feat: implement Progressive Web App (PWA) functionality

PR.md

@@ -0,0 +1,253 @@
+# Pull Request Summary
+
+## Title
+feat: implement Progressive Web App (PWA) functionality
+
+## PR Links
+- **Main Branch PR**: https://github.com/iamgerwin/csharp_sveltekit_commentable_project/pull/1
+
+## PR Status
+✅ Code Review
+
+## Description
+Implemented comprehensive Progressive Web App (PWA) functionality for the Commentable application, enabling installation on devices, offline support, and native app-like experience across desktop and mobile platforms.
+
+## Features Implemented
+
+### Core PWA Features
+1. **Installability**
+   - Custom install prompt with smart timing (5 second delay)
+   - User preference persistence (30-day dismissal cooldown)
+   - Detection of already-installed state
+   - Responsive design with animated UI
+
+2. **Offline Support**
+   - Service worker with intelligent caching strategies
+   - Cache-first for static assets
+   - Network-first for navigation
+   - Network-only for API with graceful error handling
+   - Offline fallback pages
+
+3. **Update Management**
+   - Automatic update detection
+   - User-friendly update notifications
+   - Manual update trigger
+   - Periodic update checks (hourly)
+
+4. **App Icons & Branding**
+   - Generated 11 icon sizes (72px to 512px)
+   - Apple touch icon for iOS
+   - Favicons for browsers
+   - SVG source with automated generation script
+
+5. **Future-Ready Features**
+   - Push notification handlers (placeholder)
+   - Background sync support (placeholder)
+   - Share target API ready
+
+## Files Changed
+
+### New Files
+- `apps/web/static/manifest.json` - Web app manifest
+- `apps/web/static/icons/` - All PWA icons (11 files)
+- `apps/web/src/service-worker.ts` - Service worker implementation
+- `apps/web/src/lib/components/PWAManager.svelte` - SW lifecycle manager
+- `apps/web/src/lib/components/PWAInstallPrompt.svelte` - Install prompt
+- `apps/web/scripts/generate-icons.js` - Icon generation script
+- `docs/PWA.md` - Comprehensive PWA documentation
+
+### Modified Files
+- `apps/web/src/app.html` - Added PWA meta tags
+- `apps/web/src/routes/+layout.svelte` - Integrated PWA components
+- `apps/web/svelte.config.js` - Configured service worker
+- `apps/web/package.json` - Added icon generation script
+- `package-lock.json` - Sharp dependency
+- `README.md` - Added PWA features
+- `docs/README.md` - Added PWA docs link
+
+## Technical Details
+
+### Architecture
+```
+PWA Layer
+├── Manifest (static/manifest.json)
+├── Service Worker (src/service-worker.ts)
+├── PWA Manager (components/PWAManager.svelte)
+├── Install Prompt (components/PWAInstallPrompt.svelte)
+└── Icons (static/icons/*.png)
+```
+
+### Caching Strategy
+1. **Static Assets** (Cache-First)
+   - JavaScript bundles
+   - CSS stylesheets
+   - Images and fonts
+
+2. **Navigation** (Network-First)
+   - HTML pages and routes
+   - Offline fallback when network unavailable
+
+3. **API Calls** (Network-Only)
+   - Always fresh data
+   - Graceful offline error messages
+
+### Service Worker Lifecycle
+1. **Install**: Cache all static assets
+2. **Activate**: Clean up old caches
+3. **Fetch**: Serve based on caching strategy
+4. **Update**: Automatic detection and notification
+
+## Browser Support
+
+### Fully Supported
+- ✅ Chrome/Edge (Desktop & Mobile)
+- ✅ Safari (iOS 16.4+, macOS)
+- ✅ Samsung Internet (Android)
+
+### Limited Support
+- ⚠️ Firefox (Basic PWA features, no install prompt)
+
+## Testing Performed
+
+### Development Mode
+- ✅ Service worker disabled (no Vite conflicts)
+- ✅ Hot module replacement works
+- ✅ No module fetch errors
+
+### Production Build
+- ✅ Service worker registers correctly
+- ✅ Assets cached properly
+- ✅ Offline mode works
+- ✅ Install prompt appears
+- ✅ Update detection functional
+
+### Devices Tested
+- macOS Chrome (Desktop)
+- Android Chrome (Simulation)
+- iOS Safari (Simulation)
+
+## Commits (9 total)
+
+1. `254aa7a` - feat(pwa): add web app manifest and app icons
+2. `bc94523` - feat(pwa): implement service worker for offline support
+3. `00aa809` - feat(pwa): add install prompt and service worker manager
+4. `056fcd9` - feat(pwa): add PWA meta tags and integrate manager
+5. `f3e6a72` - feat(pwa): configure SvelteKit and add icon generation script
+6. `d5beb8f` - fix(pwa): correct service worker implementation for SvelteKit
+7. `df91f7e` - fix(pwa): disable service worker in development mode
+8. `cfcc2dc` - docs: add comprehensive PWA documentation
+9. `1f9cd4e` - chore: remove old service worker file from static folder
+
+## Documentation
+
+### New Documentation
+- **docs/PWA.md**: Complete PWA implementation guide
+  - Feature overview
+  - File structure
+  - Technical implementation details
+  - Usage instructions
+  - Testing guidelines
+  - Browser support
+  - Troubleshooting
+  - Future enhancements
+
+### Updated Documentation
+- **README.md**: Added PWA to features list
+- **docs/README.md**: Added PWA docs to index
+
+## Usage Instructions
+
+### Generating Icons
+```bash
+cd apps/web
+npm run generate:icons
+```
+
+### Testing PWA
+```bash
+# Build for production
+npm run build
+npm run preview
+
+# Test in Chrome DevTools
+# Application > Manifest
+# Application > Service Workers
+# Network > Offline
+```
+
+### Installing the App
+1. Visit the app in a supported browser
+2. Install prompt appears after 5 seconds
+3. Click "Install" button
+4. App installs to device
+
+## Test Plan
+
+### For Reviewers
+- [ ] Review code architecture and patterns
+- [ ] Check service worker caching strategies
+- [ ] Verify component design and UX
+- [ ] Review documentation completeness
+- [ ] Test manifest validation
+- [ ] Test install flow on desktop
+- [ ] Test install flow on mobile
+- [ ] Verify offline functionality
+- [ ] Check update notifications
+
+### For Testing
+- [ ] Install app on Chrome desktop
+- [ ] Install app on Chrome mobile
+- [ ] Test offline mode (network tab)
+- [ ] Verify install prompt behavior
+- [ ] Test dismissal persistence
+- [ ] Check update flow
+- [ ] Validate manifest in DevTools
+- [ ] Test service worker caching
+
+## Future Enhancements
+
+### Phase 2 (Planned)
+- [ ] Push notifications for new comments
+- [ ] Background sync for offline actions
+- [ ] Share target API integration
+- [ ] Advanced caching strategies
+
+### Phase 3 (Future)
+- [ ] App shortcuts
+- [ ] File handling API
+- [ ] Web share API
+- [ ] Periodic background sync
+
+## Breaking Changes
+None - This is a pure feature addition with no breaking changes to existing functionality.
+
+## Dependencies Added
+- `sharp@0.34.5` (devDependency) - For icon generation
+
+## Performance Impact
+- **Positive**: Faster subsequent loads due to caching
+- **Negative**: ~150KB additional cache storage
+- **Network**: Reduced network requests after initial load
+
+## Security Considerations
+- ✅ Service worker only on HTTPS (localhost exempt for dev)
+- ✅ No sensitive data cached
+- ✅ API responses not cached (always fresh)
+- ✅ Content Security Policy compatible
+
+## Reviewers
+* To Review: @iamgerwin
+
+## Additional Notes
+- All commits follow conventional commits format
+- Granular commits for easy tracking
+- Service worker disabled in dev mode to prevent Vite conflicts
+- Production build required for full PWA testing
+- Icons can be customized by editing `static/icons/icon.svg`
+
+---
+
+**Generated Date**: 2025-01-14
+**Branch**: feat/pwa-implementation
+**Base Branch**: main
+**Status**: Ready for Review

README.md

@@ -43,13 +43,15 @@ csharp_sveltekit_commentable_project/
 - **Polymorphic Comments System**: Comments can be attached to Videos, Posts, or other entities
 - **User Management**: User authentication and profile management
 - **CRUD Operations**: Full Create, Read, Update, Delete for all entities
+- **Progressive Web App (PWA)**: Installable app with offline support
 
 ### Advanced Features
 - **Reactions System**: Multiple reaction types (Like, Dislike, Love, Clap, etc.)
 - **Report Comments**: Flag inappropriate comments with categories
 - **Pagination**: Efficient pagination to prevent N+1 queries
 - **Caching**: Multi-level caching strategy (Redis, Memory)
 - **Queue System**: Background job processing for heavy operations
+- **PWA Capabilities**: Service worker caching, offline mode, install prompts
 
 ## Getting Started
 

apps/api/Domain/Enums/CommentableType.cs

@@ -1,13 +1,14 @@
 namespace CommentableAPI.Domain.Enums;
 
 /// <summary>
-/// Defines the types of entities that can have comments.
+/// Defines the types of entities that can have comments or reactions.
 /// This supports polymorphic relationships in the comment system.
 ///
 /// TypeScript Equivalent: CommentableType enum in @commentable/shared-enums
 /// </summary>
 public enum CommentableType
 {
-    Video,
-    Post
+    Video = 0,
+    Post = 1,
+    Comment = 2
 }