Fix storing outdated sessions in SyncPlay

Emby.Server.Implementations/Session/SessionManager.cs

@@ -1197,16 +1197,18 @@ namespace Emby.Server.Implementations.Session
         }
 
         /// <inheritdoc />
-        public async Task SendSyncPlayCommand(SessionInfo session, SendCommand command, CancellationToken cancellationToken)
+        public async Task SendSyncPlayCommand(string sessionId, SendCommand command, CancellationToken cancellationToken)
         {
             CheckDisposed();
+            var session = GetSession(sessionId);
             await SendMessageToSession(session, SessionMessageType.SyncPlayCommand, command, cancellationToken).ConfigureAwait(false);
         }
 
         /// <inheritdoc />
-        public async Task SendSyncPlayGroupUpdate<T>(SessionInfo session, GroupUpdate<T> command, CancellationToken cancellationToken)
+        public async Task SendSyncPlayGroupUpdate<T>(string sessionId, GroupUpdate<T> command, CancellationToken cancellationToken)
         {
             CheckDisposed();
+            var session = GetSession(sessionId);
             await SendMessageToSession(session, SessionMessageType.SyncPlayGroupUpdate, command, cancellationToken).ConfigureAwait(false);
         }
 

Emby.Server.Implementations/SyncPlay/Group.cs

@@ -162,26 +162,26 @@ namespace Emby.Server.Implementations.SyncPlay
         /// <summary>
         /// Filters sessions of this group.
         /// </summary>
-        /// <param name="from">The current session.</param>
+        /// <param name="fromId">The current session identifier.</param>
         /// <param name="type">The filtering type.</param>
         /// <returns>The list of sessions matching the filter.</returns>
-        private IEnumerable<SessionInfo> FilterSessions(SessionInfo from, SyncPlayBroadcastType type)
+        private IEnumerable<string> FilterSessions(string fromId, SyncPlayBroadcastType type)
         {
             return type switch
             {
-                SyncPlayBroadcastType.CurrentSession => new SessionInfo[] { from },
+                SyncPlayBroadcastType.CurrentSession => new string[] { fromId },
                 SyncPlayBroadcastType.AllGroup => _participants
                     .Values
-                    .Select(session => session.Session),
+                    .Select(member => member.SessionId),
                 SyncPlayBroadcastType.AllExceptCurrentSession => _participants
                     .Values
-                    .Select(session => session.Session)
+                    .Select(member => member.SessionId)
-                    .Where(session => !session.Id.Equals(from.Id, StringComparison.OrdinalIgnoreCase)),
+                    .Where(sessionId => !sessionId.Equals(fromId, StringComparison.OrdinalIgnoreCase)),
                 SyncPlayBroadcastType.AllReady => _participants
                     .Values
-                    .Where(session => !session.IsBuffering)
+                    .Where(member => !member.IsBuffering)
-                    .Select(session => session.Session),
+                    .Select(member => member.SessionId),
-                _ => Enumerable.Empty<SessionInfo>()
+                _ => Enumerable.Empty<string>()
             };
         }
 
@@ -223,7 +223,7 @@ namespace Emby.Server.Implementations.SyncPlay
             // Get list of users.
             var users = _participants
                 .Values
-                .Select(participant => _userManager.GetUserById(participant.Session.UserId));
+                .Select(participant => _userManager.GetUserById(participant.UserId));
 
             // Find problematic users.
             var usersWithNoAccess = users.Where(user => !HasAccessToQueue(user, queue));
@@ -351,7 +351,7 @@ namespace Emby.Server.Implementations.SyncPlay
         /// <returns>The group info for the clients.</returns>
         public GroupInfoDto GetInfo()
         {
-            var participants = _participants.Values.Select(session => session.Session.UserName).Distinct().ToList();
+            var participants = _participants.Values.Select(session => session.UserName).Distinct().ToList();
             return new GroupInfoDto(GroupId, GroupName, _state.Type, participants, DateTime.UtcNow);
         }
 
@@ -387,9 +387,9 @@ namespace Emby.Server.Implementations.SyncPlay
         {
             IEnumerable<Task> GetTasks()
             {
-                foreach (var session in FilterSessions(from, type))
+                foreach (var sessionId in FilterSessions(from.Id, type))
                 {
-                    yield return _sessionManager.SendSyncPlayGroupUpdate(session, message, cancellationToken);
+                    yield return _sessionManager.SendSyncPlayGroupUpdate(sessionId, message, cancellationToken);
                 }
             }
 
@@ -401,9 +401,9 @@ namespace Emby.Server.Implementations.SyncPlay
         {
             IEnumerable<Task> GetTasks()
             {
-                foreach (var session in FilterSessions(from, type))
+                foreach (var sessionId in FilterSessions(from.Id, type))
                 {
-                    yield return _sessionManager.SendSyncPlayCommand(session, message, cancellationToken);
+                    yield return _sessionManager.SendSyncPlayCommand(sessionId, message, cancellationToken);
                 }
             }
 

Emby.Server.Implementations/SyncPlay/SyncPlayManager.cs

@@ -158,7 +158,7 @@ namespace Emby.Server.Implementations.SyncPlay
                     _logger.LogWarning("Session {SessionId} tried to join group {GroupId} that does not exist.", session.Id, request.GroupId);
 
                     var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.GroupDoesNotExist, string.Empty);
-                    _sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
+                    _sessionManager.SendSyncPlayGroupUpdate(session.Id, error, CancellationToken.None);
                     return;
                 }
 
@@ -170,7 +170,7 @@ namespace Emby.Server.Implementations.SyncPlay
                         _logger.LogWarning("Session {SessionId} tried to join group {GroupId} but does not have access to some content of the playing queue.", session.Id, group.GroupId.ToString());
 
                         var error = new GroupUpdate<string>(group.GroupId, GroupUpdateType.LibraryAccessDenied, string.Empty);
-                        _sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
+                        _sessionManager.SendSyncPlayGroupUpdate(session.Id, error, CancellationToken.None);
                         return;
                     }
 
@@ -247,7 +247,7 @@ namespace Emby.Server.Implementations.SyncPlay
                     _logger.LogWarning("Session {SessionId} does not belong to any group.", session.Id);
 
                     var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
-                    _sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
+                    _sessionManager.SendSyncPlayGroupUpdate(session.Id, error, CancellationToken.None);
                     return;
                 }
             }
@@ -324,7 +324,7 @@ namespace Emby.Server.Implementations.SyncPlay
                 _logger.LogWarning("Session {SessionId} does not belong to any group.", session.Id);
 
                 var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
-                _sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
+                _sessionManager.SendSyncPlayGroupUpdate(session.Id, error, CancellationToken.None);
             }
         }
 

MediaBrowser.Controller/Session/ISessionManager.cs

@@ -156,20 +156,20 @@ namespace MediaBrowser.Controller.Session
         /// <summary>
         /// Sends a SyncPlayCommand to a session.
         /// </summary>
-        /// <param name="session">The session.</param>
+        /// <param name="sessionId">The identifier of the session.</param>
         /// <param name="command">The command.</param>
         /// <param name="cancellationToken">The cancellation token.</param>
         /// <returns>Task.</returns>
-        Task SendSyncPlayCommand(SessionInfo session, SendCommand command, CancellationToken cancellationToken);
+        Task SendSyncPlayCommand(string sessionId, SendCommand command, CancellationToken cancellationToken);
 
         /// <summary>
         /// Sends a SyncPlayGroupUpdate to a session.
         /// </summary>
-        /// <param name="session">The session.</param>
+        /// <param name="sessionId">The identifier of the session.</param>
         /// <param name="command">The group update.</param>
         /// <param name="cancellationToken">The cancellation token.</param>
         /// <returns>Task.</returns>
-        Task SendSyncPlayGroupUpdate<T>(SessionInfo session, GroupUpdate<T> command, CancellationToken cancellationToken);
+        Task SendSyncPlayGroupUpdate<T>(string sessionId, GroupUpdate<T> command, CancellationToken cancellationToken);
 
         /// <summary>
         /// Sends the browse command.

MediaBrowser.Controller/SyncPlay/GroupMember.cs

@@ -1,3 +1,4 @@
+using System;
 using MediaBrowser.Controller.Session;
 
 namespace MediaBrowser.Controller.SyncPlay
@@ -13,14 +14,28 @@ namespace MediaBrowser.Controller.SyncPlay
         /// <param name="session">The session.</param>
         public GroupMember(SessionInfo session)
         {
-            Session = session;
+            SessionId = session.Id;
+            UserId = session.UserId;
+            UserName = session.UserName;
         }
 
         /// <summary>
-        /// Gets the session.
+        /// Gets the identifier of the session.
         /// </summary>
-        /// <value>The session.</value>
+        /// <value>The session identifier.</value>
-        public SessionInfo Session { get; }
+        public string SessionId { get; }
+
+        /// <summary>
+        /// Gets the identifier of the user.
+        /// </summary>
+        /// <value>The user identifier.</value>
+        public Guid UserId { get; }
+
+        /// <summary>
+        /// Gets the username.
+        /// </summary>
+        /// <value>The username.</value>
+        public string UserName { get; }
 
         /// <summary>
         /// Gets or sets the ping, in milliseconds.