My IRC bot template..

ircbot-template.js

#!/usr/bin/env node
'use strict';
// IRC bot by djazz

// Modules
//var http = require('http');
var irc = require('irc');
var colors = require('colors');
var util = require('util');
var readline = require('readline');


// Config
var SERVER = 'irc.canternet.org';	// The server we want to connect to
var PORT = 6667;					// The connection port which is usually 6667
var NICK = 'djazzbot';				// The bot's nickname 
var IDENT = null;					// Password of the bot. Set to null to not use password login.
var REALNAME = 'djazz\'s bot';		// Real name of the bot
var CHANNEL = '#BronyTalk';			// The default channel for the bot 

var airDate = Date.UTC(2013, 11-1, 23, 15, 30, 0); // Year, month-1, day, hour, minute, second (UTC)
var week = 7*24*60*60*1000;

function handleMessage(nick, message, simplified, isMentioned, isPM) {
	var target = isPM ? nick : CHANNEL;

	if (simplified[0] === "!test") {
		sendPM(target, irc.colors.wrap("orange", "Test success!"));
	} else if (simplified[0] === '!nextep') {
		var counter = 0;
		var now = Date.now();
		do {
			var timeLeft = Math.max(((airDate+week*(counter++)) - now)/1000, 0);
		} while (timeLeft === 0 && counter < 26);
		if (timeLeft === 0) {
			sendPM(target, "Season 4 is over :(");
		} else {
			sendPM(target, "Next S4 episode airs in %s", readableTime(timeLeft, true));
		}
		
	} else if (isMentioned) {
		sendPM(target, ":3");
	}

	// use sendChat to send to channel, or sendPM(target, msg) to send to channel or private chat.

}

var bot = new irc.Client(SERVER, NICK, {
	channels: [CHANNEL],
	password: IDENT,
	realName: REALNAME,
	port: PORT,
	stripColors: true
});
var lasttopic = "";
var lasttopicnick = "";

bot.on('error', function (message) {
	info('ERROR: %s: %s', message.command, message.args.join(' '));
});
bot.on('topic', function (channel, topic, nick) {
	lasttopic = topic;
	lasttopicnick = nick;
	logTopic(channel, topic, nick);
});
bot.on('message'+CHANNEL, function (from, message) {
	var simplified = message.replace(/\:/g, ' ').replace(/\,/g, ' ').replace(/\./g, ' ').replace(/\?/g, ' ').trim().split(' ');
	var isMentioned = simplified.indexOf(NICK) !== -1;
	logChat(from, message, isMentioned);
	handleMessage(from, message, simplified, isMentioned, false);
});
bot.on('join'+CHANNEL, function (nick) {
	if (nick === NICK) {
		info("You joined channel "+CHANNEL.bold);
		rl.setPrompt(util.format("> ".bold.magenta), 2);
		rl.prompt(true);
	} else {
		mylog((" --> ".green.bold)+'%s has joined %s', nick.bold, CHANNEL.bold);
	}
});
bot.on('part'+CHANNEL, function (nick) {
	if (nick !== NICK) {
		mylog((" <-- ".red.bold)+'%s has left %s', nick.bold, CHANNEL.bold);
	}
});
bot.on('pm', function (nick, message) {
	logPM(nick, message);
	var simplified = message.replace(/\:/g, ' ').replace(/\,/g, ' ').replace(/\./g, ' ').replace(/\?/g, ' ').trim().split(' ');
	var isMentioned = simplified.indexOf(NICK) !== -1;
	handleMessage(nick, message, simplified, isMentioned, true);
});
bot.on('notice', function (nick, to, text) {
	//mylog(nick, to, text);
});
bot.on('raw', function (message) {
	if (message.command === 'PRIVMSG' && message.args[0] === CHANNEL && message.args[1].indexOf("\u0001ACTION ") === 0) {
		var action = message.args[1].substr(8);
		action = action.substring(0, action.length-1);
		mylog("* %s".bold+" %s", message.nick, action);
	}
});

var rl = readline.createInterface({
	input: process.stdin,
	output: process.stdout
});
rl.setPrompt("");

rl.on('line', function (line) {
	
	if (line === '') {
		return;
	}

	if (line.indexOf('/quit') === 0) {
		info("Quitting...");
		rl.setPrompt("");
		bot.disconnect("Quitting..", function () {
			process.exit(0);
		});
		return;
	} else if (line.indexOf('/msg ') === 0) {
		var split = line.split(" ");

		var nick = split[1];
		var msg = split.slice(2).join(" ");
		sendPM(nick, msg);
	} else if (line.indexOf('/me ') === 0) {
		var msg = line.substr(4);
		bot.action(CHANNEL, msg);
	} else if (line === '/topic') {
		logTopic(CHANNEL, lasttopic, lasttopicnick);
	} else if (line.indexOf("/") === 0) {
		info(("Unknown command "+line.substr(1).bold).red);
	} else {
		sendChat(line);
	}
	rl.prompt(true);
});

info('Connecting...');

function mylog() {
	// rl.pause();
	rl.output.write('\x1b[2K\r');
	console.log.apply(console, Array.prototype.slice.call(arguments));
	// rl.resume();
	rl._refreshLine();
}


function info() {
	arguments[0] = "  -- ".magenta+arguments[0];
	mylog(util.format.apply(null, arguments));
}

function sendChat() {
	var message = util.format.apply(null, arguments);
	logChat(NICK, message);
	bot.say(CHANNEL, message);
}
function sendPM(target) {
	if (target === CHANNEL) {
		sendChat.apply(null, Array.prototype.slice.call(arguments, 1));
		return;
	}
	var message = util.format.apply(null, Array.prototype.slice.call(arguments, 1));
	logPM(NICK+" -> "+target, message);
	bot.say(target, message);
}
function logChat(nick, message, isMentioned) {
	if (isMentioned) {
		nick = nick.yellow;
	}
	mylog('%s: %s', nick.bold, message);
}
function logPM(target, message) {
	mylog('%s: %s', target.bold.blue, message);
}
function logTopic(channel, topic, nick) {
	info('Topic for %s is "%s" set by %s', channel.bold, topic.yellow, nick.bold.cyan);
}

function zf(v) {
	if (v > 9) {
		return ""+v;
	} else {
		return "0"+v;
	}
}
function readableTime(timems, ignoreMs) {
	var time = timems|0;
	var ms = ignoreMs?'':"."+zf((timems*100)%100|0);
	if (time < 60) return zf(time)+ms+"s";
	else if (time < 3600) return zf(time / 60|0)+"m "+zf(time % 60)+ms+"s";
	else if (time < 86400) return zf(time / 3600|0)+"h "+zf((time % 3600)/60|0)+"m "+zf((time % 3600)%60)+ms+"s";
	else return (time / 86400|0)+"d "+zf((time % 86400)/3600|0)+"h "+zf((time % 3600)/60|0)+"m "+zf((time % 3600)%60)+"s";
}