Don's Pay Backend

This repository contains the backend for the Don's Pay project, developed using Java Spring Boot. The backend handles user authentication and registration and integrates with a MySQL database.

Features

• User registration and login functionality.
• Password encryption using BCrypt.
• Integration with MySQL database.
• Secure authentication with Spring Security.

Prerequisites

• Java 17 or higher.
• MySQL database server.
• Maven (for dependency management).

Setup and Configuration

1. Clone the Repository

git clone https://github.com/Vijayagiridharan/Don-s-Pay.git
cd dons-pay-backend

2. Configure the Database

Create a MySQL database named user_transactions_db. Use the following credentials:

• URL: jdbc:mysql://localhost:3306/user_transactions_db
• Username: Donspay
• Password: donspay@123

Alternatively, update the database configuration in src/main/resources/application.properties:

spring.datasource.url=jdbc:mysql://localhost:3306/user_transactions_db
spring.datasource.username=Donspay
spring.datasource.password=donspay@123
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true

3. Build and Run the Application

Use Maven to build and run the application:

mvn clean install
mvn spring-boot:run

4. Test the Endpoints

Login Endpoint

• URL: POST /api/auth/login
• Request Body:

  {
    "email": "[email protected]",
    "password": "securepassword"
  }

• Response:
  • Success: 200 OK

    {
      "message": "Login successful for user: [email protected]"
    }

  • Failure: 401 Unauthorized or other relevant error messages.

Register Endpoint (Optional)

• URL: POST /api/auth/register
• Request Body:

  {
    "email": "[email protected]",
    "password": "securepassword"
  }

• Response:
  • Success: 201 Created

    {
      "message": "User registered successfully"
    }

5. Verify Database Records

Use a MySQL client or GUI to verify that users are stored in the users table with encrypted passwords.

File Structure

• src/main/java/com/acs560/dons_pay_backend
  • entity/User.java - User entity class mapped to the database.
  • repository/UserRepository.java - Interface for database operations.
  • service/AuthService.java - Handles authentication logic.
  • controller/AuthController.java - REST controller for authentication endpoints.
  • DonsPayBackendApplication.java - Main Spring Boot application file.

Troubleshooting

1. Database Connection Issues:

   • Ensure MySQL is running and accessible.
   • Verify database credentials in application.properties.

2. Invalid Credentials:

   • Ensure the password is correctly hashed during registration.
   • Use BCryptPasswordEncoder to verify passwords.

3. Spring Security Configuration:

   • Verify the /api/auth/login endpoint is allowed without prior authentication.

Future Enhancements

• Add user roles and permissions.
• Integrate JWT for session management.
• Implement additional endpoints for transaction management.

License

This project is licensed under the MIT License.

Contact

For further assistance, contact Anshul Abrol.