webapp

webapp/sw.js

@@ -0,0 +1,48 @@
+const CACHE_NAME = 'radiocast-core-v1';
+const CORE_ASSETS = [
+  '.',
+  'index.html',
+  'main.js',
+  'styles.css',
+  'stations.json',
+  'assets/favicon_io/android-chrome-192x192.png',
+  'assets/favicon_io/android-chrome-512x512.png',
+  'assets/favicon_io/apple-touch-icon.png'
+];
+
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME).then((cache) => cache.addAll(CORE_ASSETS))
+  );
+});
+
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys().then((keys) => Promise.all(
+      keys.map((k) => { if (k !== CACHE_NAME) return caches.delete(k); return null; })
+    ))
+  );
+});
+
+self.addEventListener('fetch', (event) => {
+  // Only handle GET requests
+  if (event.request.method !== 'GET') return;
+
+  event.respondWith(
+    caches.match(event.request).then((cached) => {
+      if (cached) return cached;
+      return fetch(event.request).then((networkResp) => {
+        // Optionally cache new resources (best-effort)
+        try {
+          const respClone = networkResp.clone();
+          caches.open(CACHE_NAME).then((cache) => cache.put(event.request, respClone)).catch(()=>{});
+        } catch (e) {}
+        return networkResp;
+      }).catch(() => {
+        // If offline and HTML navigation, return cached index.html
+        if (event.request.mode === 'navigate') return caches.match('index.html');
+        return new Response('', { status: 503, statusText: 'Service Unavailable' });
+      });
+    })
+  );
+});