130 lines
4.2 KiB
Python
130 lines
4.2 KiB
Python
"""
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Offer state listening automation rules.
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For more details about this automation rule, please refer to the documentation
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at https://home-assistant.io/components/automation/#state-trigger
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"""
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import logging
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from datetime import timedelta
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import homeassistant.util.dt as dt_util
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from homeassistant.const import (
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EVENT_STATE_CHANGED, EVENT_TIME_CHANGED, MATCH_ALL)
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from homeassistant.components.automation.time import (
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CONF_HOURS, CONF_MINUTES, CONF_SECONDS)
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from homeassistant.helpers.event import track_state_change, track_point_in_time
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CONF_ENTITY_ID = "entity_id"
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CONF_FROM = "from"
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CONF_TO = "to"
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CONF_STATE = "state"
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CONF_FOR = "for"
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def get_time_config(config):
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"""Helper function to extract the time specified in the configuration."""
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if CONF_FOR not in config:
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return None
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hours = config[CONF_FOR].get(CONF_HOURS)
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minutes = config[CONF_FOR].get(CONF_MINUTES)
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seconds = config[CONF_FOR].get(CONF_SECONDS)
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if hours is None and minutes is None and seconds is None:
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logging.getLogger(__name__).error(
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"Received invalid value for '%s': %s",
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config[CONF_FOR], CONF_FOR)
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return None
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if config.get(CONF_TO) is None and config.get(CONF_STATE) is None:
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logging.getLogger(__name__).error(
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"For: requires a to: value'%s': %s",
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config[CONF_FOR], CONF_FOR)
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return None
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return timedelta(hours=(hours or 0.0),
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minutes=(minutes or 0.0),
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seconds=(seconds or 0.0))
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def trigger(hass, config, action):
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"""Listen for state changes based on configuration."""
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entity_id = config.get(CONF_ENTITY_ID)
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if entity_id is None:
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logging.getLogger(__name__).error(
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"Missing trigger configuration key %s", CONF_ENTITY_ID)
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return None
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from_state = config.get(CONF_FROM, MATCH_ALL)
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to_state = config.get(CONF_TO) or config.get(CONF_STATE) or MATCH_ALL
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time_delta = get_time_config(config)
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if isinstance(from_state, bool) or isinstance(to_state, bool):
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logging.getLogger(__name__).error(
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'Config error. Surround to/from values with quotes.')
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return None
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if CONF_FOR in config and time_delta is None:
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return None
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def state_automation_listener(entity, from_s, to_s):
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"""Listen for state changes and calls action."""
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def state_for_listener(now):
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"""Fire on state changes after a delay and calls action."""
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hass.bus.remove_listener(
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EVENT_STATE_CHANGED, for_state_listener)
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action()
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def state_for_cancel_listener(entity, inner_from_s, inner_to_s):
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"""Fire on changes and cancel for listener if changed."""
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if inner_to_s == to_s:
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return
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hass.bus.remove_listener(EVENT_TIME_CHANGED, for_time_listener)
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hass.bus.remove_listener(
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EVENT_STATE_CHANGED, for_state_listener)
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if time_delta is not None:
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target_tm = dt_util.utcnow() + time_delta
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for_time_listener = track_point_in_time(
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hass, state_for_listener, target_tm)
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for_state_listener = track_state_change(
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hass, entity_id, state_for_cancel_listener,
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MATCH_ALL, MATCH_ALL)
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else:
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action()
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track_state_change(
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hass, entity_id, state_automation_listener, from_state, to_state)
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return True
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def if_action(hass, config):
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"""Wrap action method with state based condition."""
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entity_id = config.get(CONF_ENTITY_ID)
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state = config.get(CONF_STATE)
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if entity_id is None or state is None:
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logging.getLogger(__name__).error(
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"Missing if-condition configuration key %s or %s", CONF_ENTITY_ID,
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CONF_STATE)
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return None
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time_delta = get_time_config(config)
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if CONF_FOR in config and time_delta is None:
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return None
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state = str(state)
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def if_state():
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"""Test if condition."""
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is_state = hass.states.is_state(entity_id, state)
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return (time_delta is None and is_state or
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time_delta is not None and
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dt_util.utcnow() - time_delta >
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hass.states.get(entity_id).last_changed)
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return if_state
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