convert rails locale files into one json

locale2json

#!/usr/bin/env ruby
#run in RAILS_ROOT directory

require 'json'
require 'yaml'

# http://stackoverflow.com/questions/9381553/ruby-merge-nested-hash
class ::Hash
  def deep_merge(second)
    merger = proc { |key, v1, v2| Hash === v1 && Hash === v2 ? v1.merge(v2, &merger) : v2 }
    self.merge(second, &merger)
  end
end

#dir = File.dirname __FILE__
dict = nil
Dir.glob("./config/locales/**/*.yml").each do |yml|
  yml = YAML.load File.open(yml).read
  dict = dict ? dict.deep_merge(yml) : yml
end

def translatePlaceholder(v)
  if v.respond_to? :each
    if v.is_a? Array
      v.each {|v| translatePlaceholder(v)}
    else
      v.each {|k, v| translatePlaceholder(v)}
    end
  else
    v && v.is_a?(String) && v.gsub!(/%{(\w+)}/, '{{\1}}')
  end
end

translatePlaceholder(dict)

locale = ARGV.shift
if locale
  puts JSON.pretty_generate dict[locale]
else
  puts JSON.pretty_generate dict
end