Jul 13 - Optimize code

app/services/expiry_notifications.py

@@ -11,6 +11,7 @@ use the existing `attributes` JSON and a private `_notified` sub-key so no migra
 is required.  The key is prefixed with `_` to avoid colliding with user attributes.
 """
 from datetime import datetime, timedelta
+from app.utils.time import utcnow
 from flask import current_app
 from app.extensions import db
 from app.models.listing import Listing
@@ -25,13 +26,13 @@ def _already_notified(listing, key: str) -> bool:
 
 def _mark_notified(listing, key: str):
     attrs = dict(listing.attributes or {})
-    attrs[key] = datetime.utcnow().isoformat()
+    attrs[key] = utcnow().isoformat()
     listing.attributes = attrs
 
 
 def warn_expiring(days: int = 3) -> int:
     """Send warning emails for listings expiring within `days` days. Returns count."""
-    now = datetime.utcnow()
+    now = utcnow()
     window_end = now + timedelta(days=days)
     soon = (Listing.query
             .filter(Listing.status == ListingStatus.active,