131 lines
3.5 KiB
JavaScript
131 lines
3.5 KiB
JavaScript
import MPD from "../mpd.js";
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import * as html from "../html.js";
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function initIcons() {
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Array.from(document.querySelectorAll("[data-icon]")).forEach(/** @param {HTMLElement} node */ node => {
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node.dataset.icon.split(" ").forEach(name => {
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let icon = html.icon(name);
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node.insertBefore(icon, node.firstChild);
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})
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});
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}
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class App extends HTMLElement {
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static get observedAttributes() { return ["component"]; }
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constructor() {
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super();
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initIcons();
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}
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async connectedCallback() {
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await waitForChildren(this);
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window.addEventListener("hashchange", e => this._onHashChange());
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this._onHashChange();
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await this._connect();
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this.dispatchEvent(new CustomEvent("load"));
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this.mediaSessionInit = false;
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this._initMediaHandler();
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}
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attributeChangedCallback(name, oldValue, newValue) {
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switch (name) {
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case "component":
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location.hash = newValue;
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const e = new CustomEvent("component-change");
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this.dispatchEvent(e);
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break;
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}
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}
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get component() { return this.getAttribute("component"); }
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set component(component) { this.setAttribute("component", component); }
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_onHashChange() {
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const component = location.hash.substring(1) || "queue";
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if (component != this.component) { this.component = component; }
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}
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_onChange(changed) { this.dispatchEvent(new CustomEvent("idle-change", {detail:changed})); }
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_onClose(e) {
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setTimeout(() => this._connect(), 3000);
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}
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async _connect() {
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const attempts = 3;
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for (let i=0;i<attempts;i++) {
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try {
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let mpd = await MPD.connect();
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mpd.onChange = changed => this._onChange(changed);
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mpd.onClose = e => this._onClose(e);
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this.mpd = mpd;
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return;
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} catch (e) {
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await sleep(500);
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}
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}
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alert(`Failed to connect to MPD after ${attempts} attempts. Please reload the page to try again.`);
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}
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_initMediaHandler() {
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// check support mediaSession
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if (!('mediaSession' in navigator)) {
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console.log('mediaSession is not supported');
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return;
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}
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// DOM (using media session controls are allowed only if there is audio/video tag)
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const audio = html.node("audio", {loop: true}, "", this);
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html.node("source", {src: 'https://raw.githubusercontent.com/anars/blank-audio/master/10-seconds-of-silence.mp3'}, '', audio);
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// Init event session (play audio) on click (because restrictions by web browsers)
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window.addEventListener('click', () => {
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if (!this.mediaSessionInit) {
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audio.play();
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this.mediaSessionInit = true;
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}
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});
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// mediaSession define metadata
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navigator.mediaSession.metadata = new MediaMetadata({
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title: 'Control Your Player'
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});
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// mediaSession define action handlers
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navigator.mediaSession.setActionHandler('play', () => {
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this.mpd.command("play")
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audio.play()
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});
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navigator.mediaSession.setActionHandler('pause', () => {
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this.mpd.command("pause 1")
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audio.pause()
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});
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navigator.mediaSession.setActionHandler('previoustrack', () => {
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this.mpd.command("previous")
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audio.play()
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});
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navigator.mediaSession.setActionHandler('nexttrack', () => {
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this.mpd.command("next")
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audio.play()
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});
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}
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}
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customElements.define("cyp-app", App);
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function sleep(ms) { return new Promise(resolve =>setTimeout(resolve, ms)); }
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function waitForChildren(app) {
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const children = Array.from(app.querySelectorAll("*"));
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const names = children.map(node => node.nodeName.toLowerCase())
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.filter(name => name.startsWith("cyp-"));
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const unique = new Set(names);
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const promises = [...unique].map(name => customElements.whenDefined(name));
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return Promise.all(promises);
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}
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