public static IBookOrderLine Add(this IBookOrder order, IBook book, int quantity)
{
var session = EntityHelper.GetSession(order);
var line = session.NewEntity <IBookOrderLine>();
line.Order = order;
line.Book = book;
line.Quantity = quantity;
line.Price = book.Price;
order.Lines.Add(line);
return(line);
}
//Schedules update LINQ-based command that will recalculate totals at the end of SaveChanges transaction
public static void ScheduleUpdateTotal(this IBookOrder order)
{
// only open orders; completed order might have coupon discount applied
if (order.Status != OrderStatus.Open)
{
return;
}
var session = EntityHelper.GetSession(order);
var orderTotalQuery = from bol in session.EntitySet <IBookOrderLine>()
where bol.Order.Id == order.Id
group bol by bol.Order.Id into orderUpdate
select new { Id = orderUpdate.Key, Total = orderUpdate.Sum(line => line.Price * line.Quantity) };
session.ScheduleUpdate <IBookOrder>(orderTotalQuery, CommandSchedule.TransactionEnd);
}
public static BookOrder ToModel(this IBookOrder order, bool details = false)
{
if (order == null)
{
return(null);
}
var ord = new BookOrder()
{
Id = order.Id, CreatedOn = order.CreatedOn, Total = order.Total, Status = order.Status, UserId = order.User.Id, UserName = order.User.DisplayName
};
if (details)
{
ord.Items = order.Lines.Select(l => l.ToModel()).ToList();
}
return(ord);
}
public static void CompleteOrder(this IBookOrder order, string couponCode = null)
{
var session = EntityHelper.GetSession(order);
order.Total = order.Lines.Sum(line => line.Price * line.Quantity);
if (!string.IsNullOrWhiteSpace(couponCode))
{
var entCoupon = LookupCoupon(session, couponCode);
session.Context.ThrowIfNull(entCoupon, ClientFaultCodes.ObjectNotFound, "Coupon", "Coupon with code '{0}' not found.", couponCode);
if (entCoupon != null && entCoupon.ExpiresOn >= DateTime.Now && entCoupon.AppliedOn == null)
{
entCoupon.AppliedOn = DateTime.Now;
order.Total = (decimal)(((double)order.Total) * ((100 - entCoupon.DiscountPerc) / 100.0));
}
}
order.Status = OrderStatus.Completed;
}
// Static method computing order summary
public static string GetOrderSummary(IBookOrder order)
{
return order.CreatedOn.ToString("s") + " " + order.User.DisplayName + ", Total: " + order.Total.ToString("###.##");
}
public static string GetOrderDisplay(IBookOrder order)
{
return string.Format("{0}, {1} items.", order.User.DisplayName, order.Lines.Count);
}
public static string GetOrderDisplay(IBookOrder order)
{
return(string.Format("{0}, {1} items.", order.User.DisplayName, order.Lines.Count));
}
// Static method computing order summary
public static string GetOrderSummary(IBookOrder order)
{
return(order.CreatedOn.ToString("s") + " " + order.User.DisplayName + ", Total: " + order.Total.ToString("###.##"));
}
