lib/telephone_number/time_zone_detector.rb
module TelephoneNumber
class TimeZoneDetector
attr_reader :phone_number, :timezone
def initialize(phone_number)
@phone_number = phone_number
end
def detect_timezone
normalized_number = build_normalized_number.dup
timezone = nil
(normalized_number.length - 2).times { break if timezone = data[normalized_number.chop!] }
timezone.to_s.split('&').join(', ')
end
def data
@data ||= Marshal.load(File.binread(File.expand_path('../../../data/timezones/map_data.dat', __FILE__)))
end
private
# Google's geocoding data is odd in that it uses a non-standard format for lookups
# on countries that have a mobile token. While I don't believe that this is used right now
# it will be if/when Google adds more specific data for Argentina. This method safe guards
# against that.
def build_normalized_number
return phone_number.e164_number(formatted: false) unless mobile_token = phone_number.country.mobile_token
if phone_number.parser.normalized_number.start_with?(mobile_token)
phone_number.e164_number(formatted: false).sub(mobile_token, '')
else
phone_number.e164_number(formatted: false)
end
end
end
end