245 lines
9.0 KiB
Python
245 lines
9.0 KiB
Python
"""Utility meter from sensors providing raw data."""
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import logging
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from datetime import date, timedelta
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from decimal import Decimal, DecimalException
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import homeassistant.util.dt as dt_util
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from homeassistant.const import (
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CONF_NAME, ATTR_UNIT_OF_MEASUREMENT,
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EVENT_HOMEASSISTANT_START, STATE_UNKNOWN, STATE_UNAVAILABLE)
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from homeassistant.core import callback
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from homeassistant.helpers.event import (
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async_track_state_change, async_track_time_change)
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from homeassistant.helpers.dispatcher import (
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async_dispatcher_connect)
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from homeassistant.helpers.restore_state import RestoreEntity
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from .const import (
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DATA_UTILITY, SIGNAL_RESET_METER,
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HOURLY, DAILY, WEEKLY, MONTHLY, YEARLY,
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CONF_SOURCE_SENSOR, CONF_METER_TYPE, CONF_METER_OFFSET,
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CONF_METER_NET_CONSUMPTION, CONF_TARIFF, CONF_TARIFF_ENTITY, CONF_METER)
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_LOGGER = logging.getLogger(__name__)
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ATTR_SOURCE_ID = 'source'
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ATTR_STATUS = 'status'
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ATTR_PERIOD = 'meter_period'
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ATTR_LAST_PERIOD = 'last_period'
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ATTR_LAST_RESET = 'last_reset'
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ATTR_TARIFF = 'tariff'
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ICON = 'mdi:counter'
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PRECISION = 3
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PAUSED = 'paused'
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COLLECTING = 'collecting'
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async def async_setup_platform(
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hass, config, async_add_entities, discovery_info=None):
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"""Set up the utility meter sensor."""
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if discovery_info is None:
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_LOGGER.error("This platform is only available through discovery")
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return
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meters = []
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for conf in discovery_info:
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meter = conf[CONF_METER]
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conf_meter_source = hass.data[DATA_UTILITY][meter][CONF_SOURCE_SENSOR]
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conf_meter_type = hass.data[DATA_UTILITY][meter].get(CONF_METER_TYPE)
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conf_meter_offset = hass.data[DATA_UTILITY][meter][CONF_METER_OFFSET]
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conf_meter_net_consumption =\
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hass.data[DATA_UTILITY][meter][CONF_METER_NET_CONSUMPTION]
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conf_meter_tariff_entity = hass.data[DATA_UTILITY][meter].get(
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CONF_TARIFF_ENTITY)
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meters.append(UtilityMeterSensor(
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conf_meter_source, conf.get(CONF_NAME), conf_meter_type,
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conf_meter_offset, conf_meter_net_consumption,
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conf.get(CONF_TARIFF), conf_meter_tariff_entity))
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async_add_entities(meters)
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class UtilityMeterSensor(RestoreEntity):
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"""Representation of an utility meter sensor."""
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def __init__(self, source_entity, name, meter_type, meter_offset,
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net_consumption, tariff=None, tariff_entity=None):
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"""Initialize the Utility Meter sensor."""
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self._sensor_source_id = source_entity
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self._state = 0
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self._last_period = 0
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self._last_reset = dt_util.now()
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self._collecting = None
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if name:
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self._name = name
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else:
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self._name = '{} meter'.format(source_entity)
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self._unit_of_measurement = None
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self._period = meter_type
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self._period_offset = meter_offset
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self._sensor_net_consumption = net_consumption
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self._tariff = tariff
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self._tariff_entity = tariff_entity
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@callback
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def async_reading(self, entity, old_state, new_state):
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"""Handle the sensor state changes."""
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if old_state is None or new_state is None or\
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old_state.state in [STATE_UNKNOWN, STATE_UNAVAILABLE] or\
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new_state.state in [STATE_UNKNOWN, STATE_UNAVAILABLE]:
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return
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if self._unit_of_measurement is None and\
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new_state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) is not None:
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self._unit_of_measurement = new_state.attributes.get(
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ATTR_UNIT_OF_MEASUREMENT)
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try:
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diff = Decimal(new_state.state) - Decimal(old_state.state)
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if (not self._sensor_net_consumption) and diff < 0:
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# Source sensor just rolled over for unknow reasons,
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return
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self._state += diff
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except ValueError as err:
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_LOGGER.warning("While processing state changes: %s", err)
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except DecimalException as err:
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_LOGGER.warning("Invalid state (%s > %s): %s",
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old_state.state, new_state.state, err)
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self.async_schedule_update_ha_state()
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@callback
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def async_tariff_change(self, entity, old_state, new_state):
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"""Handle tariff changes."""
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if self._tariff == new_state.state:
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self._collecting = async_track_state_change(
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self.hass, self._sensor_source_id, self.async_reading)
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else:
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if self._collecting:
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self._collecting()
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self._collecting = None
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_LOGGER.debug("%s - %s - source <%s>", self._name,
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COLLECTING if self._collecting is not None
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else PAUSED, self._sensor_source_id)
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self.async_schedule_update_ha_state()
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async def _async_reset_meter(self, event):
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"""Determine cycle - Helper function for larger than daily cycles."""
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now = dt_util.now().date()
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if self._period == WEEKLY and\
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now != now - timedelta(days=now.weekday())\
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+ self._period_offset:
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return
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if self._period == MONTHLY and\
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now != date(now.year, now.month, 1) + self._period_offset:
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return
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if self._period == YEARLY and\
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now != date(now.year, 1, 1) + self._period_offset:
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return
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await self.async_reset_meter(self._tariff_entity)
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async def async_reset_meter(self, entity_id):
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"""Reset meter."""
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if self._tariff_entity != entity_id:
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return
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_LOGGER.debug("Reset utility meter <%s>", self.entity_id)
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self._last_reset = dt_util.now()
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self._last_period = str(self._state)
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self._state = 0
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await self.async_update_ha_state()
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async def async_added_to_hass(self):
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"""Handle entity which will be added."""
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await super().async_added_to_hass()
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if self._period == HOURLY:
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async_track_time_change(
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self.hass, self._async_reset_meter,
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minute=self._period_offset.seconds // 60,
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second=self._period_offset.seconds % 60)
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elif self._period in [DAILY, WEEKLY, MONTHLY, YEARLY]:
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async_track_time_change(
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self.hass, self._async_reset_meter,
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hour=self._period_offset.seconds // 3600,
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minute=self._period_offset.seconds % 3600 // 60,
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second=self._period_offset.seconds % 3600 % 60)
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async_dispatcher_connect(
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self.hass, SIGNAL_RESET_METER, self.async_reset_meter)
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state = await self.async_get_last_state()
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if state:
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self._state = Decimal(state.state)
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self._unit_of_measurement = state.attributes.get(
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ATTR_UNIT_OF_MEASUREMENT)
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self._last_period = state.attributes.get(ATTR_LAST_PERIOD)
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self._last_reset = state.attributes.get(ATTR_LAST_RESET)
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await self.async_update_ha_state()
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if state.attributes.get(ATTR_STATUS) == PAUSED:
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# Fake cancellation function to init the meter paused
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self._collecting = lambda: None
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@callback
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def async_source_tracking(event):
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"""Wait for source to be ready, then start meter."""
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if self._tariff_entity is not None:
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_LOGGER.debug("Track %s", self._tariff_entity)
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async_track_state_change(
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self.hass, self._tariff_entity, self.async_tariff_change)
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tariff_entity_state = self.hass.states.get(self._tariff_entity)
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if self._tariff != tariff_entity_state.state:
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return
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_LOGGER.debug("tracking source: %s", self._sensor_source_id)
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self._collecting = async_track_state_change(
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self.hass, self._sensor_source_id, self.async_reading)
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self.hass.bus.async_listen_once(
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EVENT_HOMEASSISTANT_START, async_source_tracking)
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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 state(self):
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"""Return the state of the sensor."""
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return self._state
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@property
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def unit_of_measurement(self):
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"""Return the unit the value is expressed in."""
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return self._unit_of_measurement
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@property
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def should_poll(self):
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"""No polling needed."""
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return False
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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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state_attr = {
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ATTR_SOURCE_ID: self._sensor_source_id,
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ATTR_STATUS: PAUSED if self._collecting is None else COLLECTING,
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ATTR_LAST_PERIOD: self._last_period,
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ATTR_LAST_RESET: self._last_reset,
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}
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if self._period is not None:
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state_attr[ATTR_PERIOD] = self._period
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if self._tariff is not None:
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state_attr[ATTR_TARIFF] = self._tariff
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return state_attr
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@property
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def icon(self):
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"""Return the icon to use in the frontend, if any."""
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return ICON
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