Initial commit

backend/app/deps.py

@@ -0,0 +1,43 @@
+from typing import Annotated
+
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from jose import JWTError, jwt
+from sqlmodel import Session, select
+
+from app.core.config import get_settings
+from app.database import get_session
+from app.models import User
+from app.schemas import TokenData
+
+settings = get_settings()
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/auth/token")
+
+SessionDep = Annotated[Session, Depends(get_session)]
+
+
+def get_current_user(
+    session: SessionDep,
+    token: Annotated[str, Depends(oauth2_scheme)],
+) -> User:
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = jwt.decode(token, settings.secret_key, algorithms=[settings.algorithm])
+        username = payload.get("sub")
+        if username is None:
+            raise credentials_exception
+        token_data = TokenData(username=username)
+    except JWTError:
+        raise credentials_exception
+
+    user = session.exec(select(User).where(User.username == token_data.username)).first()
+    if user is None:
+        raise credentials_exception
+    return user
+
+
+CurrentUserDep = Annotated[User, Depends(get_current_user)]