template tutoring-admin-dashboard v1

backend/app/security.py

@@ -0,0 +1,66 @@
+"""Password hashing + JWT tokens for the single admin account."""
+
+from __future__ import annotations
+
+import os
+from datetime import datetime, timedelta, timezone
+
+import jwt
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from passlib.context import CryptContext
+from sqlalchemy.orm import Session
+
+from app.db import get_db
+from app.models import AdminUser
+
+_pwd = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+SECRET_KEY = os.getenv("JWT_SECRET", "swatiyadav-dev-secret-change-me")
+ALGORITHM = "HS256"
+TOKEN_TTL_HOURS = 24 * 7
+
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="api/auth/login", auto_error=False)
+
+
+def hash_password(password: str) -> str:
+    return _pwd.hash(password)
+
+
+def verify_password(password: str, hashed: str) -> bool:
+    try:
+        return _pwd.verify(password, hashed)
+    except Exception:  # noqa: BLE001
+        return False
+
+
+def create_token(username: str) -> str:
+    payload = {
+        "sub": username,
+        "exp": datetime.now(timezone.utc) + timedelta(hours=TOKEN_TTL_HOURS),
+    }
+    return jwt.encode(payload, SECRET_KEY, algorithm=ALGORITHM)
+
+
+def get_current_admin(
+    token: str | None = Depends(oauth2_scheme),
+    db: Session = Depends(get_db),
+) -> AdminUser:
+    creds_error = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Not authenticated",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    if not token:
+        raise creds_error
+    try:
+        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        username = payload.get("sub")
+    except jwt.PyJWTError:
+        raise creds_error from None
+    if not username:
+        raise creds_error
+    user = db.query(AdminUser).filter(AdminUser.username == username).first()
+    if not user:
+        raise creds_error
+    return user