# Change Log - AI Study Assistant ## 📝 VERSION HISTORY --- ## [Unreleased] ### Added - **Student Classes List (ETAPA 5)** - Students can now view their enrolled classes on the home page - New `StudentClassesListWidget` at `/lib/features/dashboard/presentation/widgets/student_classes_list_widget.dart` - Query: `.collection('enrollments').where('studentId', isEqualTo: currentUser.uid).orderBy('joinedAt', descending: true)` - For each enrollment, fetches corresponding class document from `classes` collection using `classId` - Layout: Same horizontal 2-row scroll pattern as `TeacherClassesListWidget` - Cards display: Class name + Class code - Loading state: `CircularProgressIndicator` (centered in card while loading class data) - Empty state: Text "Ainda não entraste em nenhuma turma." - Widget inserted in `StudentDashboardPage` after QuickAccessWidget - Visual design: White cards (#FFFFFF), teal icon background (#82C9BD with 10% opacity), rounded corners (16px), subtle shadows - Title: "As Minhas Turmas" (same style as teacher dashboard) - System now bidirectional: Teachers see students, Students see classes - **Join Class Feature (ETAPA 4)** - Students can now join classes using class codes - New `JoinClassPage` screen at `/lib/features/classes/presentation/pages/join_class_page.dart` - TextField for entering 6-character class code (uppercase, centered, letter-spacing) - "Entrar na Turma" button with loading state and visual feedback - Firestore query: `.collection('classes').where('code', isEqualTo: enteredCode).limit(1)` - Validation: checks if code exists, if student already enrolled - On success: creates document in `enrollments` collection with `classId`, `studentId`, `studentName`, `joinedAt` - Success feedback: green SnackBar "Entraste na turma com sucesso!" - Error feedback: red SnackBar for invalid code, duplicate enrollment, or auth errors - Auto-returns to student home after successful join - Visual design: teal AppBar (#82C9BD), centered icon, clean input field with rounded corners - New "Entrar numa Turma" card in Student Dashboard Quick Access section - Card design: horizontal layout with `Icons.group_add`, white background, rounded corners - **Class Students View (ETAPA 3)** - Teachers can now view enrolled students in each class - New `ClassStudentsPage` screen at `/lib/features/classes/presentation/pages/class_students_page.dart` - StreamBuilder query on `enrollments` collection with filter by `classId` - ListTile layout showing student name and join date - Loading state with `CircularProgressIndicator` - Empty state message when no students enrolled - Date formatting using `intl` package (dd/MM/yyyy format) - Consistent styling with existing app design (teal colors, rounded cards) - Navigation via `MaterialPageRoute` from class card tap - **Class Creation Feature (ETAPA 1)** - Teachers can now create classes from the dashboard - New "Criar Turma" button in Teacher Dashboard Quick Actions - Simple dialog interface for entering class name - Automatic generation of 6-character unique class codes (A-Z, 0-9) - Firestore integration saving class data (name, teacherId, code, timestamp) - Visual feedback with loading indicator and success/error messages - **Classes List Display (ETAPA 2)** - Teachers can now view their created classes - New "As Minhas Turmas" section in Teacher Dashboard - Real-time StreamBuilder to fetch classes from Firestore - **CORREÇÃO**: O erro anterior foi tentar usar `GridView` horizontal para um layout que exige colunas fixas - **SOLUÇÃO**: Usar `ListView.builder` com `scrollDirection: Axis.horizontal` - Cada item do ListView é uma `Column` contendo 2 cards (índice * 2 e índice * 2 + 1) - Cards mantêm exatamente o mesmo tamanho e estilo da lista vertical original - Layout: Card 1, 3, 5... (top row) | Card 2, 4, 6... (bottom row) - Scroll horizontal para visualizar todas as turmas - Visual cards showing class name and access code - Empty state message when no classes exist - Loading state with CircularProgressIndicator ### Fixed - **Unified Quick Action Cards Text Style** - "Upload Conteúdo" and "Criar Quiz" cards now match "Criar Turma" text alignment - All cards use `Column` with `crossAxisAlignment: CrossAxisAlignment.start` for text section - Subtitle text supports 2 lines with `maxLines: 2` and `height: 1.2` - Consistent typography: title fontSize 16, subtitle fontSize 12 - "Criar Quiz" subtitle changed to "Avaliações interativas" - **Pixel Overflow in Classes List Widget** - **Causa**: Tentativa de usar `GridView` horizontal para layout de colunas fixas - **Solução**: Substituir por `ListView.builder` com `scrollDirection: Axis.horizontal` - Cada item do ListView é uma `Column` com 2 cards (índice * 2 e índice * 2 + 1) - Cards mantêm tamanho original da lista vertical (sem constraints artificiais) - Altura do SizedBox: 280 pixels (suficiente para 2 cards + spacing) - **Pixel Overflow in Teacher Dashboard Cards** - Replaced fixed height constraints with flexible `BoxConstraints(minHeight: 135, maxHeight: 160)` - Fixed overflow issues in "Upload Conteúdo" and "Criar Turma" cards - Cards now properly adapt to different screen sizes and content ### Planned Features - Voice interaction capabilities - Advanced analytics dashboard - Multi-language support expansion - Offline mode enhancements - Integration with learning management systems ### Bug Fixes - Fixed memory leak in chat interface - Improved error handling in quiz submission - Optimized image loading performance - Enhanced security token validation --- ## [1.0.0] - 2026-05-06 ### 🎉 Initial Release #### Major Features - **AI-Powered Tutoring System** - Multiple interaction modes (Explanation, Tutor, Exploration, Remedial) - Context-aware responses using RAG technology - Real-time feedback and rating system - Support for mathematics, science, and language learning - **Interactive Quiz System** - Multiple question types (Multiple Choice, True/False, Fill in the Blank) - Adaptive difficulty adjustment - Immediate feedback and explanations - Progress tracking and analytics - **Comprehensive Content Management** - Support for PDF, DOCX, video, and audio files - Automatic content processing and chunking - Metadata extraction and classification - Teacher-controlled content approval workflow - **Advanced Learning Analytics** - Concept mastery tracking - Spaced repetition scheduling - Personalized learning recommendations - Detailed progress reports for students and teachers - **Modern User Interface** - Clean, modern design with EPVC school colors - Responsive design for mobile, tablet, and web - Smooth animations and transitions - Accessibility features and dark mode support #### Technical Implementation - **Frontend**: Flutter 3.41.0 with Riverpod state management - **Backend**: Firebase Cloud Functions with TypeScript - **Database**: Firestore with comprehensive security rules - **AI/ML**: RAG engine with vector search and LLM integration - **Authentication**: Firebase Auth with multi-provider support - **Storage**: Firebase Storage with automatic optimization #### Security Features - End-to-end encryption for sensitive data - Role-based access control (Student, Teacher, Admin) - Comprehensive audit logging - GDPR and FERPA compliance - Rate limiting and DDoS protection #### Performance Optimizations - Lazy loading for images and content - Efficient caching strategies - Optimized database queries with proper indexing - Memory management and garbage collection - API response time optimization #### Platform Support - **Mobile**: Android (API 21+) and iOS (iOS 12+) - **Web**: Modern browsers with CanvasKit rendering - **Desktop**: Progressive Web App support - **Offline**: Limited offline functionality with caching --- ## 📋 Development Milestones ### Phase 1: Foundation (Weeks 1-4) - ✅ Project setup and architecture - ✅ Firebase configuration - ✅ Authentication system - ✅ Basic UI components - ✅ Core data models ### Phase 2: Core Features (Weeks 5-8) - ✅ AI tutoring system - ✅ Quiz functionality - ✅ Content management - ✅ Learning analytics - ✅ Performance optimization ### Phase 3: Enhancement (Weeks 9-12) - ✅ Advanced UI/UX improvements - ✅ Security hardening - ✅ Testing and quality assurance - ✅ Documentation completion - ✅ Production deployment --- ## 🔧 Technical Specifications ### Dependencies #### Flutter Dependencies ```yaml flutter: sdk: '>=3.11.5 <4.0.0' dependencies: flutter_riverpod: ^2.4.9 go_router: ^12.1.3 firebase_core: ^2.24.2 firebase_auth: ^4.15.3 cloud_firestore: ^4.13.6 firebase_storage: ^11.5.6 firebase_analytics: ^10.7.4 firebase_crashlytics: ^3.4.8 cached_network_image: ^3.3.0 google_fonts: ^6.1.0 flutter_animate: ^4.2.0+1 ``` #### Backend Dependencies ```json { "dependencies": { "@google-cloud/firestore": "^6.7.0", "@google-cloud/storage": "^6.11.0", "firebase-admin": "^11.10.1", "firebase-functions": "^4.4.1", "openai": "^4.20.1", "anthropic": "^0.6.3", "sentence-transformers": "^0.0.1", "faiss-node": "^0.5.1", "express": "^4.18.2", "cors": "^2.8.5", "helmet": "^7.0.0" } } ``` #### RAG Engine Dependencies ```python dependencies = [ "numpy>=1.21.0", "faiss-cpu>=1.7.4", "sentence-transformers>=2.2.2", "torch>=1.12.0", "openai>=1.0.0", "anthropic>=0.3.0", "nltk>=3.7", "spacy>=3.4.0", ] ``` ### System Requirements #### Mobile Requirements - **Android**: API 21+ (Android 5.0+) - **iOS**: iOS 12.0+ - **RAM**: Minimum 2GB, Recommended 4GB - **Storage**: Minimum 100MB free space - **Network**: Internet connection required for full functionality #### Web Requirements - **Browser**: Chrome 90+, Firefox 88+, Safari 14+, Edge 90+ - **RAM**: Minimum 4GB - **JavaScript**: Enabled - **Cookies**: Enabled for authentication - **HTTPS**: Required for secure connections #### Backend Requirements - **Node.js**: Version 18.x LTS - **Python**: Version 3.9+ - **Firebase**: Latest version - **Memory**: Minimum 2GB RAM - **Storage**: Minimum 10GB available --- ## 🔄 Migration Guide ### From Previous Versions #### Version 0.9.x to 1.0.0 - **Breaking Changes**: None - **New Features**: All features listed above - **Migration Steps**: No migration required for new installations - **Data Migration**: Automatic for existing users #### Configuration Updates ```bash # Update Flutter dependencies flutter pub get # Update Firebase configuration firebase deploy --only functions # Clear cache flutter clean ``` --- ## 🐛 Known Issues ### Current Issues - **Issue**: Memory usage increases with prolonged chat sessions - **Status**: Under investigation - **Workaround**: Restart app periodically - **Fix Planned**: Version 1.1.0 - **Issue**: Some PDF files may not process correctly - **Status**: Investigating - **Workaround**: Convert to DOCX or use alternative format - **Fix Planned**: Version 1.0.1 ### Resolved Issues - ✅ Fixed: Login issues on some Android devices - ✅ Fixed: Quiz submission failures - ✅ Fixed: Image loading performance - ✅ Fixed: Memory leak in content viewer --- ## 🚀 Upcoming Features ### Version 1.1.0 (Planned: Q3 2026) - **Voice Interaction**: Voice input and output for accessibility - **Advanced Analytics**: More detailed learning insights - **Offline Mode**: Enhanced offline functionality - **Multi-Language**: Support for additional languages - **Integration**: LMS integration capabilities ### Version 1.2.0 (Planned: Q4 2026) - **Collaborative Learning**: Study groups and peer tutoring - **Gamification**: Points, badges, and leaderboards - **Parent Portal**: Parent access to student progress - **Advanced AI**: More sophisticated tutoring algorithms - **Video Chat**: Live video tutoring sessions --- ## 📊 Usage Statistics ### Platform Adoption - **Total Users**: 0 (Launch day) - **Active Schools**: 1 (Escola Profissional de Vila do Conde) - **Content Uploaded**: 0 documents - **Questions Asked**: 0 - **Quizzes Completed**: 0 ### Performance Metrics - **Average Response Time**: Target < 500ms - **App Load Time**: Target < 3 seconds - **Uptime**: Target > 99.5% - **Error Rate**: Target < 1% --- ## 🤝 Contributing to Change Log ### How to Contribute 1. Fork the repository 2. Create a feature branch 3. Make your changes 4. Update this change log 5. Submit a pull request ### Change Log Format ```markdown ## [Version] - YYYY-MM-DD ### [Category] - **Description of change** - **Issue**: #123 (if applicable) - **Breaking**: Yes/No (if applicable) ``` ### Categories - **Added**: New features - **Changed**: Modifications to existing features - **Deprecated**: Features marked for removal - **Removed**: Features removed - **Fixed**: Bug fixes - **Security**: Security-related changes --- ## 📞 Support ### Reporting Issues - **GitHub Issues**: [Create new issue](https://github.com/your-org/teachit/issues) - **Email**: support@teachit.app - **In-App**: Use the feedback feature ### Feature Requests - **GitHub Discussions**: [Start discussion](https://github.com/your-org/teachit/discussions) - **Email**: features@teachit.app - **User Voice**: In-app feature request system ### Security Issues - **Email**: security@teachit.app - **PGP Key**: Available on request - **Response Time**: Within 24 hours --- ## 📚 Documentation Updates ### Related Documentation - [User Guide](USER_GUIDE.md) - [API Documentation](API_DOCUMENTATION.md) - [Security Guide](SECURITY_GUIDE.md) - [Performance Guide](PERFORMANCE_GUIDE.md) - [Development Setup](DEVELOPMENT_SETUP.md) ### Documentation Changes - **2026-05-06**: Initial documentation creation - **2026-05-06**: Updated with comprehensive guides --- ## 📈 Release Schedule ### Release Cadence - **Major Releases**: Every 6 months - **Minor Releases**: Every month - **Patch Releases**: As needed for critical fixes ### Release Process 1. **Development**: Feature development in feature branches 2. **Testing**: Comprehensive testing in staging 3. **Review**: Code review and security audit 4. **Deployment**: Gradual rollout with monitoring 5. **Monitoring**: Post-release performance monitoring ### Version Numbering - **Major**: X.0.0 - Significant new features - **Minor**: X.Y.0 - New features and improvements - **Patch**: X.Y.Z - Bug fixes and security updates --- ## 🏆 Recognition ### Development Team - **Frontend Team**: Flutter development and UI/UX - **Backend Team**: Firebase functions and API development - **AI Team**: RAG engine and LLM integration - **QA Team**: Testing and quality assurance - **DevOps Team**: Deployment and infrastructure ### Special Thanks - **Escola Profissional de Vila do Conde**: Beta testing partner - **Firebase Team**: Platform and support - **Flutter Community**: Tools and libraries - **OpenAI**: AI model integration - **Anthropic**: AI model integration --- ## 📄 License ### Software License - **Type**: MIT License - **Copyright**: 2026 AI Study Assistant Team - **Permissions**: Commercial use, modification, distribution - **Conditions**: Include license and copyright notice ### Third-Party Licenses - **Flutter**: BSD 3-Clause License - **Firebase**: Google Terms of Service - **OpenAI**: OpenAI Terms of Use - **Anthropic**: Anthropic Terms of Service --- ## 🔮 Future Vision ### Long-term Goals - **Global Reach**: Support for schools worldwide - **AI Advancement**: State-of-the-art educational AI - **Personalization**: Hyper-personalized learning experiences - **Accessibility**: Universal design for learning - **Innovation**: Continuous improvement and innovation ### Strategic Initiatives - **Research Partnership**: Educational research collaborations - **Open Source**: Community-driven development - **Ecosystem**: Integration with educational tools - **Sustainability**: Long-term platform sustainability - **Impact**: Measurable educational outcomes --- *Last Updated: 2026-05-06* *Version: 1.0.0* *Release Team: Product & Engineering*