96 lines
2.9 KiB
JavaScript
96 lines
2.9 KiB
JavaScript
// ==========================================
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// Chat Switchboard – Service Worker
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// ==========================================
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// Caches the app shell for offline / instant load.
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// API calls always go to network (never cached).
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//
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// Cache key includes a build hash computed at container
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// startup from the JS file contents. Every deploy produces
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// a new hash, which triggers install → precache → activate
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// → purge old caches automatically.
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const CACHE_NAME = 'switchboard-%%APP_VERSION%%-%%BUILD_HASH%%';
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// App shell files to pre-cache on install
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const SHELL_FILES = [
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'./',
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'./index.html',
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'./css/styles.css',
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'./js/debug.js',
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'./js/events.js',
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'./js/extensions.js',
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'./js/api.js',
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'./js/ui-format.js',
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'./js/ui-primitives.js',
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'./js/ui-core.js',
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'./js/ui-settings.js',
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'./js/ui-admin.js',
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'./js/tokens.js',
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'./js/notes.js',
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'./js/attachments.js',
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'./js/tools-toggle.js',
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'./js/knowledge-ui.js',
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'./js/chat.js',
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'./js/settings-handlers.js',
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'./js/admin-handlers.js',
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'./js/app.js',
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'./vendor/marked.min.js',
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'./vendor/purify.min.js',
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'./favicon.svg',
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'./favicon.ico',
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'./favicon-32.png',
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'./favicon-256.png',
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'./manifest.json',
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];
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// Install: pre-cache the shell
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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 => cache.addAll(SHELL_FILES))
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.then(() => self.skipWaiting())
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);
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});
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// Activate: purge old caches
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self.addEventListener('activate', (event) => {
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event.waitUntil(
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caches.keys().then(keys =>
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Promise.all(
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keys.filter(k => k !== CACHE_NAME)
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.map(k => caches.delete(k))
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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: network-first for API/WS, stale-while-revalidate for shell assets
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self.addEventListener('fetch', (event) => {
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const url = new URL(event.request.url);
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// Never cache API calls, WebSocket upgrades, branding, or extension assets
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if (url.pathname.includes('/api/') ||
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url.pathname.includes('/ws') ||
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url.pathname.includes('/branding/') ||
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url.pathname.includes('/extensions/') ||
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event.request.method !== 'GET') {
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return;
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}
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// Stale-while-revalidate: serve cached, update in background
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event.respondWith(
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caches.match(event.request).then(cached => {
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const fetchPromise = fetch(event.request).then(response => {
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// Update cache with fresh version
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if (response.ok) {
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const clone = response.clone();
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caches.open(CACHE_NAME).then(cache => cache.put(event.request, clone));
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}
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return response;
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}).catch(() => cached); // offline fallback to cache
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return cached || fetchPromise;
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})
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);
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});
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