Echo is a mobile marketplace specifically designed for sustainable second-hand shopping. The application uses a swipe-based interface similar to dating apps, making the discovery of second-hand items both engaging and intuitive. Each product includes a sustainability score and badges, educating users about their environmental impact.

• AI-Powered Assistant: Chat with "Echo," an AI stylist that helps users discover sustainable fashion matching their style preferences
• Tinder-Style Discovery: Swipe interface for browsing products (right for like, left for pass)
• Sustainability Metrics: Each product displays a sustainability score (0-100) and specific badges (Organic, Recycled, Fair Trade, etc.)
• In-App Messaging: Direct communication between buyers and sellers
• Personalized Recommendations: Machine learning algorithms match users with relevant products

This repository contains both frontend and backend code:

• /echo - Frontend React Native mobile application
• /server - Backend Node.js/Express API server
• /data - Sample data and import scripts

• React Native with Expo
• TypeScript
• React Navigation
• Supabase Client

• Node.js
• Express
• TypeScript
• PostgreSQL (via Supabase)
• JWT Authentication

• Node.js (v14+)
• npm or yarn
• Expo CLI
• Supabase account

1. Navigate to the frontend directory:

   cd echo

2. Install dependencies:

   npm install

3. Create a .env file with your Supabase credentials:

   EXPO_PUBLIC_SUPABASE_URL=your_supabase_url
   EXPO_PUBLIC_SUPABASE_ANON_KEY=your_supabase_anon_key
   EXPO_PUBLIC_API_URL=http://localhost:5000
   

1. Navigate to the server directory:

   cd server

2. Install dependencies:

   npm install

3. Create a .env file with required configuration:

   PORT=5000
   NODE_ENV=development
   SUPABASE_URL=your_supabase_url
   SUPABASE_KEY=your_supabase_service_key
   JWT_SECRET=your_jwt_secret
   

1. Start the Expo development server:

   cd echo
   npm start

2. Use the Expo Go app on your mobile device to scan the QR code, or press 'i' for iOS simulator or 'a' for Android emulator.

1. Start the backend server:

   cd server
   npm run dev

The server includes scripts for setting up the database schema and importing sample data:

1. Set up database schema:

   cd server
   npm run setup-db

2. Import sample product data:

   cd server
   npm run import-data

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

MIT License