80 lines
1.7 KiB
JavaScript
80 lines
1.7 KiB
JavaScript
const CACHE_NAME = 'gottesdienste-app';
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const ASSETS = [
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'/',
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'/static/app.css',
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'/static/app.js',
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'/static/gallery.css',
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'/static/gallery.js',
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'/static/audioplayer.css',
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'/static/audioplayer.js',
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'/icon/logo-192x192.png',
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'/icon/logo-300x300.png',
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'/icon/logo-512x512.png',
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'/custom_logo/logoB.png',
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'/custom_logo/logoW.png'
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];
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self.addEventListener('install', evt => {
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self.skipWaiting();
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evt.waitUntil(
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caches.open(CACHE_NAME)
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.then(cache => cache.addAll(ASSETS))
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);
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});
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self.addEventListener('activate', evt => {
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self.clients.claim();
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evt.waitUntil(
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caches.keys().then(keys =>
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Promise.all(
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keys
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.filter(k => k !== CACHE_NAME)
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.map(k => caches.delete(k))
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)
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)
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);
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});
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const RICH_MEDIA_TYPES = ['style', 'script', 'font'];
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async function networkFirst(request) {
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const cache = await caches.open(CACHE_NAME);
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try {
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const fresh = await fetch(request);
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cache.put(request, fresh.clone());
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return fresh;
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} catch (err) {
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const cached = await cache.match(request);
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if (cached) return cached;
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throw err;
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}
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}
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async function cacheFirst(request) {
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const cache = await caches.open(CACHE_NAME);
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const cached = await cache.match(request);
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if (cached) return cached;
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const fresh = await fetch(request);
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cache.put(request, fresh.clone());
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return fresh;
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}
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self.addEventListener('fetch', evt => {
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const { request } = evt;
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if (request.method !== 'GET') return;
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if (request.mode === 'navigate') {
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evt.respondWith(
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fetch(request).catch(() => caches.match('/'))
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);
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return;
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}
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if (RICH_MEDIA_TYPES.includes(request.destination)) {
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evt.respondWith(networkFirst(request));
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return;
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}
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evt.respondWith(cacheFirst(request));
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});
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