python

.serena/memories/python_backend_rewrite_complete.md

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+# Python Backend Rewrite Complete
+
+## Summary
+Successfully rewrote the Node.js/TypeScript backend to Python with VK Music integration.
+
+## New Python Backend Structure
+```
+├── main.py                 # Entry point - FastAPI app with uvicorn
+├── requirements.txt        # Python dependencies
+├── setup.py               # Environment setup script
+├── backend/
+│   ├── __init__.py
+│   ├── database.py        # SQLAlchemy models and database connection
+│   ├── vkmusic.py         # VK Music API integration (replaced SoundCloud)
+│   ├── api.py             # FastAPI routes and endpoints
+│   └── bot.py             # Telegram bot functionality
+├── Dockerfile             # Updated for Python
+└── .env                   # Environment variables (created by setup.py)
+```
+
+## Key Changes Made
+1. **Framework**: Express.js → FastAPI
+2. **Music Service**: SoundCloud → VK Music (vk-api library)
+3. **Database**: Direct PostgreSQL → SQLAlchemy ORM
+4. **Bot**: node-telegram-bot-api → python-telegram-bot
+5. **Audio Processing**: fluent-ffmpeg → subprocess + FFmpeg
+
+## API Endpoints (Preserved)
+- `GET /` - Serve main HTML with cache-busting
+- `POST /api/search` - Search VK Music tracks
+- `POST /api/convert` - Convert audio to MP3
+- `POST /api/telegram-send` - Send audio via Telegram
+- `GET /health` - Health check
+- `GET /downloads/{filename}` - Serve MP3 files
+
+## Environment Variables Required
+- `DATABASE_URL` - PostgreSQL connection string
+- `VK_LOGIN` - VK account login
+- `VK_PASSWORD` - VK account password  
+- `TELEGRAM_BOT_TOKEN` - Telegram bot token
+- `WEB_APP_URL` - Web app URL for bot
+- `PORT` - Server port (default: 8000)
+- `HOST` - Server host (default: 0.0.0.0)
+
+## Setup Instructions
+1. Run `python setup.py` to initialize environment
+2. Update `.env` file with actual credentials
+3. Install dependencies: `pip install -r requirements.txt`
+4. Start server: `python main.py`
+5. Access API at: http://localhost:8000
+
+## Docker Support
+Updated Dockerfile uses Python 3.11-slim with ffmpeg support. Ready for containerized deployment.
+
+## Next Steps
+- Test VK Music integration with actual credentials
+- Update frontend if needed to work with new Python API
+- Deploy and test in production environment