mediawiki-extensions-Echo/includes/jobs/NotificationDeleteJob.php

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<?php
/**
* This job is created when sending notifications to the target users. The purpose
* of this job is to delete older notifications when the number of notifications a
* user has is more than $wgEchoMaxUpdateCount, it does not make sense to have tons
* of notifications in the history while users wouldn't bother to click 'load more'
* like 100 times to see them. What we gain from this is we could run expensive
* queries otherwise that would requires adding index and data denormalization.
*
* The initial job contains multiple users, which will in turn have individual jobs
* queued for them.
*/
class EchoNotificationDeleteJob extends Job {
/**
* UserIds to be processed
* @var int[]
*/
protected $userIds = array();
/**
* @param Title $title
* @param array $params
*/
public function __construct( $title, $params ) {
parent::__construct( __CLASS__, $title, $params );
$this->userIds = $params['userIds'];
}
/**
* Run the job of finding & deleting older notifications
*/
public function run() {
global $wgEchoMaxUpdateCount;
if ( count( $this->userIds ) > 1 ) {
// If there are multiple users, queue a single job for each one
$jobs = array();
foreach ( $this->userIds as $userId ) {
$jobs[] = new EchoNotificationDeleteJob( $this->title, array( 'userIds' => array( $userId ) ) );
}
JobQueueGroup::singleton()->push( $jobs );
return true;
}
$notifMapper = new EchoNotificationMapper();
$targetMapper = new EchoTargetPageMapper();
// Back-compat for older jobs which used array( $userId => $userId );
$userIds = array_values( $this->userIds );
$userId = $userIds[0];
$user = User::newFromId( $userId );
$notif = $notifMapper->fetchByUserOffset( $user, $wgEchoMaxUpdateCount );
if ( $notif ) {
$res = $notifMapper->deleteByUserEventOffset(
$user, $notif->getEvent()->getId()
);
if ( $res ) {
$res = $targetMapper->deleteByUserEventOffset(
$user, $notif->getEvent()->getId()
);
}
if ( $res ) {
$notifUser = MWEchoNotifUser::newFromUser( $user );
$notifUser->resetNotificationCount( DB_MASTER );
}
}
return true;
}
}