/// Builds a lookup table of tax addresses keyed by shipment id
/// </summary>
/// <param name="order">The order</param>
/// <returns>A lookup table of tax addresses</returns>
public static Dictionary <int, TaxAddress> GenerateAddressLookup(Order order)
{
Dictionary <int, TaxAddress> addressLookup = new Dictionary <int, TaxAddress>();
addressLookup[0] = new TaxAddress(order.BillToAddress1, order.BillToCity, order.BillToProvince, order.BillToPostalCode);
foreach (OrderShipment shipment in order.Shipments)
{
addressLookup[shipment.OrderShipmentId] = new TaxAddress(shipment.ShipToAddress1, shipment.ShipToCity, shipment.ShipToProvince, shipment.ShipToPostalCode);
}
return(addressLookup);
}
public TaxInfo GetTaxInfo(int shipmentId)
{
if (!_TaxAddressLookup.ContainsKey(shipmentId))
{
throw new ArgumentException("shipmentId is not a valid value", "shipmentId");
}
TaxAddress taxAddress = _TaxAddressLookup[shipmentId];
string cacheKey = taxAddress.CacheKey;
if (!_TaxInfoLookup.ContainsKey(cacheKey))
{
_TaxInfoLookup[cacheKey] = GetTaxRate(taxAddress);
}
return(_TaxInfoLookup[cacheKey]);
}
/// <summary>
/// Get the shipping address for the specified shipment
/// </summary>
/// <param name="basket">The basket</param>
/// <param name="shipmentId">The shipment to get shipping address for</param>
/// <param name="billingAddress">The billing address</param>
/// <returns>The shipping address for the specified shipment</returns>
private static TaxAddress GetShippingAddress(Basket basket, int shipmentId, TaxAddress billingAddress)
{
// LOCATE THE SPECIFIED SHIPMENT
int index = basket.Shipments.IndexOf(shipmentId);
if (index < 0)
{
throw new ArgumentOutOfRangeException("shipmentId");
}
// CHECK SHIPPING ADDRESS
Address shippingAddress = basket.Shipments[index].Address;
if (shippingAddress.IsValid)
{
// VALID SHIPPING ADDRESS, CREATE TAXADDRESS INSTANCE
return(new TaxAddress(shippingAddress.Address1, shippingAddress.City, shippingAddress.Province, shippingAddress.PostalCode));
}
else
{
// INVALID SHIPPING ADDRESS, DEFAULT TO BILLING ADDRESS
return(billingAddress);
}
}
/// <summary>
/// Gets the tax rate that applies to the given address
/// </summary>
/// <param name="address">The address to find tax rate for</param>
/// <returns>A TaxInfo structure that details the applicable tax</returns>
/// <remarks>If no tax applies to the address, null is returned</remarks>
private TaxInfo GetTaxRate(TaxAddress address)
{
// INITIALIZE TAX RATE AND SKU VALUES
decimal taxRate = 0M;
string taxSku = string.Empty;
// ONLY WASHINGTON ADDRESS WILL HAVE A TAX RATE
if (address.Province == "WA")
{
// PREPARE TAX RATE REQUEST
//http://dor.wa.gov/AddressRates.aspx?output=xml&addr=6500%20%20Linderson%20way&city=&zip=98501
StringBuilder requestBuilder = new StringBuilder();
requestBuilder.Append("http://dor.wa.gov/AddressRates.aspx?output=xml");
requestBuilder.Append("&addr=").Append(HttpUtility.UrlEncode(address.StreetAddress));
requestBuilder.Append("&city=").Append(HttpUtility.UrlEncode(address.City));
requestBuilder.Append("&zip=").Append(HttpUtility.UrlEncode(address.PostalCode));
// LOG THE REQUEST
if (this._UseDebug)
{
Logger.WriteProviderLog("WATax", "Send", requestBuilder.ToString());
}
// SEND REQUEST
string xmlResponse = HttpClient.DoGetRequest(requestBuilder.ToString());
// LOG THE RESPONSE
if (this._UseDebug)
{
Logger.WriteProviderLog("WATax", "Receive", xmlResponse);
}
// LOAD THE RESPONSE XML
XmlDocument response = new XmlDocument();
if (!string.IsNullOrEmpty(xmlResponse))
{
try
{
response.LoadXml(xmlResponse);
}
catch (XmlException xmlex)
{
Logger.Error("Error reading tax rate response from WA Department of Revenue.", xmlex);
}
}
// LOOK FOR TAX RATE
XmlNode responseNode = response.SelectSingleNode("response");
if (responseNode != null)
{
XmlAttribute rateAttribute = responseNode.Attributes["rate"];
if (rateAttribute != null)
{
taxRate = AlwaysConvert.ToDecimal(rateAttribute.Value);
}
}
// LOOK FOR TAX "SKU"
XmlNode rateNode = responseNode.SelectSingleNode("rate");
if (rateNode != null)
{
XmlAttribute nameAttribute = rateNode.Attributes["name"];
taxSku = nameAttribute.Value;
}
}
// IF THERE IS NO APPLICABLE TAX RETURN NULL
if (taxRate == 0)
{
return(null);
}
// RETURN THE TAXINFO DATA
return(new TaxInfo(this._TaxName, taxSku, taxRate));
}
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