void ITaxRate.TaxItem(ITaxable item, IAddress address)
{
if (AppliesToItem(item, address))
{
if (this.ApplyToShipping)
{
item.IncrementTaxValue((item.TaxableValue() + item.TaxableShippingValue()) * (this.Rate / 100M));
}
else
{
item.IncrementTaxValue(item.TaxableValue() * (this.Rate / 100M));
}
}
}
void ITaxRate.TaxItem(ITaxable item, IAddress address)
{
if (AppliesToItem(item, address))
{
if (this.ApplyToShipping)
{
item.IncrementTaxValue((item.TaxableValue() + item.TaxableShippingValue()) * (this.Rate / 100M));
}
else
{
item.IncrementTaxValue(item.TaxableValue() * (this.Rate / 100M));
}
}
}
private void TaxItems(ITaxSchedule schedule, List <ITaxable> items, IAddress address)
{
if (schedule == null)
{
return;
}
if (items == null)
{
return;
}
if (address == null)
{
return;
}
// Holds all taxes for the schedule summarized
TaxableItem summaryForSchedule = new TaxableItem();
summaryForSchedule.ScheduleId = schedule.TaxScheduleId();
// Find all items that match the schedule
List <ITaxable> itemsMatchingSchedule = new List <ITaxable>();
foreach (ITaxable item in items)
{
if (item.TaxScheduleId() == schedule.TaxScheduleId())
{
summaryForSchedule.Value += item.TaxableValue();
summaryForSchedule.ShippingValue += item.TaxableShippingValue();
itemsMatchingSchedule.Add(item);
}
}
// Now Apply all taxes in schedule to total price of all items
foreach (ITaxRate rate in _app.OrderServices.Taxes.GetRates(_app.CurrentStore.Id, schedule.TaxScheduleId()))
{
rate.TaxItem(summaryForSchedule, address);
}
// Total Tax for all items on this schedule is calculated
// Now, we assign the tax parts to each line item based on their
// linetotal value. The last item should get the remainder of the tax
decimal RoundedTotal = Math.Round(summaryForSchedule.TaxedValue, 2);
decimal TotalApplied = 0M;
for (int i = 0; i < itemsMatchingSchedule.Count(); i++)
{
ITaxable item = itemsMatchingSchedule[i];
item.ClearTaxValue();
if (i == itemsMatchingSchedule.Count() - 1)
{
// last item
item.IncrementTaxValue(RoundedTotal - TotalApplied);
}
else
{
decimal percentOfTotal = 0;
if (summaryForSchedule.TaxableValue() != 0)
{
percentOfTotal = item.TaxableValue() / summaryForSchedule.TaxableValue();
}
decimal part = Math.Round(percentOfTotal * summaryForSchedule.TaxedValue, 2);
item.IncrementTaxValue(part);
TotalApplied += part;
}
}
}