CarLicenseNunber.rb

#!/usr/bin/env ruby 

module CarLicenseNumber
  

  def area_code_list
    [["北海道", 10],
     ["東北地方", 20],
     ["東京都", 30],
     ["関東甲信越", 40],
     ["北部中部", 50],
     ["近畿", 60],
     ["中国", 70],
     ["四国", 80],
     ["九州", 90]]
  end
  def pref_code_list 
    [
      ["北海道本部","10"],
      ["函館","11"],
      ["旭川","12"],
      ["釧路","13"],
      ["北見","14"],
      ["青森","20"],
      ["岩手","21"],
      ["宮城","22"],
      ["秋田","23"],
      ["山形","24"],
      ["福島","25"],
      ["東京","30"],
      ["茨城","40"],
      ["栃木","41"],
      ["群馬","42"],
      ["埼玉","43"],
      ["千葉","44"],
      ["神奈川","45"],
      ["新潟","46"],
      ["山梨","47"],
      ["長野","48"],
      ["静岡","49"],
      ["富山","50"],
      ["石川","51"],
      ["福井","52"],
      ["岐阜","53"],
      ["愛知","54"],
      ["三重","55"],
      ["滋賀","60"],
      ["京都","62"],
      ["大阪","61"],
      ["兵庫","63"],
      ["奈良","64"],
      ["和歌山","65"],
      ["鳥取","70"],
      ["島根","71"],
      ["岡山","72"],
      ["広島","73"],
      ["山口","74"],
      ["徳島","80"],
      ["香川","81"],
      ["愛媛","82"],
      ["高知","83"],
      ["福岡","90"],
      ["佐賀","91"],
      ["長崎","92"],
      ["熊本","93"],
      ["大分","94"],
      ["宮崎","95"],
      ["鹿児島","96"],
      ["沖縄","97"]
    ].inject({}){|ret,e| ret[e[1]] = e[0] ;ret }
  end
  def parse( card_number )
    raise "免許証番号は１２桁" if (card_number =~ /[0-9]{12}/).nil?

    year = card_number.chars[2,2].join.to_i
    if year <= 50
      year=year+2000 
    else
      year=year+1900 if year > 50
    end    
    {
      "発行都道府県" => pref_code_list[card_number.chars[0,2].join],
      "免許取得年" => year,
      "再発行回数"   => card_number.chars.last.to_i,
      "チェックデジット" => check_digit(card_number)

    }

  end
  def check_digit( card_number )
    num = card_number.chars[0,10].map{|e| e.to_i }
    x = [5, 4, 3, 2, 7, 6, 5, 4, 3, 2].zip(num).map{|e| e[0]*e[1] }.inject(0){|ret,e| ret=ret+e }
    y = 11-(x%11)
    (card_number[10].to_i == y ) ? "OK" : "NG"
  end

  module_function :parse,:pref_code_list,:check_digit


end





if $0 == __FILE__ then 

	cln = CarLicenseNumber
  p cln.parse("621400099920")
  
end