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83 lines
2.5 KiB
PHP
83 lines
2.5 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2022 Julius Härtl <jus@bitgrid.net>
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*
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* @author Julius Härtl <jus@bitgrid.net>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace OC\Collaboration\Reference;
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use Fusonic\OpenGraph\Consumer;
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use OCP\Collaboration\Reference\IReference;
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use OCP\Collaboration\Reference\IReferenceProvider;
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use OCP\Http\Client\IClientService;
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use Psr\Log\LoggerInterface;
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class LinkReferenceProvider implements IReferenceProvider {
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public const URL_PATTERN = '/(\s|^)(https?:\/\/)?((?:[-A-Z0-9+_]+\.)+[-A-Z]+(?:\/[-A-Z0-9+&@#%?=~_|!:,.;()]*)*)(\s|$)/i';
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private IClientService $clientService;
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private LoggerInterface $logger;
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public function __construct(IClientService $clientService, LoggerInterface $logger) {
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$this->clientService = $clientService;
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$this->logger = $logger;
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}
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public function resolveReference(string $referenceText): ?IReference {
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if (preg_match(self::URL_PATTERN, $referenceText)) {
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$reference = new Reference($referenceText);
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$this->fetchReference($reference);
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return $reference;
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}
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return null;
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}
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public function fetchReference(Reference $reference) {
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$client = $this->clientService->newClient();
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try {
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$response = $client->get($reference->getId());
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} catch (\Exception $e) {
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$this->logger->debug('Failed to fetch link for obtaining open graph data', ['exception' => $e]);
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return;
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}
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$responseBody = (string)$response->getBody();
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$reference->setUrl($reference->getId());
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// OpenGraph handling
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$consumer = new Consumer();
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$object = $consumer->loadHtml($responseBody);
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if ($object->title) {
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$reference->setTitle($object->title);
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}
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if ($object->description) {
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$reference->setDescription($object->description);
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}
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if ($object->images) {
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$reference->setImageUrl($object->images[0]->url);
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}
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}
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}
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