Perfect Albums Queue

album.js

var Queue = function (list) {
	this.list = [].concat(list);
};

Queue.prototype = {
	constructor: Queue,

	random: function () {
		var length = this.list.length;
		var index = -1;
		var item;

		while (length && !(item = this.list[index])) {
			index = Math.round(Math.random() * length);
		}

		return item;
	}
};

var Albums = function (file, callback) {
	this.callback = callback;
	this.albums = [];
	this.queue = null;
	this.zeroMessage = "So sad, too bad, no favs :(";

	this.onLoad = this.onLoad.bind(this);
	this.load(file);
};

Albums.prototype = {
	constructor: Albums,

	load: function (file) {
		var fs = require("fs");
		var path = require("path");

		fs.readFile(path.resolve(__dirname, file), this.onLoad);
	},

	onLoad: function (err, data) {
		if (err) throw err;

		var text = String(data).trim();

		if (data && text.length) {
			this.albums = data && text.split("\n");
			this.queue = new Queue(this.albums);
		}

		this.callback && this.callback(this);
	},

	random: function () {
		var album = this.queue.random();

		return album || this.zeroMessage;
	}
};

var albums = new Albums("albums.txt", function (albums) {
	console.log("Play... ", albums.random());
});

album.sh

node album.js

albums.txt

Aaliyah - Aaliyah
Adele - 21
Air - Virgin Suicides
Alanis Morissette - Jagged Little Pill
Amy Winehouse - Back to Black
Arcade Fire - Funeral
Aretha Franklin - The Very Best of Aretha Franklin
Beach Boys - Pet Sounds
Bebel Gilberto - Bebel Gilberto
Bjork - Homogenic
Carole King - Tapestry
Coldplay - A Rush of Blood to the Head
Coldplay - Parachutes
David Gray - White Ladder
Death Cab for Cutie - Plans
Diana Krall - The Look of Love
Diana Ross & The Supremes - The Ultimate Collection
Ed Sheeran - +
Erykah Badu - Mama's Gun
Fiona Apple - Tidal
Fleet Foxes - Fleet Foxes
Fleetwood Mac - The Dance
George Michael - Faith
Harry Connick Jr. - When Harry Met Sally Soundtrack
Incubus - Make Yourself
Janelle Monae - The Archandroid
Jay-Z - The Black Album
Jewel - Pieces of You
Jill Scott - Who Is Jill Scott?
Jimmy Eat World - Bleed American
John Mayer - Room for Squares
Justice - Cross
Justin Timberlake - Justified
Kelly Clarkson - Breakaway
LCD Soundsystem - Sound of Silver
Lauryn Hill - The Miseducation of Lauryn Hill
Mariah Carey - Mariah Carey
Natalie Imbruglia - White Lillies Island
Nick Drake - Pink Moon
Nirvana - In Utero
Phoenix - Wolfgang Amadeus Phoenix
Poe - Haunted
Radiohead - In Rainbows
Radiohead - OK Computer
Rent
Starsailor - Love Is Here
Stevie Wonder - Songs in the Key of Life
Sufjan Stevens - Come On Feel The Illinoise!
Tears for Fears - Tears Roll Down
Third Eye Blind - Third Eye Blind
Thom Yorke - The Eraser
Tool - Lateralus
Travis - The Invisible Band
U2 - The Joshua Tree
Vampire Weekend - Vampire Weekend
Wilco - Yankee Hotel Foxtrot