public double Calculate(DiscountCalculationModel model)
{
// Discount applied only on first purchase by the customer
var isFirstPurchase = !_db.Purchases.Any(p => p.CustomerId == model.CustomerId);
return(isFirstPurchase ? model.Sum * 0.7 : model.Sum);
}
public double Calculate(DiscountCalculationModel model)
{
// Discount applied if the overall value of previous purchases exceeds
var customerPurchases = _db.Purchases.Where(p => p.CustomerId == model.CustomerId).ToList();
double customerProvidedValue = 0;
foreach (var purchase in customerPurchases)
{
customerProvidedValue += purchase.Units * purchase.Product.Price;
}
return(customerProvidedValue > 800 ? model.Sum * 0.9 : model.Sum);
}
public ActionResult Index(CalculatorViewModel model)
{
if (ModelState.IsValid)
{
var pickedDiscount = model.DiscountTypes.FirstOrDefault(d => d.Id == model.PickedDiscountTypeId);
var discountCalculationModel = new DiscountCalculationModel();
Mapper.Map(model, discountCalculationModel);
// The calculcator factory gets the necessary Calculator service implementation based on the provided discount type name
model.DiscountedSum = _calculatorFactory.Get(pickedDiscount.Name).Calculate(discountCalculationModel);
ModelState.Clear();
}
return(View(model));
}
public double Calculate(DiscountCalculationModel model)
{
// Discount applied only when the unit count exceeds 1000
return(model.Units > 1000 ? model.Sum * 0.8 : model.Sum);
}
