HumanLenk MVP - Premium PWA with GPT-Powered Chat

A production-ready Progressive Web App (PWA) with AI-powered chat functionality, intelligent file processing, and comprehensive admin management.

🚀 Features

Core Features

• AI-Powered Chat: GPT integration for summarizing, editing, and clarifying content
• File Processing: Upload and analyze PDF, DOCX, and TXT files
• Progressive Web App: Installable on mobile and desktop with offline support
• Real-time Messaging: Streaming chat responses with message history
• User Authentication: Secure JWT-based authentication with role management

Admin Features

• User Management: View, manage, and analyze user accounts
• File Management: Monitor file uploads, processing status, and storage
• Analytics Dashboard: Comprehensive statistics and insights
• Survey Collection: Gather user feedback and ratings
• Role-based Access: Admin-only features with proper security

Technical Features

• Performance Optimized: Sub-2-second load times with caching
• Mobile-First Design: Responsive design with premium UI/UX
• Security: Comprehensive security headers and input validation
• Scalable Architecture: AWS-ready with auto-scaling capabilities
• CI/CD Pipeline: Automated testing, building, and deployment

🏗️ Architecture

Monorepo Structure

humanlenk/
├── apps/
│   ├── frontend/          # Next.js 14 PWA
│   └── backend/           # Express.js API
├── packages/
│   ├── types/             # Shared TypeScript types
│   ├── api-client/        # React Query hooks
│   ├── utils/             # Shared utilities
│   └── ui/                # Reusable UI components
├── .github/workflows/     # CI/CD pipelines
└── docs/                  # Documentation

Tech Stack

• Frontend: Next.js 14, React 18, TypeScript, Tailwind CSS, shadcn/ui
• Backend: Node.js, Express, TypeScript, Prisma, PostgreSQL
• AI Integration: OpenAI GPT API
• File Storage: AWS S3
• Authentication: JWT with bcrypt
• Database: PostgreSQL with Prisma ORM
• Deployment: AWS (S3, CloudFront, Elastic Beanstalk)
• CI/CD: GitHub Actions
• Monitoring: Winston logging, Lighthouse CI

🛠️ Development Setup

Prerequisites

• Node.js 18+
• Yarn 1.22+
• PostgreSQL 15+
• AWS Account (for file storage)
• OpenAI API Key

Installation

1. Clone the repository

   git clone https://github.com/ronniexy/HumanLenk.git
   cd HumanLenk

2. Install dependencies

   yarn install

3. Set up environment variables

   # Copy environment templates
   cp apps/backend/env.example apps/backend/.env
   cp env.example .env
   
   # Edit the files with your configuration

4. Set up the database

   # Generate Prisma client
   yarn db:generate
   
   # Run database migrations
   yarn db:migrate
   
   # (Optional) Open Prisma Studio
   yarn db:studio

5. Start development servers

   # Start both frontend and backend
   yarn dev
   
   # Or start individually
   yarn start:frontend  # http://localhost:4000
   yarn start:backend   # http://localhost:5000

Environment Variables

Backend (.env)

# Database
DATABASE_URL="postgresql://username:password@localhost:5432/humanlenk"

# Authentication
JWT_SECRET="your-super-secret-jwt-key-here"
JWT_EXPIRES_IN="7d"

# AWS Configuration
AWS_S3_BUCKET="humanlenk-files"
AWS_REGION="us-east-1"
AWS_ACCESS_KEY_ID="your-aws-access-key"
AWS_SECRET_ACCESS_KEY="your-aws-secret-key"

# OpenAI Configuration
OPENAI_API_KEY="your-openai-api-key"

# Server Configuration
PORT=5000
NODE_ENV="development"
LOG_LEVEL="info"

Frontend (.env.local)

NEXT_PUBLIC_API_URL="http://localhost:5000"

📱 Usage

For Users

1. Sign Up/Login: Create an account or sign in
2. Chat: Start conversations with the AI assistant
3. Upload Files: Drag and drop PDF, DOCX, or TXT files
4. Get AI Help: Ask questions about uploaded files
5. Provide Feedback: Rate your experience and leave feedback

For Admins

1. Access Admin Panel: Click "Admin" button in header (admin users only)
2. Monitor Users: View user statistics and manage accounts
3. Track Files: Monitor file uploads and processing status
4. Analyze Feedback: Review user surveys and ratings
5. View Analytics: Access comprehensive dashboard metrics

🚀 Deployment

AWS Deployment

Frontend (S3 + CloudFront)

# Build the frontend
cd apps/frontend
yarn build

# Deploy to S3
aws s3 sync out/ s3://your-bucket-name --delete

# Invalidate CloudFront
aws cloudfront create-invalidation --distribution-id YOUR_DISTRIBUTION_ID --paths "/*"

Backend (Elastic Beanstalk)

# Build the backend
cd apps/backend
yarn build

# Create deployment package
zip -r ../backend-deployment.zip . -x "node_modules/*" "src/*" "*.ts"

# Deploy to Elastic Beanstalk
eb deploy

Docker Deployment

# Build and run with Docker Compose
docker-compose up -d

# Or build individual services
docker build -f apps/frontend/Dockerfile -t humanlenk-frontend .
docker build -f apps/backend/Dockerfile -t humanlenk-backend .

🧪 Testing

Run Tests

# Run all tests
yarn test

# Run frontend tests
cd apps/frontend && yarn test

# Run backend tests
cd apps/backend && yarn test

Performance Testing

# Run Lighthouse CI
yarn analyze

# Bundle analysis
cd apps/frontend && yarn analyze

📊 Monitoring & Analytics

Performance Monitoring

• Lighthouse CI: Automated performance testing
• Bundle Analysis: Webpack bundle size optimization
• Core Web Vitals: LCP, FID, CLS monitoring

Application Monitoring

• Winston Logging: Structured logging with different levels
• Error Tracking: Comprehensive error handling and reporting
• Database Monitoring: Query performance and connection pooling

User Analytics

• Admin Dashboard: Real-time user and file statistics
• Survey Collection: User feedback and satisfaction tracking
• Usage Metrics: File uploads, messages, and engagement

🔧 Scripts

Development

yarn dev              # Start development servers
yarn build            # Build all packages
yarn lint             # Lint all code
yarn type-check       # TypeScript type checking
yarn format           # Format code with Prettier

Database

yarn db:generate      # Generate Prisma client
yarn db:migrate       # Run database migrations
yarn db:push          # Push schema changes
yarn db:studio        # Open Prisma Studio

Production

yarn start:frontend   # Start production frontend
yarn start:backend    # Start production backend
yarn audit            # Security audit

🛡️ Security

Implemented Security Measures

• JWT Authentication: Secure token-based authentication
• Input Validation: Zod schemas for all API inputs
• Rate Limiting: Prevent abuse and DDoS attacks
• CORS Protection: Configured for production domains
• Security Headers: Helmet.js for security headers
• File Validation: Strict file type and size limits
• SQL Injection Prevention: Prisma ORM with parameterized queries
• XSS Protection: Content Security Policy headers

Security Best Practices

• Environment variables for sensitive data
• Regular dependency updates
• Security scanning in CI/CD
• Role-based access control
• Audit logging for admin actions

🤝 Contributing

Development Workflow

1. Create a feature branch: git checkout -b feature/your-feature
2. Make your changes and commit: git commit -m "feat: your feature"
3. Push to GitHub: git push origin feature/your-feature
4. Create a Pull Request

Code Standards

• TypeScript for type safety
• ESLint for code quality
• Prettier for code formatting
• Conventional commits for changelog generation
• Test coverage for new features

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🆘 Support

Getting Help

• Documentation: Check this README and inline code comments
• Issues: Create GitHub issues for bugs or feature requests
• Discussions: Use GitHub Discussions for questions

Common Issues

Database Connection Issues

# Check PostgreSQL is running
pg_isready -h localhost -p 5432

# Reset database
yarn db:push --force-reset

Build Issues

# Clear caches
yarn clean
rm -rf node_modules
yarn install

Environment Issues

# Verify environment variables
yarn db:generate  # Should work without errors

🎯 Roadmap

Phase 1 (Current MVP)

• ✅ Core chat functionality
• ✅ File upload and processing
• ✅ User authentication
• ✅ Admin panel
• ✅ PWA features

Phase 2 (Future Enhancements)

• Advanced AI models integration
• Real-time collaboration features
• Advanced file processing (OCR, image analysis)
• Mobile app (React Native)
• Enterprise features (SSO, advanced admin tools)

Phase 3 (Scale)

• Multi-tenant architecture
• Advanced analytics and reporting
• API marketplace
• Third-party integrations
• White-label solutions

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Built with ❤️ for the HumanLenk MVP project

For more information, visit our GitHub repository or contact the development team.