core/homeassistant/components/zone.py

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"""
homeassistant.components.zone
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allows defintion of zones in Home Assistant.
zone School:
latitude: 32.8773367
longitude: -117.2494053
# Optional radius in meters (default: 100)
radius: 250
# Optional icon to show instead of name
# See https://www.google.com/design/icons/
# Example: home, work, group-work, shopping-cart
icon: group-work
zone Work:
latitude: 32.8753367
longitude: -117.2474053
"""
import logging
from homeassistant.const import ATTR_HIDDEN, ATTR_LATITUDE, ATTR_LONGITUDE
from homeassistant.helpers import extract_domain_configs, generate_entity_id
from homeassistant.helpers.entity import Entity
from homeassistant.util.location import distance
DOMAIN = "zone"
DEPENDENCIES = []
ENTITY_ID_FORMAT = 'zone.{}'
ENTITY_ID_HOME = ENTITY_ID_FORMAT.format('home')
STATE = 'zoning'
ATTR_RADIUS = 'radius'
DEFAULT_RADIUS = 100
ATTR_ICON = 'icon'
ICON_HOME = 'home'
def in_zone(hass, latitude, longitude):
""" Find the zone for given latitude, longitude. """
# Sort entity IDs so that we are deterministic if equal distance to 2 zones
zones = (hass.states.get(entity_id) for entity_id
in sorted(hass.states.entity_ids(DOMAIN)))
min_dist = None
closest = None
for zone in zones:
zone_dist = distance(latitude, longitude,
zone.attributes[ATTR_LATITUDE],
zone.attributes[ATTR_LONGITUDE])
if zone_dist < zone.attributes[ATTR_RADIUS] and (closest is None or
zone_dist < min_dist):
min_dist = zone_dist
closest = zone
return closest
def setup(hass, config):
""" Setup zone. """
entities = set()
for key in extract_domain_configs(config, DOMAIN):
conf = config[key]
name = key.split(' ')[1]
latitude = conf.get(ATTR_LATITUDE)
longitude = conf.get(ATTR_LONGITUDE)
radius = conf.get(ATTR_RADIUS, DEFAULT_RADIUS)
icon = conf.get(ATTR_ICON)
if None in (latitude, longitude):
logging.getLogger(__name__).error(
'Each zone needs a latitude and longitude.')
continue
zone = Zone(hass, name, latitude, longitude, radius, icon)
zone.entity_id = generate_entity_id(ENTITY_ID_FORMAT, name, entities)
zone.update_ha_state()
entities.add(zone.entity_id)
if ENTITY_ID_HOME not in entities:
zone = Zone(hass, hass.config.location_name, hass.config.latitude,
hass.config.longitude, DEFAULT_RADIUS, ICON_HOME)
zone.entity_id = ENTITY_ID_HOME
zone.update_ha_state()
return True
class Zone(Entity):
""" Represents a Zone in Home Assistant. """
# pylint: disable=too-many-arguments
def __init__(self, hass, name, latitude, longitude, radius, icon):
self.hass = hass
self._name = name
self.latitude = latitude
self.longitude = longitude
self.radius = radius
self.icon = icon
def should_poll(self):
return False
@property
def name(self):
return self._name
@property
def state(self):
""" The state property really does nothing for a zone. """
return STATE
@property
def state_attributes(self):
attr = {
ATTR_HIDDEN: True,
ATTR_LATITUDE: self.latitude,
ATTR_LONGITUDE: self.longitude,
ATTR_RADIUS: self.radius,
}
if self.icon:
attr[ATTR_ICON] = self.icon
return attr