chore: correct namespaces and hiearchy

src/TrackApi/TrackQrApi/Features/Domains/Endpoints/DeleteDomainEndpoint.cs

@@ -0,0 +1,56 @@
+using System.Security.Claims;
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using TrackQrApi.Data;
+using TrackQrApi.Features.Auth.Common;
+
+namespace TrackQrApi.Features.Domains.Endpoints;
+
+public class DeleteDomainRequest
+{
+    public Guid WorkspaceId { get; set; }
+    public Guid Id { get; set; }
+}
+
+public class DeleteDomainEndpoint(AppDbContext db)
+    : Endpoint<DeleteDomainRequest>
+{
+    public override void Configure()
+    {
+        Delete("/workspaces/{WorkspaceId}/domains/{Id}");
+    }
+
+    public override async Task HandleAsync(DeleteDomainRequest req, CancellationToken ct)
+    {
+        var userId = Guid.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)!);
+
+        var domain = await db.Domains
+            .Include(d => d.Workspace)
+            .FirstOrDefaultAsync(
+                d => d.Id == req.Id && d.WorkspaceId == req.WorkspaceId && d.Workspace.OwnerUserId == userId, ct);
+
+        if (domain is null)
+        {
+            await HttpContext.Response.SendAsync(new MessageResponse("Domain not found"), 404, cancellation: ct);
+            return;
+        }
+
+        // Check if any links are using this domain
+        var linksUsingDomain = await db.ShortLinks
+            .AnyAsync(l => l.DomainId == domain.Id, ct);
+
+        if (linksUsingDomain)
+        {
+            await HttpContext.Response.SendAsync(
+                new MessageResponse("Cannot delete domain: it has associated short links"),
+                400,
+                cancellation: ct);
+            return;
+        }
+
+        db.Domains.Remove(domain);
+        await db.SaveChangesAsync(ct);
+
+        await HttpContext.Response.SendAsync(new MessageResponse("Domain deleted"), cancellation: ct);
+    }
+}