Sort menu Items - Drupal 8

Sort Menu Items - Drupal 8

<?php

namespace Drupal\wb_theme\Plugin\Preprocess;

use Drupal\Core\Menu\MenuLinkTreeInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 *
 */
class Menu implements ContainerFactoryPluginInterface  {

  /**
   * Menu Link Tree Interface.
   *
   * @var \Drupal\Core\Menu\MenuLinkTreeInterface
   *   Menu tree service.
   */
  protected $menuTree;

  /**
   * {@inheritdoc}
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, MenuLinkTreeInterface $menu_link_tree) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->menuTree = $menu_link_tree;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('menu.link_tree')
    );
  }

  /**
   * Get a menu tree.
   *
   * @param string $name
   *   Menu name.
   *
   * @return array
   *   Menu tree.
   */
  public function getMenuTree($name) {
    // @see https://www.drupal.org/project/drupal/issues/3019572#comment-13131191.
    $parameters = $this->menuTree->getCurrentRouteMenuTreeParameters($name);
    $tree = $this->menuTree->load($name, $parameters);
    // Sort menu items.
    // @see: https://www.drupal.org/project/drupal/issues/3015631#comment-13155444.
    $manipulators = [
      ['callable' => 'menu.default_tree_manipulators:checkAccess'],
      ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
    ];
    $tree = $this->menuTree->transform($tree, $manipulators);
    return $tree;
  }

}