class TitleResolver

class TitleResolver extends ControllerTitleResolver {
    
    /**
     * The field storage config storage.
     *
     * @var \Drupal\Core\Entity\EntityTypeManager
     */
    protected $entityTypeManager;
    
    /**
     * Breadcrumb config object.
     *
     * @var \Drupal\Core\Config\Config
     */
    protected $config;
    
    /**
     * The language manager.
     *
     * @var \Drupal\Core\Language\LanguageManagerInterface
     */
    protected $languageManager;
    
    /**
     * Constructs a new EntityDisplayRebuilder.
     *
     * @param \Drupal\Core\Controller\ControllerResolverInterface $controller_resolver
     *   The controller resolver.
     * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
     *   The translation manager.
     * @param \Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface $argument_resolver
     *   The argument resolver.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity manager.
     * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
     *   The config factory service.
     * @param \Drupal\Core\Language\LanguageManagerInterface $languageManager
     *   The language manager.
     */
    public function __construct(ControllerResolverInterface $controller_resolver, TranslationInterface $string_translation, ArgumentResolverInterface $argument_resolver, EntityTypeManagerInterface $entity_type_manager, ConfigFactoryInterface $config_factory, LanguageManagerInterface $languageManager) {
        parent::__construct($controller_resolver, $string_translation, $argument_resolver);
        $this->entityTypeManager = $entity_type_manager;
        $this->config = $config_factory->get(EasyBreadcrumbConstants::MODULE_SETTINGS);
        $this->languageManager = $languageManager;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getTitle(Request $request, Route $route) {
        $url = Url::fromUri("internal:" . $request->getRequestUri());
        $route_parts = explode(".", $url->getRouteName());
        $entity = NULL;
        $params = $url->getRouteParameters();
        if ($route_parts[0] === 'entity' && $route_parts[2] === 'canonical') {
            $entity_type = $route_parts[1];
            $entity = $this->entityTypeManager
                ->getStorage($entity_type)
                ->load($params[$entity_type]);
        }
        if ($entity !== NULL) {
            $current_langcode = $this->languageManager
                ->getCurrentLanguage()
                ->getId();
            if ($entity instanceof TranslatableInterface && $entity->hasTranslation($current_langcode)) {
                $entity = $entity->getTranslation($current_langcode);
            }
            $alternative_title_field = $this->config
                ->get(EasyBreadcrumbConstants::ALTERNATIVE_TITLE_FIELD);
            if ($entity instanceof FieldableEntityInterface && $entity->hasField($alternative_title_field) && !$entity->get($alternative_title_field)
                ->isEmpty()) {
                return Xss::filter($entity->get($alternative_title_field)->value);
            }
        }
        return parent::getTitle($request, $route);
    }

}