class AdminController

class AdminController extends ControllerBase {
  
  /**
   * The module extension list.
   *
   * @var \Drupal\Core\Extension\ModuleExtensionList
   */
  protected $moduleExtensionList;
  
  /**
   * AdminController constructor.
   *
   * @param \Drupal\Core\Extension\ModuleExtensionList $extension_list_module
   *   The module extension list.
   */
  public function __construct(ModuleExtensionList $extension_list_module) {
    $this->moduleExtensionList = $extension_list_module;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container->get('extension.list.module'));
  }
  
  /**
   * Prints a listing of admin tasks, organized by module.
   *
   * @return array
   *   A render array containing the listing.
   */
  public function index() {
    $extensions = array_intersect_key($this->moduleExtensionList
      ->getList(), $this->moduleHandler()
      ->getModuleList());
    uasort($extensions, [
      ModuleExtensionList::class,
      'sortByName',
    ]);
    $menu_items = [];
    foreach ($extensions as $module => $extension) {
      // Only display a section if there are any available tasks.
      if ($admin_tasks = system_get_module_admin_tasks($module, $extension->info)) {
        // Sort links by title.
        uasort($admin_tasks, [
          '\\Drupal\\Component\\Utility\\SortArray',
          'sortByTitleElement',
        ]);
        // Move 'Configure permissions' links to the bottom of each section.
        $permission_key = "user.admin_permissions.{$module}";
        if (isset($admin_tasks[$permission_key])) {
          $permission_task = $admin_tasks[$permission_key];
          unset($admin_tasks[$permission_key]);
          $admin_tasks[$permission_key] = $permission_task;
        }
        $menu_items[$extension->info['name']] = [
          $extension->info['description'],
          $admin_tasks,
        ];
      }
    }
    $output = [
      '#theme' => 'system_admin_index',
      '#menu_items' => $menu_items,
    ];
    return $output;
  }

}