143 lines
4.1 KiB
JavaScript
143 lines
4.1 KiB
JavaScript
// Service Worker for Edge TTS PWA
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const CACHE_NAME = 'edge-tts-v1';
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const urlsToCache = [
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'/',
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'/index.html',
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'/styles.css',
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'/app.js',
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'/manifest.json',
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'/icon-192.png',
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'/icon-512.png'
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];
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// Install event - cache resources
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self.addEventListener('install', (event) => {
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event.waitUntil(
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caches.open(CACHE_NAME)
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.then((cache) => {
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console.log('Opened cache');
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return cache.addAll(urlsToCache.map(url => {
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// Try to add each URL, but don't fail if some are missing
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return cache.add(url).catch(err => {
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console.log('Failed to cache:', url, err);
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});
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}));
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})
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.then(() => self.skipWaiting())
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);
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});
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// Activate event - clean up old caches
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self.addEventListener('activate', (event) => {
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event.waitUntil(
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caches.keys().then((cacheNames) => {
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return Promise.all(
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cacheNames.map((cacheName) => {
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if (cacheName !== CACHE_NAME) {
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console.log('Deleting old cache:', cacheName);
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return caches.delete(cacheName);
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}
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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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// Fetch event - serve from cache, fallback to network
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self.addEventListener('fetch', (event) => {
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const { request } = event;
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// Skip API requests - always go to network
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if (request.url.includes('/api/')) {
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event.respondWith(
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fetch(request)
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.catch(() => {
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return new Response(
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JSON.stringify({ error: 'Network unavailable' }),
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{
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status: 503,
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headers: { 'Content-Type': 'application/json' }
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}
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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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// Cache-first strategy for static assets
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event.respondWith(
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caches.match(request)
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.then((response) => {
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// Cache hit - return response
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if (response) {
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return response;
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}
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// Clone the request
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const fetchRequest = request.clone();
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return fetch(fetchRequest).then((response) => {
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// Check if valid response
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if (!response || response.status !== 200 || response.type !== 'basic') {
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return response;
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}
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// Clone the response
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const responseToCache = response.clone();
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// Cache the new resource
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caches.open(CACHE_NAME)
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.then((cache) => {
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cache.put(request, responseToCache);
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});
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return response;
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});
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})
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.catch(() => {
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// Return offline page or error
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return new Response('Offline', {
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status: 503,
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statusText: 'Service Unavailable'
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});
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})
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);
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});
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// Background sync for offline TTS generation (future enhancement)
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self.addEventListener('sync', (event) => {
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if (event.tag === 'sync-tts') {
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event.waitUntil(syncTTS());
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}
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});
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async function syncTTS() {
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// Placeholder for future offline TTS queue functionality
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console.log('Syncing pending TTS requests...');
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}
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// Push notifications (future enhancement)
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self.addEventListener('push', (event) => {
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const data = event.data.json();
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const options = {
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body: data.body,
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icon: '/icon-192.png',
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badge: '/icon-192.png',
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vibrate: [200, 100, 200]
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};
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event.waitUntil(
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self.registration.showNotification(data.title, options)
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);
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});
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// Notification click handler
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self.addEventListener('notificationclick', (event) => {
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event.notification.close();
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event.waitUntil(
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clients.openWindow('/')
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);
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});
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