+ // If no original post could be found, it could possibly be a forum post, there we remove the "origin" field.
+ // @TODO: Replace with parameter from router
+ $item = Item::selectFirst(['id', 'author-link'], ['guid' => $a->argv[1], 'private' => false]);
+ if (!DBA::isResult($item) || !strstr($item['author-link'], System::baseUrl())) {
+ throw new \Friendica\Network\HTTPException\NotFoundException();
+ }