gistfile1.rb

  desc "Apply Google translate to auto translate all texts in locale ENV['FROM'] to locale ENV['TO']"
  task :google => :environment do
    raise "Please specify FROM and TO locales as environment variables" if ENV['FROM'].blank? || ENV['TO'].blank?

    # Depends on httparty gem
    # http://www.robbyonrails.com/articles/2009/03/16/httparty-goes-foreign
    class GoogleApi
      include HTTParty
      base_uri 'ajax.googleapis.com'
      def self.translate(string, to, from)
        tries = 0
        begin
          get("/ajax/services/language/translate",
            :query => {:langpair => "#{from}|#{to}", :q => string, :v => 1.0},
            :format => :json)
        rescue 
          tries += 1
          puts("SLEEPING - retrying in 5...")
          sleep(5)
          retry if tries < 10
        end
      end
    end

    I18n.backend.send(:init_translations)

    start_at = Time.now
    translations = {}
    Translate::Keys.new.i18n_keys(ENV['FROM']).each do |key|
      from_text = I18n.backend.send(:lookup, ENV['FROM'], key).to_s
      to_text = I18n.backend.send(:lookup, ENV['TO'], key)
      if !from_text.blank? && to_text.blank?
        print "#{key}: '#{from_text[0, 40]}' => "
        if !translations[from_text]
          response = GoogleApi.translate(from_text, ENV['TO'], ENV['FROM'])
          translations[from_text] = response["responseData"] && response["responseData"]["translatedText"]
        end
        if !(translation = translations[from_text]).blank?
          translation.gsub!(/\(\(([a-z_.]+)\)\)/i, '{{\1}}')
          # Google translate sometimes replaces {{foobar}} with (()) foobar. We skip these
          if translation !~ /\(\(\)\)/
            puts "'#{translation[0, 40]}'"
            I18n.backend.store_translations(ENV['TO'].to_sym, Translate::Keys.to_deep_hash({key => translation}))
          else
            puts "SKIPPING since interpolations were messed up: '#{translation[0,40]}'"
          end
        else
          puts "NO TRANSLATION - #{response.inspect}"
        end
      end
    end
    
    puts "\nTime elapsed: #{(((Time.now - start_at) / 60) * 10).to_i / 10.to_f} minutes"    
    Translate::Storage.new(ENV['TO'].to_sym).write_to_file
  end