Code for "Good Morning Twitter"

render.js

var fs = require('fs');
var moment = require('moment');

var width = 3000;
var height = 4000;
var scaleX = (width - 100 ) / (360 +20);
var scaleY = (height + 00) / (24 * 60);
var offsetTop = 0;

var calcX = function(n){
	return width / 2 + scaleX * n;
}

function isOdd(num) { return num % 2;}

var pad = function(n) {
    
	if (n > 100) {
		n = "+" + n;
	}
	
	else if (n < 100 && n > 0) {
		n = "+0" + n;
	}
	
	else if (n === 0) {
		n = "+00" + n;
	}
	
	else if (n > -100 && n < 0) {
		n = "-0" + n * -1;
	}
	
	return n;
}
var svg_meta = {
	header: '<?xml version="1.0"?>\n<svg style="fill:#fff" viewBox="0 0 ' + width + ' ' + height + '" version="1.1">\n\n <rect x="00" y="0" style="fill:#ff1d00" width="' + width + '" height="' + height + '"/>',
	footer: '</svg>'
}

var drawMetrics = function(metrics){
	var metrics_SVG = '';
	
	for (var i = -180; i <= 180; i += 5) {
		metrics_SVG += '<rect y="140" x="' + calcX(i) + '" width="8" height="20"></rect>'
	}
	for (var i = -180; i <= 180; i += 20) {
		metrics_SVG += '<rect y="140" x="' + calcX(i) + '" width="8" height="30"></rect>'
		metrics_SVG += '<text x="' + (calcX(i) - 45 ) + '" y="100" font-family="Ubuntu Mono" font-size="35px">' + pad(i) + '</text>\n'
	}

	
	metrics.forEach(function(metric){
		var y = metric[2];
		
		console.log('metric added: ' + metric[1]);
		metrics_SVG += '<text x="' + calcX(metric[0]) + '" y="' + y + '" style="fill:#050507" font-family="Ubuntu Mono" font-size="55px">' + metric[1] + '</text>\n';
		metrics_SVG += '<rect y="140" style="fill:#000" x="' + calcX(metric[0]) + '" width="8" height="30"></rect>';
	});	
	fs.appendFile('render.svg', metrics_SVG, function (err) {
		if (err) throw err;
		fs.appendFile('render.svg', svg_meta.footer, function (err) {
				if (err) throw err;
				console.log('svg footer added');
		});
	});	
}

var render = function(data){
	
	var t_start = moment(data[0].timestamp)
	
	var svg = '';
	data.forEach(function(point){
		
		var t = moment(point.timestamp);
		var t_passed = t.diff(t_start, 'minutes');	
		var x = calcX(point.position[1]);
		var y = scaleY * t_passed + offsetTop;
		
		svg += '<circle cx="' + x + '" cy="' + y + '" r="' + 6 + '"/>\n';
	});
	
	fs.appendFile('render.svg', svg, function (err) {
		if (err) throw err;
		console.log('points rendered');
	});
} 
//Clear file
fs.open('render.svg', 'w', function(error, fd){
	fs.writeSync(fd, svg_meta.header);
	console.log('file cleared')
})

fs.readFile('output-one.json', function (err, data) {
	if (err) throw err;
	tweets = JSON.parse(data);
	console.log(tweets.length + " Tweets found");
	
	
	render(tweets);
	drawMetrics([
		[-157.7964, 'Hawaii', 220],
		[-118.2500, 'Los Angeles', 220],
		[-122.4167, 'San Francisco', 270],
		[-99.1333, 'Mexico City', 320],
		[-75.1890, 'New York', 220],
		[-43.1729, 'Rio de Janeiro', 270],
		[-0, 'London', 220],
		[2.3508, 'Paris', 320],
		[13.3833, 'Berlin', 370],
		[28.6139, 'New Delhi', 220],
		[37.6167, 'Moscow', 270],
		[103.8000, 'Singapore', 220],
		[114.1747, 'Hong Kong', 270],
		[121.5000, 'Shanghai', 320],
		[126.9781, 'Seoul', 370],
		[139.6917, 'Tokyo', 420],
		[151.2094, 'Sydney', 220],
	]);
	
	
});

stream.js

var fs = require('fs');
var Twitter = require('twitter');

var counter = 0;
var terms = 'good morning, goodmorning, 早安, bonjour, בֹּקֶר טוֹב, guten morgen, gutenmorgen, गुड मॉर्निंग, buongiorno, お早う, 안녕하세요, доброе утро, buenos días, buenosdías, günaydın';

fs.open('output-one.json', 'w')

client.stream('statuses/filter', {track: terms, replies: 'all'}, function(stream) {	
	stream.on('data', function(tweet) {
	 if(tweet.geo != null){ 
		counter += 1; 
		var json_data = createTweetJSON(tweet);
		fs.appendFile('output-one.json', json_data + ',' + '\n', function (err) {
  			if (err) throw err;
			console.log('↓ \n');
		});
	 }
  });

  stream.on('error', function(error) {
    throw error;
  });
});