Authentication System Implementation and Frontend Integration

[AhmedFatthy1040]

Authentication System Implementation and Frontend Integration

Changes Made

Backend Authentication Implementation

1. Created Authentication System Core:

   • authMiddleware.ts: JWT token verification middleware
   • authController.ts: Login and registration logic
   • User.ts: User model and type definitions
   • authRoutes.ts: Authentication route handlers
   • authService.ts: Core authentication business logic
   • Updated app.ts to include auth routes and middleware

2. Added Authentication Features:

   • JWT-based authentication
   • User registration with password hashing
   • Secure login with credential verification
   • Protected route middleware
   • User model with TypeScript types

3. Added CORS support:

   • Installed cors package and its types
   • Configured CORS middleware in app.ts
   • Set up proper CORS options for credentials

Frontend Implementation

1. Created Authentication Service:

   • Added src/services/authService.ts for auth management
   • Implemented login, signup, and token management
   • Added TypeScript interfaces for auth requests/responses

2. Updated Login Component:

   • Integrated with auth service
   • Added error handling and loading states
   • Implemented token storage
   • Improved UX with loading indicators

3. Updated Signup Component:

   • Connected to auth service
   • Added password validation
   • Simplified form fields
   • Added error handling

4. Enhanced Image Upload:

   • Added authentication token to requests
   • Improved error handling
   • Enhanced UX with loading states

Technical Details

Backend Authentication Flow

1. User Registration:

   • Validate input data
   • Hash password with bcrypt
   • Store user in database
   • Generate JWT token
   • Return user data and token

2. User Login:

   • Verify credentials
   • Compare password hash
   • Generate JWT token
   • Return user data and token

3. Protected Routes:

   • Verify JWT token in middleware
   • Inject user data into request
   • Allow/deny access based on token validity

API Endpoints

• POST /api/auth/register: User registration
• POST /api/auth/login: User login
• POST /api/images/upload: Protected image upload

Authentication Flow

1. User signs up/logs in
2. Backend validates and returns JWT
3. Frontend stores token
4. Protected routes use token
5. Backend validates requests

Testing Instructions

Testing Authentication

1. Register New User:

{
  "username": "testuser",
  "email": "[email protected]",
  "password": "password123"
}

2. Login:

{
  "email": "[email protected]",
  "password": "password123"
}

Testing Protected Routes:

• Login to get token
• Use token for image upload
• Try accessing without token (should fail)
• Try with invalid token (should fail)

Security Implementation:

• Secure password hashing with bcrypt
• JWT token validation
• Protected route middleware
• CORS security
• Input validation
• Error handling
• Secure token storage

Dependencies Added

Backend:

{
  "cors": "^2.8.5",
  "@types/cors": "^2.8.17",
  "bcrypt": "^5.1.1",
  "@types/bcrypt": "^5.0.2",
  "jsonwebtoken": "^9.0.2",
  "@types/jsonwebtoken": "^9.0.7"
}

Database Changes:

Created users table with:

• id
• username
• email
• password (hashed)
• created_at

Related Issues

• Closes Integrate Frontend Upload Form with Backend #19
• Closes Implement JWT-based Authentication System #30
• Closes Frontend Authentication Integration #31

Future Improvements

• Add password reset
• Implement refresh tokens
• Add session management
• Enhance validation
• Add rate limiting
• Implement 2FA
• Add OAuth providers

[justFadel19]

LGTM