chitfund/SIGNUP_FEATURE_IMPLEMENTATION.md at 43d41f04c7e1b0e1144ff4373600ff130829256d

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Overview

A complete user signup/registration functionality has been added to the LuckyChit application, allowing new users to create accounts independently without requiring a manager to create them.

Changes Made

1. Backend Implementation

Authentication Controller (`backend/src/controllers/authController.js`)

Added signup function: A new public endpoint that allows users to register themselves
Features:
- Required fields: mobile_number, full_name, password
- Optional fields: email, address, emergency_contact
- Comprehensive validation for all fields:
  - Mobile number must be exactly 10 digits
  - Password must be at least 6 characters
  - Email validation (if provided)
  - Emergency contact validation (if provided)
- Checks for duplicate mobile numbers
- Automatic password hashing via User model hooks
- New users are created with role: 'member' by default
- Automatically logs in the user after signup (returns JWT token)

Authentication Routes (`backend/src/routes/auth.js`)

Added public signup route: POST /auth/signup
Route is placed before the authenticateToken middleware, making it publicly accessible

2. Frontend Implementation

API Service (`luckychit/lib/core/services/api_service.dart`)

Added signup method: Handles HTTP POST request to /auth/signup
Accepts all required and optional fields
Automatically saves JWT token upon successful signup

Auth Service (`luckychit/lib/core/services/auth_service.dart`)

Added signup method: Manages signup flow
Handles response processing
Automatically saves user data and authentication state
Provides error handling with user-friendly messages

Signup Screen (`luckychit/lib/features/auth/views/signup_screen.dart`)

New beautiful UI matching the existing login screen design
Form fields:
- Mobile Number (required) - with 10-digit validation
- Full Name (required)
- Email (optional) - with email format validation
- Address (optional) - multi-line text field
- Emergency Contact (optional) - with 10-digit validation
- Password (required) - with visibility toggle, minimum 6 characters
- Confirm Password (required) - must match password
Features:
- Real-time form validation
- Loading state during signup
- Success/error snackbar messages
- "Already have an account? Login" link
- Consistent with app's green theme and design language

Login Screen Updates (`luckychit/lib/features/auth/views/login_screen.dart`)

Added "Don't have an account? Sign Up" link: Navigates to the signup screen
Import added for the new signup screen

3. Documentation

API Documentation (`backend/API_DOCUMENTATION.md`)

Added comprehensive signup endpoint documentation:
- Endpoint URL and method
- Request body structure with all fields
- Required vs optional fields clearly marked
- Example response with all fields
- Success response structure

Test Script (`backend/test-signup.js`)

Comprehensive test suite for the signup functionality:
- Tests successful signup with all fields
- Tests login with newly created account
- Tests profile retrieval
- Tests validation errors:
  - Missing required fields
  - Invalid mobile number format
  - Short password
  - Duplicate mobile number
- Provides clear console output for all test cases

API Endpoint Details

POST /api/auth/signup

Request Body:

{
  "mobile_number": "9876543210",
  "full_name": "John Doe",
  "password": "password123",
  "email": "john@example.com",          // Optional
  "address": "123 Main St",             // Optional
  "emergency_contact": "9876543211"     // Optional
}

Success Response (201):

{
  "success": true,
  "message": "Account created successfully",
  "data": {
    "token": "eyJhbGciOiJIUzI1NiIs...",
    "user": {
      "id": "uuid",
      "mobile_number": "9876543210",
      "full_name": "John Doe",
      "email": "john@example.com",
      "address": "123 Main St",
      "emergency_contact": "9876543211",
      "role": "member",
      "is_active": true,
      "created_at": "2025-11-05T10:30:00.000Z",
      "updated_at": "2025-11-05T10:30:00.000Z"
    }
  }
}

Error Responses:

400 Bad Request: Validation errors (missing fields, invalid format, duplicate mobile)
500 Internal Server Error: Server-side errors

Validation Rules

Mobile Number

Must be exactly 10 digits
Must contain only numbers
Must be unique (not already registered)

Full Name

Required field
No specific format restrictions

Password

Must be at least 6 characters long
Automatically hashed using bcrypt (12 rounds)

Email (Optional)

Must be valid email format
Regex: ^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$

Address (Optional)

Text field, no restrictions

Emergency Contact (Optional)

Must be exactly 10 digits if provided
Must contain only numbers

Testing Instructions

Backend Testing

Start the backend server:
```
cd backend
npm start
```
Run the test script:
```
node test-signup.js
```

Manual API testing with curl:

curl -X POST http://localhost:3000/api/auth/signup \
  -H "Content-Type: application/json" \
  -d '{
    "mobile_number": "9123456789",
    "full_name": "Test User",
    "password": "test123456",
    "email": "test@example.com"
  }'

Frontend Testing

Run the Flutter app:
```
cd luckychit
flutter run
```
Test the signup flow:
- On the login screen, tap "Sign Up"
- Fill in all required fields (mobile, name, password, confirm password)
- Optionally fill in email, address, emergency contact
- Tap "Sign Up" button
- Should automatically log in and navigate to member dashboard
Test validation:
- Try submitting without required fields
- Try invalid mobile number (not 10 digits)
- Try mismatched passwords
- Try invalid email format

User Flow

New User Registration:
- User opens the app → sees Login screen
- User taps "Sign Up" link
- User fills in the signup form
- User submits the form
- Backend validates and creates the account
- User is automatically logged in
- User is redirected to Member Dashboard
Existing User:
- User can still use the "Login" option
- From signup screen, user can navigate back to login via "Already have an account? Login" link

Security Features

Password Security:
- Passwords are hashed using bcrypt with 12 salt rounds
- Plain text passwords are never stored
- Password hashing happens automatically via Sequelize hooks
JWT Authentication:
- Upon successful signup, JWT token is generated and returned
- Token contains user ID, role, and mobile number
- Token expires in 24 hours (configurable via JWT_EXPIRES_IN env variable)
Input Validation:
- All inputs are validated on both frontend and backend
- SQL injection prevention via Sequelize ORM
- XSS prevention via input sanitization

Database Impact

No database schema changes were needed. The existing users table supports all the signup functionality:

All required fields already exist
The created_by field is set to null for self-registered users (vs manager-created users)
Role is automatically set to 'member' for signups

Future Enhancements (Optional)

Email Verification:
- Send verification email after signup
- Require email verification before full access
OTP Verification:
- SMS-based mobile number verification
- Two-factor authentication
Social Login:
- Google Sign-In
- Facebook Login
Password Strength Indicator:
- Visual feedback on password strength
- Recommendations for stronger passwords
Terms and Conditions:
- Checkbox to accept terms
- Link to privacy policy

Compatibility

✅ No breaking changes to existing functionality
✅ Existing login flow remains unchanged
✅ Manager's "Create Member" functionality still works
✅ All existing API endpoints remain functional
✅ Database backward compatible

Files Modified

Backend

backend/src/controllers/authController.js - Added signup function
backend/src/routes/auth.js - Added signup route
backend/API_DOCUMENTATION.md - Added signup documentation

Frontend

luckychit/lib/core/services/api_service.dart - Added signup API method
luckychit/lib/core/services/auth_service.dart - Added signup service method
luckychit/lib/features/auth/views/login_screen.dart - Added signup link
luckychit/lib/features/auth/views/signup_screen.dart - NEW: Complete signup UI

Documentation

SIGNUP_FEATURE_IMPLEMENTATION.md - This file

Testing

backend/test-signup.js - NEW: Comprehensive test suite

Support

For any issues or questions regarding the signup functionality, please refer to:

API Documentation: backend/API_DOCUMENTATION.md
Test Script: backend/test-signup.js
This Implementation Guide: SIGNUP_FEATURE_IMPLEMENTATION.md

9.0 KiB Raw Blame History

Signup Feature Implementation