Summary

This PR reduces direct dependencies on Container::getInstance() static calls throughout the Laravel framework by introducing proper dependency injection patterns and a new container interaction trait.

Changes Made

New Container Interaction Foundation

• InteractsWithContainer trait: Comprehensive utility for container-aware classes providing:
  • Container instance management with fallback to getInstance()
  • Common container operations (resolve, bind, singleton, instance)
  • Method binding support for advanced container features
  • Consistent API across container-aware classes

Updated Components

Database Layer (DetectsConcurrencyErrors)

• Added container injection support with fallback mechanism
• Introduced setConcurrencyContainer() method for dependency injection
• Maintained backward compatibility with getInstance() fallback

Console Scheduling (Schedule)

• Updated constructor to accept optional container parameter
• Improved testability through dependency injection
• Preserved existing behavior for backward compatibility

HTTP Layer (UploadedFile)

• Integrated InteractsWithContainer trait
• Replaced direct Container::getInstance() calls with trait methods
• Enhanced testability and reduced static dependencies

Key Features

Improved Dependency Injection

• Reduced coupling to static Container::getInstance() calls
• Enhanced testability through injectable dependencies
• Better separation of concerns with container abstraction

Backward Compatibility

• All changes maintain full backward compatibility
• Fallback mechanisms preserve existing behavior
• No breaking changes for existing applications

Enhanced Testability

• Mockable container dependencies for unit testing
• Easier service substitution and testing isolation
• Better support for dependency injection in tests

Consistent Container API

• Unified approach to container interactions
• Standardized methods across container-aware classes
• Reduced code duplication in container operations

Benefits

• Better Architecture: Reduced static dependencies improve code design
• Enhanced Testability: Easier mocking and testing of container-dependent code
• Improved Maintainability: Cleaner separation of concerns
• Greater Flexibility: Easier service substitution and customization
• Future-Proof: Foundation for further dependency injection improvements

Container Operations Provided

The InteractsWithContainer trait offers:

• resolve() - Service resolution with type hints
• bound() - Service binding checks
• bind() - Service binding registration
• singleton() - Singleton binding registration
• instance() - Instance registration
• call() - Method injection and calling
• hasMethodBinding() / callMethodBinding() - Advanced method binding support

Testing

• All existing tests pass
• Container injection works correctly
• Fallback mechanisms function as expected
• No performance impact observed

Migration Path

For developers wanting to adopt the new patterns:

// Before
$service = Container::getInstance()->make(SomeService::class);

// After (using the trait)
$service = $this->resolve(SomeService::class);

This enhancement establishes a foundation for better dependency injection patterns throughout the Laravel framework while maintaining complete backward compatibility.