Healthline App 🏥

Healthline is a full-stack telemedicine application designed to bridge the gap in rural healthcare. It features role-based access for doctors and patients, an AI-powered symptom checker, digital health records via QR codes, and integrated video consultations.

Built with React Native (Expo) and Node.js.

✨ Features

• 🔐 Role-Based Authentication:
  • Secure Login/Signup for Doctors and Patients.
  • Doctors can access all patient records; Patients can only access their own history.
• 🤖 AI Symptom Checker:
  • Integrated with Google Gemini 2.5 Flash.
  • Smart chat interface for preliminary symptom triage.
• 📱 Digital Health Records:
  • Generates instant QR Codes for patient data for easy sharing.
• 📹 Video Telemedicine:
  • Integrated video calling using VideoSDK (Requires Development Build).
• 🛡️ Secure Backend:
  • SQLite database with encrypted passwords (bcrypt).
  • REST API with role-based data filtering.

🛠️ Tech Stack

• Frontend: React Native, Expo Router, TypeScript
• Backend: Node.js, Express.js, SQLite
• AI: Google Gemini API (@google/generative-ai)
• Video: VideoSDK (@videosdk.live/react-native-sdk)

---

🚀 Getting Started

Follow these instructions to set up the project locally.

1. Backend Setup

The backend manages the database, authentication, and AI connection.

1. Navigate to the backend folder:

   cd backend

2. Install dependencies:

   npm install

3. Configure Environment Variables: Create a file named .env in the backend folder and add your Gemini API Key:

   GEMINI_API_KEY=Your_Google_Gemini_Key_Here

4. Start the Server:

   node server.js

   You should see: 🚀 Server running on http://localhost:5000

2. Frontend Setup

The frontend is the mobile application.

1. Navigate to the project root (where app folder is):

   cd ..
   # or cd frontend/frontend depending on your structure

2. Install dependencies:

   npm install

3. Configure IP Address: You must update the API_URL in the following files to match your computer's Local IP Address (find it using ipconfig or ifconfig):

   • app/(auth)/login.tsx
   • app/(auth)/register.tsx
   • app/(app)/dashboard.tsx
   • app/(app)/ai_chat.tsx

   Example:

   const API_URL = "[http://192.168.1.5:5000](http://192.168.1.5:5000)"; // Use your actual IP, not localhost!

4. Start the App:

   npx expo start -c

5. Scan the QR code with the Expo Go app on your phone (Android/iOS).

---

⚠️ Important Troubleshooting

If you see "Network Request Failed" or "Unreachable" on your phone:

1. Check Wi-Fi: Ensure your phone and computer are on the exact same Wi-Fi network.
2. Windows Firewall:
   • You may need to create an Inbound Rule in Windows Firewall to allow traffic on Port 5000.
   • Alternatively, ensure your Network Profile is set to Private, not Public.
3. Server Address:
   • The server must listen on 0.0.0.0, NOT localhost.
   • Note: The provided server.js is already configured correctly for this.

📹 Note on Video Calling

The Video Calling feature uses native WebRTC modules. It will not work in the standard Expo Go client.

To test video calling, you must create a Development Build:

npx expo run:android
# OR
eas build --profile development --platform android