#!/usr/bin/env bash

# Generate the feed file
declare blog_feed
declare date_format_full
declare global_title
declare global_url
declare global_description
declare index_file
declare number_of_feed_articles
declare cut_do
make_rss() {
  
    echo -n "Making RSS "

    rssfile=$blog_feed.$RANDOM
    while [[ -f $rssfile ]]; do rssfile=$blog_feed.$RANDOM; done

    {
        pubdate=$(LC_ALL=C date +"$date_format_full")
        echo '<?xml version="1.0" encoding="UTF-8" ?>'
        echo '<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/">'
        echo "<channel><title>$global_title</title><link>$global_url/$index_file</link>"
        echo "<description>$global_description</description><language>en</language>"
        echo "<lastBuildDate>$pubdate</lastBuildDate>"
        echo "<pubDate>$pubdate</pubDate>"
        echo "<atom:link href=\"$global_url/$blog_feed\" rel=\"self\" type=\"application/rss+xml\">"

        n=0
        while IFS='' read -r i; do
            is_boilerplate_file "$i" && continue
            ((n >= number_of_feed_articles)) && break # max 10 items
            echo -n "." 1>&3
            echo '<item><title>'
            get_post_title "$i"
            echo '</title><description><![CDATA['
            get_html_file_content 'text' 'entry' "$cut_do" <"$i"
            echo "]]></description><link>$global_url/${i#./}</link>"
            echo "<guid>$global_url/$i</guid>"
            echo "<dc:creator>$(get_post_author "$i")</dc:creator>"
            echo "<pubDate>$(LC_ALL=C date -r "$i" +"$date_format_full")</pubDate></item>"

            n=$((n + 1))
        done < <(ls -t ./*.html)

        echo '</channel></rss>'
    } 3>&1 >"$rssfile"
    echo ""

    mv "$rssfile" "$blog_feed"
    chmod 644 "$blog_feed"
}