gistfile1.txt

$DICTIONARY_FILE = "Main.old.strings"
$FILE_TO_TRANSLATE = "Main.strings"
$TRANSLATED_FILE = "Main.new.strings"

module StringsExtraction
  def self.extract_english_phrase line
    cleaned_up_line = line.delete "/*\n"
    tokens = cleaned_up_line.split(";")
    token_with_english_phrase = tokens[1]
    english_phrase = token_with_english_phrase.split(" = ")[1]
    english_phrase
  end
  def self.extract_japanese_translation line
    cleaned_up_line = line.delete(";\n")
    tokens = cleaned_up_line.split(" = ")
    japanese_translation = tokens[1]
    japanese_translation
  end
end

class TranslationFile
  def open(file_name)
    @file_name = file_name
    return self
  end

  def each
    file = File.open @file_name, 'r:utf-8'

    lines = file
      .readlines
      .reject { |line| line.start_with? "\n"}

    lines.each_slice(2) do |comment_line, translation_line|
      english_word = StringsExtraction.extract_english_phrase(comment_line)
      japanese_translation = StringsExtraction.extract_japanese_translation(translation_line)

      yield english_word, japanese_translation
    end

    file.close
  end

end

# Create dictionary
dictionary = {}
translation_file = TranslationFile.new
translation_file.open($DICTIONARY_FILE).each do |english_word, japanese_translation|
  dictionary[english_word.downcase] = japanese_translation
end


# Start translating the intended file
output_file = File.open($FILE_TO_TRANSLATE)
lines = output_file.readlines
translated_lines = lines.map do |line|
  if line.start_with? %{"}
    english_phrase = StringsExtraction.extract_japanese_translation line
    japanese_translation = dictionary[english_phrase.downcase]
    if japanese_translation
      tokens = line.split(" = ")
      tokens[1].gsub!(/"([^"]*)";/, %{#{japanese_translation};})
      tokens.join(" = ")
    else
      line
    end
  else
    line
  end
end

# Output the translated file as a new file
File.open($TRANSLATED_FILE, 'w:utf-8').write translated_lines.join