#!/bin/sh
# gophatom.sh -- Atom feeds for gopher
set -e

REPO=$(dirname "$(dirname "$0")")

if [ -z "$1" ] || [ ! -d "$REPO/$1" ]; then
    echo "usage: gophatom.sh phlog|yis" 1>&2
    exit 1
fi

dir=$1
case "$dir" in
    phlog)
        title="Alex Karle's phlog"
        prefix=""
        ;;
    yis)
        title="This Year in Songs"
        prefix="Song of the Week: "
        ;;
esac

cat <<HEADER
<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
  <title>$title</title>
  <id>gopher://alexkarle.com/1/$dir</id>
  <link rel="self" type="application/atom+xml" href="gopher://alexkarle.com/0/$dir/atom.xml"/>
  <link rel="alternate" href="gopher://alexkarle.com/1/$dir"/>
  <author>
    <name>Alex Karle</name>
  </author>
HEADER

IFS='
'
for p in $(grep '^\[0|\[' "$REPO/$dir/index.gph"); do
    if [ -z "$printed_update" ]; then
        printed_update=1
	last=$(git log --pretty="%aI" -- $dir/*.txt | head -n 1)
        printf "  %s\n" "<updated>${last}</updated>"
    fi
    stripped=${p#\[0\|\[}
    stripped=${stripped#*\] }
    title=${stripped%%\|*}
    stripped=${stripped#*\|}
    file=$(basename "${stripped%%\|*}")
    updated=$(git log --pretty="%aI" -- $dir/$file | head -n 1)
    published=$(git log --pretty="%aI" -- $dir/$file | tail -n 1)
    cat <<ENTRY
  <entry>
    <title>${prefix}${title}</title>
    <link rel="alternate" href="gopher://alexkarle.com/0/$dir/${file}"/>
    <id>gopher://alexkarle.com/0/$dir/${file}</id>
    <updated>${updated}</updated>
    <published>${published}</published>
    <content type="text">
    <![CDATA[
ENTRY
    cat "$REPO/$dir/${file}"
    cat <<EOENTRY
    ]]>
    </content>
  </entry>
EOENTRY
done
printf "</feed>\n"