version.rb

module PersonHub
  module Extensions
    module Version extend self
      CURRENT_API_VERSION = '2015-04-30'

      def registered(app)
        app.set(:version) do |value|
          condition { request_api_version >= value }
        end

        app.helpers Helpers
      end

      module Helpers
        def request_api_version
          header_api_version || account_api_version
        end

        def header_api_version
          env['HTTP_API_VERSION']
        end

        def account_api_version
          if current_account.person_api_version.blank?
            current_account.update_all(person_api_version: CURRENT_API_VERSION)
          end

          current_account.person_api_version
        end
      end
    end
  end
end