binary_sensor.py

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"""The Flexit Nordic (BACnet) integration."""
 
from collections.abc import Callable
from dataclasses import dataclass
 
from flexit_bacnet import FlexitBACnet
 
from homeassistant.components.binary_sensor import (
    BinarySensorDeviceClass,
    BinarySensorEntity,
    BinarySensorEntityDescription,
)
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
from . import FlexitCoordinator
from .const import DOMAIN
from .entity import FlexitEntity
 
 
@dataclass(kw_only=True, frozen=True)
class FlexitBinarySensorEntityDescription(BinarySensorEntityDescription):
    """Describes a Flexit binary sensor entity."""
 
    value_fn: Callable[[FlexitBACnet], bool]
 
 
SENSOR_TYPES: tuple[FlexitBinarySensorEntityDescription, ...] = (
    FlexitBinarySensorEntityDescription(
        key="air_filter_polluted",
        device_class=BinarySensorDeviceClass.PROBLEM,
        translation_key="air_filter_polluted",
        value_fn=lambda data: data.air_filter_polluted,
    ),
)
 
 
async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up Flexit (bacnet) binary sensor from a config entry."""
    coordinator: FlexitCoordinator = hass.data[DOMAIN][config_entry.entry_id]
 
    async_add_entities(
        FlexitBinarySensor(coordinator, description) for description in SENSOR_TYPES
    )
 
 
class FlexitBinarySensor(FlexitEntity, BinarySensorEntity):
    """Representation of a Flexit binary Sensor."""
 
    entity_description: FlexitBinarySensorEntityDescription
 
    def __init__(
        self,
        coordinator: FlexitCoordinator,
        entity_description: FlexitBinarySensorEntityDescription,
    ) -> None:
        """Initialize Flexit (bacnet) sensor."""
        super().__init__(coordinator)
 
        self.entity_descriptionentity_description = entity_description
        self._attr_unique_id_attr_unique_id = (
            f"{coordinator.device.serial_number}-{entity_description.key}"
        )
 
    @property
    def is_on(self) -> bool:
        """Return value of binary sensor."""
        return self.entity_descriptionentity_description.value_fn(self.coordinator.data)