public virtual async Task <ShoppingCartTotal> GetShoppingCartTotalAsync(
IList <OrganizedShoppingCartItem> cart,
bool includeRewardPoints = true,
bool includePaymentFee = true,
bool includeCreditBalance = true)
{
Guard.NotNull(cart, nameof(cart));
var store = _storeContext.CurrentStore;
var customer = cart.GetCustomer();
var paymentMethodSystemName = customer != null
? customer.GenericAttributes.SelectedPaymentMethod
: string.Empty;
var(_, subTotalWithDiscount, _, _, _) = await GetCartSubTotalAsync(cart, false);
// Subtotal with discount.
var subTotalBase = subTotalWithDiscount;
// Shipping without tax.
var(shoppingCartShipping, _, _) = await GetCartShippingTotalAsync(cart, false);
// Payment method additional fee without tax.
var paymentFeeWithoutTax = decimal.Zero;
if (includePaymentFee && paymentMethodSystemName.HasValue())
{
var paymentFee = await GetShoppingCartPaymentFeeAsync(cart, paymentMethodSystemName);
if (paymentFee != decimal.Zero)
{
var(paymentFeeExclTax, _) = await _taxService.GetPaymentMethodFeeAsync(paymentFee, false, customer : customer);
paymentFeeWithoutTax = paymentFeeExclTax.Amount;
}
}
// Tax.
var(shoppingCartTax, _) = await GetCartTaxTotalAsync(cart, includePaymentFee);
// Order total.
var resultTemp = subTotalBase;
if (shoppingCartShipping.HasValue)
{
resultTemp += shoppingCartShipping.Value;
}
resultTemp = _workingCurrency.RoundIfEnabledFor(resultTemp + paymentFeeWithoutTax + shoppingCartTax);
// Order total discount.
var(discountAmount, appliedDiscount) = await GetDiscountAmountAsync(resultTemp, DiscountType.AssignedToOrderTotal, customer);
// Subtotal with discount.
if (resultTemp < discountAmount)
{
discountAmount = resultTemp;
}
// Reduce subtotal.
resultTemp = _workingCurrency.RoundIfEnabledFor(Math.Max(resultTemp - discountAmount, decimal.Zero));
// Applied gift cards.
var appliedGiftCards = new List <AppliedGiftCard>();
if (!cart.IncludesMatchingItems(x => x.IsRecurring))
{
// TODO: (ms) (core) Gift card usage in OrderCalculationService needs to be tested extensively as the gift card code has been fundamentally changed.
var giftCards = await _giftCardService.GetValidGiftCardsAsync(store.Id, customer);
foreach (var gc in giftCards)
{
if (resultTemp > decimal.Zero)
{
var usableAmount = resultTemp > gc.UsableAmount.Amount ? gc.UsableAmount.Amount : resultTemp;
// Reduce subtotal.
resultTemp -= usableAmount;
appliedGiftCards.Add(new()
{
GiftCard = gc.GiftCard,
UsableAmount = new(usableAmount, _primaryCurrency)
});
}
}
}
// Reward points.
var redeemedRewardPoints = 0;
var redeemedRewardPointsAmount = decimal.Zero;
if (_rewardPointsSettings.Enabled &&
includeRewardPoints &&
resultTemp > decimal.Zero &&
customer != null &&
customer.GenericAttributes.UseRewardPointsDuringCheckout)
{
var rewardPointsBalance = customer.GetRewardPointsBalance();
var rewardPointsBalanceAmount = ConvertRewardPointsToAmountCore(rewardPointsBalance);
if (resultTemp > rewardPointsBalanceAmount)
{
redeemedRewardPointsAmount = rewardPointsBalanceAmount;
redeemedRewardPoints = rewardPointsBalance;
}
else
{
redeemedRewardPointsAmount = resultTemp;
redeemedRewardPoints = ConvertAmountToRewardPoints(redeemedRewardPointsAmount);
}
}
resultTemp = _workingCurrency.RoundIfEnabledFor(Math.Max(resultTemp, decimal.Zero));
// Return null if we have errors:
decimal?orderTotal = shoppingCartShipping.HasValue ? resultTemp : null;
var orderTotalConverted = orderTotal;
var appliedCreditBalance = decimal.Zero;
var toNearestRounding = decimal.Zero;
var toNearestRoundingConverted = decimal.Zero;
if (orderTotal.HasValue)
{
orderTotal = orderTotal.Value - redeemedRewardPointsAmount;
// Credit balance.
if (includeCreditBalance && customer != null && orderTotal > decimal.Zero)
{
var creditBalance = customer.GenericAttributes.UseCreditBalanceDuringCheckout;
if (creditBalance > decimal.Zero)
{
if (creditBalance > orderTotal)
{
// Normalize used amount.
appliedCreditBalance = orderTotal.Value;
customer.GenericAttributes.UseCreditBalanceDuringCheckout = orderTotal.Value;
await _db.SaveChangesAsync();
}
else
{
appliedCreditBalance = creditBalance;
}
}
}
orderTotal = _workingCurrency.RoundIfEnabledFor(orderTotal.Value - appliedCreditBalance);
orderTotalConverted = _currencyService.ConvertToWorkingCurrency(orderTotal.Value).Amount;
// Round order total to nearest (cash rounding).
if (_workingCurrency.RoundOrderTotalEnabled && paymentMethodSystemName.HasValue())
{
var paymentMethod = await _db.PaymentMethods.AsNoTracking().FirstOrDefaultAsync(x => x.PaymentMethodSystemName == paymentMethodSystemName);
if (paymentMethod?.RoundOrderTotalEnabled ?? false)
{
orderTotal = _workingCurrency.RoundToNearest(orderTotal.Value, out toNearestRounding);
orderTotalConverted = _workingCurrency.RoundToNearest(orderTotalConverted.Value, out toNearestRoundingConverted);
}
}
}
var result = new ShoppingCartTotal
{
Total = orderTotal.HasValue ? new(orderTotal.Value, _primaryCurrency) : null,
ToNearestRounding = new(toNearestRounding, _primaryCurrency),
DiscountAmount = new(discountAmount, _primaryCurrency),
AppliedDiscount = appliedDiscount,
RedeemedRewardPoints = redeemedRewardPoints,
RedeemedRewardPointsAmount = new(redeemedRewardPointsAmount, _primaryCurrency),
CreditBalance = new(appliedCreditBalance, _primaryCurrency),
AppliedGiftCards = appliedGiftCards,
ConvertedAmount = new ShoppingCartTotal.ConvertedAmounts
{
Total = orderTotalConverted.HasValue ? new(orderTotalConverted.Value, _workingCurrency) : null,
ToNearestRounding = new(toNearestRoundingConverted, _workingCurrency)
}
};
return(result);
}
