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📱 Fall Detection - Backend

Backend for the Fall Detection application, designed to detect falls in elderly people and automatically notify a registered close contact.
Built with Spring Boot and PostgreSQL

👥 Contributors

  • rachu033 – Creator of the backend for the Fall Detection application.
  • Fifikula – Developed the frontend in collaboration with rachu033. The frontend repository link will be shared here soon.

🚀 Features

  • Detects user falls (data analysis from the mobile app)
  • Sends push notifications to a registered close contact
  • Authentication and registration with:
    • JWT (authentication & authorization)
    • Google Firebase Authentication (Google account login)
    • Passing the token to the backend for second-level login
  • Secure server-client communication with .p12 keys
  • Data persistence with PostgreSQL
  • Clean architecture with:
    • Model (entity layer)
    • DTO (data transfer objects)
    • Mapper (model <-> DTO mapping)
    • Service layer (business logic)
    • Controller layer (REST API endpoints)
    • Use of interfaces for service abstraction and easier testing

🔐 Authentication

  1. JWT
    • Token generation on login
    • Token validation for each request
    • Token refresh
  2. Google Firebase + Google Account
    • Login in the mobile application
    • Sending the token to the backend
    • Token verification using Firebase Admin SDK
  3. .p12 Keys
    • Secure communication between server and client
    • Configured in Spring Boot Security

📡 Push Notifications

  • Triggered by the backend when a fall is detected
  • Integration with Firebase Cloud Messaging (FCM)
  • Device-specific token management
  • Notifications sent to the registered close contact

🛠 Development Environment

This project was developed using IntelliJ IDEA.

⚠️ Important Notice

The firebaseAdminKey.json file is not included in the repository for security reasons.
You need to create and download your own Firebase service account key from your Firebase Console and place it in the src/main/resources/ directory as firebaseAdminKey.json.