public decimal GetTaxRate(Customer customer, CartItemCollection cartItems, IEnumerable <OrderOption> orderOptions)
{
if (!customer.HasAtLeastOneAddress() || !cartItems.Any())
{
return(0m);
}
// Return the cached value if it's present and still valid
string lastCartHash = HttpContext.Current.Items["TaxCloud.CartHash"] as string;
decimal?lastTaxAmount = HttpContext.Current.Items["TaxCloud.TaxAmount"] as decimal?;
string currentCartHash = GetCartHash(cartItems, customer, orderOptions);
if (lastTaxAmount != null && currentCartHash == lastCartHash)
{
return(lastTaxAmount.Value);
}
// Create line items for all cart items and shipping selections
decimal taxAmount = 0M;
List <CouponObject> CouponList = cartItems.CouponList;
List <QDObject> QuantityDiscountList = cartItems.QuantityDiscountList;
if (Shipping.GetDistinctShippingAddressIDs(cartItems).Count == 1)
{
IEnumerable <net.taxcloud.api.CartItem> refCartitems = ConvertCartItems(cartItems, customer);
net.taxcloud.api.Address destAddress = ConvertAddress(customer.PrimaryShippingAddress);
refCartitems = refCartitems.Concat(CreateCartShippingLineItem(customer, cartItems, orderOptions)).Concat(CreateOrderOptionLineItems(orderOptions));
taxAmount = lookupTaxRate(customer.CustomerID.ToString(), refCartitems.ToArray(), refOrigin, destAddress);
}
else
{
List <int> shipAddresses = Shipping.GetDistinctShippingAddressIDs(cartItems);
foreach (int _addressID in shipAddresses)
{
net.taxcloud.api.Address destAddress = ConvertAddress(_addressID);
IEnumerable <CartItem> tmpcic = cartItems.Where(r => r.ShippingAddressID == _addressID);
IEnumerable <net.taxcloud.api.CartItem> refCartitems = ConvertCartItems(tmpcic, customer, CouponList, QuantityDiscountList);
refCartitems = refCartitems.Concat(CreateCartShippingLineItem(customer, tmpcic, orderOptions));
if (_addressID == customer.PrimaryShippingAddressID)
{
refCartitems = refCartitems.Concat(CreateOrderOptionLineItems(orderOptions));
}
taxAmount += lookupTaxRate(customer.CustomerID.ToString(), refCartitems.ToArray(), refOrigin, destAddress);
}
}
//Cache the tax amount
HttpContext.Current.Items["TaxCloud.CartHash"] = currentCartHash;
HttpContext.Current.Items["TaxCloud.TaxAmount"] = taxAmount;
return(taxAmount);
}
static public bool HasFreeShippingComponents(CartItemCollection CartItems)
{
// CartItemCollection inherits from List, so .Count in C# doesn't directly
// translate to LINQ in VB. Use .Where(Func predicate).Count() instead...
return(CartItems.Where(ci => ci.FreeShipping).Count() > 0);
}