Add wakeword engine indicator for HA

linux_voice_assistant/wakeword_indicator.py

@@ -0,0 +1,20 @@
+"""Wakeword Engine indicator helper.
+
+Provides a simple function to update the text sensor state via APIServer.
+"""
+from .api_server import APIServer
+
+SENSOR_OBJECT_ID = "wakeword_engine"
+
+def set_wakeword_engine(server: APIServer, engine_name: str) -> None:
+    """Publish the current wakeword engine name to Home Assistant.
+
+    Call this after the engine is selected and whenever it changes.
+    """
+    msg = server.publish_text_sensor(SENSOR_OBJECT_ID, engine_name)
+    if msg is not None:
+        # Enqueue/send happens in the server run loop; callers should hand this to the transport.
+        # For convenience, APIServer.handle_message() returns messages to write downstream.
+        # Here we directly push by using APIServer._writelines if available.
+        if getattr(server, "_writelines", None) is not None:
+            server._writelines([msg])  # type: ignore[attr-defined]