/**
* Reply to private message
*
* @param Request $request
* @param integer $caseId
*
* @return \Illuminate\View\View
*/
public function replyPrivate(Request $request, $caseId)
{
$this->validate($request, ['answer' => 'required']);
$case = $this->case->find($caseId);
$this->updateLatestHelper($case);
$conversation = $case->messages->sortByDesc('id')->first();
$answer = $request->input('answer');
$reply = $this->facebookContent->answerPrivate($conversation, $answer);
$this->insertAnswer(self::TYPE_FACEBOOK_PRIVATE, $request, $case, $conversation, $reply, null);
return back();
}