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+#region License
+
+// Copyright (C) 2020 Reetus
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#endregion
+
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Text.RegularExpressions;
+using ClassicAssist.UO.Data;
+
+namespace ClassicAssist.Data.Chat
+{
+    public class ChatManager
+    {
+        public delegate void dChannelCreated( string channel );
+
+        public delegate void dChannelRemoved( string channel );
+
+        public delegate void dChatMessage( string username, string channel, string message );
+
+        public delegate void dClearUsers();
+
+        public delegate void dJoinedChatChannel( string channel );
+
+        public delegate void dLeftChatChannel( string channel );
+
+        public delegate void dUserJoined( string username, string channel );
+
+        public delegate void dUserLeft( string username, string channel );
+
+        private static readonly object _instanceLock = new object();
+        private static ChatManager _instance;
+        public List<string> Channels { get; set; } = new List<string>();
+
+        public string CurrentChannel { get; set; }
+
+        public ObservableCollection<ChatMessage> Messages { get; set; } = new ObservableCollection<ChatMessage>();
+
+        public List<string> Users { get; set; } = new List<string>();
+
+        public event dJoinedChatChannel JoinedChatChannelEvent;
+        public event dLeftChatChannel LeftChatChannelEvent;
+        public event dChannelCreated ChannelCreatedEvent;
+        public event dChannelRemoved ChannelRemovedEvent;
+        public event dChatMessage ChatMessageEvent;
+        public event dUserJoined UserJoinedEvent;
+        public event dUserLeft UserLeftEvent;
+        public event dClearUsers ClearUsersEvent;
+
+        public static ChatManager GetInstance()
+        {
+            // ReSharper disable once InvertIf
+            if ( _instance == null )
+            {
+                lock ( _instanceLock )
+                {
+                    if ( _instance == null )
+                    {
+                        _instance = new ChatManager();
+                    }
+                }
+            }
+
+            return _instance;
+        }
+
+        public void OnChatPacket( PacketReader reader )
+        {
+            int messageNum = reader.ReadInt16();
+
+            reader.ReadString( 4 ); // Language
+
+            byte[] packet = reader.GetData();
+
+            switch ( messageNum )
+            {
+                case 0x25:
+                {
+                    int messageType = reader.ReadInt16();
+                    string username = reader.ReadUnicodeString();
+                    string message = reader.ReadUnicodeString();
+
+                    Match matches = Regex.Match( message, "{(.*)}\\s+(.*)" );
+
+                    if ( matches.Success )
+                    {
+                        string channel = matches.Groups[1].Value;
+                        string text = matches.Groups[2].Value;
+
+                        Messages.Add( new ChatMessage { Username = username, Channel = channel, Text = text } );
+                        ChatMessageEvent?.Invoke( username, channel, text );
+                    }
+
+                    break;
+                }
+
+                case 0x3e8:
+                {
+                    string channel = reader.ReadUnicodeString();
+
+                    if ( !Channels.Contains( channel ) )
+                    {
+                        Channels.Add( channel );
+                        ChannelCreatedEvent?.Invoke( channel );
+                    }
+
+                    break;
+                }
+
+                case 0x3e9:
+                {
+                    string channel = reader.ReadUnicodeString();
+
+                    if ( Channels.Contains( channel ) )
+                    {
+                        Channels.Remove( channel );
+                        ChannelRemovedEvent?.Invoke( channel );
+                    }
+
+                    break;
+                }
+
+                case 0x3ee:
+                {
+                    reader.ReadInt16();
+                    string userName = reader.ReadUnicodeString();
+
+                    if ( !Users.Contains( userName ) )
+                    {
+                        Users.Add( userName );
+                        UserJoinedEvent?.Invoke( userName, string.Empty );
+                    }
+
+                    break;
+                }
+                case 0x3ef:
+                {
+                    string userName = reader.ReadUnicodeString();
+
+                    if ( Users.Contains( userName ) )
+                    {
+                        Users.Remove( userName );
+                        UserLeftEvent?.Invoke( userName, string.Empty );
+                    }
+
+                    break;
+                }
+
+                case 0x3f1:
+                {
+                    CurrentChannel = reader.ReadUnicodeString();
+                    JoinedChatChannelEvent?.Invoke( CurrentChannel );
+                    break;
+                }
+
+                case 0x3f0:
+                {
+                    Users.Clear();
+                    ClearUsersEvent?.Invoke();
+                    break;
+                }
+
+                case 0x3f4:
+                {
+                    LeftChatChannelEvent?.Invoke( CurrentChannel );
+                    CurrentChannel = null;
+                    break;
+                }
+
+                // ReSharper disable once RedundantEmptySwitchSection
+                default:
+                    break;
+            }
+        }
+    }
+}