klg-asutk-app/public/sw.js

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/**
* Service Worker — КЛГ АСУ ТК v2.
* Стратегия: network-first для API, cache-first для статики.
* Offline fallback для всех страниц.
*/
const CACHE_NAME = 'klg-v2';
const STATIC_CACHE = 'klg-static-v2';
const API_CACHE = 'klg-api-v2';
const SHELL_URLS = [
'/', '/dashboard', '/login', '/offline',
'/aircraft', '/airworthiness', '/airworthiness-core',
'/maintenance', '/defects', '/personnel-plg',
'/calendar', '/risks', '/checklists', '/regulator',
];
// Install: cache app shell
self.addEventListener('install', (event) => {
event.waitUntil(
caches.open(CACHE_NAME).then((cache) => cache.addAll(SHELL_URLS))
);
self.skipWaiting();
});
// Activate: clean old caches
self.addEventListener('activate', (event) => {
event.waitUntil(
caches.keys().then((keys) =>
Promise.all(
keys
.filter((k) => k !== CACHE_NAME && k !== STATIC_CACHE && k !== API_CACHE)
.map((k) => caches.delete(k))
)
)
);
self.clients.claim();
});
// Fetch: network-first for API, cache-first for static
self.addEventListener('fetch', (event) => {
const { request } = event;
const url = new URL(request.url);
// API requests: network-first with cache fallback
if (url.pathname.startsWith('/api/')) {
event.respondWith(
fetch(request)
.then((response) => {
// Cache GET responses for offline
if (request.method === 'GET' && response.ok) {
const clone = response.clone();
caches.open(API_CACHE).then((cache) => cache.put(request, clone));
}
return response;
})
.catch(() => caches.match(request))
);
return;
}
// Static assets: cache-first
if (url.pathname.match(/\.(js|css|png|jpg|svg|woff2?)$/)) {
event.respondWith(
caches.match(request).then((cached) =>
cached || fetch(request).then((response) => {
const clone = response.clone();
caches.open(STATIC_CACHE).then((cache) => cache.put(request, clone));
return response;
})
)
);
return;
}
// Pages: network-first with offline fallback
event.respondWith(
fetch(request)
.then((response) => {
const clone = response.clone();
caches.open(CACHE_NAME).then((cache) => cache.put(request, clone));
return response;
})
.catch(() =>
caches.match(request).then((cached) => cached || caches.match('/offline'))
)
);
});