class Rack::App::Middlewares::Params::Definition
  require 'rack/app/middlewares/params/definition/options'

  def initialize(&descriptor)
    @required = {}
    @optional = {}
    instance_exec(&descriptor)
  end

  def required(params_key, options)
    @required[params_key.to_s] = self.class::Options.new(options).formatted
  end

  def optional(params_key, options)
    @optional[params_key.to_s] = self.class::Options.new(options).formatted
  end

  def to_descriptor
    { :required => @required, :optional => @optional }
  end
end