dtaniwaki/e2e-tester

module SerializedAttribute
  extend ActiveSupport::Concern

  included do
    serialize :data, JSON
  end

  module ClassMethods
    def serialized_attribute_keys
      @serialized_attribute_keys ||= Set.new
    end

    def serialized_attribute(*names)
      options = names.extract_options!
      names.each do |name|
        name = name.to_s
        serialized_attribute_keys << name
        define_method name do
          self.data ||= {}
          value = self.data[name]
          case options[:type]
          when :float
            value.to_f
          when :integer
            value.to_i
          else
            value.to_s
          end
        end
        define_method "#{name}=" do |value|
          self.data ||= {}
          value = case options[:type]
                  when :float
                    value.to_f
                  when :integer
                    value.to_i
                  else
                    value.to_s
          end
          self.data[name] = value
        end
      end
    end
  end
end