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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\Comments\Notification;
use OCP\Comments\CommentsEvent;
use OCP\Comments\IComment;
use OCP\IUserManager;
use OCP\Notification\IManager;
use OCP\Notification\INotification;
class Listener {
public function __construct(
protected IManager $notificationManager,
protected IUserManager $userManager,
) {
}
public function evaluate(CommentsEvent $event): void {
$comment = $event->getComment();
$mentions = $this->extractMentions($comment->getMentions());
if (empty($mentions)) {
// no one to notify
return;
}
$notification = $this->instantiateNotification($comment);
foreach ($mentions as $uid) {
if (($comment->getActorType() === 'users' && $uid === $comment->getActorId())
|| !$this->userManager->userExists($uid)
) {
// do not notify unknown users or yourself
continue;
}
$notification->setUser($uid);
if ($event->getEvent() === CommentsEvent::EVENT_DELETE
|| $event->getEvent() === CommentsEvent::EVENT_PRE_UPDATE) {
$this->notificationManager->markProcessed($notification);
} else {
$this->notificationManager->notify($notification);
}
}
}
/**
* Creates a notification instance and fills it with comment data
*/
public function instantiateNotification(IComment $comment): INotification {
$notification = $this->notificationManager->createNotification();
$notification
->setApp('comments')
->setObject('comment', $comment->getId())
->setSubject('mention', [ $comment->getObjectType(), $comment->getObjectId() ])
->setDateTime($comment->getCreationDateTime());
return $notification;
}
/**
* Flattens the mention array returned from comments to a list of user ids.
*
* @param array $mentions
* @return list<string> containing the mentions, e.g. ['alice', 'bob']
*/
public function extractMentions(array $mentions): array {
if (empty($mentions)) {
return [];
}
$uids = [];
foreach ($mentions as $mention) {
if ($mention['type'] === 'user') {
$uids[] = $mention['id'];
}
}
return $uids;
}
}
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