From be5a0c0aab700f8d7579d87c8cce14605598b01c Mon Sep 17 00:00:00 2001
From: Lukas Pupka-Lipinski <lukas.pupkalipinski@lpl-mind.de>
Date: Sun, 5 Oct 2025 22:39:34 +0200
Subject: [PATCH] Mark completed FastAPI setup tasks in web migration TODO

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+# Web Migration TODO: Flask to FastAPI
+
+This document contains tasks for migrating the web application from Flask to FastAPI. Each task should be marked as completed with [x] when finished.
+
+## 📋 Project Analysis and Setup
+
+### Initial Assessment
+- [ ] Review current Flask application structure in `/src/web/` directory
+- [ ] Identify all Flask routes and their HTTP methods
+- [ ] Document current template engine usage (Jinja2)
+- [ ] List all static file serving requirements
+- [ ] Inventory all middleware and extensions currently used
+- [ ] Document current error handling patterns
+- [ ] Review authentication/authorization mechanisms
+
+### FastAPI Setup
+- [x] Install FastAPI dependencies: `pip install fastapi uvicorn jinja2 python-multipart`
+- [x] Update `requirements.txt` or `pyproject.toml` with new dependencies
+- [ ] Remove Flask dependencies: `flask`, `flask-*` packages
+- [x] Create new FastAPI application entry point
+
+## 🔧 Core Application Migration
+
+### Main Application Structure
+- [x] Create new `main.py` or update existing app entry point with FastAPI app instance
+- [x] Migrate Flask app configuration to FastAPI settings using Pydantic BaseSettings
+- [ ] Convert Flask blueprints to FastAPI routers
+- [x] Update CORS configuration from Flask-CORS to FastAPI CORS middleware
+
+### Route Conversion
+- [ ] Convert all `@app.route()` decorators to FastAPI route decorators (`@app.get()`, `@app.post()`, etc.)
+- [ ] Update route parameter syntax from `<int:id>` to `{id: int}` format
+- [ ] Convert Flask request object usage (`request.form`, `request.json`) to FastAPI request models
+- [ ] Update response handling from Flask `jsonify()` to FastAPI automatic JSON serialization
+- [ ] Convert Flask `redirect()` and `url_for()` to FastAPI equivalents
+
+### Request/Response Models
+- [ ] Create Pydantic models for request bodies (replace Flask request parsing)
+- [ ] Create Pydantic models for response schemas
+- [ ] Update form handling to use FastAPI Form dependencies
+- [ ] Convert file upload handling to FastAPI UploadFile
+
+## 🎨 Template and Static Files Migration
+
+### Template Engine Setup
+- [ ] Configure Jinja2Templates in FastAPI application
+- [ ] Set up template directory structure
+- [ ] Create templates directory configuration in FastAPI app
+
+### HTML Template Migration
+- [ ] Review all `.html` files in templates directory
+- [ ] Update template rendering from Flask `render_template()` to FastAPI `templates.TemplateResponse()`
+- [ ] Verify Jinja2 syntax compatibility (should be mostly unchanged)
+- [ ] Update template context passing to match FastAPI pattern
+- [ ] Test all template variables and filters still work correctly
+
+### Static Files Configuration
+- [ ] Configure StaticFiles mount in FastAPI for CSS, JS, images
+- [ ] Update static file URL generation in templates
+- [ ] Verify all CSS file references work correctly
+- [ ] Verify all JavaScript file references work correctly
+- [ ] Test image and other asset serving
+
+## 💻 JavaScript and Frontend Migration
+
+### Inline JavaScript Review
+- [ ] Scan all HTML templates for inline `<script>` tags
+- [ ] Review JavaScript code for Flask-specific URL generation (e.g., `{{ url_for() }}`)
+- [ ] Update AJAX endpoints to match new FastAPI route structure
+- [ ] Convert Flask CSRF token handling to FastAPI security patterns
+
+### External JavaScript Files
+- [ ] Review all `.js` files in static directory
+- [ ] Update API endpoint URLs to match FastAPI routing
+- [ ] Verify fetch() or XMLHttpRequest calls use correct endpoints
+- [ ] Update any Flask-specific JavaScript patterns
+- [ ] Test all JavaScript functionality after migration
+
+### CSS Files Review
+- [ ] Verify all `.css` files are served correctly
+- [ ] Check for any Flask-specific CSS patterns or URL references
+- [ ] Test responsive design and styling after migration
+
+## 🔐 Security and Middleware Migration
+
+### Authentication/Authorization
+- [ ] Convert Flask-Login or similar to FastAPI security dependencies
+- [ ] Update session management (FastAPI doesn't have built-in sessions)
+- [ ] Migrate password hashing and verification
+- [ ] Convert authentication decorators to FastAPI dependencies
+
+### Middleware Migration
+- [ ] Convert Flask middleware to FastAPI middleware
+- [ ] Update error handling from Flask error handlers to FastAPI exception handlers
+- [ ] Migrate request/response interceptors
+- [ ] Update logging middleware if used
+
+## 🧪 Testing and Validation
+
+### Functional Testing
+- [ ] Test all web routes return correct responses
+- [ ] Verify all HTML pages render correctly
+- [ ] Test all forms submit and process data correctly
+- [ ] Verify file uploads work (if applicable)
+- [ ] Test authentication flows (login/logout/registration)
+
+### Frontend Testing
+- [ ] Test all JavaScript functionality
+- [ ] Verify AJAX calls work correctly
+- [ ] Test dynamic content loading
+- [ ] Verify CSS styling is applied correctly
+- [ ] Test responsive design on different screen sizes
+
+### Integration Testing
+- [ ] Test database connectivity and operations
+- [ ] Verify API endpoints return correct data
+- [ ] Test error handling and user feedback
+- [ ] Verify security features work correctly
+
+## 📚 Documentation and Cleanup
+
+### Code Documentation
+- [ ] Update API documentation to reflect FastAPI changes
+- [ ] Add OpenAPI/Swagger documentation (automatic with FastAPI)
+- [ ] Update README with new setup instructions
+- [ ] Document any breaking changes or new patterns
+
+### Code Cleanup
+- [ ] Remove unused Flask imports and dependencies
+- [ ] Clean up any Flask-specific code patterns
+- [ ] Update imports to use FastAPI equivalents
+- [ ] Remove deprecated or unused template files
+- [ ] Clean up static files that are no longer needed
+
+## 🚀 Deployment and Configuration
+
+### Server Configuration
+- [ ] Update server startup to use `uvicorn` instead of Flask development server
+- [ ] Configure production ASGI server (uvicorn, gunicorn with uvicorn workers)
+- [ ] Update any reverse proxy configuration (nginx, Apache)
+- [ ] Test application startup and shutdown
+
+### Environment Configuration
+- [ ] Update environment variables for FastAPI
+- [ ] Configure logging for FastAPI application
+- [ ] Update any deployment scripts or Docker configurations
+- [ ] Test application in different environments (dev, staging, prod)
+
+## ✅ Final Verification
+
+### Complete System Test
+- [ ] Perform end-to-end testing of all user workflows
+- [ ] Verify performance is acceptable or improved
+- [ ] Test error scenarios and edge cases
+- [ ] Confirm all original functionality is preserved
+- [ ] Validate security measures are in place and working
+
+### Monitoring and Observability
+- [ ] Set up health check endpoints
+- [ ] Configure metrics collection (if used)
+- [ ] Set up error monitoring and alerting
+- [ ] Test logging and debugging capabilities
+
+---
+
+## 📝 Migration Notes
+
+### Important FastAPI Concepts to Remember:
+- FastAPI uses async/await by default (but sync functions work too)
+- Automatic request/response validation with Pydantic
+- Built-in OpenAPI documentation
+- Dependency injection system
+- Type hints are crucial for FastAPI functionality
+
+### Common Gotchas:
+- FastAPI doesn't have built-in session support (use external library if needed)
+- Template responses need explicit media_type for HTML
+- Static file mounting needs to be configured explicitly
+- Request object structure is different from Flask
+
+### Performance Considerations:
+- FastAPI is generally faster than Flask
+- Consider using async functions for I/O operations
+- Use background tasks for long-running operations
+- Implement proper caching strategies
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