#!/usr/bin/env bash

# create a gopher rss feed

phloglink="gopher://spike.nagatha.fr/0/phlog"
description="Phil's Phlog"
rsslink=gopher://spike.nagatha.fr/phlog/rss.xml
feedname=$HOME/src/gopher/phlog/rss.xml
postDir=$HOME/src/gopher/phlog
updated=$(date --iso-8601=ns)

# Build RSS header & footer
header () {
echo "<?xml version='1.0' encoding='UTF-8' ?>
<rss version='2.0' xmlns:atom='http://www.w3.org/2005/Atom'>" > ~/feedtop
echo "
<channel>
<title>Phil&#39;s Phlog</title>
<link>gopher://spike.nagatha.fr</link>
<description>A Gopher phlog from Brittany, France</description>
<lastBuildDate>$updated</lastBuildDate>
<atom:link href='$rsslink' rel='self' type='application/rss+xml' />
" >> ~/feedtop
}

footer () {
echo "
</channel>
</rss>
" >> ~/feedbottom
}

# Function: Build Item add to feed

item () {
  echo "<item>
  <title>$fullTitle</title>
  <pubDate>$postdate</pubDate>
  <link>$linkadd</link>
  <guid>$linkadd</guid>
  <description>$description</description>
</item>" >> ~/feed
}

# Function: Concatenate everything

combine () {
        header
        footer
        cat ~/feedtop ~/feed > ~/feedtb
        cat ~/feedtb ~/feedbottom > $feedname
        rm ~/feedtop ~/feed ~/feedtb ~/feedbottom
}

# Run through files and create rss.xml

if [[ -f $feedname ]]; then
  rm $feedname
fi
touch $feedname
mapfile -t postArray < <(ls -t "$postDir"/*.txt)
postNum=0
for posts in "${postArray[@]}"; do
  ((postNum+=1))
  post=$posts
  fullTitle=$(head -n1 "$post" | sed 's/title://g')
  postdate=$(cat $post | sed -n '2p' | sed 's/date://g')
  postname=${post##*/}
  linkadd="$phloglink/$postname"
  description="$(cat $post | sed -n "/^$/,/^$/p" | head --lines 3) …"
  item "$post"
done
  combine
exit