/**
  * Update the specified article in storage.
  *
  * @param $id
  * @return \Illuminate\Http\Response
  */
 public function draft($id)
 {
     $article = Article::whereId($id)->firstOrFail();
     $article->status = 'draft';
     if ($article->save()) {
         return redirect(route('account.article.index'))->with(['status' => 'warning', 'message' => Lang::get('alert.article.mark', ['title' => $article->title, 'type' => 'status', 'label' => 'draft'])]);
     }
     return redirect()->back()->withErrors(['error' => Lang::get('alert.error.database')]);
 }