#!/bin/bash
set -e

# global
pd=/usr/bin/pandoc
g=/bin/grep
tr=/usr/bin/tr
sed=/bin/sed
sort=/usr/bin/sort

postDir=/home/vilmibm/blog/posts

htmlDir=/home/vilmibm/public_html/blog
htmlIndexTmpl=/home/vilmibm/blog/index.tmpl.html
htmlIndex=/home/vilmibm/public_html/blog/index.html

gopherPath=/home/vilmibm/public_gopher/blog
gopherIndex="${gopherPath}/gophermap"

geminiPath=/home/vilmibm/public_gemini/blog
geminiIndex="${geminiPath}/index.gmi"

cd $postDir > /dev/null

# backup HTML index
if [ -e "${htmlIndex}" ]
then
  cp $htmlIndex "${htmlIndex}.bak"
fi

cp $htmlIndexTmpl $htmlIndex

# Remove old gopher posts
rm ${gopherPath}/*

# Initialize blog gophermap
echo "!the phlog of vilmibm as it were" > $gopherIndex
echo >> $gopherIndex

# Initialize blog index for gemini
echo "the gemblog of vilmibm as it were" > $geminiIndex
echo >> $geminiIndex

for p in $(ls *.md | $sort -r)
do
  pubdate=$($g "pubdate:" $p | $sed 's/pubdate: //')
  title=$($g "title:" $p | $sed 's/title: //')
  slug=$($g "slug:" $p | $sed 's/slug: //' | $tr -d \[:blank:\])
  if [ -z "$pubdate" ] || [ -z "$title" ] || [ -z "$slug" ]
  then
    echo "warning: missing at least one of: pubdate, slug, title in ${p}"
  else
    # HTML
    echo "<h2 class=\"title\">${title}</h2>" >> $htmlIndex
    echo "<a class=\"pubdate\" name=\"${slug}\" href=\"https://tilde.town/~vilmibm/blog#${slug}\">${pubdate}</a>" >> $htmlIndex
    echo "<div class=\"post\">" >> $htmlIndex
    $g -v "pubdate:" $p | $g -v "title:" | $g -v "slug:" |$pd -fmarkdown -thtml >> $htmlIndex
    echo "</div>" >> $htmlIndex

    # Gopher
    echo "0${title}	${slug}.txt" >> $gopherIndex
    gopherPostPath="${gopherPath}/${slug}.txt"
    echo "# ${title}" > $gopherPostPath
    echo >> $gopherPostPath
    echo "_published ${pubdate}_" >> $gopherPostPath
    $g -v "pubdate:" $p | $g -v "title:" | $g -v "slug:" >> $gopherPostPath

    # Gemini
    echo "=> gemini://tilde.town/~vilmibm/blog/${slug}.gmi ${title}" >> $geminiIndex
    geminiPostPath="${geminiPath}/${slug}.gmi"
    echo "# ${title}" > $geminiPostPath
    echo >> $geminiPostPath
    echo "_published ${pubdate}_" >> $geminiPostPath
    $g -v "pubdate:" $p | $g -v "title:" | $g -v "slug:" >> $geminiPostPath
  fi
done

echo "</body></html>" >> $htmlIndex