feat: Implement Discount Product and Shopping Cart functionalities

- Added UpdateDiscountProductCommandValidator for validating discount product updates.
- Created GetDiscountProductByIdQuery and its handler for retrieving discount product details by ID.
- Implemented GetDiscountProductsQuery and handler for fetching a list of discount products with filtering options.
- Developed AddToCartCommand and handler for adding products to the shopping cart.
- Implemented ClearCartCommand and handler for clearing the shopping cart.
- Created RemoveFromCartCommand and handler for removing items from the cart.
- Added UpdateCartItemCountCommand and handler for updating the quantity of items in the cart.
- Developed GetUserCartQuery and handler for retrieving the user's shopping cart details.
- Implemented Product Tag functionalities including assigning tags to products, creating, updating, and deleting tags.
- Added queries for fetching all tags and products by tag.

src/BackOffice.BFF.Application/TagCQ/Commands/CreateTag/CreateTagCommand.cs

@@ -0,0 +1,12 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Commands.CreateTag;
+
+public record CreateTagCommand : IRequest<long>
+{
+    public string Name { get; init; } = string.Empty;
+    public string Title { get; init; } = string.Empty;
+    public string? Description { get; init; }
+    public bool IsActive { get; init; } = true;
+    public int SortOrder { get; init; }
+}

src/BackOffice.BFF.Application/TagCQ/Commands/CreateTag/CreateTagCommandHandler.cs

@@ -0,0 +1,29 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Commands.CreateTag;
+
+public class CreateTagCommandHandler : IRequestHandler<CreateTagCommand, long>
+{
+    private readonly IApplicationContractContext _context;
+
+    public CreateTagCommandHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<long> Handle(CreateTagCommand request, CancellationToken cancellationToken)
+    {
+        var response = await _context.Tags.CreateNewTagAsync(
+            new CreateNewTagRequest
+            {
+                Name = request.Name,
+                Title = request.Title,
+                Description = request.Description,
+                IsActive = request.IsActive,
+                SortOrder = request.SortOrder
+            },
+            cancellationToken: cancellationToken);
+
+        return response.Id;
+    }
+}

src/BackOffice.BFF.Application/TagCQ/Commands/DeleteTag/DeleteTagCommand.cs

@@ -0,0 +1,6 @@
+namespace BackOffice.BFF.Application.TagCQ.Commands.DeleteTag;
+
+public record DeleteTagCommand : IRequest
+{
+    public long Id { get; init; }
+}

src/BackOffice.BFF.Application/TagCQ/Commands/DeleteTag/DeleteTagCommandHandler.cs

@@ -0,0 +1,25 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Commands.DeleteTag;
+
+public class DeleteTagCommandHandler : IRequestHandler<DeleteTagCommand>
+{
+    private readonly IApplicationContractContext _context;
+
+    public DeleteTagCommandHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<Unit> Handle(DeleteTagCommand request, CancellationToken cancellationToken)
+    {
+        await _context.Tags.DeleteTagAsync(
+            new DeleteTagRequest
+            {
+                Id = request.Id
+            },
+            cancellationToken: cancellationToken);
+
+        return Unit.Value;
+    }
+}

src/BackOffice.BFF.Application/TagCQ/Commands/UpdateTag/UpdateTagCommand.cs

@@ -0,0 +1,13 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Commands.UpdateTag;
+
+public record UpdateTagCommand : IRequest
+{
+    public long Id { get; init; }
+    public string Name { get; init; } = string.Empty;
+    public string Title { get; init; } = string.Empty;
+    public string? Description { get; init; }
+    public bool IsActive { get; init; }
+    public int SortOrder { get; init; }
+}

src/BackOffice.BFF.Application/TagCQ/Commands/UpdateTag/UpdateTagCommandHandler.cs

@@ -0,0 +1,30 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Commands.UpdateTag;
+
+public class UpdateTagCommandHandler : IRequestHandler<UpdateTagCommand>
+{
+    private readonly IApplicationContractContext _context;
+
+    public UpdateTagCommandHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<Unit> Handle(UpdateTagCommand request, CancellationToken cancellationToken)
+    {
+        await _context.Tags.UpdateTagAsync(
+            new UpdateTagRequest
+            {
+                Id = request.Id,
+                Name = request.Name,
+                Title = request.Title,
+                Description = request.Description,
+                IsActive = request.IsActive,
+                SortOrder = request.SortOrder
+            },
+            cancellationToken: cancellationToken);
+
+        return Unit.Value;
+    }
+}

src/BackOffice.BFF.Application/TagCQ/Queries/GetAllTags/GetAllTagsQuery.cs

@@ -0,0 +1,11 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Queries.GetAllTags;
+
+public record GetAllTagsQuery : IRequest<GetAllTagByFilterResponse>
+{
+    public int PageNumber { get; init; } = 1;
+    public int PageSize { get; init; } = 10;
+    public string? SearchTerm { get; init; }
+    public bool? IsActive { get; init; }
+}

src/BackOffice.BFF.Application/TagCQ/Queries/GetAllTags/GetAllTagsQueryHandler.cs

@@ -0,0 +1,41 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+using Google.Protobuf.WellKnownTypes;
+using CMSMicroservice.Protobuf.Protos;
+
+namespace BackOffice.BFF.Application.TagCQ.Queries.GetAllTags;
+
+public class GetAllTagsQueryHandler : IRequestHandler<GetAllTagsQuery, GetAllTagByFilterResponse>
+{
+    private readonly IApplicationContractContext _context;
+
+    public GetAllTagsQueryHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<GetAllTagByFilterResponse> Handle(GetAllTagsQuery request, CancellationToken cancellationToken)
+    {
+        var grpcRequest = new GetAllTagByFilterRequest
+        {
+            PaginationState = new CMSMicroservice.Protobuf.Protos.PaginationState
+            {
+                PageNumber = request.PageNumber,
+                PageSize = request.PageSize
+            },
+            Filter = new GetAllTagByFilterFilter()
+        };
+
+        if (!string.IsNullOrEmpty(request.SearchTerm))
+        {
+            grpcRequest.Filter.Name = request.SearchTerm;
+        }
+
+        if (request.IsActive.HasValue)
+        {
+            grpcRequest.Filter.IsActive = request.IsActive.Value;
+        }
+
+        var response = await _context.Tags.GetAllTagByFilterAsync(grpcRequest, cancellationToken: cancellationToken);
+        return response;
+    }
+}

src/BackOffice.BFF.Application/TagCQ/Queries/GetProductsByTag/GetProductsByTagQuery.cs

@@ -0,0 +1,8 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Queries.GetProductsByTag;
+
+public record GetProductsByTagQuery : IRequest<GetProductsByTagResponse>
+{
+    public long TagId { get; init; }
+}

src/BackOffice.BFF.Application/TagCQ/Queries/GetProductsByTag/GetProductsByTagQueryHandler.cs

@@ -0,0 +1,22 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Queries.GetProductsByTag;
+
+public class GetProductsByTagQueryHandler : IRequestHandler<GetProductsByTagQuery, GetProductsByTagResponse>
+{
+    private readonly IApplicationContractContext _context;
+
+    public GetProductsByTagQueryHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<GetProductsByTagResponse> Handle(GetProductsByTagQuery request, CancellationToken cancellationToken)
+    {
+        var response = await _context.Tags.GetProductsByTagAsync(
+            new GetProductsByTagRequest { TagId = request.TagId },
+            cancellationToken: cancellationToken);
+
+        return response;
+    }
+}

src/BackOffice.BFF.Application/TagCQ/Queries/GetTag/GetTagQuery.cs

@@ -0,0 +1,8 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Queries.GetTag;
+
+public record GetTagQuery : IRequest<GetTagResponse>
+{
+    public long Id { get; init; }
+}

src/BackOffice.BFF.Application/TagCQ/Queries/GetTag/GetTagQueryHandler.cs

@@ -0,0 +1,22 @@
+using CMSMicroservice.Protobuf.Protos.Tag;
+
+namespace BackOffice.BFF.Application.TagCQ.Queries.GetTag;
+
+public class GetTagQueryHandler : IRequestHandler<GetTagQuery, GetTagResponse>
+{
+    private readonly IApplicationContractContext _context;
+
+    public GetTagQueryHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<GetTagResponse> Handle(GetTagQuery request, CancellationToken cancellationToken)
+    {
+        var response = await _context.Tags.GetTagAsync(
+            new GetTagRequest { Id = request.Id },
+            cancellationToken: cancellationToken);
+
+        return response;
+    }
+}