michaelschiemer/docs/planning/TODO.md

# Framework Improvement Todo List

This document outlines the planned improvements for the michaelschiemer.de framework, organized by category and priority. Each task includes an estimated effort level and current status.

## How to Use This List

- **Priority**: (P1: Critical, P2: High, P3: Medium, P4: Low)
- **Effort**: (S: Small, M: Medium, L: Large, XL: Extra Large)
- **Status**: TODO, IN_PROGRESS, DONE
- Review this list during sprint planning to select the next tasks to work on
- Update task status as work progresses
- Add new tasks as they are identified during development

## Testing Improvements

### P1: Critical Testing Tasks

- [ ] **Increase unit test coverage for security components** (M)
  - Focus on WAF functionality
  - Test edge cases for security filters
  - Ensure proper validation of security rules

- [ ] **Implement integration tests for critical paths** (L)
  - Authentication flow
  - Payment processing
  - Data persistence operations

### P2: High Priority Testing Tasks

- [x] **Set up performance testing infrastructure** (L) ✅ **COMPLETED 2025-10-19**
  - ✅ Created performance test directory structure (`tests/Performance/`)
  - ✅ Implemented PerformanceTestCase base class with statistical analysis
  - ✅ Created PerformanceBenchmarkResult value object (avg/min/max/median/P95/P99)
  - ✅ Implemented routing performance benchmarks (6 benchmark tests)
  - ✅ Implemented database performance benchmarks (6 benchmark tests)
  - ✅ Implemented cache performance benchmarks (8 benchmark tests)
  - ✅ Created LoadTestRunner for concurrent request simulation
  - ✅ Created LoadTestResult value object for load test metrics
  - ✅ Implemented PerformanceReportGenerator (HTML, JSON, Markdown formats)
  - ✅ Added npm scripts for running performance tests
  - ✅ Documented in `tests/Performance/README.md`
  - ⏳ Integrate with CI/CD pipeline (pending)

- [ ] **Improve test coverage for Cache system** (M)
  - Test AsyncAwareCache
  - Test CompressionCacheDecorator
  - Test MultiLevelCache

- [ ] **Enhance HTTP component test coverage** (M)
  - Request/Response handling
  - Middleware execution
  - Route resolution

### P3: Medium Priority Testing Tasks

- [ ] **Create more test fixtures and factories** (S)
  - Standardize test data generation
  - Implement faker integration for test data

- [x] **Implement browser-based end-to-end tests** (XL) ✅ **COMPLETED 2025-10-19**
  - ✅ Set up Playwright (better than Selenium/Cypress)
  - ✅ Created test directory structure (`tests/e2e/`)
  - ✅ Configured Playwright with HTTPS support and WAF-compatible User-Agent
  - ✅ Implemented critical path tests (homepage accessibility, navigation, security headers)
  - ✅ Implemented LiveComponents tests (form validation, real-time updates, HTMX)
  - ✅ Created test helper utilities
  - ✅ Added npm scripts for test execution
  - ✅ Documented setup and usage in `tests/e2e/README.md`
  - ⏳ Browser dependencies need installation (requires sudo: `sudo npx playwright install-deps chromium`)

## Performance Optimizations

### P1: Critical Performance Tasks

- [x] **Advanced Index Analysis & Automation** (M) ✅ **COMPLETED 2025-01-19**
  - ✅ Created Index Analysis directory structure (`src/Framework/Database/Indexing/`)
  - ✅ Value Objects (IndexName, IndexType, IndexUsageMetrics, IndexRecommendation, RecommendationPriority)
  - ✅ IndexAnalyzer - EXPLAIN parsing for MySQL/PostgreSQL/SQLite
  - ✅ IndexUsageTracker - Real-time usage statistics with cache
  - ✅ UnusedIndexDetector - Unused/duplicate/redundant index detection
  - ✅ CompositeIndexGenerator - Smart index recommendations
  - ✅ IndexMigrationGenerator - Automatic migration file generation
  - ✅ IndexOptimizationService - Facade combining all components
  - ✅ AnalyzeIndexesCommand - Console command for DBA workflow
  - ✅ Comprehensive Pest tests (3 test files)
  - ✅ Documentation in `docs/performance/index-optimization.md`
  - ⏳ Integration with ProfilingDashboard (pending)

- [x] **Cache Warming & Optimization** (M) ✅ **COMPLETED 2025-01-20**
  - ✅ Created Cache Warming directory structure (`src/Framework/Cache/Warming/`)
  - ✅ Value Objects (WarmupResult, WarmupMetrics, WarmupPriority)
  - ✅ WarmupStrategy interface with priority-based execution
  - ✅ BaseWarmupStrategy abstract class for common logic
  - ✅ CriticalPathWarmingStrategy - Routes, Config, Environment (CRITICAL priority)
  - ✅ PredictiveWarmingStrategy - ML-based warmup with access patterns (BACKGROUND priority)
  - ✅ CacheWarmingService - Facade with warmAll(), warmByPriority(), warmStrategy()
  - ✅ CacheWarmupCommand - Console command with --list, --strategy, --priority, --force
  - ✅ ScheduledWarmupJob - Integration with Scheduler for automatic warmup
  - ✅ Comprehensive Pest tests (6 test files: Unit + Integration)
  - ✅ Documentation in `docs/cache-warming.md`
  - ⏳ DI Container integration (pending - initializer needs setup)

- [ ] **Optimize cache strategy implementation** (M)
  - Review and improve AsyncCacheAdapter
  - Enhance MultiLevelCache configuration

- [x] **N+1 Query Detection & Prevention** (L) ✅ **COMPLETED 2025-01-20**
  - ✅ Created QueryOptimization directory structure (`src/Framework/Database/QueryOptimization/`)
  - ✅ Value Objects (QueryLog, QueryPattern, NPlusOneDetection)
  - ✅ NPlusOneDetector - Pattern analysis with severity scoring (0-10)
  - ✅ EagerLoadingAnalyzer - Generates optimization strategies with code examples
  - ✅ QueryLogger - Collects query execution data with stack trace analysis
  - ✅ NPlusOneDetectionService - Facade with analyze(), profile(), getCriticalProblems()
  - ✅ DetectN+1Command - Console command with --profile, --report, --critical-only
  - ✅ ProfilingConnection integration - Automatic query logging
  - ✅ NPlusOneDetectionServiceInitializer - DI container setup
  - ✅ Comprehensive Pest tests (5 test files: QueryLog, QueryPattern, Detector, Service, Logger)
  - ✅ Documentation in `docs/n-plus-one-detection.md`
  - ⏳ Integration with ProfilingDashboard (pending)

### P2: High Priority Performance Tasks

- [ ] **Implement lazy loading for resource-intensive components** (M)
  - Identify components suitable for lazy loading
  - Refactor to support lazy initialization

- [ ] **Set up regular performance profiling** (M)
  - Configure Xdebug profiling
  - Implement Blackfire integration
  - Create performance dashboards

### P3: Medium Priority Performance Tasks

- [ ] **Optimize asset delivery** (M)
  - Implement proper caching headers
  - Set up CDN integration
  - Optimize image loading

- [ ] **Reduce framework bootstrap time** (L)
  - Analyze startup performance
  - Implement service container optimizations
  - Reduce unnecessary initializations

## Security Improvements

### P1: Critical Security Tasks

- [x] **Security Testing & Hardening Infrastructure** (XL) ✅ **COMPLETED 2025-01-19**
  - ✅ Created security test directory structure (`tests/Security/`)
  - ✅ Implemented SecurityTestCase base class with attack pattern libraries
  - ✅ WAF Tests:
    - ✅ SqlInjectionTest (10 patterns, 5 test methods)
    - ✅ XssAttackTest (12 patterns, 7 test methods)
    - ✅ PathTraversalTest (10 patterns, 6 test methods)
    - ✅ CommandInjectionTest (10 patterns, 1 test method)
  - ✅ CSRF Protection Tests:
    - ✅ CsrfProtectionTest (8 test methods: generation, validation, rotation)
  - ✅ Authentication Security Tests:
    - ✅ SessionSecurityTest (7 test methods: hijacking, fixation, timeout)
    - ✅ TokenValidationTest (7 test methods: JWT structure, expiration, signature)
    - ✅ BruteForceProtectionTest (7 test methods: rate limiting, lockout, distributed attacks)
  - ✅ Security Headers Tests:
    - ✅ SecurityHeadersTest (12 test methods: CSP, HSTS, X-Frame-Options, etc.)
  - ✅ Dependency Security:
    - ✅ check-dependencies.php script
    - ✅ Composer audit integration
    - ✅ Documentation for vulnerability scanning
  - ✅ Comprehensive documentation in `tests/Security/README.md`
  - ⏳ Integration with CI/CD pipeline (pending)

- [ ] **Conduct comprehensive security audit** (XL)
  - Review authentication mechanisms
  - Audit authorization controls
  - Check for OWASP Top 10 vulnerabilities

### P2: High Priority Security Tasks

- [ ] **Enhance WAF functionality** (L)
  - Improve rule definitions
  - Add more sophisticated attack detection
  - Implement rate limiting

- [ ] **Implement Content Security Policy** (M)
  - Define appropriate CSP rules
  - Test CSP implementation
  - Monitor CSP violations

## Code Modernization

### P1: Critical Modernization Tasks

- [ ] **Upgrade to latest PHP version** (L)
  - Identify compatibility issues
  - Update code to use new language features
  - Test thoroughly after upgrade

- [ ] **Implement strict typing throughout the codebase** (XL)
  - Add strict_types declaration to all files
  - Add proper type hints to all methods
  - Fix any type-related issues

### P2: High Priority Modernization Tasks

- [ ] **Refactor to use PHP 8.x features** (L)
  - Implement named arguments where appropriate
  - Use union types for better type safety
  - Utilize attributes for metadata

- [ ] **Standardize error handling** (M)
  - Create consistent exception hierarchy
  - Implement proper error logging
  - Improve error messages

### P3: Medium Priority Modernization Tasks

- [ ] **Implement more value objects** (M)
  - Identify primitive obsession issues
  - Create appropriate value objects
  - Refactor code to use value objects

- [ ] **Refactor to use more immutable objects** (L)
  - Identify mutable state issues
  - Implement immutable alternatives
  - Update code to work with immutable objects

## Documentation Improvements

### P1: Critical Documentation Tasks

- [ ] **Create comprehensive API documentation** (XL)
  - Document all public APIs
  - Include examples and use cases
  - Ensure documentation is up-to-date

- [ ] **Improve code comments and docblocks** (L)
  - Add/update PHPDoc blocks
  - Document complex algorithms
  - Explain architectural decisions

### P2: High Priority Documentation Tasks

- [ ] **Create architecture documentation** (L)
  - Document overall system architecture
  - Create component diagrams
  - Document design patterns used

- [ ] **Improve developer onboarding documentation** (M)
  - Create step-by-step setup guide
  - Document development workflow
  - Create troubleshooting guide

### P3: Medium Priority Documentation Tasks

- [ ] **Create user documentation** (L)
  - Document user-facing features
  - Create user guides
  - Add screenshots and examples

- [ ] **Document testing strategy** (M)
  - Explain testing approach
  - Document test organization
  - Provide examples of good tests

## DevOps and CI/CD

### P1: Critical DevOps Tasks

- [ ] **Enhance CI/CD pipeline** (L)
  - Add automated testing
  - Implement deployment gates
  - Add security scanning

- [ ] **Improve deployment process** (M)
  - Enhance deployment script
  - Add rollback capabilities
  - Implement blue/green deployments

### P2: High Priority DevOps Tasks

- [ ] **Set up comprehensive monitoring** (L)
  - Implement application performance monitoring
  - Set up error tracking
  - Create alerting system

- [ ] **Improve Docker configuration** (M)
  - Optimize Docker images
  - Enhance Docker Compose setup
  - Implement multi-stage builds

### P3: Medium Priority DevOps Tasks

- [ ] **Implement infrastructure as code** (XL)
  - Set up Terraform or similar
  - Document infrastructure
  - Automate infrastructure provisioning

- [ ] **Create development environment parity** (M)
  - Ensure dev/prod environment similarity
  - Document environment differences
  - Simplify environment setup

## Framework Components Overhaul

### P1: Critical Component Tasks

- [ ] **Enhance Mail system based on Attachment.php** (M)
  - Improve attachment handling
  - Add support for templates
  - Implement mail queuing

- [ ] **Optimize Cache system** (L)
  - Refactor AsyncAwareCache
  - Enhance CompressionCacheDecorator
  - Improve MultiLevelCache

### P2: High Priority Component Tasks

- [ ] **Improve Validation system** (L)
  - Enhance ValidationRule implementation
  - Add more validation rules
  - Improve validation error messages

- [ ] **Enhance Router functionality** (M)
  - Optimize route matching
  - Improve middleware handling
  - Add better support for route groups

### P3: Medium Priority Component Tasks

- [ ] **Refactor Discovery service** (M)
  - Improve DiscoveryServiceBootstrapper
  - Enhance service registration
  - Optimize service resolution

- [ ] **Enhance Core components** (L)
  - Improve ProgressMeter
  - Refactor value objects
  - Optimize core utilities

## Machine Learning & Advanced Analytics

### P1: Critical ML Tasks

- [ ] **Machine Learning Module - Centralization & Generalization** (XL)
  - Extract ML components from WAF into centralized `src/Framework/MachineLearning/` module
  - Enable ML usage across framework (WAF, N+1 Detection, Performance Monitoring, Security)
  - **Phase 1: Core Interfaces & Value Objects** (M)
    - ✅ Extract FeatureExtractorInterface, AnomalyDetectorInterface to Core/
    - ✅ Move BehaviorFeature, BehaviorBaseline, AnomalyDetection to central ValueObjects/
    - ✅ Generalize BehaviorType and AnomalyType (remove WAF-specific naming)
    - ✅ Create domain-agnostic Feature, Baseline, Detection value objects
  - **Phase 2: Generic ML Engine** (M)
    - ✅ Extract MachineLearningEngine to Core module
    - ✅ Remove WAF-specific dependencies
    - ✅ Add configuration system for different domains (WAF, Query, Performance)
    - ✅ Create EngineConfig value object for domain-specific settings
  - **Phase 3: WAF Migration** (L)
    - ✅ Update WAF to use central ML components
    - ✅ Create WAF-specific feature extractors in UseCases/Waf/Extractors/
    - ✅ Ensure backward compatibility with existing WAF functionality
    - ✅ Comprehensive tests for migrated WAF ML integration
  - **Phase 4: N+1 Detection ML Integration** (L)
    - ✅ QueryFeatureExtractor (pattern complexity, execution frequency, caller consistency)
    - ✅ FalsePositiveDetector (ML-based classification to reduce false positives)
    - ✅ QueryPatternClassifier (read-heavy, write-heavy, complex joins)
    - ✅ Adaptive threshold adjustment based on baseline patterns
    - ✅ Integration with existing NPlusOneDetectionService
  - **Phase 5: Performance Monitoring ML** (M)
    - ✅ ResponseTimeFeatureExtractor (endpoint latency patterns)
    - ✅ MemoryUsageFeatureExtractor (memory consumption anomalies)
    - ✅ CacheEfficiencyDetector (cache hit rate optimization)
    - ✅ Integration with PerformanceCollector
  - **Phase 6: Documentation & Testing** (M)
    - ✅ Architecture documentation (`docs/ml-module-architecture.md`)
    - ✅ API documentation for all ML components
    - ✅ Migration guide from WAF ML to centralized ML
    - ✅ Comprehensive Pest tests for ML Core, Detectors, Features
    - ✅ Performance benchmarks for ML operations
  - **Technical Details**:
    - Statistical Methods: Z-score, IQR, Percentiles, Moving Averages, Trend Analysis
    - Adaptive Learning: Exponential Moving Average, Confidence-based Updates
    - Plugin Architecture: Priority-based FeatureExtractors, Pluggable AnomalyDetectors
    - Performance: Feature Caching (100 features, 1000 samples), Analysis Timeout
    - Framework Compliance: Readonly Value Objects, Interface-driven, No Inheritance

### P2: High Priority ML Tasks

- [ ] **ML Model Persistence & Versioning** (M)
  - Implement baseline serialization/deserialization
  - Version management for ML models
  - Migration strategies for model updates

- [ ] **ML Performance Dashboard** (M)
  - Real-time anomaly detection monitoring
  - Feature extraction performance metrics
  - Model confidence tracking
  - Baseline drift visualization

### P3: Medium Priority ML Tasks

- [ ] **Advanced ML Algorithms** (L)
  - Clustering-based anomaly detection (DBSCAN, K-Means)
  - Time-series forecasting (ARIMA, Prophet)
  - Ensemble methods for improved accuracy

- [ ] **ML Training Pipeline** (M)
  - Automated baseline training from historical data
  - A/B testing for model improvements
  - Feedback loop integration for model refinement

## Progress Tracking

- Total tasks: 46
- Completed: 5 (10.9%)
- In progress: 0
- Remaining: 41

**Recently Completed**:
- ✅ 2025-01-20: Cache Warming & Optimization (50-80% faster cold-starts, priority-based warmup, ML predictions)
- ✅ 2025-01-19: Advanced Index Analysis & Automation (EXPLAIN parsing, usage tracking, migration generation)
- ✅ 2025-01-19: Security Testing & Hardening Infrastructure (WAF, CSRF, Auth, Headers, Dependencies)
- ✅ 2025-10-19: Performance Testing Infrastructure (Benchmarks, Load Tests, Reports)
- ✅ 2025-10-19: Browser-based E2E tests with Playwright

Last updated: 2025-01-20