class PathHasAlias

class PathHasAlias extends RulesConditionBase implements ContainerFactoryPluginInterface {
  
  /**
   * The alias manager service.
   *
   * @var \Drupal\path_alias\AliasManagerInterface
   */
  protected $aliasManager;
  
  /**
   * Constructs a PathHasAlias object.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin ID for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\path_alias\AliasManagerInterface $alias_manager
   *   The alias manager service.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, AliasManagerInterface $alias_manager) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->aliasManager = $alias_manager;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container->get('path_alias.manager'));
  }
  
  /**
   * Check if a URL path has a URL alias.
   *
   * @param string $path
   *   The path to check.
   * @param \Drupal\Core\Language\LanguageInterface|null $language
   *   An optional language to look up the path in.
   *
   * @return bool
   *   TRUE if the path has an alias in the given language.
   */
  protected function doEvaluate($path, LanguageInterface $language = NULL) {
    $langcode = is_null($language) ? NULL : $language->getId();
    $alias = $this->aliasManager
      ->getAliasByPath($path, $langcode);
    // getAliasByPath() returns the path if there is no alias.
    return $alias != $path;
  }

}