public function showCategory($category, $page = 1)
{
$articles = $this->service->getByCategory($category, $page, self::ARTICLE_LIMIT);
$max_pages = ceil($articles->count() / self::ARTICLE_LIMIT);
return view('article.index', ['articles' => $articles, 'max_pages' => $max_pages, 'current_page' => $page]);
}
