Retructured solution

LiteCharms.Features/Shop/ShoppingCarts/Commands/UpdateShoppingCartItemCommand.cs

@@ -0,0 +1,30 @@
+namespace LiteCharms.Features.ShoppingCarts.Commands;
+
+public class UpdateShoppingCartItemCommand : IRequest<Result>
+{
+    public Guid ShoppingCartId { get; set; }
+
+    public Guid ShoppingCartItemId { get; set; }
+
+    public int Quantity { get; set; }
+
+    private UpdateShoppingCartItemCommand(Guid shoppingCartId, Guid shoppingCartItemId, int quantity = 1)
+    {
+        ShoppingCartId = shoppingCartId;
+        ShoppingCartItemId = shoppingCartItemId;
+        Quantity = quantity;
+    }
+
+    public static UpdateShoppingCartItemCommand Create(Guid shoppingCartId, Guid shoppingCartItemId, int quantity = 1)
+    {
+        if (shoppingCartId == Guid.Empty)
+            throw new ArgumentException($"Shopping cart ID is required", nameof(shoppingCartId));
+
+        if (shoppingCartItemId == Guid.Empty)
+            throw new ArgumentException($"Shopping cart item is required", nameof(shoppingCartItemId));
+
+        if (quantity <= 0) throw new ArgumentException($"Quantity must be at least 1", nameof(quantity));
+
+        return new(shoppingCartId, shoppingCartItemId, quantity);
+    }
+}