142 lines
4.5 KiB
Python
142 lines
4.5 KiB
Python
"""
|
|
A sensor that monitors trands in other components.
|
|
|
|
For more details about this platform, please refer to the documentation at
|
|
https://home-assistant.io/components/sensor.trend/
|
|
"""
|
|
import asyncio
|
|
import logging
|
|
|
|
import voluptuous as vol
|
|
|
|
from homeassistant.core import callback
|
|
import homeassistant.helpers.config_validation as cv
|
|
|
|
from homeassistant.components.binary_sensor import (
|
|
BinarySensorDevice, ENTITY_ID_FORMAT, PLATFORM_SCHEMA,
|
|
DEVICE_CLASSES_SCHEMA)
|
|
from homeassistant.const import (
|
|
ATTR_FRIENDLY_NAME, ATTR_ENTITY_ID, CONF_SENSOR_CLASS,
|
|
CONF_DEVICE_CLASS, STATE_UNKNOWN,)
|
|
from homeassistant.helpers.deprecation import get_deprecated
|
|
from homeassistant.helpers.entity import generate_entity_id
|
|
from homeassistant.helpers.event import track_state_change
|
|
|
|
_LOGGER = logging.getLogger(__name__)
|
|
CONF_SENSORS = 'sensors'
|
|
CONF_ATTRIBUTE = 'attribute'
|
|
CONF_INVERT = 'invert'
|
|
|
|
SENSOR_SCHEMA = vol.Schema({
|
|
vol.Required(ATTR_ENTITY_ID): cv.entity_id,
|
|
vol.Optional(CONF_ATTRIBUTE): cv.string,
|
|
vol.Optional(ATTR_FRIENDLY_NAME): cv.string,
|
|
vol.Optional(CONF_INVERT, default=False): cv.boolean,
|
|
vol.Optional(CONF_SENSOR_CLASS): DEVICE_CLASSES_SCHEMA,
|
|
vol.Optional(CONF_DEVICE_CLASS): DEVICE_CLASSES_SCHEMA,
|
|
})
|
|
|
|
PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
|
|
vol.Required(CONF_SENSORS): vol.Schema({cv.slug: SENSOR_SCHEMA}),
|
|
})
|
|
|
|
|
|
# pylint: disable=unused-argument
|
|
def setup_platform(hass, config, add_devices, discovery_info=None):
|
|
"""Set up the trend sensors."""
|
|
sensors = []
|
|
|
|
for device, device_config in config[CONF_SENSORS].items():
|
|
entity_id = device_config[ATTR_ENTITY_ID]
|
|
attribute = device_config.get(CONF_ATTRIBUTE)
|
|
friendly_name = device_config.get(ATTR_FRIENDLY_NAME, device)
|
|
device_class = get_deprecated(
|
|
device_config, CONF_DEVICE_CLASS, CONF_SENSOR_CLASS)
|
|
invert = device_config[CONF_INVERT]
|
|
|
|
sensors.append(
|
|
SensorTrend(
|
|
hass, device, friendly_name, entity_id, attribute,
|
|
device_class, invert)
|
|
)
|
|
if not sensors:
|
|
_LOGGER.error("No sensors added")
|
|
return False
|
|
add_devices(sensors)
|
|
return True
|
|
|
|
|
|
class SensorTrend(BinarySensorDevice):
|
|
"""Representation of a trend Sensor."""
|
|
|
|
def __init__(self, hass, device_id, friendly_name,
|
|
target_entity, attribute, device_class, invert):
|
|
"""Initialize the sensor."""
|
|
self._hass = hass
|
|
self.entity_id = generate_entity_id(
|
|
ENTITY_ID_FORMAT, device_id, hass=hass)
|
|
self._name = friendly_name
|
|
self._target_entity = target_entity
|
|
self._attribute = attribute
|
|
self._device_class = device_class
|
|
self._invert = invert
|
|
self._state = None
|
|
self.from_state = None
|
|
self.to_state = None
|
|
|
|
@callback
|
|
def trend_sensor_state_listener(entity, old_state, new_state):
|
|
"""Handle the target device state changes."""
|
|
self.from_state = old_state
|
|
self.to_state = new_state
|
|
hass.async_add_job(self.async_update_ha_state(True))
|
|
|
|
track_state_change(hass, target_entity,
|
|
trend_sensor_state_listener)
|
|
|
|
@property
|
|
def name(self):
|
|
"""Return the name of the sensor."""
|
|
return self._name
|
|
|
|
@property
|
|
def is_on(self):
|
|
"""Return true if sensor is on."""
|
|
return self._state
|
|
|
|
@property
|
|
def device_class(self):
|
|
"""Return the sensor class of the sensor."""
|
|
return self._device_class
|
|
|
|
@property
|
|
def should_poll(self):
|
|
"""No polling needed."""
|
|
return False
|
|
|
|
@asyncio.coroutine
|
|
def async_update(self):
|
|
"""Get the latest data and update the states."""
|
|
if self.from_state is None or self.to_state is None:
|
|
return
|
|
if (self.from_state.state == STATE_UNKNOWN or
|
|
self.to_state.state == STATE_UNKNOWN):
|
|
return
|
|
try:
|
|
if self._attribute:
|
|
from_value = float(
|
|
self.from_state.attributes.get(self._attribute))
|
|
to_value = float(
|
|
self.to_state.attributes.get(self._attribute))
|
|
else:
|
|
from_value = float(self.from_state.state)
|
|
to_value = float(self.to_state.state)
|
|
|
|
self._state = to_value > from_value
|
|
if self._invert:
|
|
self._state = not self._state
|
|
|
|
except (ValueError, TypeError) as ex:
|
|
self._state = None
|
|
_LOGGER.error(ex)
|