webmusic.js: navigate through files more smartly

webmusic.js

@@ -1,7 +1,6 @@
 let gstate = "idle";
 let repeat = false;
 let continuelist = true;
-let queue = [];
 let total = 0;
 let index = 0;
 
@@ -25,7 +24,7 @@ window.onkeyup = function (event) {
 		case " ":
 		case "p":
 			if (gstate == "idle" && total !== 0) {
-				playSong(queue[0])
+				playSong(index)
 			} else {
 				togglePlayback();
 			}
@@ -65,6 +64,28 @@ window.onkeyup = function (event) {
 	}
 };
 
+function initState() {
+	const dirElements  = document.querySelectorAll(".dir");
+	const fileElements = document.querySelectorAll(".file");
+
+	let id = 0;
+
+	dirElements.forEach(function(element){
+		element.id = id++;
+	});
+
+	fileElements.forEach(function(element){
+		element.id = id++;
+
+		element.addEventListener("click", function(event) {
+			event.preventDefault();
+			event.stopPropagation();
+			playSong(event.target.id);
+		});
+	});
+
+	total = id;
+}
 
 function togglePlayback() {
 	if (sound.playing()) {
@@ -82,19 +103,25 @@ function setState(state) {
 }
 
 
-function playSong(url) {
+function playSong(id) {
+	let element = document.getElementById(id);
+
+	if (element === null) return;
+	if (element.classList.contains('dir')) return;
+
 	if (document.getElementsByClassName("playing").length > 0) {
 		document.getElementsByClassName("playing")[0].classList.remove("playing");
 	}
 
-	index = queue.indexOf(url);
+	index = element.id;
+
 	sound.stop();
 	sound.unload();
 	sound = null;
 	delete sound;
 
 	sound = new Howl({
-		src: [url],
+		src: [element.href],
 		html5: true
 	});
 
@@ -102,7 +129,7 @@ function playSong(url) {
 	sound.play();
 	sound.loop(repeat);
 	
-	document.querySelectorAll('[onclick="playSong(\''+url+'\')"]')[0].classList.add("playing");
+	element.classList.add("playing");
 
 	sound.on("play", function () {
 		setState("playing");
@@ -157,15 +184,11 @@ function updateState() {
 	document.getElementById("flags").innerHTML = flags + "]";
 }
 
-function initState() {
-	total = queue.length;
-}
-
 function previousTrack() {
 	if (index-- === 0) index = total-1;
 
 	if (continuelist) {
-		playSong(queue[index])
+		playSong(index)
 	}
 }
 
@@ -173,7 +196,7 @@ function nextTrack() {
 	if (++index === total) index = 0;
 
 	if (continuelist) {
-		playSong(queue[index])
+		playSong(index)
 	}
 }