Cache API settings helper (#23)

* Cache API settings helper

* Reuse cached Hygraph service

Author: shayancoin

backend/api/config.py

@@ -1,5 +1,6 @@
 """Configuration settings for the FastAPI application."""
 
+from functools import lru_cache
 from typing import Any, Dict
 
 from pydantic import Field
@@ -45,6 +46,13 @@ class Settings(BaseSettings):
     )
 
 
+@lru_cache()
+def get_settings() -> Settings:
+    """Return a cached instance of :class:`Settings`."""
+
+    return Settings()
+
+
 def get_fastapi_settings() -> Dict[str, Any]:
     """Get FastAPI application settings.
 

backend/api/db.py

@@ -7,7 +7,7 @@
 from sqlalchemy import create_engine
 from sqlalchemy.orm import DeclarativeBase, sessionmaker
 
-from api.config import Settings
+from api.config import get_settings
 
 
 class Base(DeclarativeBase):

backend/api/main.py

@@ -8,7 +8,7 @@
 from fastapi.responses import JSONResponse
 from starlette.middleware.cors import CORSMiddleware
 
-from api.config import Settings
+from api.config import get_settings
 from api.routes import router as api_router
 from api.routes_materials import router as materials_router
 from api.routes_modules import router as modules_router
@@ -24,7 +24,7 @@
 logger = logging.getLogger(__name__)
 
 # Initialize settings
-settings = Settings()
+settings = get_settings()
 
 # Create the FastAPI app
 app = FastAPI(

backend/api/routes_sync.py

@@ -19,6 +19,7 @@
 from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm import Session
 
+from api.config import get_settings
 from api.db import get_db
 from api.models import SyncEvent
 from api.security import require_write_token, validate_hygraph_request
@@ -32,7 +33,15 @@
 logger = logging.getLogger(__name__)
 router = APIRouter(prefix="/api/sync", tags=["sync"])
 
+# Using hygraph_token as webhook secret in MVP; adjust if separate secret provided
+settings = get_settings()
+_hygraph_service = HygraphService(webhook_secret=settings.hygraph_token)
 
+
+def get_hygraph_service() -> HygraphService:
+    """Provide the shared Hygraph service instance."""
+
+    return _hygraph_service
 def _error_envelope(code: str, message: str, details: Optional[dict] = None) -> Dict[str, Any]:
     return {"ok": False, "error": {"code": code, "message": message, "details": details or {}}}