David/refactor front end

[ludavidca]

JIRA ticket link

Refactor Front End

Implementation description

Steps to test

What should reviewers focus on?

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR

[claude]

PR Review: Frontend Authentication Refactoring

Overview

This PR represents a substantial refactoring that introduces Firebase-based authentication with OAuth support. The implementation establishes a solid foundation for auth, but there are several security concerns and best practice issues that should be addressed before merging.

🔴 Critical Issues

1. Missing Input Validation on OAuth Endpoint

backend/python/app/routers/auth_routes.py:230

Issue: The endpoint accepts unvalidated dict input instead of a Pydantic model. This bypasses FastAPI's built-in validation.

Recommendation: Create a Pydantic schema for the OAuth request body.

2. Weak Password Requirements

frontend/src/components/auth/Signup.tsx:36-39

Issue: 6-character minimum is below NIST recommendations (8-12 characters minimum).

Recommendation: Increase to at least 8 characters and consider adding complexity requirements.

3. Potential State Inconsistency in Signup Flow

frontend/src/providers/AuthProvider.tsx:99-135

The signup process is two-phase:

1. Create driver in backend (POST /auth/register)
2. Sign in with Firebase

Issue: If step 1 succeeds but step 2 fails, a driver record exists in the database but the user cannot authenticate. This creates orphaned records.

Recommendation: Consider wrapping both operations in a transaction-like pattern or implementing cleanup logic for failed signups.

⚠️ Security Concerns

4. localStorage Token Storage

frontend/src/providers/AuthProvider.tsx:42-45

Concern: If userData contains access tokens, storing them in localStorage exposes them to XSS attacks.

Recommendation:

• Verify that only non-sensitive data is stored
• Consider using httpOnly cookies for tokens (already using withCredentials: true)
• Document what data is being persisted and why

5. Missing Input Validation on Frontend

Multiple files: Login.tsx, Signup.tsx, ResetPassword.tsx

Issue: No client-side validation for email format, phone number format, license plate format, or address format.

Recommendation: Add validation before submitting to improve UX and catch errors early.

6. Silent Failure Handling

frontend/src/APIClients/FirebaseAuthAPIClient.ts:8-22

Functions like getIdToken() return null without distinguishing between user not authenticated, token refresh failed, or Firebase initialization error.

Recommendation: Use discriminated unions or custom error types to provide better error context.

🟡 Code Quality Issues

7. Loose Type Safety

Multiple locations use any type (AuthProvider.tsx:74, Login.tsx:26, Signup.tsx:45)

Recommendation: Use unknown and proper type guards instead of any.

8. No Environment Variable Validation

frontend/src/config/firebase.ts:4-11

Issue: Firebase initialization proceeds even if env vars are undefined, leading to cryptic runtime errors.

Recommendation: Add validation to ensure all required environment variables are present before initialization.

9. Complex State Management in AuthProvider

The provider manages loading, user state, and multiple auth flows with simple useState hooks.

Recommendation: Consider using useReducer for more predictable state transitions.

📋 Testing Coverage

10. No New Tests for Auth Flow

Issue: The PR deletes the only test file (Default.test.tsx) without adding tests for AuthProvider state management, Login/Signup flows, OAuth flow, or error handling.

Recommendation: Add integration tests for critical auth flows including successful login, failed login with invalid credentials, OAuth flow, signup with validation errors, and token refresh scenarios.

✅ Positive Observations

1. Clean Architecture - Good separation between API clients, providers, and components
2. Error Handling Structure - Consistent try/catch patterns throughout
3. Loading States - Proper UX with loading indicators during async operations
4. Firebase Integration - Correct use of onAuthStateChanged for auth state management
5. Backend Security - Authorization checks on sensitive endpoints (logout, password reset)
6. Dependency Injection - Proper use of FastAPI dependencies in backend routes

📝 Recommendations Summary

Before Merge (Critical):

1. Add Pydantic model validation for /auth/oauth endpoint
2. Increase password minimum to 8+ characters
3. Document or fix localStorage token storage approach
4. Add client-side input validation
5. Handle signup flow state inconsistency

Follow-up (Important):

1. Add comprehensive test coverage for auth flows
2. Improve error type safety (remove any types)
3. Add environment variable validation
4. Consider useReducer for AuthProvider state
5. Add rate limiting to auth endpoints (backend)

Nice-to-Have:

1. Add JSDoc comments to exported functions
2. Extract form validation logic to reusable utilities
3. Add error boundaries around auth components
4. Implement retry logic for failed sync operations

📊 Summary

Risk Level: Medium-High (due to auth security concerns)
Code Quality: Good (well-structured, but needs refinement)
Test Coverage: Insufficient (no tests for new functionality)

This is a solid foundation for Firebase authentication, but the security and validation concerns should be addressed before merging to production. The architecture is clean and maintainable, which will make implementing the recommendations straightforward.

Great work on the comprehensive refactoring! 🎉

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Review generated by Claude Code