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nuzlocke-tracker/backend/src/app/core/auth.py
Julian Tabel e8ded9184b
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feat: auth-aware UI and role-based access control (#67)
## Summary

- Add `is_admin` column to users table with Alembic migration and a `require_admin` FastAPI dependency that protects all admin-facing write endpoints (games, pokemon, evolutions, bosses, routes CRUD)
- Expose admin status to frontend via user API and update AuthContext to fetch/store `isAdmin` after login
- Make navigation menu auth-aware (different links for logged-out, logged-in, and admin users) and protect frontend routes with `ProtectedRoute` and `AdminRoute` components, preserving deep-linking through redirects
- Fix test reliability: `drop_all` before `create_all` to clear stale PostgreSQL enums from interrupted test runs
- Fix test auth: add `admin_client` fixture and use valid UUID for mock user so tests pass with new admin-protected endpoints

## Test plan

- [x] All 252 backend tests pass
- [ ] Verify non-admin users cannot access admin write endpoints (games, pokemon, evolutions, bosses CRUD)
- [ ] Verify admin users can access admin endpoints normally
- [ ] Verify navigation shows correct links for logged-out, logged-in, and admin states
- [ ] Verify `/admin/*` routes redirect non-admin users with a toast
- [ ] Verify `/runs/new` and `/genlockes/new` redirect unauthenticated users to login, then back after auth

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: #67
Co-authored-by: Julian Tabel <juliantabel.jt@gmail.com>
Co-committed-by: Julian Tabel <juliantabel.jt@gmail.com>
2026-03-21 11:44:05 +01:00

108 lines
2.8 KiB
Python

from dataclasses import dataclass
from uuid import UUID
import jwt
from fastapi import Depends, HTTPException, Request, status
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from app.core.config import settings
from app.core.database import get_session
from app.models.user import User
@dataclass
class AuthUser:
"""Authenticated user info extracted from JWT."""
id: str # Supabase user UUID
email: str | None = None
role: str | None = None
def _extract_token(request: Request) -> str | None:
"""Extract Bearer token from Authorization header."""
auth_header = request.headers.get("Authorization")
if not auth_header:
return None
parts = auth_header.split()
if len(parts) != 2 or parts[0].lower() != "bearer":
return None
return parts[1]
def _verify_jwt(token: str) -> dict | None:
"""Verify JWT against Supabase JWT secret. Returns payload or None."""
if not settings.supabase_jwt_secret:
return None
try:
payload = jwt.decode(
token,
settings.supabase_jwt_secret,
algorithms=["HS256"],
audience="authenticated",
)
return payload
except jwt.ExpiredSignatureError:
return None
except jwt.InvalidTokenError:
return None
def get_current_user(request: Request) -> AuthUser | None:
"""
Extract and verify the current user from the request.
Returns AuthUser if valid token, None otherwise.
"""
token = _extract_token(request)
if not token:
return None
payload = _verify_jwt(token)
if not payload:
return None
# Supabase JWT has 'sub' as user ID
user_id = payload.get("sub")
if not user_id:
return None
return AuthUser(
id=user_id,
email=payload.get("email"),
role=payload.get("role"),
)
def require_auth(user: AuthUser | None = Depends(get_current_user)) -> AuthUser:
"""
Dependency that requires authentication.
Raises 401 if no valid token is present.
"""
if user is None:
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Authentication required",
headers={"WWW-Authenticate": "Bearer"},
)
return user
async def require_admin(
user: AuthUser = Depends(require_auth),
session: AsyncSession = Depends(get_session),
) -> AuthUser:
"""
Dependency that requires admin privileges.
Raises 401 if not authenticated, 403 if not an admin.
"""
result = await session.execute(select(User).where(User.id == UUID(user.id)))
db_user = result.scalar_one_or_none()
if db_user is None or not db_user.is_admin:
raise HTTPException(
status_code=status.HTTP_403_FORBIDDEN,
detail="Admin access required",
)
return user