Initial commit for Start9 packaging

workout-planner/public/sw.js

@@ -0,0 +1,78 @@
+const CACHE_NAME = 'workout-planner-v1';
+
+// Assets to pre-cache for offline shell
+const PRECACHE_URLS = [
+  '/icons/favicon.svg',
+  '/icons/icon-192x192.png',
+  '/manifest.json',
+];
+
+// Install: pre-cache critical assets
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME).then((cache) => cache.addAll(PRECACHE_URLS))
+  );
+  self.skipWaiting();
+});
+
+// Activate: clean old caches
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys().then((keys) =>
+      Promise.all(
+        keys
+          .filter((key) => key !== CACHE_NAME)
+          .map((key) => caches.delete(key))
+      )
+    )
+  );
+  self.clients.claim();
+});
+
+// Fetch: network-first for API/pages, cache-first for static assets
+self.addEventListener('fetch', (event) => {
+  const { request } = event;
+  const url = new URL(request.url);
+
+  // Skip non-GET requests
+  if (request.method !== 'GET') return;
+
+  // Skip API routes — always go to network
+  if (url.pathname.startsWith('/api/')) return;
+
+  // Static assets (icons, fonts, images): cache-first
+  if (
+    url.pathname.startsWith('/icons/') ||
+    url.pathname.startsWith('/_next/static/') ||
+    url.pathname.endsWith('.svg') ||
+    url.pathname.endsWith('.png') ||
+    url.pathname.endsWith('.woff2')
+  ) {
+    event.respondWith(
+      caches.match(request).then((cached) => {
+        if (cached) return cached;
+        return fetch(request).then((response) => {
+          if (response.ok) {
+            const clone = response.clone();
+            caches.open(CACHE_NAME).then((cache) => cache.put(request, clone));
+          }
+          return response;
+        });
+      })
+    );
+    return;
+  }
+
+  // Pages: network-first with offline fallback
+  event.respondWith(
+    fetch(request)
+      .then((response) => {
+        if (response.ok) {
+          const clone = response.clone();
+          caches.open(CACHE_NAME).then((cache) => cache.put(request, clone));
+        }
+        return response;
+      })
+      .catch(() => caches.match(request))
+  );
+});