[luci] changing theme at runtime

[Federico Fissore]

Hi everyone

I would like to customize luci so that when a first time user reaches 
it, a super simple panel is showed, with a custom branded theme

He/She can then switch to "advanced mode" and access all the settings

I've tried with this code (and a few others, but this is the last one)

function index()
  function prepare(page)
   require("luci.template").context.viewns.media = 
luci.config.themes.MyTheme
   return require("luci.dispatcher").template(page)
  end

  entry({"supersimple"}, prepare("index"), _("Super Simple Web Panel"), 
10).dependent=false
end

and it's complaining with "attempt to index field 'viewns' (a nil value)"

Any hint?

Thank you in advance

Federico