feat: Enhance PWA with advanced service worker (network-first strategy), background sync, and push notifications

public/sw.js

@@ -1,30 +1,182 @@
-const CACHE_NAME = 'construprogress-cache-v1';
-const urlsToCache = [
+const CACHE_NAME = 'avante-cache-v2';
+const DATA_CACHE_NAME = 'avante-data-cache-v1';
+
+// Files to cache for offline functionality
+const FILES_TO_CACHE = [
   '/',
   '/dashboard',
-  '/projects',
-  '/projects-list',
-  '/projects/templates',
+  '/reports/dashboard',
+  '/client',
+  '/client/projects',
+  '/manifest.json',
   '/css/app.css',
   '/js/app.js',
-  // Add other assets as needed
+  'https://unpkg.com/leaflet@1.9.4/dist/leaflet.css',
+  'https://unpkg.com/leaflet@1.9.4/dist/leaflet.js',
+  'https://cdnjs.cloudflare.com/ajax/libs/leaflet.draw/1.0.4/leaflet.draw.css',
+  'https://cdnjs.cloudflare.com/ajax/libs/leaflet.draw/1.0.4/leaflet.draw.js',
+  'https://fonts.bunny.net/css?family=figtree:400,500,600&display=swap',
+  '/icons/icon-72x72.png',
+  '/icons/icon-96x96.png',
+  '/icons/icon-128x128.png',
+  '/icons/icon-144x144.png',
+  '/icons/icon-152x152.png',
+  '/icons/icon-192x192.png',
+  '/icons/icon-384x384.png',
+  '/icons/icon-512x512.png'
 ];
 
+// Install the service worker and cache the app shell
 self.addEventListener('install', (event) => {
+  console.log('[ServiceWorker] Install');
   event.waitUntil(
     caches.open(CACHE_NAME)
-      .then((cache) => cache.addAll(urlsToCache))
+      .then((cache) => {
+        console.log('[ServiceWorker] Caching app shell');
+        return cache.addAll(FILES_TO_CACHE);
+      })
   );
+  self.skipWaiting();
 });
 
+// Activate the service worker and clean up old caches
+self.addEventListener('activate', (event) => {
+  console.log('[ServiceWorker] Activate');
+  event.waitUntil(
+    caches.keys().then((keyList) => {
+      return Promise.all(
+        keyList.map((key) => {
+          if (key !== CACHE_NAME && key !== DATA_CACHE_NAME) {
+            console.log('[ServiceWorker] Removing old cache', key);
+            return caches.delete(key);
+          }
+        })
+      );
+    })
+  );
+  self.clients.claim();
+});
+
+// Fetch strategy: Network first, falling back to cache
 self.addEventListener('fetch', (event) => {
+  // Handle API requests differently - cache first, then network
+  if (event.request.url.includes('/api/') || event.request.url.includes('/offline/')) {
+    event.respondWith(
+      caches.open(DATA_CACHE_NAME)
+        .then((cache) => {
+          return fetch(event.request)
+            .then((response) => {
+              // Clone the response to put in cache and return original
+              if (response.status === 200) {
+                cache.put(event.request.url, response.clone());
+              }
+              return response;
+            })
+            .catch(() => {
+              // If network fails, try to get from cache
+              return caches.match(event.request);
+            })
+        })
+    );
+    return;
+  }
+
+  // For everything else, use cache first with network fallback
   event.respondWith(
     caches.match(event.request)
-      .then((response) => {
-        if (response) {
-          return response;
+      .then((cachedResponse) => {
+        if (cachedResponse) {
+          return cachedResponse;
+        }
+        
+        // If not in cache, fetch from network and cache it
+        return caches.open(CACHE_NAME)
+          .then((cache) => {
+            return fetch(event.request)
+              .then((networkResponse) => {
+                // Don't cache non-successful responses
+                if (networkResponse && networkResponse.status === 200 && networkResponse.type === 'basic') {
+                  cache.put(event.request, networkResponse.clone());
+                }
+                return networkResponse;
+              });
+          });
+      })
+      .catch(() => {
+        // If both cache and network fail, show offline fallback
+        if (event.request.mode === 'navigate') {
+          return caches.match('/');
         }
-        return fetch(event.request);
       })
   );
 });
+
+// Handle background sync for offline actions
+self.addEventListener('sync', (event) => {
+  console.log('[ServiceWorker] Background syncing', event.tag);
+  if (event.tag === 'offline-sync') {
+    event.waitUntil(syncOfflineActions());
+  }
+});
+
+// Handle push notifications
+self.addEventListener('push', (event) => {
+  console.log('[ServiceWorker] Push received');
+  const options = {
+    body: event.data ? event.data.text() : 'Tienes una nueva notificación',
+    icon: '/icons/icon-192x192.png',
+    badge: '/icons/icon-72x72.png',
+    vibrate: [100, 50, 100],
+    data: {
+      dateOfArrival: Date.now(),
+      primaryKey: 1
+    }
+  };
+  
+  event.waitUntil(
+    self.registration.showNotification('Avante', options)
+  );
+});
+
+self.addEventListener('notificationclick', (event) => {
+  console.log('[ServiceWorker] Notification click: ', event.notification);
+  event.notification.close();
+  
+  // Determine what to open based on notification data
+  const urlToOpen = '/client'; // Default to client portal
+  
+  event.waitUntil(
+    clients.matchAll({
+      type: 'window',
+      includeUncontrolled: true
+    }).then((clientList) => {
+      for (const client of clientList) {
+        if (client.url === urlToOpen && 'focus' in client) {
+          return client.focus();
+        }
+      }
+      if (clients.openWindow) {
+        return clients.openWindow(urlToOpen);
+      }
+    })
+  );
+});
+
+// Helper function to sync offline actions
+async function syncOfflineActions() {
+  console.log('[ServiceWorker] Syncing offline actions');
+  // This would typically make a request to your backend to sync pending actions
+  // For now, we'll just log it
+  try {
+    const response = await fetch('/offline/sync', {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      }
+    });
+    return response.json();
+  } catch (error) {
+    console.error('[ServiceWorker] Sync failed:', error);
+    throw error;
+  }
+}