112 lines
3.2 KiB
Python
112 lines
3.2 KiB
Python
"""Support for openexchangerates.org exchange rates service."""
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from datetime import timedelta
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import logging
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import requests
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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_API_KEY, CONF_NAME, CONF_BASE, CONF_QUOTE, ATTR_ATTRIBUTION)
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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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_LOGGER = logging.getLogger(__name__)
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_RESOURCE = 'https://openexchangerates.org/api/latest.json'
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ATTRIBUTION = "Data provided by openexchangerates.org"
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DEFAULT_BASE = 'USD'
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DEFAULT_NAME = 'Exchange Rate Sensor'
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MIN_TIME_BETWEEN_UPDATES = timedelta(hours=2)
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
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vol.Required(CONF_API_KEY): cv.string,
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vol.Required(CONF_QUOTE): cv.string,
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vol.Optional(CONF_BASE, default=DEFAULT_BASE): cv.string,
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vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
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})
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def setup_platform(hass, config, add_entities, discovery_info=None):
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"""Set up the Open Exchange Rates sensor."""
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name = config.get(CONF_NAME)
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api_key = config.get(CONF_API_KEY)
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base = config.get(CONF_BASE)
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quote = config.get(CONF_QUOTE)
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parameters = {
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'base': base,
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'app_id': api_key,
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}
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rest = OpenexchangeratesData(_RESOURCE, parameters, quote)
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response = requests.get(_RESOURCE, params=parameters, timeout=10)
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if response.status_code != 200:
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_LOGGER.error("Check your OpenExchangeRates API key")
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return False
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rest.update()
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add_entities([OpenexchangeratesSensor(rest, name, quote)], True)
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class OpenexchangeratesSensor(Entity):
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"""Representation of an Open Exchange Rates 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._state = None
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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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attr = self.rest.data
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attr[ATTR_ATTRIBUTION] = ATTRIBUTION
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return attr
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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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class OpenexchangeratesData:
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"""Get data from Openexchangerates.org."""
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def __init__(self, resource, parameters, quote):
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"""Initialize the data object."""
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self._resource = resource
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self._parameters = parameters
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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(
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self._resource, params=self._parameters, 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 the Openexchangerates API key")
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self.data = None
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return False
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