117 lines
3.3 KiB
Python
117 lines
3.3 KiB
Python
"""Offer template automation rules."""
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import logging
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import voluptuous as vol
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from homeassistant import exceptions
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from homeassistant.const import CONF_FOR, CONF_PLATFORM, CONF_VALUE_TEMPLATE
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from homeassistant.core import callback
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from homeassistant.helpers import config_validation as cv, template
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from homeassistant.helpers.event import (
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TrackTemplate,
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async_call_later,
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async_track_template_result,
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)
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from homeassistant.helpers.template import result_as_boolean
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# mypy: allow-untyped-defs, no-check-untyped-defs
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_LOGGER = logging.getLogger(__name__)
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TRIGGER_SCHEMA = IF_ACTION_SCHEMA = vol.Schema(
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{
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vol.Required(CONF_PLATFORM): "template",
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vol.Required(CONF_VALUE_TEMPLATE): cv.template,
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vol.Optional(CONF_FOR): cv.positive_time_period_template,
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}
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)
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async def async_attach_trigger(
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hass, config, action, automation_info, *, platform_type="template"
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):
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"""Listen for state changes based on configuration."""
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value_template = config.get(CONF_VALUE_TEMPLATE)
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value_template.hass = hass
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time_delta = config.get(CONF_FOR)
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template.attach(hass, time_delta)
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delay_cancel = None
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@callback
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def template_listener(event, updates):
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"""Listen for state changes and calls action."""
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nonlocal delay_cancel
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result = updates.pop().result
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if delay_cancel:
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# pylint: disable=not-callable
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delay_cancel()
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delay_cancel = None
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if not result_as_boolean(result):
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return
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entity_id = event.data.get("entity_id")
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from_s = event.data.get("old_state")
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to_s = event.data.get("new_state")
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@callback
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def call_action(*_):
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"""Call action with right context."""
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hass.async_run_job(
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action,
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{
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"trigger": {
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"platform": "template",
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"entity_id": entity_id,
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"from_state": from_s,
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"to_state": to_s,
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"for": time_delta if not time_delta else period,
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"description": f"{entity_id} via template",
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}
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},
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(to_s.context if to_s else None),
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)
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if not time_delta:
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call_action()
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return
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variables = {
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"trigger": {
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"platform": platform_type,
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"entity_id": entity_id,
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"from_state": from_s,
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"to_state": to_s,
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}
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}
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try:
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period = cv.positive_time_period(
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template.render_complex(time_delta, variables)
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)
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except (exceptions.TemplateError, vol.Invalid) as ex:
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_LOGGER.error(
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"Error rendering '%s' for template: %s", automation_info["name"], ex
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)
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return
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delay_cancel = async_call_later(hass, period.seconds, call_action)
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info = async_track_template_result(
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hass,
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[TrackTemplate(value_template, automation_info["variables"])],
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template_listener,
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)
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unsub = info.async_remove
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@callback
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def async_remove():
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"""Remove state listeners async."""
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unsub()
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if delay_cancel:
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# pylint: disable=not-callable
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delay_cancel()
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return async_remove
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