Contents

require 'yaml'

module TaxJp
  class Gengou
    @@_gengou = TaxJp::Utils.load_yaml('元号.yml')
  
    def self.to_seireki(gengou, year_jp)
      target_gengou = nil
      @@_gengou.invert.keys.each do |start_gengou|
        if start_gengou == gengou.to_s
          target_gengou = start_gengou
          break
        end
      end
      
      return nil unless target_gengou
      
      start_year = @@_gengou.invert[target_gengou].to_i
      return (start_year + year_jp.to_i - 1).to_s
    end
  
    def self.to_wareki(year)
      return nil unless year.present?
  
      target_year = nil
      @@_gengou.keys.sort.each do |start_year|
        break if start_year.to_i > year.to_i
        target_year = start_year
      end
      
      return nil unless target_year
  
      gengou  = @@_gengou[target_year]
      year_jp  = year - target_year + 1
  
      return gengou + (year_jp == 1 ? '元' : year_jp.to_s)
    end

  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
tax_jp-0.3.6	lib/tax_jp/gengou.rb
tax_jp-0.3.5	lib/tax_jp/gengou.rb
tax_jp-0.3.4	lib/tax_jp/gengou.rb
tax_jp-0.3.3	lib/tax_jp/gengou.rb
tax_jp-0.3.2	lib/tax_jp/gengou.rb