wip user reg

backend/trading_journal/service.py

@@ -0,0 +1,72 @@
+from typing import Callable
+
+from fastapi import Request, Response, status
+from fastapi.responses import JSONResponse
+from sqlmodel import Session
+from starlette.middleware.base import BaseHTTPMiddleware
+
+import settings
+from trading_journal import crud, security
+from trading_journal.db import Database
+from trading_journal.dto import UserCreate, UserRead
+from trading_journal.models import Sessions
+
+EXCEPT_PATHS = [
+    f"{settings.settings.api_base}/status",
+    f"{settings.settings.api_base}/register",
+]
+
+
+class AuthMiddleWare(BaseHTTPMiddleware):
+    async def dispatch(self, request: Request, call_next: Callable[[Request], Response]) -> Response:
+        if request.url.path in EXCEPT_PATHS:
+            return await call_next(request)
+
+        token = request.cookies.get("session_token")
+        if not token:
+            auth_header = request.headers.get("Authorization")
+            if auth_header and auth_header.startswith("Bearer "):
+                token = auth_header[len("Bearer ") :]
+
+        if not token:
+            return JSONResponse(
+                status_code=status.HTTP_401_UNAUTHORIZED,
+                content={"detail": "Unauthorized"},
+            )
+
+        db_factory: Database | None = getattr(request.app.state, "db_factory", None)
+        if db_factory is None:
+            return JSONResponse(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, content={"detail": "db factory not configured"})
+        try:
+            with db_factory.get_session_ctx_manager() as request_session:
+                hashed_token = security.hash_session_token_sha256(token)
+                request.state.db_session = request_session
+                login_session: Sessions | None = crud.get_login_session_by_token_hash(request.state.db_session, hashed_token)
+        except Exception:  # noqa: BLE001
+            return JSONResponse(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, content={"detail": "db error"})
+
+        return None
+
+
+class ServiceError(Exception):
+    pass
+
+
+class UserAlreadyExistsError(ServiceError):
+    pass
+
+
+def register_user_service(db_session: Session, user_in: UserCreate) -> UserRead:
+    if crud.get_user_by_username(db_session, user_in.username):
+        raise UserAlreadyExistsError("username already exists")
+    hashed = security.hash_password(user_in.password)
+    try:
+        user = crud.create_user(db_session, username=user_in.username, hashed_password=hashed)
+        try:
+            # prefer pydantic's from_orm if DTO supports orm_mode
+            user = UserRead.model_validate(user)
+        except Exception as e:
+            raise ServiceError("Failed to convert user to UserRead") from e
+    except Exception as e:
+        raise ServiceError("Failed to create user") from e
+    return user