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;
    }

}