Import/Export translations - Tr8n Translation Engine

import_export_translations.rb

Steps to copy translations from Server A to Server B
------------------------------------------------------------------------

1) ssh to Server A
2) Execute -> rake tr8n:export_translations
    1) Rake will nullify synced_at column
    2) Rake will restart Memcached
    3) Rake will prompt you to enter a filename
    4) Rake will create a new filename.yml file inside your root directory.
3) scp this filename.yml from 'Server A' to 'Server B'
4) ssh to Server B
5) Execute -> rake tr8n:import_translations
    1) Rake will restart Memcached
    2) Rake will prompt you enter a filename
    3) Translations will be imported from the specified file
6) Done!


------------------------------------------------------------------------

namespace :tr8n do
  desc "Export translations into a file."
  task :export_translations => :environment do
    Tr8n::TranslationKey.update_all("synced_at = NULL")
    
    system("/etc/init.d/memcached restart")
    puts "Cleared cache data.."

    STDOUT.puts "Please enter filename(don't include extension) -> "
    filename = STDIN.gets.strip
  
    payload = []

    begin    
      Tr8n::TranslationKey.where("synced_at is null or updated_at > synced_at")
        .find_in_batches( :batch_size => 1000 ) do | changed_keys |
        changed_keys.each do |tkey|
          tkey_hash = tkey.to_sync_hash(:languages => Tr8n::Language.enabled_languages)
          payload << tkey_hash
          tkey.mark_as_synced!
          print "."
        end
      end
    ensure
      puts "Writing to file..."
      File.write("#{filename}.yml", payload.to_yaml)
      puts "Exported '#{Rails.root}/#{filename}.yml'"
    end
    puts "Done!"
  end

  desc "Import translations from a file."
  task :import_translations => :environment do
    system("sudo /etc/init.d/memcached restart")
    puts "Cleared cache data.."

    STDOUT.puts "Please enter filename(don't include extension) -> "
    filename = STDIN.gets.strip

    if  File.exist?("#{filename}.yml")
      translations = YAML::load_file "#{filename}.yml"
      translations.each do |tkey_hash|
        tkey, translations = Tr8n::TranslationKey.create_from_sync_hash(tkey_hash, Tr8n::Config.system_translator)
        tkey.mark_as_synced! if tkey.present?
        print "."
      end
      puts "Import completed."
      puts "Done!"
    else
      puts "File is not exist in the '#{Rails.root}/#{filename}.yml'"
    end
  end
end