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PWA Implementation Summary

What Was Added

Core PWA Files

  1. Service Worker (frontend/public/sw.js)

    • Caches static assets and API responses
    • Implements network-first strategy for API calls
    • Cache-first strategy for static assets
    • Background sync for failed requests
    • Push notification handlers

  2. Web App Manifest (frontend/public/manifest.json)

    • App metadata and branding
    • Icon definitions for all sizes
    • Display mode and theme colors
    • App shortcuts for quick access

  3. PWA Utilities (frontend/lib/pwa.js)

    • Service worker registration
    • Push notification subscription management
    • Background sync triggers
    • Online/offline status monitoring

  4. Offline Storage (frontend/lib/offlineStorage.js)

    • IndexedDB wrapper for offline data caching
    • API response caching for offline access

UI Components

  1. Network Status Banner (frontend/components/NetworkStatus.js)

    • Shows online/offline status
    • Auto-dismisses when back online

  2. PWA Install Prompt (frontend/components/PWAInstallPrompt.js)

    • Prompts users to install the app
    • Handles beforeinstallprompt event

  3. Offline Page (frontend/pages/offline.js)

    • Fallback page when offline
    • Retry button to check connection

Hooks & Integration

  1. usePWA Hook (frontend/hooks/usePWA.js)

    • React hook for PWA features
    • Manages notifications and sync

  2. Updated _app.js

    • Registers service worker on load
    • Includes NetworkStatus and PWAInstallPrompt

  3. Updated _document.js

    • PWA meta tags
    • Manifest link
    • Apple touch icons

  4. Updated api.js

    • Offline-aware API client
    • Auto-caches GET requests
    • Queues failed requests for sync

Backend

  1. Notifications API (backend/routes/notifications.js)

    • Subscribe/unsubscribe endpoints
    • Send push notifications
    • VAPID authentication

  2. Updated Settings Page

    • PWA controls
    • Enable/disable notifications
    • Connection status display

Installation Steps

  1. Install Dependencies

    cd novaRewards/backend
npm install

  2. Generate VAPID Keys

    npx web-push generate-vapid-keys

  3. Update .env File Add the generated keys to your .env file (see .env.example)

  4. Create App Icons Place icons in frontend/public/icons/ (see scripts/generate-pwa-icons.md)

  5. Build and Test

    cd novaRewards/frontend
npm run build
npm start

Testing Checklist

  • Service worker registers successfully
  • App works offline (cached pages load)
  • Install prompt appears on supported browsers
  • Push notifications can be enabled/disabled
  • Network status banner shows when offline/online
  • Background sync queues failed requests
  • Manifest loads correctly (check DevTools > Application)

Next Steps

  1. Generate and add app icons
  2. Configure VAPID keys in environment
  3. Test on mobile devices
  4. Consider adding to app stores (TWA for Android)
  5. Monitor PWA metrics and user adoption

Resources