sherlock-log/pocs/clui-test.js

var CLI = require('clui'),
    clc = require('cli-color'),
    os  = require('os');

var Line          = CLI.Line,
		Gauge         = CLI.Gauge;
		Sparkline     = CLI.Sparkline;

var drawTimeout;
var requestSeries = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
var errorSeries = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];

function draw() {
	console.log(clc.reset);

	var blankLine = new Line().fill().output();

	var total = os.totalmem();
	var free = os.freemem();
	var used = total-free;
	var human = Math.ceil(used / 1000000) + ' MB';

	var memoryLine = new Line()
		.padding(2)
		.column('Memory In Use', 20, [clc.cyan])
		.column(Gauge(used, total, 20, total * 0.8, human), 40)
		.fill()
		.output();

	var load = os.loadavg()[0];
	var maxLoad = os.cpus().length * 2;
	var danger = os.cpus().length;

	var loadLine = new Line()
		.padding(2)
		.column('System Load', 20, [clc.cyan])
		.column(Gauge(load, maxLoad, 20, danger, load.toString()), 40)
		.fill()
		.output();

	var uptimeLine = new Line()
		.padding(2)
		.column('Uptime', 20, [clc.cyan])
		.column(os.uptime().toString() + ' seconds', 40)
		.fill()
		.output();

	blankLine.output();

	requestSeries.push(Math.ceil((Math.random()*100)));
	requestSeries.shift();

	var requestLine = new Line()
		.padding(2)
		.column('Requests/Sec', 20, [clc.cyan])
		.column(Sparkline(requestSeries, ' reqs/sec'), 80)
		.fill()
		.output();

	errorSeries.push(Math.ceil((Math.random()*10)));
	errorSeries.shift();

	var errorLine = new Line()
		.padding(2)
		.column('Errors/Sec', 20, [clc.cyan])
		.column(Sparkline(errorSeries, ' errs/sec'), 80)
		.fill()
		.output();

	blankLine.output();

	drawTimeout = setTimeout(draw, 1000);
}

draw();

process.stdout.on('resize', function() {
	clearTimeout(drawTimeout);
	draw();
});