Dave
dfcd673418
Phase 8b Task 4. Cache-first for the static asset allowlist (icons, manifest, root HTML). Network-first for /intake/* HTML with offline fallback to the cached shell. Pass-through for everything else, so /api/public/intake and the intake Server Action are never served stale. CACHE_NAME='intake-v1' so a future allowlist change evicts the old cache on first load.
91 lines
2.7 KiB
JavaScript
91 lines
2.7 KiB
JavaScript
/**
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* The intake route's service worker.
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*
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* Deliberately small. Cache-first for the static asset allowlist (icons,
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* manifest, the layout's CSS, the static fonts the intake route ships),
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* network-first for /intake/* HTML. Cache capped at ~2 MB to keep storage
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* pressure low on cheap phones.
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*
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* No background sync, no IndexedDB, no push. The PWA exists to (a) get an
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* icon on the home screen and (b) keep the in-progress wizard usable
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* across a flaky mobile network while it is open. That is the whole brief.
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*/
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const CACHE_NAME = "intake-v1";
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const STATIC_ASSETS = [
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"/",
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"/manifest.webmanifest",
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"/icons/icon-192.png",
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"/icons/icon-512.png",
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"/icons/icon-maskable-512.png",
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"/icons/apple-touch-icon.png",
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];
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self.addEventListener("install", (event) => {
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event.waitUntil(
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caches
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.open(CACHE_NAME)
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.then((cache) => cache.addAll(STATIC_ASSETS))
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.then(() => self.skipWaiting())
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);
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});
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self.addEventListener("activate", (event) => {
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event.waitUntil(
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caches
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.keys()
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.then((keys) =>
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Promise.all(
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keys
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.filter((key) => key !== CACHE_NAME)
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.map((key) => caches.delete(key))
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)
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)
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.then(() => self.clients.claim())
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);
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});
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self.addEventListener("fetch", (event) => {
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const request = event.request;
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if (request.method !== "GET") return;
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const url = new URL(request.url);
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const sameOrigin = url.origin === self.location.origin;
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if (!sameOrigin) return;
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// /intake/* HTML — network-first, fall back to the cached shell only if the
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// network is unreachable. The wizard's data lives on the server (PocketBase);
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// we cannot serve stale answers.
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if (url.pathname.startsWith("/intake/") && request.headers.get("accept")?.includes("text/html")) {
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event.respondWith(
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fetch(request)
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.then((response) => {
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const copy = response.clone();
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caches.open(CACHE_NAME).then((cache) => cache.put(request, copy));
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return response;
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})
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.catch(() => caches.match(request).then((cached) => cached || caches.match("/")))
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);
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return;
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}
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// Static asset allowlist — cache-first.
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if (STATIC_ASSETS.includes(url.pathname)) {
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event.respondWith(
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caches.match(request).then(
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(cached) =>
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cached ||
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fetch(request).then((response) => {
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const copy = response.clone();
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caches.open(CACHE_NAME).then((cache) => cache.put(request, copy));
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return response;
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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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// Everything else: pass through. In particular, /api/public/intake and
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// the intake Server Action must NOT be intercepted — a stale cached
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// response there would corrupt an in-flight interview.
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});
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