/// <summary>
/// Get a response from Avalara API
/// </summary>
/// <param name="taxRequest">Tax calculation request</param>
/// <returns>The response from Avalara API</returns>
public AvalaraTaxResult GetTaxResult(AvalaraTaxRequest taxRequest)
{
taxRequest.Commit = true;
taxRequest.DocCode = Guid.NewGuid().ToString();
taxRequest.DocDate = DateTime.UtcNow.ToString("yyyy-MM-dd");
taxRequest.CompanyCode = _avalaraTaxSettings.CompanyCode;
taxRequest.Client = AVATAX_CLIENT;
taxRequest.DetailLevel = DetailLevel.Tax;
taxRequest.DocType = _avalaraTaxSettings.CommitTransactions ? DocType.SalesInvoice : DocType.SalesOrder;
var streamTaxRequest = Encoding.Default.GetBytes(JsonConvert.SerializeObject(taxRequest));
var serviceUrl = _avalaraTaxSettings.IsSandboxEnvironment ? "https://development.avalara.net" : "https://avatax.avalara.net";
var login = string.Format("{0}:{1}", _avalaraTaxSettings.AccountId, _avalaraTaxSettings.LicenseKey);
var authorization = Convert.ToBase64String(Encoding.ASCII.GetBytes(login));
var request = (HttpWebRequest)WebRequest.Create(string.Format("{0}/1.0/tax/get", serviceUrl));
request.Headers.Add(HttpRequestHeader.Authorization, string.Format("Basic {0}", authorization));
request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = streamTaxRequest.Length;
using (var stream = request.GetRequestStream())
{
stream.Write(streamTaxRequest, 0, streamTaxRequest.Length);
}
try
{
var httpResponse = (HttpWebResponse)request.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
return(JsonConvert.DeserializeObject <AvalaraTaxResult>(streamReader.ReadToEnd()));
}
}
catch (WebException ex)
{
var httpResponse = (HttpWebResponse)ex.Response;
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
return(JsonConvert.DeserializeObject <AvalaraTaxResult>(streamReader.ReadToEnd()));
}
}
}
/// <summary>
/// Gets tax rate
/// </summary>
/// <param name="calculateTaxRequest">Tax calculation request</param>
/// <returns>Tax</returns>
public CalculateTaxResult GetTaxRate(CalculateTaxRequest calculateTaxRequest)
{
if (calculateTaxRequest.Address == null)
{
return new CalculateTaxResult {
Errors = new List <string>()
{
"Address is not set"
}
}
}
;
string cacheKey = string.Format(TAXRATE_KEY,
!string.IsNullOrEmpty(calculateTaxRequest.Address.Address1) ? calculateTaxRequest.Address.Address1 : string.Empty,
!string.IsNullOrEmpty(calculateTaxRequest.Address.City) ? calculateTaxRequest.Address.City : string.Empty,
calculateTaxRequest.Address.StateProvince != null ? calculateTaxRequest.Address.StateProvince.Id : 0,
calculateTaxRequest.Address.Country != null ? calculateTaxRequest.Address.Country.Id : 0,
!string.IsNullOrEmpty(calculateTaxRequest.Address.ZipPostalCode) ? calculateTaxRequest.Address.ZipPostalCode : string.Empty);
// we don't use standard way _cacheManager.Get() due the need write errors to CalculateTaxResult
if (_cacheManager.IsSet(cacheKey))
{
return new CalculateTaxResult {
TaxRate = _cacheManager.Get <decimal>(cacheKey)
}
}
;
var address = new Address
{
AddressCode = calculateTaxRequest.Address.Id.ToString(),
Line1 = calculateTaxRequest.Address.Address1,
Line2 = calculateTaxRequest.Address.Address2,
City = calculateTaxRequest.Address.City,
Region = calculateTaxRequest.Address.StateProvince != null ? calculateTaxRequest.Address.StateProvince.Abbreviation : null,
Country = calculateTaxRequest.Address.Country != null ? calculateTaxRequest.Address.Country.TwoLetterIsoCode : null,
PostalCode = calculateTaxRequest.Address.ZipPostalCode
};
//information about product
var taxCategory = _taxCategoryService.GetTaxCategoryById(calculateTaxRequest.TaxCategoryId);
var line = new Line
{
LineNo = "1",
DestinationCode = calculateTaxRequest.Address.Id.ToString(),
OriginCode = calculateTaxRequest.Address.Id.ToString(),
ItemCode = calculateTaxRequest.Product != null ? calculateTaxRequest.Product.Sku : null,
Description = calculateTaxRequest.Product != null ? calculateTaxRequest.Product.ShortDescription : null,
TaxCode = taxCategory != null ? taxCategory.Name : null,
Qty = 1,
Amount = calculateTaxRequest.Price
};
//tax exemption
var exemptionReason = string.Empty;
if (calculateTaxRequest.Product != null && calculateTaxRequest.Product.IsTaxExempt)
{
exemptionReason = string.Format("Exempt-product-{0}", calculateTaxRequest.Product.Sku);
}
else
if (calculateTaxRequest.Customer != null)
{
if (calculateTaxRequest.Customer.IsTaxExempt)
{
exemptionReason = string.Format("Exempt-customer-{0}", calculateTaxRequest.Customer.CustomerGuid.ToString());
}
else
{
var exemptRole = calculateTaxRequest.Customer.CustomerRoles.FirstOrDefault(role => role.Active && role.TaxExempt);
exemptionReason = exemptRole != null?string.Format("Exempt-role-{0}", exemptRole.Name) : string.Empty;
}
}
var taxRequest = new AvalaraTaxRequest
{
CustomerCode = calculateTaxRequest.Customer != null?calculateTaxRequest.Customer.CustomerGuid.ToString() : null,
ExemptionNo = !string.IsNullOrEmpty(exemptionReason) ? exemptionReason : null,
Addresses = new [] { address },
Lines = new [] { line }
};
var result = GetTaxResult(taxRequest);
if (result == null)
{
return new CalculateTaxResult {
Errors = new List <string>()
{
"Bad request"
}
}
}
;
if (result.ResultCode != SeverityLevel.Success)
{
return new CalculateTaxResult {
Errors = result.Messages.Select(message => message.Summary).ToList()
}
}
;
var taxRate = result.TaxLines != null && result.TaxLines.Any() ? result.TaxLines[0].Rate * 100 : 0;
_cacheManager.Set(cacheKey, taxRate, 60);
return(new CalculateTaxResult {
TaxRate = taxRate
});
}