bool IsCategoryOfferVoucherValid(CategoryOfferVoucher voucher)
{
bool isValid = false;
if (IsVoucherThresholdMet(voucher))
{
List <Product> qualifyingProducts = BasketItems.Where(w => w.Category == voucher.ProductCategory).ToList();
if (qualifyingProducts.Count > 0)
{
decimal qualifyingProductsTotalPrice = 0;
decimal adjustedProductDiscount = 0;
foreach (Product product in qualifyingProducts)
{
qualifyingProductsTotalPrice = qualifyingProductsTotalPrice + product.Price;
}
if (voucher.Discount > qualifyingProductsTotalPrice)
{
adjustedProductDiscount = adjustedProductDiscount + qualifyingProductsTotalPrice;
}
isValid = true;
_discountTotal = _discountTotal + adjustedProductDiscount;
}
else
{
_errorMessage = $"There are no products in your basket applicable to voucher {voucher.VoucherCode}.";
}
}
return(isValid);
}
bool IsVoucherValid(GiftVoucher voucher)
{
bool isVoucherValid = false;
if (voucher.GetType() == typeof(GiftVoucher))
{
isVoucherValid = true;
_discountTotal = _discountTotal + voucher.Discount;
}
else if (!IsOfferVoucherAlreadyApplied)
{
if (voucher.GetType() == typeof(OfferVoucher))
{
OfferVoucher offerVoucher = (OfferVoucher)voucher;
isVoucherValid = IsOfferVoucherValid(offerVoucher);
}
else if (voucher.GetType() == typeof(CategoryOfferVoucher))
{
CategoryOfferVoucher offerVoucher = (CategoryOfferVoucher)voucher;
isVoucherValid = IsCategoryOfferVoucherValid(offerVoucher);
}
}
else
{
_errorMessage = "You can only use one offer voucher at a time.";
}
return(isVoucherValid);
}
