Add websocket API command for Z-Wave network status (#25066)

* Add websocket API command for Z-Wave network status

* lint

* Add callback decorator

* Remove state_str, fix lint

homeassistant/components/zwave/__init__.py

@@ -26,6 +26,7 @@ from homeassistant.helpers.dispatcher import (
 
 from . import const
 from . import config_flow  # noqa pylint: disable=unused-import
+from . import websocket_api as wsapi
 from .const import (
     CONF_AUTOHEAL, CONF_DEBUG, CONF_POLLING_INTERVAL,
     CONF_USB_STICK_PATH, CONF_CONFIG_PATH, CONF_NETWORK_KEY,
@@ -301,6 +302,8 @@ async def async_setup_entry(hass, config_entry):
 
     registry = await async_get_registry(hass)
 
+    wsapi.async_load_websocket_api(hass)
+
     if use_debug:  # pragma: no cover
         def log_all(signal, value=None):
             """Log all the signals."""

homeassistant/components/zwave/websocket_api.py

@@ -0,0 +1,33 @@
+"""Web socket API for Z-Wave."""
+
+import logging
+
+import voluptuous as vol
+
+from homeassistant.components import websocket_api
+from homeassistant.core import callback
+
+from .const import DATA_NETWORK
+
+_LOGGER = logging.getLogger(__name__)
+
+TYPE = 'type'
+ID = 'id'
+
+
+@websocket_api.require_admin
+@websocket_api.websocket_command({
+    vol.Required(TYPE): 'zwave/network_status'
+})
+def websocket_network_status(hass, connection, msg):
+    """Get Z-Wave network status."""
+    network = hass.data[DATA_NETWORK]
+    connection.send_result(msg[ID], {
+        'state': network.state,
+    })
+
+
+@callback
+def async_load_websocket_api(hass):
+    """Set up the web socket API."""
+    websocket_api.async_register_command(hass, websocket_network_status)