repr.rb

  module Settings
    DISCRIMINATOR = :type_name

    TYPE_TO_CLASS = Hash[Setting.subclasses.map { |klass| [klass.type_name.to_s, klass] }].freeze

    class SettingRepresenter < Representable::Decorator
      include ::Representable::JSON

      property :name
      property DISCRIMINATOR, skip_parse: true
    end

    class MetaRepresenter < Representable::Decorator
      include ::Representable::JSON

      representer_selector = lambda |options| { # Irrelevant }

      class_selector = lambda do |options|
        type = options[:input][DISCRIMINATOR.to_s]
        TYPE_TO_CLASS[type] || ::Theme::Settings::Setting
      end

      collection :groups, class: Group do
        property :title
        collection :sub_groups, class: SubGroup do
          property :title
          collection :settings, decorator: representer_selector, class: class_selector
        end
      end
    end
  end