public function comment(string $slug, PostRepository $repository, CommentRequest $request)
{
    $this->authorize('create', Comment::class);

    Comment::create([
        'post_id' => $repository->getPostBySlug($slug)->id,
        'author' => Auth::user()->name,
        'text' => $request->input('text'),
    ]);

    return Response::json(['success' => 'Комментарий успешно добавлен']);
}