class ActionDispatch::Routing::RoutesProxy

:nodoc:

def initialize(routes, scope, helpers, script_namer = nil) 

def initialize(routes, scope, helpers, script_namer = nil)
  @routes, @scope = routes, scope
  @helpers = helpers
  @script_namer = script_namer
end

def merge_script_names(previous_script_name, new_script_name)

script name resolver for the mount point dependent part.
about since it depends on the specific request, but use our
context via ENV["SCRIPT_NAME"], which `mount` doesn't know
Keeps the part of the script name provided by the global 
def merge_script_names(previous_script_name, new_script_name)
  return new_script_name unless previous_script_name
  resolved_parts = new_script_name.count("/")
  previous_parts = previous_script_name.count("/")
  context_parts = previous_parts - resolved_parts + 1
  (previous_script_name.split("/").slice(0, context_parts).join("/")) + new_script_name
end

def method_missing(method, *args) 

def method_missing(method, *args)
  if @helpers.respond_to?(method)
    options = args.extract_options!
    options = url_options.merge((options || {}).symbolize_keys)
    if @script_namer
      options[:script_name] = merge_script_names(
        options[:script_name],
        @script_namer.call(options)
      )
    end
    args << options
    @helpers.public_send(method, *args)
  else
    super
  end
end

def respond_to_missing?(method, _) 

def respond_to_missing?(method, _)
  super || @helpers.respond_to?(method)
end

def url_options 

def url_options
  scope.send(:_with_routes, routes) do
    scope.url_options
  end
end