$extra_comments[] = "Region Filter: " . $_GET["region"];
}
// This might be needed for caching in the future
// $cache_key = ($internal ? "INT_" : "EXT_") . ($atom_mode ? "ATOM_" : "PACK_") . ($newsstand_mode ? "NEWS" : "OPDS");
$extra_comments[] = "Status: {$status}. Number of editions to include: " . pugpig_get_num_editions();
$editions = pugpig_get_editions($status, pugpig_get_num_editions());
$edition_ids = array();
$modified = null;
foreach ($editions as $edition) {
    if (pugpig_should_keep_edition_in_feed($edition)) {
        $edition_ids[] = $edition->ID;
        $atom_timestamp = pugpig_get_page_modified($edition);
        if ($atom_mode) {
            $this_time = $atom_timestamp;
        } else {
            $package_timestamp = pugpig_get_edition_update_date(pugpig_get_edition($edition->ID), false);
            $this_time = max($package_timestamp, $atom_timestamp);
            // so cover changes etc. are picked up
        }
        if ($modified == NULL || $modified < $this_time) {
            $modified = $this_time;
        }
    }
}
pugpig_set_cache_headers($modified, $ttl);
$d = pugpig_get_opds_container($edition_ids, $internal, $atom_mode, $newsstand_mode, $extra_comments);
// Add any static OPDS entries to the feed
$entry_xml_string = pugpig_get_extra_opds_entries();
if (!empty($entry_xml_string)) {
    $fragment = $d->createDocumentFragment();
    $fragment->appendChild($d->createComment("Adding static entries from pugpig_static_entry_xml setting"));
function pugpig_get_rss_root($edition_id)
{
    $edition = pugpig_get_edition($edition_id, false);
    $d = new DomDocument('1.0', 'UTF-8');
    $feed = $d->createElement('rss');
    $feed->setAttribute('version', '2.0');
    $channel = $d->createElement('channel');
    $feed->appendChild($channel);
    $channel->appendChild(newElement($d, 'title', $edition['title']));
    $channel->appendChild(newElement($d, 'link', pugpig_self_link()));
    $channel->appendChild(newElement($d, 'pubDate', pugpig_date_kindle(pugpig_get_edition_update_date($edition, true))));
    $item = null;
    foreach (pugpig_get_kindle_page_array($edition) as $page) {
        if ($page['level'] == 1) {
            $item = $d->createElement('item');
            $abs_path = pugpig_abs_link('editions/' . pugpig_get_atom_tag($edition['key']) . '/data/' . $page['id'] . '/kindle.rss');
            $item->appendChild(newElement($d, 'link', $abs_path));
            // $channel->appendChild($item);
        }
        // If we have a Level 1 node, attach it once we know we have a child
        // Having a section without any children breaks everything
        if ($page['level'] > 1 && $item != null) {
            // print_r($page['title']);
            $channel->appendChild($item);
            $item = null;
        }
    }
    $d->appendChild($feed);
    return $d;
}