gistfile1.rb

require "java"
require "lib/vendor/libphonenumber-4.5.jar"
require "lib/vendor/offline-geocoder-1.9.jar"

class PhoneNumber
  US_DIALING_PREFIX = "011"
  US_COUNTRY_NAME   = "US"
  UNKNOWN           = "Unknown"

  import import java.util.Locale
  import com.google.i18n.phonenumbers.PhoneNumberUtil
  import com.google.i18n.phonenumbers.geocoding.PhoneNumberOfflineGeocoder

  attr_reader :number

  def initialize(number)
    @number = number
  end

  def locale
    locale = geocoder.get_description_for_number(parsed, Locale::ENGLISH)
    locale.size > 0 ? locale : UNKNOWN
  rescue com.google.i18n.phonenumbers.NumberParseException
    UNKNOWN
  end

  private

  def parsed
    @parsed ||= phone_number_util.parse(US_DIALING_PREFIX + number, US_COUNTRY_NAME)
  end

  def phone_number_util
    PhoneNumberUtil.get_instance
  end

  def geocoder
    PhoneNumberOfflineGeocoder.get_instance
  end
end

class PhoneNumberLocaleCounter
  attr_reader :counts

  def initialize(file_name)
    @file_name = file_name
    @numbers   = []
    @counts    = {}
  end

  def run
    read_file
    count
    counts.sort_by
  end

  private

  attr_reader :file_name, :numbers

  def read_file
    File.open(file_name) do |file|
      file.each_line do |line|
        add_number(line.strip[/[0-9]{7,}/])
      end
    end
  end

  def add_number(number)
    numbers << PhoneNumber.new(number)
  end

  def count
    numbers.each do |number|
      counts[number.locale] = counts[number.locale].to_i + 1
    end
  end
end

counter = PhoneNumberLocaleCounter.new("numbers.txt")
counter.run

counter.counts.sort_by { |count| -count.last }.each do |locale, count|
  puts "#{locale},#{count}"
end