Clean up Surepetcare sensor (#52219)

Signed-off-by: Daniel Hjelseth Høyer <github@dahoiv.net>

homeassistant/components/surepetcare/sensor.py

@@ -2,7 +2,6 @@
 from __future__ import annotations
 
 import logging
-from typing import Any
 
 from surepy.entities import SurepyEntity
 from surepy.enums import EntityType
@@ -57,27 +56,41 @@ class SureBattery(SensorEntity):
         self._id = _id
         self._spc: SurePetcareAPI = spc
 
-        self._surepy_entity: SurepyEntity = self._spc.states[_id]
-        self._state: dict[str, Any] = {}
+        surepy_entity: SurepyEntity = self._spc.states[_id]
 
         self._attr_device_class = DEVICE_CLASS_BATTERY
-        self._attr_name = f"{self._surepy_entity.type.name.capitalize()} {self._surepy_entity.name.capitalize()} Battery Level"
+        self._attr_name = f"{surepy_entity.type.name.capitalize()} {surepy_entity.name.capitalize()} Battery Level"
         self._attr_unit_of_measurement = PERCENTAGE
         self._attr_unique_id = (
-            f"{self._surepy_entity.household_id}-{self._surepy_entity.id}-battery"
+            f"{surepy_entity.household_id}-{surepy_entity.id}-battery"
         )
 
-    @property
-    def available(self) -> bool:
-        """Return true if entity is available."""
-        return bool(self._state)
-
     @callback
     def _async_update(self) -> None:
         """Get the latest data and update the state."""
-        self._surepy_entity = self._spc.states[self._id]
-        self._state = self._surepy_entity.raw_data()["status"]
-        _LOGGER.debug("%s -> self._state: %s", self.name, self._state)
+        surepy_entity = self._spc.states[self._id]
+        state = surepy_entity.raw_data()["status"]
+
+        self._attr_available = bool(state)
+        try:
+            per_battery_voltage = state["battery"] / 4
+            voltage_diff = per_battery_voltage - SURE_BATT_VOLTAGE_LOW
+            self._attr_state = min(
+                int(voltage_diff / SURE_BATT_VOLTAGE_DIFF * 100), 100
+            )
+        except (KeyError, TypeError):
+            self._attr_state = None
+
+        if state:
+            voltage_per_battery = float(state["battery"]) / 4
+            self._attr_extra_state_attributes = {
+                ATTR_VOLTAGE: f"{float(state['battery']):.2f}",
+                f"{ATTR_VOLTAGE}_per_battery": f"{voltage_per_battery:.2f}",
+            }
+        else:
+            self._attr_extra_state_attributes = None
+        self.async_write_ha_state()
+        _LOGGER.debug("%s -> state: %s", self.name, state)
 
     async def async_added_to_hass(self) -> None:
         """Register callbacks."""
@@ -85,26 +98,3 @@ class SureBattery(SensorEntity):
             async_dispatcher_connect(self.hass, TOPIC_UPDATE, self._async_update)
         )
         self._async_update()
-
-    @property
-    def state(self) -> int | None:
-        """Return battery level in percent."""
-        try:
-            per_battery_voltage = self._state["battery"] / 4
-            voltage_diff = per_battery_voltage - SURE_BATT_VOLTAGE_LOW
-            return min(int(voltage_diff / SURE_BATT_VOLTAGE_DIFF * 100), 100)
-        except (KeyError, TypeError):
-            return None
-
-    @property
-    def extra_state_attributes(self) -> dict[str, Any] | None:
-        """Return state attributes."""
-        attributes = None
-        if self._state:
-            voltage_per_battery = float(self._state["battery"]) / 4
-            attributes = {
-                ATTR_VOLTAGE: f"{float(self._state['battery']):.2f}",
-                f"{ATTR_VOLTAGE}_per_battery": f"{voltage_per_battery:.2f}",
-            }
-
-        return attributes