app.js

/*  _          _ _ 
 * | |   _   _| | |
 * | |  | | | | | |
 * | |__| |_| | | |
 * |_____\__,_|_|_|
 * By: Jason Stallings
 */
 
var robot = require("robotjs");
var gui = require("nw.gui");
var async = require("async");
var loudness = require("loudness");
var appVersion = gui.App.manifest.version;

var ua = require("universal-analytics");
var visitor = ua("UA-67011723-3");

var win = gui.Window.get();

//Pixels to check for ad.
var adPixels = [[25, 22], [24, 23], [27, 19], [28, 21], [31, 23], [33, 24]];
var screenSize = robot.getScreenSize();
var middle = screenSize.width/2;

var start;

//Create tray.
var tray = new gui.Tray(
{
	icon: "tray.png",
	iconsAreTemplates: false
});

//Give it a menu.
var menu = new gui.Menu();
menu.append(new gui.MenuItem(
{
	label: "v" + appVersion
}));

menu.append(new gui.MenuItem(
{
	type: "separator"
}));
menu.append(new gui.MenuItem(
{
	label: "Exit",
	click: function()
	{
		gui.App.quit();
	},
}));
tray.menu = menu;

//Muted state.
var alreadyMuted = 0;

//App Start.
visitor.event("App event", "App opened").send();

scan();
setInterval(scan, 1000);

//Check to see if ad is playing using screen reading.
function scan()
{
	//Array of tasks for async parallel. 
	var tasks = [];
	
	//Loop through adPixels array.
	for (var x in adPixels)
	{
		//Closure to keep value of x.
		(function(x) 
		{
			tasks.push(function(done)
			{
				var hex = robot.getPixelColor(adPixels[x][0], adPixels[x][1]);
				
				//If hex is 000000, return true.
				var pass = hex === "ededed" ? true : false;
				done(null, pass);
			});
		}(x));
	}
	
	//Special check, make sure the whole screen isn't ededed.
	tasks.push(function(done)
	{
		var hex = robot.getPixelColor(middle, 1);
		
		//If hex is ededed, return false.
		var pass = hex === "ededed" ? false : true;
		done(null, pass);
	});
	
	async.parallel(tasks, function(err, results)
	{
		//If false isn't found, ad must be playing.
		if (results.indexOf(false) == -1)
		{
			//If not muted, mute it!
			loudness.getMuted(function (err, mute) 
			{
				if (!mute && !alreadyMuted)
				{
					loudness.setMuted(true, function(err) {});
                    alreadyMuted  = 1;
                    
                    visitor.event("App event", "Muted ad").send();
                    start = new Date().getTime();
				}
			});
		}
		else 
		{
			//If muted, unmute it!
			loudness.getMuted(function (err, mute) 
			{
				if (mute && alreadyMuted)
				{
					loudness.setMuted(false, function(err) {});
                    
                    var end = new Date().getTime();
                    var time = end - start;
                    visitor.timing("App event", "Total ad length", time).send();
				}
                alreadyMuted = 0;
			});
		}
	});
}