circl/lib/circl.js

Concise IRC client library

var net = require("net"),
    fs = require("fs"),
    eh = require("./event.js");

function IRCClient (nick, mode, channels, host, port, log) {
    "use strict";
    this.nick = nick;
    this.mode = mode;
    this.channels = channels;
    this.host = host;
    this.port = port;
    this.log = log;

    this.socket = this.newIRCSocket();
    this.handler = new eh.EventHandler();
    this.timeout = 120;
    this.triggers = this.handler.triggers;
    this.serverReady = false;
    this.isPinging = false;

    this.addDefaultTriggers();
}

IRCClient.prototype = {
    newIRCSocket: function () {
        var self = this,
            socket = new net.Socket();

        socket.on("data", function (data) {
            self.onData(data, self.log);
        });
        socket.on("connect", function () {
            self.onConnect(self.nick, self.mode);
        });
        socket.on("disconnect", function () {
            self.onDisconnect();
        });
        socket.on("end", function () {
            self.onDisconnect();
        });
        socket.on("timeout", function () {
            self.onTimeout();
        });

        socket.setTimeout(this.timeout * 1000, this.connect);
        socket.setEncoding("utf8");
        socket.setNoDelay();
        return socket;
    },
    addDefaultTriggers: function () {
        var self = this;
        if (this.channels.length) {
            this.addTrigger(/^[^ ]+ 001/, function () {
                self.serverReady = true;
                self.send(["JOIN", self.channels.join()].join(" "));
            });
        }
        this.addTrigger(/^PING (.+)/, function (groups) {
            self.send(["PONG", groups[1]].join(" "));
        });
    },
    connect: function (socket) {
        socket.connect(this.port, this.host);
    },
    send: function (data) {
        this.socket.write(data + "\n", "utf8", function () {
            if (this.log) {
                process.stderr.write(data + "\n");
            }
        }.bind(this));
    },
    addTrigger: function (trigger, callback) {
        this.triggers.push([trigger, callback]);
    },
    onConnect: function (nick, mode) {
        this.send(["NICK", nick].join(" "));
        this.send(["USER", nick, mode, "*", ":"].join(" ") + nick);
        this.startPinging();
    },
    onDisconnect: function () {
        this.serverReady = false;
        this.socket = this.newIRCSocket();
        this.connect(this.socket);
    },
    onTimeout: function () {
        this.socket.end();
        this.onDisconnect();
    },
    onData: function (data, log) {
        if (log) {
            console.log(data);
        }
        this.handler.handle(data);
    },
    ping: function () {
        if (this.serverReady) {
            this.send("PING :foo");
        }
    },
    startPinging: function () {
        if (!this.isPinging) {
            setInterval(this.ping, this.timeout * 1000 / 2);
        }
    }
};

exports.IRCClient = IRCClient;