#!/bin/sh

# Copyright 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.

. "$_EXEC/cgilite/cgilite.sh"
. "$_EXEC/tools.sh"
. "$_EXEC/acl.sh"

_(){ printf %s\\n "$*"; }
[ "${LANGUAGE}" -a -r "${_EXEC}/l10n/${LANGUAGE}.sh" ] && . "${_EXEC}/l10n/${LANGUAGE}.sh"

LANGUAGES='' glob="/" depth=-1
set -- "$@" --
while [ $# -gt 0 ]; do case $1 in
  --system) glob_system_pages=true; shift 1;;
  :*) LANGUAGES="${LANGUAGES}${LANGUAGES:+ }${1#:}"; shift 1;;
  --depth) depth="$2"; shift 2;;
  --) shift 1; break;;
  *) set -- "$@" "$1"; shift 1;;
esac; done
[ "$*" ] || set -- /

page='' page_abs='' ostamp='' odate='' lstamp='' ldate='' row='' rowstate=''

printf '<table class="macro changes"><thead>\n<th>Page</th>'
for l in $LANGUAGES; do printf '<th>%s</th>' "$l"; done
printf '\n</thead><tbody>\n'

for glob in "$@"; do
  page_glob "$glob" "$depth" 
done \
| sort -u \
| while read page; do
  page_abs="$(page_abs "$page")"
  acl_read "${page_abs}" || continue
  mdfile "${page_abs}" >&- || continue

  read ostamp odate <<-EOF
	$([ "$REV_PAGES" = true ] \
	  && git -C "$_DATA" log --pretty="format:%at %ai" -- "pages${page_abs}#page.md" \
	  || stat -c "%Y %y" -- "$_DATA/pages${page_abs}#page.md" 2>&- \
	  || printf "0 %s\n" "$(_ "(never edited)")"
	)
	EOF
  row="<td><a href=\"$(HTML "$page")\">$(HTML "$page")</a><span class=\"date\">${odate%%[+.]*}</span></td>"
  rowstate=''
 
  for l in $LANGUAGES; do
    if [ -f "${_DATA}/pages/${page}:${l}/#page.md" ]; then
      read lstamp ldate <<-EOF
	$([ "$REV_PAGES" = true ] \
	  && git -C "$_DATA" log --pretty="format:%at %ai" -- "pages$(page_abs "${page_abs}:${l}")/#page.md" \
	  || stat -c "%Y %y" -- "$_DATA/pages$(page_abs "${page_abs}:${l}")/#page.md"
	)
	EOF
      if [ $lstamp -lt $ostamp ] 2>&-; then
        row="${row}<td class=\"outdated\"><a href=\"$(HTML "${page}:${l}")\">$(_ outdated)</a><span class=\"date\">${ldate%%[+.]*}</span></td>"
        [ "$rowstate" = "${rowstate%*outdated*}" ] && rowstate="${rowstate}${rowstate:+ }outdated"
      else
        row="${row}<td class=\"current\" ><a href=\"$(HTML "${page}:${l}")\">$(_ current)</a ><span class=\"date\">${ldate%%[+.]*}</span></td>"
        [ "$rowstate" = "${rowstate%*current*}" ] && rowstate="${rowstate}${rowstate:+ }current"
      fi
    else
      row="${row}<td class=\"missing\"><a href=\"$(HTML "${page}:${l}")\">$(_ missing)</a></td>"
      [ "$rowstate" = "${rowstate%*missing*}" ] && rowstate="${rowstate}${rowstate:+ }missing"
    fi
  done

  printf '<tr class="%s">%s</tr>\n' "$rowstate" "$row"
done

printf '</tbody></table>'