public static function ToolbarController::preRenderGetRenderedSubtrees in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/toolbar/src/Controller/ToolbarController.php \Drupal\toolbar\Controller\ToolbarController::preRenderGetRenderedSubtrees()

#pre_render callback for toolbar_get_rendered_subtrees().

@internal

File

core/modules/toolbar/src/Controller/ToolbarController.php, line 92

Class

ToolbarController

Defines a controller for the toolbar module.

Namespace

Drupal\toolbar\Controller

Code

public static function preRenderGetRenderedSubtrees(array $data) {
  $menu_tree = \Drupal::service('toolbar.menu_tree');

  // Load the administration menu. The first level is the "Administration"
  // link. In order to load the children of that link and the subsequent two
  // levels, start at the second level and end at the fourth.
  $parameters = new MenuTreeParameters();
  $parameters
    ->setMinDepth(2)
    ->setMaxDepth(4)
    ->onlyEnabledLinks();

  // @todo Make the menu configurable in https://www.drupal.org/node/1869638.
  $tree = $menu_tree
    ->load('admin', $parameters);
  $manipulators = [
    [
      'callable' => 'menu.default_tree_manipulators:checkAccess',
    ],
    [
      'callable' => 'menu.default_tree_manipulators:generateIndexAndSort',
    ],
    [
      'callable' => 'toolbar_menu_navigation_links',
    ],
  ];
  $tree = $menu_tree
    ->transform($tree, $manipulators);
  $subtrees = [];

  // Calculated the combined cacheability of all subtrees.
  $cacheability = new CacheableMetadata();
  foreach ($tree as $element) {

    /** @var \Drupal\Core\Menu\MenuLinkInterface $link */
    $link = $element->link;
    if ($element->subtree) {
      $subtree = $menu_tree
        ->build($element->subtree);
      $output = \Drupal::service('renderer')
        ->renderPlain($subtree);
      $cacheability = $cacheability
        ->merge(CacheableMetadata::createFromRenderArray($subtree));
    }
    else {
      $output = '';
    }

    // Many routes have dots as route name, while some special ones like
    // <front> have <> characters in them.
    $url = $link
      ->getUrlObject();
    $id = str_replace([
      '.',
      '<',
      '>',
    ], [
      '-',
      '',
      '',
    ], $url
      ->isRouted() ? $url
      ->getRouteName() : $url
      ->getUri());
    $subtrees[$id] = $output;
  }

  // Store the subtrees, along with the cacheability metadata.
  $cacheability
    ->applyTo($data);
  $data['#subtrees'] = $subtrees;
  return $data;
}