Allow printcollection to filter by tags

[mschneiderwng]

I have exercises about some topic. Some are optional, some are mandatory. I would like to print the mandatory first, then the optional. The current workflow is as follows:

\documentclass[a4paper]{article}
\usepackage[use-aux=false]{xsim}

\DeclareExerciseTagging{optional}
\DeclareExerciseCollection[topics=algebra, optional=true]{algebra-optional}
\DeclareExerciseCollection[topics=algebra, optional=false]{algebra-mandatory}

\xsimsetup{collect}

\begin{filecontents}{exercises.tex}
    \begin{exercise}[topics=algebra, optional=true]
        a algebra question 1 optional=true
    \end{exercise}
    \begin{exercise}[topics=calculus, optional=false]
        calculus question 1 optional=false
    \end{exercise}
    \begin{exercise}[topics=algebra, optional=false]
        algebra question 2 optional=false
    \end{exercise}
\end{filecontents}

\begin{document}
% collect
\collectexercises{algebra-mandatory}
\input{exercises.tex}
\collectexercisesstop{algebra-mandatory}
\collectexercises{algebra-optional}
\input{exercises.tex}
\collectexercisesstop{algebra-optional}

\section{Mandatory}
\printcollection{algebra-mandatory}

\section{Optional}
\printcollection{algebra-optional}

\end{document}

Would it be possible to add a filter to \printcollection, such that the interface something like in the following example?

\documentclass[a4paper]{article}
\usepackage[use-aux=false]{xsim}

\DeclareExerciseTagging{optional}
\DeclareExerciseCollection[topics=algebra]{algebra}

\xsimsetup{collect}

\begin{filecontents}{exercises.tex}
    \begin{exercise}[topics=algebra, optional=true]
        a algebra question 1 optional=true
    \end{exercise}
    \begin{exercise}[topics=calculus, optional=false]
        calculus question 1 optional=false
    \end{exercise}
    \begin{exercise}[topics=algebra, optional=false]
        algebra question 2 optional=false
    \end{exercise}
\end{filecontents}

\begin{document}
\collectexercises{algebra}
\input{exercises.tex}
\collectexercisesstop{algebra}

\section{Mandatory}
\printcollection[filter={optional=false}]{algebra}

\section{Optional}
\printcollection[filter={optional=true}]{algebra}
\end{document}