@RequestMapping(value = "/waiter/bills/{billId}", method = RequestMethod.GET)
  public String showBillInWaiter(
      @PathVariable("billId") String billId, Model uiModel, Locale locale) {

    // warmup stuff
    Bill bill = warmupRestaurant(billId, uiModel);
    Restaurant resto = bill.getDiningTable().getRestaurant();

    List<Order> allPreparedOrders = orderService.findPreparedOrdersForRestaurant(resto);
    uiModel.addAttribute("allPreparedOrders", allPreparedOrders);

    List<Bill> allSubmittedBills = billService.findSubmittedBillsForRestaurant(resto);
    uiModel.addAttribute("allSubmittedBills", allSubmittedBills);

    uiModel.addAttribute(
        "message",
        new Message(
            "info",
            messageSource.getMessage("label_bill_amount", new Object[] {}, locale)
                + ": "
                + bill.getPriceAllOrders()
                + " "
                + messageSource.getMessage("label_currency", new Object[] {}, locale)));

    return "hartigehap/waiter";
  }
 private Bill warmupRestaurant(String billId, Model uiModel) {
   Bill bill = billService.findById(Long.valueOf(billId));
   Collection<Restaurant> restaurants = restaurantService.findAll();
   uiModel.addAttribute("restaurants", restaurants);
   Restaurant restaurant =
       restaurantService.fetchWarmedUp(bill.getDiningTable().getRestaurant().getId());
   uiModel.addAttribute("restaurant", restaurant);
   return bill;
 }
  @RequestMapping(value = "/waiter/bills/{billId}", method = RequestMethod.PUT)
  public String receiveBillEvent(
      @PathVariable("billId") String billId, @RequestParam String event, Model uiModel) {

    Bill bill = warmupRestaurant(billId, uiModel);

    switch (event) {
      case "billHasBeenPaid":
        billHasBeenPaid(bill);
        break;

      default:
        log.error("Internal error: event " + event + " not recognized");
        break;
    }

    return "redirect:/restaurants/" + bill.getDiningTable().getRestaurant().getId() + "/waiter";
  }