public function success(Request $request, Reservation $reservation)
 {
     //change reservation status to complete
     $payment_id = Session::get('paypal_payment_id');
     $reservation->status = 1;
     $reservation->payment_id = $payment_id;
     $cruise = Cruise::find($reservation->cruise_id);
     $cabin = Cabin::find($reservation->cabin_id);
     //deduct cabin number in the cruise
     DB::table('cruises_cabins')->where('cruise_id', $reservation->cruise_id)->where('cabin_id', $reservation->cabin_id)->increment('cabin_booked');
     $reservation->save();
     Session::forget('paypal_payment_id');
     $full = 0;
     foreach ($cruise->cabins as $cabin) {
         if ($cabin->pivot->cabin_number == $cabin->pivot->cabin_booked) {
             $full++;
         }
     }
     if ($full == Cabin::all()->count()) {
         $cruise->status = 1;
         $cruise->save();
     }
     return view('user.reservation', ['cruise' => $cruise, 'cabin' => $cabin, 'amenities' => $reservation->amenities()->get(), 'reservation' => $reservation])->with('status', 'Payment succcess!');
 }