public OrderTransactionBuilder UpdatePricing()
{
var orderPricing = OrderPricing.Compute(m_order);
foreach (var dbOrderItem in m_order.OrderItems)
{
var orderItemPricing = orderPricing.OrderItemPricings.Where(r => r.OrderItemId == dbOrderItem.OrderItemId).Single();
dbOrderItem.NetQuantity = orderItemPricing.NetQuantity;
dbOrderItem.UnitPrice = orderItemPricing.UnitPrice;
dbOrderItem.TotalPrice = orderItemPricing.TotalPrice;
}
_ = AddItemSubtotal(orderPricing.ItemSubtotal - m_order.ItemSubtotal);
_ = AddShipping(orderPricing.Shipping - m_order.Shipping);
_ = AddSalesTax(orderPricing.SalesTax - m_order.SalesTax);
m_order.PretaxAmount = orderPricing.PreTaxAmount;
m_order.TaxableAmount = orderPricing.TaxableAmount;
m_order.TotalAmount = orderPricing.TotalAmount;
return(this);
}
public static OrderPricing Compute(Order dbOrder)
{
var orderPricing = new OrderPricing()
{
OrderItemPricings = new List <OrderItemPricing>()
};
foreach (var dbOrderItem in dbOrder.OrderItems)
{
orderPricing.OrderItemPricings.Add(ComputeOrderItemPricing(dbOrderItem));
}
var shipping = dbOrder.OrderItems.Sum(r => r.NetQuantity) * 5.00m;
orderPricing.Shipping = shipping;
// Compute item subtotal.
//
{
var itemSubtotal = 0m;
foreach (var orderItemPricing in orderPricing.OrderItemPricings)
{
itemSubtotal += orderItemPricing.TotalPrice;
}
orderPricing.ItemSubtotal = itemSubtotal;
}
// Compute pre-tax amount.
//
{
var pretaxAmount = orderPricing.ItemSubtotal + orderPricing.Shipping + dbOrder.Discount;
orderPricing.PreTaxAmount = pretaxAmount;
}
// Compute taxable amount.
//
{
// HACK: Assuming shipping is taxable.
//
var shippingTaxable = true;
decimal taxableAmount;
taxableAmount = shippingTaxable
? orderPricing.ItemSubtotal + orderPricing.Shipping + dbOrder.Discount
: orderPricing.ItemSubtotal + dbOrder.Discount;
orderPricing.TaxableAmount = taxableAmount;
}
// Compute sales tax.
//
{
var salesTax = Math.Round(orderPricing.TaxableAmount * dbOrder.SalesTaxRate, 2, MidpointRounding.AwayFromZero);
orderPricing.SalesTax = salesTax;
}
// Update total amount.
{
var totalAmount = orderPricing.PreTaxAmount + orderPricing.SalesTax;
orderPricing.TotalAmount = totalAmount;
}
return(orderPricing);
}