78 lines
2.0 KiB
PHP
78 lines
2.0 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace OCA\GPodderSync\Service;
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use DateTime;
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use SimpleXMLElement;
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use OCP\Http\Client\IClient;
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use OCP\Http\Client\IClientService;
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use OCP\ICache;
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use OCP\ICacheFactory;
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class PodcastCacheService {
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private ?ICache $cache = null;
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private IClient $httpClient;
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public function __construct(
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ICacheFactory $cacheFactory,
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IClientService $httpClientService,
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) {
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if ($cacheFactory->isLocalCacheAvailable()) {
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$this->cache = $cacheFactory->createLocal('GPodderSync-Podcasts');
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}
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$this->httpClient = $httpClientService->newClient();
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}
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public function getCachedOrFetchPodcastData(string $url) {
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if ($this->cache == null) {
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return $this->fetchPodcastData($url);
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}
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$oldData = $this->cache->get($url);
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if ($oldData) {
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return $oldData;
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}
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$newData = $this->fetchPodcastData($url);
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$this->cache->set($url, $newData);
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return $newData;
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}
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public function fetchPodcastData(string $url) {
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$resp = $this->httpClient->get($url);
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$statusCode = $resp->getStatusCode();
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if ($statusCode < 200 || $statusCode >= 300) {
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throw new ErrorException("Podcast RSS URL returned non-2xx status code: $statusCode");
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}
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$body = $resp->getBody();
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$xml = new SimpleXMLElement($body);
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$channel = $xml->channel;
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return [
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'title' => (string)$channel->title,
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'author' => self::getXPathContent($xml, '/rss/channel/itunes:author'),
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'link' => (string)$channel->link,
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'description' => (string)$channel->description,
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'image' =>
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self::getXPathContent($xml, '/rss/channel/image/url')
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?? self::getXPathAttribute($xml, '/rss/channel/itunes:image/@href'),
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'fetchedAtUnix' => (new DateTime())->getTimestamp(),
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];
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}
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private static function getXPathContent(SimpleXMLElement $xml, string $xpath) {
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$match = $xml->xpath($xpath);
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if ($match) {
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return (string)$match[0];
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}
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return null;
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}
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private static function getXPathAttribute(SimpleXMLElement $xml, string $xpath) {
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$match = $xml->xpath($xpath);
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if ($match) {
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return (string)$match[0][0];
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}
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return null;
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}
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}
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