Params

Params are modules that convert user provided input into rigid shapes used by middleware. Params have a 1:1 mapping to Smithy shapes.

Param modules will initialize Types and set members if they exist. Params will do lightweight validation (using Hearth::Validator) for aggregate structures, such as Array, Hash, and Set, so that values can be iterated over.

module HighScoreService
  # @api private
  module Params

    class HighScoreParams
      def self.build(params, context:)
        Hearth::Validator.validate_types!(params, ::Hash, Types::HighScoreParams, context: context)
        type = Types::HighScoreParams.new
        Hearth::Validator.validate_unknown!(type, params, context: context) if params.is_a?(Hash)
        type.game = params[:game]
        type.score = params[:score]
        type
      end

    end
  end
end