93 lines
2.9 KiB
JavaScript
93 lines
2.9 KiB
JavaScript
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(function initAutoUpgrade () {
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// Prevent click-jacking
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try {
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if (window == window.top || window.chrome && chrome.app && chrome.app.window) {
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document.documentElement.style.display = 'block';
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} else {
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top.location = self.location;
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}
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} catch (e) {console.error('CJ protection', e)};
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window.safeConfirm = function (params, callback) {
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if (typeof params === 'string') {
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params = {message: params};
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}
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var result = false
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try {
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result = confirm(params.message);
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} catch (e) {
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result = true;
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}
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setTimeout(function () {callback(result)}, 10);
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};
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if ((!navigator.serviceWorker && !window.applicationCache) || Config.Modes.packed || !window.addEventListener) {
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return;
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}
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var declined = false;
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function updateFound() {
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if (!declined) {
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safeConfirm({type: 'WEBOGRAM_UPDATED_RELOAD', message: 'A new version of Webogram is downloaded. Launch it?'}, function (result) {
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if (result) {
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window.location.reload();
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} else {
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declined = true;
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}
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});
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}
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}
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if (navigator.serviceWorker) {
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// If available, use a Service Worker to handle offlining.
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navigator.serviceWorker.register('offline-worker.js').then(function(registration) {
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console.log('offline worker registered');
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registration.addEventListener('updatefound', function() {
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var installingWorker = this.installing;
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// Wait for the new service worker to be installed before prompting to update.
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installingWorker.addEventListener('statechange', function() {
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switch (installingWorker.state) {
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case 'installed':
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// Only show the prompt if there is currently a controller so it is not
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// shown on first load.
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if (navigator.serviceWorker.controller) {
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updateFound();
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}
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break;
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case 'redundant':
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console.error('The installing service worker became redundant.');
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break;
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}
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});
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});
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});
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} else {
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// Otherwise, use AppCache.
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var appCache = window.applicationCache,
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updateTimeout = false,
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scheduleUpdate = function (delay) {
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clearTimeout(updateTimeout);
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updateTimeout = setTimeout(function () {
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try {
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appCache.update();
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} catch (ex) {
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console.log('appCache.update: ' + ex);
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}
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}, delay || 300000);
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};
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scheduleUpdate(3000);
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window.addEventListener('load', function () {
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appCache.addEventListener('updateready', function () {
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if (appCache.status == appCache.UPDATEREADY) {
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updateFound();
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}
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}, false);
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appCache.addEventListener('noupdate', function () {scheduleUpdate()}, false);
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appCache.addEventListener('error', function () {scheduleUpdate()}, false);
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});
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}
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})();
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