module Roda::RodaPlugins::Sessions::RequestMethods

def persist_session(headers, session)
  opts = roda_class.opts[:sessions]
  if session.empty?
    if env[SESSION_SERIALIZED]
      # If session was submitted and is now empty, remove the cookie
      Rack::Utils.delete_cookie_header!(headers, opts[:key])
    # else
      # If no session was submitted, and the session is empty
      # then there is no need to do anything
    end
  elsif cookie_value = _serialize_session(session)
    cookie = Hash[opts[:cookie_options]]
    cookie[:value] = cookie_value
    cookie[:secure] = true if !cookie.has_key?(:secure) && ssl?
    Rack::Utils.set_cookie_header!(headers, opts[:key], cookie)
  end
  
  if env[SESSION_DELETE_RACK_COOKIE]
    Rack::Utils.delete_cookie_header!(headers, opts[:upgrade_from_rack_session_cookie_key], opts[:upgrade_from_rack_session_cookie_options])
  end
  nil
end