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77 lines
2.2 KiB
PHP
77 lines
2.2 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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namespace OC\Group;
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use OCP\Cache\CappedMemoryCache;
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use OCP\EventDispatcher\Event;
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use OCP\EventDispatcher\IEventListener;
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use OCP\Group\Events\GroupChangedEvent;
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use OCP\Group\Events\GroupDeletedEvent;
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use OCP\ICache;
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use OCP\ICacheFactory;
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use OCP\IGroupManager;
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/**
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* Class that cache the relation Group ID -> Display name
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*
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* This saves fetching the group from the backend for "just" the display name
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* @template-implements IEventListener<GroupChangedEvent|GroupDeletedEvent>
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*/
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class DisplayNameCache implements IEventListener {
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private CappedMemoryCache $cache;
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private ICache $memCache;
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private IGroupManager $groupManager;
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public function __construct(ICacheFactory $cacheFactory, IGroupManager $groupManager) {
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$this->cache = new CappedMemoryCache();
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$this->memCache = $cacheFactory->createDistributed('groupDisplayNameMappingCache');
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$this->groupManager = $groupManager;
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}
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public function getDisplayName(string $groupId): ?string {
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if (isset($this->cache[$groupId])) {
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return $this->cache[$groupId];
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}
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$displayName = $this->memCache->get($groupId);
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if ($displayName) {
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$this->cache[$groupId] = $displayName;
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return $displayName;
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}
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$group = $this->groupManager->get($groupId);
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if ($group) {
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$displayName = $group->getDisplayName();
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} else {
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$displayName = null;
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}
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$this->cache[$groupId] = $displayName;
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$this->memCache->set($groupId, $displayName, 60 * 10); // 10 minutes
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return $displayName;
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}
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public function clear(): void {
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$this->cache = new CappedMemoryCache();
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$this->memCache->clear();
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}
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public function handle(Event $event): void {
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if ($event instanceof GroupChangedEvent && $event->getFeature() === 'displayName') {
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$groupId = $event->getGroup()->getGID();
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$newDisplayName = $event->getValue();
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$this->cache[$groupId] = $newDisplayName;
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$this->memCache->set($groupId, $newDisplayName, 60 * 10); // 10 minutes
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}
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if ($event instanceof GroupDeletedEvent) {
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$groupId = $event->getGroup()->getGID();
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unset($this->cache[$groupId]);
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$this->memCache->remove($groupId);
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}
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}
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}
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