editia-core/CHANGELOG.md

Core services and utilities for Editia applications - Authentication, Monetization, Video Generation Types, and Database Management

# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased]

### Added
- Initial package structure and configuration
- TypeScript configuration with strict mode
- Jest testing setup with coverage
- ESLint and Prettier configuration
- Comprehensive documentation

### Changed
- N/A

### Deprecated
- N/A

### Removed
- N/A

### Fixed
- N/A

### Security
- N/A

## [1.0.0] - 2025-01-XX

### Added
- **Authentication Service**: Unified Clerk + Supabase authentication
  - `ClerkAuthService` class with comprehensive user verification
  - JWT token validation and user lookup
  - Database user synchronization
  - Pro subscription access checking
  - User deletion functionality

- **Express Middleware**: Ready-to-use authentication middleware
  - `authenticateUser` - Basic authentication for protected routes
  - `requireProAccess` - Pro subscription required middleware
  - `optionalAuth` - Optional authentication middleware
  - `createAuthMiddleware` - Factory function for custom middleware

- **Logging System**: Unified logging across the package
  - `Logger` class with configurable log levels
  - Structured logging with timestamps and context
  - Child logger support for nested contexts
  - Global logger instance

- **Type Definitions**: Comprehensive TypeScript types
  - Authentication types (`DatabaseUser`, `AuthResult`, `AuthErrorResponse`)
  - Configuration types (`AuthConfig`)
  - Database types (placeholder for Supabase integration)
  - Feature flags types (placeholder for Phase 2)
  - Usage tracking types (placeholder for Phase 2)
  - Subscription types (placeholder for Phase 2)

- **Utility Functions**: Convenience functions for common operations
  - `getUserId()` - Extract database user ID from auth header
  - `verifyUser()` - Verify user authentication
  - `hasProAccess()` - Check Pro subscription access
  - `initializeEditiaCore()` - Package initialization

- **Testing Infrastructure**: Comprehensive test setup
  - Unit tests for authentication service
  - Test utilities and mocks
  - Jest configuration with coverage
  - Test setup and teardown

- **Documentation**: Complete documentation suite
  - README with installation and usage examples
  - API reference with TypeScript interfaces
  - Migration guide for existing applications
  - Database schema documentation
  - Configuration examples

### Technical Details

#### Authentication Service Features
- **JWT Validation**: Comprehensive JWT format and content validation
- **Error Handling**: Standardized error responses with status codes and hints
- **User Synchronization**: Automatic Clerk to Supabase user mapping
- **Pro Access Control**: Subscription-based access control (placeholder for RevenueCat)
- **Logging**: Detailed logging for debugging and monitoring

#### Middleware Features
- **Express Integration**: Seamless integration with Express.js applications
- **Type Safety**: Full TypeScript support with extended Request types
- **Flexible Options**: Multiple middleware types for different use cases
- **Error Handling**: Proper error responses with appropriate HTTP status codes

#### Development Experience
- **TypeScript**: Full TypeScript support with strict mode
- **Testing**: Jest-based testing with coverage requirements
- **Linting**: ESLint configuration with TypeScript rules
- **Formatting**: Prettier configuration for consistent code style
- **Documentation**: JSDoc comments throughout the codebase

### Breaking Changes
- None (initial release)

### Migration Guide
- N/A (initial release)

### Dependencies
- `@clerk/backend`: ^1.0.0 (Clerk authentication)
- `@supabase/supabase-js`: ^2.38.0 (Supabase client)
- `express`: ^4.18.0 (peer dependency for middleware)

### Development Dependencies
- `typescript`: ^5.0.0
- `jest`: ^29.0.0
- `eslint`: ^8.0.0
- `prettier`: ^3.0.0
- `typedoc`: ^0.25.0

---

## Version History

### Version 1.0.0 (Current)
- **Status**: Initial Release
- **Focus**: Authentication and basic infrastructure
- **Target**: Production-ready authentication service

### Planned Versions

#### Version 1.1.0 (Next)
- **Focus**: Feature flags and usage tracking
- **Features**: 
  - Feature flags service
  - Usage tracking service
  - Database type generation

#### Version 1.2.0
- **Focus**: Subscription management
- **Features**:
  - RevenueCat integration
  - Subscription plan management
  - Billing integration

#### Version 2.0.0 (Future)
- **Focus**: Advanced features and performance
- **Features**:
  - Advanced analytics
  - Performance monitoring
  - Plugin system
  - API versioning

---

## Contributing

When contributing to this project, please follow the changelog format:

### Added
- New features

### Changed
- Changes in existing functionality

### Deprecated
- Soon-to-be removed features

### Removed
- Removed features

### Fixed
- Bug fixes

### Security
- Security-related changes

## Links

- [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
- [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
- [GitHub Repository](https://github.com/editia/core)