Add support for Web notifications
Omar Roth
6 years ago
parent
b3788bc143
commit
0338fd42e1
@ -0,0 +1,139 @@
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var notifications, delivered;
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function get_subscriptions(callback, failures) {
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if (failures >= 10) {
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return
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}
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var xhr = new XMLHttpRequest();
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xhr.responseType = 'json';
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xhr.timeout = 20000;
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xhr.open('GET', '/api/v1/auth/subscriptions', true);
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xhr.send(null);
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xhr.onreadystatechange = function () {
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if (xhr.readyState === 4) {
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if (xhr.status === 200) {
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subscriptions = xhr.response;
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callback(subscriptions);
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} else {
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console.log('Pulling subscriptions failed... ' + failures + '/10');
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get_subscriptions(callback, failures++)
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}
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}
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}
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xhr.ontimeout = function () {
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console.log('Pulling subscriptions failed... ' + failures + '/10');
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get_subscriptions(callback, failures++);
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}
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}
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function create_notification_stream(subscriptions) {
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notifications = new SSE(
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'/api/v1/auth/notifications?fields=videoId,title,author,authorId,publishedText,published,authorThumbnails,liveNow', {
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withCredentials: true,
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payload: 'topics=' + subscriptions.map(function (subscription) { return subscription.authorId }).join(','),
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headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
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});
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delivered = [];
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var start_time = Math.round(new Date() / 1000);
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notifications.onmessage = function (event) {
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if (!event.id) {
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return
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}
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var notification = JSON.parse(event.data);
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console.log('Got notification:', notification);
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if (start_time < notification.published && !delivered.includes(notification.videoId)) {
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if (Notification.permission === 'granted') {
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var system_notification =
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new Notification((notification.liveNow ? notification_data.live_now_text : notification_data.upload_text).replace('`x`', notification.author), {
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body: notification.title,
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icon: '/ggpht' + new URL(notification.authorThumbnails[2].url).pathname,
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img: '/ggpht' + new URL(notification.authorThumbnails[4].url).pathname,
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tag: notification.videoId
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});
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system_notification.onclick = function (event) {
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window.open('/watch?v=' + event.currentTarget.tag, '_blank');
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}
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}
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delivered.push(notification.videoId);
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localStorage.setItem('notification_count', parseInt(localStorage.getItem('notification_count') || '0') + 1);
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var notification_ticker = document.getElementById('notification_ticker');
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if (parseInt(localStorage.getItem('notification_count')) > 0) {
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notification_ticker.innerHTML =
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'<span id="notification_count">' + localStorage.getItem('notification_count') + '</span> <i class="icon ion-ios-notifications"></i>';
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} else {
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notification_ticker.innerHTML =
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'<i class="icon ion-ios-notifications-outline"></i>';
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}
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}
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}
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notifications.onerror = function (event) {
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console.log('Something went wrong with notifications, trying to reconnect...');
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notifications.close();
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get_subscriptions(create_notification_stream);
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}
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notifications.ontimeout = function (event) {
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console.log('Something went wrong with notifications, trying to reconnect...');
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notifications.close();
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get_subscriptions(create_notification_stream);
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}
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notifications.stream();
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}
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window.addEventListener('storage', function (e) {
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if (e.key === 'stream' && !e.newValue) {
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if (notifications) {
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localStorage.setItem('stream', true);
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} else {
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setTimeout(function () {
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if (!localStorage.getItem('stream')) {
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get_subscriptions(create_notification_stream);
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localStorage.setItem('stream', true);
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}
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}, Math.random() * 1000 + 10);
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}
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} else if (e.key === 'notification_count') {
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var notification_ticker = document.getElementById('notification_ticker');
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if (parseInt(e.newValue) > 0) {
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notification_ticker.innerHTML =
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'<span id="notification_count">' + e.newValue + '</span> <i class="icon ion-ios-notifications"></i>';
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} else {
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notification_ticker.innerHTML =
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'<i class="icon ion-ios-notifications-outline"></i>';
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}
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}
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});
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window.addEventListener('load', function (e) {
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localStorage.setItem('notification_count', document.getElementById('notification_count') ? document.getElementById('notification_count').innerText : '0');
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if (localStorage.getItem('stream')) {
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localStorage.removeItem('stream');
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} else {
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setTimeout(function () {
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if (!localStorage.getItem('stream')) {
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get_subscriptions(create_notification_stream);
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localStorage.setItem('stream', true);
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}
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}, Math.random() * 1000 + 10);
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}
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});
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window.addEventListener('unload', function (e) {
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if (notifications) {
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localStorage.removeItem('stream');
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}
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});
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@ -0,0 +1,200 @@
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/**
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* Copyright (C) 2016 Maxime Petazzoni <maxime.petazzoni@bulix.org>.
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* All rights reserved.
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*/
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var SSE = function (url, options) {
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if (!(this instanceof SSE)) {
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return new SSE(url, options);
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}
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this.INITIALIZING = -1;
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this.CONNECTING = 0;
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this.OPEN = 1;
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this.CLOSED = 2;
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this.url = url;
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options = options || {};
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this.headers = options.headers || {};
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this.payload = options.payload !== undefined ? options.payload : '';
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this.method = options.method || (this.payload && 'POST' || 'GET');
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this.FIELD_SEPARATOR = ':';
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this.listeners = {};
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this.xhr = null;
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this.readyState = this.INITIALIZING;
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this.progress = 0;
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this.chunk = '';
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this.addEventListener = function(type, listener) {
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if (this.listeners[type] === undefined) {
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this.listeners[type] = [];
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}
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if (this.listeners[type].indexOf(listener) === -1) {
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this.listeners[type].push(listener);
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}
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};
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this.removeEventListener = function(type, listener) {
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if (this.listeners[type] === undefined) {
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return;
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}
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var filtered = [];
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this.listeners[type].forEach(function(element) {
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if (element !== listener) {
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filtered.push(element);
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}
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});
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if (filtered.length === 0) {
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delete this.listeners[type];
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} else {
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this.listeners[type] = filtered;
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}
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};
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this.dispatchEvent = function(e) {
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if (!e) {
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return true;
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}
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e.source = this;
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var onHandler = 'on' + e.type;
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if (this.hasOwnProperty(onHandler)) {
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this[onHandler].call(this, e);
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if (e.defaultPrevented) {
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return false;
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}
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}
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if (this.listeners[e.type]) {
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return this.listeners[e.type].every(function(callback) {
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callback(e);
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return !e.defaultPrevented;
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});
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}
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return true;
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};
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this._setReadyState = function (state) {
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var event = new CustomEvent('readystatechange');
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event.readyState = state;
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this.readyState = state;
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this.dispatchEvent(event);
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};
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this._onStreamFailure = function(e) {
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this.dispatchEvent(new CustomEvent('error'));
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this.close();
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}
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this._onStreamProgress = function(e) {
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if (this.xhr.status !== 200) {
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this._onStreamFailure(e);
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return;
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}
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if (this.readyState == this.CONNECTING) {
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this.dispatchEvent(new CustomEvent('open'));
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this._setReadyState(this.OPEN);
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}
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var data = this.xhr.responseText.substring(this.progress);
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this.progress += data.length;
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data.split(/(\r\n|\r|\n){2}/g).forEach(function(part) {
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if (part.trim().length === 0) {
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this.dispatchEvent(this._parseEventChunk(this.chunk.trim()));
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this.chunk = '';
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} else {
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this.chunk += part;
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}
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}.bind(this));
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};
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this._onStreamLoaded = function(e) {
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this._onStreamProgress(e);
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// Parse the last chunk.
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this.dispatchEvent(this._parseEventChunk(this.chunk));
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this.chunk = '';
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};
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/**
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* Parse a received SSE event chunk into a constructed event object.
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*/
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this._parseEventChunk = function(chunk) {
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if (!chunk || chunk.length === 0) {
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return null;
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}
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var e = {'id': null, 'retry': null, 'data': '', 'event': 'message'};
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chunk.split(/\n|\r\n|\r/).forEach(function(line) {
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line = line.trimRight();
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var index = line.indexOf(this.FIELD_SEPARATOR);
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if (index <= 0) {
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// Line was either empty, or started with a separator and is a comment.
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// Either way, ignore.
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return;
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}
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var field = line.substring(0, index);
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if (!(field in e)) {
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return;
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}
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var value = line.substring(index + 1).trimLeft();
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if (field === 'data') {
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e[field] += value;
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} else {
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e[field] = value;
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}
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}.bind(this));
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var event = new CustomEvent(e.event);
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event.data = e.data;
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event.id = e.id;
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return event;
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};
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this._checkStreamClosed = function() {
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if (this.xhr.readyState === XMLHttpRequest.DONE) {
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this._setReadyState(this.CLOSED);
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}
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};
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this.stream = function() {
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this._setReadyState(this.CONNECTING);
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this.xhr = new XMLHttpRequest();
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this.xhr.addEventListener('progress', this._onStreamProgress.bind(this));
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this.xhr.addEventListener('load', this._onStreamLoaded.bind(this));
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this.xhr.addEventListener('readystatechange', this._checkStreamClosed.bind(this));
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this.xhr.addEventListener('error', this._onStreamFailure.bind(this));
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this.xhr.addEventListener('abort', this._onStreamFailure.bind(this));
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this.xhr.open(this.method, this.url);
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for (var header in this.headers) {
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this.xhr.setRequestHeader(header, this.headers[header]);
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}
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this.xhr.send(this.payload);
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};
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this.close = function() {
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if (this.readyState === this.CLOSED) {
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return;
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}
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this.xhr.abort();
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this.xhr = null;
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this._setReadyState(this.CLOSED);
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};
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};
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// Export our SSE module for npm.js
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if (typeof exports !== 'undefined') {
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exports.SSE = SSE;
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}
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