Spaces:
Running on Zero
Running on Zero
File size: 3,752 Bytes
38bd54a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 | /**
* HearthNet Service Worker
*
* Enables offline-first functionality and caching for PWA.
* Installed via manifest.json
*/
const CACHE_NAME = 'hearthnet-v0.1.0';
const STATIC_ASSETS = [
'/',
'/index.html',
'/manifest.json',
'/static/icon-192.png',
'/static/icon-512.png',
'/static/styles.css',
];
/**
* Install event: Pre-cache static assets
*/
self.addEventListener('install', (event) => {
console.log('[Service Worker] Installing...');
event.waitUntil(
caches.open(CACHE_NAME).then((cache) => {
console.log('[Service Worker] Caching static assets');
return cache.addAll(STATIC_ASSETS).catch((err) => {
console.warn('[Service Worker] Some assets failed to cache:', err);
// Don't fail on cache errors (some assets may not exist)
});
})
);
self.skipWaiting();
});
/**
* Activate event: Clean up old caches
*/
self.addEventListener('activate', (event) => {
console.log('[Service Worker] Activating...');
event.waitUntil(
caches.keys().then((cacheNames) => {
return Promise.all(
cacheNames.map((cacheName) => {
if (cacheName !== CACHE_NAME) {
console.log('[Service Worker] Deleting old cache:', cacheName);
return caches.delete(cacheName);
}
})
);
})
);
self.clients.claim();
});
/**
* Fetch event: Cache-first strategy for static assets, network-first for API calls
*/
self.addEventListener('fetch', (event) => {
const { request } = event;
const url = new URL(request.url);
// Skip non-GET requests
if (request.method !== 'GET') {
return;
}
// API calls: Network-first (always try server)
if (url.pathname.startsWith('/api/') ||
url.pathname.startsWith('/bus/') ||
url.pathname.startsWith('/trace/')) {
event.respondWith(
fetch(request)
.then((response) => {
// Cache successful responses
if (response.status === 200) {
const cache = caches.open(CACHE_NAME);
cache.then((c) => c.put(request, response.clone()));
}
return response;
})
.catch(() => {
// Fallback to cache if offline
return caches.match(request).then((cached) => {
if (cached) {
console.log('[Service Worker] Serving from cache (offline):', request.url);
return cached;
}
// Return offline page or error
return new Response('Offline - API unavailable', {
status: 503,
statusText: 'Service Unavailable',
});
});
})
);
return;
}
// Static assets: Cache-first
event.respondWith(
caches.match(request).then((cached) => {
if (cached) {
return cached;
}
return fetch(request).then((response) => {
if (response.status === 200) {
caches.open(CACHE_NAME).then((cache) => {
cache.put(request, response.clone());
});
}
return response;
});
})
);
});
/**
* Background sync: Queue API calls when offline
*/
self.addEventListener('sync', (event) => {
if (event.tag === 'sync-messages') {
event.waitUntil(
// Implement message queue sync here
Promise.resolve()
);
}
});
/**
* Push notifications
*/
self.addEventListener('push', (event) => {
const options = {
body: event.data?.text() || 'New notification from HearthNet',
icon: '/static/icon-192.png',
badge: '/static/icon-96.png',
tag: 'hearthnet-notification',
requireInteraction: false,
};
event.waitUntil(
self.registration.showNotification('HearthNet', options)
);
});
console.log('[Service Worker] Loaded and ready');
|