public ClientMenuViewModel(User user, Reservation reservation, FastObservableCollection <OrderedDish> orderedDishes = null)
{
_user = user;
_reservation = reservation;
_rootViewModel = ViewModelManager.GetFirstOrDefaultInstance <MainWindowViewModel>();
OrderedDishes.AutomaticallyDispatchChangeNotifications = true;
// передаем в конструктор ссылку на собираемую коллекцию заказанных блюд
_sumCalculator = new OrderedSumCalculator(OrderedDishes);
AddCommand = new Command(OnAddCommandExecute);
SelectionChangedCommand = new Command(OnSelectionChangedCommandExecute);
DeleteCommand = new Command(OnDeleteCommandExecute, OnDeleteCommandCanExecute);
BackCommand = new Command(OnBackCommandExecute);
NextCommand = new Command(OnNextCommandExecute, OnNextCommandCanExecute);
RefreshDishesCollection();
if (orderedDishes != null)
{
OrderedDishes = orderedDishes;
TotalSum = _sumCalculator.GetCurrentOrderedSum();
}
else
{
OrderedDishes.Clear();
}
}
private void RefreshOrdersWithReservationsCollection()
{
OrdersWithReservations.Clear();
OrderedDishes.Clear();
var userOrders = _unitOfWork.Orders.GetAll()
.Join(_unitOfWork.Reservations.GetAll(),
order => order.ReservationId,
reservation => reservation.Id,
(o, r) => new OrderWithReservationInfo
{
OrderId = o.Id,
TableId = r.TableId,
UserId = o.UserId,
Day = r.Day.ToLongDateString(),
FirstTime = r.FirstTime.ToShortTimeString(),
LastTime = r.LastTime.ToShortTimeString()
})
.Where(or => or.UserId == _user.Id);
foreach (var us in userOrders)
{
OrdersWithReservations.Add(us);
}
}
private void OnSelectAnotherOrderCommandExecute()
{
if (SelectedOrderWithReservation != null)
{
OrderedDishes.Clear();
// получаем все заказанные блюда
var orderedDishes = _unitOfWork.OrderedDishes.GetAll()
.Where(od => od.OrderId == SelectedOrderWithReservation.OrderId);
// добавляем в коллекцию
OrderedDishes.AddItems(orderedDishes);
TotalSum = _orderedSumCalculator.GetCurrentOrderedSum();
}
}