EntityPermissionsRouteProvider.php

<?php

namespace Drupal\user\Entity;

use Drupal\Core\Entity\EntityHandlerInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Entity\Routing\EntityRouteProviderInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;

/**
 * Provides routes for the entity permissions form.
 *
 * Use this class or EntityPermissionsRouteProviderWithCheck as a route
 * provider for an entity type such as Vocabulary. Either one will provide
 * routes for the entity permissions form. The
 * EntityPermissionsRouteProviderWithCheck class provides a custom access check:
 * it denies access if there are no entity-specific permissions. If you know
 * that each entity has permissions, or if the check is too expensive, then use
 * this class.
 */
class EntityPermissionsRouteProvider implements EntityRouteProviderInterface, EntityHandlerInterface {

  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;

  /**
   * Constructs a new EntityPermissionsRouteProvider.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   */
  public function __construct(EntityTypeManagerInterface $entity_type_manager) {
    $this->entityTypeManager = $entity_type_manager;
  }

  /**
   * {@inheritdoc}
   */
  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
    return new static($container
      ->get('entity_type.manager'));
  }

  /**
   * {@inheritdoc}
   */
  public function getRoutes(EntityTypeInterface $entity_type) {
    $collection = new RouteCollection();
    $entity_type_id = $entity_type
      ->id();
    if ($entity_permissions_route = $this
      ->getEntityPermissionsRoute($entity_type)) {
      $collection
        ->add("entity.{$entity_type_id}.entity_permissions_form", $entity_permissions_route);
    }
    return $collection;
  }

  /**
   * Gets the entity permissions route.
   *
   * Built only for entity types that are bundles of other entity types and
   * define the 'entity-permissions-form' link template.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type.
   *
   * @return \Symfony\Component\Routing\Route|null
   *   The generated route, if available.
   */
  protected function getEntityPermissionsRoute(EntityTypeInterface $entity_type) : ?Route {
    if (!$entity_type
      ->hasLinkTemplate('entity-permissions-form')) {
      return NULL;
    }
    if (!($bundle_of_id = $entity_type
      ->getBundleOf())) {
      return NULL;
    }
    $entity_type_id = $entity_type
      ->id();
    $route = new Route($entity_type
      ->getLinkTemplate('entity-permissions-form'), [
      '_title' => 'Manage permissions',
      '_form' => 'Drupal\\user\\Form\\EntityPermissionsForm',
      'entity_type_id' => $bundle_of_id,
      'bundle_entity_type' => $entity_type_id,
    ], [
      '_permission' => 'administer permissions',
    ], [
      // Indicate that Drupal\Core\Entity\Enhancer\EntityBundleRouteEnhancer should
      // set the bundle parameter.
      '_field_ui' => TRUE,
      'parameters' => [
        $entity_type_id => [
          'type' => "entity:{$entity_type_id}",
          'with_config_overrides' => TRUE,
        ],
      ],
      '_admin_route' => TRUE,
    ]);
    return $route;
  }

}