#!/bin/bash
#
# latex2utf8.sh
#
# Copyright 2023 Beat Jäckle <beat@git.jdmweb2.ch>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

if [ -z $1 ]
then
 echo $0 FILE.tex ; exit 1
else
 file="$1"
fi

if [ $(grep -c 'usepackage[utf8]{inputenc}' "$file") -gt 0 ]
then
 echo It seems this file "$file" is already updated.
 read -p "Should convet anyway? [y/N] " a
 if ! [ {$a}x == "yx" ];then exit 1;fi
fi

if [ "${file:(-8)}" == '.tex.raw' ]
then
 cp "${file}" "${file::(-4)}"
 file="${file::(-4)}"
fi

set -ue

if [ ! -f "${file}.raw" ]
then
 cp "$file" "${file}.raw"
fi

fileType=$(file -bi "${file}")
if [ "$fileType" != "text/x-tex; charset=utf-8" ];
then
 LANG=de_CH iconv -t utf-8 "${file}.raw" -o "$file"
fi

sed -i 's|\\usepackage\[applemac\]{inputenc}|\\usepackage\[utf8\]{inputenc}|g' "$file"
sed -i 's|\\"a|ä|g' "$file"
sed -i 's|\\"o|ö|g' "$file"
sed -i 's|\\"u|ü|g' "$file"
sed -i 's|\\"A|Ä|g' "$file"
sed -i 's|\\"O|Ö|g' "$file"
sed -i 's|\\"U|Ü|g' "$file"
sed -i "s|Ê| |g" "$file"
sed -i "s|Õ|'|g" "$file"
sed -i $'s|\u007c|\'|g' "$file"
sed -i $'s|\u009f|ü|g' "$file" # 9f->ü
sed -i $'s|\u009a|ö|g' "$file"
sed -i $'s|\u008a|ä|g' "$file"
sed -i $'s|\u0086|Ü|g' "$file"
sed -i $'s|\u0080|Ä|g' "$file"
sed -i $'s|\u0085|Ö|g' "$file"

# Diese Zeilen können angepasst werden,
# um gleich ein paar verbesserungen an den Dokumenten vorzunehmen
sed -i 's|\.eps\}|\.pdf\}|g' "$file"
sed -i 's|\\input{/Users/.../MyStyle.tex}|\\usepackage{MyStyle}|g' "$file"
sed -i 's|\\Bild{|\\Bild{img/|g' "$file"
sed -i 's|\\Bildlinks{|\\Bildlinks{img/|g' "$file"
sed -i 's|\\Bildrechts{|\\Bildrechts{img/|g' "$file"
sed -i 's|{img/img/|{img/|g' "$file"