Basic XMPP bot example for HipChat using node.js

hipchat_bot.js

// Basic XMPP bot example for HipChat using node.js
// To use:
//  1. Set config variables
//  2. Run `node hipchat_bot.js`
//  3. Send a message like "!weather 94085" in the room with the bot


var request = require('request'); // github.com/mikeal/request
var sys = require('sys');
var util = require('util');
var xmpp = require('node-xmpp');

// Config (get details from https://www.hipchat.com/account/xmpp)
var jid = "[email protected]"
var password = ""
var room_jid = "[email protected]"
var room_nick = "Xxx Xxx"

var cl = new xmpp.Client({
  jid: jid + '/bot',
  password: password
});

// Log all data received
//cl.on('data', function(d) {
//  util.log("[data in] " + d);
//});

// Once connected, set available presence and join room
cl.on('online', function() {
  util.log("We're online!");

  // set ourselves as online
  cl.send(new xmpp.Element('presence', { type: 'available' }).
    c('show').t('chat')
   );

  // join room (and request no chat history)
  cl.send(new xmpp.Element('presence', { to: room_jid+'/'+room_nick }).
    c('x', { xmlns: 'http://jabber.org/protocol/muc' }).
      c('history', { maxchars: '0'})
  );

  // send keepalive data or server will disconnect us after 150s of inactivity
  setInterval(function() {
    cl.send(' ');
  }, 30000);
});

cl.on('stanza', function(stanza) {
  // always log error stanzas
  if (stanza.attrs.type == 'error') {
    util.log('[error] ' + stanza);
    return;
  }

  // ignore everything that isn't a room message
  if (!stanza.is('message') || !stanza.attrs.type == 'groupchat') {
    return;
  }

  // ignore messages we sent
  if (stanza.attrs.from == room_jid+'/'+room_nick) {
    return;
  }

  var body = stanza.getChild('body');
  // message without body is probably a topic change
  if (!body) {
    return;
  }
  var message = body.getText();

  // Look for messages like "!weather 94085"
  if (message.indexOf('!weather') === 0) {
    var search = message.substring(9);
    util.log('Fetching weather for: "' + search + '"');

    // hit Yahoo API
    var query = 'select item from weather.forecast where location = "'+search+'"';
    var uri = 'http://query.yahooapis.com/v1/public/yql?format=json&q='+encodeURIComponent(query);
    request({'uri': uri}, function(error, response, body) {
      body = JSON.parse(body);
      var item = body.query.results.channel.item;
      if (!item.condition) {
        response = item.title;
      } else {
        response = item.title+': '+item.condition.temp+' degrees and '+item.condition.text;
      }

      // send response
      cl.send(new xmpp.Element('message', { to: room_jid, type: 'groupchat' }).
        c('body').t(response)
      );
    });
  }
});

// when exiting, send proper exit info to server
// and also a nice message
// then exit on next processTick
process.on('SIGINT', function() {

    util.log("shutting down this bot!");
    
    // send response
    cl.send(new xmpp.Element('message', { to: room_jid, type: 'groupchat' }).
      c('body').t('Heading out, everybody. Ciao.')
    );
    
    cl.send(new xmpp.Element('presence', { type: 'unavailable', to: room_jid+'/'+room_nick })
    );
    
    process.nextTick(function() {
	process.exit(0);
    });
});

A couple of changes from original author's:

When joining room, adding the following so that previous chathistory is not sent to the bot:
c('history', { maxchars: '0'})

When sending the msg, don't send privately, send to the whole room (by removing the /room_nick)

Adding a proper exit routine.