init

backend/app/services/auth.py

@@ -0,0 +1,42 @@
+from uuid import UUID
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
+from ..models.user import User
+from ..database import get_db
+from ..utils.security import decode_token
+
+security = HTTPBearer()
+
+
+async def get_current_user(
+    credentials: HTTPAuthorizationCredentials = Depends(security),
+    db: AsyncSession = Depends(get_db),
+) -> User:
+    token = credentials.credentials
+    payload = decode_token(token)
+
+    if payload is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid token",
+        )
+
+    user_id = payload.get("sub")
+    if user_id is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid token",
+        )
+
+    result = await db.execute(select(User).where(User.id == UUID(user_id)))
+    user = result.scalar_one_or_none()
+
+    if user is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found",
+        )
+
+    return user