sw.js

const CACHE_NAME = 'git-ladder-v1';
const ASSETS_TO_CACHE = [
    './',
    './index.html',
    './src/css/style.css',
    './src/js/App.js',
    './src/js/ChartManager.js',
    './src/js/DataService.js',
    './src/js/ThemeManager.js',
    './manifest.json',
    './images/icon-192.png',
    './images/icon-512.png',
    'https://cdn.jsdelivr.net/npm/chart.js@4.4.1/dist/chart.umd.min.js',
    'https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap'
];

self.addEventListener('install', (event) => {
    event.waitUntil(
        caches.open(CACHE_NAME)
            .then((cache) => {
                return cache.addAll(ASSETS_TO_CACHE);
            })
    );
});

self.addEventListener('activate', (event) => {
    event.waitUntil(
        caches.keys().then((cacheNames) => {
            return Promise.all(
                cacheNames.map((cacheName) => {
                    if (cacheName !== CACHE_NAME) {
                        return caches.delete(cacheName);
                    }
                })
            );
        })
    );
});

self.addEventListener('fetch', (event) => {
    event.respondWith(
        fetch(event.request)
            .then((response) => {
                // Check if we received a valid response
                if (!response || response.status !== 200 || response.type !== 'basic') {
                    return response;
                }

                // Clone the response
                const responseToCache = response.clone();

                // Update cache with new version
                caches.open(CACHE_NAME)
                    .then((cache) => {
                        cache.put(event.request, responseToCache);
                    });

                return response;
            })
            .catch(() => {
                // Network failed, try cache
                return caches.match(event.request);
            })
    );
});