update 2

src/BackOffice.BFF.Application/ProductsCQ/Queries/GetProductGallery/GetProductGalleryQuery.cs

@@ -0,0 +1,7 @@
+namespace BackOffice.BFF.Application.ProductsCQ.Queries.GetProductGallery;
+
+public record GetProductGalleryQuery : IRequest<GetProductGalleryResponseDto>
+{
+    public long ProductId { get; init; }
+}
+

src/BackOffice.BFF.Application/ProductsCQ/Queries/GetProductGallery/GetProductGalleryQueryHandler.cs

@@ -0,0 +1,55 @@
+using BackOffice.BFF.Application.Common.Interfaces;
+using CMSMicroservice.Protobuf.Protos.ProductGallerys;
+using CMSMicroservice.Protobuf.Protos.ProductImages;
+
+namespace BackOffice.BFF.Application.ProductsCQ.Queries.GetProductGallery;
+
+public class GetProductGalleryQueryHandler : IRequestHandler<GetProductGalleryQuery, GetProductGalleryResponseDto>
+{
+    private readonly IApplicationContractContext _context;
+
+    public GetProductGalleryQueryHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<GetProductGalleryResponseDto> Handle(GetProductGalleryQuery request, CancellationToken cancellationToken)
+    {
+        var galleryRequest = new GetAllProductGallerysByFilterRequest
+        {
+            Filter = new GetAllProductGallerysByFilterFilter()
+        };
+
+        var galleryResponse = await _context.ProductGallerys.GetAllProductGallerysByFilterAsync(galleryRequest, cancellationToken: cancellationToken);
+
+        // Filter by product id on client side because generated type may not support assigning Int64Value directly
+        var filteredModels = galleryResponse?.Models?.Where(x => x.ProductId == request.ProductId).ToList();
+
+        var result = new GetProductGalleryResponseDto();
+
+        if (filteredModels == null || filteredModels.Count == 0)
+            return result;
+
+        foreach (var item in filteredModels)
+        {
+            var image = await _context.ProductImages.GetProductImagesAsync(new GetProductImagesRequest
+            {
+                Id = item.ProductImageId
+            }, cancellationToken: cancellationToken);
+
+            if (image == null)
+                continue;
+
+            result.Items.Add(new ProductGalleryItemDto
+            {
+                ProductGalleryId = item.Id,
+                ProductImageId = item.ProductImageId,
+                Title = image.Title,
+                ImagePath = image.ImagePath,
+                ImageThumbnailPath = image.ImageThumbnailPath
+            });
+        }
+
+        return result;
+    }
+}

src/BackOffice.BFF.Application/ProductsCQ/Queries/GetProductGallery/GetProductGalleryResponseDto.cs

@@ -0,0 +1,16 @@
+namespace BackOffice.BFF.Application.ProductsCQ.Queries.GetProductGallery;
+
+public class GetProductGalleryResponseDto
+{
+    public List<ProductGalleryItemDto> Items { get; set; } = new();
+}
+
+public class ProductGalleryItemDto
+{
+    public long ProductGalleryId { get; set; }
+    public long ProductImageId { get; set; }
+    public string Title { get; set; }
+    public string ImagePath { get; set; }
+    public string ImageThumbnailPath { get; set; }
+}
+