public static OrderSortingOption GetOpposite(this OrderSortingOption orderSortingOption)
{
switch (orderSortingOption)
{
case OrderSortingOption.IdDescending:
return(OrderSortingOption.IdAscending);
case OrderSortingOption.IdAscending:
return(OrderSortingOption.IdDescending);
case OrderSortingOption.DateDescending:
return(OrderSortingOption.DateAscending);
case OrderSortingOption.DateAscending:
return(OrderSortingOption.DateDescending);
case OrderSortingOption.TotalDescending:
return(OrderSortingOption.TotalAscending);
case OrderSortingOption.TotalAscending:
return(OrderSortingOption.TotalDescending);
case OrderSortingOption.StateAscending:
return(OrderSortingOption.StateDescending);
case OrderSortingOption.StateDescending:
return(OrderSortingOption.StateAscending);
default:
return(OrderSortingOption.None);
}
}
public static IOrderedEnumerable <Order> SortBy(this IEnumerable <Order> orders,
OrderSortingOption sortingOption)
{
switch (sortingOption)
{
default:
case OrderSortingOption.None:
case OrderSortingOption.DateAscending:
return(orders.OrderBy(o => o.Date));
case OrderSortingOption.DateDescending:
return(orders.OrderByDescending(o => o.Date));
case OrderSortingOption.IdAscending:
return(orders.OrderBy(o => o.Id));
case OrderSortingOption.IdDescending:
return(orders.OrderByDescending(o => o.Id));
case OrderSortingOption.TotalAscending:
return(orders.OrderBy(o => o.Total));
case OrderSortingOption.TotalDescending:
return(orders.OrderByDescending(o => o.Total));
case OrderSortingOption.StateAscending:
return(orders.OrderBy(o => o.State));
case OrderSortingOption.StateDescending:
return(orders.OrderByDescending(o => o.State));
}
}
public async Task <IActionResult> Index(OrderSortingType orderSortingType, OrderSortingOption previousSortingOption)
{
OrderSortingOption newSortingOption = OrdersSortingLogic.GetNewSortingOption(orderSortingType, previousSortingOption);
OrdersListViewModel ordersListViewModel = new OrdersListViewModel();
ordersListViewModel.PreviousSortingOption = newSortingOption;
string userId = await GetCurrentUserIdAsync();
ordersListViewModel.Orders = orderRepository
.GetUserOrders(userId)
.SortBy(newSortingOption);
return(View(ordersListViewModel));
}
//TODO: refactor! maybe replace with state pattern
public static OrderSortingOption GetNewSortingOption(OrderSortingType orderSortingType, OrderSortingOption previousSortingOption)
{
OrderSortingOption newSortingOption = OrderSortingOption.None;
if (orderSortingType != OrderSortingType.None && previousSortingOption != OrderSortingOption.None)
{
switch (orderSortingType)
{
case OrderSortingType.Id:
if (previousSortingOption == OrderSortingOption.IdAscending || previousSortingOption == OrderSortingOption.IdDescending)
{
newSortingOption = previousSortingOption.GetOpposite();
}
break;
default:
case OrderSortingType.Date:
if (previousSortingOption == OrderSortingOption.DateAscending || previousSortingOption == OrderSortingOption.DateDescending)
{
newSortingOption = previousSortingOption.GetOpposite();
}
break;
case OrderSortingType.Total:
if (previousSortingOption == OrderSortingOption.TotalAscending || previousSortingOption == OrderSortingOption.TotalDescending)
{
newSortingOption = previousSortingOption.GetOpposite();
}
break;
case OrderSortingType.State:
if (previousSortingOption == OrderSortingOption.TotalAscending || previousSortingOption == OrderSortingOption.TotalDescending)
{
newSortingOption = previousSortingOption.GetOpposite();
}
break;
}
if (newSortingOption == OrderSortingOption.None)
{
previousSortingOption = OrderSortingOption.None;
}
}
if (previousSortingOption == OrderSortingOption.None && orderSortingType != OrderSortingType.None)
{
switch (orderSortingType)
{
case OrderSortingType.Id:
newSortingOption = OrderSortingOption.IdDescending;
break;
default:
case OrderSortingType.Date:
newSortingOption = OrderSortingOption.DateDescending;
break;
case OrderSortingType.Total:
newSortingOption = OrderSortingOption.TotalDescending;
break;
case OrderSortingType.State:
newSortingOption = OrderSortingOption.StateDescending;
break;
}
}
return(newSortingOption);
}