translate.rb

# All translation key-value pair must be have String datatype as key

require 'fileutils'

dir = '/Users/liren/Desktop'
SOURCE_LANG = 'EN'
LANGS = ['ID', 'MS', 'TH', 'ZH']

def translate(file_path, lang)
  lines = IO.readlines(file_path).map do |line|
    p line
    line.gsub(/(.+:\s?['"])(.+)(['"],?)/, '\1[' + lang + '] \2\3')
  end
  File.open(file_path, 'w') do |file|
    file.puts lines
  end
end

LANGS.each do |lang|
  lang_folder = "#{dir}/#{lang}"
  FileUtils.copy_entry "#{dir}/#{SOURCE_LANG}", lang_folder

  Dir["#{lang_folder}/*.js"].each do |file|
    translate(file, lang)
  end
end