simplistic XMPP logging bot

logbot.js

/*jslint vars: true, node: true, white: true */

"use strict";

var xmpp = require("node-xmpp");

// XXX: hard-coded
var ROOM = "innoq@conference.jabber.innoq.com";
var NICK = "bot";

function main() {
	var args = process.argv;
	if(args.length !== 4) {
		console.error("Usage: `node echo_bot.js <jid> <password>`");
		process.exit(1);
	}
	var jid = args[2];
	var password = args[3];

	var client = new xmpp.Client({ jid: jid, password: password });
	client.on("online", onOnline);
	client.on("stanza", onStanza);
	client.on("error", onError);
}

function onOnline() {
	setStatus(this, "im in ur network, loggin' ur messages");
	joinRoom(this, ROOM, NICK);
	sendMessage(this, ROOM, "hello from Node", true);
}

function onStanza(stanza) {
	// XXX: DEBUG
	console.log("STANZA", stanza.attrs.from, stanza.attrs["xmlns:stream"]);
	console.log("=====", stanza, "-----");

	if(stanza.attrs.type === "error") {
		console.error("ERROR:", stanza);
	}
	var sender = stanza.attrs.from;
	if(sender.indexOf(ROOM + "/") !== 0) { // ignore out-of-room messages
		return;
	} else if(sender === ROOM + "/" + NICK) { // ignore own messages
		return;
	}

	var body = stanza.getChild("body");
	if(!body) { // probably a topic change
		return;
	}
	var message = body.getText();
	console.log(sender, message);
}

function onError(err) {
	console.error("ERROR:", err);
}

function sendMessage(client, recipient, message, groupchat) {
	var type = groupchat ? "groupchat" : "chat";
	var msg = new xmpp.Element("message", { type: type, to: recipient }).
		c("body").t(message);
	client.send(msg);
}

function joinRoom(client, room, nick) {
	var msg = new xmpp.Element("presence", { to: room + "/" + nick }).
		c("x", { xmlns: "http://jabber.org/protocol/muc" });
	client.send(msg);
}

function setStatus(client, status) {
	var msg = new xmpp.Element("presence", {}).c("show").t("chat").up().
		c("status").t(status);
	client.send(msg);
}

main();