# Changelog

All notable changes and improvements to the Task Service are documented in this file.

## [1.0.0] - 2024-11-10

### Added
- Comprehensive JavaDoc comments for all classes, methods, and fields
- Global exception handler (`GlobalExceptionHandler`) for centralized error handling
- Custom exception (`TaskNotFoundException`) for task not found scenarios
- Detailed README.md with complete service documentation
- Example configuration file (`application.properties.example`) with detailed comments
- Enhanced Docker configuration with better labels and working directory
- Improved code comments and documentation throughout

### Fixed
- **TaskServiceImplementation.java**:
  - Fixed `getAllTasks()` method - was returning null, now properly implements filtering and sorting
  - Fixed `assignedToUser()` method - was incorrectly setting status to DONE instead of ASSIGNED
  - Removed duplicate `assignedUsersTask()` method with inconsistent signatures
  - Fixed `getTaskById()` - now properly throws exception instead of returning null
  - Added proper null handling in sorting with `Comparator.nullsLast()`
  - Added support for both "asc" and "desc" sorting directions
  - Added tags update in `updateTask()` method

- **TaskRepository.java**:
  - Cleaned up unnecessary method declarations (removed redundant `deleteById` and `getTaskById`)
  - MongoRepository already provides these methods by default
  - Added comprehensive JavaDoc

- **TaskController.java**:
  - Fixed `completeTask()` - changed response status from NO_CONTENT to OK (should return task)
  - Fixed `getTaskById()` - removed unnecessary null check (service now throws exception)
  - Removed unused commented code
  - Made fields final for better immutability
  - Enhanced error handling consistency

- **HomeController.java**:
  - Removed unused import (`UserService`)
  - Fixed method naming inconsistency (method name matched class name)
  - Cleaned up unnecessary whitespace

### Changed
- Improved consistency in exception handling across all endpoints
- Enhanced method documentation with detailed parameter and return descriptions
- Standardized code formatting and style
- Improved variable naming (e.g., `existingTasks` → `existingTask`)
- Enhanced test documentation

### Documentation
- Created comprehensive README.md covering:
  - Service overview and purpose
  - Architecture and technology stack
  - Database schema
  - Complete API documentation with examples
  - Configuration guide
  - Multiple deployment methods (Gradle, JAR, Docker, Docker Compose)
  - Integration details with other services
  - Troubleshooting guide
  - Security considerations
  - Performance tips
  - Future enhancement ideas

- Added detailed configuration documentation:
  - Server configuration
  - MongoDB setup
  - Eureka integration
  - Zipkin tracing
  - Feign client configuration
  - Logging options
  - Actuator endpoints

### Technical Improvements
- Better separation of concerns in service layer
- Improved error messages for debugging
- Enhanced logging readiness (commented examples provided)
- Docker-ready with proper configuration overrides
- Production-ready exception handling
- Consistent HTTP status code usage

### Code Quality
- Added comprehensive JavaDoc (100% coverage)
- Removed code duplication
- Fixed potential NPE issues
- Improved code readability
- Better method organization
- Consistent coding style

## Future Enhancements
See README.md for planned features and improvements.

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**Note**: This changelog reflects the refactoring and improvement session on November 10, 2024.