/// <summary>
/// Calculates and applies taxes for the given order
/// </summary>
/// <param name="basket">The order to calculate taxes on.</param>
/// <returns>The total amount of tax applied.</returns>
/// <remarks>Any pre-existing tax line items must be removed from the order before the calculation.</remarks>
public override LSDecimal Recalculate(Order order)
{
if (order == null)
{
throw new ArgumentNullException("order");
}
// CREATE THE DOR GATEWAY INSTANCE
DorGateway gateway = new DorGateway(order, this.TaxName, this.UseDebugMode);
// BUILD A DICTIONARY OF TAXABLE TOTALS BY SHIPMENT
Dictionary <int, decimal> shipmentTotals = new Dictionary <int, decimal>();
// LOOP ITEMS IN BASKET TO CALCULATE TAX
OrderItemCollection newTaxItems = new OrderItemCollection();
foreach (OrderItem item in order.Items)
{
// SEE IF ITEM HAS A TAX CODE THAT APPLIES
if (item.TaxCodeId > 0 && this.TaxCodes.Contains(item.TaxCodeId))
{
if (shipmentTotals.ContainsKey(item.OrderShipmentId))
{
shipmentTotals[item.OrderShipmentId] += (decimal)item.ExtendedPrice;
}
else
{
shipmentTotals[item.OrderShipmentId] = (decimal)item.ExtendedPrice;
}
}
}
// LOOP TAXABLE SHIPMENT TOTALS
LSDecimal totalTax = 0;
foreach (int shipmentId in shipmentTotals.Keys)
{
// SEE IF THERE IS A TAXINFO INSTANCE FOR THIS ITEM
TaxInfo taxInfo = gateway.GetTaxInfo(shipmentId);
if (taxInfo != null)
{
// A TAXINFO STRUCTURE EXISTS, SO CREATE TAX ITEM AND ADD TO BASKET
OrderItem taxItem = TaxUtility.GenerateOrderItem(order.OrderId, shipmentId, shipmentTotals[shipmentId], taxInfo);
totalTax += taxItem.ExtendedPrice;
order.Items.Add(taxItem);
}
}
// SAVE ORDER
order.Items.Save();
// return total tax added to basekt
return(newTaxItems.TotalPrice());
}
/// <summary>
/// Calculates tax for the given basket
/// </summary>
/// <param name="basket">The basket</param>
/// <param name="save">If true, items added to the basket are saved</param>
/// <returns>Tax items are added to the basket and total calculated tax is returned</returns>
public LSDecimal Calculate(Basket basket, bool save)
{
// CREATE THE DOR GATEWAY INSTANCE
DorGateway gateway = new DorGateway(basket, this.TaxName, this.UseDebugMode);
// BUILD A DICTIONARY OF TAXABLE TOTALS BY SHIPMENT
Dictionary <int, decimal> shipmentTotals = new Dictionary <int, decimal>();
// LOOP ITEMS IN BASKET TO CALCULATE TAX
BasketItemCollection newTaxItems = new BasketItemCollection();
foreach (BasketItem item in basket.Items)
{
// SEE IF ITEM HAS A TAX CODE THAT APPLIES
if (item.TaxCodeId > 0 && this.TaxCodes.Contains(item.TaxCodeId))
{
if (shipmentTotals.ContainsKey(item.BasketShipmentId))
{
shipmentTotals[item.BasketShipmentId] += (decimal)item.ExtendedPrice;
}
else
{
shipmentTotals[item.BasketShipmentId] = (decimal)item.ExtendedPrice;
}
}
}
// LOOP TAXABLE SHIPMENT TOTALS
LSDecimal totalTax = 0;
foreach (int shipmentId in shipmentTotals.Keys)
{
// SEE IF THERE IS A TAXINFO INSTANCE FOR THIS ITEM
TaxInfo taxInfo = gateway.GetTaxInfo(shipmentId);
if (taxInfo != null)
{
// A TAXINFO STRUCTURE EXISTS, SO CREATE TAX ITEM AND ADD TO BASKET
BasketItem taxItem = TaxUtility.GenerateBasketItem(basket.BasketId, shipmentId, shipmentTotals[shipmentId], taxInfo);
totalTax += taxItem.ExtendedPrice;
basket.Items.Add(taxItem);
}
}
// SAVE BASKET IF INDICATED
if (save)
{
basket.Items.Save();
}
// return total tax added to basekt
return(totalTax);
}