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const {UseServiceWorker, AppSubUrl, AppVer} = window.config;
const cacheName = 'static-cache-v2';
async function unregister() {
for (const registration of await navigator.serviceWorker.getRegistrations()) {
const serviceWorker = registration.active;
if (!serviceWorker) continue;
registration.unregister();
}
}
async function invalidateCache() {
await caches.delete(cacheName);
}
async function checkCacheValidity() {
const cacheKey = AppVer;
const storedCacheKey = localStorage.getItem('staticCacheKey');
// invalidate cache if it belongs to a different gitea version
if (cacheKey && storedCacheKey !== cacheKey) {
invalidateCache();
localStorage.setItem('staticCacheKey', cacheKey);
}
}
export default async function initServiceWorker() {
if (!('serviceWorker' in navigator)) return;
if (UseServiceWorker) {
await checkCacheValidity();
try {
await navigator.serviceWorker.register(`${AppSubUrl}/serviceworker.js`);
} catch (err) {
console.error(err);
await invalidateCache();
await unregister();
}
} else {
await invalidateCache();
await unregister();
}
}
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