182 lines
8.7 KiB
PHP
182 lines
8.7 KiB
PHP
<?php
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namespace BassDrive;
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/**
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* BassDrive RSS Feed Generator class
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* @author Markus Birth <markus@birth-online.de>
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*/
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class RSSGenerator
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{
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const RFC_822 = 'D, d M Y H:i:s T';
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const NAMESPACE_URIS = [
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'xmlns' => 'http://www.w3.org/2000/xmlns/',
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'atom' => 'http://www.w3.org/2005/Atom',
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'content' => 'http://purl.org/rss/1.0/modules/content/',
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'itunes' => 'http://www.itunes.com/DTDs/Podcast-1.0.dtd',
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'spotify' => 'http://www.spotify.com/ns/rss',
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'psc' => 'https://podlove.org/simple-chapters/', // for chapter marks
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'dcterms' => 'https://purl.org/dc/terms', // for validity periods
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];
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public function __construct($feed_url, $show_url)
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{
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$this->self_url = $feed_url;
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$this->show_url = $show_url;
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$this->items = array();
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}
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public function setGlobalConfig($config_arr)
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{
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$this->global_conf = $config_arr;
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}
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public function setShowConfig($config_arr)
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{
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$this->show_conf = $config_arr;
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}
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public function setShowIntro($intro_text)
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{
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$this->show_intro = $intro_text;
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}
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public function addItem($url, $title, $size_bytes, $duration_secs, $pub_date)
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{
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array_push($this->items, array(
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'url' => $url,
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'title' => $title,
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'size' => $size_bytes,
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'duration' => $duration_secs,
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'date' => $pub_date,
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));
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}
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public function getRss()
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{
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$dom = new \DOMDocument('1.0', 'utf-8');
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$dom->formatOutput = true;
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$root = $dom->createElement('rss');
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$root->appendChild(new \DOMAttr('version', '2.0'));
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$root->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:atom', self::NAMESPACE_URIS['atom']);
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$root->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:content', self::NAMESPACE_URIS['content']);
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$root->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:itunes', self::NAMESPACE_URIS['itunes']);
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$root->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:spotify', self::NAMESPACE_URIS['spotify']);
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// $root->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:dcterms', self::NAMESPACE_URIS['dcterms']);
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$root->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:psc', self::NAMESPACE_URIS['psc']);
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$dom->appendChild($root);
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$channel = $dom->createElement('channel');
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$channel->appendChild($dom->createElement('title', $this->show_conf['show']['title']));
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$channel->appendChild($dom->createElement('link', $this->show_conf['show']['link']));
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$channel->appendChild($dom->createElement('copyright', $this->show_conf['show']['author']));
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$channel->appendChild($dom->createElement('itunes:author', $this->show_conf['show']['author']));
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$atom_link = $dom->createElement('atom:link');
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$atom_link->appendChild(new \DOMAttr('href', $this->self_url));
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$atom_link->appendChild(new \DOMAttr('rel', 'self'));
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$atom_link->appendChild(new \DOMAttr('type', 'application/rss+xml'));
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$channel->appendChild($atom_link);
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$channel->appendChild($dom->createElement('description', trim(str_replace('&', '&', $this->show_intro))));
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$channel->appendChild($dom->createElement('language', $this->show_conf['show']['language']));
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$image = $dom->createElement('image');
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$image->appendChild($dom->createElement('url', $this->show_url . $this->show_conf['show']['small_logo'])); // RSS spec says max. dimensions are 144x400
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$image->appendChild($dom->createElement('title', $this->show_conf['show']['title']));
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$image->appendChild($dom->createElement('link', $this->show_conf['show']['link']));
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$image->appendChild($dom->createElement('width', $this->show_conf['show']['small_logo_width']));
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$image->appendChild($dom->createElement('height', $this->show_conf['show']['small_logo_height']));
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$channel->appendChild($image);
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$i_image = $dom->createElement('itunes:image');
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$i_image->appendChild(new \DOMAttr('href', $this->show_url . $this->show_conf['show']['big_logo'])); // Apple requires min.(!) size of 1400x1400, 1:1 aspect
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$channel->appendChild($i_image);
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$channel->appendChild($dom->createElement('lastBuildDate', date(self::RFC_822)));
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$channel->appendChild($dom->createElement('docs', 'http://blogs.law.harvard.edu/tech/rss'));
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$channel->appendChild($dom->createElement('generator', 'ew-rss 2020-02-29 by Markus Birth'));
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$channel->appendChild($dom->createElement('managingEditor', $this->global_conf['config']['managing_editor']));
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$channel->appendChild($dom->createElement('webMaster', $this->global_conf['config']['webmaster']));
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$channel->appendChild($dom->createElement('ttl', $this->global_conf['config']['caching_ttl']));
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$i_owner = $dom->createElement('itunes:owner');
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$i_owner->appendChild($dom->createElement('itunes:name', $this->global_conf['config']['itunes_owner_name']));
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$i_owner->appendChild($dom->createElement('itunes:email', $this->global_conf['config']['itunes_owner_email']));
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$channel->appendChild($i_owner);
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$skipDays = $dom->createElement('skipDays');
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$days_on = explode(',', $this->show_conf['show']['schedule_days']);
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if (!in_array('Mo', $days_on)) {
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$skipDays->appendChild($dom->createElement('day', 'Monday'));
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}
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if (!in_array('Tu', $days_on)) {
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$skipDays->appendChild($dom->createElement('day', 'Tuesday'));
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}
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if (!in_array('We', $days_on)) {
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$skipDays->appendChild($dom->createElement('day', 'Wednesday'));
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}
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if (!in_array('Th', $days_on)) {
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$skipDays->appendChild($dom->createElement('day', 'Thursday'));
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}
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if (!in_array('Fr', $days_on)) {
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$skipDays->appendChild($dom->createElement('day', 'Friday'));
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}
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if (!in_array('Sa', $days_on)) {
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$skipDays->appendChild($dom->createElement('day', 'Saturday'));
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}
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if (!in_array('Su', $days_on)) {
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$skipDays->appendChild($dom->createElement('day', 'Sunday'));
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}
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$channel->appendChild($skipDays);
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$i_cat = $dom->createElement('itunes:category');
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$i_cat->appendChild(new \DOMAttr('text', $this->show_conf['show']['category']));
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$channel->appendChild($i_cat);
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$channel->appendChild($dom->createElement('itunes:explicit', $this->show_conf['show']['explicit']));
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$channel->appendChild($dom->createElement('itunes:complete', $this->show_conf['show']['complete']));
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$channel->appendChild($dom->createElement('itunes:type', $this->show_conf['show']['type']));
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//$s_limit = $dom->createElement('spotify:limit');
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//$s_limit->appendChild(new DOMAttr('recentCount', '3')); // At most this number of episodes appear in the client
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//$channel->appendChild($s_limit);
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if (array_key_exists('country_of_origin', $this->show_conf['show'])) {
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// set target market/territory by country, omit for "global"
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$channel->appendChild($dom->createElement('spotify:countryOfOrigin', $this->show_conf['show']['country_of_origin']));
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}
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$latest_date = -1;
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foreach ($this->items as $i) {
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$item = $dom->createElement('item');
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$guid = $dom->createElement('guid', $i['url']);
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$guid->appendChild(new \DOMAttr('isPermalink', 'true')); // guid is a static URL
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$item->appendChild($guid);
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$item->appendChild($dom->createElement('title', $i['title']));
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$enclosure = $dom->createElement('enclosure');
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$enclosure->appendChild(new \DOMAttr('type', 'audio/mpeg'));
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$enclosure->appendChild(new \DOMAttr('length', $i['size']));
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$enclosure->appendChild(new \DOMAttr('url', $i['url']));
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$item->appendChild($enclosure);
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$item->appendChild($dom->createElement('itunes:duration', $i['duration']));
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$dt = explode('-', $i['date']);
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$tt = explode(':', $this->show_conf['show']['schedule_time']);
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$pubDate = mktime($tt[0], $tt[1], $tt[2], $dt[1], $dt[2], $dt[0]);
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$item->appendChild($dom->createElement('pubDate', date(self::RFC_822, $pubDate)));
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if ($pubDate > $latest_date) {
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$latest_date = $pubDate;
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}
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$channel->appendChild($item);
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}
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$channel->appendChild($dom->createElement('pubDate', date(self::RFC_822, $latest_date)));
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$root->appendChild($channel);
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return $dom->saveXML();
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}
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}
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