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/*
* Beamer Viewer, a web-based PDF presentation viewer
* Copyright 2018-2024 Euxane TRAN-GIRARD
* SPDX-License-Identifier: EUPL-1.2
*/
"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 = [
".",
"appcache.js",
"favicon.ico",
"sample/demo.pdf",
"beamer/pdfjs/pdf.js",
"beamer/pdfjs/pdf.worker.js",
"beamer/viewer/viewer.css",
"beamer/viewer/init.js",
"beamer/viewer/viewer.js",
"beamer/viewer/presentation.js",
"beamer/viewer/stage/stage.js",
"beamer/viewer/stage/actions.js",
"beamer/viewer/screen/screen.js",
"beamer/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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