blob: 6ee74cc9f6ce837dc26a0813ce9f3aaf2f8d0fd5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
<?php
declare(strict_types=1);
/**
* @copyright Copyright 2022 Carl Schwan <carl@carlschwan.eu>
* @license AGPL-3.0-or-later
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
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 that cache the relation UserId -> Display name
*
* This saves fetching the user from a user backend and later on fetching
* their preferences. It's generally not an issue if this data is slightly
* outdated.
*/
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); // 10 minutes
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, $newDisplayName, 60 * 10); // 10 minutes
}
if ($event instanceof UserDeletedEvent) {
$userId = $event->getUser()->getUID();
unset($this->cache[$userId]);
$this->memCache->remove($userId);
}
}
}
|
