Refactor power notification handling to use a dedicated method for improved readability and maintainability

hasspy/mqtt.py

@@ -153,12 +153,15 @@ class HassSystemClient(HassClient):
 
         match cmd:
             case "POWER_OFF":
-                self.publish(
+                self.publish_notify("System will be shutting down in 1 minute.")
-                    f"{self.node_id}/user/notify",
-                    "System will be shutting down in 1 minute.",
-                )
             case "POWER_ON":
-                self.publish(f"{self.node_id}/user/notify", "Shutdown cancelled.")
+                self.publish_notify("Shutdown cancelled.")
+
+    def publish_notify(
+        self, payload: str, *args: Any, **kwargs: Any
+    ) -> MQTTMessageInfo:
+        kwargs.setdefault("retain", False)
+        return self.publish(f"{self.node_id}/user/notify", payload, *args, **kwargs)
 
     @property
     def state_topic(self) -> str: