37 lines
911 B
Python
37 lines
911 B
Python
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"""
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homeassistant.components.automation.state
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Offers state listening automation rules.
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"""
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import logging
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from homeassistant.const import MATCH_ALL
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CONF_ENTITY_ID = "state_entity_id"
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CONF_FROM = "state_from"
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CONF_TO = "state_to"
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def register(hass, config, action):
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""" Listen for state changes based on `config`. """
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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 configuration key %s", CONF_ENTITY_ID)
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return False
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from_state = config.get(CONF_FROM, MATCH_ALL)
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to_state = config.get(CONF_TO, MATCH_ALL)
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def state_automation_listener(entity, from_s, to_s):
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""" Listens for state changes and calls action. """
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action()
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hass.states.track_change(
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entity_id, state_automation_listener, from_state, to_state)
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return True
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