# If you include this module in an instance of a Hash, it will allow you to
# get at any of its values by method name rather than hashy key syntax.
#
# It will also inject itself on any hashes returned as a value.
#
# Also, if there's a value_for method on the instance, it will do pretty mapping
# for the methods.
module HashChainMethodizer
  def method_missing(method, *args, &block)
    if respond_to?(:value_for) && value_for.has_key?(method.to_sym)
      self[value_for[method.to_sym]]
    elsif has_key?(method.to_sym)
      val = self[method.to_sym]
      if val.is_a?(Hash)
        val.extend(HashChainMethodizer)
      end
      return val
    else
      super
    end
  end
end