var httpRequest
function navigate(item) {
	if (/\..{3,5}$/.test(item)) {
		change_track(item);
	}
	else {
		get_dir(item);
	}
}

function change_track(item) {
	let cd = document.getElementById('currentDirectory').innerText;
	let track = cd + item;
	let source = document.getElementById('stream');
	source.src = '/musik/stream' + track;
	let player = document.getElementById('player');
	player.load();
	player.play();
	document.getElementById('nowPlaying').innerHTML = track;
}

function get_dir(item) {
	let cd = document.getElementById('currentDirectory').innerText;
	item = cd + item;
	item = item.replace(/\.\./g, 'DOTDOT');
	httpRequest = new XMLHttpRequest();
	httpRequest.onreadystatechange = update_nav_items;
	httpRequest.open('GET', '/musik/get_dir' + item, true);
	httpRequest.send();
}

function update_nav_items() {
	if (httpRequest.readyState !== XMLHttpRequest.DONE) { return; }
	if (httpRequest.status !== 200) { return; }
	nav_items = JSON.parse(httpRequest.responseText);
	document.getElementById('currentDirectory').innerText = nav_items.shift();
	let html_str = '';
	for (let i = 0; i < nav_items.length; i++) {
		html_str += '<li><a href="javascript:void(0);" onclick="navigate(\'' + nav_items[i] + '\')">' + nav_items[i] + '</a></li>';
	}
	document.getElementById('navItems').innerHTML = html_str;
}