hash mapping

def self.to_google_params(params)
  def self.map_it(hash, mappings)
    sliced_hash = hash.slice(*mappings.keys)
    Hash[sliced_hash.map {|k, v| [mappings[k], v] }]
  end

  # Our style is exclude = true. Google's is include = true. So we need to invert the value.
  params[:privacy] = !params[:privacy] if params.has_key? :privacy

  {}.tap do |google_params|
    google_params = map_it(params,
      address: :primaryEmail,
      password: :password,
      privacy: :includeInGlobalAddressList,
      org_unit_path: :orgUnitPath
    )

    name_params = map_it(params, first_name: :givenName, last_name: :familyName)
    google_params[:name] = name_params if name_params.any?

    org_params = map_it(params, department: :department, title: :title)
    google_params[:organizations] = [org_params] if org_params.any?
  end
end