Add category products query and update endpoints

src/BackOffice.BFF.Application/ProductsCQ/Commands/UpdateCategoryProducts/UpdateCategoryProductsCommand.cs

@@ -0,0 +1,8 @@
+namespace BackOffice.BFF.Application.ProductsCQ.Commands.UpdateCategoryProducts;
+
+public record UpdateCategoryProductsCommand : IRequest<Unit>
+{
+    public long CategoryId { get; init; }
+    public IReadOnlyCollection<long> ProductIds { get; init; } = Array.Empty<long>();
+}
+

src/BackOffice.BFF.Application/ProductsCQ/Commands/UpdateCategoryProducts/UpdateCategoryProductsCommandHandler.cs

@@ -0,0 +1,62 @@
+using BackOffice.BFF.Application.Common.Interfaces;
+using CMSPruductCategory = CMSMicroservice.Protobuf.Protos.PruductCategory;
+
+namespace BackOffice.BFF.Application.ProductsCQ.Commands.UpdateCategoryProducts;
+
+public class UpdateCategoryProductsCommandHandler : IRequestHandler<UpdateCategoryProductsCommand, Unit>
+{
+    private readonly IApplicationContractContext _context;
+
+    public UpdateCategoryProductsCommandHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<Unit> Handle(UpdateCategoryProductsCommand request, CancellationToken cancellationToken)
+    {
+        var targetIds = request.ProductIds?.ToHashSet() ?? new HashSet<long>();
+
+        // load existing links for this category
+        var existingRequest = new CMSPruductCategory.GetAllPruductCategoryByFilterRequest
+        {
+            Filter = new CMSPruductCategory.GetAllPruductCategoryByFilterFilter
+            {
+                CategoryId = request.CategoryId
+            },
+            PaginationState = new CMSMicroservice.Protobuf.Protos.PaginationState
+            {
+                PageNumber = 1,
+                PageSize = 1000
+            }
+        };
+
+        var existingResponse = await _context.ProductCategories.GetAllPruductCategoryByFilterAsync(existingRequest, cancellationToken: cancellationToken);
+        var existing = existingResponse.Models ?? new();
+
+        var existingIds = existing.Select(x => x.ProductId).ToHashSet();
+
+        var toAdd = targetIds.Except(existingIds).ToList();
+        var toRemove = existing.Where(x => !targetIds.Contains(x.ProductId)).ToList();
+
+        foreach (var productId in toAdd)
+        {
+            var createRequest = new CMSPruductCategory.CreateNewPruductCategoryRequest
+            {
+                ProductId = productId,
+                CategoryId = request.CategoryId
+            };
+
+            await _context.ProductCategories.CreateNewPruductCategoryAsync(createRequest, cancellationToken: cancellationToken);
+        }
+
+        foreach (var rel in toRemove)
+        {
+            await _context.ProductCategories.DeletePruductCategoryAsync(
+                new CMSPruductCategory.DeletePruductCategoryRequest { Id = rel.Id },
+                cancellationToken: cancellationToken);
+        }
+
+        return Unit.Value;
+    }
+}
+

src/BackOffice.BFF.Application/ProductsCQ/Queries/GetProductsForCategory/GetProductsForCategoryQuery.cs

@@ -0,0 +1,7 @@
+namespace BackOffice.BFF.Application.ProductsCQ.Queries.GetProductsForCategory;
+
+public record GetProductsForCategoryQuery : IRequest<GetProductsForCategoryResponseDto>
+{
+    public long CategoryId { get; init; }
+}
+

src/BackOffice.BFF.Application/ProductsCQ/Queries/GetProductsForCategory/GetProductsForCategoryQueryHandler.cs

@@ -0,0 +1,66 @@
+using BackOffice.BFF.Application.Common.Interfaces;
+using CMSProducts = CMSMicroservice.Protobuf.Protos.Products;
+using CMSPruductCategory = CMSMicroservice.Protobuf.Protos.PruductCategory;
+
+namespace BackOffice.BFF.Application.ProductsCQ.Queries.GetProductsForCategory;
+
+public class GetProductsForCategoryQueryHandler : IRequestHandler<GetProductsForCategoryQuery, GetProductsForCategoryResponseDto>
+{
+    private readonly IApplicationContractContext _context;
+
+    public GetProductsForCategoryQueryHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<GetProductsForCategoryResponseDto> Handle(GetProductsForCategoryQuery request, CancellationToken cancellationToken)
+    {
+        // Load all products
+        var productsRequest = new CMSProducts.GetAllProductsByFilterRequest
+        {
+            Filter = new CMSProducts.GetAllProductsByFilterFilter(),
+            PaginationState = new CMSMicroservice.Protobuf.Protos.PaginationState
+            {
+                PageNumber = 1,
+                PageSize = 1000
+            }
+        };
+
+        var productsResponse = await _context.Products.GetAllProductsByFilterAsync(productsRequest, cancellationToken: cancellationToken);
+        var products = productsResponse.Models ?? new();
+
+        // Load links for this category
+        var linksRequest = new CMSPruductCategory.GetAllPruductCategoryByFilterRequest
+        {
+            Filter = new CMSPruductCategory.GetAllPruductCategoryByFilterFilter
+            {
+                CategoryId = request.CategoryId
+            },
+            PaginationState = new CMSMicroservice.Protobuf.Protos.PaginationState
+            {
+                PageNumber = 1,
+                PageSize = 1000
+            }
+        };
+
+        var linksResponse = await _context.ProductCategories.GetAllPruductCategoryByFilterAsync(linksRequest, cancellationToken: cancellationToken);
+        var links = linksResponse.Models ?? new();
+
+        var selectedProductIds = links.Select(l => l.ProductId).ToHashSet();
+
+        var result = new GetProductsForCategoryResponseDto
+        {
+            Items = products
+                .Select(p => new CategoryProductItemDto
+                {
+                    Id = p.Id,
+                    Title = p.Title,
+                    Selected = selectedProductIds.Contains(p.Id)
+                })
+                .ToList()
+        };
+
+        return result;
+    }
+}
+

src/BackOffice.BFF.Application/ProductsCQ/Queries/GetProductsForCategory/GetProductsForCategoryResponseDto.cs

@@ -0,0 +1,14 @@
+namespace BackOffice.BFF.Application.ProductsCQ.Queries.GetProductsForCategory;
+
+public class GetProductsForCategoryResponseDto
+{
+    public List<CategoryProductItemDto> Items { get; set; } = new();
+}
+
+public class CategoryProductItemDto
+{
+    public long Id { get; set; }
+    public string Title { get; set; } = string.Empty;
+    public bool Selected { get; set; }
+}
+

src/BackOffice.BFF.WebApi/Common/Mappings/ProductsProfile.cs

@@ -1,6 +1,8 @@
 namespace BackOffice.BFF.WebApi.Common.Mappings;
 
 using BackOffice.BFF.Application.ProductsCQ.Queries.GetCategories;
+using BackOffice.BFF.Application.ProductsCQ.Queries.GetProductsForCategory;
+using BackOffice.BFF.Application.ProductsCQ.Queries.GetProductGallery;
 using BackOffice.BFF.Products.Protobuf.Protos.Products;
 
 public class ProductsProfile : IRegister
@@ -22,6 +24,39 @@ public class ProductsProfile : IRegister
                         })
                 }
             });
+
+        // Map GetProductsForCategory response DTO to protobuf response
+        config.NewConfig<GetProductsForCategoryResponseDto, GetProductsForCategoryResponse>()
+            .MapWith(src => new GetProductsForCategoryResponse
+            {
+                Items =
+                {
+                    (src.Items ?? Enumerable.Empty<CategoryProductItemDto>())
+                        .Select(x => new CategoryProductItem
+                        {
+                            Id = x.Id,
+                            Title = x.Title ?? string.Empty,
+                            Selected = x.Selected
+                        })
+                }
+            });
+
+        // Map GetProductGallery response DTO to protobuf response
+        config.NewConfig<GetProductGalleryResponseDto, GetProductGalleryResponse>()
+            .MapWith(src => new GetProductGalleryResponse
+            {
+                Items =
+                {
+                    (src.Items ?? Enumerable.Empty<ProductGalleryItemDto>())
+                        .Select(x => new ProductGalleryItem
+                        {
+                            ProductGalleryId = x.ProductGalleryId,
+                            ProductImageId = x.ProductImageId,
+                            Title = x.Title ?? string.Empty,
+                            ImagePath = x.ImagePath ?? string.Empty,
+                            ImageThumbnailPath = x.ImageThumbnailPath ?? string.Empty
+                        })
+                }
+            });
     }
 }
-

src/BackOffice.BFF.WebApi/Services/ProductsService.cs

@@ -10,6 +10,8 @@ using BackOffice.BFF.Application.ProductsCQ.Queries.GetProductGallery;
 using BackOffice.BFF.Application.ProductsCQ.Commands.RemoveProductImage;
 using BackOffice.BFF.Application.ProductsCQ.Queries.GetCategories;
 using BackOffice.BFF.Application.ProductsCQ.Commands.UpdateProductCategories;
+using BackOffice.BFF.Application.ProductsCQ.Queries.GetProductsForCategory;
+using BackOffice.BFF.Application.ProductsCQ.Commands.UpdateCategoryProducts;
 
 namespace BackOffice.BFF.WebApi.Services;
 
@@ -71,4 +73,14 @@ public class ProductsService : ProductsContract.ProductsContractBase
     {
         return await _dispatchRequestToCQRS.Handle<UpdateProductCategoriesRequest, UpdateProductCategoriesCommand>(request, context);
     }
+
+    public override async Task<GetProductsForCategoryResponse> GetProductsForCategory(GetProductsForCategoryRequest request, ServerCallContext context)
+    {
+        return await _dispatchRequestToCQRS.Handle<GetProductsForCategoryRequest, GetProductsForCategoryQuery, GetProductsForCategoryResponse>(request, context);
+    }
+
+    public override async Task<Empty> UpdateCategoryProducts(UpdateCategoryProductsRequest request, ServerCallContext context)
+    {
+        return await _dispatchRequestToCQRS.Handle<UpdateCategoryProductsRequest, UpdateCategoryProductsCommand>(request, context);
+    }
 }

src/Protobufs/BackOffice.BFF.Products.Protobuf/BackOffice.BFF.Products.Protobuf.csproj

@@ -4,7 +4,7 @@
 		<TargetFramework>net9.0</TargetFramework>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
-		<Version>0.0.3</Version>
+		<Version>0.0.4</Version>
 		<DebugType>None</DebugType>
 		<DebugSymbols>False</DebugSymbols>
 		<GeneratePackageOnBuild>False</GeneratePackageOnBuild>

src/Protobufs/BackOffice.BFF.Products.Protobuf/Protos/products.proto

@@ -73,6 +73,19 @@ service ProductsContract
       body: "*"
     };
   };
+
+  rpc GetProductsForCategory(GetProductsForCategoryRequest) returns (GetProductsForCategoryResponse){
+    option (google.api.http) = {
+      get: "/GetProductsForCategory"
+    };
+  };
+
+  rpc UpdateCategoryProducts(UpdateCategoryProductsRequest) returns (google.protobuf.Empty){
+    option (google.api.http) = {
+      post: "/UpdateCategoryProducts"
+      body: "*"
+    };
+  };
 }
 
 message ImageFileModel
@@ -269,3 +282,26 @@ message UpdateProductCategoriesRequest
   int64 product_id = 1;
   repeated int64 category_ids = 2;
 }
+
+message CategoryProductItem
+{
+  int64 id = 1;
+  string title = 2;
+  bool selected = 3;
+}
+
+message GetProductsForCategoryRequest
+{
+  int64 category_id = 1;
+}
+
+message GetProductsForCategoryResponse
+{
+  repeated CategoryProductItem items = 1;
+}
+
+message UpdateCategoryProductsRequest
+{
+  int64 category_id = 1;
+  repeated int64 product_ids = 2;
+}