public void CalculateTax(Cart cart)
{
// TODO: this doesn't take into account discounts
decimal taxAmount = 0;
if (cart.OrderInfo.TaxZoneGuid == Guid.Empty)
{
GeoCountry country = new GeoCountry(cart.OrderInfo.BillingCountry);
GeoZone taxZone = GeoZone.GetByCode(country.Guid, cart.OrderInfo.BillingState);
if (taxZone != null)
{
cart.OrderInfo.TaxZoneGuid = taxZone.Guid;
}
}
if (cart.OrderInfo.TaxZoneGuid != Guid.Empty)
{
Collection <TaxRate> taxRates = TaxRate.GetTaxRates(this.SiteGuid, cart.OrderInfo.TaxZoneGuid);
if (taxRates.Count > 0)
{
foreach (CartOffer offer in cart.CartOffers)
{
offer.Tax = 0;
foreach (TaxRate taxRate in taxRates)
{
if (offer.TaxClassGuid == taxRate.TaxClassGuid)
{
offer.Tax += (taxRate.Rate * (offer.OfferPrice * offer.Quantity));
offer.Save();
taxAmount += offer.Tax;
//break;
}
}
}
}
}
cart.TaxTotal = Math.Round(taxAmount, this.RoundingDecimalPlaces, this.RoundingMode);
if (cart.TaxTotal < 0)
{
cart.TaxTotal = 0;
}
cart.Save();
}