sync with regular mpd

app/css/elements/library.less

@@ -1,3 +1,2 @@
 cyp-library {
-	cyp-song .subtitle { display: none; }
 }

app/css/elements/song.less

@@ -13,5 +13,7 @@ cyp-song {
 
 		.subtitle { .ellipsis; }
 	}
+
+	cyp-queue & .track { display: none; }
 }
 

app/js/elements/library.js

@@ -19,7 +19,7 @@ function createEnqueueCommand(node) {
 			`sort ${SORT}`
 		].join(" ");
 	} else {
-		throw new Exception(`Cannot create enqueue command for "${node.nodeName}"`);
+		throw new Error(`Cannot create enqueue command for "${node.nodeName}"`);
 	}
 }
 

app/js/elements/song.js

@@ -5,38 +5,36 @@ import Item from "../item.js";
 export default class Song extends Item {
 	constructor(data) {
 		super();
-		this.data = data;
-		this.dataset.songId = data["Id"];
+		this.data = data; // FIXME verejne?
+		this.dataset.songId = data["Id"]; // FIXME toto maji jen ve fronte
 	}
 
 	connectedCallback() {
-		let block = html.node("div", {className:"multiline"}, "", this);
+		const data = this.data;
 
-		let lines = formatSongInfo(this.data);
-		block.appendChild(this._buildTitle(lines.shift()));
+		const block = html.node("div", {className:"multiline"}, "", this);
 
-		lines.length && html.node("span", {className:"subtitle"}, lines.shift(), block);
+		const title = this._buildTitle(data);
+		block.appendChild(title);
+		if (data["Track"]) {
+			const track = html.node("span", {className:"track"}, data["Track"].padStart(2, "0"));
+			title.insertBefore(html.text(" "), title.firstChild);
+			title.insertBefore(track, title.firstChild);
+		}
+
+		if (data["Title"]) {
+			const subtitle = format.subtitle(data);
+			html.node("span", {className:"subtitle"}, subtitle, block);
+		}
+	}
+
+	_buildTitle(data) {
+		return super._buildTitle(data["Title"] || fileName(data));
 	}
 }
 
 customElements.define("cyp-song", Song);
 
-
-// FIXME vyfaktorovat nekam do haje
-function formatSongInfo(data) {
-	let lines = [];
-
-	if (data["Title"]) {
-		lines.push(data["Title"]);
-		lines.push(format.subtitle(data));
-	} else {
-		lines.push(fileName(data));
-		lines.push("\u00A0");
-	}
-
-	return lines;
-}
-
 // FIXME vyfaktorovat nekam do haje
 function fileName(data) {
 	return data["file"].split("/").pop();

app/js/mpd.js

@@ -95,9 +95,9 @@ export async function listPath(path) {
 	return parser.pathContents(lines);
 }
 
-export async function listTags(tag, filter = null) {
+export async function listTags(tag, filter = {}) {
 	let tokens = ["list", tag];
-	if (filter) {
+	if (Object.keys(filter).length) {
 		tokens.push(serializeFilter(filter));
 
 		let fakeGroup = Object.keys(filter)[0]; // FIXME hack for MPD < 0.21.6