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Implement command pattern for undo/redo functionality in HostsManager

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- Added command classes: ToggleEntryCommand, MoveEntryCommand, AddEntryCommand, DeleteEntryCommand, UpdateEntryCommand.
- Integrated UndoRedoHistory to manage command execution and history.
- Updated HostsManager to use command-based methods for editing entries with undo/redo support.
- Enhanced HostsManagerApp to display undo/redo status and handle undo/redo actions via keyboard shortcuts.
- Refactored navigation handler to utilize command-based methods for toggling and moving entries.
- Created comprehensive tests for command classes and integration with HostsManager.
This commit is contained in:
Philip Henning 2025-08-17 21:30:01 +02:00
parent 77d4a2e955
commit bc0f8b99e8
8 changed files with 1461 additions and 55 deletions
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memory-bank/activeContext.md
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@ -2,25 +2,20 @@
## Current Work Focus
**Phase 4 Advanced Edit Features Largely Complete**: Successfully implemented all major Phase 4 features including add/delete entries, inline editing, and search functionality. The application now has comprehensive edit capabilities with modular TUI architecture and advanced user interface. Ready for Phase 5 advanced features and Polish phase.
**Phase 4 Advanced Edit Features Complete**: Successfully implemented all Phase 4 features including add/delete entries, inline editing, search functionality, and comprehensive undo/redo system. The application now has complete edit capabilities with modular TUI architecture, command pattern implementation, and professional user interface. Ready for Phase 5 advanced features.
## Immediate Next Steps
### Priority 1: Phase 4 Completion (Minor Features)
1. **Test fixes**: Resolve 3 failing tests (footer/status bar and keybinding updates)
2. **Documentation updates**: Update keybinding documentation to reflect current implementation
### Priority 2: Phase 5 Advanced Features
### Priority 1: Phase 5 Advanced Features
1. **DNS resolution**: Resolve hostnames to IP addresses with comparison
2. **CNAME support**: Store DNS names alongside IP addresses
3. **Advanced filtering**: Filter by active/inactive status
4. **Import/Export**: Support for different file formats
### Priority 3: Phase 6 Polish
### Priority 2: Phase 6 Polish
1. **Bulk operations**: Select and modify multiple entries
2. **Undo/Redo functionality**: Command pattern for operation history
3. **Performance optimization**: Testing with large hosts files
4. **Accessibility**: Screen reader support and keyboard accessibility
2. **Performance optimization**: Testing with large hosts files
3. **Accessibility**: Screen reader support and keyboard accessibility
## Recent Changes
@ -51,6 +46,27 @@ Successfully implemented DataTable-based entry details with consistent field ord
- **Labeled rows**: Uses DataTable labeled rows feature for clean presentation
- **Professional appearance**: Table format matching main entries table
### Phase 4 Undo/Redo System ✅ COMPLETED
Successfully implemented comprehensive undo/redo functionality using the Command pattern:
**Command Pattern Implementation:**
- **Abstract Command class**: Base interface with execute/undo methods and operation descriptions
- **OperationResult dataclass**: Standardized result handling with success, message, and optional data
- **UndoRedoHistory manager**: Stack-based operation history with configurable limits (default 50 operations)
- **Concrete command classes**: Complete implementations for all edit operations:
- ToggleEntryCommand: Toggle active/inactive status with reversible operations
- MoveEntryCommand: Move entries up/down with position restoration
- AddEntryCommand: Add entries with removal capability for undo
- DeleteEntryCommand: Remove entries with restoration capability
- UpdateEntryCommand: Modify entry fields with original value restoration
**Integration and User Interface:**
- **HostsManager integration**: All edit operations now use command pattern with execute/undo methods
- **Keyboard shortcuts**: Ctrl+Z for undo, Ctrl+Y for redo operations
- **UI feedback**: Status bar shows undo/redo availability and operation descriptions
- **History management**: Operations cleared on edit mode exit, failed operations not stored
- **Comprehensive testing**: 43 test cases covering all command operations and edge cases
### Phase 3 Edit Mode Complete ✅ COMPLETE
- ✅ **Permission management**: Complete PermissionManager class with sudo request and validation
- ✅ **Edit mode toggle**: Safe transition between read-only and edit modes with 'e' key