mirror of
https://github.com/home-assistant/core
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59 lines
1.6 KiB
Python
59 lines
1.6 KiB
Python
"""
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homeassistant.util.location
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Module with location helpers.
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"""
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import collections
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import requests
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from vincenty import vincenty
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ELEVATION_URL = 'http://maps.googleapis.com/maps/api/elevation/json'
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LocationInfo = collections.namedtuple(
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"LocationInfo",
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['ip', 'country_code', 'country_name', 'region_code', 'region_name',
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'city', 'zip_code', 'time_zone', 'latitude', 'longitude',
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'use_fahrenheit'])
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def detect_location_info():
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""" Detect location information. """
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try:
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raw_info = requests.get(
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'https://freegeoip.net/json/', timeout=5).json()
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except requests.RequestException:
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return
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data = {key: raw_info.get(key) for key in LocationInfo._fields}
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# From Wikipedia: Fahrenheit is used in the Bahamas, Belize,
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# the Cayman Islands, Palau, and the United States and associated
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# territories of American Samoa and the U.S. Virgin Islands
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data['use_fahrenheit'] = data['country_code'] in (
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'BS', 'BZ', 'KY', 'PW', 'US', 'AS', 'VI')
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return LocationInfo(**data)
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def distance(lat1, lon1, lat2, lon2):
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""" Calculate the distance in meters between two points. """
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return vincenty((lat1, lon1), (lat2, lon2)) * 1000
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def elevation(latitude, longitude):
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""" Return elevation for given latitude and longitude. """
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req = requests.get(ELEVATION_URL, params={
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'locations': '{},{}'.format(latitude, longitude),
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'sensor': 'false',
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})
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if req.status_code != 200:
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return 0
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try:
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return int(float(req.json()['results'][0]['elevation']))
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except (ValueError, KeyError):
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return 0
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