/**
  * Update the counselor associated with the attendee.
  *
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function updateCounselor($id)
 {
     $attendee = Attendee::find($id);
     if (!$attendee) {
         return $this->respondNotFound('Attendee does not exist.');
     }
     $counselorId = Input::get('counselor_id');
     if (!$counselorId) {
         return $this->respondUnprocessableEntity('Parameters failed validation for an attendee.');
     }
     try {
         $newCounselor = Counselor::findOrFail($counselorId);
     } catch (ModelNotFoundException $e) {
         return $this->respondUnprocessableEntity('Counselor provided does not exist');
     }
     //We pass validation. Now softDelete the existing counselor and replace it.
     $currentCounselor = $attendee->counselor;
     if ($currentCounselor->id != $newCounselor->id) {
         $attendee->reassignCounselor($newCounselor->id);
         return $this->respond(['message' => "The attendee/counselor assignment has been updated."]);
     }
     return $this->respond(['message' => "The attendee/counselor assignment remains unchanged."]);
 }