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87 lines
2.8 KiB
PHP
87 lines
2.8 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 OCP\Collaboration\Reference\IReference;
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use OCP\Collaboration\Reference\IReferenceManager;
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use OCP\Collaboration\Reference\IReferenceProvider;
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use OCP\ICache;
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use OCP\ICacheFactory;
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class ReferenceManager implements IReferenceManager {
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public const URL_PATTERN = '/(\s|\n|^)(https?:\/\/)?((?:[-A-Z0-9+_]+\.)+[-A-Z]+(?:\/[-A-Z0-9+&@#%?=~_|!:,.;()]*)*)(\s|\n|$)/mi';
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/** @var IReferenceProvider[] */
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private array $providers = [];
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private ICache $cache;
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private LinkReferenceProvider $linkReferenceProvider;
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public function __construct(LinkReferenceProvider $linkReferenceProvider, FileReferenceProvider $fileReferenceProvider, ICacheFactory $cacheFactory) {
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$this->registerReferenceProvider($fileReferenceProvider);
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$this->linkReferenceProvider = $linkReferenceProvider;
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$this->cache = $cacheFactory->createDistributed('reference');
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}
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public function extractReferences(string $text): array {
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preg_match_all(self::URL_PATTERN, $text, $matches);
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$references = $matches[0] ?? [];
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return array_map(function ($reference) {
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return trim($reference);
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}, $references);
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}
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public function resolveReference(string $referenceId): ?IReference {
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$matchedProvider = null;
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foreach ($this->providers as $provider) {
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$matchedProvider = $provider->matchReference($referenceId) ? $provider : null;
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}
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if ($matchedProvider === null) {
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$matchedProvider = $this->linkReferenceProvider;
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}
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$cacheKey = md5(serialize([
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$matchedProvider->isGloballyCachable() ? 0 : $matchedProvider->getCacheKey($referenceId),
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$referenceId
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]));
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$cached = $this->cache->get($cacheKey);
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if ($cached) {
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return Reference::fromCache($cached);
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}
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$reference = $matchedProvider->resolveReference($referenceId);
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if ($reference) {
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$this->cache->set($cacheKey, Reference::toCache($reference), 60);
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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 registerReferenceProvider(IReferenceProvider $provider): void {
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$this->providers[] = $provider;
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}
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}
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