#!/usr/bin/env bash
# HEADER
#=======================================================================
#
#  panpdf -- Get a quick access to generate PDF from text files.
#
#  SYNOPSIS
#    panpdf [options] [infile]
#
#  DESCRIPTION
#    Shell script to get PDF from markdown or text files.
#
#  OPTIONS
#    -h|--help            display this help and exit
#    10pt|12pt            font size
#    a5|A5                format on A5 paper
#    a5l|A5L              format as landscape on A5 paper
#    en                   babel in english
#    fr                   babel in french (default)
#    --no-num             unumbered sections
#    --toc                print table of contents
#
#  EXAMPLES
#    $ panpdf <infile.pdf>
#    $ pdfprint --no-num <infile.pdf>
#    $ pdfprint --toc <infile.pdf>
#
#  DEPENDENCIES
#    - pandoc >= 1.17.2
#    - pdflatex
#    - GNU coreutils
#
#  INSTALLATION
#     - copy "latex.template" to "/home/$(whoami)/.pandoc/"
#     - copy file to "/home/$(whoami)/bin"
#     - add line "complete -f -X '!*.md' panpdf
#       to "/home/$(whoami)/.bashrc"
# 
# 
#  Copyright (C) 2019-2021 Nicolas Mesnier <nmesnier@free.fr>
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License version 3 or
#  above as published by the Free Software Foundation.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program. If not, see <http://www.gnu.org/licenses/>.
#
#=======================================================================
# END_OF_HEADER
#-----------------------------------------------------------------------
#-----------------------------------------------------------------------
# *** read this header to display help
#-----------------------------------------------------------------------
BOH=$(head -200 ${0} | grep -n "^# HEADER" | cut -f1 -d:)
EOH=$(head -200 ${0} | grep -n "^# END_OF_HEADER" | cut -f1 -d:)
function Help(){
  head -$(($EOH-1)) ${0} | tail -$(($EOH-$BOH-1)) \
    | grep -e "^#$" -e "^# " | sed -e "s/^#=*//g" 
}
#-----------------------------------------------------------------------
# *** default options
GEOM="--variable geometry:a4paper,textwidth=160mm,textheight=247mm,"
GEOM+="centering,includefoot"
FONT=" --variable fontsize:11pt"
LANG="--variable lang:fr-FR --variable babel-lang:frenchb"
NUM="--variable numbersections:true"
TOC=""
infile=""
# *** read options
while [[ ${1} ]]; do
    case "${1}" in
        -h|--help ) 
            Help
            exit 0 ;;
        10pt)
            FONT=" --variable fontsize:10pt"
            ;;
        12pt)
            FONT=" --variable fontsize:12pt"
            ;;
        A5L|a5l)
            GEOM="--variable geometry:a5paper,landscape,"
            GEOM+="textwidth=160mm,textheight=123mm,centering,"
            GEOM+="includefoot"
            ;;
        A5|a5)
            GEOM="--variable geometry:a5paper,"
            GEOM+="textwidth=120mm,textheight=160mm,centering,"
            GEOM+="includefoot"
            ;;
        en)
            LANG="--variable lang:en --variable babel-lang:english"
            ;;
        fr)
            LANG="--variable lang:fr --variable babel-lang:french"
            ;;
        --no-num)
            NUM=""
            ;;
        --toc)
            TOC="--variable toc:true --variable toccolor:red"
            TOC+=" --toc-depth=2"
            ;;
        *)
            if [ -f ${1} ];then
                infile=${1}
            else
                echo "File \"${1}\" does not exists." >&2
                exit 1
            fi
            ;;
    esac
    if ! shift; then
        echo 'Missing parameter argument.' >&2
        exit 1
    fi
done
# filename
filename=$(basename $infile .${infile##*.})
# use pandoc for markdow conversion to tex
pandoc $infile \
    --variable documentclass:article \
    ${GEOM} ${FONT} ${LANG} ${NUM} ${TOC}\
    --highlight-style haddock \
    --variable colorlinks:true \
    --variable linkcolor:red \
    --variable urlcolor:blue \
    --variable filecolor:blue \
    --template=/home/$(whoami)/.pandoc/latex.template \
     -s -o $filename.tex
# remove option for french spaces
sed -i 's/shorthands=off,//g' $filename.tex 
# compile tex (quietly)
for i in $(seq 1 3);do
    pdflatex $filename.tex 2>&1 1>/dev/null
done
# purge
extensions=(".aux" ".bbl" ".blg" ".dvi" ".log" ".mtc*" ".nav" \
 ".out" ".ptc*" ".snm" ".spl" ".toc" ".tex")
for extension in "${extensions[@]}";do
    find -maxdepth 1 -type f -name "${filename}${extension}" -delete
done
#====================================================================eof
# vim: set tw=72 ts=4 sw=4 nu: