% !TEX root = slides.tex

\usepackage{expl3}
\usepackage{xparse}

%%%%%%%%%%%%
% Metadata %
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\ExplSyntaxOn

\tl_new:N   \l__configsupport_title_tl
\tl_new:N   \l__configsupport_author_tl
\tl_new:N   \l__configsupport_iso_date_tl
\tl_new:N   \l__configsupport_faculty_tl
\tl_new:N   \l__configsupport_chair_tl
\tl_new:N   \l__configsupport_workgroup_tl
\bool_new:N \l__configsupport_english_bool

\ProvideExpandableDocumentCommand{\settalktitle}{m}{
    \tl_set:Nn \l__configsupport_title_tl {#1}
}
\ProvideExpandableDocumentCommand{\talktitle}{}{\tl_use:N \l__configsupport_title_tl}

\ProvideExpandableDocumentCommand{\settalkauthor}{m}{
    \tl_set:Nn \l__configsupport_author_tl {#1}
}
\ProvideExpandableDocumentCommand{\addtalkauthor}{m}{
    \tl_if_empty:NF \l__configsupport_author_tl { \tl_put_right:Nn \l__configsupport_author_tl {,\ } }
    \tl_put_right:Nn \l__configsupport_author_tl {#1}
}
\ProvideExpandableDocumentCommand{\talkauthor}{}{\tl_use:N \l__configsupport_author_tl}

\ProvideExpandableDocumentCommand{\settalkisodate}{m}{
    \tl_set:Nn \l__configsupport_iso_date_tl {#1}
}
\ProvideExpandableDocumentCommand{\talkisodate}{}{\tl_use:N \l__configsupport_iso_date_tl}
\ProvideExpandableDocumentCommand{\talkdate}{}{\exp_args:Nf \DTMDate \talkisodate}

\ProvideExpandableDocumentCommand{\setfaculty}{m}{
    \tl_set:Nn \l__configsupport_faculty_tl {#1}
}
\ProvideExpandableDocumentCommand{\faculty}{}{\tl_use:N \l__configsupport_faculty_tl}

\ProvideExpandableDocumentCommand{\setchair}{m}{
    \tl_set:Nn \l__configsupport_chair_tl {#1}
}
\ProvideExpandableDocumentCommand{\chair}{}{\tl_use:N \l__configsupport_chair_tl}

\ProvideExpandableDocumentCommand{\setworkgroup}{m}{
    \tl_set:Nn \l__configsupport_workgroup_tl {#1}
}
\ProvideExpandableDocumentCommand{\workgroup}{}{\tl_use:N \l__configsupport_workgroup_tl}

\ProvideExpandableDocumentCommand{\germantalk}{}{
    \bool_set_false:N \l__configsupport_english_bool
}

\ProvideExpandableDocumentCommand{\englishtalk}{}{
    \bool_set_true:N \l__configsupport_english_bool
}

\ProvideExpandableDocumentCommand{\languagesetup}{}{
    \bool_if:NTF \l__configsupport_english_bool {
        \setdefaultlanguage[variant=usmax]{english}
        \setotherlanguage[variant=german, latesthyphen=true]{german}
    } {
        \setdefaultlanguage[variant=german, latesthyphen=true]{german}
        \setotherlanguage[variant=usmax]{english}
    }
}

\ExplSyntaxOff

%%%%%%%%%%%%%%%%%%%%%%
% Shorthand commands %
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\ProvideExpandableDocumentCommand{\aquaheader}{}{
    \setfaculty{Fakultät für Informatik}
    \setchair{Chair of Data Science and Data Engineering}
    \setworkgroup{Prof. Dr. Emmanuel Müller}
}