#!/bin/sh

#umask 0113
dir="$(echo "$0"|sed 's|/[^/]\+$||')"
if [ -d "$dir" ];then cd "$dir";fi
header="inc/header.html"
footer_start="inc/footer_start.html"
footer_end="inc/footer_end.html"

mdate(){
  date="$(date -u -d "@$(stat -c %Y "$1" )" "+%Y-%m-%dT%H:%MZ")"
  printf "%s<time datetime=%s>%s</time>\n" "${2:-Last Modified: }" "$date" "$(echo "$date"|sed 's/T/ /;s/Z/ UTC/')"
}

# no_ext removes the trailing .html,
# useful to tidy the URL, if you've set up your server to work with that in mind

#server-specific checks to enable stripping suffixes ONLY on system html path, on tilde.cafe
if [ "$(hostname --fqdn)" = "tilde.cafe" ] && [ "$(readlink -f "$dir"|head -c 4)" = "/var" ];then
  no_ext=1
  #if on webroot, try to ignore any discrepancies and use upstream
  echo "updating repo"
  git stash;git stash clear
  git pull
  git submodule update --remote --rebase --single-branch  --recommend-shallow
else
  no_ext=0
fi

TZ=UTC date

echo "generating site"
#. in reference to src/
for path in . ./wiki;do
  tmpindex=$(mktemp --suffix '.md')  # for generating list of markdown links for index.html
  path="src/$path"
  cat "$path/index.md" > $tmpindex

  dir="$(echo $path|cut -d / -f 2-)";

#  find "$path" -maxdepth 1 -name "*.md" -exec sh -c "dir=\"$dir\" tmpindex=\"$tmpindex\""'
  find "$path" -maxdepth 1 -name "*.md"|while read filename;do
#	filename="$(basename "{}"|rev|cut -d . -f 2-|rev)";
	filename="$(basename "$filename"|rev|cut -d . -f 2-|rev)";

	#skip parsing the readme file, case insensitive
	if [ "$(basename "$(echo "$filename"|tr [:upper:] [:lower:])"|rev|cut -d . -f 2-|rev)" = "readme" ];then
	  echo "skipping $filename"
	  continue #skip the file
	fi
	if [ "$dir" = "." ] && [ "$filename" = "index" ];then continue;fi

	if (echo "$dir" | grep "wiki") >/dev/null && (echo "$filename"|grep -v "^index$") >/dev/null;then
	  echo "- [$filename]($filename.html)" >> $tmpindex
	fi

	echo "building dist/$dir/$filename.html";
	mkdir -p "dist/$dir/" && touch "dist/$dir/$filename.html";
	markdown "src/$dir/$filename.md" |
	  if [ "$no_ext" = "1" ];then
	    sed -e 's|\(<a href="https://tilde.cafe/wiki/[^/]\+\).html">|\1">|g'\
	        -e 's|\(<a href="[^/]\+\).html">|\1">|g'
	  else
	    cat
	  fi |
	  cat "$header" - "$footer_start" >"dist/$dir/$filename.html"
	  mdate "src/$dir/$filename.md"|
	  cat - "$footer_end" >>"dist/$dir/$filename.html"
#	' \;
  done

done

echo "creating user list page.."
./users.sh|markdown|
  if [ "$no_ext" = "1" ];then
	  sed -e 's|\(<a href="https://tilde.cafe/banned\).html\(#.*\)\?">|\1\2">|g'
  else cat;fi |
  cat "$header" - "$footer_start" > dist/users.html
  mdate "dist/users.html" "Last Generated: "|
  cat - "$footer_end" >> dist/users.html

echo "creating index page.."
./users.sh|
  cat src/index.md -|markdown|
  if [ "$no_ext" = "1" ];then
	  sed -e 's|\(<a href="https://tilde.cafe/banned\).html\(#.*\)\?">|\1\2">|g'
  else cat;fi |
  cat "$header" - "$footer_start" > dist/index.html
  mdate "dist/index.html" "Last Generated: "|
  cat - "$footer_end" >> dist/index.html

echo "creating index page for wiki..."
markdown "$tmpindex" |
  if [ "$no_ext" = "1" ];then
    sed -e 's|\(<a href="https://tilde.cafe/wiki/[^/]\+\).html">|\1">|g'\
        -e 's|\(<a href="[^/]\+\).html">|\1">|g'
  else
    cat
  fi |
  cat "$header" - "$footer_start" > dist/wiki/index.html
  mdate "dist/wiki/index.html" "Last Generated: "|
  cat - "$footer_end" >> dist/wiki/index.html
rm "$tmpindex"

echo "all done!"

# rsync (flags to delete if src is deleted) dist/ /var/www/tilde.cafe/