implement fix

dotnet/AipsCore/Domain/Models/Whiteboard/Whiteboard.AddUser.cs

@@ -24,12 +24,12 @@ public partial class Whiteboard : DomainModel<WhiteboardId>
         }
 
         membership = WhiteboardMembership.WhiteboardMembership.Create(
-            this.Id.ToString(),
-            user.Id.ToString(),
+            this.Id.IdValue,
+            user.Id.IdValue,
             false,
             false,
             this.GetCanJoin(),
-            DateTime.Now
+            DateTime.UtcNow
         );
         
         await membershipRepository.AddAsync(membership, cancellationToken);

dotnet/AipsCore/Domain/Models/Whiteboard/Whiteboard.cs

@@ -95,18 +95,15 @@ public partial class Whiteboard : DomainModel<WhiteboardId>
         string ownerId,
         string code,
         string title,
-        DateTime createdAt,
-        DateTime? deletedAt,
         int maxParticipants,
-        WhiteboardJoinPolicy joinPolicy,
-        WhiteboardState state)
+        WhiteboardJoinPolicy joinPolicy)
     {
         var whiteboardId = WhiteboardId.Any();
         var whiteboardOwnerId = new UserId(ownerId);
         var whiteboardCode = new WhiteboardCode(code);
         var whiteboardTitle = new WhiteboardTitle(title);
-        var whiteboardCreatedAt = new WhiteboardCreatedAt(createdAt);
-        var whiteboardDeletedAt = new WhiteboardDeletedAt(deletedAt);
+        var whiteboardCreatedAt = new WhiteboardCreatedAt(DateTime.UtcNow);
+        var whiteboardDeletedAt = new WhiteboardDeletedAt(null);
         var whiteboardMaxParticipants = new WhiteboardMaxParticipants(maxParticipants);
         
         return new Whiteboard(
@@ -118,6 +115,6 @@ public partial class Whiteboard : DomainModel<WhiteboardId>
             whiteboardDeletedAt,
             whiteboardMaxParticipants,
             joinPolicy,
-            state);
+            WhiteboardState.Active);
     }
 }