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<?php |
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declare(strict_types=1); |
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/** |
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* @copyright Copyright 2022 Carl Schwan <[email protected]> |
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* @license AGPL-3.0-or-later |
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* |
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* This code 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, version 3, |
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* as published by the Free Software Foundation. |
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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, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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namespace OC\User; |
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use OCP\EventDispatcher\Event; |
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use OCP\EventDispatcher\IEventListener; |
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use OCP\ICache; |
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use OCP\ICacheFactory; |
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use OCP\IUserManager; |
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use OCP\User\Events\UserChangedEvent; |
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/** |
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* Class that cache the relation UserId -> Display name |
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* |
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* This saves fetching the user from a user backend and later on fetching |
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* their preferences. It's generally not an issue if this data is slightly |
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* outdated. |
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*/ |
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class DisplayNameCache implements IEventListener { |
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private ICache $internalCache; |
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private IUserManager $userManager; |
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public function __construct(ICacheFactory $cacheFactory, IUserManager $userManager) { |
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$this->internalCache = $cacheFactory->createDistributed('displayNameMappingCache'); |
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$this->userManager = $userManager; |
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} |
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public function getDisplayName(string $userId) { |
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$displayName = $this->internalCache->get($userId); |
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if ($displayName) { |
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return $displayName; |
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} |
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$user = $this->userManager->get($userId); |
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if ($user) { |
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$displayName = $user->getDisplayName(); |
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} else { |
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$displayName = $userId; |
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} |
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$this->internalCache->set($userId, $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->internalCache->clear(); |
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} |
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public function handle(Event $event): void { |
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if ($event instanceof UserChangedEvent && $event->getFeature() === 'displayName') { |
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$userId = $event->getUser()->getUID(); |
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$newDisplayName = $event->getValue(); |
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$this->internalCache->set($userId, $newDisplayName, 60 * 10); // 10 minutes |
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} |
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} |
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} |
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nextcloud /
server
