227 lines
8 KiB
Python
227 lines
8 KiB
Python
"""Support for representing current time of the day as binary sensors."""
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from datetime import datetime, timedelta
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import logging
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import pytz
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import voluptuous as vol
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from homeassistant.components.binary_sensor import PLATFORM_SCHEMA, BinarySensorDevice
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from homeassistant.const import (
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CONF_AFTER,
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CONF_BEFORE,
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CONF_NAME,
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SUN_EVENT_SUNRISE,
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SUN_EVENT_SUNSET,
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)
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from homeassistant.core import callback
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import homeassistant.helpers.config_validation as cv
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from homeassistant.helpers.event import async_track_point_in_utc_time
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from homeassistant.helpers.sun import get_astral_event_date, get_astral_event_next
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from homeassistant.util import dt as dt_util
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_LOGGER = logging.getLogger(__name__)
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ATTR_AFTER = "after"
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ATTR_BEFORE = "before"
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ATTR_NEXT_UPDATE = "next_update"
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CONF_AFTER_OFFSET = "after_offset"
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CONF_BEFORE_OFFSET = "before_offset"
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
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{
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vol.Required(CONF_AFTER): vol.Any(cv.time, vol.All(vol.Lower, cv.sun_event)),
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vol.Required(CONF_BEFORE): vol.Any(cv.time, vol.All(vol.Lower, cv.sun_event)),
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vol.Required(CONF_NAME): cv.string,
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vol.Optional(CONF_AFTER_OFFSET, default=timedelta(0)): cv.time_period,
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vol.Optional(CONF_BEFORE_OFFSET, default=timedelta(0)): cv.time_period,
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}
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)
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async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
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"""Set up the ToD sensors."""
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if hass.config.time_zone is None:
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_LOGGER.error("Timezone is not set in Home Assistant configuration")
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return
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after = config[CONF_AFTER]
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after_offset = config[CONF_AFTER_OFFSET]
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before = config[CONF_BEFORE]
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before_offset = config[CONF_BEFORE_OFFSET]
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name = config[CONF_NAME]
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sensor = TodSensor(name, after, after_offset, before, before_offset)
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async_add_entities([sensor])
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def is_sun_event(event):
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"""Return true if event is sun event not time."""
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return event in (SUN_EVENT_SUNRISE, SUN_EVENT_SUNSET)
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class TodSensor(BinarySensorDevice):
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"""Time of the Day Sensor."""
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def __init__(self, name, after, after_offset, before, before_offset):
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"""Init the ToD Sensor..."""
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self._name = name
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self._time_before = self._time_after = self._next_update = None
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self._after_offset = after_offset
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self._before_offset = before_offset
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self._before = before
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self._after = after
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@property
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def should_poll(self):
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"""Sensor does not need to be polled."""
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return False
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@property
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def name(self):
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"""Return the name of the sensor."""
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return self._name
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@property
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def after(self):
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"""Return the timestamp for the beginning of the period."""
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return self._time_after
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@property
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def before(self):
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"""Return the timestamp for the end of the period."""
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return self._time_before
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@property
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def is_on(self):
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"""Return True is sensor is on."""
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if self.after < self.before:
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return self.after <= self.current_datetime < self.before
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return False
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@property
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def current_datetime(self):
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"""Return local current datetime according to hass configuration."""
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return dt_util.utcnow()
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@property
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def next_update(self):
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"""Return the next update point in the UTC time."""
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return self._next_update
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@property
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def device_state_attributes(self):
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"""Return the state attributes of the sensor."""
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return {
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ATTR_AFTER: self.after.astimezone(self.hass.config.time_zone).isoformat(),
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ATTR_BEFORE: self.before.astimezone(self.hass.config.time_zone).isoformat(),
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ATTR_NEXT_UPDATE: self.next_update.astimezone(
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self.hass.config.time_zone
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).isoformat(),
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}
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def _naive_time_to_utc_datetime(self, naive_time):
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"""Convert naive time from config to utc_datetime with current day."""
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# get the current local date from utc time
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current_local_date = self.current_datetime.astimezone(
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self.hass.config.time_zone
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).date()
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# calcuate utc datetime corecponding to local time
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utc_datetime = self.hass.config.time_zone.localize(
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datetime.combine(current_local_date, naive_time)
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).astimezone(tz=pytz.UTC)
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return utc_datetime
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def _calculate_initial_boudary_time(self):
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"""Calculate internal absolute time boudaries."""
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nowutc = self.current_datetime
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# If after value is a sun event instead of absolute time
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if is_sun_event(self._after):
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# Calculate the today's event utc time or
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# if not available take next
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after_event_date = get_astral_event_date(
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self.hass, self._after, nowutc
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) or get_astral_event_next(self.hass, self._after, nowutc)
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else:
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# Convert local time provided to UTC today
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# datetime.combine(date, time, tzinfo) is not supported
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# in python 3.5. The self._after is provided
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# with hass configured TZ not system wide
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after_event_date = self._naive_time_to_utc_datetime(self._after)
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self._time_after = after_event_date
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# If before value is a sun event instead of absolute time
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if is_sun_event(self._before):
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# Calculate the today's event utc time or if not available take
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# next
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before_event_date = get_astral_event_date(
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self.hass, self._before, nowutc
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) or get_astral_event_next(self.hass, self._before, nowutc)
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# Before is earlier than after
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if before_event_date < after_event_date:
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# Take next day for before
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before_event_date = get_astral_event_next(
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self.hass, self._before, after_event_date
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)
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else:
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# Convert local time provided to UTC today, see above
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before_event_date = self._naive_time_to_utc_datetime(self._before)
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# It is safe to add timedelta days=1 to UTC as there is no DST
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if before_event_date < after_event_date + self._after_offset:
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before_event_date += timedelta(days=1)
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self._time_before = before_event_date
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# Add offset to utc boundaries according to the configuration
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self._time_after += self._after_offset
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self._time_before += self._before_offset
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def _turn_to_next_day(self):
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"""Turn to to the next day."""
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if is_sun_event(self._after):
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self._time_after = get_astral_event_next(
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self.hass, self._after, self._time_after - self._after_offset
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)
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self._time_after += self._after_offset
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else:
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# Offset is already there
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self._time_after += timedelta(days=1)
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if is_sun_event(self._before):
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self._time_before = get_astral_event_next(
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self.hass, self._before, self._time_before - self._before_offset
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)
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self._time_before += self._before_offset
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else:
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# Offset is already there
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self._time_before += timedelta(days=1)
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async def async_added_to_hass(self):
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"""Call when entity about to be added to Home Assistant."""
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self._calculate_initial_boudary_time()
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self._calculate_next_update()
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self._point_in_time_listener(dt_util.now())
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def _calculate_next_update(self):
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"""Datetime when the next update to the state."""
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now = self.current_datetime
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if now < self.after:
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self._next_update = self.after
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return
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if now < self.before:
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self._next_update = self.before
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return
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self._turn_to_next_day()
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self._next_update = self.after
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@callback
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def _point_in_time_listener(self, now):
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"""Run when the state of the sensor should be updated."""
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self._calculate_next_update()
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self.async_schedule_update_ha_state()
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async_track_point_in_utc_time(
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self.hass, self._point_in_time_listener, self.next_update
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)
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