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mirror of https://github.com/home-assistant/core synced 2024-09-03 08:14:07 +02:00
ha-core/homeassistant/components/switch/light.py
2022-04-23 10:26:35 -10:00

114 lines
3.5 KiB
Python

"""Light support for switch entities."""
from __future__ import annotations
from typing import Any
import voluptuous as vol
from homeassistant.components.light import PLATFORM_SCHEMA, ColorMode, LightEntity
from homeassistant.const import (
ATTR_ENTITY_ID,
CONF_ENTITY_ID,
CONF_NAME,
SERVICE_TURN_OFF,
SERVICE_TURN_ON,
STATE_ON,
STATE_UNAVAILABLE,
)
from homeassistant.core import Event, HomeAssistant, callback
from homeassistant.helpers import entity_registry as er
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.event import async_track_state_change_event
from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
from .const import DOMAIN as SWITCH_DOMAIN
DEFAULT_NAME = "Light Switch"
PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
{
vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
vol.Required(CONF_ENTITY_ID): cv.entity_domain(SWITCH_DOMAIN),
}
)
async def async_setup_platform(
hass: HomeAssistant,
config: ConfigType,
async_add_entities: AddEntitiesCallback,
discovery_info: DiscoveryInfoType | None = None,
) -> None:
"""Initialize Light Switch platform."""
registry = er.async_get(hass)
wrapped_switch = registry.async_get(config[CONF_ENTITY_ID])
unique_id = wrapped_switch.unique_id if wrapped_switch else None
async_add_entities(
[
LightSwitch(
config[CONF_NAME],
config[CONF_ENTITY_ID],
unique_id,
)
]
)
class LightSwitch(LightEntity):
"""Represents a Switch as a Light."""
_attr_color_mode = ColorMode.ONOFF
_attr_should_poll = False
_attr_supported_color_modes = {ColorMode.ONOFF}
def __init__(self, name: str, switch_entity_id: str, unique_id: str | None) -> None:
"""Initialize Light Switch."""
self._attr_name = name
self._attr_unique_id = unique_id
self._switch_entity_id = switch_entity_id
async def async_turn_on(self, **kwargs: Any) -> None:
"""Forward the turn_on command to the switch in this light switch."""
await self.hass.services.async_call(
SWITCH_DOMAIN,
SERVICE_TURN_ON,
{ATTR_ENTITY_ID: self._switch_entity_id},
blocking=True,
context=self._context,
)
async def async_turn_off(self, **kwargs: Any) -> None:
"""Forward the turn_off command to the switch in this light switch."""
await self.hass.services.async_call(
SWITCH_DOMAIN,
SERVICE_TURN_OFF,
{ATTR_ENTITY_ID: self._switch_entity_id},
blocking=True,
context=self._context,
)
async def async_added_to_hass(self) -> None:
"""Register callbacks."""
@callback
def async_state_changed_listener(event: Event | None = None) -> None:
"""Handle child updates."""
if (
state := self.hass.states.get(self._switch_entity_id)
) is None or state.state == STATE_UNAVAILABLE:
self._attr_available = False
return
self._attr_available = True
self._attr_is_on = state.state == STATE_ON
self.async_write_ha_state()
self.async_on_remove(
async_track_state_change_event(
self.hass, [self._switch_entity_id], async_state_changed_listener
)
)
# Call once on adding
async_state_changed_listener()