private LineItem GetLineItem(Domain.PrintItem printItem)
{
var strategy = GetItemStrategy(printItem);
return(new LineItem()
{
Name = printItem.Name,
Amount = strategy.CalculateTotal(printItem),
TaxAmount = strategy.CalculateTax(printItem)
});
}
/// <summary>
/// Decides best calculation strategy for a line item
/// </summary>
/// <param name="printItem"></param>
/// <returns></returns>
private IPrintItemCalculationStrategy GetItemStrategy(Domain.PrintItem printItem)
{
if (printItem.Taxation == TaxationType.Standard)
{
return(new StandardTaxCalulcationStrategy());
}
if (printItem.Taxation == TaxationType.TaxFree)
{
return(new TaxFreeItemCalculationStrategy());
}
throw new Exception("Unknown taxation: " + printItem.Taxation);
}
public override decimal CalculateTax(Domain.PrintItem item)
{
return(Round(item.Cost * TaxAmount));
}
public override decimal CalculateTax(Domain.PrintItem item)
{
return(0.00m);
}
public virtual decimal CalculateTotal(Domain.PrintItem item)
{
return(Round(item.Cost));
}
public abstract decimal CalculateTax(Domain.PrintItem item);