#!/bin/sh

# Copyright 2022 - 2023 Paul Hänsch
# 
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
# 
# THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
# SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
# IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

. "$_EXEC/cgilite/cgilite.sh"

unset MD_MACROS

if [ "$(which awk)" ]; then
  md() { awk -f "$_EXEC/cgilite/markdown.awk"; }
elif [ "$(which busybox)" ]; then
  md() { busybox awk -f "$_EXEC/cgilite/markdown.awk"; }
else
  md() { cat; }
fi

min="$1" max="$2"
[ "$min" -ge 1 -a "$min" -le 6 ] || min=1
[ "$max" -ge "$min" ] || max="$min"
[ "$max" -le 6 ] || max=6

md |sed -nE '
  1i<ul class="macro toc">
  s;^.*<section class="(h[1-6])( [^"]+)?" id="([^"]*)"><h['${min}-${max}']>(([^<]|<[^aA]|<[aA][^ ])+)(<a class="anchor" href="[^>]*"></a>)?</h[1-6]>$;<li class="toc \1"><a href="#\3">\4</a></li>;p
  $i</ul>
'