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IrcMessage.cs
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IrcMessage.cs
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using System.Collections.Generic;
using System.Text;
namespace TwitchChatSharp
{
public enum ChatEdgeCluster {
Main,
Event,
Group,
Aws
}
public enum IrcCommand {
Unknown,
PrivMsg,
Notice,
Ping,
Pong,
Join,
Part,
HostTarget,
ClearChat,
UserState,
GlobalUserState,
Nick,
Pass,
Cap,
RPL_001,
RPL_002,
RPL_003,
RPL_004,
RPL_353,
RPL_366,
RPL_372,
RPL_375,
RPL_376,
Whisper,
RoomState,
Reconnect,
ServerChange,
UserNotice
}
/// <summary>
/// IRC PRIVMSG information
/// </summary>
public struct IrcMessage
{
/// <summary>
/// The channel the message was sent in
/// </summary>
public string Channel { get { return Params; } }
public string Params
{
get
{
return Parameters != null && Parameters.Length > 0 ? Parameters[0] : "";
}
}
/// <summary>
/// Message itself
/// </summary>
public string Message { get { return Trailing; } }
public string Trailing
{
get
{
return Parameters != null && Parameters.Length > 1 ? Parameters[Parameters.Length - 1] : "";
}
}
/// <summary>
/// Command parameters
/// </summary>
private readonly string[] Parameters;
/// <summary>
/// The user whose message it is
/// </summary>
public readonly string User;
/// <summary>
/// Hostmask of the user, e.g. ventic!ventic@3v.fi
/// </summary>
public readonly string Hostmask;
/// <summary>
/// Raw Command
/// </summary>
public readonly IrcCommand Command;
/// <summary>
/// IRCv3 tags
/// </summary>
public readonly Dictionary<string, string> Tags;
/// <summary>
/// Create an INCOMPLETE IrcMessage only carrying username
/// </summary>
/// <param name="user"></param>
public IrcMessage(string user)
{
Parameters = null;
User = user;
Hostmask = null;
Command = IrcCommand.Unknown;
Tags = null;
}
/// <summary>
/// Create an IrcMessage
/// </summary>
/// <param name="command">IRC Command</param>
/// <param name="parameters">Command params</param>
/// <param name="hostmask">User</param>
/// <param name="tags">IRCv3 tags</param>
public IrcMessage(IrcCommand command, string[] parameters, string hostmask, Dictionary<string, string> tags = null)
{
var idx = hostmask.IndexOf('!');
User = idx != -1 ? hostmask.Substring(0, idx) : hostmask;
Hostmask = hostmask;
Parameters = parameters;
Command = command;
Tags = tags;
}
/// <summary>
/// Swap the first character of the message
/// </summary>
/// <param name="prefix">new character</param>
/// <returns>Updated IrcMessage</returns>
public IrcMessage SwapCommandPrefix(string prefix)
{
if (Parameters.Length > 1 && Parameters[1].Length >= 1)
return new IrcMessage(Command, new string[] { Parameters[0], prefix + Parameters[1].Substring(1) }, User, Tags);
else
return this;
}
public new string ToString()
{
StringBuilder raw = new StringBuilder(32);
if (Tags != null)
{
string[] tags = new string[Tags.Count];
int i = 0;
foreach (var tag in Tags)
{
tags[i] = tag.Key + "=" + tag.Value;
++i;
}
if (tags.Length > 0)
{
raw.Append("@").Append(string.Join(";", tags)).Append(" ");
}
}
if (Hostmask != null && Hostmask.Length > 0)
{
raw.Append(":").Append(Hostmask).Append(" ");
}
raw.Append(Command.ToString().ToUpper().Replace("RPL_", ""));
if (Parameters.Length > 0)
{
if (Parameters[0] != null && Parameters[0].Length > 0)
{
raw.Append(" ").Append(Parameters[0]);
}
if (Parameters.Length > 1 && Parameters[1] != null && Parameters[1].Length > 0)
{
raw.Append(" :").Append(Parameters[1]);
}
}
return raw.ToString();
}
private enum parserState
{
STATE_NONE,
STATE_V3,
STATE_PREFIX,
STATE_COMMAND,
STATE_PARAM,
STATE_TRAILING
};
/// <summary>
/// Builds an IrcMessage from a raw string
/// </summary>
/// <param name="raw">Raw IRC message</param>
/// <returns>IrcMessage object</returns>
public static IrcMessage FromRawMessage(string raw)
{
var tagDict = new Dictionary<string, string>();
parserState state = parserState.STATE_NONE;
int[] starts = new int[] { 0, 0, 0, 0, 0, 0 };
int[] lens = new int[] { 0, 0, 0, 0, 0, 0 };
for (int i = 0; i < raw.Length; ++i)
{
lens[(int) state] = i - starts[(int) state] - 1;
if (state == parserState.STATE_NONE && raw[i] == '@')
{
state = parserState.STATE_V3;
starts[(int) state] = ++i;
int start = i;
string key = null;
for (; i < raw.Length; ++i)
{
if (raw[i] == '=')
{
key = raw.Substring(start, i - start);
start = i + 1;
}
else if (raw[i] == ';')
{
if (key == null)
tagDict[raw.Substring(start, i - start)] = "1";
else
tagDict[key] = raw.Substring(start, i - start);
start = i + 1;
}
else if (raw[i] == ' ')
{
if (key == null)
tagDict[raw.Substring(start, i - start)] = "1";
else
tagDict[key] = raw.Substring(start, i - start);
break;
}
}
}
else if (state < parserState.STATE_PREFIX && raw[i] == ':')
{
state = parserState.STATE_PREFIX;
starts[(int) state] = ++i;
}
else if (state < parserState.STATE_COMMAND)
{
state = parserState.STATE_COMMAND;
starts[(int) state] = i;
}
else if (state < parserState.STATE_TRAILING && raw[i] == ':')
{
state = parserState.STATE_TRAILING;
starts[(int) state] = ++i;
break;
}
else if (state == parserState.STATE_COMMAND)
{
state = parserState.STATE_PARAM;
starts[(int) state] = i;
}
while (i < raw.Length && raw[i] != ' ')
++i;
}
lens[(int) state] = raw.Length - starts[(int) state];
string cmd = raw.Substring(starts[(int) parserState.STATE_COMMAND], lens[(int) parserState.STATE_COMMAND]);
IrcCommand command = IrcCommand.Unknown;
switch (cmd)
{
case "PRIVMSG":
command = IrcCommand.PrivMsg;
break;
case "NOTICE":
command = IrcCommand.Notice;
break;
case "PING":
command = IrcCommand.Ping;
break;
case "PONG":
command = IrcCommand.Pong;
break;
case "HOSTTARGET":
command = IrcCommand.HostTarget;
break;
case "CLEARCHAT":
command = IrcCommand.ClearChat;
break;
case "USERSTATE":
command = IrcCommand.UserState;
break;
case "GLOBALUSERSTATE":
command = IrcCommand.GlobalUserState;
break;
case "NICK":
command = IrcCommand.Nick;
break;
case "JOIN":
command = IrcCommand.Join;
break;
case "PART":
command = IrcCommand.Part;
break;
case "PASS":
command = IrcCommand.Pass;
break;
case "CAP":
command = IrcCommand.Cap;
break;
case "001":
command = IrcCommand.RPL_001;
break;
case "002":
command = IrcCommand.RPL_002;
break;
case "003":
command = IrcCommand.RPL_003;
break;
case "004":
command = IrcCommand.RPL_004;
break;
case "353":
command = IrcCommand.RPL_353;
break;
case "366":
command = IrcCommand.RPL_366;
break;
case "372":
command = IrcCommand.RPL_372;
break;
case "375":
command = IrcCommand.RPL_375;
break;
case "376":
command = IrcCommand.RPL_376;
break;
case "WHISPER":
command = IrcCommand.Whisper;
break;
case "SERVERCHANGE":
command = IrcCommand.ServerChange;
break;
case "RECONNECT":
command = IrcCommand.Reconnect;
break;
case "ROOMSTATE":
command = IrcCommand.RoomState;
break;
case "USERNOTICE":
command = IrcCommand.UserNotice;
break;
}
string parameters = raw.Substring(starts[(int) parserState.STATE_PARAM], lens[(int) parserState.STATE_PARAM]);
string message = raw.Substring(starts[(int) parserState.STATE_TRAILING], lens[(int) parserState.STATE_TRAILING]);
string hostmask = raw.Substring(starts[(int) parserState.STATE_PREFIX], lens[(int) parserState.STATE_PREFIX]);
return new IrcMessage(command, new string[] { parameters, message }, hostmask, tagDict);
}
}
}