Holy moly......

src/Imprink.Application/Commands/ProductVariants/CreateProductVariant.cs

@@ -0,0 +1,51 @@
+using AutoMapper;
+using Imprink.Application.Dtos;
+using Imprink.Domain.Entities;
+using MediatR;
+
+namespace Imprink.Application.Commands.ProductVariants;
+
+public class CreateProductVariantCommand : IRequest<ProductVariantDto>
+{
+    public Guid ProductId { get; set; }
+    public string Size { get; set; } = null!;
+    public string? Color { get; set; }
+    public decimal Price { get; set; }
+    public string? ImageUrl { get; set; }
+    public string Sku { get; set; } = null!;
+    public int StockQuantity { get; set; }
+    public bool IsActive { get; set; } = true;
+}
+
+public class CreateProductVariant(
+    IUnitOfWork unitOfWork, 
+    IMapper mapper)
+    : IRequestHandler<CreateProductVariantCommand, ProductVariantDto>
+{
+    public async Task<ProductVariantDto> Handle(
+        CreateProductVariantCommand request, 
+        CancellationToken cancellationToken)
+    {
+        await unitOfWork.BeginTransactionAsync(cancellationToken);
+        
+        try
+        {
+            var productVariant = mapper.Map<ProductVariant>(request);
+            
+            productVariant.Product = null!;
+
+            var createdVariant = await unitOfWork.ProductVariantRepository
+                .AddAsync(productVariant, cancellationToken);
+            
+            await unitOfWork.SaveAsync(cancellationToken);
+            await unitOfWork.CommitTransactionAsync(cancellationToken);
+            
+            return mapper.Map<ProductVariantDto>(createdVariant);
+        }
+        catch
+        {
+            await unitOfWork.RollbackTransactionAsync(cancellationToken);
+            throw;
+        }
+    }
+}