public static async Task<ConnectionStatus> UserConnected(string noticeHubId, string hubId, string peerId, string userId, string connectId, string languages)
 {
     var mbsvc = new UserAppMemberServiceProxy();
     var cntx = Cntx;
     cntx.AcceptLanguages = languages;
     var memb = await mbsvc.LoadEntityGraphRecursAsync(cntx, AppId, userId, null, null);
     if (memb != null)
     {
         memb.StartAutoUpdating = true;
         memb.LastActivityDate = DateTime.UtcNow;
         memb.AcceptLanguages = languages;
         List<MemberCallback> callbacks;
         if (memb.ChangedMemberCallbacks == null)
             callbacks = new List<MemberCallback>();
         else
             callbacks = new List<MemberCallback>(memb.ChangedMemberCallbacks);
         var cbk = (from d in callbacks where d.HubID == hubId && d.ChannelID == peerId select d).SingleOrDefault();
         if (cbk == null)
         {
             cbk = new MemberCallback
             {
                 ApplicationID = AppId,
                 UserID = userId,
                 HubID = hubId,
                 ChannelID = peerId,
                 ConnectionID = connectId,
                 IsDisconnected = false,
                 LastActiveDate = DateTime.UtcNow
             };
         }
         else
         {
             // it is very important to turn this on, otherwise the property will not be marked as modified.
             // and the service will not save the change!
             cbk.StartAutoUpdating = true;
             cbk.ConnectionID = connectId;
             cbk.IsDisconnected = false;
             cbk.LastActiveDate = DateTime.UtcNow;
         }
         memb.ChangedMemberCallbacks = new MemberCallback[] { cbk };
         await mbsvc.AddOrUpdateEntitiesAsync(cntx, new UserAppMemberSet(), new UserAppMember[] { memb });
         UserServiceProxy usvc = new UserServiceProxy();
         var u = await usvc.LoadEntityByKeyAsync(cntx, userId);
         memb.UserRef = u;
         var peerMb = await mbsvc.LoadEntityByKeyAsync(cntx, AppId, peerId);
         ConnectionStatus status = new ConnectionStatus();
         status.me = cbk;
         MemberCallbackServiceProxy mbcsvc = new MemberCallbackServiceProxy();
         UserAssociationServiceProxy uasvc = new UserAssociationServiceProxy();
         var peerCb = await mbcsvc.LoadEntityByKeyAsync(cntx, userId, hubId, AppId, peerId);
         if (peerCb == null || peerCb.ConnectionID == null || peerCb.IsDisconnected)
         {
             UserAssociation utop = await uasvc.LoadEntityByKeyAsync(cntx, userId, peerId, ApplicationContext.ChatAssocTypeId);
             MemberNotificationTypeServiceProxy ntsvc = new MemberNotificationTypeServiceProxy();
             var ntype = await ntsvc.LoadEntityByKeyAsync(cntx, ApplicationContext.PrivateChatNoticeTypeId);
             var notifier = await mbcsvc.LoadEntityByKeyAsync(cntx, "System", noticeHubId, AppId, peerId);
             if (notifier != null && notifier.ConnectionID != null && !notifier.IsDisconnected)
             {
                 if (utop != null && utop.NoMessages != null && utop.NoMessages == true)
                 {
                     status.status = PeerStatus.InBlackList;
                 }
                 else if (utop != null && utop.DoNotNotify != null && utop.DoNotNotify == true)
                 {
                     status.status = PeerStatus.DoNotDisturb;
                 }
                 else if (utop != null && utop.NotifyButBlock != null && utop.NotifyButBlock == true)
                 {
                     status.peerNotifier = notifier;
                     status.status = PeerStatus.NotifyButBlock;
                 }
                 else
                 {
                     status.peerNotifier = notifier;
                     status.status = PeerStatus.Notifiable;
                 }
             }
             else
             {
                 if (utop == null || utop.NoMessages == null || utop.NoMessages == false)
                     status.status = PeerStatus.LeaveMessage;
             }
             MemberNotification n = new MemberNotification 
             {
                 ID = Guid.NewGuid().ToString(),
                 Title = string.Format(ResourceUtils.GetString("20dc5913998d0e9ed01360475e46a0f9", "{0} invites you to chat, is waiting ...", peerMb.AcceptLanguages), ""),
                 CreatedDate = DateTime.UtcNow,
                 PriorityLevel = 0,
                 ReadCount = 0,
                 ApplicationID = AppId,
                 TypeID = ApplicationContext.PrivateChatNoticeTypeId,
                 UserID = peerId
             };
             bool hasIcon = !string.IsNullOrEmpty(memb.IconMime);
             n.NoticeMsg = "{ \"peerId\": \"" + userId + "\", \"peer\": \"" + u.Username + "\", \"connectId\": \"" + connectId + "\", \"hasIcon\": " + (hasIcon ? "true" : "false") + ", \"msg\": \"" + n.Title + "\", \"isCancel\": false, ";
             if (utop != null && utop.NoMessages != null && utop.NoMessages == true)
                 n.NoticeMsg += "\"noMessages\": true, ";
             else
                 n.NoticeMsg += "\"noMessages\": false, ";
             if (utop != null && utop.DoNotNotify != null && utop.DoNotNotify == true)
                 n.NoticeMsg += "\"notDisturb\": true, ";
             else
                 n.NoticeMsg += "\"notDisturb\": false, ";
             if (utop != null && utop.NotifyButBlock != null && utop.NotifyButBlock == true)
                 n.NoticeMsg += "\"keepNotified\": true }";
             else
                 n.NoticeMsg += "\"keepNotified\": false }";
             n.IsNoticeDataLoaded = true;
             MemberNotificationServiceProxy nsvc = new MemberNotificationServiceProxy();
             var r = await nsvc.AddOrUpdateEntitiesAsync(cntx, new MemberNotificationSet(), new MemberNotification[] { n });
             status.noticeType = ntype.TypeName;
             status.noticeMsg = n.NoticeMsg;
             status.noticeRecId = r.ChangedEntities[0].UpdatedItem.ID;
         }
         else
         {
             DateTime dt = DateTime.UtcNow;
             UserAssociation utop = await uasvc.LoadEntityByKeyAsync(cntx, userId, peerId, ApplicationContext.ChatAssocTypeId);
             if (utop == null)
             {
                 utop = new UserAssociation
                 {
                     TypeID = ApplicationContext.ChatAssocTypeId,
                     FromUserID = userId,
                     ToUserID = peerId,
                     CreateDate = dt,
                     AssocCount = 1,
                     LastAssoc = dt,
                     InteractCount = 0,
                     Votes = 0
                 };
             }
             else
                 utop.AssocCount++;
             UserAssociation ptou = await uasvc.LoadEntityByKeyAsync(cntx, peerId, userId, ApplicationContext.ChatAssocTypeId);
             if (ptou == null)
             {
                 ptou = new UserAssociation
                 {
                     TypeID = ApplicationContext.ChatAssocTypeId,
                     FromUserID = peerId,
                     ToUserID = userId,
                     CreateDate = dt,
                     AssocCount = 1,
                     LastAssoc = dt,
                     InteractCount = 0,
                     Votes = 0
                 };
             }
             else
                 ptou.AssocCount++;
             await uasvc.AddOrUpdateEntitiesAsync(cntx, new UserAssociationSet(), new UserAssociation[] { utop, ptou });
             status.status = PeerStatus.Connected;
         }
         if (peerCb != null)
             peerCb.UserAppMemberRef = peerMb;
         status.peer = peerCb;
         return status;
     }
     return null;
 }
 public static async Task<ConnectionStatus> UserCancelInteraction(string noticeHubId, string hubId, string peerId, string userId, string connectId, string languages)
 {
     var cntx = Cntx;
     MemberCallbackServiceProxy mbcsvc = new MemberCallbackServiceProxy();
     ConnectionStatus status = new ConnectionStatus();
     var notifier = await mbcsvc.LoadEntityByKeyAsync(cntx, "System", noticeHubId, AppId, peerId);
     if (notifier != null && notifier.ConnectionID != null && !notifier.IsDisconnected)
     {
         status.peerNotifier = notifier;
         status.status = PeerStatus.Notifiable;
     }
     UserServiceProxy usvc = new UserServiceProxy();
     var u = await usvc.LoadEntityByKeyAsync(cntx, userId);
     var mbsvc = new UserAppMemberServiceProxy();
     var peerMb = await mbsvc.LoadEntityByKeyAsync(cntx, AppId, peerId);
     MemberNotificationTypeServiceProxy ntsvc = new MemberNotificationTypeServiceProxy();
     var ntype = await ntsvc.LoadEntityByKeyAsync(cntx, 3);
     var peerCb = await mbcsvc.LoadEntityByKeyAsync(cntx, userId, hubId, AppId, peerId);
     string title = string.Format(ResourceUtils.GetString("cdc8520b5121c757e6eb79e098d6baef", "{0} cancelled chatting invitation.", peerMb.AcceptLanguages), u.Username);
     if (peerCb == null || peerCb.ConnectionID == null || peerCb.IsDisconnected)
     {
         MemberNotification n = new MemberNotification
         {
             ID = Guid.NewGuid().ToString(),
             Title = title,
             CreatedDate = DateTime.UtcNow,
             PriorityLevel = 0,
             ReadCount = 0,
             ApplicationID = AppId,
             TypeID = 3,
             UserID = peerId
         };
         n.NoticeMsg = "{ \"peerId\": \"" + userId + "\", \"peer\": \"" + u.Username + "\", \"connectId\": \"" + connectId + "\", \"msg\": \"" + title + "\", \"isCancel\": true, \"isDisconnect\": false }";
         n.IsNoticeDataLoaded = true;
         MemberNotificationServiceProxy nsvc = new MemberNotificationServiceProxy();
         var r = await nsvc.AddOrUpdateEntitiesAsync(cntx, new MemberNotificationSet(), new MemberNotification[] { n });
         status.noticeType = ntype.TypeName;
         status.noticeMsg = "{ \"peerId\": \"" + userId + "\", \"peer\": \"" + u.Username + "\", \"connectId\": \"" + connectId + "\", \"msg\": \"" + title + "\", \"isCancel\": true, \"isDisconnect\": false }";
         status.noticeRecId = r.ChangedEntities[0].UpdatedItem.ID;
     }
     else
     {
         status.noticeMsg = "{ \"peerId\": \"" + userId + "\", \"peer\": \"" + u.Username + "\", \"connectId\": \"" + connectId + "\", \"msg\": \"" + title + "\", \"isCancel\": true, \"isDisconnect\": true }";
     }
     status.peer = peerCb;
     return status;
 }