\directlua
{
  class                                 =   "slides"
  fontSize                              =   "10pt"
}
\input{\source/code/common}
\input{\source/code/slides}

\newcommand{\theSlides}[9][tuc]
{
  %1 – Fakultät
  %2 – title
  %3 – subtitle
  %4 – author
  %5 – date
  %6 – logo
  %7 – before document
  %8 – content
  %9 – appendix
  \directlua
  {
    fakultaet = "#1"
  }
  \usepackage{\source/tuc/source/beamerthemetuc2014}
  \mode<article>{\usepackage{\source/tuc/source/beamerarticletuc2014}}
  \title{#2}
  \subtitle{#3}
  \author{#4}
  \date{#5}
  %\makeglossaries
  #7
  \setbeameroption{\directlua{if hazDualScreen then tex.print([[show notes on second screen]]) end}}
  \setbeamertemplate{note page}[plain]
  \beamertemplatenavigationsymbolsempty
  \begin{document}
    \robfamily
    %\let\oldprintslidenumber=\printslidenumber
    %\renewcommand{\printslidenumber}[2]{\oldprintslidenumber{1}{1337}}
    %\begingroup
      %\section*{Titelseite}%\bookmarkthis
      \setbeamertemplate{tuc2 headlines}[title]
      \frame{\titlepage #6}
      \setbeamertemplate{tuc2 headlines}[section]
    %\endgroup
    %\let\printslidenumber=\oldprintslidenumber
    \newcommand{\slide}[4][t]
    {
      \begin{frame}[##1]
        \ifthenelse{\isempty{##2}}{}{\frametitle{##2}}
        \ifthenelse{\isempty{##3}}{}{\framesubtitle{##3}}
        ##4
      \end{frame}
    }
    #8
    \renewcommand{\printslidenumber}[2]{Extra}
    \renewcommand{\slide}[4][t]
    {
      \begin{frame}[noframenumbering,##1]
        \ifthenelse{\isempty{##2}}{}{\frametitle{##2}}
        \ifthenelse{\isempty{##3}}{}{\framesubtitle{##3}}
        ##4
      \end{frame}
    }
    \section*{Extra}%\bookmarkthis
    #9
  \end{document}
}