ha-linak-desk/custom_components/linak_desk/sensor.py

"""Linak Sensors"""

from __future__ import annotations

from dataclasses import dataclass
from typing import Any
from collections.abc import Callable

from homeassistant.components.sensor import (
    SensorEntity,
    SensorEntityDescription,
    SensorDeviceClass,
)
from homeassistant.components.sensor import SensorStateClass
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import UnitOfSpeed, UnitOfLength
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.typing import StateType

from .model import LinakBluetoothEntity, LinakDataUpdateCoordinator
from .api import Device
from .const import DOMAIN


@dataclass
class LinakSensorEntityDescriptionMixin:
    """Mixin for required keys"""

    state_fn: Callable[[Device], Any]


@dataclass
class LinakSensorEntityDescription(
    SensorEntityDescription, LinakSensorEntityDescriptionMixin
):
    """Describes Linak sensor entity"""



DEVICE_ENTITY_DESCRIPTIONS: list[LinakSensorEntityDescription] = [
    LinakSensorEntityDescription(
        device_class=SensorDeviceClass.DISTANCE,
        key="height",
        name="Height",
        native_unit_of_measurement=UnitOfLength.MILLIMETERS,
        state_class=SensorStateClass.MEASUREMENT,
        state_fn=lambda device: device.height,
    ),
    LinakSensorEntityDescription(
        device_class=SensorDeviceClass.SPEED,
        key="speed",
        name="Speed",
        native_unit_of_measurement=UnitOfSpeed.METERS_PER_SECOND,
        state_class=SensorStateClass.MEASUREMENT,
        state_fn=lambda device: device.speed / 1000,
    ),
]


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up the sensor platform"""

    coordinator: LinakDataUpdateCoordinator = hass.data[DOMAIN][config_entry.entry_id]

    async_add_entities(
        LinakSensorEntity(coordinator, description)
        for description in DEVICE_ENTITY_DESCRIPTIONS
    )


class LinakSensorEntity(LinakBluetoothEntity, SensorEntity):
    """Linak desk sensor"""

    entity_description: LinakSensorEntityDescription

    def __init__(
        self,
        coordinator: LinakDataUpdateCoordinator,
        entity_description: LinakSensorEntityDescription,
    ) -> None:
        super().__init__(coordinator)

        self._attr_unique_id = f"{self._device.mac}-{entity_description.key}"

        self.entity_description = entity_description

    @property
    def native_value(self) -> StateType:
        return self.entity_description.state_fn(self._device)