archive.js

/*
 * Chrome-Last.fm-Scrobbler archive.org Connector by Malachi Soord
 *                (based on George Pollard's bandcamp connctor)
 * v0.1
 */
'use strict';

var lastTrack = null;

$(function () {
	// bind page unload function to discard current "now listening"
	cancel();
});

var durationElapsed = '#jw6_controlbar_elapsed';
var durationTotal = '#jw6_controlbar_duration';
var durationRegex = /(\d+):(\d+)/;

function parseDuration(elapsed, total) {
	try {
		var mEla = durationRegex.exec(elapsed);
		var mTot = durationRegex.exec(total);
		return {
			current: parseInt(mEla[1], 10) * 60 + parseInt(mEla[2], 10),
			total: parseInt(mTot[1], 10) * 60 + parseInt(mTot[2], 10)
		};
	} catch (err) {
		return 0;
	}
}

function parseArtist() {
	return $('span.key:contains("Artist/Composer:"), span.key:contains("Band/Artist:")').next().text();
}

function parseTitle() {

	// Get title directly from player
	var title = $('.playing > .ttl').text();

	// Some titles are stored as artist - track # - title so strip out non-title elements
	var parts = title.split('-');
	if (parts.length === 3 && parts[0].trim() === parseArtist()) {
		title = parts[2].trim();
	}

	return title;
}

function parseAlbum() {
	var album = $('.x-archive-meta-title').text();

	// Remove artist from album
	var parts = album.split('-');
	if (parts.length > 0 && parts[0].trim() === parseArtist()) {
		album = album.substr(album.indexOf('-') + 1).trim();
	}

	return album;
}

function cancel() {
	$(window).unload(function () {
		// reset the background scrobbler song data
		chrome.runtime.sendMessage({
			type: 'reset'
		});
		return true;
	});
}

// console.log('Archive.org: loaded');

$(durationElapsed).live('DOMSubtreeModified', function () {

	var duration = parseDuration($(durationElapsed).text(), $(durationTotal).text());

	// console.log('duration - ' + duration.current + ' / ' + duration.total);

	if (duration.current > 0) { // it's playing

		var artist = parseArtist();
		var track = parseTitle();
		var album = parseAlbum();

		if (lastTrack !== track) {
			lastTrack = track;

			console.log('Archive.org: scrobbling - Artist: ' + artist + '; Album:  ' + album + '; Track: ' + track + '; duration: ' + duration.total);
			chrome.runtime.sendMessage({
				type: 'validate',
				artist: artist,
				track: track
			}, function (response) {
				if (response !== false) {
					chrome.runtime.sendMessage({
						type: 'nowPlaying',
						artist: response.artist,
						track: response.track,
						duration: duration.total,
						album: album
					});
				} else {
					chrome.runtime.sendMessage({
						type: 'nowPlaying',
						duration: duration.total
					});
				}
			});
		}
	}
});