Moodle package. Problem with definitions and environments

Question

I'm compiling this simple quiz under LaTex TexShop 4.27

\documentclass[12pt]{article}
\usepackage{moodle}
\def\EN{{\bf A}}
\def\XV{3}
\def\YV{4}
%---------------------------
\begin{document}
\begin{quiz}{MyQuiz}
\begin{essay}{Question A}
Report on study case \EN\  with numerical values:
\begin{center}
\begin{tabular}{|c|c|} \hline
     $x$ & $y$  \\ \hline
     \XV & \YV  \\ \hline
\end{tabular}
\end{center}
  \item Case \EN\  with numerical values \XV,\YV
\end{essay}
\end{quiz}
\end{document}

and I get a nice pdf file. But inside the moodle.xml file the defined values don't appear anywhere and the body of the question is:

<text><![CDATA[<p>Report on study case \EN  with numerical values: <CENTER>\begin {tabular}{|c|c|} \hline \(x\) & \(y\) <BR/> \hline \XV & \YV <BR/> \hline \end {tabular}</CENTER> </p>]]></text>

producing this ugly result inside moodle:

What is happening with my definitions and the tabular environment ?.

Answer 1

This is what the package moodle documentation says; in particular, neither tabular nor your personal commands are supported.

Answer 2

If you really need a tabular, the best solution I can see is to pack it into an image. For instance, see this answer.

However, for your macros, I figured out there is an undocumented utility to declare them for expansion by the package before writing in the XML file : \htmlregister. In your case, just place at the end of the preamble:

\def\EN{{\bf A}}
\def\XV{3}
\def\YV{4}
\htmlregister{\EN}
\htmlregister{\XV}
\htmlregister{\YV}

In a development version of the package, I introduced the command \moodleregisternewcommands which triggers the expansion of all macros subsequently defined using \newcommand (and the likes). See this fixed issue. In this case, the use is:

\moodleregisternewcommands
\newcommand{\EN}{{\bf A}}
\newcommand{\XV}{3}
\newcommand{\YV}{4}