function MenuLinkParent::transform

Find the parent link GUID.

Overrides ProcessPluginBase::transform

File

core/modules/migrate/src/Plugin/migrate/process/MenuLinkParent.php, line 136

Class

MenuLinkParent

Determines the parent of a menu link.

Namespace

Code

public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
  $parent_id = array_shift($value);
  // Handle root elements of a menu.
  if (!$parent_id) {
    return '';
  }
  $lookup_result = $this->migrateLookup
    ->lookup($this->migration
    ->id(), [
    $parent_id,
  ]);
  if ($lookup_result) {
    $already_migrated_id = $lookup_result[0]['id'];
  }
  if (!empty($already_migrated_id) && ($link = $this->menuLinkStorage
    ->load($already_migrated_id))) {
    return $link->getPluginId();
  }
  // Parent could not be determined by ID, so we try to determine by the
  // combination of the menu name and parent link path.
  if (isset($value[1])) {
    [
      $menu_name,
      $parent_link_path,
    ] = $value;
    // If the parent link path is external, URL will be useless because the
    // link will definitely not correspond to a Drupal route.
    if (UrlHelper::isExternal($parent_link_path)) {
      $links = $this->menuLinkStorage
        ->loadByProperties([
        'menu_name' => $menu_name,
        'link.uri' => $parent_link_path,
      ]);
    }
    else {
      $url = Url::fromUserInput('/' . ltrim($parent_link_path, '/'));
      if ($url->isRouted()) {
        $links = $this->menuLinkManager
          ->loadLinksByRoute($url->getRouteName(), $url->getRouteParameters(), $menu_name);
      }
    }
    if (!empty($links)) {
      return reset($links)->getPluginId();
    }
  }
  // Parent could not be determined.
  throw new MigrateSkipRowException(sprintf("No parent link found for plid '%d' in menu '%s'.", $parent_id, $value[0]));
}