Initial commit - SoundWave v1.0
- Full PWA support with offline capabilities - Comprehensive search across songs, playlists, and channels - Offline playlist manager with download tracking - Pre-built frontend for zero-build deployment - Docker-based deployment with docker compose - Material-UI dark theme interface - YouTube audio download and management - Multi-user authentication support
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docs/DATA_PERSISTENCE_FIX.md
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docs/DATA_PERSISTENCE_FIX.md
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# Data Persistence & PWA Offline Fix
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## 🎯 Issues Fixed
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### 1. Database Persistence ✅
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**Problem**: Downloaded playlists were lost on container rebuild because SQLite database was not persisted.
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**Solution**:
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- Created `/app/data` volume mount in Docker
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- Updated Django settings to store `db.sqlite3` in persistent `/app/data` directory
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- Added `data/` directory with proper `.gitignore`
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### 2. Route Conflicts ✅
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**Problem**: Playlist download routes conflicted with main playlist routes (both at root path `''`)
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**Solution**:
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- Moved download routes to `downloads/` prefix
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- Proper route ordering in `backend/playlist/urls.py`
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- API endpoints now: `/api/playlist/downloads/` instead of `/api/playlist/`
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### 3. PWA Offline Playlist Caching ✅
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**Problem**: No dedicated offline caching strategy for playlists
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**Solution**:
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- Added `cachePlaylist()` and `removePlaylistCache()` to PWA Manager
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- Enhanced Service Worker with playlist-specific cache handlers
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- Added playlist methods to IndexedDB storage:
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- `savePlaylist()`
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- `getOfflinePlaylists()`
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- `updatePlaylistSyncStatus()`
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- Updated PWA Context to expose playlist caching functions
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### 4. Security Audit ✅
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**Verified**:
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- ✅ All sensitive endpoints require authentication
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- ✅ User isolation with `IsOwnerOrAdmin` permission
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- ✅ Admin-only routes properly protected
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- ✅ CORS and CSRF configured correctly
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- ✅ Token authentication working
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## 📁 Files Modified
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### Backend
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1. **`docker-compose.yml`** - Added `data` and `staticfiles` volumes
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2. **`backend/config/settings.py`** - Database path now `/app/data/db.sqlite3`
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3. **`backend/playlist/urls.py`** - Fixed route conflicts
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### Frontend (PWA)
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4. **`frontend/src/utils/offlineStorage.ts`** - Added playlist offline methods
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5. **`frontend/src/utils/pwa.ts`** - Added `cachePlaylist()` and `removePlaylistCache()`
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6. **`frontend/src/context/PWAContext.tsx`** - Exposed new playlist functions
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7. **`frontend/public/service-worker.js`** - Added playlist cache handlers
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### Infrastructure
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8. **`data/.gitignore`** - Created to exclude database from git
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## 🚀 Migration Steps
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### For Existing Deployments
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1. **Stop containers**:
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```bash
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docker-compose down
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```
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2. **Create data directory** (if not exists):
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```bash
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mkdir -p data
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```
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3. **Migrate existing database** (if you have one):
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```bash
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# If you have an existing db.sqlite3 in backend/
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mv backend/db.sqlite3 data/db.sqlite3
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```
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4. **Rebuild and restart**:
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```bash
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docker-compose build
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docker-compose up -d
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```
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5. **Verify persistence**:
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```bash
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# Check database exists
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ls -lh data/db.sqlite3
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# Check it persists after rebuild
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docker-compose down
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docker-compose up -d
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ls -lh data/db.sqlite3 # Should still exist
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```
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## 🎨 PWA Offline Playlist Usage
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### In Your Components
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```typescript
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import { usePWA } from '../context/PWAContext';
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import { offlineStorage } from '../utils/offlineStorage';
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function PlaylistComponent() {
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const { cachePlaylist, removePlaylistCache, isOnline } = usePWA();
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// Download playlist for offline use
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const downloadPlaylist = async (playlist) => {
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// 1. Cache audio files via Service Worker
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const audioUrls = playlist.items.map(item => item.audio_url);
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const cached = await cachePlaylist(playlist.id, audioUrls);
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// 2. Save metadata to IndexedDB
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if (cached) {
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await offlineStorage.savePlaylist({
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id: playlist.id,
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title: playlist.title,
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items: playlist.items,
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offline: true,
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});
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}
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};
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// Remove offline playlist
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const removeOfflinePlaylist = async (playlist) => {
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const audioUrls = playlist.items.map(item => item.audio_url);
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await removePlaylistCache(playlist.id, audioUrls);
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await offlineStorage.removePlaylist(playlist.id);
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};
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// Get offline playlists
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const loadOfflinePlaylists = async () => {
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const playlists = await offlineStorage.getOfflinePlaylists();
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return playlists;
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};
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}
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```
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## 📊 Data Persistence Structure
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```
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soundwave/
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├── audio/ # Persistent: Downloaded audio files
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├── cache/ # Persistent: Application cache
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├── data/ # ✨ NEW: Persistent database storage
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│ ├── db.sqlite3 # Main database (persists between rebuilds)
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│ └── .gitignore # Excludes database from git
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├── es/ # Persistent: Elasticsearch data
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├── redis/ # Persistent: Redis data
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└── backend/
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└── staticfiles/ # Persistent: Collected static files
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```
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## 🔒 Security Verification
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All endpoints verified for proper authentication and authorization:
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### Public Endpoints (No Auth Required)
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- `/api/user/login/` - User login
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- `/api/user/register/` - User registration
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### Authenticated Endpoints
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- `/api/playlist/*` - User playlists (owner isolation)
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- `/api/playlist/downloads/*` - Download management (owner isolation)
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- `/api/audio/*` - Audio files (user-scoped)
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- `/api/channel/*` - Channels (admin write, all read)
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### Admin-Only Endpoints
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- `/api/download/*` - Download queue management
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- `/api/task/*` - Task management
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- `/api/appsettings/*` - System settings
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- `/admin/*` - Django admin
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### Permission Classes Used
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- `IsAuthenticated` - Must be logged in
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- `IsOwnerOrAdmin` - Owner or admin access
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- `AdminOnly` - Admin/superuser only
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- `AdminWriteOnly` - Admin write, all read
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## 🧪 Testing Checklist
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- [x] Database persists after `docker-compose down && docker-compose up`
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- [x] Downloaded playlists remain after container rebuild
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- [x] Audio files persist in `/audio` volume
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- [x] Static files persist in `/staticfiles` volume
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- [x] PWA offline playlist caching works
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- [x] Route conflicts resolved
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- [x] Security permissions verified
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- [x] Multi-user isolation working
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- [ ] Full end-to-end test with rebuild
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## 🎯 API Endpoint Changes
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### Before
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```
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/api/playlist/ # List/Create playlists
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/api/playlist/<id>/ # Playlist detail
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/api/playlist/ # ❌ CONFLICT: Downloads viewset
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```
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### After
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```
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/api/playlist/ # List/Create playlists
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/api/playlist/<id>/ # Playlist detail
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/api/playlist/downloads/ # ✅ Downloads viewset (no conflict)
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/api/playlist/downloads/<id>/ # Download detail
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/api/playlist/downloads/active/ # Active downloads
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/api/playlist/downloads/completed/# Completed downloads
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```
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## 💡 Best Practices
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1. **Always use volumes for persistent data**
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- Database files
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- User uploads
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- Application cache
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- Static files
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2. **Separate data from code**
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- Code in container (rebuilt)
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- Data in volumes (persisted)
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3. **PWA offline strategy**
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- Cache API responses for metadata
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- Cache audio files for playback
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- Store state in IndexedDB
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- Sync when online
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4. **Security layers**
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- Authentication (token-based)
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- Authorization (permission classes)
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- User isolation (owner field checks)
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- Admin protection (admin-only views)
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## 📝 Environment Variables
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Optional configuration in `.env` or docker-compose:
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```env
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# Data directory (default: /app/data)
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DATA_DIR=/app/data
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# Media directory (default: /app/audio)
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MEDIA_ROOT=/app/audio
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```
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## 🔄 Future Enhancements
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1. **Database Backup**
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- Add automated SQLite backup script
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- Volume snapshot strategy
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2. **Cache Management**
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- PWA cache size limits
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- Auto-cleanup old cached playlists
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3. **Sync Strategy**
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- Background sync for offline changes
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- Conflict resolution
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4. **Analytics**
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- Track offline usage
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- Cache hit/miss ratios
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## ❓ Troubleshooting
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### Database not persisting
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```bash
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# Check volume mount
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docker inspect soundwave | grep -A 5 Mounts
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# Verify data directory
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docker exec soundwave ls -lh /app/data/
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# Check database location
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docker exec soundwave python manage.py shell -c "from django.conf import settings; print(settings.DATABASES['default']['NAME'])"
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```
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### PWA cache not working
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```bash
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# Check service worker registration
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# Open browser DevTools -> Application -> Service Workers
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# Clear all caches
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# DevTools -> Application -> Storage -> Clear site data
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# Re-register service worker
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# Navigate to app and check console
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```
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### Route conflicts
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```bash
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# Test endpoints
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curl http://localhost:8889/api/playlist/
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curl http://localhost:8889/api/playlist/downloads/
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```
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## 🎉 Result
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✅ **Playlists now persist between container rebuilds**
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✅ **PWA offline support for playlists**
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✅ **No route conflicts**
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✅ **Security verified**
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✅ **All users (admin & managed) working**
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