#!/bin/sh

TEMP=$(mktemp -d)
IFS=$'\n'
cp header.tex "${TEMP}/header.tex"

( echo "\\newcommand{\\doctitle}{Lineare Algebra 1 (Stand: $(date +'%d.%m.%Y'))}"; \
  sed 's/\\chead{\\doctitle}//g' header.tex; \
  echo "\\title{Komplette Mitschriebe zur Linearen Algebra bei Herr Banagl}
\\author{Michael Stapelberg}
\\date{Stand: $(date +'%d.%m.%Y')}
\\maketitle
\\tableofcontents
\\clearpage" ) > "${TEMP}/la1.tex"

for folder in $(find * -name la1.tex -printf "%h %p\n" |
		sed 's/^\([0-9]\{2\}\).\([0-9]\{2\}\).\([0-9]\{4\}\)/\3-\2-\1/g' |
		sort)
do
	IFS=$' '
	set -- $folder
	sed -e 's/\\newcommand{\\doctitle}/\\section/g;
		s/\\include{header}//g;
		s/\\end{document}//g;
		s/\\section\*/\\subsection/g;
		s/\\subsection\*/\\subsubsection/g' $2 > ${TEMP}/$1.tex
	echo "\\include{$1}" >> "${TEMP}/la1.tex"
done

echo "\\end{document}" >> "${TEMP}/la1.tex"

cd "${TEMP}"
pdflatex la1.tex && pdflatex la1.tex

cd -
cp "${TEMP}/la1.pdf" .

rm -rf "${TEMP}"