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path: root/src/JsonapiResourceConfigHtmlRouteProvider.php
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<?php

namespace Drupal\jsonapi_extras;

use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Entity\Routing\AdminHtmlRouteProvider;
use Symfony\Component\Routing\Route;

/**
 * Provides routes for JSON API Resource Config entities.
 *
 * @see \Drupal\Core\Entity\Routing\AdminHtmlRouteProvider
 * @see \Drupal\Core\Entity\Routing\DefaultHtmlRouteProvider
 */
class JsonapiResourceConfigHtmlRouteProvider extends AdminHtmlRouteProvider {

  /**
   * {@inheritdoc}
   */
  public function getRoutes(EntityTypeInterface $entity_type) {
    $collection = parent::getRoutes($entity_type);

    $entity_type_id = $entity_type->id();

    if ($collection_route = $this->getCollectionRoute($entity_type)) {
      $collection->add("entity.{$entity_type_id}.collection", $collection_route);
    }

    if ($add_form_route = $this->getAddFormRoute($entity_type)) {
      $collection->add("entity.{$entity_type_id}.add_form", $add_form_route);
    }

    return $collection;
  }

  /**
   * Gets the collection route.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type.
   *
   * @return \Symfony\Component\Routing\Route|null
   *   The generated route, if available.
   */
  protected function getCollectionRoute(EntityTypeInterface $entity_type) {
    if ($entity_type->hasLinkTemplate('collection') && $entity_type->hasListBuilderClass()) {
      $entity_type_id = $entity_type->id();
      $route = new Route($entity_type->getLinkTemplate('collection'));
      $route
        ->setDefaults([
          '_entity_list' => $entity_type_id,
          // Make sure this is not a TranslatableMarkup object as the
          // TitleResolver translates this string again.
          '_title' => (string) $entity_type->getLabel(),
        ])
        ->setRequirement('_permission', $entity_type->getAdminPermission())
        ->setOption('_admin_route', TRUE);

      return $route;
    }
  }

  /**
   * Gets the add-form route.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type.
   *
   * @return \Symfony\Component\Routing\Route|null
   *   The generated route, if available.
   */
  protected function getAddFormRoute(EntityTypeInterface $entity_type) {
    if ($entity_type->hasLinkTemplate('add-form')) {
      $entity_type_id = $entity_type->id();
      $route = new Route($entity_type->getLinkTemplate('add-form'));
      // Use the add form handler, if available, otherwise default.
      $operation = 'default';
      if ($entity_type->getFormClass('add')) {
        $operation = 'add';
      }
      $route
        ->setDefaults([
          '_entity_form' => "{$entity_type_id}.{$operation}",
          '_title' => "Add {$entity_type->getLabel()}",
        ])
        ->setRequirement('_entity_create_access', $entity_type_id)
        ->setOption('parameters', [
          $entity_type_id => ['type' => 'entity:' . $entity_type_id],
        ])
        ->setOption('_admin_route', TRUE);

      return $route;
    }
  }

}