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- <?php
- declare(strict_types=1);
- namespace OC\User;
- use OCP\EventDispatcher\Event;
- use OCP\EventDispatcher\IEventListener;
- use OCP\ICache;
- use OCP\ICacheFactory;
- use OCP\IUserManager;
- use OCP\User\Events\UserChangedEvent;
- use OCP\User\Events\UserDeletedEvent;
- class DisplayNameCache implements IEventListener {
- private array $cache = [];
- private ICache $memCache;
- private IUserManager $userManager;
- public function __construct(ICacheFactory $cacheFactory, IUserManager $userManager) {
- $this->memCache = $cacheFactory->createDistributed('displayNameMappingCache');
- $this->userManager = $userManager;
- }
- public function getDisplayName(string $userId): ?string {
- if (isset($this->cache[$userId])) {
- return $this->cache[$userId];
- }
- $displayName = $this->memCache->get($userId);
- if ($displayName) {
- $this->cache[$userId] = $displayName;
- return $displayName;
- }
- $user = $this->userManager->get($userId);
- if ($user) {
- $displayName = $user->getDisplayName();
- } else {
- $displayName = null;
- }
- $this->cache[$userId] = $displayName;
- $this->memCache->set($userId, $displayName, 60 * 10);
- return $displayName;
- }
- public function clear(): void {
- $this->cache = [];
- $this->memCache->clear();
- }
- public function handle(Event $event): void {
- if ($event instanceof UserChangedEvent && $event->getFeature() === 'displayName') {
- $userId = $event->getUser()->getUID();
- $newDisplayName = $event->getValue();
- $this->cache[$userId] = $newDisplayName;
- $this->memCache->set($userId, $newDisplayName, 60 * 10);
- }
- if ($event instanceof UserDeletedEvent) {
- $userId = $event->getUser()->getUID();
- unset($this->cache[$userId]);
- $this->memCache->remove($userId);
- }
- }
- }
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