# encoding: utf-8
require "mongoid/timestamps/updated/short"

module Mongoid
  module Timestamps
    # This module handles the behaviour for setting up document updated at
    # timestamp.
    module UpdatedInt
      extend ActiveSupport::Concern

      included do
        include Mongoid::Timestamps::Timeless

        field :updated_at, type: Integer
        set_callback :create, :before, :set_updated_at
        set_callback :update, :before, :set_updated_at
      end

      # Update the updated_at field on the Document to the current time.
      # This is only called on create and on save.
      #
      # @example Set the updated at time.
      #   person.set_updated_at
      def set_updated_at
        if able_to_set_updated_at?
          self.updated_at = Time.now.utc.to_i unless updated_at_changed?
        end

        clear_timeless_option
      end

      # Is the updated timestamp able to be set?
      #
      # @example Can the timestamp be set?
      #   document.able_to_set_updated_at?
      #
      # @return [ true, false ] If the timestamp can be set.
      #
      # @since 2.4.0
      def able_to_set_updated_at?
        !frozen? && !timeless? && (new_record? || changed?)
      end
    end
  end
end
