/**
  * Show the form for editing the specified resource.
  *
  * @param  int $id
  *
  * @return Response
  */
 public function edit($id)
 {
     $post = $this->post->find($id);
     $news = null;
     if (request()->has('url')) {
         $news = $this->rss->fetchData(request('url'));
     }
     if (is_null($post)) {
         return redirect()->route('post.index')->with('error', 'Post not found.');
     }
     return view('post.edit', compact('post', 'news'));
 }