tweet_repel.js

var arDrone = require('..');
var http    = require('http');

var Twit = require('twit');

var T = new Twit({
    consumer_key:         '....',
    consumer_secret:      '....',
    access_token:         '....',
    access_token_secret:  '....'
  });


var client = arDrone.createClient();
client.disableEmergency();

console.log('Connecting png stream ...');
var pngStream = client.getPngStream();

console.log('Connecting twitter stream ...');
var stream = T.stream('user');

var lastPng;
pngStream
  .on('error', console.log)
  .on('data', function(pngBuffer) {
    lastPng = pngBuffer;
  });

var server = http.createServer(function(req, res) {
  if (!lastPng) {
    res.writeHead(503);
    res.end('Did not receive any png data yet.');
    return;
  }

  res.writeHead(200, {'Content-Type': 'image/png'});
  res.end(lastPng);
});

function do_action(str) {
    switch (true) {
      case /^to/.test(str):
        console.log("• doing takeoff");
        client.takeoff();
        break;
      case /^la/.test(str):
        console.log("• doing land");
        client.land();
        break;
      case /^st/.test(str):
        console.log("• doing stop");
        client.stop();
        break;
      case /^cw/.test(str):
        console.log("• rotate clockwise");
        client.clockwise(0.5);
        break;
      case /^cc/.test(str):
        console.log("• rotate counterclockwise");
        client.clockwise(-0.5);
        break;
      default:
        console.log("• unknown command:" + str + ":");
        break;
    }
  }

console.log('streaming from twitter...');
stream.on('tweet', function (tweet) {

  var msg = tweet.text.split(" ").slice(1).join(" ");
  console.log("got msg from twitter:" + msg + ":");
  do_action(msg);

});

server.listen(8080, function() {
  console.log('Serving latest png on port 8080 ...');

});