Xrhrft

I have created a personal package that contains the definition of a summary box.

This box has an optional argument that is the current school year (highlighted in yellow in the screenshot below).

I would like to be able to calculate the current school year automatically.

• Thus, for a compilation between September 1, 2018 and August 31, 2019, the school year displayed is 2018/2019 by default.


• Otherwise, if this option is set to 2017, it will display as it does today 2017/2018.

How can this be achieved?

The current code is the one of @jbfu's response:

documentclass{article}

usepackage{lipsum}

usepackage{xfrac}

usepackage[most]{tcolorbox}



%%%%%%%%%%%%%%%%%%%%%%%%%%%

% boite resumé



defcouleurresume{red}%



% style du titre « résumé du cours »

tcbset{titreresume/.style={

    boxed title style={

        colframe=couleurresume!50,%

        colback=couleurresume!10,%

        coltext=blue,%

    leftrule=1.5mm,rightrule=1.5mm,toprule=1.5pt,bottom=0pt,boxsep=1pt}}

}



% style des soustitres des résumés

tcbset{soustitre/.style={

    subtitle style={%

    colback=couleurresume!7,%

    colframe=couleurresume!50,%

    boxsep=1mm,

    fontupper={sffamilybfserieslargeselectfontcolor{couleurresume!63!black}}}}

}



% style du titre-boxed des encadrés

tcbset{titrecadre/.style={%

    minipage boxed title*=-.5linewidth,

    boxed title style={

        boxrule=.8pt,boxsep=0pt,toptitle=0pt,

        colframe=couleurresume!55,colback=white},

    halign title=left}

}



% boite créant la boite résumé

newtcolorbox[auto counter]{resume}[2]{%

    minipage boxed title*=-106mm,

    attach boxed title to top center={yshift=-3mm,xshift=-linewidth/5},

    enhanced,

    nobeforeafter,

    lower separated=false,

    before upper={

        textcolor{couleurresume!63!black}{sfrac{#1}{thenumexpr#1+1} hfill{#2}hfillthetcbcounter/ref{nombre-de-resume}}},

    colframe=couleurresume!50,%

    colback=white,%

    coltitle=couleurresume!63!black,%

leftrule=3mm,rightrule=3mm,toprule=2pt,bottomrule=2pt,left=3pt,right=0pt,top=3mm,

fonttitle=sffamilybfserieslarge,

    titreresume,soustitre,title={normalsize Résumé}

}





usepackage{atveryend}

makeatletter

AfterLastShipout{%

  immediatewrite@auxout

  {stringnewlabel{nombre-de-resume}{{thetcb@cnt@resume}{}}}%

}

makeatother

begin{document}



begin{resume}[2018]{chapitre 1}

tcbsubtitle{Définition}



lipsum[1]

end{resume}



newpage



begin{resume}[2018]{chapitre 1}



tcbsubtitle{Propriétés}

lipsum[2]

end{resume}



%showtcbcounter

end{document}

Here is a way with NewDocumentCommand and checking the year and month counter registers.

Apparently a school year is pretty much exactly one year in France (so different to Germany, where it usually begins in August/September and ends in June/July -- school's out for summer is not counted here)

currentschoolyear has one optional argument, tested with IfValueTF -- without the argument, the month is whether it is smaller than 9 if this is the case, it is the time from January to August, so it is the current school year at that period, if month is 9 or larger, the value advances to the next year, i.e. 2019/09/21 would give 2019/2020, whereas 2019/05/21 will return 2018/2019.

NewDocumentCommand{currentschoolyear}{+o}{%

  IfValueTF{#1}{%

    sfrac{#1}{thenumexpr#1+1}%

  }{%

    ifnummonth<9%

    sfrac{thenumexpryear-1}{theyear}%

    else

    sfrac{theyear}{thenumexpryear+1}%

    fi

  }%

}

In order to test for empty arguments from the tcolorbox environment either use ifblank (a etoolbox macro) or switch over to the more sophisticated NewTColorBox macro that allows checks for xparse - like argument specifiers.

month=9 can be used in order to explicitly set the month, if needed.

documentclass{article}

usepackage{lipsum}

usepackage{xfrac}

usepackage[most]{tcolorbox}



NewDocumentCommand{currentschoolyear}{+o}{%

  IfValueTF{#1}{%

    sfrac{#1}{thenumexpr#1+1}

  }{%

    ifnummonth<9%

    sfrac{thenumexpryear-1}{theyear}%

    else

    sfrac{theyear}{thenumexpryear+1}%

    fi

  }%

}



%month=7

%day=31



%%%%%%%%%%%%%%%%%%%%%%%%%%%

% boite resumé



defcouleurresume{red}%



% style du titre « résumé du cours »

tcbset{titreresume/.style={

    boxed title style={

        colframe=couleurresume!50,%

        colback=couleurresume!10,%

        coltext=blue,%

    leftrule=1.5mm,rightrule=1.5mm,toprule=1.5pt,bottom=0pt,boxsep=1pt}}

}



% style des soustitres des résumés

tcbset{soustitre/.style={

    subtitle style={%

    colback=couleurresume!7,%

    colframe=couleurresume!50,%

    boxsep=1mm,

    fontupper={sffamilybfserieslargeselectfontcolor{couleurresume!63!black}}}}

}



% style du titre-boxed des encadrés

tcbset{titrecadre/.style={%

    minipage boxed title*=-.5linewidth,

    boxed title style={

        boxrule=.8pt,boxsep=0pt,toptitle=0pt,

        colframe=couleurresume!55,colback=white},

    halign title=left}

}



% boite créant la boite résumé

newtcolorbox[auto counter]{oldresume}[2]{%

    minipage boxed title*=-106mm,

    attach boxed title to top center={yshift=-3mm,xshift=-linewidth/5},

    enhanced,

    nobeforeafter,

    lower separated=false,

    before upper={

        textcolor{couleurresume!63!black}{ifblank{#1}{currentschoolyear}{currentschoolyear[#1]} hfill{#2}hfillthetcbcounter/ref{nombre-de-resume}}},

%        textcolor{couleurresume!63!black}{sfrac{#1}{thenumexpr#1+1} hfill{#2}hfillthetcbcounter/ref{nombre-de-resume}}},

    colframe=couleurresume!50,%

    colback=white,%

    coltitle=couleurresume!63!black,%

leftrule=3mm,rightrule=3mm,toprule=2pt,bottomrule=2pt,left=3pt,right=0pt,top=3mm,

fonttitle=sffamilybfserieslarge,

    titreresume,soustitre,title={normalsize Résumé}

}



NewTColorBox[auto counter]{resume}{+o+m}{%

    minipage boxed title*=-106mm,

    attach boxed title to top center={yshift=-3mm,xshift=-linewidth/5},

    enhanced,

    nobeforeafter,

    lower separated=false,

    IfValueTF={#1}{%

      before upper={textcolor{couleurresume!63!black}{currentschoolyear[#1] hfill{#2}hfillthetcbcounter/ref{nombre-de-resume}}},

    }{%

      before upper={textcolor{couleurresume!63!black}{currentschoolyear hfill{#2}hfillthetcbcounter/ref{nombre-de-resume}}},

    },

    colframe=couleurresume!50,%

    colback=white,%

    coltitle=couleurresume!63!black,%

leftrule=3mm,rightrule=3mm,toprule=2pt,bottomrule=2pt,left=3pt,right=0pt,top=3mm,

fonttitle=sffamilybfserieslarge,

    titreresume,soustitre,title={normalsize Résumé}

}



usepackage{atveryend}

makeatletter

AfterLastShipout{%

  immediatewrite@auxout

  {stringnewlabel{nombre-de-resume}{{thetcb@cnt@resume}{}}}%

}

makeatother

begin{document}



begin{resume}[2017]{chapitre 1}

tcbsubtitle{Définition}



lipsum[1]

end{resume}



newpage



begin{resume}{chapitre 1}



tcbsubtitle{Propriétés}

lipsum[2]

end{resume}



%showtcbcounter

end{document}