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SIGNUP_IMPLEMENTATION.md

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Signup Endpoint Implementation Summary

✅ Endpoint Implemented

POST /auth/signup

Request Body:

{
  "name": "string",
  "email": "string", 
  "password": "string"
}

Success Response (201):

{
  "message": "User registered successfully",
  "user": {
    "id": number,
    "name": string | null,
    "email": string
  }
}

✅ Features Implemented

Security Features:

  • ✅ Password Hashing: Using bcrypt with salt rounds = 10
  • ✅ No Password in Response: User object returned without password field
  • ✅ Email Uniqueness: Prevents duplicate email registrations
  • ✅ Input Validation: Comprehensive validation for all fields

Validations:

  • ✅ Required Fields: name, email, password must be provided
  • ✅ Email Format: Valid email format validation using regex
  • ✅ Password Length: Minimum 6 characters required
  • ✅ Email Uniqueness: Prevents duplicate registrations

Error Handling:

  • ✅ 400 Bad Request: Invalid input data (missing fields, invalid email, short password)
  • ✅ 409 Conflict: Email already exists
  • ✅ Proper Error Messages: Clear, descriptive error messages

Authentication Compatibility:

  • ✅ Login Integration: Updated login to work with bcrypt passwords
  • ✅ Consistent Security: All passwords now use bcrypt hashing
  • ✅ JWT Generation: Seamless integration with existing auth system

✅ Testing

Bruno Test Collection Created:

  • ✅ Signup user.bru - Successful registration test
  • ✅ Signup - Invalid Email.bru - Email format validation test
  • ✅ Signup - Short Password.bru - Password length validation test
  • ✅ Signup - Duplicate Email.bru - Email uniqueness test
  • ✅ Signup - Missing Fields.bru - Required fields validation test

Manual Testing Results:

# ✅ Successful signup
POST /auth/signup -> 201 Created
Response: {"message":"User registered successfully","user":{"id":3,"name":"Test User","email":"test@example.com"}}

# ✅ Duplicate email
POST /auth/signup -> 409 Conflict  
Response: {"message":"User with this email already exists","error":"Conflict","statusCode":409}

# ✅ Invalid email
POST /auth/signup -> 400 Bad Request
Response: {"message":"Invalid email format","error":"Bad Request","statusCode":400}

# ✅ Short password
POST /auth/signup -> 400 Bad Request
Response: {"message":"Password must be at least 6 characters long","error":"Bad Request","statusCode":400}

# ✅ Missing fields
POST /auth/signup -> 400 Bad Request
Response: {"message":"Name, email, and password are required","error":"Bad Request","statusCode":400}

# ✅ Login with new user
POST /auth/login -> 200 OK
Response: {"userId":3,"access_token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."}

# ✅ Login with seed users (after bcrypt migration)
POST /auth/login -> 200 OK
- alfredo@mail.test / password -> {"userId":1,"access_token":"..."}
- jane@mail.test / password -> {"userId":2,"access_token":"..."}

✅ Files Modified/Created

Updated Files:

  • /src/auth/auth.service.ts - Added signup method and bcrypt password verification
  • /src/auth/auth.controller.ts - Added signup endpoint
  • /prisma/seed.ts - Updated to use bcrypt passwords and properly update existing users

New Test Files:

  • /bruno/aschat/Auth/Signup user.bru
  • /bruno/aschat/Auth/Signup - Invalid Email.bru
  • /bruno/aschat/Auth/Signup - Short Password.bru
  • /bruno/aschat/Auth/Signup - Duplicate Email.bru
  • /bruno/aschat/Auth/Signup - Missing Fields.bru

Dependencies Added:

  • bcrypt - Secure password hashing
  • @types/bcrypt - TypeScript definitions

✅ Security Migration Completed

All MD5 password hashing has been successfully replaced with bcrypt:

  • New user signups use bcrypt with salt rounds = 10
  • Login authentication uses bcrypt.compare()
  • Existing seed users updated to bcrypt passwords
  • Seed file now properly updates existing users with new password hashes

✅ Next Steps

The signup endpoint is fully functional and ready for production use. Future enhancements could include:

  • Email verification workflow
  • Password strength requirements (uppercase, numbers, special characters)
  • Rate limiting for signup attempts
  • User profile completion flow
  • Welcome email notifications

Status: ✅ COMPLETED AND TESTED - All authentication now uses secure bcrypt hashing