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Authentication System Changes

Overview

Successfully migrated from Google OAuth authentication to email/password authentication with domain restriction to @vit.edu.in emails.

Changes Made

1. Firebase Configuration (src/lib/firebase.ts)

  • ✅ Removed GoogleAuthProvider import and export
  • ✅ Kept basic Firebase auth setup for email/password authentication
  • ✅ Removed googleAuthProvider instance

2. Authentication Context (src/contexts/AuthContext.tsx)

  • ✅ Replaced Google authentication methods with email/password:
    • Removed: signInWithGoogle()
    • Added: signIn(email: string, password: string)
    • Added: signUp(email: string, password: string, displayName: string)
  • ✅ Added comprehensive email domain validation:
    • Validates @vit.edu.in domain before authentication
    • Shows appropriate error messages for invalid domains
  • ✅ Enhanced error handling with specific error codes:
    • auth/user-not-found
    • auth/wrong-password
    • auth/invalid-email
    • auth/user-disabled
    • auth/too-many-requests
    • auth/email-already-in-use
    • auth/weak-password
  • ✅ Added email verification for new account signup
  • ✅ Updated user profile handling with display name support

3. New Authentication Form Component (src/components/ui/auth-form.tsx)

  • ✅ Created comprehensive auth form with:
    • Tabbed interface (Sign In / Sign Up)
    • Form validation using Zod schemas
    • Email domain validation (@vit.edu.in)
    • Password visibility toggles
    • Loading states and error handling
    • Proper form field icons
    • Responsive design

4. Updated UI Components

Home Page (src/app/page.tsx)

  • ✅ Replaced Google sign-in button with new AuthForm component
  • ✅ Updated welcome messaging

Header Component (src/components/layout/Header.tsx)

  • ✅ Removed signInWithGoogle references
  • ✅ Updated sign-in button to redirect to home page
  • ✅ Maintained user dropdown functionality

5. Fixed TypeScript Issues

  • ✅ Fixed service layer type casting issues in eventService.ts
  • ✅ All components now pass type checking

Domain Validation Features

Email Validation

  • ✅ Client-side validation: Forms reject non-@vit.edu.in emails
  • ✅ Context-level validation: Auth methods validate domain before Firebase calls
  • ✅ Session validation: Existing users with invalid domains are automatically signed out

Error Messages

  • ✅ Clear, user-friendly error messages for domain validation
  • ✅ Specific error messages for different authentication failure scenarios
  • ✅ Toast notifications for all auth actions

Firebase Configuration Required

Enable Email/Password Authentication

  1. Go to Firebase Console → Authentication → Sign-in method
  2. Enable "Email/Password" provider
  3. Optionally disable "Google" provider

Environment Variables

See ENV_VARIABLES.md for complete list of required environment variables.

Security Features

Email Verification

  • ✅ Automatic email verification sent upon signup
  • ✅ Users can sign in immediately but should verify email

Password Requirements

  • ✅ Minimum 6 characters (Firebase default)
  • ✅ Can be enhanced with additional complexity rules

Domain Restriction

  • ✅ Hard-coded domain restriction to @vit.edu.in
  • ✅ Validation at multiple levels (form, auth context, session)

Testing the Changes

Manual Testing Checklist

  • Navigate to home page - should see new auth form
  • Try signing up with non-@vit.edu.in email - should show error
  • Try signing up with @vit.edu.in email - should work
  • Try signing in with correct credentials - should work
  • Try signing in with wrong password - should show error
  • Check email verification is sent
  • Test sign out functionality
  • Verify protected routes still work correctly

Backward Compatibility

  • ✅ All existing authenticated user sessions remain valid
  • ✅ Existing user data structure preserved
  • ✅ No database migrations required
  • ✅ Existing components work with new auth system

Next Steps (Optional Enhancements)

  • Add password reset functionality
  • Add email verification requirement before full access
  • Enhance password complexity requirements
  • Add rate limiting for failed attempts
  • Add remember me functionality
  • Add user profile management

Files Modified

src/lib/firebase.ts
src/contexts/AuthContext.tsx
src/components/ui/auth-form.tsx (new)
src/app/page.tsx
src/components/layout/Header.tsx
src/lib/services/eventService.ts (type fixes)
ENV_VARIABLES.md (new)
AUTHENTICATION_CHANGES.md (new)

✅ Migration Complete: The application now uses email/password authentication with @vit.edu.in domain restriction.