protected function saveCover(ArticleRequest $request, $article)
{
if (!$request->hasfile('cover')) {
return $article->cover;
}
$file = $request->file('cover');
if (!$file->isValid()) {
throw new Exception(trans('strings.image_not_invalid'));
}
$filename = $article->slug . '.' . $file->getClientOriginalExtension();
$file->move(public_path('images/covers'), $filename);
return url('images/covers/' . $filename);
}