module Traitorous
  module Converter
    # The Model converter is used a a simple way to instantiate an object from
    #   the model_class using the imported opts, and which will call .export on
    #   the data.
    #
    # This converter can be used when you have a set of opts that you can pass
    #   to a classes .new command in order to instantiate an object.
    class Model
      # @param model_klass [Class,#new] class to instantiate when importing
      def initialize(model_klass)
        @model_klass = model_klass
      end

      # do_export is called in order to take an existing piece of data and
      #   prepare it to be written to a simpler data structure.
      #
      # The model converter exports the data by calling .export on it
      #
      # @params data [Object] the data object passed in to be exported
      # @return [Object] result of data.export
      def do_export(data)
        data.export
      end

      # do_import is called in order to take some opts and to turn them into
      #   instantiated objects, arrays, or other types of transformation
      #
      # The model converter imports the opts by instantiating a model_class
      #   object with it.
      #
      # @params opts [Object] the options to be exported
      # @return [Object] result of model_klass.new(opts)
      def do_import(opts)
        @model_klass.new(opts)
      end
    end
  end
end