app.js

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var routes = require('./routes/index');

var app = express();
var http = require('http').createServer(app);
var io = require('socket.io').listen(http);
var Twitter = require('twit');
var dotenv = require('dotenv');
dotenv.load();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);


var client = new Twitter({
	consumer_key: process.env.CONSUMER_KEY,
	consumer_secret: process.env.CONSUMER_SECRET,
	access_token: process.env.ACCESS_TOKEN,
	access_token_secret: process.env.ACCESS_SECRET
});


io.sockets.on('connection', function(socket){

	socket.on('trends', function(){
		client.get('trends/place', {id: 23424977}, function(error, data, response) {
			console.log('trends started');
			if (!error) {
				var trendList = data[0].trends;
				var trackList = [];
				for(var i=0; i < 10; i++){
                    if (trendList[i] && trendList[i].name)
                        trackList.push(trendList[i].name);
				}
				getStream(trackList.toString());
			}
		});
	});

	socket.on('search', function(value) {
		getStream(value);
	});

	function getStream(query) {
		var stream = client.stream('statuses/filter', {track: query});
		stream.on('tweet', function(tweet){
			socket.emit('tweet', tweet);
			console.log(tweet.text);
		});
		stream.on('error', function(error){
			//socket.emit('tweet', tweet);
			socket.emit('error', error);
		});
		socket.on('end', function(){
			stream.stop();
		});
		socket.on('disconnect', function(){
			stream.stop();
		});
	}

});


// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});

http.listen(process.env.PORT || 3000);
console.log('listening on port ' + process.env.PORT + ':');
module.exports = app;