Han Transition Wrapper in Ruby

transition.rb

require "active_support/all"
require "forwardable"

class Transition
  extend Forwardable
  def_delegators :params, :to_query, :to_json

  def initialize(han_transition)
    @han_transition = han_transition.symbolize_keys
    @params = han_transition[:params].symbolize_keys
  end

  def to_get
    [href, to_query].join("?")
  end

  alias_method :to_post, :to_json

  def method_missing(name, *args)
    return super unless respond_to?(name)
    han_transition[name.to_sym]
  end

  def respond_to?(name)
    return true if han_transition.has_key?(name.to_sym)
    super
  end

  private

  attr_reader :han_transition, :params
end

usage.rb

han_transition = {
  type: "hard",
  name: "foobar",
  href: "http://somewhere.com/api/v3/foobar",
  verbs: ["GET"],
  headers: [],
  formats: ["json"],
  params: {
    foo: true,
    bar: "some value",
    list: [1,2,3],
    obj: { nested: { deep: true } }
  },
  examples: {}
}

t = Transition.new(han_transition)
t.name # => "foobar"
t.to_get # => "http://somewhere.com/api/v3/foobar?bar=some+value&foo=true&list%5B%5D=1&list%5B%5D=2&list%5B%5D=3&obj%5Bnested%5D%5Bdeep%5D=true"
t.to_post # => "{\"foo\":true,\"bar\":\"some value\",\"list\":[1,2,3],\"obj\":{\"nested\":{\"deep\":true}}}"