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"""Offer reusable conditions."""
from datetime import timedelta
import functools as ft
import logging
import sys
from homeassistant.helpers.typing import ConfigType
from homeassistant.core import HomeAssistant
from homeassistant.components import zone as zone_cmp
from homeassistant.const import (
ATTR_GPS_ACCURACY, ATTR_LATITUDE, ATTR_LONGITUDE,
CONF_ENTITY_ID, CONF_VALUE_TEMPLATE, CONF_CONDITION,
WEEKDAYS, CONF_STATE, CONF_ZONE, CONF_BEFORE,
CONF_AFTER, CONF_WEEKDAY, SUN_EVENT_SUNRISE, SUN_EVENT_SUNSET,
CONF_BELOW, CONF_ABOVE, STATE_UNAVAILABLE, STATE_UNKNOWN)
from homeassistant.exceptions import TemplateError, HomeAssistantError
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.sun import get_astral_event_date
import homeassistant.util.dt as dt_util
from homeassistant.util.async_ import run_callback_threadsafe
FROM_CONFIG_FORMAT = '{}_from_config'
ASYNC_FROM_CONFIG_FORMAT = 'async_{}_from_config'
_LOGGER = logging.getLogger(__name__)
# PyLint does not like the use of _threaded_factory
# pylint: disable=invalid-name
def _threaded_factory(async_factory):
"""Create threaded versions of async factories."""
@ft.wraps(async_factory)
def factory(config, config_validation=True):
"""Threaded factory."""
async_check = async_factory(config, config_validation)
def condition_if(hass, variables=None):
"""Validate condition."""
return run_callback_threadsafe(
hass.loop, async_check, hass, variables,
).result()
return condition_if
return factory
def async_from_config(config: ConfigType, config_validation: bool = True):
"""Turn a condition configuration into a method.
Should be run on the event loop.
"""
for fmt in (ASYNC_FROM_CONFIG_FORMAT, FROM_CONFIG_FORMAT):
factory = getattr(
sys.modules[__name__],
fmt.format(config.get(CONF_CONDITION)), None)
if factory:
break
if factory is None:
raise HomeAssistantError('Invalid condition "{}" specified {}'.format(
config.get(CONF_CONDITION), config))
return factory(config, config_validation)
from_config = _threaded_factory(async_from_config)
def async_and_from_config(config: ConfigType, config_validation: bool = True):
"""Create multi condition matcher using 'AND'."""
if config_validation:
config = cv.AND_CONDITION_SCHEMA(config)
checks = None
def if_and_condition(hass: HomeAssistant,
variables=None) -> bool:
"""Test and condition."""
nonlocal checks
if checks is None:
checks = [async_from_config(entry, False) for entry
in config['conditions']]
try:
for check in checks:
if not check(hass, variables):
return False
except Exception as ex: # pylint: disable=broad-except
_LOGGER.warning("Error during and-condition: %s", ex)
return False
return True
return if_and_condition
and_from_config = _threaded_factory(async_and_from_config)
def async_or_from_config(config: ConfigType, config_validation: bool = True):
"""Create multi condition matcher using 'OR'."""
if config_validation:
config = cv.OR_CONDITION_SCHEMA(config)
checks = None
def if_or_condition(hass: HomeAssistant,
variables=None) -> bool:
"""Test and condition."""
nonlocal checks
if checks is None:
checks = [async_from_config(entry, False) for entry
in config['conditions']]
try:
for check in checks:
if check(hass, variables):
return True
except Exception as ex: # pylint: disable=broad-except
_LOGGER.warning("Error during or-condition: %s", ex)
return False
return if_or_condition
or_from_config = _threaded_factory(async_or_from_config)
def numeric_state(hass: HomeAssistant, entity, below=None, above=None,
value_template=None, variables=None):
"""Test a numeric state condition."""
return run_callback_threadsafe(
hass.loop, async_numeric_state, hass, entity, below, above,
value_template, variables,
).result()
def async_numeric_state(hass: HomeAssistant, entity, below=None, above=None,
value_template=None, variables=None):
"""Test a numeric state condition."""
if isinstance(entity, str):
entity = hass.states.get(entity)
if entity is None:
return False
if value_template is None:
value = entity.state
else:
variables = dict(variables or {})
variables['state'] = entity
try:
value = value_template.async_render(variables)
except TemplateError as ex:
_LOGGER.error("Template error: %s", ex)
return False
if value in (STATE_UNAVAILABLE, STATE_UNKNOWN):
return False
try:
value = float(value)
except ValueError:
_LOGGER.warning("Value cannot be processed as a number: %s "
"(Offending entity: %s)", entity, value)
return False
if below is not None and value >= below:
return False
if above is not None and value <= above:
return False
return True
def async_numeric_state_from_config(config, config_validation=True):
"""Wrap action method with state based condition."""
if config_validation:
config = cv.NUMERIC_STATE_CONDITION_SCHEMA(config)
entity_id = config.get(CONF_ENTITY_ID)
below = config.get(CONF_BELOW)
above = config.get(CONF_ABOVE)
value_template = config.get(CONF_VALUE_TEMPLATE)
def if_numeric_state(hass, variables=None):
"""Test numeric state condition."""
if value_template is not None:
value_template.hass = hass
return async_numeric_state(
hass, entity_id, below, above, value_template, variables)
return if_numeric_state
numeric_state_from_config = _threaded_factory(async_numeric_state_from_config)
def state(hass, entity, req_state, for_period=None):
"""Test if state matches requirements.
Async friendly.
"""
if isinstance(entity, str):
entity = hass.states.get(entity)
if entity is None:
return False
is_state = entity.state == req_state
if for_period is None or not is_state:
return is_state
return dt_util.utcnow() - for_period > entity.last_changed
def state_from_config(config, config_validation=True):
"""Wrap action method with state based condition."""
if config_validation:
config = cv.STATE_CONDITION_SCHEMA(config)
entity_id = config.get(CONF_ENTITY_ID)
req_state = config.get(CONF_STATE)
for_period = config.get('for')
def if_state(hass, variables=None):
"""Test if condition."""
return state(hass, entity_id, req_state, for_period)
return if_state
def sun(hass, before=None, after=None, before_offset=None, after_offset=None):
"""Test if current time matches sun requirements."""
utcnow = dt_util.utcnow()
today = dt_util.as_local(utcnow).date()
before_offset = before_offset or timedelta(0)
after_offset = after_offset or timedelta(0)
sunrise = get_astral_event_date(hass, SUN_EVENT_SUNRISE, today)
sunset = get_astral_event_date(hass, SUN_EVENT_SUNSET, today)
if sunrise is None and SUN_EVENT_SUNRISE in (before, after):
# There is no sunrise today
return False
if sunset is None and SUN_EVENT_SUNSET in (before, after):
# There is no sunset today
return False
if before == SUN_EVENT_SUNRISE and utcnow > sunrise + before_offset:
return False
if before == SUN_EVENT_SUNSET and utcnow > sunset + before_offset:
return False
if after == SUN_EVENT_SUNRISE and utcnow < sunrise + after_offset:
return False
if after == SUN_EVENT_SUNSET and utcnow < sunset + after_offset:
return False
return True
def sun_from_config(config, config_validation=True):
"""Wrap action method with sun based condition."""
if config_validation:
config = cv.SUN_CONDITION_SCHEMA(config)
before = config.get('before')
after = config.get('after')
before_offset = config.get('before_offset')
after_offset = config.get('after_offset')
def time_if(hass, variables=None):
"""Validate time based if-condition."""
return sun(hass, before, after, before_offset, after_offset)
return time_if
def template(hass, value_template, variables=None):
"""Test if template condition matches."""
return run_callback_threadsafe(
hass.loop, async_template, hass, value_template, variables,
).result()
def async_template(hass, value_template, variables=None):
"""Test if template condition matches."""
try:
value = value_template.async_render(variables)
except TemplateError as ex:
_LOGGER.error("Error during template condition: %s", ex)
return False
return value.lower() == 'true'
def async_template_from_config(config, config_validation=True):
"""Wrap action method with state based condition."""
if config_validation:
config = cv.TEMPLATE_CONDITION_SCHEMA(config)
value_template = config.get(CONF_VALUE_TEMPLATE)
def template_if(hass, variables=None):
"""Validate template based if-condition."""
value_template.hass = hass
return async_template(hass, value_template, variables)
return template_if
template_from_config = _threaded_factory(async_template_from_config)
def time(before=None, after=None, weekday=None):
"""Test if local time condition matches.
Handle the fact that time is continuous and we may be testing for
a period that crosses midnight. In that case it is easier to test
for the opposite. "(23:59 <= now < 00:01)" would be the same as
"not (00:01 <= now < 23:59)".
"""
now = dt_util.now()
now_time = now.time()
if after is None:
after = dt_util.dt.time(0)
if before is None:
before = dt_util.dt.time(23, 59, 59, 999999)
if after < before:
if not after <= now_time < before:
return False
else:
if before <= now_time < after:
return False
if weekday is not None:
now_weekday = WEEKDAYS[now.weekday()]
if isinstance(weekday, str) and weekday != now_weekday or \
now_weekday not in weekday:
return False
return True
def time_from_config(config, config_validation=True):
"""Wrap action method with time based condition."""
if config_validation:
config = cv.TIME_CONDITION_SCHEMA(config)
before = config.get(CONF_BEFORE)
after = config.get(CONF_AFTER)
weekday = config.get(CONF_WEEKDAY)
def time_if(hass, variables=None):
"""Validate time based if-condition."""
return time(before, after, weekday)
return time_if
def zone(hass, zone_ent, entity):
"""Test if zone-condition matches.
Async friendly.
"""
if isinstance(zone_ent, str):
zone_ent = hass.states.get(zone_ent)
if zone_ent is None:
return False
if isinstance(entity, str):
entity = hass.states.get(entity)
if entity is None:
return False
latitude = entity.attributes.get(ATTR_LATITUDE)
longitude = entity.attributes.get(ATTR_LONGITUDE)
if latitude is None or longitude is None:
return False
return zone_cmp.zone.in_zone(zone_ent, latitude, longitude,
entity.attributes.get(ATTR_GPS_ACCURACY, 0))
def zone_from_config(config, config_validation=True):
"""Wrap action method with zone based condition."""
if config_validation:
config = cv.ZONE_CONDITION_SCHEMA(config)
entity_id = config.get(CONF_ENTITY_ID)
zone_entity_id = config.get(CONF_ZONE)
def if_in_zone(hass, variables=None):
"""Test if condition."""
return zone(hass, zone_entity_id, entity_id)
return if_in_zone