public function addUrlsOnPostSerialize(ObjectEvent $event)
    {
        $article = $event->getObject();
        $visitor = $event->getVisitor();
        $context = $event->getContext();
        $request = $this->requestStack->getCurrentRequest();

        if (!$article instanceof ArticleDocument || !$context->attributes->containsKey('website') || !$request) {
            return;
        }

        /** @var RequestAttributes $attributes */
        $attributes = $request->get('_sulu');
        if (!$attributes) {
            return;
        }

        /** @var Webspace $webspace */
        $webspace = $attributes->getAttribute('webspace');
        if (!$webspace) {
            return;
        }

        $urls = [];
        foreach ($webspace->getAllLocalizations() as $localization) {
            $locale = $localization->getLocale();
            $route = $this->routeRepository->findByEntity(get_class($article), $article->getUuid(), $locale);

            $urls[$locale] = '/';
            if ($route) {
                $urls[$locale] = $route->getPath();
            }
        }

        $visitor->addData('urls', $context->accept($urls));
    }