core/homeassistant/helpers/state.py

59 lines
1.6 KiB
Python

"""
homeassistant.helpers.state
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Helpers that help with state related things.
"""
import logging
from datetime import datetime
from homeassistant import State
from homeassistant.const import (
STATE_ON, STATE_OFF, SERVICE_TURN_ON, SERVICE_TURN_OFF, ATTR_ENTITY_ID)
_LOGGER = logging.getLogger(__name__)
# pylint: disable=too-few-public-methods, attribute-defined-outside-init
class TrackStates(object):
"""
Records the time when the with-block is entered. Will add all states
that have changed since the start time to the return list when with-block
is exited.
"""
def __init__(self, hass):
self.hass = hass
self.states = []
def __enter__(self):
self.now = datetime.now()
return self.states
def __exit__(self, exc_type, exc_value, traceback):
self.states.extend(self.hass.states.get_since(self.now))
def reproduce_state(hass, states, blocking=False):
""" Takes in a state and will try to have the entity reproduce it. """
if isinstance(states, State):
states = [states]
for state in states:
current_state = hass.states.get(state.entity_id)
if current_state is None:
continue
if state.state == STATE_ON:
service = SERVICE_TURN_ON
elif state.state == STATE_OFF:
service = SERVICE_TURN_OFF
else:
_LOGGER.warning("Unable to reproduce state for %s", state)
continue
service_data = dict(state.attributes)
service_data[ATTR_ENTITY_ID] = state.entity_id
hass.services.call(state.domain, service, service_data, blocking)