Issue #3268167 by jonathan1055: Avoid potential duplicate local tasks

    $migrations[$plugin_id]['process']['third_party_settings/scheduler'] = 'scheduler_third_party_settings';

  }

}

/**

 * Implements hook_local_tasks_alter().

 */

function scheduler_local_tasks_alter(&$local_tasks) {

  // If the default local tasks for the overviews are also provided by another

  // module or by Core, then remove the ones added by Scheduler in

  // src/Plugin/Derivative/DynamicLocalTasks. This is to avoid duplicate links

  // if this core issue gets committed at some time.

  // @see https://www.drupal.org/project/drupal/issues/3199682

  // Get the list of routes to check.

  $routes_to_check = \Drupal::service('scheduler.manager')->getCollectionRoutes();

  // Find all the local tasks with the routes we are searching for and that have

  // a parent_id. These will be the links that are potential duplicates.

  $found = [];

  foreach ($local_tasks as $key => $value) {

    foreach ($routes_to_check as $route) {

      if ($value['route_name'] == $route && !empty($value['parent_id'])) {

        // Save the key of the $local_tasks array in a two level array, keyed on

        // the route and the module that provided it.

        $found[$route][$value['provider']] = $key;

      }

    }

  }

  // If there is more than one for any of the routes being checked then remove

  // the route added by Scheduler.

  foreach ($found as $route => $data) {

    if (count($data) > 1) {

      unset($local_tasks[$data['scheduler']]);

      unset($data['scheduler']);

    }

    // We assume that the duplicates are only caused by Scheduler. Other modules

    // could be causing more so log this and solve it later if it ever happens.

    if (count($data) > 1) {

      \Drupal::logger('scheduler')->warning('Local task route %route contains duplicates in addition to Scheduler. %data', [

        '%route' => $route,

        '%data' => print_r($data, TRUE),

      ]);

    }

  }

}

   */

  public $develGenerateForm = '';

  /**

   * The route of the collection overview page.

   *

   * The default is entity.{$entityType}.collection so this property only needs

   * to be specified if that route is not the correct one.

   *

   * @var string

   */

  public $collectionRoute;

  /**

   * The route of the scheduled view on the user profile page (optional).

   *

      // is required when adding additional local tasks. If that module is not

      // installed then define the tab here. This can be removed if

      // https://www.drupal.org/project/drupal/issues/3199682 gets committed.

      if (!\Drupal::moduleHandler()->moduleExists('content_moderation')) {

      // See also scheduler_local_tasks_alter().

      $this->derivatives['scheduler.content_overview'] = [

        'title' => $this->t('Overview'),

        'route_name' => 'system.admin_content',

        'parent_id' => 'system.admin_content',

      ] + $base_plugin_definition;

    }

    }

    $view = View::load('scheduler_scheduled_media');

    if ($view && $view->status() && $view->getDisplay('overview')) {

 *  typeFieldName = "type",

 *  dependency = "node",

 *  develGenerateForm = "devel_generate_form_content",

 *  collectionRoute = "system.admin_content",

 *  userViewRoute = "view.scheduler_scheduled_content.user_page",

 * )

 */

 *  typeFieldName = "vid",

 *  dependency = "taxonomy",

 *  develGenerateForm = "devel_generate_form_term",

 *  collectionRoute = "entity.taxonomy_vocabulary.collection",

 *  schedulerEventClass = "\Drupal\scheduler\Event\SchedulerTaxonomyTermEvents",

 * )

 */