class Timezone::Lookup::Geonames
@!visibility private
Constants
- NO_TIMEZONE_INFORMATION
Status code used by GeoNames to indicate that the lookup succeeded, but there is no timezone information for the given <lat, lng>. This can happen if the <lat, lng> resolves to a point in the middle of the ocean, for example.
Public Class Methods
new(config)
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Calls superclass method
Timezone::Lookup::Basic::new
# File lib/timezone/lookup/geonames.rb, line 18 def initialize(config) if config.username.nil? raise(::Timezone::Error::InvalidConfig, 'missing username') end config.protocol ||= 'http' config.url ||= 'api.geonames.org' super end
Public Instance Methods
lookup(lat, long)
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# File lib/timezone/lookup/geonames.rb, line 29 def lookup(lat, long) response = client.get(url(lat, long)) return unless response.body data = JSON.parse(response.body) timezone_id = get_timezone_id(data) return timezone_id if timezone_id return unless data['status'] return if NO_TIMEZONE_INFORMATION == data['status']['value'] raise(Timezone::Error::GeoNames, data['status']['message']) rescue StandardError => e raise(Timezone::Error::GeoNames, e.message) end
Private Instance Methods
get_timezone_id(data)
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# File lib/timezone/lookup/geonames.rb, line 50 def get_timezone_id(data) return data['timezoneId'] if data['timezoneId'] return unless config.offset_etc_zones return unless data['gmtOffset'] return unless data['gmtOffset'].is_a? Numeric return 'Etc/UTC' if data['gmtOffset'].zero? "Etc/GMT#{format('%+d', -data['gmtOffset'])}" end
url(lat, long)
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# File lib/timezone/lookup/geonames.rb, line 61 def url(lat, long) query = URI.encode_www_form( 'lat' => lat, 'lng' => long, 'username' => config.username ) "/timezoneJSON?#{query}" end