phg/hosts
0
0
Fork 0
Code Issues 3 Pull requests Projects Releases Packages Wiki Activity Actions

Update project documentation to reflect Phase 2 completion and enhanced features, including configuration management, advanced sorting, and improved visual design.

Browse source
This commit is contained in:
Philip Henning 2025-07-29 21:27:35 +02:00
parent 0051932014
commit fa7e7718c9
5 changed files with 380 additions and 216 deletions
Download patch file Download diff file Expand all files Collapse all files

167
memory-bank/systemPatterns.md
View file

@ -17,17 +17,19 @@
### Component Relationships
#### TUI Layer (`src/hosts/main.py`)
- ✅ **HostsManagerApp**: Complete Textual application with reactive state management
- ✅ **Responsibilities**: User interaction, display logic, event handling, navigation
- ✅ **Dependencies**: Core models and parser for data operations
- ✅ **Implementation**: Two-pane layout with ListView and reactive updates
#### TUI Layer (`src/hosts/main.py` and `src/hosts/tui/`)
- ✅ **HostsManagerApp**: Complete Textual application with reactive state management and DataTable interface
- ✅ **ConfigModal**: Professional modal dialog for configuration management
- ✅ **Responsibilities**: User interaction, display logic, event handling, navigation, configuration UI
- ✅ **Dependencies**: Core models, parser, and config for data operations
- ✅ **Implementation**: Two-pane layout with DataTable, modal system, and rich visual styling
#### Core Layer (`src/hosts/core/`)
- ✅ **models.py**: Complete data structures (HostEntry, HostsFile) with validation
- ✅ **models.py**: Complete data structures (HostEntry, HostsFile) with validation and sorting
- ✅ **parser.py**: Robust hosts file parsing, serialization, and file operations
- ✅ **Responsibilities**: Pure business logic, data validation, file integrity
- ✅ **Implementation**: Comprehensive validation and error handling
- ✅ **config.py**: Configuration management with JSON persistence and default handling
- ✅ **Responsibilities**: Pure business logic, data validation, file integrity, settings management
- ✅ **Implementation**: Comprehensive validation, error handling, and configuration persistence
#### System Layer (Implemented)
- ✅ **File I/O**: Atomic file operations with backup support
@ -69,13 +71,32 @@ class HostsFile:
def sort_by_hostname(self) -> None
def find_entries_by_hostname(self, hostname: str) -> list[HostEntry]
def find_entries_by_ip(self, ip: str) -> list[HostEntry]
# Configuration Management (Implemented)
class Config:
def __init__(self):
self.config_dir = Path.home() / ".config" / "hosts-manager"
self.config_file = self.config_dir / "config.json"
self._settings = self._load_default_settings()
# Implemented methods:
def load(self) -> None
def save(self) -> None
def get(self, key: str, default: Any = None) -> Any
def set(self, key: str, value: Any) -> None
def is_default_entry(self, ip_address: str, hostname: str) -> bool
def should_show_default_entries(self) -> bool
def toggle_show_default_entries(self) -> None
```
### State Management (Implemented)
- ✅ **Reactive state**: Using Textual's reactive attributes for UI updates
- ✅ **Validation pipeline**: All data validated in models and parser
- ✅ **Reactive state**: Using Textual's reactive attributes for complex UI updates
- ✅ **Configuration state**: Persistent settings with JSON storage and graceful error handling
- ✅ **Sorting state**: Reactive sort column and direction with visual indicators
- ✅ **Validation pipeline**: All data validated in models, parser, and configuration
- ✅ **File integrity**: Atomic operations preserve file structure
- ✅ **Error handling**: Graceful degradation for all error conditions
- ✅ **Modal state**: Professional modal dialog lifecycle management
- 🔄 **Undo/Redo capability**: Planned for Phase 4 with command pattern
- 🔄 **Dirty state tracking**: Will be implemented in Phase 3 edit mode
@ -113,11 +134,20 @@ class HostsManagerApp(App):
hosts_file: reactive[HostsFile] = reactive(HostsFile())
selected_entry_index: reactive[int] = reactive(0)
edit_mode: reactive[bool] = reactive(False)
sort_column: reactive[str] = reactive("") # "ip" or "hostname"
sort_ascending: reactive[bool] = reactive(True)
def on_list_view_highlighted(self, event):
def on_data_table_row_highlighted(self, event):
# Automatic UI updates when selection changes
self.selected_entry_index = event.list_view.index or 0
self.selected_entry_index = event.cursor_row
self.update_entry_details()
def on_data_table_header_selected(self, event):
# Interactive column sorting
if "IP Address" in str(event.column_key):
self.action_sort_by_ip()
elif "Canonical Hostname" in str(event.column_key):
self.action_sort_by_hostname()
```
### Data Validation Pattern (Implemented)
@ -155,30 +185,85 @@ class HostsParser:
def __init__(self, file_path: str = "/etc/hosts"):
# Single parser handles all hosts file formats
self.file_path = file_path
# Configuration Factory Pattern (Implemented)
class Config:
def _load_default_settings(self) -> Dict[str, Any]:
# Factory method for default configuration
return {
"show_default_entries": False,
"default_entries": [
{"ip": "127.0.0.1", "hostname": "localhost"},
{"ip": "255.255.255.255", "hostname": "broadcasthost"},
{"ip": "::1", "hostname": "localhost"},
],
"window_settings": {
"last_sort_column": "",
"last_sort_ascending": True,
}
}
```
### Modal Pattern (Implemented)
```python
class ConfigModal(ModalScreen):
def __init__(self, config: Config):
super().__init__()
self.config = config
def action_save(self) -> None:
# Save configuration and close modal
checkbox = self.query_one("#show-defaults-checkbox", Checkbox)
self.config.set("show_default_entries", checkbox.value)
self.config.save()
self.dismiss(True)
def action_cancel(self) -> None:
# Cancel changes and close modal
self.dismiss(False)
```
## Critical Implementation Paths
### Application Startup (✅ Implemented)
1. ✅ **Initialize TUI**: Textual app with reactive state management
2. ✅ **Load hosts file**: Robust parsing with error handling
3. ✅ **Build UI**: Two-pane layout with ListView and details
4. ✅ **Enter main loop**: Smooth keyboard navigation and event handling
5. ✅ **Error handling**: Graceful degradation for file access issues
1. ✅ **Initialize TUI**: Textual app with reactive state management and configuration loading
2. ✅ **Load configuration**: JSON settings with graceful error handling and defaults
3. ✅ **Load hosts file**: Robust parsing with error handling and filtering
4. ✅ **Build UI**: Two-pane layout with DataTable, details, and modal system
5. ✅ **Enter main loop**: Smooth keyboard navigation, sorting, and event handling
6. ✅ **Error handling**: Graceful degradation for file access and configuration issues
### Entry Navigation (✅ Implemented)
1. ✅ **Keyboard navigation**: Up/down arrows navigate entries
2. ✅ **Selection tracking**: Reactive updates to selected_entry_index
3. ✅ **Detail updates**: Automatic refresh of right pane details
4. ✅ **Position restoration**: Maintains cursor position on reload
5. ✅ **Visual feedback**: Clear indication of current selection
1. ✅ **DataTable navigation**: Professional table with cursor and selection tracking
2. ✅ **Keyboard navigation**: Up/down arrows, header clicking, and keyboard shortcuts
3. ✅ **Selection tracking**: Reactive updates to selected_entry_index with DataTable events
4. ✅ **Detail updates**: Automatic refresh of right pane details with rich formatting
5. ✅ **Position restoration**: Maintains cursor position on reload with intelligent matching
6. ✅ **Visual feedback**: Color-coded entries with clear active/inactive indication
### File Operations (✅ Implemented)
1. ✅ **File parsing**: Comprehensive hosts file format support
2. ✅ **Comment preservation**: Maintains all comments and formatting
3. ✅ **Error handling**: Graceful handling of permission and format errors
4. ✅ **Validation**: Complete IP address and hostname validation
5. ✅ **Status feedback**: Clear user feedback for all operations
1. ✅ **File parsing**: Comprehensive hosts file format support with edge case handling
2. ✅ **Comment preservation**: Maintains all comments and formatting perfectly
3. ✅ **Error handling**: Graceful handling of permission, format, and configuration errors
4. ✅ **Validation**: Complete IP address and hostname validation with user feedback
5. ✅ **Status feedback**: Rich status bar with detailed information and operation feedback
6. ✅ **Configuration integration**: Settings-aware parsing and display
### Configuration Management (✅ Implemented)
1. ✅ **Settings loading**: JSON configuration with graceful error handling
2. ✅ **Default management**: Intelligent default entry detection and filtering
3. ✅ **Modal interface**: Professional configuration dialog with keyboard bindings
4. ✅ **Persistence**: Automatic saving to ~/.config/hosts-manager/ directory
5. ✅ **Live updates**: Immediate application of configuration changes
6. ✅ **Error recovery**: Fallback to defaults on configuration errors
### Sorting and Filtering (✅ Implemented)
1. ✅ **Interactive sorting**: Click column headers to sort by IP or hostname
2. ✅ **Sort direction toggle**: Ascending/descending with visual indicators
3. ✅ **Keyboard shortcuts**: Sort by IP (i) and hostname (n) keys
4. ✅ **Visual feedback**: Sort arrows in column headers showing current state
5. ✅ **Default entry filtering**: Hide/show system entries based on configuration
6. ✅ **Intelligent IP sorting**: Proper IPv4/IPv6 numerical sorting
### Edit Mode Activation (🔄 Planned for Phase 3)
1. 🔄 **User triggers edit mode**: Keyboard shortcut implementation
@ -213,19 +298,25 @@ class HostsParser:
## Error Handling Patterns
### Graceful Degradation
- **Permission denied**: Fall back to read-only mode
- **DNS resolution failure**: Show error but continue
- **File corruption**: Load what's possible, warn user
- **Network unavailable**: Disable DNS features
- **Permission denied**: Fall back to read-only mode with clear status indication
- **Configuration errors**: Use defaults and continue with warning
- **File corruption**: Load what's possible, warn user, maintain functionality
- **DNS resolution failure**: Show error but continue (planned for Phase 5)
- **Network unavailable**: Disable DNS features (planned for Phase 5)
### User Feedback
- **Status bar**: Show current mode and operation status
- **Modal dialogs**: For errors requiring user attention
- **Inline validation**: Real-time feedback on input
- **Progress indicators**: For long-running operations
- **Rich status bar**: Show current mode, entry counts, file path, and operation status
- **Modal dialogs**: Professional configuration interface with proper keyboard handling
- **Color-coded entries**: Visual distinction between active/inactive entries
- **Sort indicators**: Visual arrows showing current sort column and direction
- **Interactive headers**: Click feedback and hover states for column sorting
- **Progress indicators**: For long-running operations (planned for Phase 3)
### Recovery Mechanisms
- **Undo operations**: Allow reverting recent changes
- **File restoration**: Restore from backup if available
- **Configuration fallback**: Automatic fallback to defaults on configuration errors
- **Position restoration**: Intelligent cursor position maintenance on reload
- **Error isolation**: Configuration errors don't affect core functionality
- **Undo operations**: Allow reverting recent changes (planned for Phase 4)
- **File restoration**: Restore from backup if available (planned for Phase 3)
- **Safe mode**: Minimal functionality if errors occur
- **Graceful exit**: Always attempt to save valid changes
- **Graceful exit**: Always attempt to save valid changes and configuration