Fixed issues with TTS voice changes. Added proper handling for slave clients. Fixed several stores. Fixed database saving to safely save foreign keys.

Socket/SocketManager.cs

@@ -6,9 +6,10 @@ namespace HermesSocketServer.Socket
 {
     public class HermesSocketManager
     {
-        private IList<WebSocketUser> _sockets;
-        private System.Timers.Timer _timer;
-        private ILogger _logger;
+        private readonly IList<WebSocketUser> _sockets;
+        private readonly System.Timers.Timer _timer;
+        private readonly ILogger _logger;
+        private readonly object _lock = new object();
 
 
         public HermesSocketManager(ILogger logger)
@@ -18,31 +19,40 @@ namespace HermesSocketServer.Socket
             _timer.Elapsed += async (sender, e) => await HandleHeartbeats(e);
             _timer.Enabled = true;
             _logger = logger;
+            _lock = new object();
         }
 
 
         public void Add(WebSocketUser socket)
         {
-            _sockets.Add(socket);
+            lock (_lock)
+            {
+                _sockets.Add(socket);
+            }
         }
 
         public IList<WebSocketUser> GetAllSockets()
         {
-            return _sockets.AsReadOnly();
+            lock (_lock)
+            {
+                return _sockets.AsReadOnly();
+            }
         }
 
         public IEnumerable<WebSocketUser> GetSockets(string userId)
         {
-            foreach (var socket in _sockets)
+            lock (_lock)
             {
-                if (socket.Id == userId)
-                    yield return socket;
+                return _sockets.Where(s => s.Id == userId);
             }
         }
 
         public bool Remove(WebSocketUser socket)
         {
-            return _sockets.Remove(socket);
+            lock (_lock)
+            {
+                return _sockets.Remove(socket);
+            }
         }
 
         private async Task HandleHeartbeats(ElapsedEventArgs e)