/// <summary>
/// Gets tax rate
/// </summary>
/// <param name="product">Product</param>
/// <param name="taxCategoryId">Tax category identifier</param>
/// <param name="customer">Customer</param>
/// <param name="price">Price (taxable value)</param>
/// <returns>
/// A task that represents the asynchronous operation
/// The task result contains the calculated tax rate. A value indicating whether a request is taxable
/// </returns>
protected virtual async Task <(decimal taxRate, bool isTaxable)> GetTaxRateAsync(Product product, int taxCategoryId,
Customer customer, decimal price)
{
var taxRate = decimal.Zero;
//active tax provider
var store = await _storeContext.GetCurrentStoreAsync();
var activeTaxProvider = await _taxPluginManager.LoadPrimaryPluginAsync(customer, store.Id);
if (activeTaxProvider == null)
{
return(taxRate, true);
}
//tax request
var taxRateRequest = await PrepareTaxRateRequestAsync(product, taxCategoryId, customer, price);
var isTaxable = !await IsTaxExemptAsync(product, taxRateRequest.Customer);
//tax exempt
//make EU VAT exempt validation (the European Union Value Added Tax)
if (isTaxable &&
_taxSettings.EuVatEnabled &&
await IsVatExemptAsync(taxRateRequest.Address, taxRateRequest.Customer))
{
//VAT is not chargeable
isTaxable = false;
}
//get tax rate
var taxRateResult = await activeTaxProvider.GetTaxRateAsync(taxRateRequest);
//tax rate is calculated, now consumers can adjust it
await _eventPublisher.PublishAsync(new TaxRateCalculatedEvent(taxRateResult));
if (taxRateResult.Success)
{
//ensure that tax is equal or greater than zero
if (taxRateResult.TaxRate < decimal.Zero)
{
taxRateResult.TaxRate = decimal.Zero;
}
taxRate = taxRateResult.TaxRate;
}
else if (_taxSettings.LogErrors)
{
foreach (var error in taxRateResult.Errors)
{
await _logger.ErrorAsync($"{activeTaxProvider.PluginDescriptor.FriendlyName} - {error}", null, customer);
}
}
return(taxRate, isTaxable);
}
public async Task CanLoadActiveTaxProvider()
{
var provider = await _taxPluginManager.LoadPrimaryPluginAsync();
provider.Should().NotBeNull();
}
