https://armenia.travel/service-worker.js

1'use strict';
2
3// Increment this manually or with build time if needed
4const CACHE_NAME = 'armenia.travel-cache-pwa' + new Date().getTime();
5const OFFLINE_URL = '/offline.html';
6
7// URLs we want to pre-cache for offline mode
8const FILES_TO_CACHE = ['/', OFFLINE_URL];
9
10// URLs we never want to cache (dynamic build assets, manifest)
11const NEVER_CACHE = ['/_next/static/', '/manifest.json', '/manifest.js'];
12
13// ----------------------------------------------------------------------
14// 🏗 INSTALL
15self.addEventListener('install', (event) => {
16	console.log('[Armenia Travel PWA] Installing new service worker...');
17
18	event.waitUntil(
19		caches.open(CACHE_NAME).then(async (cache) => {
20			console.log('[Armenia Travel PWA] Caching offline essentials...');
21			try {
22				await Promise.all(
23					FILES_TO_CACHE.map(async (url) => {
24						try {
25							const response = await fetch(url, { cache: 'no-store' });
26							if (response.ok) {
27								await cache.put(url, response);
28							}
29						} catch (err) {
30							console.warn('[Armenia Travel PWA] Failed to cache:', url, err);
31						}
32					})
33				);
34			} catch (error) {
35				console.error('[Armenia Travel PWA] Cache install error:', error);
36			}
37		})
38	);
39
40	self.skipWaiting();
41});
42
43// ----------------------------------------------------------------------
44// 🚀 ACTIVATE
45self.addEventListener('activate', (event) => {
46	console.log('[Armenia Travel PWA] Activating and cleaning old caches...');
47
48	event.waitUntil(
49		caches.keys().then((keys) =>
50			Promise.all(
51				keys.map((key) => {
52					if (key !== CACHE_NAME) {
53						console.log('[Armenia Travel PWA] Removing old cache:', key);
54						return caches.delete(key);
55					}
56				})
57			)
58		)
59	);
60
61	// Take control of clients and force reload
62	event.waitUntil(
63		(async () => {
64			const clients = await self.clients.matchAll({ type: 'window' });
65			for (const client of clients) {
66				client.navigate(client.url);
67			}
68		})()
69	);
70
71	self.clients.claim();
72});
73
74// ----------------------------------------------------------------------
75// 🌐 FETCH
76self.addEventListener('fetch', (event) => {
77	const { request } = event;
78
79	// Skip non-HTTP(S) requests
80	if (!/^https?:\/\//i.test(request.url)) return;
81
82	// Skip requests from other origins
83	if (new URL(request.url).origin !== location.origin) return;
84
85	// Skip Next.js build files & manifest
86	if (NEVER_CACHE.some((pattern) => request.url.includes(pattern))) {
87		return;
88	}
89
90	// Don't cache POST/PUT/DELETE
91	if (request.method !== 'GET') {
92		event.respondWith(fetch(request).catch(() => caches.match(OFFLINE_URL)));
93		return;
94	}
95
96	// Try network first, then cache, then offline
97	event.respondWith(
98		fetch(request)
99			.then((response) => {
100				// Cache successful responses
101				const copy = response.clone();
102				caches.open(CACHE_NAME).then((cache) => cache.put(request, copy));
103				return response;
104			})
105			.catch(() => caches.match(request).then((cached) => cached || caches.match(OFFLINE_URL)))
106	);
107});