Add Shelly totalWorkTime as Lamp life (Shelly Air) (#43112)

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>

homeassistant/components/shelly/const.py

@@ -19,3 +19,6 @@ SLEEP_PERIOD_MULTIPLIER = 1.2
 
 # Multiplier used to calculate the "update_interval" for non-sleeping devices.
 UPDATE_PERIOD_MULTIPLIER = 2.2
+
+# Shelly Air - Maximum work hours before lamp replacement
+SHAIR_MAX_WORK_HOURS = 9000

homeassistant/components/shelly/entity.py

@@ -119,6 +119,7 @@ class BlockAttributeDescription:
 
     name: str
     # Callable = lambda attr_info: unit
+    icon: Optional[str] = None
     unit: Union[None, str, Callable[[dict], str]] = None
     value: Callable[[Any], Any] = lambda val: val
     device_class: Optional[str] = None
@@ -254,6 +255,11 @@ class ShellyBlockAttributeEntity(ShellyBlockEntity, entity.Entity):
         """Device class of sensor."""
         return self.description.device_class
 
+    @property
+    def icon(self):
+        """Icon of sensor."""
+        return self.description.icon
+
     @property
     def available(self):
         """Available."""

homeassistant/components/shelly/sensor.py

@@ -12,6 +12,7 @@ from homeassistant.const import (
     VOLT,
 )
 
+from .const import SHAIR_MAX_WORK_HOURS
 from .entity import (
     BlockAttributeDescription,
     RestAttributeDescription,
@@ -144,6 +145,15 @@ SENSORS = {
         device_class=sensor.DEVICE_CLASS_ILLUMINANCE,
     ),
     ("sensor", "tilt"): BlockAttributeDescription(name="tilt", unit=DEGREE),
+    ("relay", "totalWorkTime"): BlockAttributeDescription(
+        name="Lamp life",
+        unit=PERCENTAGE,
+        icon="mdi:progress-wrench",
+        value=lambda value: round(100 - (value / 3600 / SHAIR_MAX_WORK_HOURS), 1),
+        device_state_attributes=lambda block: {
+            "Operational hours": round(block.totalWorkTime / 3600, 1)
+        },
+    ),
 }
 
 REST_SENSORS = {