122 lines
3.5 KiB
Python
122 lines
3.5 KiB
Python
"""
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Support for showing values from Dweet.io.
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For more details about this platform, please refer to the documentation at
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https://home-assistant.io/components/sensor.dweet/
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"""
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import json
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import logging
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from datetime import timedelta
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import voluptuous as vol
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from homeassistant.components.sensor import PLATFORM_SCHEMA
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from homeassistant.const import (
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CONF_NAME, CONF_VALUE_TEMPLATE, STATE_UNKNOWN, CONF_UNIT_OF_MEASUREMENT)
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import homeassistant.helpers.config_validation as cv
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from homeassistant.helpers.entity import Entity
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from homeassistant.util import Throttle
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REQUIREMENTS = ['dweepy==0.3.0']
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_LOGGER = logging.getLogger(__name__)
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CONF_DEVICE = 'device'
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DEFAULT_NAME = 'Dweet.io Sensor'
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MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=60)
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
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vol.Required(CONF_DEVICE): cv.string,
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vol.Required(CONF_VALUE_TEMPLATE): cv.template,
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vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
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vol.Optional(CONF_UNIT_OF_MEASUREMENT): cv.string,
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})
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# pylint: disable=unused-variable, too-many-function-args
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def setup_platform(hass, config, add_devices, discovery_info=None):
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"""Set up the Dweet sensor."""
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import dweepy
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name = config.get(CONF_NAME)
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device = config.get(CONF_DEVICE)
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value_template = config.get(CONF_VALUE_TEMPLATE)
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unit = config.get(CONF_UNIT_OF_MEASUREMENT)
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if value_template is not None:
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value_template.hass = hass
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try:
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content = json.dumps(dweepy.get_latest_dweet_for(device)[0]['content'])
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except dweepy.DweepyError:
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_LOGGER.error("Device/thing %s could not be found", device)
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return False
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if value_template.render_with_possible_json_value(content) == '':
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_LOGGER.error("%s was not found", value_template)
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return False
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dweet = DweetData(device)
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add_devices([DweetSensor(hass, dweet, name, value_template, unit)], True)
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class DweetSensor(Entity):
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"""Representation of a Dweet sensor."""
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def __init__(self, hass, dweet, name, value_template, unit_of_measurement):
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"""Initialize the sensor."""
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self.hass = hass
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self.dweet = dweet
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self._name = name
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self._value_template = value_template
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self._state = STATE_UNKNOWN
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self._unit_of_measurement = unit_of_measurement
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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 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 state(self):
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"""Return the state."""
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return self._state
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def update(self):
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"""Get the latest data from REST API."""
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self.dweet.update()
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if self.dweet.data is None:
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self._state = STATE_UNKNOWN
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else:
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values = json.dumps(self.dweet.data[0]['content'])
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self._state = self._value_template.render_with_possible_json_value(
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values, STATE_UNKNOWN)
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class DweetData(object):
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"""The class for handling the data retrieval."""
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def __init__(self, device):
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"""Initialize the sensor."""
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self._device = device
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self.data = None
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@Throttle(MIN_TIME_BETWEEN_UPDATES)
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def update(self):
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"""Get the latest data from Dweet.io."""
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import dweepy
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try:
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self.data = dweepy.get_latest_dweet_for(self._device)
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except dweepy.DweepyError:
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_LOGGER.warning("Device %s doesn't contain any data", self._device)
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self.data = None
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