public PercentageTaxPolicy(decimal rate,
Func <OrderedProduct, decimal> taxableAmountPolicy,
Func <Order, IEnumerable <OrderedProduct> > taxibleItemsPolicy,
ITaxPolicy previousPolicy = null)
: base(previousPolicy)
{
_rate = rate;
_taxableAmountPolicy = taxableAmountPolicy;
_taxableItemsPolicy = taxibleItemsPolicy;
}
public PercentageTaxPolicy( decimal rate,
Func<OrderedProduct, decimal> taxableAmountPolicy,
Func<Order, IEnumerable<OrderedProduct>> taxibleItemsPolicy,
ITaxPolicy previousPolicy = null)
: base(previousPolicy)
{
_rate = rate;
_taxableAmountPolicy = taxableAmountPolicy;
_taxableItemsPolicy = taxibleItemsPolicy;
}
public void Handle()
{
int orderId = 1234;
Order order = _orderRepository.Get(orderId);
TaxPolicyFactory policyFactory = new TaxPolicyFactory();
ITaxPolicy taxPolicy = policyFactory.CreateTaxPolicy(order.Customer);
Invoice invoice = _invoiceService.CreateInvoice(order, taxPolicy);
//TODO: Save repository into the store
}
//Prefer to have factory here. Followed by DDD rules about domain service definition.
//Should be used when one aggregate is being transformed to another one.
public Invoice CreateInvoice(Order order, ITaxPolicy taxPolicy)
{
Invoice invoice = new Invoice(order.Customer);
foreach (var orderLine in order.OrderLines)
{
Tax tax = taxPolicy.CalculateTax(orderLine.Product, orderLine.TotalEffectivePrice);
InvoiceLine line = new InvoiceLine(orderLine.Product, orderLine.Quantity, orderLine.TotalEffectivePrice, tax);
invoice.AddLine(line);
}
return(invoice);
}
public Invoice Issuance(Order order, ITaxPolicy taxPolicy)
{
// TODO refactor to InvoiceFactory, testability
Invoice invoice = new Invoice(order.ClientId);
foreach (OrderedProduct orderedProduct in order.OrderedProducts)
{
Product product = ProductRepository.Load(orderedProduct.ProductId);
Money net = orderedProduct.EffectiveCost;
Tax tax = taxPolicy.CalculateTax(product.Type, net);
InvoiceLine invoiceLine = new InvoiceLine(product, orderedProduct.Quantity, net, tax);
invoice.AddItem(invoiceLine);
}
return(invoice);
}
public void ApplyTaxPolicy(ITaxPolicy taxPolicy)
{
taxPolicy.ApplyTaxes(this);
}
public MillitaryTaxPolicy(ITaxPolicy previousPolicy = null)
: base(previousPolicy)
{
}
internal TaxPolicy(ITaxPolicy previousPolicy)
{
_previousPolicy = previousPolicy;
}
public MillitaryTaxPolicy(ITaxPolicy previousPolicy = null)
: base(previousPolicy)
{
}
internal TaxPolicy(ITaxPolicy previousPolicy)
{
_previousPolicy = previousPolicy;
}
public static Order In(this Order order, ITaxPolicy taxPolicy)
{
order.ApplyTaxPolicy(taxPolicy);
return order;
}
public FlatTaxPolicy(decimal fixedTax, ITaxPolicy previousPolicy = null)
: base(previousPolicy)
{
_fixedTax = fixedTax;
}
public void ApplyTaxPolicy(ITaxPolicy taxPolicy)
{
taxPolicy.ApplyTaxes(this);
}
public FlatTaxPolicy(decimal fixedTax, ITaxPolicy previousPolicy = null)
: base(previousPolicy)
{
_fixedTax = fixedTax;
}
public static Order In(this Order order, ITaxPolicy taxPolicy)
{
order.ApplyTaxPolicy(taxPolicy);
return(order);
}
