/// <summary>
/// Calculate the tax and shipping cost for the order.
/// </summary>
private void CalculateTaxAndShipping(CouponInfo coupon)
{
if (Order != null)
{
List <ItemInfo> cartItems = CurrentCart.GetItems(PortalId, StoreSettings.SecureCookie);
IShippingInfo shippingInfo;
// Calculate Shipping if enabled
IShippingProvider shippingProvider = StoreController.GetShippingProvider(StoreSettings.ShippingName);
if (StoreSettings.NoDelivery || Shipping == ShippingMode.None || ApplyFreeShipping(cartItems, ShippingAddress.CountryCode))
{
shippingInfo = shippingProvider.GetFreeShipping();
}
else
{
shippingInfo = shippingProvider.CalculateShippingFee(PortalId, BillingAddress, ShippingAddress, cartItems);
}
if (shippingInfo == null)
{
plhCheckout.Visible = false;
lblError.Text = String.Format(Localization.GetString("ErrorShippingRates", LocalResourceFile), StoreSettings.DefaultEmailAddress);
plhError.Visible = true;
return;
}
plhCheckout.Visible = true;
plhError.Visible = false;
// Check for coupon validity
bool couponIsValid = false;
if (StoreSettings.AllowCoupons)
{
int couponID = Order.CouponID;
if (couponID != Null.NullInteger)
{
if (coupon == null || coupon.CouponID != couponID)
{
CouponController couponController = new CouponController();
coupon = couponController.GetCoupon(PortalId, couponID);
}
couponIsValid = ValidateCoupon(coupon, Order);
}
divStoreCheckoutCoupon.Visible = true;
}
else
{
divStoreCheckoutCoupon.Visible = false;
}
// Apply Discount if coupon is valid
if (couponIsValid)
{
decimal discountTotal = 0;
switch (coupon.DiscountType)
{
case CouponDiscount.Percentage:
decimal discountPercentage = Convert.ToDecimal(coupon.DiscountPercentage) / 100;
foreach (ItemInfo cartItem in cartItems)
{
switch (coupon.ApplyTo)
{
case CouponApplyTo.Order:
cartItem.Discount = cartItem.SubTotal * discountPercentage;
discountTotal += cartItem.Discount;
break;
case CouponApplyTo.Category:
if (ValidateCategoryCoupon(coupon, cartItem.CategoryID))
{
cartItem.Discount = cartItem.SubTotal * discountPercentage;
discountTotal += cartItem.Discount;
}
break;
case CouponApplyTo.Product:
if (cartItem.ProductID == coupon.ItemID)
{
cartItem.Discount = cartItem.SubTotal * discountPercentage;
discountTotal += cartItem.Discount;
}
break;
}
}
break;
case CouponDiscount.FixedAmount:
int itemsCount = cartItems.Count;
foreach (ItemInfo cartItem in cartItems)
{
switch (coupon.ApplyTo)
{
case CouponApplyTo.Order:
cartItem.Discount = coupon.DiscountAmount / itemsCount;
discountTotal = coupon.DiscountAmount;
break;
case CouponApplyTo.Category:
if (ValidateCategoryCoupon(coupon, cartItem.CategoryID))
{
cartItem.Discount = coupon.DiscountAmount * cartItem.Quantity;
discountTotal += cartItem.Discount;
}
break;
case CouponApplyTo.Product:
if (cartItem.ProductID == coupon.ItemID)
{
cartItem.Discount = coupon.DiscountAmount * cartItem.Quantity;
discountTotal += cartItem.Discount;
}
break;
}
}
break;
case CouponDiscount.FreeShipping:
discountTotal = shippingInfo.Cost;
// If Free Shipping exclude amount before tax computation!
shippingInfo.Cost = 0;
break;
}
Order.Discount = -discountTotal;
lblDiscount.Text = Order.Discount.ToString("C", _localFormat);
tbDiscount.Visible = Order.Discount > 0;
}
else
{
// Reset order discount
Order.CouponID = Null.NullInteger;
Order.Discount = Null.NullDecimal;
foreach (ItemInfo cartItem in cartItems)
{
cartItem.Discount = 0;
}
tbDiscount.Visible = false;
}
// Add Surcharges if any
decimal fixedSurcharge = PaymentControl.SurchargeFixed;
decimal percentSurcharge = PaymentControl.SurchargePercent;
if (fixedSurcharge != 0 || percentSurcharge != 0)
{
Order.ShippingCost = shippingInfo.Cost + fixedSurcharge + ((Order.OrderNetTotal + shippingInfo.Cost + fixedSurcharge) * (percentSurcharge / 100));
shippingInfo.Cost = Order.ShippingCost;
}
else
{
Order.ShippingCost = shippingInfo.Cost;
}
plhShippingCheckout.Visible = Order.ShippingCost > 0;
// Calculate Tax Amount
ITaxProvider taxProvider = StoreController.GetTaxProvider(StoreSettings.TaxName);
ITaxInfo taxInfo = taxProvider.CalculateSalesTax(PortalId, cartItems, shippingInfo, BillingAddress);
if (taxInfo.ShowTax && taxInfo.SalesTax > 0)
{
plhTaxCheckout.Visible = true;
Order.TaxTotal = taxInfo.SalesTax;
Order.ShippingTax = taxInfo.ShippingTax;
}
else
{
plhTaxCheckout.Visible = false;
Order.TaxTotal = 0;
Order.ShippingTax = 0;
}
}
}
