feat: added get subcategories command

src/modules/Admin/Mint.WebApp.Admin/Operations/Commands/SubCategories/GetSubCategoriesCommand.cs

@@ -1,6 +1,9 @@
-using Mint.Domain.Helpers;
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using Mint.Domain.Helpers;
 using Mint.Infrastructure.MessageBrokers.Interfaces;
 using Mint.WebApp.Admin.Operations.Dtos.SubCategories;
+using Mint.WebApp.Admin.Repositories.Interfaces;
 
 namespace Mint.WebApp.Admin.Operations.Commands.SubCategories;
 
@@ -10,11 +13,37 @@ public sealed record GetSubCategoriesCommand(
     int PageSize = 50
 ) : ICommand<PaginatedResult<SubCategoryDTO>>;
 
-internal sealed class GetSubCategoriesCommandHandler 
-    : ICommandHandler<GetSubCategoriesCommand, PaginatedResult<SubCategoryDTO>>
+internal sealed class GetSubCategoriesCommandHandler(
+    ISubCategoryRepository subCategoryRepository,
+    IMapper mapper
+) : ICommandHandler<GetSubCategoriesCommand, PaginatedResult<SubCategoryDTO>>
 {
-    public Task<PaginatedResult<SubCategoryDTO>> Handle(GetSubCategoriesCommand request, CancellationToken cancellationToken)
+    private readonly ISubCategoryRepository _subCategoryRepository = subCategoryRepository;
+    private readonly IMapper _mapper = mapper;
+
+    public async Task<PaginatedResult<SubCategoryDTO>> Handle(GetSubCategoriesCommand request, CancellationToken cancellationToken)
     {
-        throw new NotImplementedException();
+        var query = _subCategoryRepository.Context.SubCategories.AsQueryable();
+
+        if (!string.IsNullOrEmpty(request.Search))
+            query = query.Where(x => x.Name.Contains(request.Search));
+
+        var subCategories = query
+            .AsNoTracking()
+            .Include(x => x.Category)
+            .Take(request.PageSize)
+            .ToListAsync(cancellationToken);
+
+        var totalCount = await _subCategoryRepository
+            .Context
+            .Categories
+            .AsNoTracking()
+            .CountAsync(cancellationToken);
+
+        return new PaginatedResult<SubCategoryDTO>
+        {
+            Items = _mapper.Map<List<SubCategoryDTO>>(subCategories),
+            TotalCount = totalCount
+        };
     }
 }