Redid stores. Added user store. Added Channel Manager, to manage data from a single channel.

Models/Channel.cs

@@ -0,0 +1,11 @@
+using HermesSocketServer.Store;
+
+namespace HermesSocketServer.Models
+{
+    public class Channel
+    {
+        public string Id { get; set; }
+        public User User { get; set; }
+        public ChatterStore Chatters { get; set; }
+    }
+}

Models/ChatterVoice.cs

@@ -0,0 +1,9 @@
+namespace HermesSocketServer.Models
+{
+    public class ChatterVoice
+    {
+        public string ChatterId { get; set; }
+        public string UserId { get; set; }
+        public string VoiceId { get; set; }
+    }
+}

Models/User.cs

@@ -0,0 +1,11 @@
+namespace HermesSocketServer.Models
+{
+    public class User
+    {
+        public string Id { get; set; }
+        public string Name { get; set; }
+        public string Email { get; set; }
+        public string Role { get; set; }
+        public string DefaultVoice { get; set; }
+    }
+}

Models/Voice.cs

@@ -0,0 +1,8 @@
+namespace HermesSocketServer.Models
+{
+    public class Voice
+    {
+        public string Id { get; set; }
+        public string Name { get; set; }
+    }
+}

Requests/CreateTTSUser.cs

@@ -1,6 +1,8 @@
 using System.Text.Json;
 using HermesSocketLibrary.db;
 using HermesSocketLibrary.Requests;
+using HermesSocketServer.Models;
+using HermesSocketServer.Services;
 using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
@@ -9,14 +11,16 @@ namespace HermesSocketServer.Requests
     public class CreateTTSUser : IRequest
     {
         public string Name => "create_tts_user";
+        private ChannelManager _channels;
         private Database _database;
-        private ChatterStore _chatters;
+        private readonly ServerConfiguration _configuration;
         private ILogger _logger;
 
-        public CreateTTSUser(ChatterStore chatters, Database database, ILogger logger)
+        public CreateTTSUser(ChannelManager channels, Database database, ServerConfiguration configuration, ILogger logger)
         {
             _database = database;
-            _chatters = chatters;
+            _channels = channels;
+            _configuration = configuration;
             _logger = logger;
         }
 
@@ -41,10 +45,19 @@ namespace HermesSocketServer.Requests
             data["user"] = sender;
 
             var check = await _database.ExecuteScalar("SELECT state FROM \"TtsVoiceState\" WHERE \"userId\" = @user AND \"ttsVoiceId\" = @voice", data) ?? false;
-            if (check is not bool state || !state)
+            if ((check is not bool state || !state) && chatterId != _configuration.Tts.OwnerId)
                 return new RequestResult(false, "Voice is disabled on this channel.");
 
-            _chatters.Set(sender, chatterId, data["voice"].ToString());
+            var channel = _channels.Get(sender);
+            if (channel == null)
+                return new RequestResult(false, null);
+
+            channel.Chatters.Set(chatterId.ToString(), new ChatterVoice()
+            {
+                UserId = sender,
+                ChatterId = chatterId.ToString(),
+                VoiceId = data["voice"].ToString()!
+            });
             _logger.Information($"Selected a tts voice [voice: {data["voice"]}] for user [chatter: {data["chatter"]}] in channel [channel: {data["user"]}]");
             return new RequestResult(true, null);
         }

Requests/CreateTTSVoice.cs

@@ -1,5 +1,6 @@
 using System.Text.Json;
 using HermesSocketLibrary.Requests;
+using HermesSocketServer.Models;
 using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
@@ -8,7 +9,7 @@ namespace HermesSocketServer.Requests
     public class CreateTTSVoice : IRequest
     {
         public string Name => "create_tts_voice";
-        private IStore<string, string> _voices;
+        private IStore<string, Voice> _voices;
         private ILogger _logger;
         private Random _random;
 
@@ -35,7 +36,11 @@ namespace HermesSocketServer.Requests
 
             string id = RandomString(25);
 
-            _voices.Set(id, data["voice"].ToString());
+            _voices.Set(id, new Voice()
+            {
+                Id = id,
+                Name = data["voice"].ToString()!
+            });
             _logger.Information($"Added a new voice [voice: {data["voice"]}][voice id: {id}]");
 
             return new RequestResult(true, id);

Requests/DeleteTTSVoice.cs

@@ -1,5 +1,6 @@
 using System.Text.Json;
 using HermesSocketLibrary.Requests;
+using HermesSocketServer.Models;
 using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
@@ -8,7 +9,7 @@ namespace HermesSocketServer.Requests
     public class DeleteTTSVoice : IRequest
     {
         public string Name => "delete_tts_voice";
-        private IStore<string, string> _voices;
+        private IStore<string, Voice> _voices;
         private ILogger _logger;
 
         public DeleteTTSVoice(VoiceStore voices, ILogger logger)

Requests/GetTTSUsers.cs

@@ -1,5 +1,5 @@
 using HermesSocketLibrary.Requests;
-using HermesSocketServer.Store;
+using HermesSocketServer.Services;
 using ILogger = Serilog.ILogger;
 
 namespace HermesSocketServer.Requests
@@ -7,18 +7,22 @@ namespace HermesSocketServer.Requests
     public class GetTTSUsers : IRequest
     {
         public string Name => "get_tts_users";
-        private ChatterStore _chatters;
+        private ChannelManager _channels;
         private ILogger _logger;
 
-        public GetTTSUsers(ChatterStore chatters, ILogger logger)
+        public GetTTSUsers(ChannelManager channels, ILogger logger)
         {
-            _chatters = chatters;
+            _channels = channels;
             _logger = logger;
         }
 
         public async Task<RequestResult> Grant(string sender, IDictionary<string, object>? data)
         {
-            var temp = _chatters.Get(sender);
+            var channel = _channels.Get(sender);
+            if (channel == null)
+                return new RequestResult(false, null, notifyClientsOnAccount: false);
+            
+            var temp = channel.Chatters.Get().ToDictionary(p => p.Key, p => p.Value.VoiceId);
             _logger.Information($"Fetched all chatters' selected tts voice for channel [channel: {sender}]");
             return new RequestResult(true, temp, notifyClientsOnAccount: false);
         }

Requests/GetTTSVoices.cs

@@ -1,6 +1,7 @@
 using HermesSocketLibrary.db;
 using HermesSocketLibrary.Requests;
 using HermesSocketLibrary.Requests.Messages;
+using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
 namespace HermesSocketServer.Requests
@@ -8,24 +9,23 @@ namespace HermesSocketServer.Requests
     public class GetTTSVoices : IRequest
     {
         public string Name => "get_tts_voices";
-        private Database _database;
+        private VoiceStore _voices;
         private ILogger _logger;
 
-        public GetTTSVoices(Database database, ILogger logger)
+        public GetTTSVoices(VoiceStore voices, ILogger logger)
         {
-            _database = database;
+            _voices = voices;
             _logger = logger;
         }
 
         public async Task<RequestResult> Grant(string sender, IDictionary<string, object>? data)
         {
-            IList<VoiceDetails> voices = new List<VoiceDetails>();
-            string sql = "SELECT id, name FROM \"TtsVoice\"";
-            await _database.Execute(sql, (IDictionary<string, object>?) null, (r) => voices.Add(new VoiceDetails()
+            IEnumerable<VoiceDetails> voices = _voices.Get().Select(v => new VoiceDetails()
             {
-                Id = r.GetString(0),
-                Name = r.GetString(1)
-            }));
+                Id = v.Value.Id,
+                Name = v.Value.Name
+            });
+
             _logger.Information($"Fetched all TTS voices for channel [channel: {sender}]");
             return new RequestResult(true, voices, notifyClientsOnAccount: false);
         }

Requests/UpdateTTSUser.cs

@@ -1,6 +1,9 @@
 using System.Text.Json;
+using System.Threading.Channels;
 using HermesSocketLibrary.db;
 using HermesSocketLibrary.Requests;
+using HermesSocketServer.Models;
+using HermesSocketServer.Services;
 using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
@@ -10,15 +13,15 @@ namespace HermesSocketServer.Requests
     {
         public string Name => "update_tts_user";
 
+        private ChannelManager _channels;
+        private Database _database;
         private readonly ServerConfiguration _configuration;
-        private readonly Database _database;
-        private ChatterStore _chatters;
         private ILogger _logger;
 
-        public UpdateTTSUser(ChatterStore chatters, Database database, ServerConfiguration configuration, ILogger logger)
+        public UpdateTTSUser(ChannelManager channels, Database database, ServerConfiguration configuration, ILogger logger)
         {
             _database = database;
-            _chatters = chatters;
+            _channels = channels;
             _configuration = configuration;
             _logger = logger;
         }
@@ -39,12 +42,19 @@ namespace HermesSocketServer.Requests
             data["user"] = sender;
 
             var check = await _database.ExecuteScalar("SELECT state FROM \"TtsVoiceState\" WHERE \"userId\" = @user AND \"ttsVoiceId\" = @voice", data) ?? false;
-            if ((check is not bool state || !state) && chatterId != _configuration.OwnerId)
-            {
+            if ((check is not bool state || !state) && chatterId != _configuration.Tts.OwnerId)
                 return new RequestResult(false, null);
-            }
 
-            _chatters.Set(sender, chatterId, data["voice"].ToString());
+            var channel = _channels.Get(sender);
+            if (channel == null)
+                return new RequestResult(false, null);
+
+            channel.Chatters.Set(chatterId.ToString(), new ChatterVoice()
+            {
+                UserId = sender,
+                ChatterId = chatterId.ToString(),
+                VoiceId = data["voice"].ToString()!
+            });
             _logger.Information($"Updated chatter's [chatter: {data["chatter"]}] selected tts voice [voice: {data["voice"]}] in channel [channel: {sender}]");
             return new RequestResult(true, null);
         }

Requests/UpdateTTSVoice.cs

@@ -1,5 +1,6 @@
 using System.Text.Json;
 using HermesSocketLibrary.Requests;
+using HermesSocketServer.Models;
 using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
@@ -8,7 +9,7 @@ namespace HermesSocketServer.Requests
     public class UpdateTTSVoice : IRequest
     {
         public string Name => "update_tts_voice";
-        private IStore<string, string> _voices;
+        private IStore<string, Voice> _voices;
         private ILogger _logger;
 
         public UpdateTTSVoice(VoiceStore voices, ILogger logger)
@@ -30,7 +31,11 @@ namespace HermesSocketServer.Requests
             if (data["voiceid"] is JsonElement id)
                 data["voiceid"] = id.ToString();
 
-            _voices.Set(data["voiceid"].ToString(), data["voice"].ToString());
+            _voices.Set(data["voiceid"].ToString(), new Voice()
+            {
+                Id = data["voiceid"].ToString()!,
+                Name = data["voice"].ToString()!
+            });
             _logger.Information($"Updated voice's [voice id: {data["voiceid"]}] name [new name: {data["voice"]}]");
             return new RequestResult(true, null);
         }

ServerConfiguration.cs

@@ -5,7 +5,7 @@ namespace HermesSocketServer
         public string Environment;
         public WebsocketServerConfiguration WebsocketServer;
         public DatabaseConfiguration Database;
-        public long OwnerId;
+        public TTSConfiguration Tts;
         public string AdminPassword;
     }
 
@@ -20,4 +20,10 @@ namespace HermesSocketServer
         public string ConnectionString;
         public int SaveDelayInSeconds;
     }
+
+    public class TTSConfiguration
+    {
+        public long OwnerId;
+        public string DefaultTtsVoice;
+    }
 }

Services/ChannelManager.cs

@@ -0,0 +1,56 @@
+using System.Collections.Concurrent;
+using HermesSocketLibrary.db;
+using HermesSocketServer.Models;
+using HermesSocketServer.Store;
+
+namespace HermesSocketServer.Services
+{
+    public class ChannelManager
+    {
+        private readonly UserStore _users;
+        private readonly Database _database;
+        private readonly Serilog.ILogger _logger;
+        private readonly IDictionary<string, Channel> _channels;
+
+        public ChannelManager(UserStore users, Database database, Serilog.ILogger logger)
+        {
+            _users = users;
+            _database = database;
+            _logger = logger;
+            _channels = new ConcurrentDictionary<string, Channel>();
+        }
+
+
+        public async Task Add(string userId)
+        {
+            var user = _users.Get(userId);
+            if (user == null)
+            {
+                return;
+            }
+            if (_channels.ContainsKey(userId))
+            {
+                return;
+            }
+
+            var chatters = new ChatterStore(userId, _database, _logger);
+            await chatters.Load();
+
+            var channel = new Channel()
+            {
+                Id = userId,
+                User = user,
+                Chatters = chatters
+            };
+
+            _channels.Add(userId, channel);
+        }
+
+        public Channel? Get(string channelId)
+        {
+            if (_channels.TryGetValue(channelId, out var channel))
+                return channel;
+            return null;
+        }
+    }
+}

Services/DatabaseService.cs

@@ -5,13 +5,14 @@ namespace HermesSocketServer.Services
     public class DatabaseService : BackgroundService
     {
         private readonly VoiceStore _voices;
-        private readonly ChatterStore _chatters;
+        private readonly UserStore _users;
         private readonly ServerConfiguration _configuration;
         private readonly Serilog.ILogger _logger;
 
-        public DatabaseService(VoiceStore voices, ChatterStore chatters, ServerConfiguration configuration, Serilog.ILogger logger) {
+        public DatabaseService(VoiceStore voices, UserStore users, ServerConfiguration configuration, Serilog.ILogger logger)
+        {
             _voices = voices;
-            _chatters = chatters;
+            _users = users;
             _configuration = configuration;
             _logger = logger;
         }
@@ -20,16 +21,19 @@ namespace HermesSocketServer.Services
         {
             _logger.Information("Loading TTS voices...");
             await _voices.Load();
-            _logger.Information("Loading TTS chatters' voice.");
-            await _chatters.Load();
+            _logger.Information("Loading users...");
+            await _users.Load();
 
             await Task.Run(async () =>
             {
+                var tasks = new List<Task>();
+                await Task.Delay(TimeSpan.FromSeconds(_configuration.Database.SaveDelayInSeconds));
                 while (true)
                 {
-                    await Task.Delay(TimeSpan.FromSeconds(_configuration.Database.SaveDelayInSeconds));
-                    await _voices.Save();
-                    await _chatters.Save();
+                    tasks.Add(_voices.Save());
+                    tasks.Add(_users.Save());
+                    tasks.Add(Task.Delay(TimeSpan.FromSeconds(_configuration.Database.SaveDelayInSeconds)));
+                    await Task.WhenAll(tasks);
                 }
             });
         }

Socket/Handlers/HermesLoginHandler.cs

@@ -1,6 +1,8 @@
 using HermesSocketLibrary.db;
 using HermesSocketLibrary.Requests.Messages;
 using HermesSocketLibrary.Socket.Data;
+using HermesSocketServer.Services;
+using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
 namespace HermesSocketServer.Socket.Handlers
@@ -9,14 +11,18 @@ namespace HermesSocketServer.Socket.Handlers
     {
         public int OperationCode { get; } = 1;
 
+        private readonly ChannelManager _manager;
+        private readonly VoiceStore _voices;
         private readonly ServerConfiguration _configuration;
         private readonly Database _database;
         private readonly HermesSocketManager _sockets;
         private readonly ILogger _logger;
         private readonly object _lock;
 
-        public HermesLoginHandler(ServerConfiguration configuration, Database database, HermesSocketManager sockets, ILogger logger)
+        public HermesLoginHandler(ChannelManager manager, VoiceStore voices, ServerConfiguration configuration, Database database, HermesSocketManager sockets, ILogger logger)
         {
+            _manager = manager;
+            _voices = voices;
             _configuration = configuration;
             _database = database;
             _sockets = sockets;
@@ -49,30 +55,31 @@ namespace HermesSocketServer.Socket.Handlers
                 sender.WebLogin = data.WebLogin;
             }
 
-            var userIdDict = new Dictionary<string, object>() { { "user", userId } };
-            string? ttsDefaultVoice = null;
-            string sql2 = "select name, role, \"ttsDefaultVoice\" from \"User\" where id = @user";
-            await _database.Execute(sql2, userIdDict, sql =>
-            {
-                sender.Name = sql.GetString(0);
-                sender.Admin = sql.GetString(1) == "ADMIN";
-                ttsDefaultVoice = sql.GetString(2);
-            });
+            await _manager.Add(userId);
+            var channel = _manager.Get(userId);
+            if (channel == null)
+                return;
+            
+            sender.Name = channel.User.Name;
+            sender.Admin = channel.User.Role == "ADMIN";
 
             if (string.IsNullOrEmpty(sender.Name))
             {
-                _logger.Error($"Could not find username using the user id [user id: {userId}][api key: {data.ApiKey}]");
+                _logger.Error($"Could not find username for a certain user [user id: {userId}][api key: {data.ApiKey}]");
                 return;
             }
+            if (string.IsNullOrEmpty(channel.User.DefaultVoice))
+                _logger.Warning($"No default voice was set for an user [user id: {userId}][api key: {data.ApiKey}]");
 
             var ack = new LoginAckMessage()
             {
                 UserId = userId,
-                OwnerId = _configuration.OwnerId,
+                OwnerId = _configuration.Tts.OwnerId,
                 Admin = sender.Admin,
                 WebLogin = data.WebLogin,
             };
 
+            var userIdDict = new Dictionary<string, object>() { { "user", userId } };
             ack.Connections = new List<Connection>();
             string sql3 = "select \"name\", \"type\", \"clientId\", \"accessToken\", \"grantType\", \"scope\", \"expiresAt\", \"default\" from \"Connection\" where \"userId\" = @user";
             await _database.Execute(sql3, userIdDict, sql =>
@@ -89,9 +96,7 @@ namespace HermesSocketServer.Socket.Handlers
                 })
             );
 
-            ack.TTSVoicesAvailable = new Dictionary<string, string>();
-            string sql4 = "SELECT id, name FROM \"TtsVoice\"";
-            await _database.Execute(sql4, (IDictionary<string, object>?) null, (r) => ack.TTSVoicesAvailable.Add(r.GetString(0), r.GetString(1)));
+            ack.TTSVoicesAvailable = _voices.Get().ToDictionary(v => v.Key, v => v.Value.Name);
 
             ack.EnabledTTSVoices = new List<string>();
             string sql5 = $"SELECT v.name FROM \"TtsVoiceState\" s "
@@ -108,8 +113,7 @@ namespace HermesSocketServer.Socket.Handlers
                 Replace = r.GetString(2)
             }));
 
-            if (ttsDefaultVoice != null)
-                ack.DefaultTTSVoice = ttsDefaultVoice;
+            ack.DefaultTTSVoice = channel.User.DefaultVoice ?? _configuration.Tts.DefaultTtsVoice;
 
             await sender.Send(2, ack);
 
@@ -120,7 +124,7 @@ namespace HermesSocketServer.Socket.Handlers
             {
                 AnotherClient = true,
                 UserId = userId,
-                OwnerId = _configuration.OwnerId,
+                OwnerId = _configuration.Tts.OwnerId,
                 WebLogin = data.WebLogin
             };
 

Startup.cs

@@ -81,7 +81,7 @@ s.AddSingleton<VoiceNameValidator>();
 
 // Stores
 s.AddSingleton<VoiceStore>();
-s.AddSingleton<ChatterStore>();
+s.AddSingleton<UserStore>();
 
 // Request handlers
 s.AddSingleton<IRequest, GetTTSUsers>();
@@ -103,6 +103,8 @@ s.AddSingleton<IRequest, GetRedeemableActions>();
 s.AddSingleton<IRequest, UpdateTTSVoiceState>();
 s.AddSingleton<IRequest, UpdateDefaultTTSVoice>();
 
+// Managers
+s.AddSingleton<ChannelManager>();
 s.AddSingleton<HermesSocketManager>();
 s.AddSingleton<SocketHandlerManager>();
 s.AddSingleton<IRequestManager, RequestManager>();
@@ -113,7 +115,7 @@ s.AddSingleton(new JsonSerializerOptions()
 });
 s.AddSingleton<Server>();
 
-
+// Background services
 s.AddHostedService<DatabaseService>();
 
 var app = builder.Build();

Store/ChatterStore.cs

@@ -1,282 +1,99 @@
-using System.Collections.Immutable;
-using System.Text;
 using HermesSocketLibrary.db;
+using HermesSocketServer.Models;
 
 namespace HermesSocketServer.Store
 {
-    public class ChatterStore : IStore<string, long, string>
+    public class ChatterStore : GroupSaveStore<string, ChatterVoice>
     {
+        private readonly string _userId;
         private readonly Database _database;
         private readonly Serilog.ILogger _logger;
-        private readonly IDictionary<string, IDictionary<long, string>> _chatters;
-        private readonly IDictionary<string, IList<long>> _added;
-        private readonly IDictionary<string, IList<long>> _modified;
-        private readonly IDictionary<string, IList<long>> _deleted;
-        private readonly object _lock;
+        private readonly GroupSaveSqlGenerator<ChatterVoice> _generator;
 
 
-        public ChatterStore(Database database, Serilog.ILogger logger)
+        public ChatterStore(string userId, Database database, Serilog.ILogger logger) : base(logger)
         {
+            _userId = userId;
             _database = database;
             _logger = logger;
-            _chatters = new Dictionary<string, IDictionary<long, string>>();
-            _added = new Dictionary<string, IList<long>>();
-            _modified = new Dictionary<string, IList<long>>();
-            _deleted = new Dictionary<string, IList<long>>();
-            _lock = new object();
-        }
 
-        public string? Get(string user, long key)
-        {
-            if (!_chatters.TryGetValue(user, out var broadcaster))
-                return null;
-            if (broadcaster.TryGetValue(key, out var chatter))
-                return chatter;
-            return null;
-        }
-
-        public IEnumerable<string> Get()
-        {
-            return _chatters.Select(c => c.Value).SelectMany(c => c.Values).ToImmutableList();
-        }
-
-        public IDictionary<long, string> Get(string user)
-        {
-            if (_chatters.TryGetValue(user, out var chatters))
-                return chatters.ToImmutableDictionary();
-            return new Dictionary<long, string>();
-        }
-
-        public async Task Load()
-        {
-            string sql = "SELECT \"chatterId\", \"ttsVoiceId\", \"userId\" FROM \"TtsChatVoice\";";
-            await _database.Execute(sql, new Dictionary<string, object>(), (reader) =>
+            var ctp = new Dictionary<string, string>
             {
-                var chatterId = reader.GetInt64(0);
-                var ttsVoiceId = reader.GetString(1);
-                var userId = reader.GetString(2);
-                if (!_chatters.TryGetValue(userId, out var chatters))
+                { "chatterId", "ChatterId" },
+                { "ttsVoiceId", "VoiceId" },
+                { "userId", "UserId" },
+            };
+            _generator = new GroupSaveSqlGenerator<ChatterVoice>(ctp);
+        }
+
+        public override async Task Load()
+        {
+            var data = new Dictionary<string, object>() { { "user", _userId } };
+            string sql = $"SELECT \"chatterId\", \"ttsVoiceId\" FROM \"TtsChatVoice\" WHERE \"userId\" = @user";
+            await _database.Execute(sql, data, (reader) =>
+            {
+                string chatterId = reader.GetInt64(0).ToString();
+                _store.Add(chatterId, new ChatterVoice()
                 {
-                    chatters = new Dictionary<long, string>();
-                    _chatters.Add(userId, chatters);
-                }
-                chatters.Add(chatterId, ttsVoiceId);
+                    UserId = _userId,
+                    ChatterId = chatterId,
+                    VoiceId = reader.GetString(1)
+                });
             });
-            _logger.Information($"Loaded {_chatters.Count} TTS voices from database.");
+            _logger.Information($"Loaded {_store.Count} TTS chatter voices from database.");
         }
 
-        public void Remove(string user, long? key)
+        public override void OnInitialAdd(string key, ChatterVoice value)
         {
-            if (key == null)
-                return;
-
-            lock (_lock)
-            {
-                if (_chatters.TryGetValue(user, out var chatters) && chatters.Remove(key.Value))
-                {
-                    if (!_added.TryGetValue(user, out var added) || !added.Remove(key.Value))
-                    {
-                        if (_modified.TryGetValue(user, out var modified))
-                            modified.Remove(key.Value);
-                        if (!_deleted.TryGetValue(user, out var deleted))
-                        {
-                            deleted = new List<long>();
-                            _deleted.Add(user, deleted);
-                            deleted.Add(key.Value);
-                        }
-                        else if (!deleted.Contains(key.Value))
-                            deleted.Add(key.Value);
-                    }
-                }
-            }
         }
 
-        public void Remove(string? leftKey, long rightKey)
+        public override void OnInitialModify(string key, ChatterVoice value)
         {
-            throw new NotImplementedException();
         }
 
-        public async Task<bool> Save()
+        public override void OnInitialRemove(string key)
         {
-            var changes = false;
-            var sb = new StringBuilder();
-            var sql = "";
+        }
+
+        public override async Task<bool> Save()
+        {
+            int count = 0;
+            string sql = string.Empty;
 
             if (_added.Any())
             {
-                int count = _added.Count;
-                sb.Append("INSERT INTO \"TtsChatVoice\" (\"chatterId\", \"ttsVoiceId\", \"userId\") VALUES ");
                 lock (_lock)
                 {
-                    foreach (var broadcaster in _added)
-                    {
-                        var userId = broadcaster.Key;
-                        var user = _chatters[userId];
-                        foreach (var chatterId in broadcaster.Value)
-                        {
-                            var voiceId = user[chatterId];
-                            sb.Append("(")
-                                .Append(chatterId)
-                                .Append(",'")
-                                .Append(voiceId)
-                                .Append("','")
-                                .Append(userId)
-                                .Append("'),");
-                        }
-                    }
-                    sb.Remove(sb.Length - 1, 1)
-                        .Append(';');
-
-                    sql = sb.ToString();
-                    sb.Clear();
+                    count = _added.Count;
+                    sql = _generator.GenerateInsertSql("TtsChatVoice", _added.Select(a => _store[a]), ["userId", "chatterId", "ttsVoiceId"]);
                     _added.Clear();
                 }
 
-                try
-                {
-                    _logger.Debug($"About to save {count} voices to database.");
-                    await _database.ExecuteScalar(sql);
-                }
-                catch (Exception ex)
-                {
-                    _logger.Error(ex, "Failed to save TTS voices on database: " + sql);
-                }
-                changes = true;
+                _logger.Debug($"ADD {count} " + sql);
+                await _database.ExecuteScalar(sql);
             }
-
             if (_modified.Any())
             {
-                int count = _modified.Count;
-                sb.Append("UPDATE \"TtsChatVoice\" as t SET \"ttsVoiceId\" = c.\"ttsVoiceId\" FROM (VALUES ");
                 lock (_lock)
                 {
-                    foreach (var broadcaster in _modified)
-                    {
-                        var userId = broadcaster.Key;
-                        var user = _chatters[userId];
-                        foreach (var chatterId in broadcaster.Value)
-                        {
-                            var voiceId = user[chatterId];
-                            sb.Append("(")
-                                .Append(chatterId)
-                                .Append(",'")
-                                .Append(voiceId)
-                                .Append("','")
-                                .Append(userId)
-                                .Append("'),");
-                        }
-                    }
-                    sb.Remove(sb.Length - 1, 1)
-                        .Append(") AS c(\"chatterId\", \"ttsVoiceId\", \"userId\") WHERE \"userId\" = c.\"userId\" AND \"chatterId\" = c.\"chatterId\";");
-
-                    sql = sb.ToString();
-                    sb.Clear();
+                    count = _modified.Count;
+                    sql = _generator.GenerateUpdateSql("TtsChatVoice", _modified.Select(m => _store[m]), ["userId", "chatterId"], ["ttsVoiceId"]);
                     _modified.Clear();
                 }
-
-                try
-                {
-                    _logger.Debug($"About to update {count} voices on the database.");
-                    await _database.ExecuteScalar(sql);
-                }
-                catch (Exception ex)
-                {
-                    _logger.Error(ex, "Failed to modify TTS voices on database: " + sql);
-                }
-                changes = true;
+                _logger.Debug($"MOD {count} " + sql);
+                await _database.ExecuteScalar(sql);
             }
-
             if (_deleted.Any())
             {
-                int count = _deleted.Count;
-                sb.Append("DELETE FROM \"TtsChatVoice\" WHERE (\"chatterId\", \"userId\") IN (");
                 lock (_lock)
                 {
-                    foreach (var broadcaster in _deleted)
-                    {
-                        var userId = broadcaster.Key;
-                        var user = _chatters[userId];
-                        foreach (var chatterId in broadcaster.Value)
-                        {
-                            sb.Append("(")
-                                .Append(chatterId)
-                                .Append(",'")
-                                .Append(userId)
-                                .Append("'),");
-                        }
-                    }
-                    sb.Remove(sb.Length - 1, 1)
-                        .Append(");");
-
-                    sql = sb.ToString();
-                    sb.Clear();
+                    count = _deleted.Count;
+                    sql = _generator.GenerateDeleteSql("TtsChatVoice", _deleted, ["userId", "chatterId"]);
                     _deleted.Clear();
                 }
-
-                try
-                {
-                    _logger.Debug($"About to delete {count} voices from the database.");
-                    await _database.ExecuteScalar(sql);
-                }
-                catch (Exception ex)
-                {
-                    _logger.Error(ex, "Failed to modify TTS voices on database: " + sql);
-                }
-                changes = true;
+                _logger.Debug($"DEL {count} " + sql);
+                await _database.ExecuteScalar(sql);
             }
-            return changes;
-        }
-
-        public bool Set(string? user, long key, string? value)
-        {
-            if (user == null || value == null)
-                return false;
-
-            lock (_lock)
-            {
-                if (!_chatters.TryGetValue(user, out var broadcaster))
-                {
-                    broadcaster = new Dictionary<long, string>();
-                    _chatters.Add(user, broadcaster);
-                }
-
-                if (broadcaster.TryGetValue(key, out var chatter))
-                {
-                    if (chatter != value)
-                    {
-                        broadcaster[key] = value;
-                        if (!_added.TryGetValue(user, out var added) || !added.Contains(key))
-                        {
-                            if (!_modified.TryGetValue(user, out var modified))
-                            {
-                                modified = new List<long>();
-                                _modified.Add(user, modified);
-                                modified.Add(key);
-                            }
-                            else if (!modified.Contains(key))
-                                modified.Add(key);
-                        }
-                    }
-                }
-                else
-                {
-                    broadcaster.Add(key, value);
-                    _added.TryAdd(user, new List<long>());
-
-                    if (!_deleted.TryGetValue(user, out var deleted) || !deleted.Remove(key))
-                    {
-                        if (!_added.TryGetValue(user, out var added))
-                        {
-                            added = new List<long>();
-                            _added.Add(user, added);
-                            added.Add(key);
-                        }
-                        else if (!added.Contains(key))
-                            added.Add(key);
-                    }
-                }
-            }
-
             return true;
         }
     }

Store/GroupSaveSqlGenerator.cs

@@ -0,0 +1,138 @@
+using System.Reflection;
+using System.Text;
+
+namespace HermesSocketServer.Store
+{
+    public class GroupSaveSqlGenerator<T>
+    {
+        private readonly IDictionary<string, PropertyInfo?> columnPropertyRelations;
+
+        public GroupSaveSqlGenerator(IDictionary<string, string> columnsToProperties)
+        {
+            columnPropertyRelations = columnsToProperties.ToDictionary(p => p.Key, p => typeof(T).GetProperty(p.Value));
+
+            var nullProperties = columnPropertyRelations.Where(p => p.Value == null)
+                .Select(p => columnsToProperties[p.Key]);
+            if (nullProperties.Any())
+                throw new ArgumentException("Some properties do not exist on the values given: " + string.Join(", ", nullProperties));
+        }
+
+        public string GenerateInsertSql(string table, IEnumerable<T> values, IEnumerable<string> columns)
+        {
+            if (string.IsNullOrWhiteSpace(table))
+                throw new ArgumentException("Value is either null or whitespace-filled.", nameof(table));
+            if (values == null)
+                throw new ArgumentNullException(nameof(values));
+            if (!values.Any())
+                throw new ArgumentException("Empty list given.", nameof(values));
+            if (columns == null)
+                throw new ArgumentNullException(nameof(columns));
+            if (!columns.Any())
+                throw new ArgumentException("Empty list given.", nameof(columns));
+
+            var ctp = columns.ToDictionary(c => c, c => columnPropertyRelations[c]);
+            var sb = new StringBuilder();
+            sb.Append($"INSERT INTO \"{table}\" (\"{string.Join("\", \"", columns)}\") VALUES ");
+            foreach (var value in values)
+            {
+                sb.Append("(");
+                foreach (var column in columns)
+                {
+                    var propValue = columnPropertyRelations[column]!.GetValue(value);
+                    var propType = columnPropertyRelations[column]!.PropertyType;
+                    WriteValue(sb, propValue, propType);
+                    sb.Append(",");
+                }
+                sb.Remove(sb.Length - 1, 1)
+                .Append("),");
+            }
+            sb.Remove(sb.Length - 1, 1)
+                .Append(';');
+            return sb.ToString();
+        }
+
+        public string GenerateUpdateSql(string table, IEnumerable<T> values, IEnumerable<string> keyColumns, IEnumerable<string> updateColumns)
+        {
+            if (string.IsNullOrWhiteSpace(table))
+                throw new ArgumentException("Value is either null or whitespace-filled.", nameof(table));
+            if (values == null)
+                throw new ArgumentNullException(nameof(values));
+            if (!values.Any())
+                throw new ArgumentException("Empty list given.", nameof(values));
+            if (keyColumns == null)
+                throw new ArgumentNullException(nameof(keyColumns));
+            if (!keyColumns.Any())
+                throw new ArgumentException("Empty list given.", nameof(keyColumns));
+            if (updateColumns == null)
+                throw new ArgumentNullException(nameof(updateColumns));
+            if (!updateColumns.Any())
+                throw new ArgumentException("Empty list given.", nameof(updateColumns));
+
+            var columns = keyColumns.Union(updateColumns);
+            var ctp = columns.ToDictionary(c => c, c => columnPropertyRelations[c]);
+            var sb = new StringBuilder();
+            sb.Append($"UPDATE \"{table}\" as t SET {string.Join(", ", updateColumns.Select(c => "\"" + c + "\" = c.\"" + c + "\""))} FROM (VALUES ");
+            foreach (var value in values)
+            {
+                sb.Append("(");
+                foreach (var column in columns)
+                {
+                    var propValue = columnPropertyRelations[column]!.GetValue(value);
+                    var propType = columnPropertyRelations[column]!.PropertyType;
+                    WriteValue(sb, propValue, propType);
+                    sb.Append(",");
+                }
+                sb.Remove(sb.Length - 1, 1)
+                    .Append("),");
+            }
+            sb.Remove(sb.Length - 1, 1)
+                .Append($") AS c(\"{string.Join("\", \"", columns)}\") WHERE id = c.id;");
+
+            return sb.ToString();
+        }
+
+        public string GenerateDeleteSql(string table, IEnumerable<string> keys, IEnumerable<string> keyColumns)
+        {
+            if (string.IsNullOrWhiteSpace(table))
+                throw new ArgumentException("Value is either null or whitespace-filled.", nameof(table));
+            if (keys == null)
+                throw new ArgumentNullException(nameof(keys));
+            if (!keys.Any())
+                throw new ArgumentException("Empty list given.", nameof(keys));
+            if (keyColumns == null)
+                throw new ArgumentNullException(nameof(keyColumns));
+            if (!keyColumns.Any())
+                throw new ArgumentException("Empty list given.", nameof(keyColumns));
+
+            var ctp = keyColumns.ToDictionary(c => c, c => columnPropertyRelations[c]);
+            var sb = new StringBuilder();
+            sb.Append($"DELETE FROM \"{table}\" WHERE (\"{string.Join("\", \"", keyColumns)}\") IN (");
+            foreach (var k in keys)
+            {
+                sb.Append("(");
+                foreach (var column in keyColumns)
+                {
+                    var propType = columnPropertyRelations[column]!.PropertyType;
+                    WriteValue(sb, k, propType);
+                    sb.Append(",");
+                }
+                sb.Remove(sb.Length - 1, 1)
+                    .Append("),");
+            }
+            sb.Remove(sb.Length - 1, 1)
+                .Append(");");
+
+            return sb.ToString();
+        }
+
+        private void WriteValue(StringBuilder sb, object? value, Type type)
+        {
+            if (type == typeof(string))
+                sb.Append("'")
+                    .Append(value)
+                    .Append("'");
+            else
+                sb.Append(value);
+        }
+    }
+}

Store/GroupedSaveStore.cs

@@ -0,0 +1,112 @@
+
+
+using System.Collections.Immutable;
+
+namespace HermesSocketServer.Store
+{
+    public abstract class GroupSaveStore<K, V> : IStore<K, V> where K : class where V : class
+    {
+        private readonly Serilog.ILogger _logger;
+        protected readonly IDictionary<K, V> _store;
+        protected readonly IList<K> _added;
+        protected readonly IList<K> _modified;
+        protected readonly IList<K> _deleted;
+        protected readonly object _lock;
+
+
+        public GroupSaveStore(Serilog.ILogger logger)
+        {
+            _logger = logger;
+            _store = new Dictionary<K, V>();
+            _added = new List<K>();
+            _modified = new List<K>();
+            _deleted = new List<K>();
+            _lock = new object();
+        }
+
+        public abstract Task Load();
+        public abstract void OnInitialAdd(K key, V value);
+        public abstract void OnInitialModify(K key, V value);
+        public abstract void OnInitialRemove(K key);
+        public abstract Task<bool> Save();
+
+        public V? Get(K key)
+        {
+            lock (_lock)
+            {
+                if (_store.TryGetValue(key, out var value))
+                    return value;
+            }
+            return null;
+        }
+
+        public IDictionary<K, V> Get()
+        {
+            lock (_lock)
+            {
+                return _store.ToImmutableDictionary();
+            }
+        }
+
+        public void Remove(K? key)
+        {
+            if (key == null)
+                return;
+
+            lock (_lock)
+            {
+                if (_store.Remove(key))
+                {
+                    _logger.Information($"removed key from _deleted {key}");
+                    OnInitialRemove(key);
+                    if (!_added.Remove(key))
+                    {
+                        _modified.Remove(key);
+                        _logger.Information($"removed key from _added & _modified {key}");
+                        if (!_deleted.Contains(key))
+                        {
+                            _deleted.Add(key);
+                            _logger.Information($"added key to _deleted {key}");
+                        }
+                    }
+                }
+            }
+        }
+
+        public bool Set(K? key, V? value)
+        {
+            if (key == null || value == null)
+                return false;
+
+            lock (_lock)
+            {
+                if (_store.TryGetValue(key, out V? fetched))
+                {
+                    if (fetched != value)
+                    {
+                        OnInitialModify(key, value);
+                        _store[key] = value;
+                        if (!_added.Contains(key) && !_modified.Contains(key))
+                        {
+                            _modified.Add(key);
+                            _logger.Information($"added key to _modified {key}");
+                        }
+                        return true;
+                    }
+                }
+                else
+                {
+                    OnInitialAdd(key, value);
+                    _store.Add(key, value);
+                    if (!_deleted.Remove(key) && !_added.Contains(key))
+                    {
+                        _added.Add(key);
+                        _logger.Information($"added key to _added {key}");
+                    }
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+}

Store/IStore.cs

@@ -9,14 +9,4 @@ namespace HermesSocketServer.Store
         Task<bool> Save();
         bool Set(K? key, V? value);
     }
-
-    public interface IStore<L, R, V>
-    {
-        V? Get(L leftKey, R rightKey);
-        IDictionary<R, V> Get(L leftKey);
-        Task Load();
-        void Remove(L? leftKey, R? rightKey);
-        Task<bool> Save();
-        bool Set(L? leftKey, R? rightKey, V? value);
-    }
 }

Store/UserStore.cs

@@ -0,0 +1,94 @@
+using HermesSocketLibrary.db;
+using HermesSocketServer.Models;
+
+namespace HermesSocketServer.Store
+{
+    public class UserStore : GroupSaveStore<string, User>
+    {
+        private readonly Database _database;
+        private readonly Serilog.ILogger _logger;
+        private readonly GroupSaveSqlGenerator<User> _generator;
+
+
+        public UserStore(Database database, Serilog.ILogger logger) : base(logger)
+        {
+            _database = database;
+            _logger = logger;
+
+            var ctp = new Dictionary<string, string>
+            {
+                { "id", "Id" },
+                { "name", "Name" },
+                { "email", "Email" },
+                { "role", "Role" },
+                { "ttsDefaultVoice", "DefaultVoice" }
+            };
+            _generator = new GroupSaveSqlGenerator<User>(ctp);
+        }
+
+        public override async Task Load()
+        {
+            string sql = "SELECT id, name, email, role, \"ttsDefaultVoice\" FROM \"User\";";
+            await _database.Execute(sql, new Dictionary<string, object>(), (reader) =>
+            {
+                string id = reader.GetString(0);
+                _store.Add(id, new User()
+                {
+                    Id = id,
+                    Name = reader.GetString(1),
+                    Email = reader.GetString(2),
+                    Role = reader.GetString(3),
+                    DefaultVoice = reader.GetString(4),
+                });
+            });
+            _logger.Information($"Loaded {_store.Count} users from database.");
+        }
+
+        public override void OnInitialAdd(string key, User value)
+        {
+        }
+
+        public override void OnInitialModify(string key, User value)
+        {
+        }
+
+        public override void OnInitialRemove(string key)
+        {
+        }
+
+        public override async Task<bool> Save()
+        {
+            if (_added.Any())
+            {
+                string sql = string.Empty;
+                lock (_lock)
+                {
+                    sql = _generator.GenerateInsertSql("User", _added.Select(a => _store[a]), ["id", "name", "email", "role", "ttsDefaultVoice"]);
+                    _added.Clear();
+                }
+                await _database.ExecuteScalar(sql);
+            }
+            if (_modified.Any())
+            {
+                string sql = string.Empty;
+                lock (_lock)
+                {
+                    sql = _generator.GenerateUpdateSql("User", _modified.Select(m => _store[m]), ["id"], ["name", "email", "role", "ttsDefaultVoice"]);
+                    _modified.Clear();
+                }
+                await _database.ExecuteScalar(sql);
+            }
+            if (_deleted.Any())
+            {
+                string sql = string.Empty;
+                lock (_lock)
+                {
+                    sql = _generator.GenerateDeleteSql("User", _deleted, ["id"]);
+                    _deleted.Clear();
+                }
+                await _database.ExecuteScalar(sql);
+            }
+            return true;
+        }
+    }
+}

Store/VoiceStore.cs

@@ -1,223 +1,102 @@
-using System.Collections.Immutable;
-using System.Text;
 using HermesSocketLibrary.db;
+using HermesSocketServer.Models;
 using HermesSocketServer.Validators;
 
 namespace HermesSocketServer.Store
 {
-    public class VoiceStore : IStore<string, string>
+    public class VoiceStore : GroupSaveStore<string, Voice>
     {
+        private readonly VoiceIdValidator _idValidator;
+        private readonly VoiceNameValidator _nameValidator;
         private readonly Database _database;
-        private readonly IValidator _voiceIdValidator;
-        private readonly IValidator _voiceNameValidator;
         private readonly Serilog.ILogger _logger;
-        private readonly IDictionary<string, string> _voices;
-        private readonly IList<string> _added;
-        private readonly IList<string> _modified;
-        private readonly IList<string> _deleted;
-        private readonly object _lock;
-
-        public DateTime PreviousSave;
+        private readonly GroupSaveSqlGenerator<Voice> _generator;
 
 
-        public VoiceStore(Database database, VoiceIdValidator voiceIdValidator, VoiceNameValidator voiceNameValidator, Serilog.ILogger logger)
+        public VoiceStore(VoiceIdValidator voiceIdValidator, VoiceNameValidator voiceNameValidator, Database database, Serilog.ILogger logger) : base(logger)
         {
+            _idValidator = voiceIdValidator;
+            _nameValidator = voiceNameValidator;
             _database = database;
-            _voiceIdValidator = voiceIdValidator;
-            _voiceNameValidator = voiceNameValidator;
             _logger = logger;
-            _voices = new Dictionary<string, string>();
-            _added = new List<string>();
-            _modified = new List<string>();
-            _deleted = new List<string>();
-            _lock = new object();
 
-            PreviousSave = DateTime.UtcNow;
+            var ctp = new Dictionary<string, string>
+            {
+                { "id", "Id" },
+                { "name", "Name" }
+            };
+            _generator = new GroupSaveSqlGenerator<Voice>(ctp);
         }
 
-        public string? Get(string key)
-        {
-            if (_voices.TryGetValue(key, out var voice))
-                return voice;
-            return null;
-        }
-
-        public IDictionary<string, string> Get()
-        {
-            return _voices.ToImmutableDictionary();
-        }
-
-        public async Task Load()
+        public override async Task Load()
         {
             string sql = "SELECT id, name FROM \"TtsVoice\";";
             await _database.Execute(sql, new Dictionary<string, object>(), (reader) =>
             {
-                var id = reader.GetString(0);
-                var name = reader.GetString(1);
-                _voices.Add(id, name);
-            });
-            _logger.Information($"Loaded {_voices.Count} TTS voices from database.");
-        }
-
-        public void Remove(string? key)
-        {
-            if (key == null)
-                return;
-
-            lock (_lock)
-            {
-                if (_voices.ContainsKey(key))
+                string id = reader.GetString(0);
+                _store.Add(id, new Voice()
                 {
-                    _voices.Remove(key);
-                    if (!_added.Remove(key))
-                    {
-                        _modified.Remove(key);
-                        if (!_deleted.Contains(key))
-                            _deleted.Add(key);
-                    }
-                }
-            }
+                    Id = id,
+                    Name = reader.GetString(1),
+                });
+            });
+            _logger.Information($"Loaded {_store.Count} TTS voices from database.");
         }
 
-        public async Task<bool> Save()
+        public override void OnInitialAdd(string key, Voice value)
         {
-            var changes = false;
-            var sb = new StringBuilder();
-            var sql = "";
+            _idValidator.Check(value.Id);
+            _nameValidator.Check(value.Name);
+        }
+
+        public override void OnInitialModify(string key, Voice value)
+        {
+            _nameValidator.Check(value.Name);
+        }
+
+        public override void OnInitialRemove(string key)
+        {
+        }
+
+        public override async Task<bool> Save()
+        {
+            int count = 0;
+            string sql = string.Empty;
 
             if (_added.Any())
             {
-                int count = _added.Count;
-                sb.Append("INSERT INTO \"TtsVoice\" (id, name) VALUES ");
                 lock (_lock)
                 {
-                    foreach (var voiceId in _added)
-                    {
-                        string voice = _voices[voiceId];
-                        sb.Append("('")
-                            .Append(voiceId)
-                            .Append("','")
-                            .Append(voice)
-                            .Append("'),");
-                    }
-                    sb.Remove(sb.Length - 1, 1)
-                        .Append(';');
-
-                    sql = sb.ToString();
-                    sb.Clear();
+                    count = _added.Count;
+                    sql = _generator.GenerateInsertSql("TtsVoice", _added.Select(a => _store[a]), ["id", "name"]);
                     _added.Clear();
                 }
 
-                try
-                {
-                    _logger.Debug($"About to save {count} voices to database.");
-                    await _database.ExecuteScalar(sql);
-                }
-                catch (Exception ex)
-                {
-                    _logger.Error(ex, "Failed to save TTS voices on database: " + sql);
-                }
-                changes = true;
+                _logger.Debug($"ADD {count} " + sql);
+                await _database.ExecuteScalar(sql);
             }
-
             if (_modified.Any())
             {
-                int count = _modified.Count;
-                sb.Append("UPDATE \"TtsVoice\" as t SET name = c.name FROM (VALUES ");
                 lock (_lock)
                 {
-                    foreach (var voiceId in _modified)
-                    {
-                        string voice = _voices[voiceId];
-                        sb.Append("('")
-                            .Append(voiceId)
-                            .Append("','")
-                            .Append(voice)
-                            .Append("'),");
-                    }
-                    sb.Remove(sb.Length - 1, 1)
-                        .Append(") AS c(id, name) WHERE id = c.id;");
-
-
-                    sql = sb.ToString();
-                    sb.Clear();
+                    count = _modified.Count;
+                    sql = _generator.GenerateUpdateSql("TtsVoice", _modified.Select(m => _store[m]), ["id"], ["name"]);
                     _modified.Clear();
                 }
-
-                try
-                {
-                    _logger.Debug($"About to update {count} voices on the database.");
-                    await _database.ExecuteScalar(sql);
-                }
-                catch (Exception ex)
-                {
-                    _logger.Error(ex, "Failed to modify TTS voices on database: " + sql);
-                }
-                changes = true;
+                _logger.Debug($"MOD {count} " + sql);
+                await _database.ExecuteScalar(sql);
             }
-
             if (_deleted.Any())
             {
-                int count = _deleted.Count;
-                sb.Append("DELETE FROM \"TtsVoice\" WHERE id IN (");
                 lock (_lock)
                 {
-                    foreach (var voiceId in _deleted)
-                    {
-                        sb.Append("'")
-                            .Append(voiceId)
-                            .Append("',");
-                    }
-                    sb.Remove(sb.Length - 1, 1)
-                        .Append(");");
-
-
-                    sql = sb.ToString();
-                    sb.Clear();
+                    count = _deleted.Count;
+                    sql = _generator.GenerateDeleteSql("TtsVoice", _deleted, ["id"]);
                     _deleted.Clear();
                 }
-
-                try
-                {
-                    _logger.Debug($"About to delete {count} voices from the database.");
-                    await _database.ExecuteScalar(sql);
-                }
-                catch (Exception ex)
-                {
-                    _logger.Error(ex, "Failed to modify TTS voices on database: " + sql);
-                }
-                changes = true;
+                _logger.Debug($"DEL {count} " + sql);
+                await _database.ExecuteScalar(sql);
             }
-            return changes;
-        }
-
-        public bool Set(string? key, string? value)
-        {
-            if (key == null || value == null)
-                return false;
-            _voiceNameValidator.Check(value);
-
-            lock (_lock)
-            {
-                if (_voices.TryGetValue(key, out var voice))
-                {
-
-                    if (voice != value)
-                    {
-                        _voices[key] = value;
-                        if (!_added.Contains(key) && !_modified.Contains(key))
-                            _modified.Add(key);
-                    }
-                }
-                else
-                {
-                    _voiceIdValidator.Check(key);
-                    _voices.Add(key, value);
-                    if (!_deleted.Remove(key) && !_added.Contains(key))
-                        _added.Add(key);
-                }
-            }
-
             return true;
         }
     }