Modul:Archivbot

local p = { }

p.getdate = function ( frame )

   local stamp = frame.args[1]
   local date
   if stamp:match( "^20[12]%d%-[0-1]%d%-[0-3]%d" ) then
       date = stamp:match("^20[12]%d%-[0-1]%d")
   else
       date = "ohne Datum"
   end
   return date or ""

end -- p.getdate

return p