[NTG-context] command to process CSV file (database module)

[NTG-context] command to process CSV file (database module)

[Pablo Rodriguez via ntg-context]

Dear list,

These are the following first four lines of a CSV file:

,,
"About \LuaTeX\ and
\ConTeXt","about.pdf","https://www.pragma-ade.com/general/manuals/about.pdf"
"l2r, r2l: A Few
Tips","bidi.pdf","https://www.pragma-ade.com/general/manuals/bidi.pdf"
"Flowcharts","charts-mkiv.pdf",

Faking a command such as \cA, \cB and \cC (for contents of columns A, B
or C) I would like to create a source document with an enumeration that
contains:

  \doiftext{\cB}
    {\item {\em\cA}\attachment[file=\cB]%
      \doiftext{\cC}{ (also available at \cC)}.}

I would like to do that with the "database" module.

So far I have adapted the itemize environment, but I don't get the
contents for items right:

  \usemodule[database]

  \starttext

  \def\ItemContents#1#2#3{\doiftext{#2}
    {\item {\em #1}\attachment[file=#2]%
      \doiftext{#3}{ (also available at #3)}.}}

  \defineseparatedlist
     [test]
     [separator={,}, % tab
      quotechar={"}, % tab
      before={\startitemize[n]},after={\stopitemize},
      first={\ItemContents},last={.},
      left={\{},right={\}}]

  \processdatabasefile[test][context-documents.csv]

  \stoptext

I get an error about an unexpected symbol near "\" in the line of
"\processdatabasefile".

Could anyone enlighten me about what I am missing here?

Many thanks for your help,

Pablo
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[NTG-context] Re: command to process CSV file (database module)

[Pablo Rodriguez via ntg-context]

On 11/5/23 13:56, Pablo Rodriguez via ntg-context wrote:
> [...]
> I get an error about an unexpected symbol near "\" in the line of
> "\processdatabasefile".
>
> Could anyone enlighten me about what I am missing here?

Replying to myself, thanks to the wiki
(https://wiki.contextgarden.net/Commands_with_optional_arguments).

It seems that the command has to be defined as unexpanded, such as in:

  \setupinteraction[state=start]
  \setupattachments[method=hidden]
  \usemodule[database]

  \starttext

  \unexpanded\def\ItemContents#1#2#3{\doiftext{#2}
    {\item {\em #1}\attachment[file=#2, name=\currentitemnumber-#2]%
      \doiftext{#3}{ (also available at #3)}}}

  \defineseparatedlist
     [test]
     [separator={,},
      quotechar={"},
      before={\startitemize[n]},after={\stopitemize},
      first={\ItemContents},last={.},
      left={\{},right={\}}]

  \processdatabasefile[test][context-documents.csv]

  \stoptext

It is not clear for me why is this needed, but it might be one of the
many aspects of expansion that average users cannot understand from TeX.

Many thanks for your help,

Pablo
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________