service-worker.js

// Service Worker for SecureVault PWA

const CACHE_NAME = 'nodetools-v1';
const ASSETS_TO_CACHE = [
  '/',
  '/index.html',
  '/styles/main.css',
  '/js/app.js',
  '/js/auth.js',
  '/js/database.js',
  '/js/editor.js',
  '/js/files.js',
  '/js/photos.js',
  '/js/ui.js',
  '/manifest.json'
];

// Install event - cache static assets
self.addEventListener('install', event => {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then(cache => {
        console.log('Caching app assets');
        return cache.addAll(ASSETS_TO_CACHE);
      })
      .then(() => self.skipWaiting())
  );
});

// Activate event - clean up old caches
self.addEventListener('activate', event => {
  event.waitUntil(
    caches.keys().then(cacheNames => {
      return Promise.all(
        cacheNames.map(cacheName => {
          if (cacheName !== CACHE_NAME) {
            console.log('Deleting old cache:', cacheName);
            return caches.delete(cacheName);
          }
        })
      );
    }).then(() => self.clients.claim())
  );
});

// Fetch event - serve from cache or network
self.addEventListener('fetch', event => {
  // Skip for non-GET requests
  if (event.request.method !== 'GET') return;
  
  // Skip for Chrome extension requests
  if (event.request.url.startsWith('chrome-extension://')) return;
  
  // Skip for browser-sync requests during development
  if (event.request.url.includes('browser-sync')) return;
  
  // Handle API requests differently (don't cache)
  if (event.request.url.includes('/api/')) {
    return fetch(event.request);
  }
  
  event.respondWith(
    caches.match(event.request)
      .then(cachedResponse => {
        // Return cached response if available
        if (cachedResponse) {
          return cachedResponse;
        }
        
        // Otherwise fetch from network
        return fetch(event.request)
          .then(response => {
            // Don't cache if not a valid response
            if (!response || response.status !== 200 || response.type !== 'basic') {
              return response;
            }
            
            // Clone the response as it can only be consumed once
            const responseToCache = response.clone();
            
            caches.open(CACHE_NAME)
              .then(cache => {
                cache.put(event.request, responseToCache);
              });
            
            return response;
          })
          .catch(error => {
            console.error('Fetch failed:', error);
            
            // If offline and requesting an HTML page, show fallback
            if (event.request.headers.get('Accept').includes('text/html')) {
              return caches.match('/index.html');
            }
            
            return new Response('Network error', {
              status: 408,
              headers: { 'Content-Type': 'text/plain' }
            });
          });
      })
  );
});

// Handle push notifications
self.addEventListener('push', event => {
  if (!event.data) return;
  
  const data = event.data.json();
  
  const options = {
    body: data.body || 'New notification',
    icon: '/images/icons/icon-192x192.png',
    badge: '/images/icons/badge-72x72.png',
    data: {
      url: data.url || '/'
    }
  };
  
  event.waitUntil(
    self.registration.showNotification(data.title || 'NodeTools', options)
  );
});

// Handle notification click
self.addEventListener('notificationclick', event => {
  event.notification.close();
  
  const url = event.notification.data.url;
  
  event.waitUntil(
    clients.matchAll({ type: 'window' })
      .then(windowClients => {
        // If there is an open window, focus it
        for (const client of windowClients) {
          if (client.url === url && 'focus' in client) {
            return client.focus();
          }
        }
        
        // Otherwise open a new window
        if (clients.openWindow) {
          return clients.openWindow(url);
        }
      })
  );
});