71 lines
2.0 KiB
JavaScript
71 lines
2.0 KiB
JavaScript
const CACHE_NAME = 'kit-ui-v1';
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const ASSETS_TO_CACHE = [
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'/',
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'/manifest.webmanifest',
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'/icon.png',
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'/wasm/magick.wasm',
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'/wasm/ffmpeg-core.wasm',
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'/wasm/ffmpeg-core.js',
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];
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// Install Event - Pre-cache core assets
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self.addEventListener('install', (event) => {
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event.waitUntil(
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caches.open(CACHE_NAME).then((cache) => {
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console.log('Pre-caching assets');
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return cache.addAll(ASSETS_TO_CACHE);
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})
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);
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self.skipWaiting();
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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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})
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);
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self.clients.claim();
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});
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// Fetch Event - Stale-while-revalidate strategy
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self.addEventListener('fetch', (event) => {
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// Only handle GET requests
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if (event.request.method !== 'GET') return;
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// Skip browser extensions and non-http(s) requests
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if (!event.request.url.startsWith('http')) return;
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event.respondWith(
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caches.match(event.request).then((cachedResponse) => {
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const fetchPromise = fetch(event.request).then((networkResponse) => {
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// Only cache valid responses
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if (networkResponse && networkResponse.status === 200 && networkResponse.type === 'basic') {
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const responseToCache = networkResponse.clone();
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caches.open(CACHE_NAME).then((cache) => {
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cache.put(event.request, responseToCache);
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});
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}
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return networkResponse;
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}).catch((err) => {
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// If offline and not in cache, and it's a page navigation, return the root page
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if (event.request.mode === 'navigate') {
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return caches.match('/');
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}
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throw err;
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});
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// Return cached response if available, else wait for network
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return cachedResponse || fetchPromise;
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})
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);
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});
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