134 lines
3.7 KiB
Python
134 lines
3.7 KiB
Python
"""Helpers that help with state related things."""
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import asyncio
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import datetime as dt
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import logging
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from collections import defaultdict
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from types import ModuleType, TracebackType
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from typing import Dict, Iterable, List, Optional, Type, Union
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from homeassistant.loader import bind_hass, async_get_integration, IntegrationNotFound
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import homeassistant.util.dt as dt_util
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from homeassistant.components.sun import STATE_ABOVE_HORIZON, STATE_BELOW_HORIZON
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from homeassistant.const import (
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STATE_CLOSED,
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STATE_HOME,
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STATE_LOCKED,
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STATE_NOT_HOME,
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STATE_OFF,
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STATE_ON,
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STATE_OPEN,
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STATE_UNKNOWN,
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STATE_UNLOCKED,
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)
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from homeassistant.core import Context, State
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from .typing import HomeAssistantType
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_LOGGER = logging.getLogger(__name__)
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class AsyncTrackStates:
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"""
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Record the time when the with-block is entered.
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Add all states that have changed since the start time to the return list
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when with-block is exited.
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Must be run within the event loop.
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"""
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def __init__(self, hass: HomeAssistantType) -> None:
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"""Initialize a TrackStates block."""
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self.hass = hass
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self.states: List[State] = []
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# pylint: disable=attribute-defined-outside-init
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def __enter__(self) -> List[State]:
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"""Record time from which to track changes."""
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self.now = dt_util.utcnow()
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return self.states
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def __exit__(
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self,
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exc_type: Optional[Type[BaseException]],
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exc_value: Optional[BaseException],
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traceback: Optional[TracebackType],
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) -> None:
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"""Add changes states to changes list."""
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self.states.extend(get_changed_since(self.hass.states.async_all(), self.now))
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def get_changed_since(
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states: Iterable[State], utc_point_in_time: dt.datetime
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) -> List[State]:
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"""Return list of states that have been changed since utc_point_in_time."""
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return [state for state in states if state.last_updated >= utc_point_in_time]
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@bind_hass
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async def async_reproduce_state(
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hass: HomeAssistantType,
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states: Union[State, Iterable[State]],
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blocking: bool = False,
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context: Optional[Context] = None,
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) -> None:
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"""Reproduce a list of states on multiple domains."""
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if isinstance(states, State):
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states = [states]
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to_call: Dict[str, List[State]] = defaultdict(list)
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for state in states:
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to_call[state.domain].append(state)
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async def worker(domain: str, states_by_domain: List[State]) -> None:
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try:
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integration = await async_get_integration(hass, domain)
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except IntegrationNotFound:
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_LOGGER.warning(
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"Trying to reproduce state for unknown integration: %s", domain
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)
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return
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try:
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platform: Optional[ModuleType] = integration.get_platform("reproduce_state")
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except ImportError:
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_LOGGER.warning("Integration %s does not support reproduce state", domain)
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return
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await platform.async_reproduce_states( # type: ignore
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hass, states_by_domain, context=context
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)
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if to_call:
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# run all domains in parallel
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await asyncio.gather(
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*(worker(domain, data) for domain, data in to_call.items())
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)
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def state_as_number(state: State) -> float:
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"""
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Try to coerce our state to a number.
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Raises ValueError if this is not possible.
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"""
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if state.state in (
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STATE_ON,
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STATE_LOCKED,
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STATE_ABOVE_HORIZON,
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STATE_OPEN,
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STATE_HOME,
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):
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return 1
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if state.state in (
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STATE_OFF,
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STATE_UNLOCKED,
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STATE_UNKNOWN,
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STATE_BELOW_HORIZON,
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STATE_CLOSED,
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STATE_NOT_HOME,
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):
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return 0
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return float(state.state)
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