/**
  * Update the specified resource in storage.
  *
  * @param  int  $id
  * @return Response
  */
 public function update($id)
 {
     $input = Request::all();
     $validation = Course::validateUpdate($input, $id);
     if ($validation->fails()) {
         $message = $validation->messages()->first();
         return Response()->json(ResponseManager::getError('', 10, $message));
     }
     $course = Course::where('id', $id)->update($input);
     if ($course) {
         $message = 'Update Successfully.';
         return Response()->json(ResponseManager::getResult($input, 10, $message));
     } else {
         $message = 'Something went wrong. Please try again.';
         return Response()->json(ResponseManager::getError('', 10, $message));
     }
 }