internal void CalculateTax(RequestContext context, List <TaxableItem> taxableItems, SalesTransaction transaction)
{
// Reset cached value for tax code / tax code combination totals.
this.taxCodeAmountRounder = new TaxCodeAmountRounder();
// Calculate tax on order-level miscellaneous charges
foreach (var taxableItem in taxableItems)
{
this.CalculateTax(taxableItem, context, transaction);
}
}
/// <summary>
/// Calculates tax for this code for the line item.
/// Updates the line item by adding a new Tax Item.
/// </summary>
/// <param name="codes">The tax codes collection.</param>
/// <param name="taxCodeAmountRounder">The current, accrued totals for this tax code.</param>
/// <returns>The calculated amount of tax.</returns>
public override decimal CalculateTaxAmount(ReadOnlyCollection <TaxCode> codes, TaxCodeAmountRounder taxCodeAmountRounder)
{
if (codes == null)
{
return(decimal.Zero);
}
decimal taxAmount = decimal.Zero;
this.TaxableEntity.ItemTaxGroupId = this.TaxGroup;
taxAmount = this.TaxIncludedInPrice ? this.CalculateTaxIncluded(codes) : this.CalculateTaxExcluded(codes);
string groupRoundingKey = string.Empty;
if (this.TaxGroupRounding)
{
// tax codes already sorted for this taxable item.
foreach (var code in codes)
{
groupRoundingKey += code.Code + "@:$";
}
}
else if (this.TaxLimitBase == TaxLimitBase.InvoiceWithoutVat)
{
// total tax required for whole invoice by this tax code only.
groupRoundingKey = this.Code;
}
// rounding required for above cases and when tax is not zero (not exempted).
if (taxAmount != decimal.Zero)
{
// Adjust tax code amount.
taxAmount = taxCodeAmountRounder.Round(this.TaxContext, this, groupRoundingKey, taxAmount);
}
// Record amounts on line item
TaxLineIndia taxLine = new TaxLineIndia();
taxLine.Amount = taxAmount;
taxLine.Percentage = this.Value;
taxLine.TaxCode = this.Code;
taxLine.TaxGroup = this.TaxGroup;
taxLine.IsExempt = this.Exempt;
taxLine.IsIncludedInPrice = this.TaxIncludedInPrice;
taxLine.TaxComponent = this.GetTaxComponent();
taxLine.IsTaxOnTax = this.IsTaxOnTax;
foreach (string codeInFormula in this.TaxCodesInFormula)
{
if (!taxLine.TaxCodesInFormula.Contains(codeInFormula))
{
taxLine.TaxCodesInFormula.Add(codeInFormula);
}
}
switch (this.Formula.TaxableBasis)
{
case TaxableBasisIndia.MaxRetailPrice:
taxLine.IsIncludedInPrice = false;
break;
case TaxableBasisIndia.ExclusiveLineAmount:
string[] tokens = this.Formula.ParseExpression();
// Iterate through the formula
if (tokens.Length > 1)
{
GetTaxCodeFormulaIndiaDataRequest dataRequest = new GetTaxCodeFormulaIndiaDataRequest(this.TaxGroup, tokens[1]);
FormulaIndia basisFormula = this.RequestContext.Execute <SingleEntityDataServiceResponse <FormulaIndia> >(dataRequest).Entity;
if (basisFormula != null && basisFormula.TaxableBasis == TaxableBasisIndia.MaxRetailPrice)
{
taxLine.IsIncludedInPrice = false;
}
}
break;
default:
break;
}
taxLine.TaxBasis = this.TaxBasis;
this.TaxableEntity.TaxLines.Add(taxLine);
return(taxAmount);
}
/// <summary>
/// Calculates tax for this code for the line item.
/// Updates the line item by adding a new Tax Item.
/// </summary>
/// <param name="codes">The collection of tax codes.</param>
/// <param name="taxCodeAmountRounder">The current, accrued totals for this tax code.</param>
/// <returns>
/// The calculated amount of tax.
/// </returns>
public virtual decimal CalculateTaxAmount(ReadOnlyCollection <TaxCode> codes, TaxCodeAmountRounder taxCodeAmountRounder)
{
decimal taxAmount = decimal.Zero;
this.TaxableEntity.ItemTaxGroupId = this.TaxGroup;
var taxAmountNonRounded = this.TaxIncludedInPrice ? this.CalculateTaxIncluded(codes) : this.CalculateTaxExcluded(codes);
string groupRoundingKey = string.Empty;
if (this.TaxGroupRounding)
{
// tax codes already sorted for this taxable item.
foreach (var code in codes)
{
groupRoundingKey += code.Code + "@:$";
}
}
else if (this.TaxLimitBase == TaxLimitBase.InvoiceWithoutVat)
{
// total tax required for whole invoice by this tax code only.
groupRoundingKey = this.Code;
}
// rounding required when tax is not zero (not exempted).
if (taxAmountNonRounded != decimal.Zero)
{
// Round per tax code or adjust tax code amount.
taxAmount = taxCodeAmountRounder.Round(this.TaxContext, this, groupRoundingKey, taxAmountNonRounded);
}
// record amounts on line item
TaxLine taxLine = new TaxLine
{
Amount = taxAmount,
Percentage = this.Value,
TaxCode = this.Code,
TaxGroup = this.TaxGroup,
IsExempt = this.Exempt,
IsIncludedInPrice = this.TaxIncludedInPrice,
TaxBasis = this.TaxBasis
};
this.TaxableEntity.TaxLines.Add(taxLine);
return(taxAmount);
}
