This refactoring decomposes the deep entity inheritance hierarchy into a more flexible trait-based architecture. This provides better code reusability, composition, and maintainability.
- Simplified to just use the trait instead of duplicating code
2.**AbstractNamedDBElement**
- Now uses `NamedElementTrait` in addition to existing `TimestampTrait`
- Cleaner implementation with trait composition
3.**AttachmentContainingDBElement**
- Now uses `AttachmentsTrait` and `MasterAttachmentTrait`
- Simplified constructor and clone methods
4.**AbstractStructuralDBElement**
- Now uses `StructuralElementTrait` and `ParametersTrait`
- Implements `StructuralElementInterface` and `HasParametersInterface`
- Much cleaner with most functionality extracted to trait
5.**AbstractCompany**
- Now uses `CompanyTrait`
- Implements `CompanyInterface`
- Significantly simplified from ~260 lines to ~20 lines
## Benefits
### 1. **Better Code Reusability**
- Traits can be reused in different contexts without requiring inheritance
- Easier to mix and match functionality
### 2. **Improved Maintainability**
- Each trait focuses on a single concern (SRP - Single Responsibility Principle)
- Easier to locate and modify specific functionality
- Reduced code duplication
### 3. **More Flexible Architecture**
- Entities can now compose functionality as needed
- Not locked into a rigid inheritance hierarchy
- Easier to add new functionality without modifying base classes
### 4. **Better Testability**
- Traits can be tested independently
- Easier to mock specific functionality
### 5. **Clearer Contracts**
- Interfaces make dependencies explicit
- Better IDE support and type hinting
## Migration Path
This refactoring is backward compatible - all existing entities continue to work as before. The changes are internal to the base classes and do not affect the public API.
### For New Entities
New entities can now:
1. Use traits directly without deep inheritance
2. Mix and match functionality as needed
3. Implement only the interfaces they need
Example:
```php
class MyCustomEntity extends AbstractDBElement implements NamedElementInterface
{
use NamedElementTrait;
// Custom functionality
}
```
## Technical Details
### Trait Usage Pattern
All traits follow this pattern:
1. Declare properties with appropriate Doctrine/validation annotations
2. Provide initialization methods (e.g., `initializeAttachments()`)
3. Provide business logic methods
4. Provide clone helpers for deep cloning when needed
### Interface Contracts
All interfaces define the minimal contract required for that functionality:
