# Changelog

All notable changes to the QR Generator System 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).

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## [1.0.0] - 2024-01-21

### 🎉 Initial Release

**Enterprise-grade QR Code Generator System for internal company use.**

### Added

#### Core Features
- **Static QR Code Generation**
  - Support for URLs, text, email, phone, SMS, WiFi, vCard
  - Custom colors and sizes
  - Logo overlay support
  - Multiple export formats (PNG/SVG/PDF)
  - Error correction levels (L/M/Q/H)

- **Dynamic QR Code Generation**
  - Editable destination URLs
  - Short URL redirect system
  - Real-time scan tracking
  - Expiration date support
  - Device and browser detection

- **Multi-Link QR Codes**
  - Branded landing pages
  - Unlimited links per page
  - Custom themes (light/dark/custom)
  - Click tracking per link
  - Background customization
  - Icon support

#### User Management
- Role-based access control (Admin/Manager/Staff/Viewer)
- Secure authentication with bcrypt
- Session management
- CSRF protection
- User profile management
- Department organization
- Admin-only user creation

#### Campaign Management
- Campaign creation and organization
- QR code grouping
- Goal setting and tracking
- Budget monitoring
- Start/end date scheduling
- Status management (Draft/Active/Paused/Completed/Archived)

#### Analytics & Reporting
- Dashboard with key metrics
- Scan count tracking
- Device breakdown (mobile/tablet/desktop)
- Browser statistics
- Geographic data tracking
- Time-based analytics
- Campaign performance reports
- Multi-link click analytics

#### Security Features
- Session-based authentication
- Password hashing (bcrypt)
- CSRF token protection
- SQL injection prevention (PDO prepared statements)
- XSS protection (output escaping)
- IP restriction support
- Audit logging
- Secure file storage
- HTTPS enforcement

#### API
- RESTful API endpoints
- JSON responses
- CRUD operations for QR codes
- Analytics endpoints
- Session-based authentication
- Rate limiting support

#### Design & Customization
- Tailwind CSS styling
- Vue 3 integration
- Responsive design
- Custom branding support
- Template system
- Multi-theme support

### Technical Stack
- PHP 8.3+ (Full OOP)
- MySQL 8+
- PDO (Database layer)
- Composer (Dependency management)
- Vue 3 (Frontend framework)
- Tailwind CSS (Styling)
- endroid/qr-code (QR generation)
- PSR-4 autoloading

### Architecture
- MVC pattern
- Service layer
- Middleware system
- Query builder
- Custom router
- Template engine

### Documentation
- Complete README
- Installation guide
- Deployment guide
- API documentation
- Security policy
- Feature list
- Quick start guide

### Database
- 11 tables with proper relationships
- Indexes for performance
- Foreign key constraints
- UTF-8 support
- Audit trail tables

### Default Data
- Admin user (admin@company.internal / Admin@123)
- System settings
- Default configurations

---

## [Unreleased]

### Planned for v1.1.0 (Q2 2024)

#### Features
- [ ] Two-factor authentication (2FA)
- [ ] Password reset flow
- [ ] Email notifications
- [ ] Bulk QR code generation
- [ ] CSV import/export
- [ ] Advanced analytics dashboard
- [ ] QR code templates library
- [ ] Scheduled QR activation
- [ ] Auto-archive old campaigns

#### Improvements
- [ ] Enhanced search functionality
- [ ] Keyboard shortcuts
- [ ] Dark mode for admin panel
- [ ] Performance optimizations
- [ ] Better mobile responsiveness

#### Bug Fixes
- [ ] TBD based on user feedback

---

## [Planned] - Future Versions

### v1.2.0 (Q3 2024)
- Mobile app (iOS/Android)
- QR code scanner app
- Webhook support
- API key management
- Custom domains
- Geographic restrictions
- A/B testing framework

### v1.3.0 (Q4 2024)
- Heatmap analytics
- Machine learning insights
- Advanced reporting
- White-label solution
- Multi-language support
- Zapier integration
- Slack integration

### v2.0.0 (2025)
- Complete UI redesign
- Real-time collaboration
- Advanced permissions
- Custom workflows
- Enterprise SSO
- Advanced security features

---

## Version History

| Version | Release Date | Status | Notes |
|---------|--------------|--------|-------|
| 1.0.0   | 2024-01-21  | ✅ Released | Initial release |
| 1.1.0   | 2024-Q2     | 🔄 Planned | Enhanced features |
| 1.2.0   | 2024-Q3     | 📋 Planned | Mobile & integrations |
| 1.3.0   | 2024-Q4     | 📋 Planned | Advanced analytics |
| 2.0.0   | 2025-Q1     | 💡 Concept | Major redesign |

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## Migration Notes

### From v0.x to v1.0.0
- Initial release - no migration needed

### Future Migrations
- Migration guides will be provided for each major version

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## Support

For questions about this changelog or version history:
- Email: support@company.internal
- Documentation: README.md
- Issue Tracker: Internal ticketing system

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## Contributors

**Development Team:**
- Senior Software Architect
- Full-Stack PHP Developer
- UI/UX Designer
- QA Engineer
- DevOps Engineer

**Special Thanks:**
- IT Department
- Beta Testers
- Management Team

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**Legend:**
- ✅ Released
- 🔄 In Progress
- 📋 Planned
- 💡 Concept
- ❌ Cancelled
- 🐛 Bug Fix
- ⚡ Performance
- 🔒 Security
- 📝 Documentation

---

**Last Updated:** 2024-01-21  
**Current Version:** 1.0.0  
**Next Release:** Q2 2024
