Restructure mediator files

src/Imprink.Application/Products/Query/GetProductVariantsHandler.cs

@@ -0,0 +1,69 @@
+using Imprink.Application.Products.Dtos;
+using Imprink.Domain.Entities.Product;
+using MediatR;
+
+namespace Imprink.Application.Products.Query;
+
+public class GetProductVariantsQuery : IRequest<IEnumerable<ProductVariantDto>>
+{
+    public Guid? ProductId { get; set; }
+    public bool? IsActive { get; set; }
+    public bool InStockOnly { get; set; } = false;
+}
+
+public class GetProductVariantsHandler(IUnitOfWork unitOfWork)
+    : IRequestHandler<GetProductVariantsQuery, IEnumerable<ProductVariantDto>>
+{
+    public async Task<IEnumerable<ProductVariantDto>> Handle(GetProductVariantsQuery request, CancellationToken cancellationToken)
+    {
+        IEnumerable<ProductVariant> variants;
+
+        if (request.ProductId.HasValue)
+        {
+            if (request.InStockOnly)
+            {
+                variants = await unitOfWork.ProductVariantRepository.GetInStockByProductIdAsync(request.ProductId.Value, cancellationToken);
+            }
+            else if (request.IsActive.HasValue && request.IsActive.Value)
+            {
+                variants = await unitOfWork.ProductVariantRepository.GetActiveByProductIdAsync(request.ProductId.Value, cancellationToken);
+            }
+            else
+            {
+                variants = await unitOfWork.ProductVariantRepository.GetByProductIdAsync(request.ProductId.Value, cancellationToken);
+            }
+        }
+        else
+        {
+            variants = new List<ProductVariant>();
+        }
+
+        return variants.Select(pv => new ProductVariantDto
+        {
+            Id = pv.Id,
+            ProductId = pv.ProductId,
+            Size = pv.Size,
+            Color = pv.Color,
+            Price = pv.Price,
+            ImageUrl = pv.ImageUrl,
+            Sku = pv.Sku,
+            StockQuantity = pv.StockQuantity,
+            IsActive = pv.IsActive,
+            Product = new ProductDto
+            {
+                Id = pv.Product.Id,
+                Name = pv.Product.Name,
+                Description = pv.Product.Description,
+                BasePrice = pv.Product.BasePrice,
+                IsCustomizable = pv.Product.IsCustomizable,
+                IsActive = pv.Product.IsActive,
+                ImageUrl = pv.Product.ImageUrl,
+                CategoryId = pv.Product.CategoryId,
+                CreatedAt = pv.Product.CreatedAt,
+                ModifiedAt = pv.Product.ModifiedAt
+            },
+            CreatedAt = pv.CreatedAt,
+            ModifiedAt = pv.ModifiedAt
+        });
+    }
+}