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diff --git a/REFACTORING_SUMMARY.md b/REFACTORING_SUMMARY.md new file mode 100644 index 0000000..86fdb2a --- /dev/null +++ b/REFACTORING_SUMMARY.md @@ -0,0 +1,143 @@ +# Refactoring Summary + +## β
Completed Refactoring Tasks + +All refactoring recommendations have been successfully implemented. The codebase now has a clean separation of concerns and reduced redundancy. + +### π New Files Created + +1. **`config.py`** - Centralized configuration and constants +2. **`date_service.py`** - Centralized date operations and utilities +3. **`file_service.py`** - Centralized file operations with error handling +4. **`event_type_handler.py`** - Business rules for event types +5. **`calendar_entry.py`** - Calendar entry data model (extracted from calendar_manager.py) + +### π Refactored Files + +1. **`date_calculator.py`** - Now contains only pure mathematical operations +2. **`prediction_controller.py`** - Enhanced with proper business logic orchestration +3. **`calendar_manager.py`** - Simplified to focus on CRUD operations and data integrity +4. **`calendar_gui.py`** - Cleaned to remove business logic, now pure UI layer +5. **`test.py`** - Updated to work with refactored architecture + +## π― Key Improvements Achieved + +### 1. **Separation of Concerns** +- **DateCalculator**: Pure mathematical operations only +- **PredictionController**: Business logic orchestration +- **CalendarManager**: CRUD operations and data integrity +- **CalendarManagerGUI**: Pure UI presentation +- **EventTypeHandler**: Event type-specific business rules +- **DateService**: Date utilities and formatting +- **FileService**: File operations with error handling + +### 2. **Eliminated Code Duplication** +- β
Centralized keyword definitions in `config.py` +- β
Centralized date formatting in `DateService` +- β
Centralized EZ pauschal duration logic in `EventTypeHandler` +- β
Centralized file operations in `FileService` + +### 3. **Improved Maintainability** +- β
Clear class responsibilities +- β
Better error handling +- β
Input validation +- β
Type hints throughout +- β
Comprehensive documentation + +### 4. **Enhanced Testability** +- β
Pure functions in `DateCalculator` +- β
Isolated business logic in `EventTypeHandler` +- β
Mockable services +- β
Comprehensive test coverage + +## ποΈ New Architecture + +``` +βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ +β UI Layer (calendar_gui.py) β +βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ€ +β Business Logic Layer β +β βββββββββββββββββββ βββββββββββββββββββββββββββββββββββ β +β βPredictionControllerβ β EventTypeHandler β β +β βββββββββββββββββββ βββββββββββββββββββββββββββββββββββ β +βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ€ +β Data Layer β +β βββββββββββββββββββ βββββββββββββββββββββββββββββββββββ β +β β CalendarManager β β DateCalculator β β +β βββββββββββββββββββ βββββββββββββββββββββββββββββββββββ β +βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ€ +β Service Layer β +β βββββββββββββββββββ βββββββββββββββββββββββββββββββββββ β +β β DateService β β FileService β β +β βββββββββββββββββββ βββββββββββββββββββββββββββββββββββ β +βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ€ +β Configuration Layer β +β βββββββββββββββββββ βββββββββββββββββββββββββββββββββββ β +β β Config β β CalendarEntry β β +β βββββββββββββββββββ βββββββββββββββββββββββββββββββββββ β +βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ +``` + +## π§ͺ Testing Results + +- β
All tests pass successfully +- β
GUI launches without errors +- β
Prediction calculation works correctly +- β
Event type handling functions properly +- β
Date calculations are accurate +- β
File operations work as expected + +## π Code Quality Metrics + +### Before Refactoring: +- **Classes**: 4 (DateCalculator, CalendarManager, PredictionController, CalendarManagerGUI) +- **Responsibilities per class**: Mixed concerns +- **Code duplication**: High (keywords, date logic, business rules) +- **Testability**: Poor (tightly coupled) + +### After Refactoring: +- **Classes**: 8 (well-separated concerns) +- **Responsibilities per class**: Single responsibility +- **Code duplication**: Eliminated +- **Testability**: Excellent (loosely coupled, pure functions) + +## π Benefits Realized + +1. **Maintainability**: Each class has a single, clear responsibility +2. **Reusability**: Services can be reused across components +3. **Testability**: Pure functions and isolated business logic +4. **Extensibility**: Easy to add new event types or modify business rules +5. **Error Handling**: Centralized error handling in services +6. **Type Safety**: Comprehensive type hints throughout +7. **Documentation**: Clear docstrings and comments + +## π§ Usage Examples + +### Adding a new event type: +```python +# In config.py +KEYWORDS = ["EZ 100%", "EZ 50%", "EZ pauschal", "Sonstige", "NEW_TYPE"] + +# In event_type_handler.py +def get_duration_for_type(event_type: str, start_date: datetime) -> datetime: + if event_type == "NEW_TYPE": + return start_date + relativedelta(months=6) + # ... existing logic +``` + +### Using the services: +```python +# Date operations +formatted_date = DateService.format_date_for_display(date) +parsed_date = DateService.parse_date_from_string("2023-01-01") + +# File operations +success = FileService.save_calendar_to_file(entries, "data.json") +entries = FileService.load_calendar_from_file("data.json") + +# Event type handling +is_valid = EventTypeHandler.validate_event_type("EZ 100%") +accounted_time = EventTypeHandler.calculate_accounted_time(entry) +``` + +The refactoring has successfully transformed the codebase into a well-structured, maintainable, and extensible application following clean architecture principles. |