monolog-gdpr-filter/TODO.md

TODO.md - Monolog GDPR Filter

This file tracks remaining issues, improvements, and feature requests for the monolog-gdpr-filter library.

Current Status - PRODUCTION READY

Project Statistics (verified 2025-12-01):

• 141 PHP files (60 source files, 81 test files)
• 1,346 tests with 100% success rate (3,386 assertions)
• 85.07% line coverage, 88.31% method coverage
• PHP 8.4+ with modern language features and strict type safety
• Zero Critical Issues: All functionality-blocking bugs resolved
• Static Analysis: All tools pass cleanly (Psalm, PHPStan, Rector, PHPCS)

Static Analysis Status

All static analysis tools now pass:

• Psalm Level 5: 0 errors
• PHPStan Level 6: 0 errors
• Rector: No changes needed
• PHPCS: 0 errors, 0 warnings

Completed Items (2025-12-01)

Developer Experience

• Added recovery mechanism for failed masking operations
  • src/Recovery/FailureMode.php - Enum for failure modes (FAIL_OPEN, FAIL_CLOSED, FAIL_SAFE)
  • src/Recovery/RecoveryStrategy.php - Interface for recovery strategies
  • src/Recovery/RecoveryResult.php - Value object for recovery outcomes
  • src/Recovery/RetryStrategy.php - Retry with exponential backoff
  • src/Recovery/FallbackMaskStrategy.php - Type-aware fallback values
• Improved error context in audit logging with detailed context
  • src/Audit/ErrorContext.php - Standardized error information with sensitive data sanitization
  • src/Audit/AuditContext.php - Structured context for audit entries with operation types
  • src/Audit/StructuredAuditLogger.php - Enhanced audit logger wrapper
• Created interactive demo/playground for pattern testing
  • demo/PatternTester.php - Pattern testing utility
  • demo/index.php - Web API endpoint
  • demo/templates/playground.html - Interactive web interface

Code Quality

• Fixed all PHPCS Warnings (81 warnings → 0):
  • Added missing PHPDoc documentation blocks
  • Fixed line length and spacing formatting issues
  • Full PSR-12 compliance achieved

Framework Integration

• Created Symfony integration guide - docs/symfony-integration.md
• Added PSR-3 logger decorator pattern example - docs/psr3-decorator.md
• Created Docker development environment - docker/Dockerfile, docker/docker-compose.yml
• Added examples for other popular frameworks - docs/framework-examples.md
  • CakePHP, CodeIgniter 4, Laminas, Yii2, PSR-15 middleware

Architecture

• Extended Strategy Pattern support:
  • src/Strategies/CallbackMaskingStrategy.php - Wraps custom callbacks as strategies
  • Factory methods: constant(), hash(), partial() for common use cases

Advanced Features (Completed 2025-12-01)

• Support masking arrays/objects in message strings
  • src/SerializedDataProcessor.php - Handles print_r, var_export, serialize output formats
• Add data anonymization with k-anonymity
  • src/Anonymization/KAnonymizer.php - K-anonymity implementation for GDPR compliance
  • src/Anonymization/GeneralizationStrategy.php - Age, date, location, numeric range strategies
• Add retention policy support
  • src/Retention/RetentionPolicy.php - Configurable retention periods with actions (delete, anonymize, archive)
• Add data portability features (export masked logs)
  • src/Streaming/StreamingProcessor.php::processToFile() - Export processed logs to files
• Implement streaming processing for very large logs
  • src/Streaming/StreamingProcessor.php - Memory-efficient chunked processing with generators

Architecture Improvements (Completed 2025-12-01)

• Refactor to follow Single Responsibility Principle more strictly
  • src/MaskingOrchestrator.php - Extracted masking coordination from GdprProcessor
• Reduce coupling with Adbar\Dot library (create abstraction)
  • src/Contracts/ArrayAccessorInterface.php - Abstraction interface
  • src/ArrayAccessor/DotArrayAccessor.php - Implementation using adbario/php-dot-notation
  • src/ArrayAccessor/ArrayAccessorFactory.php - Factory for creating accessors
• Add dependency injection container support
  • src/Builder/GdprProcessorBuilder.php - Fluent builder for configuration
• Replace remaining static methods for better testability
  • src/Factory/AuditLoggerFactory.php - Instance-based factory for audit loggers
  • src/PatternValidator.php - Instance methods added (static methods deprecated)
• Implement plugin architecture for custom processors
  • src/Contracts/MaskingPluginInterface.php - Contract for masking plugins
  • src/Plugins/AbstractMaskingPlugin.php - Base class with no-op defaults
  • src/Builder/PluginAwareProcessor.php - Wrapper with pre/post processing hooks

Documentation (Completed 2025-12-01)

• Create performance tuning guide
  • docs/performance-tuning.md - Benchmarking, pattern optimization, memory management, caching, streaming
• Add troubleshooting guide with common issues
  • docs/troubleshooting.md - Installation, pattern matching, performance, memory, integration issues
• Add integration examples with popular logging solutions
  • docs/logging-integrations.md - ELK, Graylog, Datadog, New Relic, Sentry, Papertrail, Loggly, AWS CloudWatch, Google Cloud, Fluentd
• Create plugin development guide
  • docs/plugin-development.md - Comprehensive guide for creating custom masking plugins (interface, hooks, priority, use cases)

Development Notes

• All critical, high, medium, and low priority functionality is complete
• Project is production-ready with comprehensive test coverage (85.07% line coverage)
• Static analysis tools all pass - maintain this standard
• Use composer lint:fix for automated code quality improvements
• Follow linting policy: fix issues, don't suppress unless absolutely necessary
• Run demo: php -S localhost:8080 demo/index.php

---

Last Updated: 2025-12-01 Production Status: Ready All Items: Complete