#!/bin/bash

# Path to directory where this script is
# https://stackoverflow.com/a/246128/98600
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"

# Render txt2tags into html file
# Arguments:
# 1. txt2tags source file, e.g. download/index.t2t
# 2. html target filen, e.g. download/index.html
function render_html {
  t2t=$1
  html=$2
  relroot="$( dirname $t2t | sed -E 's/^.\///' | sed -E 's/[^/]+/../g' )"
  pandoc \
    --from=t2t \
    --to=html5 \
    --standalone \
    --template="$DIR/_template.html" \
    --variable="rel-root:$relroot" \
    "$t2t" \
    --output="$html"
  if [ -f "$html" ] ; then
    sed -i.bak "s/<table>/<table class=\"table\">/" "$html" && rm "$html.bak"
    sed -i.bak -E "s/\`\`(.+)\`\`/<code>\1<\/code>/g" "$html" && rm "$html.bak"
    echo "$html"
  else
    echo "Error creating $html"
  fi
}

if [ $# -gt 0 ] ; then
  # Render specific file(s) from args, ignoring dates
  for t2t in "$@" ; do
    html="${t2t%.t2t}.html"
    render_html "$t2t" "$html"
  done
else
  # Render all files found in cwd, and below, if source is newer
  find . -name '*.t2t' | while read t2t ; do
    html="${t2t%.t2t}.html"
    if [ "$t2t" -nt "$html" ] ; then
      render_html "$t2t" "$html"
    fi
  done
fi