Add fjäråskupan binary_sensor (#54920)

* Add fjäråskupan binary_sensor

* Switch to entity description

* Type check constructor

.coveragerc

@@ -318,6 +318,7 @@ omit =
     homeassistant/components/fitbit/*
     homeassistant/components/fixer/sensor.py
     homeassistant/components/fjaraskupan/__init__.py
+    homeassistant/components/fjaraskupan/binary_sensor.py
     homeassistant/components/fjaraskupan/const.py
     homeassistant/components/fjaraskupan/fan.py
     homeassistant/components/fleetgo/device_tracker.py

homeassistant/components/fjaraskupan/__init__.py

@@ -23,7 +23,7 @@ from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 
 from .const import DISPATCH_DETECTION, DOMAIN
 
-PLATFORMS = ["fan"]
+PLATFORMS = ["binary_sensor", "fan"]
 
 _LOGGER = logging.getLogger(__name__)
 

homeassistant/components/fjaraskupan/binary_sensor.py

@@ -0,0 +1,95 @@
+"""Support for sensors."""
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Callable
+
+from fjaraskupan import Device, State
+
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_PROBLEM,
+    BinarySensorEntity,
+    BinarySensorEntityDescription,
+)
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity import DeviceInfo, Entity
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.update_coordinator import (
+    CoordinatorEntity,
+    DataUpdateCoordinator,
+)
+
+from . import DeviceState, async_setup_entry_platform
+
+
+@dataclass
+class EntityDescription(BinarySensorEntityDescription):
+    """Entity description."""
+
+    is_on: Callable = lambda _: False
+
+
+SENSORS = (
+    EntityDescription(
+        key="grease-filter",
+        name="Grease Filter",
+        device_class=DEVICE_CLASS_PROBLEM,
+        is_on=lambda state: state.grease_filter_full,
+    ),
+    EntityDescription(
+        key="carbon-filter",
+        name="Carbon Filter",
+        device_class=DEVICE_CLASS_PROBLEM,
+        is_on=lambda state: state.carbon_filter_full,
+    ),
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up sensors dynamically through discovery."""
+
+    def _constructor(device_state: DeviceState) -> list[Entity]:
+        return [
+            BinarySensor(
+                device_state.coordinator,
+                device_state.device,
+                device_state.device_info,
+                entity_description,
+            )
+            for entity_description in SENSORS
+        ]
+
+    async_setup_entry_platform(hass, config_entry, async_add_entities, _constructor)
+
+
+class BinarySensor(CoordinatorEntity[State], BinarySensorEntity):
+    """Grease filter sensor."""
+
+    entity_description: EntityDescription
+
+    def __init__(
+        self,
+        coordinator: DataUpdateCoordinator[State],
+        device: Device,
+        device_info: DeviceInfo,
+        entity_description: EntityDescription,
+    ) -> None:
+        """Init sensor."""
+        super().__init__(coordinator)
+        self.entity_description = entity_description
+
+        self._attr_unique_id = f"{device.address}-{entity_description.key}"
+        self._attr_device_info = device_info
+        self._attr_name = f"{device_info['name']} {entity_description.name}"
+
+    @property
+    def is_on(self) -> bool | None:
+        """Return true if the binary sensor is on."""
+        if data := self.coordinator.data:
+            return self.entity_description.is_on(data)
+        return None