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audio = null;
// pre-load some icons
cache_images = new Array(
'music-cached.png',
'music-queued.png',
'loading.gif'
);
var img = new Image();
for(var i = 0; i < cache_images.length; i++) {
img.src = '/static/icons/' + cache_images[i];
}
function MusicListing(type, path, name, cached) {
this.type = type;
this.path = path;
this.name = name ? name : path.split('/').pop();
this.a = document.createElement('a');
this.a.tag = path;
this.play = function() {
log('playing ' + path);
xmlhttp = new XMLHttpRequest();
xmlhttp.open('GET', '/play?path=' + encodeURIComponent(path));
xmlhttp.send(null);
}
this.recode = function() {
var path = '/recode?path=' + encodeURIComponent(this.path) +
'&decoder=' + document.getElementById('trans_from').value +
'&encoder=' + document.getElementById('trans_to').value;
var a = this.a;
var ml = this;
var xmlhttp = new XMLHttpRequest();
a.setAttribute('class', 'file file-queued');
xmlhttp.open('GET', path);
xmlhttp.send(null);
}
this.get_anchor = function() {
var a = this.a;
var className = type;
if(cached)
className += ' file-cached'
a.setAttribute('class', className);
a.setAttribute('href', '#');
a.appendChild(document.createTextNode(this.name));
var ml = this;
a.onclick = function() {
if(type == 'dir') {
list(path);
} else if(type == 'file') {
ml.play();
}
return false;
}
return a;
}
}
function set_current(path) {
document.getElementById('current-dir').innerHTML = 'Directory: ' + path;
}
function log(s) {
logbox = document.getElementById('logbox');
logbox.value += s + '\n';
logbox.scrollTop = logbox.scrollHeight;
}
function change_url(url) {
audio.set_src(url);
var audio_src_url = document.getElementById('audio-src-url');
audio_src_url.innerHTML = 'Playing: ' + url.replace('&', '&');
}
function output_link(obj) {
var a = obj.get_anchor();
var li = document.createElement('li');
li.appendChild(a);
var song_links = document.getElementById('song-links');
song_links.appendChild(li);
}
function list(root) {
log('listing ' + root);
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if(xmlhttp.readyState == 4) {
set_current(root);
var json = JSON.parse(xmlhttp.responseText);
document.getElementById('song-links').innerHTML = '';
// add "up" link
if(root.length > 1) {
up = root.substr(0, root.lastIndexOf('/'));
if(up.length == 0)
up = '/';
l = new MusicListing('dir', up, '..');
output_link(l);
}
for(var i = 0; i < json.length; i++) {
var type = json[i]["type"];
var path = json[i]["name"];
var name = path.substring(path.lastIndexOf('/')+1);
var cached = type == "file" ? json[i]["cached"] : false;
var l = new MusicListing(type, path, name, cached);
output_link(l);
}
}
}
path = '/list?directory=' + encodeURIComponent(root);
xmlhttp.open('GET', path);
xmlhttp.send();
}
var source = null;
function get_a(path) {
var as = document.getElementsByTagName('a');
for(var i = 0; i < as.length; i++) {
var a = as[i];
if(a.tag == path)
return a;
}
}
function event_handler(event) {
data = JSON.parse(event.data);
switch(data['type']) {
case 'cached':
case 'recoding':
log('[' + data['type'] + '] ' + data['path']);
var a = get_a(data['path']);
if(a)
a.setAttribute('class', 'file file-' + data['type']);
break;
case 'play':
log('[play] ' + data['path']);
change_url(data['path']);
audio.play();
break;
default:
log('[event] unknown type: ' + data['type']);
}
}
function event_open() {
if(source)
source.close();
source = new EventSource('/events');
source.onopen = function() { log('event source opened'); }
source.onmessage = event_handler;
source.onerror = function(event) { log('event source error'); }
log('event source status: ' + source.readyState);
}
window.onload = function() {
event_open();
audio = new Audio();
list('/');
}
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