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/*
* Pointless Viewer, a web-based Beamer presentation viewer
* Copyright (C) 2018 Pacien TRAN-GIRARD
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
"use strict";
// script put at the root of the app so it can intercept all requests made from the current directory.
class AppCache {
constructor() {
this.cacheName = "cache";
this.filesToCache = [
".",
"popup.html",
"appcache.js",
"favicon.ico",
"sample/demo.pdf",
"pointless/pdfjs/pdf.js",
"pointless/pdfjs/pdf.worker.js",
"pointless/viewer/viewer.css",
"pointless/viewer/init.js",
"pointless/viewer/viewer.js",
"pointless/viewer/presentation.js",
"pointless/viewer/stage/stage.js",
"pointless/viewer/stage/actions.js",
"pointless/viewer/screen/screen.js",
"pointless/viewer/screen/timer.js"
];
self.addEventListener("install", event => event.waitUntil(this.onInstall()));
self.addEventListener("fetch", event => event.respondWith(this.onFetch(event.request)));
}
onInstall() {
return caches.open(this.cacheName)
.then(cache => cache.addAll(this.filesToCache));
}
onFetch(request) {
return caches.open(this.cacheName)
.then(cache => this._serve(cache, request));
}
_serve(cache, request) {
return cache.match(request).then(cachedResponse => {
const update = this._fetchUpdate(cache, request);
return cachedResponse || update;
});
}
_fetchUpdate(cache, request) {
return fetch(request).then(networkResponse => {
cache.put(request, networkResponse.clone());
return networkResponse;
});
}
}
const appCache = new AppCache();
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