%D \module
%D   [       file=bibl-bib,
%D        version=2007.08.17,
%D          title=\CONTEXT\ Bibliography Support,
%D       subtitle=Initialization,
%D         author=Hans Hagen \& Taco Hoekwater,
%D           date=\currentdate,
%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.

\writestatus{loading}{ConTeXt Bibliography Support / Experimental BibTeX}

\registerctxluafile{bibl-bib}{1.001}

\unprotect

% todo: et al limiters
% todo: split: citationvariant and publicationvariant

%D This interface is under development. As I don't use \BIBTEX\ myself I need
%D some motivation to spend time on it, and an occasional question on the
%D list can be a reason. A few examples. As \BIBTEX\ databases can be poluted
%D by local commands, we need to catch:
%D
%D \startbuffer
%D \defbibtexcommand\MF  {MF}
%D \defbibtexcommand\MP  {MP}
%D \defbibtexcommand\TUB {TUGboat}
%D \defbibtexcommand\Mc  {Mac}
%D \defbibtexcommand\sltt{\tt}
%D \defbibtexcommand\<#1>{\type{#1}}
%D \defbibtexcommand\acro#1{#1}
%D \stopbuffer
%D
%D \typebuffer
%D
%D Let's define a session and load a few databases. We convert to \UTF\ and
%D strip commands.
%D
%D \startbuffer
%D \definebibtexsession  [somebibtex]
%D \registerbibtexfile   [somebibtex] [tugboat.bib]
%D \registerbibtexfile   [somebibtex] [komoedie.bib]
%D \preparebibtexsession [somebibtex] [convert,strip]
%D \stopbuffer
%D
%D \typebuffer
%D
%D This loads an mapping (work in progress):
%D
%D \startbuffer
%D \def\currentbibtexformat{apa} \input bxml-\currentbibtexformat.mkiv
%D \stopbuffer
%D
%D \typebuffer
%D
%D There are several ways to handle the \XML. It helps if you're a bit
%D familiar with \XML\ processing in \MKIV.
%D
%D Here we regular setups. Three elements are mapped but only one
%D is actually used and applied to root element \type {/bibtex}.
%D
%D \startbuffer
%D \startxmlsetups bibtex
%D     \xmlregistereddocumentsetups{#1}{}
%D     \xmlsetsetup{#1}{bibtex|entry|field}{bibtex:*}
%D     \xmlmain{#1}
%D \stopxmlsetups
%D
%D \startxmlsetups bibtex:bibtex
%D     \xmlfilter{#1}{
%D         /entry[@category='article']
%D         /field[@name='author' and (find(text(),'Hagen') or find(text(),'Hoekwater'))]
%D         /../command(bibtex:format)
%D     }
%D \stopxmlsetups
%D
%D \applytobibtexsession[somebibtex][bibtex]
%D \stopbuffer
%D
%D \typebuffer
%D
%D A simpler setup is given next. Here we just apply a setup to the root
%D element directly:
%D
%D \startbuffer
%D \startxmlsetups bibtex:list
%D     \xmlfilter{#1}{/bibtex/entry/command(bibtex:format)}
%D \stopxmlsetups
%D
%D \applytobibtexsession[somebibtex][bibtex:list]
%D \stopbuffer
%D
%D \typebuffer
%D
%D A slightly more complex expression:
%D
%D \startbuffer
%D \startxmlsetups bibtex:filter
%D     \xmlfilter{#1}{
%D         /bibtex
%D         /entry[@category='article']
%D         /field[@name='author' and (find(text(),'Hagen') or find(text(),'Hoekwater'))]
%D         /../command(bibtex:format)
%D     }
%D \stopxmlsetups
%D
%D \applytobibtexsession[somebibtex][bibtex:filter]
%D \stopbuffer
%D
%D \typebuffer

\newtoks  \everydefinebibtexsession
\newtoks  \everypreparebibtexsession
\newtoks  \everysetupbibtexsession
\setfalse \tracebibtexformat

\unexpanded\def\definebibtexsession{\dosingleargument\dodefinebibtexsession}
\def\preparebibtexsession          {\dodoubleempty   \dopreparebibtexsession}
\unexpanded\def\setupbibtexsession {\dodoubleargument\dosetupbibtexsession}

\def\dodefinebibtexsession     [#1]{\edef\currentbibtexsession{#1}%
                                    \ctxcommand{definebibtexsession("#1")}%
                                    \the\everydefinebibtexsession}

\def\dopreparebibtexsession[#1][#2]{\edef\currentbibtexsession{#1}%
                                    \ctxcommand{preparebibtexsession("#1","bibtex:#1","#2")}%
                                    \the\everypreparebibtexsession}

\def\dosetupbibtexsession  [#1][#2]{\edef\currentbibtexsession{#1}%
                                    \getparameters[\??pb#1][#2]%
                                    \the\everysetupbibtexsession}

\def\registerbibtexfile            {\dodoubleargument\doregisterbibtexfile}
\def\registerbibtexentry           {\dodoubleargument\doregisterbibtexentry}
\def\applytobibtexsession          {\dodoubleargument\doapplytobibtexsession}

\def\doregisterbibtexfile  [#1][#2]{\ctxcommand{registerbibtexfile("#1","#2")}}
\def\doregisterbibtexentry [#1][#2]{\ctxcommand{registerbibtexentry("#1","#2")}}
\def\doapplytobibtexsession[#1][#2]{\xmlprocessregistered{bibtex:#1}{#2}{#2}}

\unexpanded\def\bibtexcommand#1%
  {\ifcsname\??pb:c:#1\endcsname \else
     \fakebibtexcommand{#1}%
   \fi
   \csname\??pb:c:#1\endcsname}

\def\fakebibtexcommand#1%
  {\ifcsname#1\endcsname
     \writestatus{bibtex}{unknown command: #1, using built-in context variant}%
     \setugvalue{\??pb:c:#1}{\dosomebibtexcommand{#1}}%
   \else
     \writestatus{bibtex}{unknown command: #1}%
     \setugvalue{\??pb:c:#1}{\dofakebibtexcommand{#1}}%
   \fi}

\let\dosomebibtexcommand  \getvalue
\def\dofakebibtexcommand#1{{\tttf#1}}

\def\defbibtexcommand#1%
  {\setuvalue{\strippedcsname#1}}

\def\bibxmldoifelse#1{\xmldoifelse\currentbibxmlnode{/field[@name='#1']}}
\def\bibxmldoif    #1{\xmldoif    \currentbibxmlnode{/field[@name='#1']}}
\def\bibxmldoifnot #1{\xmldoifnot \currentbibxmlnode{/field[@name='#1']}}
\def\bibxmlflush   #1{\xmlcontext \currentbibxmlnode{/field[@name='#1']}}
\def\bibxmlsetup     {\xmlsetup   \currentbibxmlnode} % {#1}

\def\currentbibtexformat{apa}    % how to interface this, maybe split loading and key
\def\currentbibxmlnode  {unset}
\def\currentbibxmltag   {unset}

\startxmlsetups bibtex
    \xmlregistereddocumentsetups{#1}{}
    \xmlsetsetup{#1}{bibtex|entry|field}{bibtex:*}
    \xmlmain{#1}
\stopxmlsetups

\startxmlsetups bibtex:format
    \bibtexpublicationsparameter\c!before\relax % prevents lookahead
    \edef\currentbibxmlnode    {#1}
    \edef\currentbibxmltag     {\xmlatt{#1}{tag}}
    \edef\currentbibxmlcategory{\xmlatt{#1}{category}}
    \ifconditional\tracebibtexformat
        \tracedbibxmlintro\currentbibxmltag
        \tracedbibxmlintro\currentbibxmlcategory
    \fi
    \ignorespaces
    \xmlcommand{#1}{.}{bibtex:\currentbibtexformat:\currentbibxmlcategory}
    \removeunwantedspaces
    \bibtexpublicationsparameter\c!after\relax % prevents lookahead
\stopxmlsetups

\startxmlsetups bibtex:list
    \xmlfilter{#1}{/bibtex/entry/command(bibtex:format)}
\stopxmlsetups

\startxmlsetups bibtex:bibtex
    \xmlfilter{#1}{/entry/command(bibtex:format)}
\stopxmlsetups

% formatters

\let\normalbibxmlflush\bibxmlflush

\definecolor[bibtextracecolor:field]   [darkred]
\definecolor[bibtextracecolor:crossref][darkblue]
\definecolor[bibtextracecolor:key]     [darkgreen]

\def\tracedbibxmlintro   #1{{\tttf#1 -> }}
\def\tracedbibxmlflush   #1{\color[bibtextracecolor:field]   {\tttf[#1]}}
\def\tracedbibxmltexts   #1{\color[bibtextracecolor:field]   {\tttf<#1>}}
\def\tracedbibxmlcrossref#1{\color[bibtextracecolor:crossref]{\tttf#1}}
\def\tracedbibxmlkey     #1{\color[bibtextracecolor:key]     {\tttf#1}}

\def\tracedbibxmltext
  {\ifconditional\tracebibtexformat
     \expandafter\tracedbibxmltexts % plural
   \else
     \expandafter\firstofoneargument
   \fi}

\def\bibxmlflush
  {\ifconditional\tracebibtexformat
     \expandafter\tracedbibxmlflush
   \else
     \expandafter\normalbibxmlflush
   \fi}

\startxmlsetups bibtex:format:crossref
    \ifconditional\tracebibtexformat
        \tracedbibxmlcrossref{\xmlfirst\currentbibxmlnode{/field[@name='crossref']/lower()}}
    \else
        \cite[\xmlfirst\currentbibxmlnode{/field[@name='crossref']/lower()}]
    \fi
\stopxmlsetups

\startxmlsetups bibtex:format:key
    \ifconditional\tracebibtexformat
        \tracedbibxmlkey{\normalbibxmlflush{key}}
    \else
        \bibxmlflush{key}
    \fi
\stopxmlsetups

\startxmlsetups bibtex:format:common:author
   \ifconditional\tracebibtexformat
        \bibxmlflush\currentbibtexvariant
   \else
        \xmlfilter{#1}{/field[@name='\currentbibtexvariant']/bibtexconcat('\currentbibtexvariant')}
    \fi
\stopxmlsetups

\startxmlsetups bibtex:format:author
    \begingroup
        \def\currentbibtexvariant{author}
        \xmlsetup{#1}{bibtex:format:common:author}
    \endgroup
\stopxmlsetups

\startxmlsetups bibtex:format:artauthor
    \begingroup
        \def\currentbibtexvariant{artauthor}
        \xmlsetup{#1}{bibtex:format:common:author}
    \endgroup
\stopxmlsetups

\startxmlsetups bibtex:format:editor
    \begingroup
        \def\currentbibtexvariant{editor}
        \xmlsetup{#1}{bibtex:format:common:author}
    \endgroup
\stopxmlsetups

\startxmlsetups bibtex:format:doi
%   \bibdoifelse{\@@pb@doi}{#1\expanded{\bibgotoDOI{\@@pb@thekey}{\@@pb@doi}}#2}{#3}
    *doi*
\stopxmlsetups

\startxmlsetups bibtex:format:doi
%   \bibdoifelse{\@@pb@biburl}{#1\expanded{\bibgotoURL{\@@pb@thekey}{\@@pb@biburl}}#2}{#3}
    *url*
\stopxmlsetups

\startxmlsetups bibtex:format:month
%   {\bibdoifelse\@@pb@month
%      {#1\doifnumberelse\@@pb@month
%        {\doifconversiondefinedelse\@@pbmonthconversion
%           {\convertnumber\@@pbmonthconversion\@@pb@month}{\@@pb@month}}%
%           {\@@pb@month}#2}%
%      {#3}
    *month*
\stopxmlsetups

% lists

\def\bibtexlistprocessor
  {\ctxlua{bibtex.hacks.add(structures.lists.uservalue("\currentlist",\currentlistindex,"bibref"),\currentlistindex)}}

\appendtoks
    \definelist[\currentbibtexsession]%
    \setuplist[\currentbibtexsession][\c!state=\v!start,\c!width=]%
    \installstructurelistprocessor{\currentbibtexsession:userdata}{\bibtexlistprocessor}%
\to \everydefinebibtexsession

% \def\installbibtexsorter#1#2%
%   {\setvalue{\??pb:\c!sort:#1}{#2}}

% \installbibtexsorter\v!no     {no}
% \installbibtexsorter\v!author {au}
% \installbibtexsorter\v!title  {ti}
% \installbibtexsorter\v!short  {ab}
% \installbibtexsorter\empty    {no}
% \installbibtexsorter\s!default{no}

% \setupbibtex
%   [\c!sorttype=\v!cite,
%    \c!sort=no]

% \long\unexpanded\def\startpublication#1\stoppublication
%   {\blank
%    todo
%    \blank}

% \let\stoppublication\relax

\unexpanded\def\bibtexspace   {\removeunwantedspaces\space}
\unexpanded\def\bibtexperiod  {\removeunwantedspaces.\space}
\unexpanded\def\bibtexcomma   {\removeunwantedspaces,\space}
\unexpanded\def\bibtexlparent {\removeunwantedspaces\space(}
\unexpanded\def\bibtexrparent {\removeunwantedspaces)\space}
\unexpanded\def\bibtexlbracket{\removeunwantedspaces\space[}
\unexpanded\def\bibtexrbracket{\removeunwantedspaces]\space}

% interfacing

% todo : lang en language
% todo : directions

% variables

\ifdefined\bibtexblock   \else \newcount\bibtexblock   \fi \bibtexblock\plusone
\ifdefined\bibtexcounter \else \newcount\bibtexcounter \fi

\newtoks \everysetupbibtexpublications
\newtoks \everysetupbibtexcitations

\def\bibtexrefprefix{\number\bibtexblock:}

\let\currentbibtexsession\s!default
\let\currentbibtexvariant\s!default

% parameters: session+variant variant session shared

\def\bibtexpublicationsparameter#1%
  {\csname
     \ifcsname\??pb\currentbibtexsession:\currentbibtexvariant#1\endcsname
       \??pb\currentbibtexsession:\currentbibtexvariant#1%
     \else\ifcsname\??pb:\currentbibtexvariant#1\endcsname
       \??pb:\currentbibtexvariant#1%
     \else\ifcsname\??pb\currentbibtexsession#1\endcsname
       \??pb\currentbibtexsession#1%
     \else\ifcsname\??pb#1\endcsname
       \??pb#1%
     \else
       \s!empty
     \fi\fi\fi\fi
   \endcsname}

\def\bibtexcitationparameter#1%
  {\csname
     \ifcsname\??pv\currentbibtexsession:\currentbibtexvariant#1\endcsname
       \??pv\currentbibtexsession:\currentbibtexvariant#1%
     \else\ifcsname\??pv:\currentbibtexvariant#1\endcsname
       \??pv:\currentbibtexvariant#1%
     \else\ifcsname\??pv\currentbibtexsession#1\endcsname
       \??pv\currentbibtexsession#1%
     \else\ifcsname\??pv#1\endcsname
       \??pv#1%
     \else
       \s!empty
     \fi\fi\fi\fi
   \endcsname}

% setup commands

\unexpanded\def\setupbibtexpublications
  {\let\currentpublicationclass\??pb
   \let\everysetupbibtexwhatever\everysetupbibtexpublications
   \dodoubleargument\dosetupbibtexwhatever}

\unexpanded\def\setupbibtexcitations
  {\let\currentpublicationclass\??pv
   \let\everysetupbibtexwhatever\everysetupbibtexcitations
   \dodoubleargument\dosetupbibtexwhatever}

\unexpanded\def\setupbibtexpublicationvariants
  {\let\currentpublicationclass\??pb
   \let\everysetupbibtexwhatever\everysetupbibtexpublications
   \dotripleargument\dosetupbibtexwhatevervariant}

\unexpanded\def\setupbibtexcitationvariants
  {\let\currentpublicationclass\??pv
   \let\everysetupbibtexwhatever\everysetupbibtexcitations
   \dotripleargument\dosetupbibtexwhatevervariant}

\def\dosetupbibtexwhatever[#1][#2]% [sessionlist] [setup]
  {\ifsecondargument
     % sessions setups
     \def\dobtxcommand##1{\getparameters[\currentpublicationclass##1][#2]}%
     \processcommalist[#1]\dobtxcommand
   \else
     % setups
     \getparameters[\currentpublicationclass][#1]%
     \the\everysetupbibtexwhatever
   \fi}

\def\dosetupbibtexwhatevervariant[#1][#2][#3]% [sessionlist] [variantlist] [setup]
  {\ifthirdargument
     % sessions variants setups
     \def\dobtxcommand##1%
       {\def\dodobtxcommand####1{\getparameters[\currentpublicationclass##1:####1][#3]}%
        \processcommalist[#2]\dodobtxcommand}%
     \processcommalist[#1]\docbtxommand
   \else\ifsecondargument
     % variants setups
     \def\dobtxcommand##1{\getparameters[\currentpublicationclass:##1][#2]}%
     \processcommalist[#1]\dobtxcommand
   \else
     % setups
     \getparameters[\currentpublicationclass][#1]%
     \the\everysetupbibtexwhatever
   \fi\fi}

% some initializations

\setupbibtexcitationvariants
  [author,authoryear,authoryears]
  [\c!namesep={, }]

% loading alternatives (apa etc)

\def\doloadbibtexpublicationalternative
  {\ifproductionrun
     \edef\bibtexpublicationsalternative{\@@pbalternative}% parent
     \ifx\bibtexpublicationsalternative\empty \else
       \processcommacommand[\bibtexpublicationsalternative]\dodoloadbibtexpublicationalternative
       \let\@@pbalternative\empty
     \fi
   \fi}

\def\dodoloadbibtexpublicationalternative#1%
  {\doonlyonce{#1}
     {\startreadingfile
      \readsysfile{bxml-#1.mkiv}
        {\showmessage\m!publications{6}{bxml-#1}}
        {\showmessage\m!publications{1}{bxml-#1}}%
      \stopreadingfile}}

\appendtoks
    \doloadbibtexpublicationalternative
\to \everysetupbibtexpublications

% we expect at least one invocation of the setup commands
% because otherwise we always load the apa style even if
% no publications are used
%
% \appendtoks
%     \doloadbibtexpublicationalternative
% \to \everystarttext

% whatever, should be key

\def\bibtexleftnumber#1{#1\hfill~}

% testing

% \showmessage\m!publications{5}{#1 is unknown}\secondoftwoarguments}

\let\doifbibreferencefoundelse\secondofthreearguments

% lists

\newtoks\everysetupbibtexlistplacement

% this will change as we need it too often .. we will use context.thebibtexnamesep

\appendtoks
    \ctxlua {bibtex.authors.setsettings {
        namesep      = \!!bs\bibtexpublicationsparameter\c!namesep\!!es,
        lastnamesep  = \!!bs\bibtexpublicationsparameter\c!lastnamesep\!!es,
        finalnamesep = \!!bs\bibtexpublicationsparameter\c!finalnamesep\!!es,
        firstnamesep = \!!bs\bibtexpublicationsparameter\c!firstnamesep\!!es,
        juniorsep    = \!!bs\bibtexpublicationsparameter\c!juniorsep\!!es,
        vonsep       = \!!bs\bibtexpublicationsparameter\c!vonsep\!!es,
        surnamesep   = \!!bs\bibtexpublicationsparameter\c!surnamesep\!!es,
        namesep      = \!!bs\bibtexpublicationsparameter\c!namesep\!!es,
        lastnamesep  = \!!bs\bibtexpublicationsparameter\c!lastnamesep\!!es,
        finalnamesep = \!!bs\bibtexpublicationsparameter\c!finalnamesep\!!es,
        author = {
            etallimit   = \!!bs\bibtexpublicationsparameter\c!authoretallimit\!!es,
            etaldisplay = \!!bs\bibtexpublicationsparameter\c!authoretaldisplay\!!es,
            etaltext    = \!!bs\bibtexpublicationsparameter\c!authoretaltext\!!es,
        },
        editor = {
            etallimit   = \!!bs\bibtexpublicationsparameter\c!editoretallimit\!!es,
            etaldisplay = \!!bs\bibtexpublicationsparameter\c!editoretaldisplay\!!es,
            etaltext    = \!!bs\bibtexpublicationsparameter\c!editoretaltext\!!es,
        },
        artauthor = {
            etallimit   = \!!bs\bibtexpublicationsparameter\c!artauthoretallimit\!!es,
            etaldisplay = \!!bs\bibtexpublicationsparameter\c!artauthoretaldisplay\!!es,
            etaltext    = \!!bs\bibtexpublicationsparameter\c!artauthoretaltext\!!es,
        },
    } }%
\to \everysetupbibtexlistplacement

\def\completebibtexpublications{\dodoubleempty\docompletebibtexpublications}
\unexpanded\def\placebibtexpublications   {\dodoubleempty\doplacebibtexpublications}

\def\docompletebibtexpublications[#1][#2]% title might become obsolete, just headtext
  {\begingroup
   \edef\currentbibtexsession{#1}%
   \let\currentlist\currentbibtexsession
   \setuplist[\currentbibtexsession][\c!criterium=\v!previous,#2]
   \edef\currentbibtexsessiontitle{\namedlistparameter\currentbibtexsession\c!title}%
   \ifx\currentbibtexsessiontitle\empty
     \normalexpanded{\startnamedsection[\v!chapter][\c!reference=\currentbibtexsession,\c!title={\headtext{\currentbibtexsession}}]}%
   \else
     \normalexpanded{\startnamedsection[\v!chapter][\c!reference=\currentbibtexsession,\c!title={\currentbibtexsessiontitle}]}%
   \fi
   \dodoplacebibtexpublications
   \stopnamedsection
   \endgroup}

\def\doplacebibtexpublications[#1][#2]%
  {\begingroup
   \edef\currentbibtexsession{#1}%
   \let\currentlist\currentbibtexsession
   \setuplist[\currentbibtexsession][\c!criterium=\v!previous,#2]%
   \dodoplacebibtexpublications
   \endgroup}

\def\dodoplacebibtexpublications
  {\determinelistcharacteristics[\currentbibtexsession]%
   \the\everysetupbibtexlistplacement
   \forgetall
   \typesetbibtexlist
   \global\advance\bibtexblock\plusone}

\setvalue{\??pb:\c!numbering:\v!short}#1% todo var s -> short tag
  {\bibtexlistnumberbox{\bibtexpublicationsparameter\c!numbercommand{\bibtexgetshort\currentpublicationtag}}}

\setvalue{\??pb:\c!numbering:\v!bib}#1% todo var n -> number
  {\bibtexlistnumberbox{\bibtexpublicationsparameter\c!numbercommand{\bibtexgetnumber\currentpublicationtag}}}

\setvalue{\??pb:\c!numbering:\s!unknown}#1%
  {\bibtexlistnumberbox{\bibtexpublicationsparameter\c!numbercommand{#1}}}

\def\@@pblimitednumber % name
  {\csname\??pb:\c!numbering:%
     \ifcsname\??pb:\c!numbering:\currentbibtexnumbering\endcsname
       \currentbibtexnumbering
     \else
       \s!unknown
     \fi
   \endcsname}

\appendtoks
   \edef\currentbibtexnumbering{\bibtexpublicationsparameter\c!numbering}%
   \ifx\currentbibtexnumbering\v!no
     \setuplist[\currentbibtexsession][\c!numbercommand=,\c!symbol=\v!none,\c!textcommand=\outdented]%
   \else
     \setuplist[\currentbibtexsession][\c!numbercommand=\@@pblimitednumber]%
   \fi
\to \everysetupbibtexlistplacement

\newdimen\bibtexnumberwidth

\def\bibtexlistnumberbox{\hbox \ifcase\bibtexnumberwidth\else to \bibtexnumberwidth\fi}

\appendtoks
   \doifelse{\bibtexpublicationsparameter\c!autohang}\v!yes
     {\ifx\currentbibtexnumbering\v!short
        \setbox\scratchbox\hbox{\bibtexpublicationsparameter\c!numbercommand{\bibtexpublicationsparameter\c!samplesize}}%
      \else
        \setbox\scratchbox\hbox{\bibtexpublicationsparameter\c!numbercommand{\ctxlua{tex.write(structures.lists.size())}}}%
      \fi
      \bibtexnumberwidth\wd\scratchbox
      \setuplist[\currentbibtexsession][\c!distance=\zeropoint]}
     {\doifelsenothing{\bibtexpublicationsparameter\c!width}
        {\bibtexnumberwidth\zeropoint}
        {\bibtexnumberwidth\bibtexpublicationsparameter\c!width}}%
   \setuplist[\currentbibtexsession][\c!width=\bibtexnumberwidth]%
\to \everysetupbibtexlistplacement

\appendtoks
    \let\maybeyear\gobbleoneargument
    \let\noopsort \gobbleoneargument
\to \everysetupbibtexlistplacement

\appendtoks
   \doifelse{\bibtexpublicationsparameter\c!maybeyear}\v!off
     {\let\maybeyear\gobbleoneargument}
     {\let\maybeyear\firstofoneargument}%
\to \everysetupbibtexlistplacement

\appendtoks
   \doifnot{\bibtexpublicationsparameter\c!option}\v!continue
     {\global\bibtexcounter\zerocount}%
\to \everysetupbibtexlistplacement

\appendtoks
    \edef\currentbibtexcriterium{\namedlistparameter\currentbibtexsession\c!criterium}%
\to \everysetupbibtexlistplacement

\def\typesetbibtexlist
  {\begingroup
   \startpacked[\v!blank]%
   \doif{\namedlistparameter\currentbibtexsession\c!criterium}\v!cite
     {\setuplist[\currentbibtexsession][\c!criterium=\v!here]}%
   \doifelse{\bibtexpublicationsparameter\c!method}\v!local
     {\ctxlua{bibtex.hacks.reset(1)}}% function can take method
     {\ctxlua{bibtex.hacks.reset(2)}}%
   \strc_lists_place_current
     {\currentbibtexsession}
     {\currentbibtexcriterium}
     {\namedlistparameter\currentbibtexsession\c!number}%
     {\namedlistparameter\currentbibtexsession\c!extras}%
     {\namedlistparameter\currentbibtexsession\c!order}%
   \ctxlua{bibtex.hacks.flush("\bibtexpublicationsparameter\c!sorttype")}%
   \stoppacked
   \endgroup}

\unexpanded\def\typesetbibtexpublication#1%
  {\edef\currentbibtexsessiontag{#1}%
   \ifx\currentbibtexsessiontag\empty
     % can't really happen
   \else\ifx\currentbibtexcriterium\v!all
     \dotypesetbibtexpublication % was \doplacepublicationindeed
   \else
     \ctxlua{bibtex.hacks.doifalreadyplaced("\currentbibtexsessiontag")}
       \donothing
       \dotypesetbibtexpublication
   \fi\fi}

\def\dotypesetbibtexpublication
  {\doifbibreferencefoundelse\currentbibtexsessiontag
     {\global\advance\bibtexcounter\plusone
      \ctxlua{bibtex.hacks.registerplaced("\currentbibtexsessiontag")}%
      \let\currentlist\currentbibtexsession
      \let\currentlistentrynumber    \bibtexcounter
      \let\currentlistentrytitle     \thebibtexpublicationlistelement
      \let\currentlistentrypagenumber\empty
      \strc_lists_apply_renderingsetup}
     {}} % invalid

\def\thebibtexpublicationlistelement
   {\strut
    \expanded{\reference[\bibtexrefprefix\currentbibtexsessiontag]{\number\bibtexcounter}}%
    \dotypesetabibtexpublication\currentbibtexsessiontag
    \strut}

\def\dotypesetabibtexpublication#1%
  {\begingroup
   \ignorespaces
   \xmlfilter{bibtex:\currentbibtexsession}{/bibtex/entry[@tag='#1']/command(bibtex:format)}%
   \removeunwantedspaces
%  \ignorespaces
%  \bibalternative{\bibgetvart{#1}}%
%  \removeunwantedspaces
   \endgroup}

\def\doprocessbibtexentry#1{\typesetbibtexpublication{#1}}

% citations

\unexpanded\def\bibtexcitation[#1]%
  {\edef\currentbibtexsession{#1}%
   \strictdoifnextoptionalelse\dobibtexcitation\dobibtexref}

\def\dobibtexref#1%
  {\dodobibtexcitation[#1][]}

\def\dobibtexcitation[#1]%
  {\strictdoifnextoptionalelse{\dodobibtexcitation[#1]}{\dodobibtexcitation[#1][]}}

\def\dodobibtexcitation[#1][#2]%
  {\dontleavehmode
   \begingroup
   \doifelsenothing{#2}\secondargumentfalse\secondargumenttrue
   \ifsecondargument
     \dowhateverbibtexcitation{#1}{#2}%
   \else
     \donumberedbibtexcitation{#1}%
   \fi
   \endgroup}

\def\dowhatevercitation#1#2%
  {\processcommalist[#2]\dobibtexcitationindeed
   \setupinteraction[\c!style=]% use flag instead
   \doifassignmentelse{#1}
     {\getparameters[\??pb\??pb][\c!alternative=,\c!extras=,#1]%
      \edef\currentbibtexvariant{\@@pb@@pbalternative}%
      \ifx\currentbibtexvariant\empty
        \edef\currentbibtexvariant{\bibtexpublicationparameter\c!refcommand}%
      \fi
      \ifx\@@pb@@pbextras\empty
        \setupcite[\currentbibtexvariant][#1]%
      \else
        \edef\@@pb@@pbextras{{\@@pb@@pbextras\ifdefined\@@pb@@pbright\@@pb@@pbright\else\bibtexpublicationparameter\c!right\fi}}%
        \expanded{\setupcite[\currentbibtexvariant][#1,\c!right=\@@pb@@pbextras]}%
      \fi}%
     {\def\currentbibtexvariant{#1}}%
   \getvalue{bibtex\currentbibtexvariant ref}[#2]}

\def\donumberedbibtexcitation#1%
  {\processcommalist[#1]\dobibtexcitationindeed
   \setupinteraction[\c!style=]%
   \edef\currentbibtexvariant{\bibtexcitationparameter\c!refcommand}%
   \getvalue{bibtex\currentbibtexvariant ref}[#1]}

\def\dobibtexcitationindeed#1%
  {\iftrialtypesetting \else
     \expanded{\writedatatolist[\currentbibtexsession][bibref=#1]}%
   \fi}

\def\nobibtexcitation[#1]%
  {\processcommalist[#1]\dobibtexcitationindeed}

\def\bibtexnumref[#1]%
  {\dontleavehmode
   \begingroup
   \bibtexcitationparameter\v!left
   \penalty\plustenthousand
   \ctxlua{bibtex.hacks.resolve("","\number\bibtexblock","#1")}%
   \bibtexcitationparameter\v!right
   \endgroup}

\def\dowithbibtexnumrefconnector#1#2%
  {\ifnum#1>\plusone
     \ifnum#2>\plusone
       \ifnum#2=#1\relax
         \bibtexpublicationsparameter\c!lastpubsep
       \else
         \bibtexpublicationsparameter\c!pubsep
       \fi
     \fi
   \fi}

\def\dowithbibtexnumref#1#2#3#4#5% n, i, prefix block ref
  {\dowithbibtexnumrefconnector{#1}{#2}%
   \def\bibtexrefprefix{#4:}%
   \inbiblink[#5]}

\def\dowithbibtexnumrefrange#1#2#3#4#5#6#7% n, i, prefix block ref
  {\dowithbibtexnumrefconnector{#1}{#2}%
   \def\bibtexrefprefix{#4:}%
   \inbiblink[#5]%
   \endash
   \def\bibtexrefprefix{#6:}%
   \inbiblink[#7]}

\def\nobibtexnumref#1%
  {[#1]}

% hm

%     \def\@@pbinumbercommand{\executeifdefined{\??pb:\c!numbercommand:\@@pbnumbering}\firstofoneargument}

%     \letvalue{\??pb:\c!numbercommand:\v!yes  }\firstofoneargument
%     \letvalue{\??pb:\c!numbercommand:\v!no   }\gobbleoneargument
%     \setvalue{\??pb:\c!numbercommand:\v!short}{\bibtexgetshort\currentpublicationtag\gobbleoneargument}
%     \setvalue{\??pb:\c!numbercommand:\v!bib  }{\bibtexgetnumber\currentpublicationtag\gobbleoneargument}

%     \def\bibalternative#1{\csname\??pv\@@currentalternative#1\endcsname}

% basic setup

% parent -> publicationlist
%
% \setuplist
%   [\currentbibtexsession]
%   [\c!samplesize={AA99},
%    \c!alternative=a,
%    \c!interaction=,
%    \c!pagenumber=\v!no,
%    #1,
%    \c!command=]

% \setuppublicationlist
%   [\c!title=,
%    \c!command=\dospecialbibinsert,
%    \c!maybeyear=\v!on]

\setupbibtexpublications
  [\c!monthconversion=,
   \c!alternative=apa,
   \c!method=\v!global,
   \c!refcommand=num,
   \c!numbercommand=\bibtexleftnumber]

\setupbibtexcitations % command ?
  [\c!refcommand=num]

% helpers

\def\doifbibtexinteractionelse
  {\iflocation
     \edef\temp{\bibtexcitationparameter\c!interaction}%
     \ifx\temp\v!stop
       \@EA@EA@EA\secondoftwoarguments
     \else
       \@EA@EA@EA\firstoftwoarguments
     \fi
   \else
     \@EA\secondoftwoarguments
   \fi}

% variants

% todo: lastsep here

\newconditional\firstbibtexrefsep

\def\bibtexresetrefsep
  {\settrue\firstbibtexrefsep}

\def\bibtexinsertrefsep
  {\ifconditional\firstbibtexrefsep
     \setfalse\firstbibtexrefsep
   \else
     \bibtexcitationparameter\c!pubsep
   \fi}

\def\inbibtexlink#1#2%
  {\doifreferencefoundelse{\bibtexrefprefix#1}
     {\goto{#2}[\bibtexrefprefix#1]}
     {!#1!}}

\def\dobibtexgotolink#1#2%
  {\doifreferencefoundelse{\bibtexrefprefix#1}
     {\goto{#2}[\bibtexrefprefix#1]}
     {!#1!}}

\def\dobibattexlink#1#2%
  {\doifreferencefoundelse{\bibtexrefprefix#1}
    {\at{#2}[\bibtexrefprefix#1]}
    {!#1!}}

\def\dobibtexurllink#1#2%
  {\expanded{\useURL[bibtex:url:#1][#2]}%
   \doifbibtexinteractionelse
     {\goto{\url[bibtex:url:#1]}[url(bibtex:url:#1)]}
     {\url[bibtex:url:#1]}}

% todo: style, color

\unexpanded\def\bibtexdataref       {\dodoubleargument\dobibtexdataref}
\unexpanded\def\bibtextyperef       {\dodoubleargument\dobibtextyperef}
\unexpanded\def\bibtexkeyref        {\dodoubleargument\dobibtexkeyref}
\unexpanded\def\bibtexserialref     {\dodoubleargument\dobibtexserialref}
\unexpanded\def\bibtexurlref        {\dodoubleargument\dobibtexurlref}
\unexpanded\def\bibtexdoiref        {\dodoubleargument\dobibtexdoiref}
\unexpanded\def\bibtexpageref       {\dodoubleargument\dobibtexpageref}
\unexpanded\def\bibtexnoneref       {\dodoubleargument\dobibtexnoneref}
\unexpanded\def\bibtexshortref      {\dodoubleargument\dobibtexshortref}
\unexpanded\def\bibtexyearref       {\dodoubleargument\dobibtexyearref}
\unexpanded\def\bibtexauthorref     {\dodoubleargument\dobibtexauthorref}
\unexpanded\def\bibtexauthoryearref {\dodoubleargument\dobibtexauthoryearref}
\unexpanded\def\bibtexauthoryearsref{\dodoubleargument\dobibtexauthoryearsref}

\def\dobibtexdataref       {\doprocessbibtexref\dodobibtexdataref       {ref}}    % [#1][#2]
\def\dobibtextyperef       {\doprocessbibtexref\dodobibtextyperef       {type}}   % [#1][#2]
\def\dobibtexkeyref        {\doprocessbibtexref\dodobibtexkeyref        {key}}    % [#1][#2]
\def\dobibtexserialref     {\doprocessbibtexref\dodobibtexserialref     {serial}} % [#1][#2]
\def\dobibtexurlref        {\doprocessbibtexref\dodobibtexurlref        {url}}    % [#1][#2]
\def\dobibtexdoiref        {\doprocessbibtexref\dodobibtexdoiref        {doi}}    % [#1][#2]
\def\dobibtexpageref       {\doprocessbibtexref\dodobibtexpageref       {page}}   % [#1][#2]
\def\dobibtexnoneref       {\doprocessbibtexref\dodobibtexnoneref       {none}}   % [#1][#2]
\def\dobibtexshortref      {\doprocessbibtexref\dodobibtexshortref      {short}}  % [#1][#2]
\def\dobibtexyearref       {\doprocessbibtexref\dodobibtexyearref       {year}}   % [#1][#2]
\def\dobibtexauthorref     {\doprocessbibtexref\dodobibtexauthorref     {author}} % [#1][#2]
\def\dobibtexauthoryearref {\doprocessbibtexref\dodobibtexauthoryearref {authoryear}} % [#1][#2]
\def\dobibtexauthoryearsref{\doprocessbibtexref\dodobibtexauthoryearsref{authoryears}} % [#1][#2]

\def\doprocessbibtexref#1#2[#3][#4]%
  {\edef\currentbibtexsession{#3}%
   \edef\currentbibtexvariant{#2}%
   \def\dodoprocessbibtexref##1%
     {% test for existence
      \edef\currentbibtextag{##1}%
      \bibtexinsertrefsep
      #1{##1}}%
   \bibtexresetrefsep
   \bibtexcitationparameter\v!left
   \processcommalist[#4]\dodoprocessbibtexref\relax
   \bibtexcitationparameter\v!right}

\def\dodobibtexdataref#1%
  {\dotypesetabibtexpublication{#1}}

\def\dodobibtextyperef#1%
  {\edef\bibtexrefcontent{\xmlfilter{bibtex:\currentbibtexsession}{/bibtex/entry[@tag='#1']/attribute('category')}}%
   \bibtexrefcontent}

\def\dodobibtexkeyref#1%
  {\edef\bibtexrefcontent{\xmlfilter{bibtex:\currentbibtexsession}{/bibtex/entry[@tag='key']/context()}}%
   \dobibtexgotolink{#1}{\bibtexrefcontent}}

\def\dodobibtexserialref#1%
  {\edef\bibtexrefcontent{\xmlfilter{bibtex:\currentbibtexsession}{/bibtex/entry[@tag='#1']/match()}}%
   \dobibtexgotolink{#1}{\bibtexrefcontent}}

\def\dodobibtexurlref#1%
  {\edef\bibtexrefcontent{\xmlfilter{bibtex:\currentbibtexsession}{/bibtex/entry[@tag='#1']/field[@name='url']/context()}}%
   \dobibtexurllink{#1}{\bibtexrefcontent}}

\def\dodobibtexdoiref#1%
  {\edef\bibtexrefcontent{\xmlfilter{bibtex:\currentbibtexsession}{/bibtex/entry[@tag='#1']/field[@name='doi']/context()}}%
   \dobibtexurllink{#1}{http://dx.doi.org/\bibtexrefcontent}}

\def\dodobibtexpageref#1%
  {\dobibtexatlink{#1}{}} % second argument can become 'page'

\def\dodobibtexnoneref#1%
  {}

\def\dodobibtexshortref#1%
  {\edef\bibtexrefcontent{\xmlfilter{bibtex:\currentbibtexsession}{/bibtex/entry[@tag='#1']/bibtexshort()}}%
   \dobibtexgotolink{#1}{\bibtexrefcontent}}

\def\dodobibtexyearref#1%
  {\edef\bibtexrefcontent{\xmlfilter{bibtex:\currentbibtexsession}{/bibtex/entry[@tag='#1']/field[@name='year']/context()}}%
   \bibtexrefcontent}

% \def\bibmaybeinteractive#1#2%
%   {\doifelsevalue{@@pv\@@currentalternative\c!compress}
%      {\ifbibinteractionelse{\gotobiblink{#2}[#1]}{#2}}
%      {#2}}

% \def\bibauthornumref[#1]%
%   {\getcommalistsize[#1]%
%    \global\bibitemcounter\commalistsize
%    \bibresetrefsep
%    \processcommalist[#1]\dobibauthornumref }
%
% \def\dobibauthornumref#1%
%  {\bibinsertrefsep
%   \doifbibreferencefoundelse{#1}
%     {\begingroup
%      \bibgetvara{#1}%
%      \bibalternative\c!inbetween
%      \setuppublications[\c!refcommand=num]%
%      \cite[#1]%
%      \endgroup}
%     {}}

% compress years
% andtext namesep
% otherstext authoretallimit

% we will use context.* instead at the lua end because it saves us passing settings

% \def\thebibtexpubsep           {\bibtexpublicationsparameter\c!pubsep}
% \def\thebibtexlastpubsep       {\bibtexpublicationsparameter\c!lastpubsep}
% \def\thebibtexfinalpubseparator{\bibtexpublicationsparameter\c!lastpubsep}

\def\dodobibtexauthorref     #1{\ctxlua{bibtex.authorref     ("bibtex:\currentbibtexsession","#1","normal","author")}}
\def\dodobibtexauthoryearref #1{\ctxlua{bibtex.authoryearref ("bibtex:\currentbibtexsession","#1","normal","author")}}
\def\dodobibtexauthoryearsref#1{\ctxlua{bibtex.authoryearsref("bibtex:\currentbibtexsession","#1","normal","author")}}

\unexpanded\def\bibtexsingularplural#1#2{\ctxlua{bibtex.singularorplural(\!!bs#1\!!es,\!!bs#2\!!es)}}

\protect \endinput

