Update user authentication

[martin-markovic]

Summary

This pull request implements several key features and improvements, focusing on user authentication, database integration, and code refactoring.

Changes Implemented

1. User Registration and Login Validation

   • Implemented request and response validation and error handling for registerUser and loginUser.

2. Database Connection

   • Implemented connectDB by integrating mongoose in db.js.
   • Integrated and instantiated connectDB into server.js.

3. Server Test Refactoring

   • Refactored server.test.js by adding describe blocks with before to server initialization tests.
   • Added before and after hooks for socket.io connection tests.

4. User Model Implementation

   • Implemented userModel.js using mongoose.Schema.

5. Package Installation and Integration

   • Installed jsonwebtoken and bcrypt via npm.
   • Integrated these packages alongside the User schema in userController.js.

6. Controller Refactoring

   • Refactored registerUser and loginUser functions to utilize try...catch for error handling.
   • Integrated input validation, user schema validation, user creation, bcrypt password hashing, and error handling within the controller.

7. Environment Variable

   • Added JWT_SECRET to the .env file.

8. Token Generation

   • Implemented generateToken function to generate valid JSON Web Tokens for authentication.

9. Response Enhancement

   • Integrated user data into the response using JSON.

Testing

Updated and refactored userAuth.test.js to cover the new functionality and ensure robustness. Tested for integration.

Installation

Run npm i to install the new dependencies (jsonwebtoken and bcrypt).

Notes

Ensure that .env file contains theJWT_SECRET key. Verify that the database connection string is correctly set in the db.js.