144 lines
4.4 KiB
Python
144 lines
4.4 KiB
Python
"""
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Support for switches which integrates with other components.
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For more details about this platform, please refer to the documentation at
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https://home-assistant.io/components/switch.template/
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"""
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import asyncio
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import logging
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import voluptuous as vol
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from homeassistant.core import callback
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from homeassistant.components.switch import (
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ENTITY_ID_FORMAT, SwitchDevice, PLATFORM_SCHEMA)
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from homeassistant.const import (
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ATTR_FRIENDLY_NAME, CONF_VALUE_TEMPLATE, STATE_OFF, STATE_ON,
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ATTR_ENTITY_ID, CONF_SWITCHES)
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from homeassistant.exceptions import TemplateError
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from homeassistant.helpers.entity import generate_entity_id
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from homeassistant.helpers.event import track_state_change
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from homeassistant.helpers.script import Script
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import homeassistant.helpers.config_validation as cv
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_LOGGER = logging.getLogger(__name__)
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_VALID_STATES = [STATE_ON, STATE_OFF, 'true', 'false']
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ON_ACTION = 'turn_on'
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OFF_ACTION = 'turn_off'
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SWITCH_SCHEMA = vol.Schema({
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vol.Required(CONF_VALUE_TEMPLATE): cv.template,
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vol.Required(ON_ACTION): cv.SCRIPT_SCHEMA,
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vol.Required(OFF_ACTION): cv.SCRIPT_SCHEMA,
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vol.Optional(ATTR_FRIENDLY_NAME): cv.string,
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vol.Optional(ATTR_ENTITY_ID): cv.entity_ids
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})
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
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vol.Required(CONF_SWITCHES): vol.Schema({cv.slug: SWITCH_SCHEMA}),
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})
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# pylint: disable=unused-argument
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def setup_platform(hass, config, add_devices, discovery_info=None):
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"""Setup the Template switch."""
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switches = []
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for device, device_config in config[CONF_SWITCHES].items():
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friendly_name = device_config.get(ATTR_FRIENDLY_NAME, device)
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state_template = device_config[CONF_VALUE_TEMPLATE]
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on_action = device_config[ON_ACTION]
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off_action = device_config[OFF_ACTION]
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entity_ids = (device_config.get(ATTR_ENTITY_ID) or
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state_template.extract_entities())
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switches.append(
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SwitchTemplate(
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hass,
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device,
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friendly_name,
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state_template,
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on_action,
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off_action,
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entity_ids)
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)
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if not switches:
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_LOGGER.error("No switches added")
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return False
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add_devices(switches)
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return True
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class SwitchTemplate(SwitchDevice):
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"""Representation of a Template switch."""
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# pylint: disable=too-many-arguments
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def __init__(self, hass, device_id, friendly_name, state_template,
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on_action, off_action, entity_ids):
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"""Initialize the Template switch."""
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self.hass = hass
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self.entity_id = generate_entity_id(ENTITY_ID_FORMAT, device_id,
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hass=hass)
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self._name = friendly_name
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self._template = state_template
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state_template.hass = hass
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self._on_script = Script(hass, on_action)
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self._off_script = Script(hass, off_action)
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self._state = False
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self.update()
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@callback
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def template_switch_state_listener(entity, old_state, new_state):
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"""Called when the target device changes state."""
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hass.loop.create_task(self.async_update_ha_state(True))
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track_state_change(hass, entity_ids, template_switch_state_listener)
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@property
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def name(self):
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"""Return the name of the switch."""
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return self._name
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@property
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def is_on(self):
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"""Return true if device is on."""
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return self._state
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@property
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def should_poll(self):
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"""No polling needed."""
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return False
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@property
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def available(self):
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"""If switch is available."""
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return self._state is not None
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def turn_on(self, **kwargs):
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"""Fire the on action."""
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self._on_script.run()
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def turn_off(self, **kwargs):
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"""Fire the off action."""
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self._off_script.run()
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@asyncio.coroutine
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def async_update(self):
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"""Update the state from the template."""
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try:
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state = self._template.async_render().lower()
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if state in _VALID_STATES:
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self._state = state in ('true', STATE_ON)
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else:
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_LOGGER.error(
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'Received invalid switch is_on state: %s. Expected: %s',
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state, ', '.join(_VALID_STATES))
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self._state = None
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except TemplateError as ex:
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_LOGGER.error(ex)
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self._state = None
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