GetShoppingCartSubTotal(IList <ShoppingCartItem> cart, bool includingTax)
{
var discountAmount = decimal.Zero;
var appliedDiscounts = new List <ApplyDiscount>();
var subTotalWithoutDiscount = decimal.Zero;
var subTotalWithDiscount = decimal.Zero;
var taxRates = new SortedDictionary <decimal, decimal>();
if (!cart.Any())
{
return(discountAmount, appliedDiscounts, subTotalWithoutDiscount, subTotalWithDiscount, taxRates);
}
//get the customer
Customer customer = _workContext.CurrentCustomer;
//sub totals
decimal subTotalExclTaxWithoutDiscount = decimal.Zero;
decimal subTotalInclTaxWithoutDiscount = decimal.Zero;
foreach (var shoppingCartItem in cart)
{
var product = await _productService.GetProductById(shoppingCartItem.ProductId);
if (product == null)
{
continue;
}
var subtotal = await _pricingService.GetSubTotal(shoppingCartItem, product);
decimal sciSubTotal = subtotal.subTotal;
decimal taxRate;
var pricesExcl = await _taxService.GetProductPrice(product, sciSubTotal, false, customer);
decimal sciExclTax = pricesExcl.productprice;
var pricesIncl = await _taxService.GetProductPrice(product, sciSubTotal, true, customer);
decimal sciInclTax = pricesIncl.productprice;
taxRate = pricesIncl.taxRate;
subTotalExclTaxWithoutDiscount += sciExclTax;
subTotalInclTaxWithoutDiscount += sciInclTax;
//tax rates
decimal sciTax = sciInclTax - sciExclTax;
if (taxRate > decimal.Zero && sciTax > decimal.Zero)
{
if (!taxRates.ContainsKey(taxRate))
{
taxRates.Add(taxRate, sciTax);
}
else
{
taxRates[taxRate] = taxRates[taxRate] + sciTax;
}
}
}
//checkout attributes
if (customer != null)
{
var checkoutAttributes = customer.GetUserFieldFromEntity <List <CustomAttribute> >(SystemCustomerFieldNames.CheckoutAttributes, _workContext.CurrentStore.Id);
var attributeValues = await _checkoutAttributeParser.ParseCheckoutAttributeValue(checkoutAttributes);
foreach (var attributeValue in attributeValues)
{
decimal taxRate;
var checkoutAttributePriceExclTax = await _taxService.GetCheckoutAttributePrice(attributeValue.ca, attributeValue.cav, false, customer);
decimal caExclTax = await _currencyService.ConvertFromPrimaryStoreCurrency(checkoutAttributePriceExclTax.checkoutPrice, _workContext.WorkingCurrency);
var checkoutAttributePriceInclTax = await _taxService.GetCheckoutAttributePrice(attributeValue.ca, attributeValue.cav, true, customer);
decimal caInclTax = await _currencyService.ConvertFromPrimaryStoreCurrency(checkoutAttributePriceInclTax.checkoutPrice, _workContext.WorkingCurrency);
taxRate = checkoutAttributePriceInclTax.taxRate;
subTotalExclTaxWithoutDiscount += caExclTax;
subTotalInclTaxWithoutDiscount += caInclTax;
//tax rates
decimal caTax = caInclTax - caExclTax;
if (taxRate > decimal.Zero && caTax > decimal.Zero)
{
if (!taxRates.ContainsKey(taxRate))
{
taxRates.Add(taxRate, caTax);
}
else
{
taxRates[taxRate] = taxRates[taxRate] + caTax;
}
}
}
}
//subtotal without discount
subTotalWithoutDiscount = includingTax ? subTotalInclTaxWithoutDiscount : subTotalExclTaxWithoutDiscount;
if (subTotalWithoutDiscount < decimal.Zero)
{
subTotalWithoutDiscount = decimal.Zero;
}
if (_shoppingCartSettings.RoundPrices)
{
subTotalWithoutDiscount = RoundingHelper.RoundPrice(subTotalWithoutDiscount, _workContext.WorkingCurrency);
}
//We calculate discount amount on order subtotal excl tax (discount first)
//calculate discount amount ('Applied to order subtotal' discount)
var orderSubtotalDiscount = await GetOrderSubtotalDiscount(customer, _workContext.WorkingCurrency, subTotalExclTaxWithoutDiscount);
decimal discountAmountExclTax = orderSubtotalDiscount.ordersubtotaldiscount;
appliedDiscounts = orderSubtotalDiscount.appliedDiscounts;
if (subTotalExclTaxWithoutDiscount < discountAmountExclTax)
{
discountAmountExclTax = subTotalExclTaxWithoutDiscount;
}
decimal discountAmountInclTax = discountAmountExclTax;
//subtotal with discount (excl tax)
decimal subTotalExclTaxWithDiscount = subTotalExclTaxWithoutDiscount - discountAmountExclTax;
decimal subTotalInclTaxWithDiscount = subTotalExclTaxWithDiscount;
//add tax for shopping items & checkout attributes
var tempTaxRates = new Dictionary <decimal, decimal>(taxRates);
foreach (KeyValuePair <decimal, decimal> kvp in tempTaxRates)
{
decimal taxRate = kvp.Key;
decimal taxValue = kvp.Value;
if (taxValue != decimal.Zero)
{
//discount the tax amount that applies to subtotal items
if (subTotalExclTaxWithoutDiscount > decimal.Zero)
{
decimal discountTax = taxRates[taxRate] * (discountAmountExclTax / subTotalExclTaxWithoutDiscount);
discountAmountInclTax += discountTax;
taxValue = taxRates[taxRate] - discountTax;
if (_shoppingCartSettings.RoundPrices)
{
taxValue = RoundingHelper.RoundPrice(taxValue, _workContext.WorkingCurrency);
}
taxRates[taxRate] = taxValue;
}
//subtotal with discount (incl tax)
subTotalInclTaxWithDiscount += taxValue;
}
}
if (_shoppingCartSettings.RoundPrices)
{
discountAmountInclTax = RoundingHelper.RoundPrice(discountAmountInclTax, _workContext.WorkingCurrency);
discountAmountExclTax = RoundingHelper.RoundPrice(discountAmountExclTax, _workContext.WorkingCurrency);
}
if (includingTax)
{
subTotalWithDiscount = subTotalInclTaxWithDiscount;
discountAmount = discountAmountInclTax;
}
else
{
subTotalWithDiscount = subTotalExclTaxWithDiscount;
discountAmount = discountAmountExclTax;
}
if (subTotalWithDiscount < decimal.Zero)
{
subTotalWithDiscount = decimal.Zero;
}
if (_shoppingCartSettings.RoundPrices)
{
subTotalWithDiscount = RoundingHelper.RoundPrice(subTotalWithDiscount, _workContext.WorkingCurrency);
}
return(discountAmount, appliedDiscounts, subTotalWithoutDiscount, subTotalWithDiscount, taxRates);
}
/// <summary>
/// Add order items to the request query parameters
/// </summary>
/// <param name="parameters">Query parameters</param>
/// <param name="postProcessPaymentRequest">Payment info required for an order processing</param>
private async Task AddItemsParameters(IDictionary <string, string> parameters, PostProcessPaymentRequest postProcessPaymentRequest)
{
//upload order items
parameters.Add("cmd", "_cart");
parameters.Add("upload", "1");
var cartTotal = decimal.Zero;
var roundedCartTotal = decimal.Zero;
var itemCount = 1;
var rate = postProcessPaymentRequest.Order.CurrencyRate;
//add shopping cart items
foreach (var item in postProcessPaymentRequest.Order.OrderItems)
{
var product = await _productService.GetProductById(item.ProductId);
var roundedItemPrice = Math.Round(item.UnitPriceExclTax * rate, 2);
//add query parameters
parameters.Add($"item_name_{itemCount}", product.Name);
parameters.Add($"amount_{itemCount}", roundedItemPrice.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", item.Quantity.ToString());
cartTotal += (item.PriceExclTax * rate);
roundedCartTotal += roundedItemPrice * item.Quantity;
itemCount++;
}
//add checkout attributes as order items
var checkoutAttributeValues = await _checkoutAttributeParser.ParseCheckoutAttributeValue(postProcessPaymentRequest.Order.CheckoutAttributesXml);
var customer = await _serviceProvider.GetRequiredService <ICustomerService>().GetCustomerById(postProcessPaymentRequest.Order.CustomerId);
foreach (var attributeValue in checkoutAttributeValues)
{
var attributePrice = await _taxService.GetCheckoutAttributePrice(attributeValue.ca, attributeValue.cav, false, customer);
if (attributePrice.checkoutPrice > 0)
{
var roundedAttributePrice = Math.Round(attributePrice.checkoutPrice * rate, 2);
//add query parameters
if (attributeValue.ca != null)
{
parameters.Add($"item_name_{itemCount}", attributeValue.ca.Name);
parameters.Add($"amount_{itemCount}", roundedAttributePrice.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", "1");
cartTotal += attributePrice.checkoutPrice;
roundedCartTotal += roundedAttributePrice;
itemCount++;
}
}
}
//add shipping fee as a separate order item, if it has price
var roundedShippingPrice = Math.Round(postProcessPaymentRequest.Order.OrderShippingExclTax * rate, 2);
if (roundedShippingPrice > decimal.Zero)
{
parameters.Add($"item_name_{itemCount}", "Shipping fee");
parameters.Add($"amount_{itemCount}", roundedShippingPrice.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", "1");
cartTotal += (postProcessPaymentRequest.Order.OrderShippingExclTax * rate);
roundedCartTotal += roundedShippingPrice;
itemCount++;
}
//add payment method additional fee as a separate order item, if it has price
var roundedPaymentMethodPrice = Math.Round(postProcessPaymentRequest.Order.PaymentMethodAdditionalFeeExclTax * rate, 2);
if (roundedPaymentMethodPrice > decimal.Zero)
{
parameters.Add($"item_name_{itemCount}", "Payment method fee");
parameters.Add($"amount_{itemCount}", roundedPaymentMethodPrice.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", "1");
cartTotal += (postProcessPaymentRequest.Order.PaymentMethodAdditionalFeeExclTax * rate);
roundedCartTotal += roundedPaymentMethodPrice;
itemCount++;
}
//add tax as a separate order item, if it has positive amount
var roundedTaxAmount = Math.Round(postProcessPaymentRequest.Order.OrderTax * rate, 2);
if (roundedTaxAmount > decimal.Zero)
{
parameters.Add($"item_name_{itemCount}", "Tax amount");
parameters.Add($"amount_{itemCount}", roundedTaxAmount.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", "1");
cartTotal += (postProcessPaymentRequest.Order.OrderTax * rate);
roundedCartTotal += roundedTaxAmount;
itemCount++;
}
if (cartTotal * rate > postProcessPaymentRequest.Order.OrderTotal * rate)
{
//get the difference between what the order total is and what it should be and use that as the "discount"
var discountTotal = Math.Round(cartTotal - (postProcessPaymentRequest.Order.OrderTotal * rate), 2);
roundedCartTotal -= discountTotal;
//gift card or rewarded point amount applied to cart in nopCommerce - shows in PayPal as "discount"
parameters.Add("discount_amount_cart", discountTotal.ToString("0.00", CultureInfo.InvariantCulture));
}
//save order total that actually sent to PayPal (used for PDT order total validation)
await _genericAttributeService.SaveAttribute(postProcessPaymentRequest.Order, PaypalHelper.OrderTotalSentToPayPal, roundedCartTotal);
}
/// <summary>
/// Add order items to the request query parameters
/// </summary>
/// <param name="parameters">Query parameters</param>
/// <param name="postProcessPaymentRequest">Payment info required for an order processing</param>
private async Task AddItemsParameters(IDictionary <string, string> parameters, Order order)
{
//upload order items
parameters.Add("cmd", "_cart");
parameters.Add("upload", "1");
double cartTotal = 0;
double roundedCartTotal = 0;
var itemCount = 1;
//add shopping cart items
foreach (var item in order.OrderItems)
{
var product = await _productService.GetProductById(item.ProductId);
var roundedItemPrice = Math.Round(item.UnitPriceExclTax, 2);
//add query parameters
parameters.Add($"item_name_{itemCount}", product.Name);
parameters.Add($"amount_{itemCount}", roundedItemPrice.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", item.Quantity.ToString());
cartTotal += (item.PriceExclTax);
roundedCartTotal += roundedItemPrice * item.Quantity;
itemCount++;
}
//add checkout attributes as order items
var checkoutAttributeValues = await _checkoutAttributeParser.ParseCheckoutAttributeValue(order.CheckoutAttributes);
var currencyService = _serviceProvider.GetRequiredService <ICurrencyService>();
var workContext = _serviceProvider.GetRequiredService <IWorkContext>();
var customer = await _serviceProvider.GetRequiredService <ICustomerService>().GetCustomerById(order.CustomerId);
foreach (var attributeValue in checkoutAttributeValues)
{
var attributePrice = await _taxService.GetCheckoutAttributePrice(attributeValue.ca, attributeValue.cav, false, customer);
if (attributePrice.checkoutPrice > 0)
{
double roundedAttributePrice = Math.Round(await currencyService.ConvertFromPrimaryStoreCurrency(attributePrice.checkoutPrice, workContext.WorkingCurrency), 2);
//add query parameters
if (attributeValue.ca != null)
{
parameters.Add($"item_name_{itemCount}", attributeValue.ca.Name);
parameters.Add($"amount_{itemCount}", roundedAttributePrice.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", "1");
cartTotal += attributePrice.checkoutPrice;
roundedCartTotal += roundedAttributePrice;
itemCount++;
}
}
}
//add shipping fee as a separate order item, if it has price
var roundedShippingPrice = Math.Round(order.OrderShippingExclTax, 2);
if (roundedShippingPrice > 0)
{
parameters.Add($"item_name_{itemCount}", "Shipping fee");
parameters.Add($"amount_{itemCount}", roundedShippingPrice.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", "1");
cartTotal += (order.OrderShippingExclTax);
roundedCartTotal += roundedShippingPrice;
itemCount++;
}
//add payment method additional fee as a separate order item, if it has price
var roundedPaymentMethodPrice = Math.Round(order.PaymentMethodAdditionalFeeExclTax, 2);
if (roundedPaymentMethodPrice > 0)
{
parameters.Add($"item_name_{itemCount}", "Payment method fee");
parameters.Add($"amount_{itemCount}", roundedPaymentMethodPrice.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", "1");
cartTotal += (order.PaymentMethodAdditionalFeeExclTax);
roundedCartTotal += roundedPaymentMethodPrice;
itemCount++;
}
//add tax as a separate order item, if it has positive amount
var roundedTaxAmount = Math.Round(order.OrderTax, 2);
if (roundedTaxAmount > 0)
{
parameters.Add($"item_name_{itemCount}", "Tax amount");
parameters.Add($"amount_{itemCount}", roundedTaxAmount.ToString("0.00", CultureInfo.InvariantCulture));
parameters.Add($"quantity_{itemCount}", "1");
cartTotal += (order.OrderTax);
roundedCartTotal += roundedTaxAmount;
itemCount++;
}
if (cartTotal > order.OrderTotal)
{
//get the difference between what the order total is and what it should be and use that as the "discount"
var discountTotal = Math.Round(cartTotal - (order.OrderTotal), 2);
roundedCartTotal -= discountTotal;
//gift voucher or loyalty points amount applied to cart in nopCommerce - shows in PayPal as "discount"
parameters.Add("discount_amount_cart", discountTotal.ToString("0.00", CultureInfo.InvariantCulture));
}
//save order total that actually sent to PayPal (used for PDT order total validation)
await _userFieldService.SaveField(order, PaypalHelper.OrderTotalSentToPayPal, roundedCartTotal);
}