public async Task <TaxTotalResult> GetTaxTotalAsync(TaxTotalRequest taxTotalRequest)
{
if (_httpContextAccessor.HttpContext.Items.TryGetValue("nop.TaxTotal", out var result) &&
result is (TaxTotalResult taxTotalResult, decimal paymentTax))
{
//short-circuit to avoid circular reference when calculating payment method additional fee during the checkout process
if (!taxTotalRequest.UsePaymentMethodAdditionalFee)
{
return new TaxTotalResult {
TaxTotal = taxTotalResult.TaxTotal - paymentTax
}
}
;
return(taxTotalResult);
}
var taxRates = new SortedDictionary <decimal, decimal>();
var taxTotal = decimal.Zero;
taxTotal += await GetSubtotalTaxTotalAsync(taxRates, taxTotalRequest);
taxTotal += await GetShippingTaxAsync(taxRates, taxTotalRequest);
//short-circuit to avoid circular reference when calculating payment method additional fee during the checkout process
if (!taxTotalRequest.UsePaymentMethodAdditionalFee)
{
return new TaxTotalResult {
TaxTotal = taxTotal
}
}
;
var paymentMethodAdditionalFeeTax = await GetPaymentMethodAdditionalFeeTaxAsync(taxRates, taxTotalRequest);
taxTotal += paymentMethodAdditionalFeeTax;
//add at least one tax rate (0%)
if (!taxRates.Any())
{
taxRates.Add(decimal.Zero, decimal.Zero);
}
if (taxTotal < decimal.Zero)
{
taxTotal = decimal.Zero;
}
taxTotalResult = new TaxTotalResult {
TaxTotal = taxTotal, TaxRates = taxRates,
};
//store values within the scope of the request to avoid duplicate calculations
_httpContextAccessor.HttpContext.Items.TryAdd("nop.TaxTotal", (taxTotalResult, paymentMethodAdditionalFeeTax));
return(taxTotalResult);
}
/// <summary>
/// Gets tax total
/// </summary>
/// <param name="taxTotalRequest">Tax total request</param>
/// <returns>
/// A task that represents the asynchronous operation
/// The task result contains the ax total
/// </returns>
public async Task <TaxTotalResult> GetTaxTotalAsync(TaxTotalRequest taxTotalRequest)
{
//cache tax total within the request
var key = $"nop.TaxTotal-{taxTotalRequest.UsePaymentMethodAdditionalFee}";
if (!(_actionContextAccessor.ActionContext.HttpContext.Items.TryGetValue(key, out var result) &&
result is TaxTotalResult taxTotalResult))
{
//create a transaction
var transaction = await _avalaraTaxManager.CreateTaxTotalTransactionAsync(taxTotalRequest);
if (transaction?.totalTax == null)
{
return new TaxTotalResult {
Errors = new List <string> {
"No response from the service"
}
}
}
;
//and get tax details
taxTotalResult = new TaxTotalResult {
TaxTotal = transaction.totalTax.Value
};
transaction.summary?
.Where(summary => summary.rate.HasValue && summary.tax.HasValue)
.Select(summary => new { Rate = summary.rate.Value * 100, Value = summary.tax.Value })
.ToList().ForEach(taxRate =>
{
if (taxTotalResult.TaxRates.ContainsKey(taxRate.Rate))
{
taxTotalResult.TaxRates[taxRate.Rate] += taxRate.Value;
}
else
{
taxTotalResult.TaxRates.Add(taxRate.Rate, taxRate.Value);
}
});
_actionContextAccessor.ActionContext.HttpContext.Items.TryAdd(key, taxTotalResult);
}
return(taxTotalResult);
}
/// <summary>
/// Gets tax total
/// </summary>
/// <param name="taxTotalRequest">Tax total request</param>
/// <returns>Tax total</returns>
public TaxTotalResult GetTaxTotal(TaxTotalRequest taxTotalRequest)
{
if (!(_httpContextAccessor.HttpContext.Items.TryGetValue("nop.TaxTotal", out var result) && result is TaxTotalResult taxTotalResult))
{
var taxRates = new SortedDictionary <decimal, decimal>();
//order sub total (items + checkout attributes)
_orderTotalCalculationService
.GetShoppingCartSubTotal(taxTotalRequest.ShoppingCart, false, out _, out _, out _, out _, out var orderSubTotalTaxRates);
var subTotalTaxTotal = decimal.Zero;
foreach (var kvp in orderSubTotalTaxRates)
{
var taxRate = kvp.Key;
var taxValue = kvp.Value;
subTotalTaxTotal += taxValue;
if (taxRate > decimal.Zero && taxValue > decimal.Zero)
{
if (!taxRates.ContainsKey(taxRate))
{
taxRates.Add(taxRate, taxValue);
}
else
{
taxRates[taxRate] = taxRates[taxRate] + taxValue;
}
}
}
//shipping
var shippingTax = decimal.Zero;
if (_taxSettings.ShippingIsTaxable)
{
var shippingExclTax = _orderTotalCalculationService
.GetShoppingCartShippingTotal(taxTotalRequest.ShoppingCart, false, out _);
var shippingInclTax = _orderTotalCalculationService
.GetShoppingCartShippingTotal(taxTotalRequest.ShoppingCart, true, out var taxRate);
if (shippingExclTax.HasValue && shippingInclTax.HasValue)
{
shippingTax = shippingInclTax.Value - shippingExclTax.Value;
if (shippingTax < decimal.Zero)
{
shippingTax = decimal.Zero;
}
if (taxRate > decimal.Zero && shippingTax > decimal.Zero)
{
if (!taxRates.ContainsKey(taxRate))
{
taxRates.Add(taxRate, shippingTax);
}
else
{
taxRates[taxRate] = taxRates[taxRate] + shippingTax;
}
}
}
}
//add at least one tax rate (0%)
if (!taxRates.Any())
{
taxRates.Add(decimal.Zero, decimal.Zero);
}
var taxTotal = subTotalTaxTotal + shippingTax;
if (taxTotal < decimal.Zero)
{
taxTotal = decimal.Zero;
}
taxTotalResult = new TaxTotalResult {
TaxTotal = taxTotal, TaxRates = taxRates
};
_httpContextAccessor.HttpContext.Items.TryAdd("nop.TaxTotal", taxTotalResult);
}
//payment method additional fee
if (taxTotalRequest.UsePaymentMethodAdditionalFee && _taxSettings.PaymentMethodAdditionalFeeIsTaxable)
{
var paymentMethodSystemName = taxTotalRequest.Customer != null
? _genericAttributeService.GetAttribute <string>(taxTotalRequest.Customer,
NopCustomerDefaults.SelectedPaymentMethodAttribute, taxTotalRequest.StoreId)
: string.Empty;
var paymentMethodAdditionalFee = _paymentService.GetAdditionalHandlingFee(taxTotalRequest.ShoppingCart, paymentMethodSystemName);
var paymentMethodAdditionalFeeExclTax = _taxService
.GetPaymentMethodAdditionalFee(paymentMethodAdditionalFee, false, taxTotalRequest.Customer, out _);
var paymentMethodAdditionalFeeInclTax = _taxService
.GetPaymentMethodAdditionalFee(paymentMethodAdditionalFee, true, taxTotalRequest.Customer, out var taxRate);
var paymentMethodAdditionalFeeTax = paymentMethodAdditionalFeeInclTax - paymentMethodAdditionalFeeExclTax;
if (paymentMethodAdditionalFeeTax < decimal.Zero)
{
paymentMethodAdditionalFeeTax = decimal.Zero;
}
taxTotalResult.TaxTotal += paymentMethodAdditionalFeeTax;
if (taxRate > decimal.Zero && paymentMethodAdditionalFeeTax > decimal.Zero)
{
if (!taxTotalResult.TaxRates.ContainsKey(taxRate))
{
taxTotalResult.TaxRates.Add(taxRate, paymentMethodAdditionalFeeTax);
}
else
{
taxTotalResult.TaxRates[taxRate] = taxTotalResult.TaxRates[taxRate] + paymentMethodAdditionalFeeTax;
}
}
}
return(taxTotalResult);
}
/// <summary>
/// Ctor
/// </summary>
/// <param name="taxTotalRequest">Tax total request</param>
/// <param name="taxTotalResult">Tax total result</param>
public TaxTotalCalculatedEvent(TaxTotalRequest taxTotalRequest, TaxTotalResult taxTotalResult)
{
TaxTotalRequest = taxTotalRequest;
TaxTotalResult = taxTotalResult;
}
/// <summary>
/// Gets tax total
/// </summary>
/// <param name="taxTotalRequest">Tax total request</param>
/// <returns>
/// A task that represents the asynchronous operation
/// The task result contains the ax total
/// </returns>
public async Task <TaxTotalResult> GetTaxTotalAsync(TaxTotalRequest taxTotalRequest)
{
if (_httpContextAccessor.HttpContext.Items.TryGetValue("nop.TaxTotal", out var result) &&
result is (TaxTotalResult taxTotalResult, decimal paymentTax))
{
//short-circuit to avoid circular reference when calculating payment method additional fee during the checkout process
if (!taxTotalRequest.UsePaymentMethodAdditionalFee)
{
return new TaxTotalResult {
TaxTotal = taxTotalResult.TaxTotal - paymentTax
}
}
;
return(taxTotalResult);
}
var taxRates = new SortedDictionary <decimal, decimal>();
var taxTotal = decimal.Zero;
//order sub total (items + checkout attributes)
var(_, _, _, _, orderSubTotalTaxRates) = await _orderTotalCalculationService
.GetShoppingCartSubTotalAsync(taxTotalRequest.ShoppingCart, false);
var subTotalTaxTotal = decimal.Zero;
foreach (var kvp in orderSubTotalTaxRates)
{
var taxRate = kvp.Key;
var taxValue = kvp.Value;
subTotalTaxTotal += taxValue;
if (taxRate > decimal.Zero && taxValue > decimal.Zero)
{
if (!taxRates.ContainsKey(taxRate))
{
taxRates.Add(taxRate, taxValue);
}
else
{
taxRates[taxRate] = taxRates[taxRate] + taxValue;
}
}
}
taxTotal += subTotalTaxTotal;
//shipping
var shippingTax = decimal.Zero;
if (_taxSettings.ShippingIsTaxable)
{
var(shippingExclTax, _, _) = await _orderTotalCalculationService
.GetShoppingCartShippingTotalAsync(taxTotalRequest.ShoppingCart, false);
var(shippingInclTax, taxRate, _) = await _orderTotalCalculationService
.GetShoppingCartShippingTotalAsync(taxTotalRequest.ShoppingCart, true);
if (shippingExclTax.HasValue && shippingInclTax.HasValue)
{
shippingTax = shippingInclTax.Value - shippingExclTax.Value;
if (shippingTax < decimal.Zero)
{
shippingTax = decimal.Zero;
}
if (taxRate > decimal.Zero && shippingTax > decimal.Zero)
{
if (!taxRates.ContainsKey(taxRate))
{
taxRates.Add(taxRate, shippingTax);
}
else
{
taxRates[taxRate] = taxRates[taxRate] + shippingTax;
}
}
}
}
taxTotal += shippingTax;
//short-circuit to avoid circular reference when calculating payment method additional fee during the checkout process
if (!taxTotalRequest.UsePaymentMethodAdditionalFee)
{
return new TaxTotalResult {
TaxTotal = taxTotal
}
}
;
//payment method additional fee
var paymentMethodAdditionalFeeTax = decimal.Zero;
if (_taxSettings.PaymentMethodAdditionalFeeIsTaxable)
{
var paymentMethodSystemName = taxTotalRequest.Customer != null
? await _genericAttributeService
.GetAttributeAsync <string>(taxTotalRequest.Customer, NopCustomerDefaults.SelectedPaymentMethodAttribute, taxTotalRequest.StoreId)
: string.Empty;
var paymentMethodAdditionalFee = await _paymentService
.GetAdditionalHandlingFeeAsync(taxTotalRequest.ShoppingCart, paymentMethodSystemName);
var(paymentMethodAdditionalFeeExclTax, _) = await _taxService
.GetPaymentMethodAdditionalFeeAsync(paymentMethodAdditionalFee, false, taxTotalRequest.Customer);
var(paymentMethodAdditionalFeeInclTax, taxRate) = await _taxService
.GetPaymentMethodAdditionalFeeAsync(paymentMethodAdditionalFee, true, taxTotalRequest.Customer);
paymentMethodAdditionalFeeTax = paymentMethodAdditionalFeeInclTax - paymentMethodAdditionalFeeExclTax;
if (paymentMethodAdditionalFeeTax < decimal.Zero)
{
paymentMethodAdditionalFeeTax = decimal.Zero;
}
if (taxRate > decimal.Zero && paymentMethodAdditionalFeeTax > decimal.Zero)
{
if (!taxRates.ContainsKey(taxRate))
{
taxRates.Add(taxRate, paymentMethodAdditionalFeeTax);
}
else
{
taxRates[taxRate] = taxRates[taxRate] + paymentMethodAdditionalFeeTax;
}
}
}
taxTotal += paymentMethodAdditionalFeeTax;
//add at least one tax rate (0%)
if (!taxRates.Any())
{
taxRates.Add(decimal.Zero, decimal.Zero);
}
if (taxTotal < decimal.Zero)
{
taxTotal = decimal.Zero;
}
taxTotalResult = new TaxTotalResult {
TaxTotal = taxTotal, TaxRates = taxRates,
};
//store values within the scope of the request to avoid duplicate calculations
_httpContextAccessor.HttpContext.Items.TryAdd("nop.TaxTotal", (taxTotalResult, paymentMethodAdditionalFeeTax));
return(taxTotalResult);
}
/// <summary>
/// Ctor
/// </summary>
/// <param name="taxTotalResult">Tax total result</param>
public TaxTotalCalculatedEvent(TaxTotalResult taxTotalResult)
{
TaxTotalResult = taxTotalResult;
}
