Add auth foundation and app DB management

app/dependencies.py

@@ -1,17 +1,24 @@
 from collections.abc import Generator
 
+from fastapi import Depends, Request
 from sqlalchemy.orm import Session
 
+from app.auth_db import get_auth_db_session
 from app.config import Settings, get_settings
 from app.db import get_db_session
 from app.integrations.homeassistant import HomeAssistantClient
 from app.poo_db import get_poo_db_session
+from app.services.auth import AuthenticatedSession, get_authenticated_session
 
 
 def get_app_settings() -> Settings:
     return get_settings()
 
 
+def get_auth_db() -> Generator[Session, None, None]:
+    yield from get_auth_db_session()
+
+
 def get_db() -> Generator[Session, None, None]:
     yield from get_db_session()
 
@@ -22,3 +29,12 @@ def get_poo_db() -> Generator[Session, None, None]:
 
 def get_homeassistant_client() -> HomeAssistantClient:
     return HomeAssistantClient(get_settings())
+
+
+def get_current_auth_session(
+    request: Request,
+    session: Session = Depends(get_auth_db),
+    settings: Settings = Depends(get_app_settings),
+) -> AuthenticatedSession | None:
+    raw_token = request.cookies.get(settings.auth_session_cookie_name)
+    return get_authenticated_session(session, raw_token=raw_token)