Jun 29 - Implement auto reminder 45 min before user's shift end if not finish checking websites

models.py

@@ -1771,8 +1771,11 @@ def get_incomplete_shift_users_near_end(window_minutes: int = 40) -> list:
             conn.close()
 
 
-def record_shift_reminder(user_id: int, shift_id: int) -> None:
-    """Mark that a reminder was sent to this user for this shift today (idempotent)."""
+def record_shift_reminder(user_id: int, shift_id: int) -> int:
+    """
+    Atomically claim a reminder slot for this user+shift today via INSERT IGNORE.
+    Returns 1 if the slot was claimed (caller should send), 0 if already claimed.
+    """
     conn = None
     try:
         conn = get_connection()
@@ -1783,7 +1786,9 @@ def record_shift_reminder(user_id: int, shift_id: int) -> None:
             (user_id, shift_id),
         )
         conn.commit()
+        rows = cur.rowcount
         cur.close()
+        return rows
     finally:
         if conn:
             conn.close()