Module:GetUniverse

local p = {}

local GetUniverseData = mw.loadData( 'Module:GetUniverse/data' )

function p.GetUniverse( frame )
   local key = (frame.args[1] or '')
   if key == '' then -- input was blank or not defined.
      return -- return nothing.
   end
   local universe = GetUniverseData[key]
   if not universe then -- key not in data, add tracking cat.
      return key .. '[[Category:Needs valid universe]]'
   end
   return universe  -- valid universe, don't add tracking cat.
end

return p