127 lines
4.0 KiB
Python
127 lines
4.0 KiB
Python
"""Light support for switch entities."""
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import logging
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from typing import cast, Callable, Dict, Optional, Sequence
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import voluptuous as vol
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from homeassistant.components import switch
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from homeassistant.const import (
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ATTR_ENTITY_ID,
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CONF_ENTITY_ID,
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CONF_NAME,
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STATE_ON,
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STATE_UNAVAILABLE,
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)
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from homeassistant.core import CALLBACK_TYPE, State, callback
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import homeassistant.helpers.config_validation as cv
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from homeassistant.helpers.entity import Entity
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from homeassistant.helpers.event import async_track_state_change
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from homeassistant.helpers.typing import ConfigType, HomeAssistantType
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from homeassistant.components.light import PLATFORM_SCHEMA, Light
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# mypy: allow-untyped-calls, allow-untyped-defs, no-check-untyped-defs
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_LOGGER = logging.getLogger(__name__)
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DEFAULT_NAME = "Light Switch"
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
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{
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vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
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vol.Required(CONF_ENTITY_ID): cv.entity_domain(switch.DOMAIN),
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}
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)
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async def async_setup_platform(
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hass: HomeAssistantType,
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config: ConfigType,
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async_add_entities: Callable[[Sequence[Entity], bool], None],
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discovery_info: Optional[Dict] = None,
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) -> None:
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"""Initialize Light Switch platform."""
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async_add_entities(
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[LightSwitch(cast(str, config.get(CONF_NAME)), config[CONF_ENTITY_ID])], True
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)
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class LightSwitch(Light):
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"""Represents a Switch as a Light."""
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def __init__(self, name: str, switch_entity_id: str) -> None:
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"""Initialize Light Switch."""
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self._name = name
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self._switch_entity_id = switch_entity_id
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self._is_on = False
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self._available = False
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self._async_unsub_state_changed: Optional[CALLBACK_TYPE] = None
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@property
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def name(self) -> str:
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"""Return the name of the entity."""
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return self._name
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@property
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def is_on(self) -> bool:
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"""Return true if light switch is on."""
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return self._is_on
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@property
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def available(self) -> bool:
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"""Return true if light switch is on."""
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return self._available
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@property
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def should_poll(self) -> bool:
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"""No polling needed for a light switch."""
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return False
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async def async_turn_on(self, **kwargs):
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"""Forward the turn_on command to the switch in this light switch."""
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data = {ATTR_ENTITY_ID: self._switch_entity_id}
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await self.hass.services.async_call(
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switch.DOMAIN, switch.SERVICE_TURN_ON, data, blocking=True
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)
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async def async_turn_off(self, **kwargs):
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"""Forward the turn_off command to the switch in this light switch."""
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data = {ATTR_ENTITY_ID: self._switch_entity_id}
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await self.hass.services.async_call(
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switch.DOMAIN, switch.SERVICE_TURN_OFF, data, blocking=True
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)
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async def async_update(self):
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"""Query the switch in this light switch and determine the state."""
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switch_state = self.hass.states.get(self._switch_entity_id)
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if switch_state is None:
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self._available = False
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return
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self._is_on = switch_state.state == STATE_ON
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self._available = switch_state.state != STATE_UNAVAILABLE
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async def async_added_to_hass(self) -> None:
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"""Register callbacks."""
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@callback
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def async_state_changed_listener(
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entity_id: str, old_state: State, new_state: State
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) -> None:
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"""Handle child updates."""
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self.async_schedule_update_ha_state(True)
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assert self.hass is not None
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self._async_unsub_state_changed = async_track_state_change(
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self.hass, self._switch_entity_id, async_state_changed_listener
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)
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async def async_will_remove_from_hass(self):
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"""Handle removal from Home Assistant."""
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if self._async_unsub_state_changed is not None:
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self._async_unsub_state_changed()
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self._async_unsub_state_changed = None
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self._available = False
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