Updated ISY component to not overwrite state_attributes. (#5433)

* Updated ISY component to not overwrite state_attributes.

The ISY component included an ISYDevice base class that is used by all
of the isy994 platforms. This still overwrote the state_attributes
property instead of the more appropriate device_state_attributes
property. This was also repeated in the isy994 light platform. Both of
these were addressed. This also fixes issue #5428.

* Removed custom state attributes from ISY lights.

The brightness attribute need not be manually reported by the isy994
light platform.

* Removed ISY Node cleanup.

The ISY entities don’t really need to unsubscribe themselves while hass
is shutting down. Because these updates are not sent in a thread, there
is no negative impact from shutting down without unsubscribing. This
greatly speeds up hass shutdown.

* Removed unused attribute from isy994 light platform.

* Cleaned up ISY994 light entity class.

1) Removed the state property. This property is set in the Entity base
class and shouldn’t be overridden here.
2) Set the brightness property. This is the proper way of setting the
brightness for the Light base class.
3) Removed properties that are now unused because of these changes.

homeassistant/components/isy994.py

@@ -228,10 +228,6 @@ class ISYDevice(Entity):
         self._change_handler = self._node.status.subscribe('changed',
                                                            self.on_update)
 
-    def __del__(self) -> None:
-        """Cleanup the subscriptions."""
-        self._change_handler.unsubscribe()
-
     # pylint: disable=unused-argument
     def on_update(self, event: object) -> None:
         """Handle the update event from the ISY994 Node."""
@@ -272,7 +268,7 @@ class ISYDevice(Entity):
         return self._node.status._val
 
     @property
-    def state_attributes(self) -> Dict:
+    def device_state_attributes(self) -> Dict:
         """Get the state attributes for the device."""
         attr = {}
         if hasattr(self._node, 'aux_properties'):

homeassistant/components/light/isy994.py

@@ -8,18 +8,13 @@ import logging
 from typing import Callable
 
 from homeassistant.components.light import (
-    Light, SUPPORT_BRIGHTNESS, ATTR_BRIGHTNESS)
+    Light, SUPPORT_BRIGHTNESS)
 import homeassistant.components.isy994 as isy
-from homeassistant.const import STATE_ON, STATE_OFF, STATE_UNKNOWN
+from homeassistant.const import STATE_ON, STATE_OFF
 from homeassistant.helpers.typing import ConfigType
 
 _LOGGER = logging.getLogger(__name__)
 
-VALUE_TO_STATE = {
-    False: STATE_OFF,
-    True: STATE_ON,
-}
-
 UOM = ['2', '51', '78']
 STATES = [STATE_OFF, STATE_ON, 'true', 'false', '%']
 
@@ -52,12 +47,12 @@ class ISYLightDevice(isy.ISYDevice, Light):
     @property
     def is_on(self) -> bool:
         """Get whether the ISY994 light is on."""
-        return self.state == STATE_ON
+        return self.value > 0
 
     @property
-    def state(self) -> str:
-        """Get the state of the ISY994 light."""
-        return VALUE_TO_STATE.get(bool(self.value), STATE_UNKNOWN)
+    def brightness(self) -> float:
+        """Get the brightness of the ISY994 light."""
+        return self.value
 
     def turn_off(self, **kwargs) -> None:
         """Send the turn off command to the ISY994 light device."""
@@ -69,11 +64,6 @@ class ISYLightDevice(isy.ISYDevice, Light):
         if not self._node.on(val=brightness):
             _LOGGER.debug('Unable to turn on light.')
 
-    @property
-    def state_attributes(self):
-        """Flag supported attributes."""
-        return {ATTR_BRIGHTNESS: self.value}
-
     @property
     def supported_features(self):
         """Flag supported features."""