first commit

backend/app/services/log_service.py

@@ -0,0 +1,24 @@
+from datetime import datetime, timedelta, timezone
+
+from sqlalchemy.orm import Session
+
+from app.models.log import OperationLog
+
+
+class LogService:
+    def add(self, db: Session, message: str, commit: bool = True) -> None:
+        db.add(OperationLog(message=message))
+        if commit:
+            db.commit()
+
+    def delete_older_than(self, db: Session, days: int) -> int:
+        cutoff = datetime.now(timezone.utc).replace(tzinfo=None) - timedelta(days=days)
+        logs = db.query(OperationLog).filter(OperationLog.timestamp < cutoff).all()
+        count = len(logs)
+        for log in logs:
+            db.delete(log)
+        db.commit()
+        return count
+
+
+log_service = LogService()