Issue #3325129: Merge reference.

group_relationship.group_media_relate_page:

  route_name: 'entity.group_relationship.group_media_relate_page'

  route_name: 'entity.group_relationship.group_media_add_page'

  title: 'Relate media'

  appears_on:

    - 'view.group_media.page_1'

group_relationship.group_media_add_page:

  route_name: 'entity.group_relationship.group_media_add_page'

  route_name: 'entity.group_relationship.group_media_create_page'

  title: 'Create media'

  appears_on:

    - 'view.group_media.page_1'

    _form: 'Drupal\groupmedia\Form\GroupMediaSettingsForm'

  requirements:

    _permission: 'administer groupmedia'

route_callbacks:

  - '\Drupal\groupmedia\Routing\GroupMediaRouteProvider::getRoutes'

services:

  groupmedia.route_subscriber:

    class: 'Drupal\groupmedia\Routing\RouteSubscriber'

    tags:

      - { name: 'event_subscriber' }

  plugin.manager.groupmedia.finder:

    class: Drupal\groupmedia\MediaFinderManager

<?php

namespace Drupal\groupmedia\Controller;

use Drupal\group\Entity\Controller\GroupRelationshipController;

use Drupal\group\Entity\GroupInterface;

use Symfony\Component\DependencyInjection\ContainerInterface;

/**

 * Returns responses for 'group_media' GroupRelationship routes.

 */

class GroupMediaController extends GroupRelationshipController {

  /**

   * The group relationship type plugin manager.

   *

   * @var \Drupal\group\Plugin\Group\Relation\GroupRelationTypeManagerInterface

   */

  protected $pluginManager;

  /**

   * {@inheritdoc}

   */

  public static function create(ContainerInterface $container) {

    $instance = parent::create($container);

    $instance->pluginManager = $container->get('group_relation_type.manager');

    return $instance;

  }

  /**

   * {@inheritdoc}

   */

  public function addPage(GroupInterface $group, $create_mode = FALSE, $base_plugin_id = NULL) {

    $build = parent::addPage($group, $create_mode);

    // Do not interfere with redirects.

    if (!is_array($build)) {

      return $build;

    }

    // Overwrite the label and description for all displayed bundles.

    $media_type_storage = $this->entityTypeManager->getStorage('media_type');

    $group_type = $group->getGroupType();

    foreach ($this->addPageBundles($group, $create_mode, $base_plugin_id) as $bundle_id => $bundle) {

      if (!empty($build['#bundles'][$bundle_id])) {

        $plugin = $group_type->getPlugin($bundle->getPluginId());

        $media_type = $plugin->getRelationType()->getEntityBundle();

        $media_type_label = $media_type_storage->load($media_type)->label();

        $t_args = ['%media_type' => $media_type_label];

        $description = $create_mode

          ? $this->t('Create a media of type %media_type in the group.', $t_args)

          : $this->t('Add an existing media of type %media_type to the group.', $t_args);

        $build['#bundles'][$bundle_id]['label'] = $media_type_label;

        $build['#bundles'][$bundle_id]['description'] = $description;

      }

    }

    // Display the bundles in alpha order by label.

    if (is_array($build['#bundles'])) {

      uasort($build['#bundles'], function ($a, $b) {

        return strnatcmp($a['label'], $b['label']);

      });

    }

    return $build;

  }

  /**

   * {@inheritdoc}

   */

  protected function addPageBundles(GroupInterface $group, $create_mode, $base_plugin_id) {

    // Retrieve all group_media plugins for the group's type.

    $plugin_ids = $this->pluginManager->getInstalledIds($group->getGroupType());

    foreach ($plugin_ids as $key => $plugin_id) {

      if (strpos($plugin_id, 'group_media:') !== 0) {

        unset($plugin_ids[$key]);

      }

    }

    // Retrieve all responsible group content types, keyed by plugin ID.

    $storage = $this->entityTypeManager->getStorage('group_relationship_type');

    $properties = [

      'group_type' => $group->bundle(),

      'content_plugin' => $plugin_ids,

    ];

    return $storage->loadByProperties($properties);

  }

}

<?php

namespace Drupal\groupmedia\Routing;

use Drupal\media\Entity\MediaType;

use Symfony\Component\Routing\Route;

/**

 * Provides routes for group_media group content.

 */

class GroupMediaRouteProvider {

  /**

   * Provides the shared collection route for group media plugins.

   */

  public function getRoutes() {

    $routes = $plugin_ids = $permissions_add = $permissions_create = [];

    foreach (MediaType::loadMultiple() as $name => $media_bundle) {

      $plugin_id = "group_media:$name";

      $plugin_ids[] = $plugin_id;

      $permissions_add[] = "create $plugin_id content";

      $permissions_create[] = "create $plugin_id entity";

    }

    // If there are no media types yet, we cannot have any plugin IDs and should

    // therefore exit early because we cannot have any routes for them either.

    if (empty($plugin_ids)) {

      return $routes;

    }

    $routes['entity.group_relationship.group_media_relate_page'] = new Route('group/{group}/media/add');

    $routes['entity.group_relationship.group_media_relate_page']

      ->setDefaults([

        '_title' => 'Relate media',

        '_controller' => '\Drupal\groupmedia\Controller\GroupMediaController::addPage',

      ])

      ->setRequirement('_group_permission', implode('+', $permissions_add))

      ->setRequirement('_group_installed_content', implode('+', $plugin_ids))

      ->setOption('_group_operation_route', TRUE);

    $routes['entity.group_relationship.group_media_add_page'] = new Route('group/{group}/media/create');

    $routes['entity.group_relationship.group_media_add_page']

      ->setDefaults([

        '_title' => 'Create media',

        '_controller' => '\Drupal\groupmedia\Controller\GroupMediaController::addPage',

        'create_mode' => TRUE,

      ])

      ->setRequirement('_group_permission', implode('+', $permissions_create))

      ->setRequirement('_group_installed_content', implode('+', $plugin_ids))

      ->setOption('_group_operation_route', TRUE);

    return $routes;

  }

}