Nuevos cambios en el backend

backend/app/core/auth.py

@@ -0,0 +1,21 @@
+from typing import Annotated
+
+from fastapi import Depends
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+from sqlalchemy.orm import Session
+
+from app.core.errors import UnauthorizedError
+from app.db.session import get_db
+from app.models.user import User
+from app.services.auth_service import AuthService, get_auth_service
+
+bearer_scheme = HTTPBearer(auto_error=False)
+
+
+def get_current_user(
+    credentials: Annotated[HTTPAuthorizationCredentials | None, Depends(bearer_scheme)],
+    auth_service: Annotated[AuthService, Depends(get_auth_service)],
+) -> User:
+    if credentials is None or credentials.scheme.lower() != "bearer":
+        raise UnauthorizedError("Missing or invalid authorization token")
+    return auth_service.get_user_by_id(auth_service.decode_user_id(credentials.credentials))