feat/Update_Controllers_to_Allow_for_Premium_Membership

JobTrackerApi/Services/CurrentUserService.cs

@@ -10,11 +10,28 @@ public interface ICurrentUserService
 public sealed class CurrentUserService : ICurrentUserService
 {
     private readonly IHttpContextAccessor _http;
+    private string? _backgroundUserId;
 
     public CurrentUserService(IHttpContextAccessor http)
     {
         _http = http;
     }
 
-    public string? UserId => LocalAuthIdentity.GetRequiredUserId(_http.HttpContext?.User);
+    public string? UserId => _backgroundUserId ?? LocalAuthIdentity.GetRequiredUserId(_http.HttpContext?.User);
+
+    public IDisposable UseBackgroundUser(string userId)
+    {
+        if (string.IsNullOrWhiteSpace(userId)) throw new ArgumentException("A background owner is required.", nameof(userId));
+        if (_http.HttpContext is not null) throw new InvalidOperationException("Background owner scope cannot replace an HTTP request identity.");
+
+        var previous = _backgroundUserId;
+        _backgroundUserId = userId;
+        return new Reset(() => _backgroundUserId = previous);
+    }
+
+    private sealed class Reset(Action reset) : IDisposable
+    {
+        private Action? _reset = reset;
+        public void Dispose() => Interlocked.Exchange(ref _reset, null)?.Invoke();
+    }
 }