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path: root/static/playlist.js
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function Playlist(pl, audio) {
	this.pl = pl;
	this.audio = audio;
	this.current = null;
	this.lastalbum = null;

	this.get = function(path, track) {
		var li = this.pl.getElementsByTagName('li')[0];
		while(li) {
			var as = li.getElementsByTagName('a');
			if(as.length > 0) {
				var a = as[0];
				if(a.ml.path == path && (!track || a.ml.track == track))
					return li;
			}
			li = li.nextElementSibling;
		}
		return null;
	}

	this.add = function(ml) {
		var a = document.createElement('a');
		a.setAttribute('href', '#');
		var name = ml.get_text();
		a.appendChild(document.createTextNode(name));
		a.ml = ml;
		var li = document.createElement('li');
		var pl = this;
		a.onclick = function() {
			while(li.previousElementSibling && li.previousElementSibling.getAttribute('class') != 'album')
				li.previousElementSibling.parentElement.removeChild(li.previousElementSibling);
			// Remove children above the album marker.
			// This could probably be done in a more elegant way.
			if(li.previousElementSibling && li.previousElementSibling.previousElementSibling)
				while(li.previousElementSibling.previousElementSibling)
					li.previousElementSibling.previousElementSibling.parentElement.removeChild(li.previousElementSibling.previousElementSibling);
			if(li.previousElementSibling && pl.pl.firstChild != li.previousElementSibling)
				pl.pl.removeChild(pl.pl.firstChild);
			a.setAttribute('class', 'playing');
			pl.current = li;
			ml.play();

			var nextsong = li.nextElementSibling;
			log('nextsong: ' + nextsong);
			// avoid breaking when a track has been removed
			while(nextsong && nextsong.childElementCount == 0)
				nextsong = nextsong.nextElementSibling;
			if(nextsong) {
				var nexta = nextsong.getElementsByTagName('a')[0];
				log('nexta: ' + nexta);
				log(nexta.onclick);
				log('next ml: ' + nexta.ml);
				nexta.ml.recode();
			}

			return false;
		}
		log(a.click);

		if(ml.metadata.album != this.lastalbum) {
			var album_li = document.createElement('li');
			album_li.appendChild(document.createTextNode(ml.metadata.album));
			album_li.setAttribute('class', 'album');

			this.pl.appendChild(album_li);
			this.lastalbum = ml.metadata.album;
		}

		var span = document.createElement('div');

		// anchor to remove track from playlist
		var a_del = document.createElement('a');
		a_del.setAttribute('class', 'delete');
		a_del.setAttribute('href', '#');
		a_del.setAttribute('title', 'Remove');
		var del_img = new Image();
		del_img.src = '/static/icons/delete.png';
		a_del.appendChild(del_img);
		a_del.onclick = function() {
			log(li.previousElementSibling);
			log(li.nextElementSibling);
			if(li.previousElementSibling && li.previousElementSibling.getAttribute('class') == 'album'
					&& (!li.nextElementSibling || li.nextElementSibling.getAttribute('class') == 'album'))
				pl.pl.removeChild(li.previousElementSibling);
			pl.pl.removeChild(li);
			if(pl.pl.childElementCount == 0)
				pl.lastalbum = null;
			return false;
		}
		a_del.hidden = true;

		span.onmouseover = function() {
			a_del.hidden = false;
		}
		span.onmouseout = function() {
			a_del.hidden = true;
		}

		span.appendChild(a);
		span.appendChild(document.createTextNode(' '));
		span.appendChild(a_del);

		li.appendChild(span);
		this.pl.appendChild(li);

		if(this.pl.firstChild == li || (this.current && this.current.nextElementSibling == li)
				|| (this.pl.firstChild.getAttribute('class') == 'album' && this.pl.firstChild.nextElementSibling == li))
			ml.recode();
	}

	this.next = function() {
		log('next');
		log('this: ' + this);
		log('current: ' + this.current);
		if(this.current) {
			var old = this.current;
			log('old: ' + old);
			this.current = this.current.nextElementSibling;
			log('new current: ' + this.current);
			old.parentElement.removeChild(old);
		}
		// avoid breaking when a track has been removed
		while(this.current && this.current.childElementCount == 0)
			this.current = this.current.nextElementSibling;
		if(this.current) {
			var a = this.current.getElementsByTagName('a')[0];
			a.onclick();
		} else {
			this.lastalbum = null;
			this.pl.removeChild(this.pl.firstChild);
		}
	}
}