106 lines
3.5 KiB
Python
106 lines
3.5 KiB
Python
"""
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Support for openexchangerates.org exchange rates service.
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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.openexchangerates/
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"""
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from datetime import timedelta
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import logging
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import requests
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from homeassistant.helpers.entity import Entity
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from homeassistant.util import Throttle
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from homeassistant.const import CONF_API_KEY
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_RESOURCE = 'https://openexchangerates.org/api/latest.json'
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_LOGGER = logging.getLogger(__name__)
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# Return cached results if last scan was less then this time ago.
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MIN_TIME_BETWEEN_UPDATES = timedelta(minutes=100)
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CONF_BASE = 'base'
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CONF_QUOTE = 'quote'
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CONF_NAME = 'name'
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DEFAULT_NAME = 'Exchange Rate Sensor'
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def setup_platform(hass, config, add_devices, discovery_info=None):
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"""Setup the Openexchangerates sensor."""
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payload = config.get('payload', None)
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rest = OpenexchangeratesData(
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_RESOURCE,
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config.get(CONF_API_KEY),
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config.get(CONF_BASE, 'USD'),
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config.get(CONF_QUOTE),
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payload
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)
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response = requests.get(_RESOURCE, params={'base': config.get(CONF_BASE,
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'USD'),
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'app_id':
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config.get(CONF_API_KEY)},
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timeout=10)
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if response.status_code != 200:
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_LOGGER.error("Check your OpenExchangeRates API")
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return False
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rest.update()
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add_devices([OpenexchangeratesSensor(rest, config.get(CONF_NAME,
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DEFAULT_NAME),
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config.get(CONF_QUOTE))])
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class OpenexchangeratesSensor(Entity):
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"""Representation of an Openexchangerates sensor."""
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def __init__(self, rest, name, quote):
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"""Initialize the sensor."""
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self.rest = rest
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self._name = name
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self._quote = quote
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self.update()
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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 device_state_attributes(self):
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"""Return other attributes of the sensor."""
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return self.rest.data
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def update(self):
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"""Update current conditions."""
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self.rest.update()
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value = self.rest.data
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self._state = round(value[str(self._quote)], 4)
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# pylint: disable=too-few-public-methods
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class OpenexchangeratesData(object):
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"""Get data from Openexchangerates.org."""
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# pylint: disable=too-many-arguments
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def __init__(self, resource, api_key, base, quote, data):
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"""Initialize the data object."""
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self._resource = resource
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self._api_key = api_key
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self._base = base
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self._quote = quote
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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 openexchangerates.org."""
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try:
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result = requests.get(self._resource, params={'base': self._base,
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'app_id':
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self._api_key},
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timeout=10)
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self.data = result.json()['rates']
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except requests.exceptions.HTTPError:
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_LOGGER.error("Check Openexchangerates API Key")
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self.data = None
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return False
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