implement fix

dotnet/AipsCore/Application/Models/Whiteboard/Command/CreateWhiteboard/CreateWhiteboardCommand.cs

@@ -8,9 +8,6 @@ namespace AipsCore.Application.Models.Whiteboard.Command.CreateWhiteboard;
 public record CreateWhiteboardCommand(
     string OwnerId,
     string Title,
-    DateTime CreatedAt,
-    DateTime DeletedAt,
     int MaxParticipants,
-    WhiteboardJoinPolicy JoinPolicy,
-    WhiteboardState State)
+    WhiteboardJoinPolicy JoinPolicy)
     : ICommand<WhiteboardId>;

dotnet/AipsCore/Application/Models/Whiteboard/Command/CreateWhiteboard/CreateWhiteboardCommandHandler.cs

@@ -24,11 +24,8 @@ public class CreateWhiteboardCommandHandler : ICommandHandler<CreateWhiteboardCo
             command.OwnerId,
             whiteboardCode.CodeValue,
             command.Title,
-            command.CreatedAt,
-            command.DeletedAt,
             command.MaxParticipants,
-            command.JoinPolicy,
-            command.State);
+            command.JoinPolicy);
 
         await _whiteboardRepository.SaveAsync(whiteboard, cancellationToken);
         await _unitOfWork.SaveChangesAsync(cancellationToken);

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);
     }
 }

dotnet/AipsWebApi/Controllers/WhiteboardController.cs

@@ -1,4 +1,5 @@
 using AipsCore.Application.Abstract;
+using AipsCore.Application.Models.Whiteboard.Command.AddUserToWhiteboard;
 using AipsCore.Application.Models.Whiteboard.Command.CreateWhiteboard;
 using Microsoft.AspNetCore.Mvc;
 
@@ -14,4 +15,12 @@ public class WhiteboardController : ControllerBase
         var whiteboardId = await dispatcher.Execute(command, cancellationToken);
         return Ok(whiteboardId.IdValue);
     }
+
+    [HttpPost("adduser")]
+    public async Task<IActionResult> AddUser(AddUserToWhiteboardCommand command, IDispatcher dispatcher,
+        CancellationToken cancellationToken)
+    {
+        await dispatcher.Execute(command, cancellationToken);
+        return Ok();
+    }
 }