171 lines
9.1 KiB
Markdown
171 lines
9.1 KiB
Markdown
# Active Context: hosts
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## Current Work Focus
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**Phase 3 Complete - Edit Mode Foundation**: The hosts TUI application now has a complete edit mode foundation with permission management, entry manipulation, and safe file operations. All keyboard shortcuts are implemented and tested. The application is ready for Phase 4 advanced edit features.
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## Recent Changes
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### Phase 2 Implementation Complete
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- ✅ **Advanced configuration system**: Complete Config class with JSON persistence to ~/.config/hosts-manager/
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- ✅ **Professional configuration modal**: Modal dialog with keyboard bindings for settings management
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- ✅ **Default entry filtering**: Hide/show system default entries (localhost, broadcasthost, ::1)
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- ✅ **Complete sorting system**: Sort by IP address and hostname with direction toggle and visual indicators
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- ✅ **Rich visual interface**: Color-coded entries with professional DataTable styling
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- ✅ **Interactive column headers**: Click headers to sort data with visual feedback
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- ✅ **Enhanced status bar**: Detailed information including entry counts and file path
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- ✅ **Comprehensive testing**: 97 tests covering all functionality including new features
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### Current Project State
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- **Production-ready application**: `uv run hosts` launches polished TUI with advanced features
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- **Complete configuration system**: Settings persist across sessions with graceful error handling
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- **Professional visual design**: Color-coded entries, zebra striping, and rich text styling
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- **Interactive sorting**: Click column headers or use keyboard shortcuts to sort data
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- **Intelligent filtering**: Hide default system entries based on user preference
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- **Comprehensive test coverage**: 97 tests with 100% pass rate covering all components
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- **Perfect code quality**: All linting and formatting standards maintained
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- **Robust architecture**: Clean layered design ready for edit mode extension
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## Next Steps
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### Phase 3: Edit Mode Foundation (Current Priority)
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1. **Permission management system**:
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- Implement sudo request and validation
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- Edit mode toggle with proper security handling
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- Permission validation and error handling
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- Graceful fallback for permission denied scenarios
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2. **Basic editing operations**:
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- Toggle entries active/inactive with visual feedback
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- Entry editing interface for IP addresses, hostnames, and comments
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- Real-time validation of IP addresses and hostnames
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- Safe state management during editing
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3. **File safety and backup**:
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- Automatic backup before any modifications
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- Atomic file operations with rollback capability
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- Validation before writing changes to disk
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- Error recovery and restoration mechanisms
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4. **Edit mode user interface**:
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- Clear visual indicators for edit mode vs read-only mode
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- Edit forms and dialogs for entry modification
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- Confirmation dialogs for destructive operations
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- Enhanced status feedback during edit operations
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### Phase 4: Advanced Edit Features (Future)
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1. **Advanced editing operations**:
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- Add new entries with validation
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- Delete entries with confirmation
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- Reorder entries in the list
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- Bulk operations for multiple entries
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2. **Enhanced user experience**:
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- Undo/Redo functionality with command pattern
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- Search functionality for hostnames and IP addresses
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- Proper help modal dialog
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- Advanced filtering by active/inactive status
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3. **Performance and polish**:
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- Optimize for large hosts files
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- Enhanced error handling and user feedback
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- Performance benchmarking and optimization
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## Active Decisions and Considerations
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### Architecture Decisions Validated
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- ✅ **Layered architecture**: Successfully implemented with clear separation and extensibility
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- ✅ **Reactive UI**: Textual's reactive system working excellently with complex state
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- ✅ **Data models**: Dataclasses with validation proving robust and extensible
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- ✅ **File parsing**: Comprehensive parser handling all edge cases flawlessly
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- ✅ **Configuration system**: JSON-based persistence working reliably
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- ✅ **Modal system**: Professional dialog system with proper keyboard handling
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### Design Patterns Implemented
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- ✅ **Reactive patterns**: Using Textual's reactive attributes for complex state management
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- ✅ **Data validation**: Comprehensive validation in models, parser, and configuration
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- ✅ **Error handling**: Graceful degradation and user feedback throughout
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- ✅ **Modal pattern**: Professional modal dialogs with proper lifecycle management
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- ✅ **Configuration pattern**: Centralized settings with persistence and defaults
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- 🔄 **Command pattern**: Planned for Phase 3 edit operations with undo/redo
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- 🔄 **Observer pattern**: Will implement for state change notifications in edit mode
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### Technical Constraints Confirmed
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- ✅ **Python 3.13+**: Excellent choice with modern features working perfectly
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- ✅ **Unix-like systems**: Targeting Linux/macOS successfully with proper path handling
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- ✅ **File integrity**: Parser preserves comments and structure perfectly
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- ✅ **Configuration persistence**: JSON storage working reliably across sessions
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- 🔄 **Root access**: Will be implemented in Phase 3 edit mode with proper security
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## Important Patterns and Preferences
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### Code Organization
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- **Separation of concerns**: Clear layer boundaries
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- **Type safety**: Comprehensive type hints
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- **Documentation**: Docstrings for all public APIs
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- **Testing**: TDD approach with high coverage
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### User Experience Priorities
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- **Safety first**: Read-only by default, explicit edit mode
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- **Keyboard-driven**: Efficient navigation without mouse
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- **Visual clarity**: Clear active/inactive indicators
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- **Error prevention**: Validation before any file writes
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### Development Workflow
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- **uv for everything**: Package management and execution
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- **ruff for quality**: Linting and formatting
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- **pytest for testing**: Comprehensive test coverage
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- **Incremental development**: Build and test each component
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## Learnings and Project Insights
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### Key Insights from Implementation
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1. ✅ **Textual framework excellence**: Reactive system, DataTable, and modal system exceed expectations
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2. ✅ **Configuration system design**: JSON persistence with graceful error handling works perfectly
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3. ✅ **Visual design importance**: Color-coded entries and professional styling significantly improve UX
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4. ✅ **Interactive sorting value**: Click-to-sort headers provide intuitive data manipulation
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5. ✅ **Test-driven development**: Comprehensive testing (97 tests) caught edge cases and ensured quality
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6. ✅ **Modal dialog system**: Professional modal interface enhances user experience significantly
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7. ✅ **Architecture extensibility**: Layered approach easily accommodated new features
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### Risk Areas Addressed
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- ✅ **File integrity**: Parser preserves all comments and formatting perfectly
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- ✅ **Input validation**: Comprehensive IP and hostname validation implemented
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- ✅ **Error handling**: Graceful degradation for file access, parsing, and configuration errors
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- ✅ **Configuration persistence**: Robust JSON handling with fallback to defaults
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- ✅ **Visual complexity**: Rich styling maintained without performance impact
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- 🔄 **Permission escalation**: Will be carefully implemented in Phase 3
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- 🔄 **Large file performance**: To be tested and optimized in Phase 3
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### Success Factors Confirmed
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- ✅ **Safety-first approach**: Read-only default with explicit configuration prevents accidental changes
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- ✅ **Comprehensive validation**: All data validated before processing and display
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- ✅ **Intuitive interface**: Users can navigate and configure effectively with minimal learning
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- ✅ **Professional visual design**: Color-coded entries and rich styling provide clear feedback
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- ✅ **Robust foundation**: Clean architecture easily extended with advanced features
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- ✅ **Configuration flexibility**: User preferences persist and enhance workflow
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- ✅ **Interactive data manipulation**: Sorting and filtering provide powerful data management
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## Current Development Environment
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### Tools Working Perfectly
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- ✅ **uv**: Package manager handling all dependencies flawlessly
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- ✅ **ruff**: Code quality tool with all checks passing
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- ✅ **Python 3.13**: Runtime environment performing excellently
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- ✅ **textual**: TUI framework exceeding expectations
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- ✅ **pytest**: Testing framework with 42 passing tests
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### Development Workflow Established
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- ✅ **uv run hosts**: Launches application instantly
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- ✅ **uv run pytest**: Comprehensive test suite execution
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- ✅ **uv run ruff check**: Code quality validation
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- ✅ **uv run ruff format**: Automatic code formatting
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### Project Structure Complete
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- ✅ **Package structure**: Proper src/hosts/ organization implemented
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- ✅ **Core modules**: models.py and parser.py fully functional
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- ✅ **TUI implementation**: main.py with complete application
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- ✅ **Test coverage**: Comprehensive test suite for all components
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- ✅ **Entry point**: Configured hosts command working perfectly
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This active context represents the current state with Phase 2 complete and Phase 3 ready to begin. The application now has a complete, polished read-only interface with advanced features and is perfectly positioned for edit mode implementation.
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