Phase 3: Advanced PWA Features #67
Description
🚀 Goal
Implement advanced Progressive Web App capabilities to provide enhanced offline experience, better engagement, and native-like functionality.
📋 Features to Implement
1. IndexedDB Integration
Purpose: Structured data storage for offline-first architecture
Tasks:
- Setup IndexedDB wrapper (e.g., Dexie.js or idb)
- Define database schema for core entities
- Implement CRUD operations with IndexedDB
- Add data migration strategies
- Cache API responses in IndexedDB
- Test storage quota handling
Example Schema:
interface SecPalDB {
guards: Guard[];
shifts: Shift[];
reports: Report[];
syncQueue: SyncOperation[];
}2. Background Sync
Purpose: Queue operations when offline and sync when connection restored
Tasks:
- Implement Background Sync API
- Create sync queue in IndexedDB
- Handle failed operations with retry logic
- Add sync status indicators in UI
- Test sync across app restarts
- Implement conflict detection
Use Cases:
- Form submissions while offline
- Data updates queued for sync
- Media uploads when connection available
3. Push Notifications
Purpose: Keep users engaged with timely updates
Tasks:
- Setup push notification infrastructure
- Request notification permissions
- Implement notification handling in Service Worker
- Create notification preferences UI
- Add notification categories (alerts, updates, reminders)
- Test notification delivery across browsers
- Implement notification actions
Notification Types:
- Shift reminders
- Security alerts
- System updates
- Team messages
4. Offline Analytics
Purpose: Track app usage even when offline
Tasks:
- Queue analytics events when offline
- Sync events when connection restored
- Implement privacy-first analytics
- Track offline vs online usage patterns
- Monitor service worker performance
- Error tracking and reporting
5. App Shortcuts
Purpose: Quick access to key features from app icon
Tasks:
- Define app shortcuts in manifest
- Implement shortcut handlers
- Add context-aware shortcuts
- Test shortcuts on mobile/desktop
Example Shortcuts:
- Start new shift
- View current schedule
- Quick report
- Emergency contact
6. Share Target API
Purpose: Allow sharing content to SecPal from other apps
Tasks:
- Configure share target in manifest
- Implement share data handler
- Add file upload handling
- Test share functionality
Use Cases:
- Share photos to incident reports
- Share locations to shift logs
- Share documents to file storage
7. Advanced Caching Strategies
Purpose: Optimize performance and offline experience per feature
Tasks:
- Cache-first for static assets
- Network-first for dynamic content
- Stale-while-revalidate for semi-dynamic content
- Cache expiration policies per data type
- Implement cache invalidation strategies
- Add cache size management
🧪 Testing Requirements
- Unit tests for all new features
- Integration tests for offline scenarios
- E2E tests for background sync flows
- Cross-browser testing (Chrome, Firefox, Safari, Edge)
- Mobile device testing (iOS, Android)
- Performance benchmarks (Lighthouse scores)
📊 Success Metrics
- ✅ Background Sync: 95%+ success rate for queued operations
- ✅ Push Notifications: <2% opt-out rate
- ✅ IndexedDB: <100ms average query time
- ✅ Cache Hit Rate: >80% for frequently accessed resources
- ✅ Offline Functionality: All core features work offline
🔗 Related
- Epic: Epic: Progressive Web App Infrastructure #64 (Progressive Web App Infrastructure)
- Previous Phases: Phase 1: PWA Offline-First Foundation #65 (Phase 1), Phase 2: Multi-Language Support with Translation.io #66 (Phase 2)
- Next Phase: Phase 4: Offline Data Management & Conflict Resolution #68 (Phase 4 - Offline Data Management)
📚 Resources
- Background Sync API
- Push API
- IndexedDB
- Share Target API
- Dexie.js - IndexedDB wrapper
- Workbox - PWA libraries
✅ Acceptance Criteria
- IndexedDB integration complete with schema and migrations
- Background Sync working for offline operations
- Push Notifications implemented with user preferences
- Offline analytics tracking and syncing
- App shortcuts functional on all platforms
- Share Target API accepting relevant content types
- Advanced caching strategies per feature type
- All tests passing
- Documentation complete
- Performance benchmarks met
Type: Sub-Issue of Epic #64
Priority: Medium
Estimated Effort: 2-3 weeks
Dependencies: Phase 1 ✅ Complete