//supply the actual class that will handle the payment and courier
// example calls
// Create(new PaymentHandler1(), new CourierHandler1())
// Create(new PaymentHandler2(), new CourierHandler2())
// the right class can be chossen from the caller based on config string or defined web provider class
public bool Create(IPaymentHandler paymentHandler, ICourierHandler courierHandler)
{
if (paymentHandler == null || courierHandler == null)
{
return(false);
}
// check if the customer has products in the cart
CartModel cartModel = new CartModel();
IEnumerable <Cart> carts = cartModel.Get(base.Customer.Name);
if (carts == null && carts.Count() <= 0)
{
return(false);
}
// calculate the amount have to pay
double dAmount = carts.Sum(c => c.Quantity * c.UnitPrice);
if (dAmount <= 0)
{
return(false);
}
// check for discount
DiscountModel discountModel = new DiscountModel();
Discount discount = discountModel.Get(base.Customer.Name);
if (discount != null && discount.Percentage != 0)
{
dAmount -= Math.Round((dAmount * discount.Percentage) / 100, 2);
System.Diagnostics.Debug.Assert(dAmount > 0);
}
//try to make a payment
if (!paymentHandler.MakePayment(base.Customer.Name, dAmount))
{
return(false);
}
//make the cart into an order
OrderModel orderModel = new OrderModel();
string sID = orderModel.Add(base.Customer.Name, base.Customer.Address, dAmount);
if (sID == null)
{
return(false);
}
OrderLinesModel orderLinesModel = new OrderLinesModel();
foreach (Cart cart in carts)
{
if (!orderLinesModel.Add(sID, cart.ProductCode, cart.Quantity, cart.UnitPrice))
{
orderModel.Delete(sID);
orderLinesModel.Delete(sID);
return(false);
}
}
//clear the cart for this customer
cartModel.Delete(base.Customer.Name);
// get the order and the order items
Order order = orderModel.Get(sID);
IEnumerable <OrderLine> orderLines = orderLinesModel.GetAll(sID);
// send email confirmation to the customer
EmailHandler emailhandler = new EmailHandler();
emailhandler.SendOrderConfirmation(base.Customer, order, orderLines);
// Notify the Courier
courierHandler.Deliver(order, orderLines);
return(true);
}
