public void Buy(Product item)
{
this.Items.Add(item);
}
public void Remove(Product item)
{
var itemToRemove = this.Items.LastOrDefault(i => i.Name.Equals(item.Name));
if (itemToRemove != null)
{
this.Items.Remove(itemToRemove);
}
}
public void BuyProducts()
{
var importedCD = new Product("imported CD", 10.99m, SalesTaxType.Default, DutyTaxType.Import);
var perfume = new Product("perfume", 19.99m, SalesTaxType.Default, DutyTaxType.Domestic);
var headachePills = new Product("headache pills", 4.65m, SalesTaxType.Medical, DutyTaxType.Domestic);
var importedChocolates = new Product("imported chocolates", 16.45m, SalesTaxType.Food, DutyTaxType.Import);
ShoppingCart shoppingCart = new ShoppingCart();
shoppingCart.Buy(importedCD);
shoppingCart.Buy(perfume);
shoppingCart.Buy(headachePills);
shoppingCart.Buy(importedChocolates);
#region Manually Dependency Injection.
// Builds all calculators.
List<ICalculator> calculators = new List<ICalculator>
{
new DefaultTaxCalculator(),
new FoodTaxCalculator(),
new BookTaxCalculator(),
new MedicalTaxCalculator(),
new DomesticTaxCalculator(),
new ImportTaxCalculator()
};
// Builds ICalculatorResolver instance and injects all calculators.
ICalculatorResolver calculatorResolver = new CalculatorResolver(calculators);
// Builds ITaxService instance and injects ICalculatorResolver.
ITaxService taxService = new TaxService(calculatorResolver);
// Builds Cashier instance and injects ITaxService.
Cashier cashier = new Cashier(taxService);
#endregion
cashier.Checkout(shoppingCart);
}