core/homeassistant/components/sensor/worldclock.py

67 lines
1.7 KiB
Python

"""
homeassistant.components.sensor.worldclock
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The Worldclock sensor let you display the current time of a different time
zone.
For more details about this platform, please refer to the documentation at
https://home-assistant.io/components/sensor.worldclock/
"""
import logging
import homeassistant.util.dt as dt_util
from homeassistant.helpers.entity import Entity
_LOGGER = logging.getLogger(__name__)
DEFAULT_NAME = "Worldclock Sensor"
ICON = 'mdi:clock'
def setup_platform(hass, config, add_devices, discovery_info=None):
""" Get the Worldclock sensor. """
try:
time_zone = dt_util.get_time_zone(config.get('time_zone'))
except AttributeError:
_LOGGER.error("time_zone in platform configuration is missing.")
return False
if time_zone is None:
_LOGGER.error("Timezone '%s' is not valid.", config.get('time_zone'))
return False
add_devices([WorldClockSensor(
time_zone,
config.get('name', DEFAULT_NAME)
)])
class WorldClockSensor(Entity):
""" Implements a Worldclock sensor. """
def __init__(self, time_zone, name):
self._name = name
self._time_zone = time_zone
self._state = None
self.update()
@property
def name(self):
""" Returns the name of the device. """
return self._name
@property
def state(self):
""" Returns the state of the device. """
return self._state
@property
def icon(self):
""" Icon to use in the frontend, if any. """
return ICON
def update(self):
""" Gets the time and updates the states. """
self._state = dt_util.datetime_to_time_str(
dt_util.now(time_zone=self._time_zone))