/**
* Respond single Article item in JSON.
*
* @param \App\Article $article
* @param \Illuminate\Database\Eloquent\Collection|null $commentsCollection
* @param string|null $cacheKey
* @return \Illuminate\Http\JsonResponse
*/
protected function respondItem(Article $article, Collection $commentsCollection = null, $cacheKey = null)
{
$reqEtag = request()->getETags();
$genEtag = $article->etag($cacheKey);
if (config('project.cache') === true and isset($reqEtag[0]) and $reqEtag[0] === $genEtag) {
return $this->respondNotModified();
}
return json()->setHeaders(['Etag' => $genEtag])->withItem($article, new ArticleTransformer());
}
