✨ Added list categories (#115)

Added list categories

Author: danielmackay

src/DDD.Application/Categories/Queries/GetAllCategories/CategoryDto.cs

@@ -0,0 +1,3 @@
+namespace DDD.Application.Categories.Queries.GetAllCategories;
+
+public record CategoryDto(Guid Id, string Name);

src/DDD.Application/Categories/Queries/GetAllCategories/GetAllCategoriesQuery.cs

@@ -0,0 +1,20 @@
+namespace DDD.Application.Categories.Queries.GetAllCategories;
+
+public record GetAllCategoriesQuery : IRequest<IEnumerable<CategoryDto>>;
+
+public class GetAllCategoriesQueryHandler : IRequestHandler<GetAllCategoriesQuery, IEnumerable<CategoryDto>>
+{
+    private readonly IApplicationDbContext _dbContext;
+
+    public GetAllCategoriesQueryHandler(IApplicationDbContext dbContext)
+    {
+        _dbContext = dbContext;
+    }
+
+    public async Task<IEnumerable<CategoryDto>> Handle(GetAllCategoriesQuery request, CancellationToken cancellationToken)
+    {
+        return await _dbContext.Categories
+            .Select(c => new CategoryDto(c.Id.Value, c.Name))
+            .ToListAsync(cancellationToken);
+    }
+}

src/DDD.WebApi/Endpoints/CategoryEndpoints.cs

@@ -1,4 +1,5 @@
-using DDD.Application.Categorys.Commands.CreateCategory;
+using DDD.Application.Categories.Queries.GetAllCategories;
+using DDD.Application.Categorys.Commands.CreateCategory;
 using DDD.WebApi.Extensions;
 using MediatR;
 
@@ -13,10 +14,10 @@ public static void MapCategoryEndpoints(this WebApplication app)
             .WithTags("Categories")
             .WithOpenApi();
 
-        //group
-        //    .MapGet("/", async (ISender sender, CancellationToken ct) => await sender.Send(new GetAllProductsQuery(), ct))
-        //    .WithName("GetProducts")
-        //    .ProducesGet<ProductDto[]>();
+        group
+            .MapGet("/", async (ISender sender, CancellationToken ct) => await sender.Send(new GetAllCategoriesQuery(), ct))
+            .WithName("GetCategories")
+            .ProducesGet<CategoryDto[]>();
 
         group
             .MapPost("/", async (ISender sender, CreateCategoryCommand command, CancellationToken ct) => await sender.Send(command, ct))