416 lines
17 KiB
PHP
416 lines
17 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright 2020 Podlibre
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* @license https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
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* @link https://castopod.org/
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*/
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use App\Entities\Category;
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use App\Entities\Podcast;
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use App\Libraries\SimpleRSSElement;
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use CodeIgniter\I18n\Time;
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use Config\Mimes;
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if (! function_exists('get_rss_feed')) {
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/**
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* Generates the rss feed for a given podcast entity
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*
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* @param string $serviceSlug The name of the service that fetches the RSS feed for future reference when the audio file is eventually downloaded
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* @return string rss feed as xml
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*/
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function get_rss_feed(Podcast $podcast, string $serviceSlug = ''): string
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{
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$episodes = $podcast->episodes;
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$itunesNamespace = 'http://www.itunes.com/dtds/podcast-1.0.dtd';
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$podcastNamespace =
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'https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md';
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$rss = new SimpleRSSElement(
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"<?xml version='1.0' encoding='utf-8'?><rss version='2.0' xmlns:itunes='{$itunesNamespace}' xmlns:podcast='{$podcastNamespace}' xmlns:content='http://purl.org/rss/1.0/modules/content/'></rss>",
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);
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$channel = $rss->addChild('channel');
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$atomLink = $channel->addChild('atom:link', null, 'http://www.w3.org/2005/Atom');
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$atomLink->addAttribute('href', $podcast->feed_url);
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$atomLink->addAttribute('rel', 'self');
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$atomLink->addAttribute('type', 'application/rss+xml');
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if ($podcast->new_feed_url !== null) {
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$channel->addChild('new-feed-url', $podcast->new_feed_url, $itunesNamespace);
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}
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// the last build date corresponds to the creation of the feed.xml cache
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$channel->addChild('lastBuildDate', (new Time('now'))->format(DATE_RFC1123));
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$channel->addChild('generator', 'Castopod Host - https://castopod.org/');
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$channel->addChild('docs', 'https://cyber.harvard.edu/rss/rss.html');
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$channel->addChild('guid', $podcast->guid, $podcastNamespace);
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$channel->addChild('title', $podcast->title, null, false);
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$channel->addChildWithCDATA('description', $podcast->description_html);
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$itunesImage = $channel->addChild('image', null, $itunesNamespace);
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// FIXME: This should be downsized to 1400x1400
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$itunesImage->addAttribute('href', $podcast->image->url);
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$channel->addChild('language', $podcast->language_code);
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if ($podcast->location !== null) {
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$locationElement = $channel->addChild(
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'location',
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htmlspecialchars($podcast->location->name),
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$podcastNamespace,
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);
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if ($podcast->location->geo !== null) {
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$locationElement->addAttribute('geo', $podcast->location->geo);
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}
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if ($podcast->location->osm !== null) {
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$locationElement->addAttribute('osm', $podcast->location->osm);
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}
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}
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if ($podcast->payment_pointer !== null) {
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$valueElement = $channel->addChild('value', null, $podcastNamespace);
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$valueElement->addAttribute('type', 'webmonetization');
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$valueElement->addAttribute('method', '');
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$valueElement->addAttribute('suggested', '');
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$recipientElement = $valueElement->addChild('valueRecipient', null, $podcastNamespace);
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$recipientElement->addAttribute('name', $podcast->owner_name);
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$recipientElement->addAttribute('type', 'ILP');
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$recipientElement->addAttribute('address', $podcast->payment_pointer);
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$recipientElement->addAttribute('split', '100');
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}
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$channel
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->addChild('locked', $podcast->is_locked ? 'yes' : 'no', $podcastNamespace)
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->addAttribute('owner', $podcast->owner_email);
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if ($podcast->imported_feed_url !== null) {
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$channel->addChild('previousUrl', $podcast->imported_feed_url, $podcastNamespace);
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}
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foreach ($podcast->podcasting_platforms as $podcastingPlatform) {
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$podcastingPlatformElement = $channel->addChild('id', null, $podcastNamespace);
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$podcastingPlatformElement->addAttribute('platform', $podcastingPlatform->slug);
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if ($podcastingPlatform->link_content !== null) {
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$podcastingPlatformElement->addAttribute('id', $podcastingPlatform->link_content);
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}
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if ($podcastingPlatform->link_url !== null) {
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$podcastingPlatformElement->addAttribute('url', htmlspecialchars($podcastingPlatform->link_url));
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}
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}
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foreach ($podcast->social_platforms as $socialPlatform) {
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$socialPlatformElement = $channel->addChild(
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'social',
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$socialPlatform->link_content,
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$podcastNamespace,
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);
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$socialPlatformElement->addAttribute('platform', $socialPlatform->slug);
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if ($socialPlatform->link_url !== null) {
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$socialPlatformElement->addAttribute('url', htmlspecialchars($socialPlatform->link_url));
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}
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}
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foreach ($podcast->funding_platforms as $fundingPlatform) {
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$fundingPlatformElement = $channel->addChild(
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'funding',
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$fundingPlatform->link_content,
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$podcastNamespace,
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);
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$fundingPlatformElement->addAttribute('platform', $fundingPlatform->slug);
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if ($fundingPlatform->link_url !== null) {
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$fundingPlatformElement->addAttribute('url', htmlspecialchars($fundingPlatform->link_url));
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}
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}
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foreach ($podcast->persons as $person) {
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foreach ($person->roles as $role) {
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$personElement = $channel->addChild(
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'person',
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htmlspecialchars($person->full_name),
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$podcastNamespace,
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);
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$personElement->addAttribute('img', $person->image->large_url);
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if ($person->information_url !== null) {
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$personElement->addAttribute('href', $person->information_url);
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}
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$personElement->addAttribute(
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'role',
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htmlspecialchars(
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lang("PersonsTaxonomy.persons.{$role->group}.roles.{$role->role}.label", [], 'en'),
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),
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);
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$personElement->addAttribute(
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'group',
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htmlspecialchars(lang("PersonsTaxonomy.persons.{$role->group}.label", [], 'en')),
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);
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}
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}
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// set main category first, then other categories as apple
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add_category_tag($channel, $podcast->category);
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foreach ($podcast->other_categories as $other_category) {
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add_category_tag($channel, $other_category);
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}
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$channel->addChild(
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'explicit',
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$podcast->parental_advisory === 'explicit' ? 'true' : 'false',
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$itunesNamespace,
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);
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$channel->addChild(
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'author',
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$podcast->publisher ? $podcast->publisher : $podcast->owner_name,
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$itunesNamespace,
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);
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$channel->addChild('link', $podcast->link);
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$owner = $channel->addChild('owner', null, $itunesNamespace);
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$owner->addChild('name', $podcast->owner_name, $itunesNamespace);
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$owner->addChild('email', $podcast->owner_email, $itunesNamespace);
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$channel->addChild('type', $podcast->type, $itunesNamespace);
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$podcast->copyright &&
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$channel->addChild('copyright', $podcast->copyright);
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$podcast->is_blocked &&
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$channel->addChild('block', 'Yes', $itunesNamespace);
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$podcast->is_completed &&
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$channel->addChild('complete', 'Yes', $itunesNamespace);
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$image = $channel->addChild('image');
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$image->addChild('url', $podcast->image->feed_url);
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$image->addChild('title', $podcast->title, null, false);
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$image->addChild('link', $podcast->link);
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if ($podcast->custom_rss !== null) {
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array_to_rss([
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'elements' => $podcast->custom_rss,
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], $channel);
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}
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foreach ($episodes as $episode) {
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$item = $channel->addChild('item');
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$item->addChild('title', $episode->title, null, false);
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$enclosure = $item->addChild('enclosure');
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$enclosure->addAttribute(
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'url',
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$episode->audio_file_analytics_url .
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($serviceSlug === ''
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? ''
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: '?_from=' . urlencode($serviceSlug)),
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);
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$enclosure->addAttribute('length', (string) $episode->audio_file_size);
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$enclosure->addAttribute('type', $episode->audio_file_mimetype);
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$item->addChild('guid', $episode->guid);
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$item->addChild('pubDate', $episode->published_at->format(DATE_RFC1123));
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if ($episode->location !== null) {
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$locationElement = $item->addChild(
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'location',
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htmlspecialchars($episode->location->name),
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$podcastNamespace,
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);
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if ($episode->location->geo !== null) {
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$locationElement->addAttribute('geo', $episode->location->geo);
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}
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if ($episode->location->osm !== null) {
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$locationElement->addAttribute('osm', $episode->location->osm);
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}
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}
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$item->addChildWithCDATA('description', $episode->getDescriptionHtml($serviceSlug));
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$item->addChild('duration', (string) $episode->audio_file_duration, $itunesNamespace);
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$item->addChild('link', $episode->link);
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$episodeItunesImage = $item->addChild('image', null, $itunesNamespace);
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$episodeItunesImage->addAttribute('href', $episode->image->feed_url);
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$episode->parental_advisory &&
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$item->addChild(
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'explicit',
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$episode->parental_advisory === 'explicit'
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? 'true'
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: 'false',
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$itunesNamespace,
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);
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$episode->number &&
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$item->addChild('episode', (string) $episode->number, $itunesNamespace);
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$episode->season_number &&
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$item->addChild('season', (string) $episode->season_number, $itunesNamespace);
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$item->addChild('episodeType', $episode->type, $itunesNamespace);
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// add link to episode comments as podcast-activity format
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$comments = $item->addChild('comments', null, $podcastNamespace);
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$comments->addAttribute('uri', url_to('episode-comments', $podcast->handle, $episode->slug));
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$comments->addAttribute('contentType', 'application/podcast-activity+json');
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if ($episode->transcript_file_url) {
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$transcriptElement = $item->addChild('transcript', null, $podcastNamespace);
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$transcriptElement->addAttribute('url', $episode->transcript_file_url);
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$transcriptElement->addAttribute(
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'type',
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Mimes::guessTypeFromExtension(
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pathinfo($episode->transcript_file_url, PATHINFO_EXTENSION)
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) ?? 'text/html',
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);
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$transcriptElement->addAttribute('language', $podcast->language_code);
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}
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if ($episode->chapters_file_url) {
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$chaptersElement = $item->addChild('chapters', null, $podcastNamespace);
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$chaptersElement->addAttribute('url', $episode->chapters_file_url);
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$chaptersElement->addAttribute('type', 'application/json+chapters');
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}
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foreach ($episode->soundbites as $soundbite) {
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$soundbiteElement = $item->addChild('soundbite', $soundbite->label, $podcastNamespace);
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$soundbiteElement->addAttribute('start_time', (string) $soundbite->start_time);
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$soundbiteElement->addAttribute('duration', (string) $soundbite->duration);
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}
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foreach ($episode->persons as $person) {
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foreach ($person->roles as $role) {
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$personElement = $item->addChild(
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'person',
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htmlspecialchars($person->full_name),
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$podcastNamespace,
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);
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$personElement->addAttribute(
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'role',
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htmlspecialchars(
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lang("PersonsTaxonomy.persons.{$role->group}.roles.{$role->role}.label", [], 'en'),
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),
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);
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$personElement->addAttribute(
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'group',
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htmlspecialchars(lang("PersonsTaxonomy.persons.{$role->group}.label", [], 'en')),
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);
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$personElement->addAttribute('img', $person->image->large_url);
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if ($person->information_url !== null) {
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$personElement->addAttribute('href', $person->information_url);
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}
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}
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}
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$episode->is_blocked &&
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$item->addChild('block', 'Yes', $itunesNamespace);
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if ($episode->custom_rss !== null) {
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array_to_rss([
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'elements' => $episode->custom_rss,
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], $item);
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}
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}
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return $rss->asXML();
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}
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}
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if (! function_exists('add_category_tag')) {
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/**
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* Adds <itunes:category> and <category> tags to node for a given category
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*/
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function add_category_tag(SimpleXMLElement $node, Category $category): void
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{
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$itunesNamespace = 'http://www.itunes.com/dtds/podcast-1.0.dtd';
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$itunesCategory = $node->addChild('category', '', $itunesNamespace);
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$itunesCategory->addAttribute(
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'text',
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$category->parent !== null
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? $category->parent->apple_category
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: $category->apple_category,
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);
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if ($category->parent !== null) {
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$itunesCategoryChild = $itunesCategory->addChild('category', '', $itunesNamespace);
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$itunesCategoryChild->addAttribute('text', $category->apple_category);
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$node->addChild('category', $category->parent->apple_category);
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}
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$node->addChild('category', $category->apple_category);
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}
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}
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if (! function_exists('rss_to_array')) {
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/**
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* Converts XML to array
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*
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* FIXME: param should be SimpleRSSElement
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*
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* @return array<string, mixed>
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*/
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function rss_to_array(SimpleXMLElement $rssNode): array
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{
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$nameSpaces = [
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'',
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'http://www.itunes.com/dtds/podcast-1.0.dtd',
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'https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md',
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];
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$arrayNode = [];
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$arrayNode['name'] = $rssNode->getName();
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$arrayNode['namespace'] = $rssNode->getNamespaces(false);
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foreach ($rssNode->attributes() as $key => $value) {
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$arrayNode['attributes'][$key] = (string) $value;
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}
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$textcontent = trim((string) $rssNode);
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if (strlen($textcontent) > 0) {
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$arrayNode['content'] = $textcontent;
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}
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foreach ($nameSpaces as $currentNameSpace) {
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foreach ($rssNode->children($currentNameSpace) as $childXmlNode) {
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$arrayNode['elements'][] = rss_to_array($childXmlNode);
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}
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}
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return $arrayNode;
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}
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}
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if (! function_exists('array_to_rss')) {
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/**
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* Inserts array (converted to XML node) in XML node
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*
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* @param array<string, mixed> $arrayNode
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* @param SimpleRSSElement $xmlNode The XML parent node where this arrayNode should be attached
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*/
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function array_to_rss(array $arrayNode, SimpleRSSElement &$xmlNode): SimpleRSSElement
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{
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if (array_key_exists('elements', $arrayNode)) {
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foreach ($arrayNode['elements'] as $childArrayNode) {
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$childXmlNode = $xmlNode->addChild(
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$childArrayNode['name'],
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$childArrayNode['content'] ?? null,
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$childArrayNode['namespace'] === []
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? null
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: current($childArrayNode['namespace'])
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);
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if (array_key_exists('attributes', $childArrayNode)) {
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foreach (
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$childArrayNode['attributes']
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as $attributeKey => $attributeValue
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) {
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$childXmlNode->addAttribute($attributeKey, $attributeValue);
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}
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}
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array_to_rss($childArrayNode, $childXmlNode);
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}
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}
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return $xmlNode;
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}
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}
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