/// <summary>
/// IRC protocol implementation per IRC RFC 2812 https://tools.ietf.org/html/rfc2812
/// </summary>
public void ReadProtocol()
{
var command = _sr.ReadLine();
Console.WriteLine(command);
IRCCommand cmd = IRCCommand.Parse(command);
if (command == null || cmd == null)
{
return;
}
switch (cmd.Command)
{
case "001": //RPL_WELCOME
case "002": //RPL_YOURHOST
case "003": //RPL_CREATED
case "004": //RPL_MYINFO
case "NOTICE": //NOTICE
OnServerMessage(command);
SendCommand("JOIN " + Channel);
break;
case "332":
OnServerMessage(command);
break;
case "353": //RPL_NAMREPLY
//make sure if for this channel,
//i think i might get lists for all
//channels in the server.
if (cmd.Arguments[2] == Channel)
{
//lists of users for the channel we are connected
//lets ignore the type of channels for now (@, =, *)
var ulea = new UserListEventArgs
{
Users = new List <string>(cmd.Arguments[3].Split(' '))
};
//checks if the command before this one was a 353,
//if it is, that means the list of users was not completely
//received, so this packet is a continuation of the list.
//otherwise, this is the beginning of the list.
if (_previousCommand != "353")
{
ulea.Type = UserListMessageType.ListStart;
}
else if (_previousCommand == "353")
{
ulea.Type = UserListMessageType.ListContinue;
}
OnUserList(ulea);
}
break;
case "366": //RPL_ENDOFNAMES
//this is the end of the list of users.
OnUserList(new UserListEventArgs()
{
Type = UserListMessageType.ListEnd
});
break;
case "433": //ERR_NICKNAMEINUSE
//tries to log in with a different nickname
SendCommand("NICK " + Nickname + "_" + new Random().Next(100));
break;
case "PRIVMSG": //new message to the channel, or private
ReceivedEventArgs rec = new ReceivedEventArgs
{
MessageFrom = cmd.Prefix.Substring(0, cmd.Prefix.IndexOf("!", StringComparison.Ordinal))
};
//TODO: handle messages that are for specific users, and show them in a unique way
//maybe something like FromUser > ToUser: Hello, World!
//let us worry about
//public and private messages only
if (cmd.Arguments[0] == Nickname)
{
rec.Type = MessageType.MessageToMe;
}
else
{
rec.Type = MessageType.MessageToChannel;
}
rec.Message = cmd.Arguments[1];
OnReceived(rec);
break;
case "PING": //reply with pong :p
SendCommand("PONG " + command.Substring(5));
break;
case "JOIN": //someone joined the channel
//two options: We could either re-ask for the entire list
//or simply add the specific user
string userJoined = cmd.Prefix.Substring(0, cmd.Prefix.IndexOf("!", StringComparison.Ordinal));
if (userJoined != Nickname)
{
OnUserJoined(userJoined);
}
else
{
//this is when I joined the channel.
OnConnected();
IsConnected = true;
}
break;
case "PART": //someone has left/quit the channel
case "QUIT":
string userLeft = cmd.Prefix.Substring(0, cmd.Prefix.IndexOf("!", StringComparison.Ordinal));
if (userLeft != Nickname)
{
OnUserQuit(userLeft);
}
else
{
//leave chatroom gracefully
OnQuit();
IsConnected = false;
}
break;
case "NICK": //change in nick
if (cmd.Arguments != null && cmd.Arguments.Count > 0)
{
var newNickname = cmd.Arguments[0];
var oldNickname = cmd.Prefix.Substring(0, cmd.Prefix.IndexOf("!", StringComparison.Ordinal));
//raise this event to update the nickname in the lists
OnNicknameChanged(oldNickname, newNickname, NicknameChangedType.NickChanged);
}
break;
case "ERROR":
OnQuit();
IsConnected = false;
break;
}
_previousCommand = cmd.Command;
}
/// <summary>
/// Get the IRC command, per IRC RFC 2812 https://tools.ietf.org/html/rfc2812
/// </summary>
/// <param name="raw">Raw string to be parsed.</param>
/// <returns>An IRCCommand object with all the members to make sense out of the protocol.</returns>
public static IRCCommand Parse(string raw)
{
IRCCommand tmp = null;
if (!string.IsNullOrEmpty(raw))
{
string trailing = null;
try
{
if (raw.StartsWith(":"))
{
tmp = new IRCCommand();
var prefixEnd = raw.IndexOf(" ", StringComparison.Ordinal);
tmp.Prefix = raw.Substring(1, prefixEnd - 1);
var trailingStart = raw.IndexOf(" :", StringComparison.Ordinal);
if (trailingStart > -1)
{
trailing = raw.Substring(trailingStart + 2);
}
else
{
trailingStart = raw.Length;
}
var commandAndParameters = raw.Substring(prefixEnd + 1, trailingStart - prefixEnd - 1).Split(' ');
tmp.Command = commandAndParameters.First(); //this is the command
if (commandAndParameters.Length > 1)
tmp.Arguments = commandAndParameters.Skip(1).ToList(); //dont take the first one, thats the command
if (!string.IsNullOrEmpty(trailing))
{
if (tmp.Arguments == null)
{
tmp.Arguments = new List<string>();
}
tmp.Arguments = tmp.Arguments.Concat(new[] { trailing }).ToList();
}
}
else
{
if (raw.ToLower().StartsWith("ping"))
{
tmp = new IRCCommand
{
Command = "PING",
Arguments = new List<string> {raw.Substring(5)}
};
}
else if (raw.ToLower().StartsWith("error"))
{
tmp = new IRCCommand
{
Command = "ERROR",
Arguments = new List<string>()
};
tmp.Arguments.AddRange(raw.Split(':').Skip(1));
}
}
}
catch
{
tmp = null;
}
}
return tmp;
}
/// <summary>
/// Get the IRC command, per IRC RFC 2812 https://tools.ietf.org/html/rfc2812
/// </summary>
/// <param name="raw">Raw string to be parsed.</param>
/// <returns>An IRCCommand object with all the members to make sense out of the protocol.</returns>
public static IRCCommand Parse(string raw)
{
IRCCommand tmp = null;
if (!string.IsNullOrEmpty(raw))
{
string trailing = null;
try
{
if (raw.StartsWith(":"))
{
tmp = new IRCCommand();
var prefixEnd = raw.IndexOf(" ", StringComparison.Ordinal);
tmp.Prefix = raw.Substring(1, prefixEnd - 1);
var trailingStart = raw.IndexOf(" :", StringComparison.Ordinal);
if (trailingStart > -1)
{
trailing = raw.Substring(trailingStart + 2);
}
else
{
trailingStart = raw.Length;
}
var commandAndParameters = raw.Substring(prefixEnd + 1, trailingStart - prefixEnd - 1).Split(' ');
tmp.Command = commandAndParameters.First(); //this is the command
if (commandAndParameters.Length > 1)
{
tmp.Arguments = commandAndParameters.Skip(1).ToList(); //dont take the first one, thats the command
}
if (!string.IsNullOrEmpty(trailing))
{
if (tmp.Arguments == null)
{
tmp.Arguments = new List <string>();
}
tmp.Arguments = tmp.Arguments.Concat(new[] { trailing }).ToList();
}
}
else
{
if (raw.ToLower().StartsWith("ping"))
{
tmp = new IRCCommand
{
Command = "PING",
Arguments = new List <string> {
raw.Substring(5)
}
};
}
else if (raw.ToLower().StartsWith("error"))
{
tmp = new IRCCommand
{
Command = "ERROR",
Arguments = new List <string>()
};
tmp.Arguments.AddRange(raw.Split(':').Skip(1));
}
}
}
catch
{
tmp = null;
}
}
return(tmp);
}
