Automatic enumerate list using eastern Arabic letters in beamer

Question

Consider the MWE below:

MWE

\documentclass{beamer-rl}
\babelprovide[import=ar, main,mapdigits]{arabic}

\usepackage{enumitem}

\usetheme{CambridgeUS}

\title{مثال تجريبي}
\subtitle{نموذج}
\begin{document}

\section{اليوم الاول}
\subsection{مقدمة}

\begin{frame}
  \frametitle{لمحة تاريخية}
  \begin{enumerate}[label*=\arabic*.]
  \item الجملة الاولى
  \item الجملة الثانية
    \begin{enumerate}
    \item[ا.] تفرع اول
    \item[ب.] تفرع ثاني
    \item[جـ.] تفرع ثالث
    \end{enumerate}
  \item الجملة الثانية
  \end{enumerate}
\end{frame}

\end{document}

%%% Local Variables:
%%% mode: latex
%%% TeX-engine: luatex
%%% TeX-master: t
%%% End:

Output

Question

I need to get the same output in Beamer without entering the sub-items manually (ا، ب، ج، د) these are the Hindi eastern Arabic letters, how to achieve that by having enumitem package generate that automatically just as the numbers, i.e. I don't want to put the letters by myself each time I have subitems list especially when the list is actually a long one. How to do that?

Note

tex engine is luatex

Answer 1

If things haven't changed, enumitem is not compatible with beamer. But the latter provides tools to configure lists. (Well, the 3rd item has a tatweel, while the default abjad doesn't, so I've added to \babelprovide an option to redefine it.)

\documentclass{beamer-rl}
\babelprovide[import, main,
 mapdigits,
 counters/abjad = ا ب جـ د ه‍ و
 ]{arabic}

\usetheme{CambridgeUS}
\setbeamertemplate{enumerate item}{\arabic{enumi}.}
\setbeamertemplate{enumerate subitem}{\localecounter{abjad}{enumii}.}

\title{مثال تجريبي}
\subtitle{نموذج}

\begin{document}

\section{اليوم الاول}
\subsection{مقدمة}

\begin{frame}
  \frametitle{لمحة تاريخية}
  \begin{enumerate}
  \item الجملة الاولى
  \item الجملة الثانية
    \begin{enumerate}
    \item تفرع اول
    \item تفرع ثاني
    \item تفرع ثالث
    \end{enumerate}
  \item الجملة الثانية
  \end{enumerate}
\end{frame}

\end{document}