台灣住址行政區域分類

gistfile1.rb

class TaiwaneseAddress
  def initialize(address)
    @original_address = address.clone()

    @levels = prepare_level()

    @levels.each do |level|
      level.keys.each do |region|
        if match = address[/^(.{1,4}#{region})/,1]
          level[region] = match
          address.gsub!(match,'')
          address.strip!
        end
      end
    end

    @road_address = address
  end

  # 顯示地址，隱藏指定級數以下的行政區域
  # 預設隱藏四級以下。
  def hide_region_below_level(level = 4)
    new_address = ""
    @levels.first(level - 1).each do |level|
      level.values.each do |match|
        next if match.blank?
        new_address << match
      end
    end
    new_address << @road_address
  end

private

  def prepare_level
    levels = []
    levels[0] = %w{省 市}
    levels[1] = %w{縣 市}
    levels[2] = %w{鄉 鎮 市 區}
    levels[3] = %w{村 里}
    levels[4] = %w{鄰}
    levels.map! do |level|
      Hash[level.map {|x| [x, nil]}]
    end
  end
end