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geutebruck/geutebruck-api/specs/001-flutter-app/constitution.md
Administrator 14893e62a5 feat: Geutebruck GeViScope/GeViSoft Action Mapping System - MVP
This MVP release provides a complete full-stack solution for managing action mappings
in Geutebruck's GeViScope and GeViSoft video surveillance systems.

## Features

### Flutter Web Application (Port 8081)
- Modern, responsive UI for managing action mappings
- Action picker dialog with full parameter configuration
- Support for both GSC (GeViScope) and G-Core server actions
- Consistent UI for input and output actions with edit/delete capabilities
- Real-time action mapping creation, editing, and deletion
- Server categorization (GSC: prefix for GeViScope, G-Core: prefix for G-Core servers)

### FastAPI REST Backend (Port 8000)
- RESTful API for action mapping CRUD operations
- Action template service with comprehensive action catalog (247 actions)
- Server management (G-Core and GeViScope servers)
- Configuration tree reading and writing
- JWT authentication with role-based access control
- PostgreSQL database integration

### C# SDK Bridge (gRPC, Port 50051)
- Native integration with GeViSoft SDK (GeViProcAPINET_4_0.dll)
- Action mapping creation with correct binary format
- Support for GSC and G-Core action types
- Proper Camera parameter inclusion in action strings (fixes CrossSwitch bug)
- Action ID lookup table with server-specific action IDs
- Configuration reading/writing via SetupClient

## Bug Fixes
- **CrossSwitch Bug**: GSC and G-Core actions now correctly display camera/PTZ head parameters in GeViSet
- Action strings now include Camera parameter: `@ PanLeft (Comment: "", Camera: 101028)`
- Proper filter flags and VideoInput=0 for action mappings
- Correct action ID assignment (4198 for GSC, 9294 for G-Core PanLeft)

## Technical Stack
- **Frontend**: Flutter Web, Dart, Dio HTTP client
- **Backend**: Python FastAPI, PostgreSQL, Redis
- **SDK Bridge**: C# .NET 8.0, gRPC, GeViSoft SDK
- **Authentication**: JWT tokens
- **Configuration**: GeViSoft .set files (binary format)

## Credentials
- GeViSoft/GeViScope: username=sysadmin, password=masterkey
- Default admin: username=admin, password=admin123

## Deployment
All services run on localhost:
- Flutter Web: http://localhost:8081
- FastAPI: http://localhost:8000
- SDK Bridge gRPC: localhost:50051
- GeViServer: localhost (default port)

Generated with Claude Code (https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2025-12-31 18:10:54 +01:00

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4.7 KiB
Markdown

# Flutter App Constitution
## Purpose
This document establishes the foundational principles and standards for developing the Geutebruck API Flutter mobile application. These guidelines ensure code quality, maintainability, and exceptional user experience.
## Core Principles
### 1. Code Quality
- **Clean Code**: Follow Flutter and Dart style guides (effective_dart)
- **Modularity**: Organize code into reusable widgets and services
- **Separation of Concerns**: Implement clear boundaries between UI, business logic, and data layers
- **DRY Principle**: Avoid code duplication through proper abstraction
- **SOLID Principles**: Apply object-oriented design principles where appropriate
### 2. Architecture
- **Pattern**: Use **BLoC (Business Logic Component)** pattern for state management
- Separates presentation from business logic
- Testable and predictable state management
- Reactive programming with streams
- **Layered Architecture**:
- **Presentation Layer**: Widgets and UI components
- **Business Logic Layer**: BLoCs and Cubits
- **Data Layer**: Repositories and data sources
- **Domain Layer**: Models and business entities
### 3. Testing Standards
- **Test Coverage**: Minimum 80% code coverage
- **Test Types**:
- **Unit Tests**: All business logic, repositories, and utilities
- **Widget Tests**: All custom widgets and screens
- **Integration Tests**: Critical user flows
- **Test-Driven Development (TDD)**: Write tests before implementation where feasible
- **Mocking**: Use mockito for dependency injection in tests
### 4. User Experience
- **Material Design 3**: Follow Material Design guidelines for consistency
- **Responsive Design**: Support multiple screen sizes (phones, tablets)
- **Accessibility**: Support screen readers, proper contrast ratios, semantic labels
- **Performance**:
- App startup time < 3 seconds
- List scrolling at 60 FPS
- Image loading with progressive rendering
- Efficient API calls with caching
- **Offline-First**: Cache data locally, sync when online
- **Error Handling**: Graceful error messages with retry options
### 5. Security
- **Secure Storage**: Use flutter_secure_storage for sensitive data (JWT tokens, passwords)
- **HTTPS Only**: All API communication over TLS
- **Token Management**: Automatic token refresh before expiration
- **Input Validation**: Sanitize all user inputs
- **No Hardcoded Secrets**: Use environment variables and configuration files
### 6. API Integration
- **REST Client**: Use dio package for HTTP requests
- **Error Handling**: Standardized error parsing and user-friendly messages
- **Retry Logic**: Automatic retry with exponential backoff for failed requests
- **Request Cancellation**: Cancel pending requests on screen navigation
- **Response Caching**: Implement caching strategy for frequently accessed data
### 7. Code Organization
```
lib/
├── core/
│ ├── constants/
│ ├── errors/
│ ├── network/
│ └── utils/
├── data/
│ ├── models/
│ ├── repositories/
│ └── data_sources/
├── domain/
│ ├── entities/
│ └── repositories/
├── presentation/
│ ├── blocs/
│ ├── screens/
│ └── widgets/
└── main.dart
```
### 8. Dependency Management
- **Minimal Dependencies**: Only add well-maintained, popular packages
- **Version Locking**: Use exact versions in pubspec.yaml
- **Regular Updates**: Review and update dependencies monthly
- **Null Safety**: Enforce sound null safety
### 9. Documentation
- **Code Comments**: Document complex logic and non-obvious decisions
- **API Documentation**: Generate documentation using dartdoc
- **README**: Comprehensive setup and running instructions
- **Change Log**: Document all changes in CHANGELOG.md
### 10. Version Control
- **Git Flow**: Use feature branches with descriptive names
- **Commit Messages**: Follow conventional commits format
- **Pull Requests**: Require code review before merging
- **CI/CD**: Automated testing and deployment pipelines
## Governance
### Technical Decisions
- Architecture changes require team consensus
- New dependencies require justification and approval
- Breaking changes require migration plan
### Code Review Standards
- All code must be reviewed before merging
- Reviewers check for:
- Adherence to principles
- Test coverage
- Code clarity and documentation
- Performance implications
### Performance Budgets
- App size: < 50MB
- Memory usage: < 200MB during normal operation
- Network requests: Batched and optimized
- Battery consumption: Minimal background activity
## Exceptions
Exceptions to these principles require:
1. Clear justification
2. Documentation of trade-offs
3. Approval from technical lead
4. Technical debt tracking