264 lines
8.7 KiB
Python
264 lines
8.7 KiB
Python
"""Allows the creation of a sensor that breaks out state_attributes."""
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import logging
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from typing import Optional
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import voluptuous as vol
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from homeassistant.core import callback
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from homeassistant.components.sensor import (
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ENTITY_ID_FORMAT,
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PLATFORM_SCHEMA,
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DEVICE_CLASSES_SCHEMA,
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)
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from homeassistant.const import (
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ATTR_FRIENDLY_NAME,
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ATTR_UNIT_OF_MEASUREMENT,
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CONF_VALUE_TEMPLATE,
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CONF_ICON_TEMPLATE,
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CONF_ENTITY_PICTURE_TEMPLATE,
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ATTR_ENTITY_ID,
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CONF_SENSORS,
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EVENT_HOMEASSISTANT_START,
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CONF_FRIENDLY_NAME_TEMPLATE,
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MATCH_ALL,
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CONF_DEVICE_CLASS,
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)
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from homeassistant.exceptions import TemplateError
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import homeassistant.helpers.config_validation as cv
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from homeassistant.helpers.entity import Entity, async_generate_entity_id
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from homeassistant.helpers.event import async_track_state_change
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_LOGGER = logging.getLogger(__name__)
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SENSOR_SCHEMA = vol.Schema(
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{
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vol.Required(CONF_VALUE_TEMPLATE): cv.template,
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vol.Optional(CONF_ICON_TEMPLATE): cv.template,
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vol.Optional(CONF_ENTITY_PICTURE_TEMPLATE): cv.template,
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vol.Optional(CONF_FRIENDLY_NAME_TEMPLATE): cv.template,
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vol.Optional(ATTR_FRIENDLY_NAME): cv.string,
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vol.Optional(ATTR_UNIT_OF_MEASUREMENT): cv.string,
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vol.Optional(CONF_DEVICE_CLASS): DEVICE_CLASSES_SCHEMA,
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vol.Optional(ATTR_ENTITY_ID): cv.entity_ids,
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}
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)
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
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{vol.Required(CONF_SENSORS): cv.schema_with_slug_keys(SENSOR_SCHEMA)}
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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 template sensors."""
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sensors = []
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for device, device_config in config[CONF_SENSORS].items():
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state_template = device_config[CONF_VALUE_TEMPLATE]
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icon_template = device_config.get(CONF_ICON_TEMPLATE)
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entity_picture_template = device_config.get(CONF_ENTITY_PICTURE_TEMPLATE)
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friendly_name = device_config.get(ATTR_FRIENDLY_NAME, device)
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friendly_name_template = device_config.get(CONF_FRIENDLY_NAME_TEMPLATE)
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unit_of_measurement = device_config.get(ATTR_UNIT_OF_MEASUREMENT)
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device_class = device_config.get(CONF_DEVICE_CLASS)
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entity_ids = set()
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manual_entity_ids = device_config.get(ATTR_ENTITY_ID)
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invalid_templates = []
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for tpl_name, template in (
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(CONF_VALUE_TEMPLATE, state_template),
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(CONF_ICON_TEMPLATE, icon_template),
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(CONF_ENTITY_PICTURE_TEMPLATE, entity_picture_template),
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(CONF_FRIENDLY_NAME_TEMPLATE, friendly_name_template),
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):
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if template is None:
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continue
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template.hass = hass
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if manual_entity_ids is not None:
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continue
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template_entity_ids = template.extract_entities()
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if template_entity_ids == MATCH_ALL:
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entity_ids = MATCH_ALL
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# Cut off _template from name
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invalid_templates.append(tpl_name[:-9])
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elif entity_ids != MATCH_ALL:
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entity_ids |= set(template_entity_ids)
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if invalid_templates:
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_LOGGER.warning(
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"Template sensor %s has no entity ids configured to track nor"
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" were we able to extract the entities to track from the %s "
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"template(s). This entity will only be able to be updated "
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"manually.",
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device,
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", ".join(invalid_templates),
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)
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if manual_entity_ids is not None:
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entity_ids = manual_entity_ids
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elif entity_ids != MATCH_ALL:
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entity_ids = list(entity_ids)
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sensors.append(
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SensorTemplate(
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hass,
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device,
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friendly_name,
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friendly_name_template,
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unit_of_measurement,
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state_template,
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icon_template,
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entity_picture_template,
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entity_ids,
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device_class,
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)
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)
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if not sensors:
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_LOGGER.error("No sensors added")
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return False
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async_add_entities(sensors)
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return True
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class SensorTemplate(Entity):
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"""Representation of a Template Sensor."""
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def __init__(
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self,
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hass,
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device_id,
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friendly_name,
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friendly_name_template,
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unit_of_measurement,
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state_template,
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icon_template,
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entity_picture_template,
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entity_ids,
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device_class,
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):
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"""Initialize the sensor."""
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self.hass = hass
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self.entity_id = async_generate_entity_id(
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ENTITY_ID_FORMAT, device_id, hass=hass
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)
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self._name = friendly_name
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self._friendly_name_template = friendly_name_template
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self._unit_of_measurement = unit_of_measurement
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self._template = state_template
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self._state = None
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self._icon_template = icon_template
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self._entity_picture_template = entity_picture_template
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self._icon = None
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self._entity_picture = None
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self._entities = entity_ids
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self._device_class = device_class
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async def async_added_to_hass(self):
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"""Register callbacks."""
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@callback
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def template_sensor_state_listener(entity, old_state, new_state):
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"""Handle device state changes."""
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self.async_schedule_update_ha_state(True)
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@callback
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def template_sensor_startup(event):
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"""Update template on startup."""
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if self._entities != MATCH_ALL:
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# Track state change only for valid templates
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async_track_state_change(
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self.hass, self._entities, template_sensor_state_listener
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)
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self.async_schedule_update_ha_state(True)
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self.hass.bus.async_listen_once(
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EVENT_HOMEASSISTANT_START, template_sensor_startup
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)
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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 icon(self):
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"""Return the icon to use in the frontend, if any."""
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return self._icon
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@property
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def device_class(self) -> Optional[str]:
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"""Return the device class of the sensor."""
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return self._device_class
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@property
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def entity_picture(self):
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"""Return the entity_picture to use in the frontend, if any."""
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return self._entity_picture
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@property
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def unit_of_measurement(self):
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"""Return the unit_of_measurement of the device."""
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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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async def async_update(self):
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"""Update the state from the template."""
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try:
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self._state = self._template.async_render()
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except TemplateError as ex:
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if ex.args and ex.args[0].startswith(
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"UndefinedError: 'None' has no attribute"
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):
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# Common during HA startup - so just a warning
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_LOGGER.warning(
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"Could not render template %s," " the state is unknown.", self._name
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)
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else:
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self._state = None
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_LOGGER.error("Could not render template %s: %s", self._name, ex)
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for property_name, template in (
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("_icon", self._icon_template),
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("_entity_picture", self._entity_picture_template),
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("_name", self._friendly_name_template),
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):
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if template is None:
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continue
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try:
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setattr(self, property_name, template.async_render())
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except TemplateError as ex:
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friendly_property_name = property_name[1:].replace("_", " ")
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if ex.args and ex.args[0].startswith(
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"UndefinedError: 'None' has no attribute"
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):
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# Common during HA startup - so just a warning
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_LOGGER.warning(
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"Could not render %s template %s," " the state is unknown.",
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friendly_property_name,
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self._name,
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)
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continue
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try:
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setattr(self, property_name, getattr(super(), property_name))
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except AttributeError:
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_LOGGER.error(
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"Could not render %s template %s: %s",
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friendly_property_name,
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self._name,
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ex,
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)
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