public function preview()
{
$forum = Forum::findOrFail(Request::input('forum_id'));
priv_check('ForumTopicStore', $forum)->ensureCan();
$post = new Post(['post_text' => Request::input('body'), 'user' => Auth::user(), 'post_time' => Carbon::now()]);
$options = ['overlay' => true, 'signature' => $forum->enable_sigs];
return view('forum.topics._post', compact('post', 'options'));
}