require 'yaml'

module PaperTrail
  module Serializers
    module YAML
      extend self # makes all instance methods become module methods as well

      def load(string)
        ::YAML.load string
      end

      def dump(object)
        ::YAML.dump object
      end

      # Returns a SQL condition to be used to match the given field and value in
      # the serialized object.
      def where_object_condition(arel_field, field, value)
        arel_field.matches("%\n#{field}: #{value}\n%")
      end
    end
  end
end