module Line
  module Bot
    module MessageBuilder
      class Action::Postback < Action
        attr_accessor :label, :data, :display_text

        def initialize(label: nil, data: nil, display_text: nil)
          super 'postback' do
            @label = label
            @data = data
            @display_text = display_text
            yield self if block_given?
          end
        end

        def self.required
          {
            'type' => String,
            'label' => String,
            'data' => String
          }
        end
      end
    end
  end
end