module ReactOnRails::Locales

def self.check_config_directory_exists(directory:, key_name:, remove_if:)
  return if directory.nil?
  return if Dir.exist?(directory)
  msg = <<~MSG
    Error configuring /config/initializers/react_on_rails.rb: invalid value for `#{key_name}`.
    Directory does not exist: #{directory}. Set to value to nil or comment it
    out if #{remove_if}.
  MSG
  raise ReactOnRails::Error, msg
end

def self.compile(force: false)
  config = ReactOnRails.configuration
  check_config_directory_exists(
    directory: config.i18n_dir, key_name: "config.i18n_dir",
    remove_if: "not using the React on Rails i18n feature"
  )
  check_config_directory_exists(
    directory: config.i18n_yml_dir, key_name: "config.i18n_yml_dir",
    remove_if: "not using this i18n with React on Rails, or if you want to use all translation files"
  )
  if config.i18n_output_format&.downcase == "js"
    ReactOnRails::Locales::ToJs.new(force: force)
  else
    ReactOnRails::Locales::ToJson.new(force: force)
  end
end