Add play/pause command support to HassUserClient with button component

hasspy/mqtt.py

@@ -175,3 +175,22 @@ class HassSystemClient(HassClient):
 class HassUserClient(HassClient):
     def __init__(self, node_id: str, config: Mapping[str, Any]) -> None:
         super().__init__(f"{node_id}_{getpass.getuser()}", config)
+
+    def do_command(self, payload: str) -> None:
+        super().do_command(payload)
+
+        match payload:
+            case "PLAY_PAUSE":
+                log.info("Toggling play/pause…")
+                run(["playerctl", "play-pause"])
+
+    @property
+    def components(self) -> dict[str, dict[str, str]]:
+        return {
+            "play-pause": {
+                "unique_id": f"{self.node_id}_play_pause",
+                "p": "button",
+                "name": "Play/Pause",
+                "payload_press": "PLAY_PAUSE",
+            },
+        }