platform/doc/pipeline_gap_analysis.md

Pipeline Package Gap Analysis

Overview

This document analyzes the gaps between our Pipeline package's actual implementation and our documentation, identifying areas that need implementation or documentation updates.

Related Documentation

• See Pipeline Package Specification for current implementation
• See Laravel Compatibility Roadmap for overall status
• See Foundation Integration Guide for integration patterns
• See Testing Guide for testing approaches
• See Getting Started Guide for development setup

Implementation Gaps

1. Missing Laravel Features

// Documented but not implemented:

// 1. Pipeline Hub
class PipelineHub {
  // Need to implement:
  Pipeline pipeline(String name);
  void defaults(List<Pipe> pipes);
  Pipeline middleware();
  Pipeline bus();
}

// 2. Pipeline Conditions
class Pipeline {
  // Need to implement:
  Pipeline when(bool Function() callback);
  Pipeline unless(bool Function() callback);
  Pipeline whenCallback(Function callback);
}

// 3. Pipeline Caching
class Pipeline {
  // Need to implement:
  void enableCache();
  void clearCache();
  dynamic getCached(String key);
}

2. Existing Features Not Documented

// Implemented but not documented:

// 1. Type Registration
class Pipeline {
  /// Registers pipe types for string resolution
  void registerPipeType(String name, Type type);
  
  /// Type map for string resolution
  final Map<String, Type> _typeMap = {};
}

// 2. Method Invocation
class Pipeline {
  /// Invokes methods on pipe instances
  Future<dynamic> invokeMethod(
    dynamic instance,
    String methodName,
    List<dynamic> arguments
  );
  
  /// Sets method to call on pipes
  Pipeline via(String method);
}

// 3. Exception Handling
class Pipeline {
  /// Logger for pipeline
  final Logger _logger;
  
  /// Handles exceptions in pipeline
  dynamic handleException(dynamic passable, Object e);
}

3. Integration Points Not Documented

// 1. Container Integration
class Pipeline {
  /// Container reference
  final Container? _container;
  
  /// Gets container instance
  Container getContainer();
  
  /// Sets container instance
  Pipeline setContainer(Container container);
}

// 2. Reflection Integration
class Pipeline {
  /// Resolves pipe types using mirrors
  Type? _resolvePipeType(String pipeClass) {
    try {
      for (var lib in currentMirrorSystem().libraries.values) {
        // Reflection logic...
      }
    } catch (_) {}
  }
}

// 3. Logging Integration
class Pipeline {
  /// Logger instance
  final Logger _logger;
  
  /// Logs pipeline events
  void _logPipelineEvent(String message, [Object? error]);
}

Documentation Gaps

1. Missing API Documentation

// Need to document:

/// Registers a pipe type for string resolution.
/// 
/// This allows pipes to be specified by string names in the through() method.
/// 
/// Example:
/// ```dart
/// pipeline.registerPipeType('auth', AuthMiddleware);
/// pipeline.through(['auth']);
/// ```
void registerPipeType(String name, Type type);

/// Sets the method to be called on pipe instances.
///
/// By default, the 'handle' method is called. This method allows
/// customizing which method is called on each pipe.
///
/// Example:
/// ```dart
/// pipeline.via('process').through([MyPipe]);
/// // Will call process() instead of handle()
/// ```
Pipeline via(String method);

2. Missing Integration Examples

// Need examples for:

// 1. Container Integration
var pipeline = Pipeline(container)
  ..through([
    AuthMiddleware,
    container.make<LoggingMiddleware>(),
    'validation' // Resolved from container
  ]);

// 2. Exception Handling
pipeline.through([
  (passable, next) async {
    try {
      return await next(passable);
    } catch (e) {
      logger.error('Pipeline error', e);
      throw PipelineException(e.toString());
    }
  }
]);

// 3. Method Customization
pipeline.via('process')
  .through([
    ProcessingPipe(), // Will call process() instead of handle()
    ValidationPipe()
  ]);

3. Missing Test Coverage

// Need tests for:

void main() {
  group('Type Registration', () {
    test('resolves string pipes to types', () {
      var pipeline = Pipeline(container);
      pipeline.registerPipeType('auth', AuthMiddleware);
      
      await pipeline
        .through(['auth'])
        .send(request)
        .then(handler);
        
      verify(() => container.make<AuthMiddleware>()).called(1);
    });
  });
  
  group('Method Invocation', () {
    test('calls custom methods on pipes', () {
      var pipeline = Pipeline(container);
      var pipe = MockPipe();
      
      await pipeline
        .via('process')
        .through([pipe])
        .send(data)
        .then(handler);
        
      verify(() => pipe.process(any, any)).called(1);
    });
  });
}

Implementation Priority

1. High Priority

   • Pipeline hub (Laravel compatibility)
   • Pipeline conditions (Laravel compatibility)
   • Better exception handling

2. Medium Priority

   • Pipeline caching
   • Better type resolution
   • Performance optimizations

3. Low Priority

   • Additional helper methods
   • Extended testing utilities
   • Debug/profiling tools

Next Steps

1. Implementation Tasks

   • Add pipeline hub
   • Add pipeline conditions
   • Add caching support
   • Improve exception handling

2. Documentation Tasks

   • Document type registration
   • Document method invocation
   • Document exception handling
   • Add integration examples

3. Testing Tasks

   • Add type registration tests
   • Add method invocation tests
   • Add exception handling tests
   • Add integration tests

Would you like me to:

1. Start implementing missing features?
2. Update documentation for existing features?
3. Create test cases for missing coverage?

Development Guidelines

1. Getting Started

Before implementing pipeline features:

1. Review Getting Started Guide
2. Check Laravel Compatibility Roadmap
3. Follow Testing Guide
4. Use Foundation Integration Guide
5. Review Pipeline Package Specification

2. Implementation Process

For each pipeline feature:

1. Write tests following Testing Guide
2. Implement following Laravel patterns
3. Document following Getting Started Guide
4. Integrate following Foundation Integration Guide

3. Quality Requirements

All implementations must:

1. Pass all tests (see Testing Guide)
2. Meet Laravel compatibility requirements
3. Follow integration patterns (see Foundation Integration Guide)
4. Match specifications in Pipeline Package Specification

4. Integration Considerations

When implementing pipeline features:

1. Follow patterns in Foundation Integration Guide
2. Ensure Laravel compatibility per Laravel Compatibility Roadmap
3. Use testing approaches from Testing Guide
4. Follow development setup in Getting Started Guide

5. Performance Guidelines

Pipeline system must:

1. Handle nested pipelines efficiently
2. Minimize memory usage in long pipelines
3. Support async operations
4. Scale with number of stages
5. Meet performance targets in Laravel Compatibility Roadmap

6. Testing Requirements

Pipeline tests must:

1. Cover all pipeline types
2. Test stage ordering
3. Verify error handling
4. Check conditional execution
5. Follow patterns in Testing Guide

7. Documentation Requirements

Pipeline documentation must:

1. Explain pipeline patterns
2. Show integration examples
3. Cover error handling
4. Include performance tips
5. Follow standards in Getting Started Guide