAccessControlHandler;

/**
 * Access controller for the MediaType entity.
 *
 * @see \Drupal\media\Entity\MediaType.
 */
class OverrideMediaTypeAccessControlHandler extends MediaTypeAccessControlHandler {

  /**
   * {@inheritdoc}
   */
  protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
    /** @var \Drupal\media\Entity\MediaType. $entity */
    if ($operation === 'view') {
      return AccessResult::allowedIfHasPermission($account, 'view media');
    }
    return parent::checkAccess($entity, $operation, $account);
  }
}