lib_pingyam.rb

class Converter
  def initialize(base_rom=0)
    @dict = read_dict(base_rom)
  end

  def convert_syllable(word, method, mods=nil)
    w = @dict[word.downcase]
    if w
      syllable = w[method]
      if mods
        get_modifications(syllable, mods)
      else
        method == 11 ? w : syllable
      end
    else
      word
    end
  end

  def read_dict(base_rom=0)
    pwd = Dir.pwd
    Dir.chdir(File.dirname(__FILE__))
    file = File.read("pingyam/pingyambiu")
    Dir.chdir(pwd)
    dict = {}
    file.each_line do |line|
      line_split = line.chomp.split("\t")
      dict[line_split[base_rom]] = line_split
    end
    dict
  end

  def convert_line(line, method, mods=nil)
    line_array = line.split(/\s+/)
    result = ""
    if method == 11
      11.times do |c|
        line_array.each do |word|
          result << convert_syllable(word, c, mods) + " "
        end
        result << "\n"
      end
    else
      line_array.each do |word|
        result << convert_syllable(word, method, mods) + " "
      end
    end
    result.gsub(/\s+\Z/, "")
  end

  def check_syllable(word)
    w = @dict[word.downcase]
    w ? true : false
  end

  def to_superscript(syllable)
    num_hash = {
      "1" => "¹", "2" => "²", "3" => "³",
      "4" => "⁴", "5" => "⁵", "6" => "⁶",
      "7" => "⁷", "8" => "⁸", "9" => "⁹"
    }
    syllable.gsub!(/([1-9])/) { |d| num_hash[d] }
  end

  def normalize_yale(syllable)
    num_hash = {
      "7" => "1", "8" => "3", "9" => "6"
    }
    syllable.gsub!(/([789])/) { |d| num_hash[d] }
  end

  def get_modifications(syllable, mods)
    normalize_yale(syllable) if mods[:yale]
    to_superscript(syllable) if mods[:superscript]
    syllable
  end
end