binary_sensor.py

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"""Binary sensor platform for Acaia scales."""
 
from collections.abc import Callable
from dataclasses import dataclass
 
from aioacaia.acaiascale import AcaiaScale
 
from homeassistant.components.binary_sensor import (
    BinarySensorDeviceClass,
    BinarySensorEntity,
    BinarySensorEntityDescription,
)
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
from .coordinator import AcaiaConfigEntry
from .entity import AcaiaEntity
 
 
@dataclass(kw_only=True, frozen=True)
class AcaiaBinarySensorEntityDescription(BinarySensorEntityDescription):
    """Description for Acaia binary sensor entities."""
 
    is_on_fn: Callable[[AcaiaScale], bool]
 
 
BINARY_SENSORS: tuple[AcaiaBinarySensorEntityDescription, ...] = (
    AcaiaBinarySensorEntityDescription(
        key="timer_running",
        translation_key="timer_running",
        device_class=BinarySensorDeviceClass.RUNNING,
        is_on_fn=lambda scale: scale.timer_running,
    ),
)
 
 
async def async_setup_entry(
    hass: HomeAssistant,
    entry: AcaiaConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up binary sensors."""
 
    coordinator = entry.runtime_data
    async_add_entities(
        AcaiaBinarySensor(coordinator, description) for description in BINARY_SENSORS
    )
 
 
class AcaiaBinarySensor(AcaiaEntity, BinarySensorEntity):
    """Representation of an Acaia binary sensor."""
 
    entity_description: AcaiaBinarySensorEntityDescription
 
    @property
    def is_on(self) -> bool:
        """Return true if the binary sensor is on."""
        return self.entity_descriptionentity_description.is_on_fn(self._scale_scale_scale)