VCST-2303: add changeCartCurrency mutation

src/VirtoCommerce.XCart.Core/CartAggregate.cs

@@ -205,47 +205,56 @@ public virtual async Task<CartAggregate> AddConfiguredItemAsync(NewCartItem newC
 
         public virtual async Task<CartAggregate> AddItemAsync(NewCartItem newCartItem)
         {
-            EnsureCartExists();
-
             ArgumentNullException.ThrowIfNull(newCartItem);
 
+            EnsureCartExists();
+
             var validationResult = await AbstractTypeFactory<NewCartItemValidator>.TryCreateInstance().ValidateAsync(newCartItem, options => options.IncludeRuleSets(ValidationRuleSet));
             if (!validationResult.IsValid)
             {
                 OperationValidationErrors.AddRange(validationResult.Errors);
-            }
-            else if (newCartItem.CartProduct != null)
-            {
-                if (newCartItem.IsWishlist && newCartItem.CartProduct.Price == null)
+
+                if (!newCartItem.IgnoreValidationErrors)
                 {
-                    newCartItem.CartProduct.Price = new ProductPrice(Currency);
+                    return this;
                 }
+            }
 
-                var lineItem = _mapper.Map<LineItem>(newCartItem.CartProduct);
+            if (newCartItem.CartProduct == null)
+            {
+                return this;
+            }
 
-                lineItem.SelectedForCheckout = IsSelectedForCheckout;
-                lineItem.Quantity = newCartItem.Quantity;
+            if (newCartItem.IsWishlist && newCartItem.CartProduct.Price == null)
+            {
+                newCartItem.CartProduct.Price = new ProductPrice(Currency);
+            }
 
-                if (newCartItem.Price != null)
-                {
-                    lineItem.ListPrice = newCartItem.Price.Value;
-                    lineItem.SalePrice = newCartItem.Price.Value;
-                }
-                else
-                {
-                    SetLineItemTierPrice(newCartItem.CartProduct.Price, newCartItem.Quantity, lineItem);
-                }
+            var lineItem = _mapper.Map<LineItem>(newCartItem.CartProduct);
 
-                if (!string.IsNullOrEmpty(newCartItem.Comment))
-                {
-                    lineItem.Note = newCartItem.Comment;
-                }
+            lineItem.Currency ??= Currency.Code;
+            lineItem.SelectedForCheckout = newCartItem.IsSelectedForCheckout ?? IsSelectedForCheckout;
+            lineItem.Quantity = newCartItem.Quantity;
 
-                CartProducts[newCartItem.CartProduct.Id] = newCartItem.CartProduct;
-                await SetItemFulfillmentCenterAsync(lineItem, newCartItem.CartProduct);
-                await UpdateVendor(lineItem, newCartItem.CartProduct);
-                await InnerAddLineItemAsync(lineItem, newCartItem.CartProduct, newCartItem.DynamicProperties);
+            if (newCartItem.Price != null)
+            {
+                lineItem.ListPrice = newCartItem.Price.Value;
+                lineItem.SalePrice = newCartItem.Price.Value;
             }
+            else
+            {
+                SetLineItemTierPrice(newCartItem.CartProduct.Price, newCartItem.Quantity, lineItem);
+            }
+
+            if (!string.IsNullOrEmpty(newCartItem.Comment))
+            {
+                lineItem.Note = newCartItem.Comment;
+            }
+
+            CartProducts[newCartItem.CartProduct.Id] = newCartItem.CartProduct;
+            await SetItemFulfillmentCenterAsync(lineItem, newCartItem.CartProduct);
+            await UpdateVendor(lineItem, newCartItem.CartProduct);
+            await InnerAddLineItemAsync(lineItem, newCartItem.CartProduct, newCartItem.DynamicProperties);
 
             return this;
         }
@@ -270,7 +279,9 @@ await AddItemAsync(new NewCartItem(item.ProductId, item.Quantity)
                         DynamicProperties = item.DynamicProperties,
                         Price = item.Price,
                         IsWishlist = item.IsWishlist,
+                        IsSelectedForCheckout = item.IsSelectedForCheckout,
                         CartProduct = product,
+                        IgnoreValidationErrors = item.IgnoreValidationErrors,
                     });
                 }
                 else

src/VirtoCommerce.XCart.Core/Commands/ChangeCartCurrencyCommand.cs

@@ -0,0 +1,9 @@
+using VirtoCommerce.XCart.Core.Commands.BaseCommands;
+
+namespace VirtoCommerce.XCart.Core.Commands
+{
+    public class ChangeCartCurrencyCommand : CartCommand
+    {
+        public string NewCurrencyCode { get; set; }
+    }
+}

src/VirtoCommerce.XCart.Core/Models/NewCartItem.cs

@@ -33,5 +33,9 @@ public NewCartItem(string productId, int quantity)
         public IList<DynamicPropertyValue> DynamicProperties { get; set; }
 
         public bool IsWishlist { get; set; }
+
+        public bool? IsSelectedForCheckout { get; set; }
+
+        public bool IgnoreValidationErrors { get; set; }
     }
 }

src/VirtoCommerce.XCart.Core/Schemas/InputChangeCartCurrencyType.cs

@@ -0,0 +1,12 @@
+using GraphQL.Types;
+
+namespace VirtoCommerce.XCart.Core.Schemas
+{
+    public class InputChangeCartCurrencyType : InputCartBaseType
+    {
+        public InputChangeCartCurrencyType()
+        {
+            Field<NonNullGraphType<StringGraphType>>("newCurrencyCode", "Second cart currency");
+        }
+    }
+}

src/VirtoCommerce.XCart.Data/Commands/ChangeCartCurrencyCommandHandler.cs

@@ -0,0 +1,62 @@
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using VirtoCommerce.Xapi.Core.Models;
+using VirtoCommerce.XCart.Core;
+using VirtoCommerce.XCart.Core.Commands;
+using VirtoCommerce.XCart.Core.Commands.BaseCommands;
+using VirtoCommerce.XCart.Core.Models;
+using VirtoCommerce.XCart.Core.Services;
+
+namespace VirtoCommerce.XCart.Data.Commands
+{
+    public class ChangeCartCurrencyCommandHandler : CartCommandHandler<ChangeCartCurrencyCommand>
+    {
+        public ChangeCartCurrencyCommandHandler(ICartAggregateRepository cartAggregateRepository)
+            : base(cartAggregateRepository)
+        {
+        }
+
+        public override async Task<CartAggregate> Handle(ChangeCartCurrencyCommand request, CancellationToken cancellationToken)
+        {
+            // get (or create) both carts
+            var currentCurrencyCartAggregate = await GetOrCreateCartFromCommandAsync(request);
+
+            var newCurrencyCartRequest = new ChangeCartCurrencyCommand
+            {
+                StoreId = request.StoreId ?? currentCurrencyCartAggregate.Cart.StoreId,
+                CartName = request.CartName ?? currentCurrencyCartAggregate.Cart.Name,
+                CartType = request.CartType ?? currentCurrencyCartAggregate.Cart.Type,
+                UserId = request.UserId ?? currentCurrencyCartAggregate.Cart.CustomerId,
+                OrganizationId = request.OrganizationId ?? currentCurrencyCartAggregate.Cart.OrganizationId,
+                CultureName = request.CultureName ?? currentCurrencyCartAggregate.Cart.LanguageCode,
+                CurrencyCode = request.NewCurrencyCode,
+            };
+
+            var newCurrencyCartAggregate = await GetOrCreateCartFromCommandAsync(newCurrencyCartRequest);
+
+            // clear (old) cart items and add items from the currency cart
+            newCurrencyCartAggregate.Cart.Items.Clear();
+
+            var newCartItems = currentCurrencyCartAggregate.LineItems
+                .Select(x => new NewCartItem(x.ProductId, x.Quantity)
+                {
+                    IgnoreValidationErrors = true,
+                    Comment = x.Note,
+                    IsSelectedForCheckout = x.SelectedForCheckout,
+                    DynamicProperties = x.DynamicProperties.SelectMany(x => x.Values.Select(y => new DynamicPropertyValue()
+                    {
+                        Name = x.Name,
+                        Value = y.Value,
+                        Locale = y.Locale,
+                    })).ToArray(),
+                })
+                .ToArray();
+
+            await newCurrencyCartAggregate.AddItemsAsync(newCartItems);
+
+            await CartRepository.SaveAsync(newCurrencyCartAggregate);
+            return newCurrencyCartAggregate;
+        }
+    }
+}

src/VirtoCommerce.XCart.Data/Schemas/PurchaseSchema.cs

@@ -848,6 +848,25 @@ public void Build(ISchema schema)
 
             schema.Mutation.AddField(margeCartField);
 
+            var changeCartCurrency = FieldBuilder.Create<CartAggregate, CartAggregate>(GraphTypeExtenstionHelper.GetActualType<CartType>())
+                                 .Name("changeCartCurrency")
+                                 .Argument(GraphTypeExtenstionHelper.GetActualComplexType<NonNullGraphType<InputChangeCartCurrencyType>>(), SchemaConstants.CommandName)
+                                 .ResolveSynchronizedAsync(CartPrefix, "userId", _distributedLockService, async context =>
+                                 {
+                                     var cartCommand = context.GetCartCommand<ChangeCartCurrencyCommand>();
+
+                                     await CheckAuthByCartCommandAsync(context, cartCommand);
+
+                                     //We need to add cartAggregate to the context to be able use it on nested cart types resolvers (e.g for currency)
+                                     var cartAggregate = await _mediator.Send(cartCommand);
+
+                                     //store cart aggregate in the user context for future usage in the graph types resolvers
+                                     context.SetExpandedObjectGraph(cartAggregate);
+                                     return cartAggregate;
+                                 }).FieldType;
+
+            schema.Mutation.AddField(changeCartCurrency);
+
             /// <example>
             /// This is an example JSON request for a mutation
             /// {