Add state dependent icons to moon sensor (#28743)

* have sensor.moon use state dependent icons

Material design icons have icons for all sensor.states, let's use these natively in the component.
Based on the Season icons, tried to change accordingly.

* Update sensor.py

added state constants

* Update sensor.py

fixed missing mdi:

* order of constants. moon icons and use self.state

change order of constants to alphabetical, changed order in Moon_icons to alphabetical, used self.state for icon lookup

* replace the strings

 replace the strings for self.state with the constants

* removed quotes

* removed spaces, empty line

* local Black

* Sort imports and move import to file header


Co-authored-by: Fabian Affolter <mail@fabian-affolter.ch>

homeassistant/components/moon/sensor.py

@@ -1,19 +1,38 @@
 """Support for tracking the moon phases."""
 import logging
 
+from astral import Astral
 import voluptuous as vol
 
 from homeassistant.components.sensor import PLATFORM_SCHEMA
 from homeassistant.const import CONF_NAME
-import homeassistant.util.dt as dt_util
-from homeassistant.helpers.entity import Entity
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity import Entity
+import homeassistant.util.dt as dt_util
 
 _LOGGER = logging.getLogger(__name__)
 
 DEFAULT_NAME = "Moon"
 
-ICON = "mdi:brightness-3"
+STATE_FIRST_QUARTER = "first_quarter"
+STATE_FULL_MOON = "full_moon"
+STATE_LAST_QUARTER = "last_quarter"
+STATE_NEW_MOON = "new_moon"
+STATE_WANING_CRESCENT = "waning_crescent"
+STATE_WANING_GIBBOUS = "waning_gibbous"
+STATE_WAXING_GIBBOUS = "waxing_gibbous"
+STATE_WAXING_CRESCENT = "waxing_crescent"
+
+MOON_ICONS = {
+    STATE_FIRST_QUARTER: "mdi:moon-first-quarter",
+    STATE_FULL_MOON: "mdi:moon-full",
+    STATE_LAST_QUARTER: "mdi:moon-last-quarter",
+    STATE_NEW_MOON: "mdi:moon-new",
+    STATE_WANING_CRESCENT: "mdi:moon-waning-crescent",
+    STATE_WANING_GIBBOUS: "mdi:moon-waning-gibbous",
+    STATE_WAXING_CRESCENT: "mdi:moon-waxing-crescent",
+    STATE_WAXING_GIBBOUS: "mdi:moon-waxing-gibbous",
+}
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string}
@@ -31,7 +50,7 @@ class MoonSensor(Entity):
     """Representation of a Moon sensor."""
 
     def __init__(self, name):
-        """Initialize the sensor."""
+        """Initialize the moon sensor."""
         self._name = name
         self._state = None
 
@@ -44,29 +63,27 @@ class MoonSensor(Entity):
     def state(self):
         """Return the state of the device."""
         if self._state == 0:
-            return "new_moon"
+            return STATE_NEW_MOON
         if self._state < 7:
-            return "waxing_crescent"
+            return STATE_WAXING_CRESCENT
         if self._state == 7:
-            return "first_quarter"
+            return STATE_FIRST_QUARTER
         if self._state < 14:
-            return "waxing_gibbous"
+            return STATE_WAXING_GIBBOUS
         if self._state == 14:
-            return "full_moon"
+            return STATE_FULL_MOON
         if self._state < 21:
-            return "waning_gibbous"
+            return STATE_WANING_GIBBOUS
         if self._state == 21:
-            return "last_quarter"
+            return STATE_LAST_QUARTER
-        return "waning_crescent"
+        return STATE_WANING_CRESCENT
 
     @property
     def icon(self):
         """Icon to use in the frontend, if any."""
-        return ICON
+        return MOON_ICONS.get(self.state, "mdi:brightness-3")
 
     async def async_update(self):
         """Get the time and updates the states."""
-        from astral import Astral
-
         today = dt_util.as_local(dt_util.utcnow()).date()
         self._state = Astral().moon_phase(today)