Deep config test

deep_config.rb

require 'active_support/all'

class RailsConfig
  class Options < ActiveSupport::OrderedOptions
    def initialize(value = nil)
      value.each_pair { |k, v| set_value k, v } if value.is_a?(Hash)
    end

    def method_missing(meth, *args)
      if meth =~ /=$/
        key = $`.to_sym
        value = args.first

        set_value key, value
      else
        self.fetch(meth) { super }
      end
    end

    private

    def set_value(key, value)
      if value.is_a?(Hash)
        value = self.class.new(value)
      end

      self[key] = value
    end
  end

  def initialize
    @options = ActiveSupport::OrderedOptions.new
  end

  def method_missing(meth, *args, &block)
    if meth =~ /=$/
      key = $`.to_sym
      value = args.first

      if value.is_a?(Hash)
        value = Options.new(value)
      end

      @options[key] = value
    else
      @options.fetch(meth) { @options[meth] = Options.new }
    end
  end
end

config = RailsConfig.new
config.payment_processing.schedule = :daily
config.payment_processing.retries  = 3
config.resque = { timeout: 60, inline_jobs: :always }
config.super_debugger = true
config.zomg = { foo: { bar: { baz: 'lol' } } }
config.lol

puts config.payment_processing.schedule # => :daily
puts config.payment_processing.retries  # => 3
puts config.resque.timeout              # => 60
puts config.resque.inline_jobs          # => :always
puts config.super_debugger              # => true
puts config.zomg.foo.bar                # => { baz: 'lol' }
puts config.zomg.foo.bar.baz            # => 'lol'
puts config.lol                         # => {}
# puts config.zomg.lol.raise