#1088: Bug with special product price when ordering (#1089)

Author: s04v

src/Modules/SimplCommerce.Module.Checkouts/Areas/Checkouts/ViewModels/CheckoutItemVm.cs

@@ -26,6 +26,8 @@ public CheckoutItemVm(ICurrencyService currencyService)
 
         public string ProductImage { get; set; }
 
+        public CalculatedProductPrice CalculatedProductPrice { get; set; }
+
         public decimal ProductPrice { get; set; }
 
         public string ProductPriceString => _currencyService.FormatCurrency(ProductPrice);

src/Modules/SimplCommerce.Module.Checkouts/Services/CheckoutService.cs

@@ -5,6 +5,7 @@
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using SimplCommerce.Infrastructure.Data;
+using SimplCommerce.Module.Catalog.Services;
 using SimplCommerce.Module.Checkouts.Areas.Checkouts.ViewModels;
 using SimplCommerce.Module.Checkouts.Models;
 using SimplCommerce.Module.Core.Models;
@@ -26,6 +27,7 @@ public class CheckoutService : ICheckoutService
         private readonly IMediaService _mediaService;
         private readonly ICouponService _couponService;
         private readonly bool _isProductPriceIncludeTax;
+        private readonly IProductPricingService _productPriceService;
 
         public CheckoutService(
             IRepositoryWithTypedId<Checkout, Guid> checkoutRepository,
@@ -36,7 +38,8 @@ public CheckoutService(
             ICurrencyService currencyService,
             IMediaService mediaService,
             ICouponService couponService,
-            IConfiguration config)
+            IConfiguration config,
+            IProductPricingService productPriceService)
         {
             _checkoutRepository = checkoutRepository;
             _userAddressRepository = userAddressRepository;
@@ -47,6 +50,7 @@ public CheckoutService(
             _mediaService = mediaService;
             _couponService = couponService;
             _isProductPriceIncludeTax = config.GetValue<bool>("Catalog.IsProductPriceIncludeTax");
+            _productPriceService = productPriceService;
         }
 
         public async Task<Checkout> Create(long customerId, long createdById, IList<CartItemToCheckoutVm> cartItems, string couponCode)
@@ -182,6 +186,7 @@ public async Task<CheckoutVm> GetCheckoutDetails(Guid checkoutId)
                     Id = x.Id,
                     ProductId = x.ProductId,
                     ProductName = x.Product.Name,
+                    CalculatedProductPrice = _productPriceService.CalculateProductPrice(x.Product),
                     ProductPrice = x.Product.Price,
                     ProductStockQuantity = x.Product.StockQuantity,
                     ProductStockTrackingIsEnabled = x.Product.StockTrackingIsEnabled,
@@ -191,7 +196,7 @@ public async Task<CheckoutVm> GetCheckoutDetails(Guid checkoutId)
                     VariationOptions = CheckoutItemVm.GetVariationOption(x.Product)
                 }).ToList();
 
-            checkoutVm.SubTotal = checkoutVm.Items.Sum(x => x.Quantity * x.ProductPrice);
+            checkoutVm.SubTotal = checkoutVm.Items.Sum(x => x.Quantity * (x.CalculatedProductPrice.OldPrice ?? x.ProductPrice));
             if (!string.IsNullOrWhiteSpace(checkoutVm.CouponCode))
             {
                 var cartInfoForCoupon = new CartInfoForCoupon
@@ -209,6 +214,10 @@ public async Task<CheckoutVm> GetCheckoutDetails(Guid checkoutId)
                 }
             }
 
+            checkoutVm.Discount += checkoutVm.Items
+                .Where(x => x.CalculatedProductPrice.OldPrice.HasValue)
+                .Sum(x => x.Quantity * (x.CalculatedProductPrice.OldPrice.Value - x.CalculatedProductPrice.Price)); 
+
             return checkoutVm;
         }
     }

src/Modules/SimplCommerce.Module.Orders/Areas/Orders/Views/Shared/Components/OrderSummary/Default.cshtml

@@ -23,7 +23,16 @@
                 }
             </td>
             <td class="text-center">@item.Quantity</td>
-            <td class="text-right">@item.ProductPriceString</td>
+            <td class="text-right">
+                @if(item.CalculatedProductPrice.OldPrice.HasValue)
+                {
+                    <text>@item.CalculatedProductPrice.OldPriceString</text>
+                }
+                else
+                {
+                    <text>@item.CalculatedProductPrice.PriceString</text>
+                }
+            </td>
         </tr>
     }
     <tr>

src/Modules/SimplCommerce.Module.Orders/Services/OrderService.cs

@@ -18,6 +18,7 @@
 using SimplCommerce.Module.Checkouts.Services;
 using SimplCommerce.Module.Checkouts.Models;
 using SimplCommerce.Module.Checkouts.Areas.Checkouts.ViewModels;
+using SimplCommerce.Module.Catalog.Services;
 
 namespace SimplCommerce.Module.Orders.Services
 {
@@ -33,6 +34,7 @@ public class OrderService : IOrderService
         private readonly IShippingPriceService _shippingPriceService;
         private readonly IRepository<UserAddress> _userAddressRepository;
         private readonly IMediator _mediator;
+        private readonly IProductPricingService _productPricingService;
 
         public OrderService(IRepository<Order> orderRepository,
             ICouponService couponService,
@@ -43,7 +45,8 @@ public OrderService(IRepository<Order> orderRepository,
             IRepositoryWithTypedId<Checkout, Guid> checkoutRepository,
             IShippingPriceService shippingPriceService,
             IRepository<UserAddress> userAddressRepository,
-            IMediator mediator)
+            IMediator mediator,
+            IProductPricingService productPricingService)
         {
             _orderRepository = orderRepository;
             _couponService = couponService;
@@ -55,6 +58,7 @@ public OrderService(IRepository<Order> orderRepository,
             _shippingPriceService = shippingPriceService;
             _userAddressRepository = userAddressRepository;
             _mediator = mediator;
+            _productPricingService = productPricingService;
         }
 
         public async Task<Result<Order>> CreateOrder(Guid checkoutId, string paymentMethod, decimal paymentFeeAmount, OrderStatus orderStatus = OrderStatus.New)
@@ -220,7 +224,10 @@ public async Task<Result<Order>> CreateOrder(Guid checkoutId, string paymentMeth
                 }
 
                 var taxPercent = await _taxService.GetTaxPercent(checkoutItem.Product.TaxClassId, shippingAddress.CountryId, shippingAddress.StateOrProvinceId, shippingAddress.ZipCode);
-                var productPrice = checkoutItem.Product.Price;
+                
+                var calculatedProductPrice = _productPricingService.CalculateProductPrice(checkoutItem.Product);
+
+                var productPrice = calculatedProductPrice.OldPrice ?? calculatedProductPrice.Price;
                 if (checkout.IsProductPriceIncludeTax)
                 {
                     productPrice = productPrice / (1 + (taxPercent / 100));
@@ -241,6 +248,11 @@ public async Task<Result<Order>> CreateOrder(Guid checkoutId, string paymentMeth
                     orderItem.DiscountAmount = discountedItem.DiscountAmount;
                 }
 
+                if (calculatedProductPrice.OldPrice.HasValue)
+                {
+                    orderItem.DiscountAmount += orderItem.Quantity * (calculatedProductPrice.OldPrice.Value - calculatedProductPrice.Price);
+                }
+
                 order.AddOrderItem(orderItem);
                 if (checkoutItem.Product.StockTrackingIsEnabled)
                 {
@@ -252,7 +264,7 @@ public async Task<Result<Order>> CreateOrder(Guid checkoutId, string paymentMeth
             order.OrderNote = checkout.OrderNote;
             order.CouponCode = checkingDiscountResult.CouponCode;
             order.CouponRuleName = checkout.CouponRuleName;
-            order.DiscountAmount = checkingDiscountResult.DiscountAmount;
+            order.DiscountAmount = checkingDiscountResult.DiscountAmount + order.OrderItems.Sum(x => x.DiscountAmount);
             order.ShippingFeeAmount = shippingMethod.Price;
             order.ShippingMethod = shippingMethod.Name;
             order.TaxAmount = order.OrderItems.Sum(x => x.TaxAmount);

src/Modules/SimplCommerce.Module.ShoppingCart/Areas/ShoppingCart/Controllers/CartController.cs

@@ -72,6 +72,7 @@ public async Task<IActionResult> AddToCartResult(long productId)
             model.ProductName = addedProduct.ProductName;
             model.ProductImage = addedProduct.ProductImage;
             model.ProductPrice = addedProduct.ProductPrice;
+            model.CalculatedProductPrice = addedProduct.CalculatedProductPrice;
             model.Quantity = addedProduct.Quantity;
 
             return PartialView(model);

src/Modules/SimplCommerce.Module.ShoppingCart/Areas/ShoppingCart/ViewModels/AddToCartResultVm.cs

@@ -1,4 +1,5 @@
-using SimplCommerce.Module.Core.Services;
+using SimplCommerce.Module.Catalog.Models;
+using SimplCommerce.Module.Core.Services;
 
 namespace SimplCommerce.Module.ShoppingCart.Areas.ShoppingCart.ViewModels
 {
@@ -15,6 +16,8 @@ public AddToCartResultVm(ICurrencyService currencyService)
 
         public string ProductImage { get; set; }
 
+        public CalculatedProductPrice CalculatedProductPrice { get; set; }
+
         public decimal ProductPrice { get; set; }
 
         public string VariationName { get; set; }

src/Modules/SimplCommerce.Module.ShoppingCart/Areas/ShoppingCart/ViewModels/CartItemVm.cs

@@ -22,6 +22,8 @@ public CartItemVm(ICurrencyService currencyService)
 
         public string ProductImage { get; set; }
 
+        public CalculatedProductPrice CalculatedProductPrice { get; set; }
+
         public decimal ProductPrice { get; set; }
 
         public string ProductPriceString => _currencyService.FormatCurrency(ProductPrice);

src/Modules/SimplCommerce.Module.ShoppingCart/Areas/ShoppingCart/Views/Cart/AddToCartResult.cshtml

@@ -14,7 +14,7 @@
             <h6>@Model.VariationName</h6>
         </div>
         <div class="col-md-3">
-            @Model.Quantity x @Model.ProductPriceString
+            @Model.Quantity x @Model.CalculatedProductPrice.PriceString
         </div>
     </div>
     <div class="row">

src/Modules/SimplCommerce.Module.ShoppingCart/Areas/ShoppingCart/Views/Cart/Index.cshtml

@@ -26,7 +26,11 @@
                         <span ng-if="!cartItem.isProductAvailabeToOrder" class="badge badge-pill badge-danger">@Localizer["Not availabe any more"]</span>
                         <span ng-if="cartItem.productStockTrackingIsEnabled && cartItem.productStockQuantity < cartItem.quantity" class="badge badge-pill badge-danger">@Localizer["Not enough stock. Available:"] {{cartItem.productStockQuantity}}</span>
                     </td>
-                    <td class="text-right">{{cartItem.productPriceString}}</td>
+                    <td class="text-right">
+                        {{cartItem.calculatedProductPrice.priceString}} 
+                        <br />
+                        <del ng-if="cartItem.calculatedProductPrice.oldPrice > cartItem.calculatedProductPrice.price">{{cartItem.calculatedProductPrice.oldPriceString}}</del>
+                    </td>
                     <td class="text-center">
                         <button type="button" class="quantity-button" ng-click="vm.decreaseQuantity(cartItem)" name="subtract" value="-">-</button>
                         <input type="text" class="quantity-field" ng-model="cartItem.quantity" readonly="readonly" />

src/Modules/SimplCommerce.Module.ShoppingCart/Services/CartService.cs

@@ -10,6 +10,7 @@
 using SimplCommerce.Module.Pricing.Services;
 using SimplCommerce.Module.ShoppingCart.Areas.ShoppingCart.ViewModels;
 using Microsoft.Extensions.Localization;
+using SimplCommerce.Module.Catalog.Services;
 
 namespace SimplCommerce.Module.ShoppingCart.Services
 {
@@ -21,16 +22,18 @@ public class CartService : ICartService
         private readonly bool _isProductPriceIncludeTax;
         private readonly ICurrencyService _currencyService;
         private readonly IStringLocalizer _localizer;
+        private readonly IProductPricingService _productPricingService;
 
         public CartService(IRepository<CartItem> cartItemRepository, ICouponService couponService,
-            IMediaService mediaService, IConfiguration config, ICurrencyService currencyService, IStringLocalizerFactory stringLocalizerFactory)
+            IMediaService mediaService, IConfiguration config, ICurrencyService currencyService, IStringLocalizerFactory stringLocalizerFactory, IProductPricingService productPricingService)
         {
             _cartItemRepository = cartItemRepository;
             _couponService = couponService;
             _mediaService = mediaService;
             _currencyService = currencyService;
             _isProductPriceIncludeTax = config.GetValue<bool>("Catalog.IsProductPriceIncludeTax");
             _localizer = stringLocalizerFactory.Create(null);
+            _productPricingService = productPricingService;
         }
 
         public async Task<AddToCartResult> AddToCart(long customerId, long productId, int quantity)
@@ -91,6 +94,7 @@ public async Task<CartVm> GetCartDetails(long customerId)
                     ProductId = x.ProductId,
                     ProductName = x.Product.Name,
                     ProductPrice = x.Product.Price,
+                    CalculatedProductPrice = _productPricingService.CalculateProductPrice(x.Product),
                     ProductStockQuantity = x.Product.StockQuantity,
                     ProductStockTrackingIsEnabled = x.Product.StockTrackingIsEnabled,
                     IsProductAvailabeToOrder = x.Product.IsAllowToOrder && x.Product.IsPublished && !x.Product.IsDeleted,
@@ -99,7 +103,7 @@ public async Task<CartVm> GetCartDetails(long customerId)
                     VariationOptions = CartItemVm.GetVariationOption(x.Product)
                 }).ToList();
 
-            cartVm.SubTotal = cartVm.Items.Sum(x => x.Quantity * x.ProductPrice);
+            cartVm.SubTotal = cartVm.Items.Sum(x => x.Quantity * (x.CalculatedProductPrice.OldPrice ?? x.ProductPrice));
             if (!string.IsNullOrWhiteSpace(cartVm.CouponCode))
             {
                 var cartInfoForCoupon = new CartInfoForCoupon
@@ -117,6 +121,10 @@ public async Task<CartVm> GetCartDetails(long customerId)
                 }
             }
 
+            cartVm.Discount += cartVm.Items
+                .Where(x => x.CalculatedProductPrice.OldPrice.HasValue)
+                .Sum(x => x.Quantity * (x.CalculatedProductPrice.OldPrice.Value - x.CalculatedProductPrice.Price));
+
             return cartVm;
         }