first commit

services/csharp/example/Features/Todos/GetTodos.cs

@@ -0,0 +1,24 @@
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using SequenceAuth.Example.Domain;
+using SequenceAuth.Example.Infrastructure;
+
+namespace SequenceAuth.Example.Features.Todos;
+
+public record GetTodosQuery(Guid UserId, TodoStatus? StatusFilter) : IRequest<List<TodoItem>>;
+
+public class GetTodosQueryHandler(AppDbContext dbContext) : IRequestHandler<GetTodosQuery, List<TodoItem>>
+{
+    public async Task<List<TodoItem>> Handle(GetTodosQuery request, CancellationToken cancellationToken)
+    {
+        var query = dbContext.Todos.Where(t => t.UserId == request.UserId);
+        
+        query = request.StatusFilter switch
+        {
+            null => query,
+            var status => query.Where(t => t.Status == status)
+        };
+
+        return await query.ToListAsync(cancellationToken);
+    }
+}