239 lines
8.6 KiB
Python
239 lines
8.6 KiB
Python
"""
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homeassistant.components.proximity
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Component to monitor the proximity of devices to a particular zone and the
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direction of travel.
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For more details about this component, please refer to the documentation at
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https://home-assistant.io/components/proximity/
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"""
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import logging
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from homeassistant.helpers.event import track_state_change
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from homeassistant.helpers.entity import Entity
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from homeassistant.util.location import distance
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DEPENDENCIES = ['zone', 'device_tracker']
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DOMAIN = 'proximity'
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# Default tolerance
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DEFAULT_TOLERANCE = 1
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# Default zone
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DEFAULT_PROXIMITY_ZONE = 'home'
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# Entity attributes
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ATTR_DIST_FROM = 'dist_to_zone'
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ATTR_DIR_OF_TRAVEL = 'dir_of_travel'
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ATTR_NEAREST = 'nearest'
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ATTR_FRIENDLY_NAME = 'friendly_name'
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_LOGGER = logging.getLogger(__name__)
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def setup(hass, config): # pylint: disable=too-many-locals,too-many-statements
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""" Get the zones and offsets from configuration.yaml. """
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ignored_zones = []
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if 'ignored_zones' in config[DOMAIN]:
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for variable in config[DOMAIN]['ignored_zones']:
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ignored_zones.append(variable)
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# Get the devices from configuration.yaml
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if 'devices' not in config[DOMAIN]:
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_LOGGER.error('devices not found in config')
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return False
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proximity_devices = []
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for variable in config[DOMAIN]['devices']:
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proximity_devices.append(variable)
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# Get the direction of travel tolerance from configuration.yaml
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tolerance = config[DOMAIN].get('tolerance', DEFAULT_TOLERANCE)
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# Get the zone to monitor proximity to from configuration.yaml
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proximity_zone = config[DOMAIN].get('zone', DEFAULT_PROXIMITY_ZONE)
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entity_id = DOMAIN + '.' + proximity_zone
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proximity_zone = 'zone.' + proximity_zone
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state = hass.states.get(proximity_zone)
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zone_friendly_name = (state.name).lower()
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# set the default values
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dist_to_zone = 'not set'
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dir_of_travel = 'not set'
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nearest = 'not set'
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proximity = Proximity(hass, zone_friendly_name, dist_to_zone,
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dir_of_travel, nearest, ignored_zones,
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proximity_devices, tolerance, proximity_zone)
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proximity.entity_id = entity_id
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proximity.update_ha_state()
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# Main command to monitor proximity of devices
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track_state_change(hass, proximity_devices,
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proximity.check_proximity_state_change)
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return True
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class Proximity(Entity): # pylint: disable=too-many-instance-attributes
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""" Represents a Proximity. """
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def __init__(self, hass, zone_friendly_name, dist_to, dir_of_travel,
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nearest, ignored_zones, proximity_devices, tolerance,
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proximity_zone):
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# pylint: disable=too-many-arguments
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self.hass = hass
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self.friendly_name = zone_friendly_name
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self.dist_to = dist_to
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self.dir_of_travel = dir_of_travel
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self.nearest = nearest
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self.ignored_zones = ignored_zones
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self.proximity_devices = proximity_devices
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self.tolerance = tolerance
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self.proximity_zone = proximity_zone
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@property
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def state(self):
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""" Returns the state. """
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return self.dist_to
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@property
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def unit_of_measurement(self):
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""" Unit of measurement of this entity. """
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return "km"
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@property
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def state_attributes(self):
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""" Returns the state attributes. """
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return {
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ATTR_DIR_OF_TRAVEL: self.dir_of_travel,
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ATTR_NEAREST: self.nearest,
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ATTR_FRIENDLY_NAME: self.friendly_name
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}
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def check_proximity_state_change(self, entity, old_state, new_state):
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# pylint: disable=too-many-branches,too-many-statements,too-many-locals
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""" Function to perform the proximity checking. """
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entity_name = new_state.name
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devices_to_calculate = False
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devices_in_zone = ''
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zone_state = self.hass.states.get(self.proximity_zone)
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proximity_latitude = zone_state.attributes.get('latitude')
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proximity_longitude = zone_state.attributes.get('longitude')
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# Check for devices in the monitored zone
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for device in self.proximity_devices:
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device_state = self.hass.states.get(device)
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if device_state.state not in self.ignored_zones:
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devices_to_calculate = True
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# Check the location of all devices
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if (device_state.state).lower() == (self.friendly_name).lower():
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device_friendly = device_state.name
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if devices_in_zone != '':
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devices_in_zone = devices_in_zone + ', '
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devices_in_zone = devices_in_zone + device_friendly
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# No-one to track so reset the entity
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if not devices_to_calculate:
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self.dist_to = 'not set'
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self.dir_of_travel = 'not set'
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self.nearest = 'not set'
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self.update_ha_state()
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return
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# At least one device is in the monitored zone so update the entity
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if devices_in_zone != '':
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self.dist_to = 0
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self.dir_of_travel = 'arrived'
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self.nearest = devices_in_zone
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self.update_ha_state()
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return
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# We can't check proximity because latitude and longitude don't exist
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if 'latitude' not in new_state.attributes:
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return
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# Collect distances to the zone for all devices
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distances_to_zone = {}
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for device in self.proximity_devices:
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# Ignore devices in an ignored zone
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device_state = self.hass.states.get(device)
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if device_state.state in self.ignored_zones:
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continue
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# Ignore devices if proximity cannot be calculated
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if 'latitude' not in device_state.attributes:
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continue
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# Calculate the distance to the proximity zone
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dist_to_zone = distance(proximity_latitude,
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proximity_longitude,
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device_state.attributes['latitude'],
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device_state.attributes['longitude'])
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# Add the device and distance to a dictionary
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distances_to_zone[device] = round(dist_to_zone / 1000, 1)
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# Loop through each of the distances collected and work out the closest
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closest_device = ''
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dist_to_zone = 1000000
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for device in distances_to_zone:
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if distances_to_zone[device] < dist_to_zone:
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closest_device = device
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dist_to_zone = distances_to_zone[device]
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# If the closest device is one of the other devices
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if closest_device != entity:
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self.dist_to = round(distances_to_zone[closest_device])
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self.dir_of_travel = 'unknown'
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device_state = self.hass.states.get(closest_device)
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self.nearest = device_state.name
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self.update_ha_state()
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return
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# Stop if we cannot calculate the direction of travel (i.e. we don't
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# have a previous state and a current LAT and LONG)
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if old_state is None or 'latitude' not in old_state.attributes:
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self.dist_to = round(distances_to_zone[entity])
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self.dir_of_travel = 'unknown'
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self.nearest = entity_name
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self.update_ha_state()
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return
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# Reset the variables
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distance_travelled = 0
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# Calculate the distance travelled
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old_distance = distance(proximity_latitude, proximity_longitude,
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old_state.attributes['latitude'],
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old_state.attributes['longitude'])
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new_distance = distance(proximity_latitude, proximity_longitude,
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new_state.attributes['latitude'],
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new_state.attributes['longitude'])
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distance_travelled = round(new_distance - old_distance, 1)
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# Check for tolerance
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if distance_travelled < self.tolerance * -1:
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direction_of_travel = 'towards'
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elif distance_travelled > self.tolerance:
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direction_of_travel = 'away_from'
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else:
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direction_of_travel = 'stationary'
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# Update the proximity entity
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self.dist_to = round(dist_to_zone)
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self.dir_of_travel = direction_of_travel
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self.nearest = entity_name
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self.update_ha_state()
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_LOGGER.debug('proximity.%s update entity: distance=%s: direction=%s: '
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'device=%s', self.friendly_name, round(dist_to_zone),
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direction_of_travel, entity_name)
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_LOGGER.info('%s: proximity calculation complete', entity_name)
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