Alexander Heldt
76 lines
1.9 KiB
JavaScript
76 lines
1.9 KiB
JavaScript
const CACHE = "puppy-tracker-v4";
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const PHOTO_CACHE = "puppy-tracker-photos-v1";
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const ASSETS = [
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"./",
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"./index.html",
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"./style.css",
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"./app.js",
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"./manifest.json",
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"./icon.svg",
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];
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self.addEventListener("install", (event) => {
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event.waitUntil(
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caches.open(CACHE).then((cache) => cache.addAll(ASSETS))
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);
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self.skipWaiting();
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});
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self.addEventListener("activate", (event) => {
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event.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 && k !== PHOTO_CACHE)
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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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self.clients.claim();
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});
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self.addEventListener("fetch", (event) => {
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const req = event.request;
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if (req.method !== "GET") return;
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const url = new URL(req.url);
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// Photos are immutable per UUID — cache-first forever and stuff every
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// successful fetch into a dedicated cache so they survive between visits
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// and are available offline once seen.
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if (url.pathname.includes("/api/photos/")) {
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event.respondWith(
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caches.open(PHOTO_CACHE).then(async (cache) => {
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const cached = await cache.match(req);
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if (cached) return cached;
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try {
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const res = await fetch(req);
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if (res && res.ok) cache.put(req, res.clone());
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return res;
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} catch (err) {
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return cached || Response.error();
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}
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})
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);
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return;
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}
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// Other API calls: never cache — sync must reflect live server state.
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if (url.pathname.includes("/api/")) return;
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event.respondWith(
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caches.match(req).then((cached) => {
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if (cached) return cached;
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return fetch(req)
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.then((res) => {
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if (res && res.ok && url.origin === self.location.origin) {
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const clone = res.clone();
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caches.open(CACHE).then((c) => c.put(req, clone));
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}
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return res;
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})
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.catch(() => caches.match("./index.html"));
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})
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);
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});
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