102 lines
2.4 KiB
JavaScript
102 lines
2.4 KiB
JavaScript
const CACHE_NAME = "v1";
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async function cacheResources() {
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const cache = await caches.open(CACHE_NAME);
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await cache.addAll([
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"/",
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"/style.css",
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"/vendored/qunit-2.25.0.js",
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"/vendored/material-icons.css",
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"/vendored/normalize-8.0.1.css",
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"/vendored/qunit-2.25.0.css",
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"/vendored/mithril-2.3.8.js",
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"/vendored/material-icons.ttf",
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"/index.js",
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"/models/round.js",
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"/models/round_result.js",
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"/models/game_rules.js",
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"/models/game.js",
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"/models/session.js",
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"/data/db.js",
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"/data/session_repo.js",
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"/ui/info_view.js",
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"/ui/round.js",
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"/ui/session_list.js",
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"/ui/field.css",
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"/ui/game.js",
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"/ui/session-list.css",
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"/ui/round.css",
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"/ui/session.js",
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"/ui/box.css",
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"/ui/layout.js",
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"/ui/session_head.js",
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"/ui/base_view.js",
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"/ui/button.css",
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"/ui/session-view.css",
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"/ui/layout.css",
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"/ui/splash.css",
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]);
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}
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function isStale(response) {
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let date = response.headers.get("Date");
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if (date === null)
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return true;
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date = new Date(date);
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date.setTime(date.getTime() + 60 * 60 * 1000);
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return date <= new Date();
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}
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async function revalidateIndex() {
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const index = await caches.match("/");
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if (!index || isStale(index))
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await cacheResources();
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}
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async function getFromCache(request, event) {
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const response = await caches.match(request);
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if (!response)
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return null;
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if (isStale(response))
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event.waitUntil(getFromNetwork(request, event));
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return response;
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}
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async function putInCache(request, response) {
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const cache = await cache.open(CACHE_NAME);
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await cache.put(request, response);
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}
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async function getFromNetwork(request, event) {
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const response = await fetch(request);
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event.waitUntil(putInCache(request, response.clone()));
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return response;
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}
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async function getResponse(request, event) {
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const cached = await getFromCache(request, event);
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if (cached)
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return cached;
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try {
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const fetched = await getFromNetwork(request, event);
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return fetched;
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} catch {
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const index = await getFromCache("/");
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if (index)
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return index;
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return new Response("Irgendwas is komplett faul", { status: 500 });
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}
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}
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self.addEventListener("install", (event) => {
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event.waitUntil(cacheResources());
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});
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self.addEventListener("fetch", (event) => {
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event.waitUntil(revalidateIndex());
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event.respondWith(getResponse(event.request, event));
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})
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