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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Joas Schilling <coding@schilljs.com>
*
* @license AGPL-3.0
*
* 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 OCA\Comments\Notification;
use OCP\Comments\CommentsEvent;
use OCP\Comments\IComment;
use OCP\IUserManager;
use OCP\Notification\IManager;
class Listener {
/** @var IManager */
protected $notificationManager;
/** @var IUserManager */
protected $userManager;
/**
* Listener constructor.
*
* @param IManager $notificationManager
* @param IUserManager $userManager
*/
public function __construct(
IManager $notificationManager,
IUserManager $userManager
) {
$this->notificationManager = $notificationManager;
$this->userManager = $userManager;
}
/**
* @param CommentsEvent $event
*/
public function evaluate(CommentsEvent $event) {
$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
*
* @param IComment $comment
* @return \OCP\Notification\INotification
*/
public function instantiateNotification(IComment $comment) {
$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 string[] containing the mentions, e.g. ['alice', 'bob']
*/
public function extractMentions(array $mentions) {
if(empty($mentions)) {
return [];
}
$uids = [];
foreach($mentions as $mention) {
if($mention['type'] === 'user') {
$uids[] = $mention['id'];
}
}
return $uids;
}
}