mediawiki-extensions-Echo/controller/NotificationController.php

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<?php
class EchoNotificationController {
/**
* Retrieves number of unread notifications that a user has.
*
* @param $user User object to check notifications for
* @param $cached Set to false to bypass the cache.
* @return Integer: Number of unread notifications.
*/
public static function getNotificationCount( $user, $cached = true ) {
global $wgMemc;
$memcKey = wfMemcKey( 'echo-notification-count', $user->getId() );
if ( $cached && $wgMemc->get( $memcKey ) !== false ) {
return $wgMemc->get( $memcKey );
}
$dbr = wfGetDB( DB_SLAVE );
$count = $dbr->selectField( 'echo_notification', 'count(*)',
array(
'notification_user' => $user->getId(),
'notification_read_timestamp' => null,
),
__METHOD__
);
$wgMemc->set( $memcKey, $count, 86400 );
return $count;
}
/**
* Mark one or more notifications read for a user.
*
* @param $user User object to mark items read for.
* @param $eventIDs Array of event IDs to mark read
*/
public static function markRead( $user, $eventIDs ) {
$dbw = wfGetDB( DB_MASTER );
$eventIDs = array_filter( (array)$eventIDs, 'is_numeric' );
$dbw->update( 'echo_notification',
array( 'notification_read_timestamp' => $dbw->timestamp( wfTimestampNow() ) ),
array(
'notification_user' => $user->getId(),
'notification_event' => $eventIDs,
),
__METHOD__
);
self::resetNotificationCount( $user );
}
/**
* Recalculates the number of notifications that a user has.
*
* @param $user User object
*/
public static function resetNotificationCount( $user ) {
self::getNotificationCount( $user, false );
$user->invalidateCache();
}
/**
* Processes notifications for a newly-created EchoEvent
*
* @param $event EchoEvent to do notifications for
* @param $defer Defer to job queue
*/
public static function notify( $event, $defer = true ) {
if ( $defer ) {
$title = $event->getTitle() ? $event->getTitle() : Title::newMainPage();
$job = new EchoNotificationJob( $title, array( 'event' => $event ) );
$job->insert();
return;
}
$subscriptions = self::getSubscriptionsForEvent( $event );
foreach ( $subscriptions as $subscription ) {
$user = $subscription->getUser();
$notifyTypes = $subscription->getNotificationTypes();
$notifyTypes = array_keys( array_filter( $notifyTypes ) );
wfRunHooks( 'EchoGetNotificationTypes', array( $subscription, $event, &$notifyTypes ) );
foreach ( $notifyTypes as $type ) {
self::doNotification( $event, $user, $type );
}
}
}
/**
* Processes a single notification for an EchoEvent
*
* @param $event The EchoEvent to do a notification for.
* @param $user The User object to notify.
* @param $type The type of notification to process, as a string.
* @throws MWException
*/
public static function doNotification( $event, $user, $type ) {
global $wgEchoNotifiers;
if ( !isset( $wgEchoNotifiers[$type] ) ) {
throw new MWException( "Invalid notification type $type" );
}
call_user_func_array( $wgEchoNotifiers[$type], array( $user, $event ) );
}
/**
* Retrieves an array of EchoSubscription objects applicable to an EchoEvent.
*
* @param $event EchoEvent to retrieve EchoSubscriptions for.
* @return Array of EchoSubscription objects.
*/
protected static function getSubscriptionsForEvent( $event ) {
$dbr = wfGetDB( DB_SLAVE );
$conds = array( 'sub_event_type' => $event->getType() );
if ( $event->getTitle() ) {
$conds['sub_page_namespace'] = $event->getTitle()->getNamespace();
$conds['sub_page_title'] = $event->getTitle()->getDBkey();
}
$res = $dbr->select( 'echo_subscription', '*', $conds, __METHOD__,
array( 'order by' => 'sub_user asc' ) );
$subscriptions = array();
$rowCollection = array();
$lastUser = null;
foreach ( $res as $row ) {
if ( $lastUser && $row->sub_user != $lastUser ) {
$subscriptions[$lastUser] = EchoSubscription::newFromRows( $rowCollection );
$rowCollection = array();
}
$rowCollection[] = $row;
$lastUser = $row->sub_user;
}
if ( count( $rowCollection ) ) {
$subscriptions[$lastUser] = EchoSubscription::newFromRows( $rowCollection );
}
$users = array();
wfRunHooks( 'EchoGetDefaultNotifiedUsers', array( $event, &$users ) );
foreach ( $users as $u ) {
if ( !isset( $subscriptions[$u->getId()] ) ) {
$subscriptions[$u->getId()] = new EchoSubscription( $u, $event->getType(), $event->getTitle() );
}
}
// Don't notify the person who made the edit, that's a bit silly.
if ( $event->getAgent() ) {
unset( $subscriptions[$event->getAgent()->getId()] );
}
return $subscriptions;
}
/**
* Formats a notification
*
* @param $event EchoEvent that the notification is for.
* @param $user The User to format the notification for.
* @param $format The format to show the notification in: text or html
* @param $type The type of notification being distributed (e.g. email, notify)
* @return type description
*/
public static function formatNotification( $event, $user, $format = 'text', $type = 'notify' ) {
global $wgEchoNotificationFormatters;
$eventType = $event->getType();
if ( isset( $wgEchoNotificationFormatters[$eventType] ) ) {
$params = $wgEchoNotificationFormatters[$eventType];
$notifier = EchoNotificationFormatter::factory( $params );
$notifier->setOutputFormat( $format );
return $notifier->format( $event, $user, $type );
}
return Xml::tags( 'span', array( 'class' => 'error' ),
wfMessage( 'echo-error-no-formatter', $event->getType() )->escaped() );
}
}