Code cleanup of velux scene (#12390)

* Code cleanup of velux scene

* fixed review comments

* fixed review comments

homeassistant/components/scene/velux.py

@@ -4,6 +4,8 @@ Support for VELUX scenes.
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/scene.velux/
 """
+import asyncio
+
 from homeassistant.components.scene import Scene
 from homeassistant.components.velux import _LOGGER, DATA_VELUX
 
@@ -11,26 +13,22 @@ from homeassistant.components.velux import _LOGGER, DATA_VELUX
 DEPENDENCIES = ['velux']
 
 
-def setup_platform(hass, config, add_devices, discovery_info=None):
+@asyncio.coroutine
+def async_setup_platform(hass, config, async_add_devices,
+                         discovery_info=None):
     """Set up the scenes for velux platform."""
-    if DATA_VELUX not in hass.data \
-            or not hass.data[DATA_VELUX].initialized:
-        return False
-
     entities = []
     for scene in hass.data[DATA_VELUX].pyvlx.scenes:
-        entities.append(VeluxScene(hass, scene))
-    add_devices(entities)
-    return True
+        entities.append(VeluxScene(scene))
+    async_add_devices(entities)
 
 
 class VeluxScene(Scene):
     """Representation of a velux scene."""
 
-    def __init__(self, hass, scene):
+    def __init__(self, scene):
         """Init velux scene."""
         _LOGGER.info("Adding VELUX scene: %s", scene)
-        self.hass = hass
         self.scene = scene
 
     @property
@@ -38,16 +36,7 @@ class VeluxScene(Scene):
         """Return the name of the scene."""
         return self.scene.name
 
-    @property
-    def should_poll(self):
-        """Return that polling is not necessary."""
-        return False
-
-    @property
-    def is_on(self):
-        """There is no way of detecting if a scene is active (yet)."""
-        return False
-
-    def activate(self):
+    @asyncio.coroutine
+    def async_activate(self):
         """Activate the scene."""
-        self.hass.async_add_job(self.scene.run())
+        yield from self.scene.run()

homeassistant/components/velux.py

@@ -52,16 +52,13 @@ class VeluxModule:
     def __init__(self, hass, config):
         """Initialize for velux component."""
         from pyvlx import PyVLX
-        self.initialized = False
         host = config[DOMAIN].get(CONF_HOST)
         password = config[DOMAIN].get(CONF_PASSWORD)
         self.pyvlx = PyVLX(
             host=host,
             password=password)
-        self.hass = hass
 
     @asyncio.coroutine
     def async_start(self):
         """Start velux component."""
         yield from self.pyvlx.load_scenes()
-        self.initialized = True