mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Echo
synced 2024-12-18 19:01:28 +00:00
462 lines
14 KiB
PHP
462 lines
14 KiB
PHP
<?php
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use MediaWiki\Logger\LoggerFactory;
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/**
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* This class represents the controller for notifications
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*/
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class EchoNotificationController {
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/**
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* Echo event agent per wiki blacklist
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*
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* @var string[]
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*/
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static protected $blacklist;
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/**
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* Echo event agent per user whitelist, this overwrites $blacklist
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*
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* @param string[]
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*/
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static protected $userWhitelist;
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/**
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* Returns the count passed in, or MWEchoNotifUser::MAX_BADGE_COUNT + 1,
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* whichever is less.
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*
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* @param int $count
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* @return int Notification count, with ceiling applied
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*/
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public static function getCappedNotificationCount( $count ) {
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if ( $count <= MWEchoNotifUser::MAX_BADGE_COUNT ) {
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return $count;
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} else {
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return MWEchoNotifUser::MAX_BADGE_COUNT + 1;
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}
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}
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/**
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* Format the notification count as a string. This should only be used for an
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* isolated string count, e.g. as displayed in personal tools or returned by the API.
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*
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* If using it in sentence context, pass the value from getCappedNotificationCount
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* into a message and use PLURAL. Example: notification-bundle-header-page-linked
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*
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* @param int count Notification count
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* @return string Formatted count, after applying cap then formatting to string
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*/
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public static function formatNotificationCount( $count ) {
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$cappedCount = self::getCappedNotificationCount( $count );
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return wfMessage( 'echo-badge-count' )->numParams( $cappedCount )->text();
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}
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/**
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* Processes notifications for a newly-created EchoEvent
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*
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* @param EchoEvent $event
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* @param boolean $defer Defer to job queue or not
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*/
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public static function notify( $event, $defer = true ) {
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// Defer to job queue if defer to job queue is requested and
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// this event should use job queue
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if ( $defer && $event->getUseJobQueue() ) {
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// defer job insertion till end of request when all primary db transactions
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// have been committed
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DeferredUpdates::addCallableUpdate( function () use ( $event ) {
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// can't use self::, php 5.3 doesn't inherit class scope
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EchoNotificationController::enqueueEvent( $event );
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} );
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return;
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}
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// Check if the event object has valid event type. Events with invalid
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// event types left in the job queue should not be processed
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if ( !$event->isEnabledEvent() ) {
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return;
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}
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$type = $event->getType();
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$notifyTypes = self::getEventNotifyTypes( $type );
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$userIds = array();
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$userIdsCount = 0;
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foreach ( self::getUsersToNotifyForEvent( $event ) as $user ) {
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$userIds[$user->getId()] = $user->getId();
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$userNotifyTypes = $notifyTypes;
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// Respect the enotifminoredits preference
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// @todo should this be checked somewhere else?
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if ( !$user->getOption( 'enotifminoredits' ) ) {
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$extra = $event->getExtra();
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if ( !empty( $extra['revid'] ) ) {
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$rev = Revision::newFromID( $extra['revid'], Revision::READ_LATEST );
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if ( $rev->isMinor() ) {
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$notifyTypes = array_diff( $notifyTypes, array( 'email' ) );
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}
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}
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}
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Hooks::run( 'EchoGetNotificationTypes', array( $user, $event, &$userNotifyTypes ) );
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// types such as web, email, etc
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foreach ( $userNotifyTypes as $type ) {
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self::doNotification( $event, $user, $type );
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}
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$userIdsCount++;
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// Process 1000 users per NotificationDeleteJob
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if ( $userIdsCount > 1000 ) {
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self::enqueueDeleteJob( $userIds, $event );
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$userIds = array();
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$userIdsCount = 0;
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}
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}
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// process the userIds left in the array
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if ( $userIds ) {
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self::enqueueDeleteJob( $userIds, $event );
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}
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}
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/**
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* Schedule a job to check and delete older notifications
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*
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* @param int $userIds
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* @param EchoEvent $event
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*/
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public static function enqueueDeleteJob( array $userIds, EchoEvent $event ) {
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// Do nothing if there is no user
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if ( !$userIds ) {
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return;
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}
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$job = new EchoNotificationDeleteJob(
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$event->getTitle() ?: Title::newMainPage(),
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array(
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'userIds' => $userIds
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)
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);
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JobQueueGroup::singleton()->push( $job );
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}
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/**
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* Get the notify types for this event, eg, web/email
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*
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* @param string $eventType Event type
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* @return string[] List of notify types that apply for
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* this event type
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*/
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public static function getEventNotifyTypes( $eventType ) {
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global $wgDefaultNotifyTypeAvailability,
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$wgEchoNotifications;
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$attributeManager = EchoAttributeManager::newFromGlobalVars();
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$category = $attributeManager->getNotificationCategory( $eventType );
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// If the category is displayed in preferences, we should go by that, rather
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// than overrides that are inconsistent with what the user saw in preferences.
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$isTypeSpecificConsidered = !$attributeManager->isCategoryDisplayedInPreferences(
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$category
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);
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$notifyTypes = $wgDefaultNotifyTypeAvailability;
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if ( $isTypeSpecificConsidered && isset( $wgEchoNotifications[$eventType]['notify-type-availability'] ) ) {
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$notifyTypes = array_merge(
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$notifyTypes,
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$wgEchoNotifications[$eventType]['notify-type-availability']
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);
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}
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// Category settings for availability are considered in EchoNotifier
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return array_keys( array_filter( $notifyTypes ) );
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}
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/**
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* Push $event onto the mediawiki job queue
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*
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* @param EchoEvent $event
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*/
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public static function enqueueEvent( EchoEvent $event ) {
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$job = new EchoNotificationJob(
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$event->getTitle() ?: Title::newMainPage(),
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array(
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'event' => $event,
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'masterPos' => MWEchoDbFactory::newFromDefault()
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->getMasterPosition(),
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)
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);
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JobQueueGroup::singleton()->push( $job );
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}
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/**
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* Implements blacklist per active wiki expected to be initialized
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* from InitializeSettings.php
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*
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* @param EchoEvent $event The event to test for exclusion via global blacklist
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* @return boolean True when the event agent is in the global blacklist
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*/
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protected static function isBlacklisted( EchoEvent $event ) {
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if ( !$event->getAgent() ) {
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return false;
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}
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if ( self::$blacklist === null ) {
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global $wgEchoAgentBlacklist, $wgEchoOnWikiBlacklist;
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self::$blacklist = new EchoContainmentSet;
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self::$blacklist->addArray( $wgEchoAgentBlacklist );
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if ( $wgEchoOnWikiBlacklist !== null ) {
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self::$blacklist->addOnWiki(
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NS_MEDIAWIKI,
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$wgEchoOnWikiBlacklist,
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ObjectCache::getLocalClusterInstance(),
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wfMemcKey( "echo_on_wiki_blacklist" )
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);
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}
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}
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return self::$blacklist->contains( $event->getAgent()->getName() );
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}
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/**
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* Implements per-user whitelist sourced from a user wiki page
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*
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* @param EchoEvent $event The event to test for inclusion in whitelist
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* @param User $user The user that owns the whitelist
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* @return boolean True when the event agent is in the user whitelist
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*/
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public static function isWhitelistedByUser( EchoEvent $event, User $user ) {
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global $wgEchoPerUserWhitelistFormat;
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if ( $wgEchoPerUserWhitelistFormat === null || !$event->getAgent() ) {
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return false;
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}
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$userId = $user->getID();
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if ( $userId === 0 ) {
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return false; // anonymous user
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}
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if ( !isset( self::$userWhitelist[$userId] ) ) {
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self::$userWhitelist[$userId] = new EchoContainmentSet;
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self::$userWhitelist[$userId]->addOnWiki(
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NS_USER,
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sprintf( $wgEchoPerUserWhitelistFormat, $user->getName() ),
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ObjectCache::getLocalClusterInstance(),
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wfMemcKey( "echo_on_wiki_whitelist_" . $userId )
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);
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}
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return self::$userWhitelist[$userId]
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->contains( $event->getAgent()->getName() );
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}
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/**
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* Processes a single notification for an EchoEvent
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*
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* @param EchoEvent $event
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* @param User $user The user to be notified.
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* @param string $type The type of notification delivery to process, e.g. 'email'.
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* @throws MWException
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*/
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public static function doNotification( $event, $user, $type ) {
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global $wgEchoNotifiers;
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if ( !isset( $wgEchoNotifiers[$type] ) ) {
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throw new MWException( "Invalid notification type $type" );
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}
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// Don't send any notifications to anonymous users
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if ( $user->isAnon() ) {
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throw new MWException( "Cannot notify anonymous user: {$user->getName()}" );
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}
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call_user_func_array( $wgEchoNotifiers[$type], array( $user, $event ) );
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}
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/**
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* Returns an array each element of which is the result of a
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* user-locator|user-filters attached to the event type.
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*
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* @param EchoEvent $event
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* @param string $locator Either EchoAttributeManager::ATTR_LOCATORS or EchoAttributeManager::ATTR_FILTERS
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* @return array
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*/
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public static function evaluateUserCallable( EchoEvent $event, $locator = EchoAttributeManager::ATTR_LOCATORS ) {
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$attributeManager = EchoAttributeManager::newFromGlobalVars();
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$type = $event->getType();
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$result = array();
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foreach ( $attributeManager->getUserCallable( $type, $locator ) as $callable ) {
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// locator options can be set per-event by using an array with
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// name as first parameter.
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if ( is_array( $callable ) ) {
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$options = $callable;
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$spliced = array_splice( $options, 0, 1, array( $event ) );
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$callable = reset( $spliced );
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} else {
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$options = array( $event );
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}
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if ( is_callable( $callable ) ) {
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$result[] = call_user_func_array( $callable, $options );
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} else {
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wfDebugLog( __CLASS__, __FUNCTION__ . ": Invalid $locator returned for $type" );
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}
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}
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return $result;
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}
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/**
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* Retrieves an array of User objects to be notified for an EchoEvent.
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*
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* @param EchoEvent $event
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* @return Iterator values are User objects
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*/
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public static function getUsersToNotifyForEvent( EchoEvent $event ) {
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$notify = new EchoFilteredSequentialIterator;
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foreach ( self::evaluateUserCallable( $event, EchoAttributeManager::ATTR_LOCATORS ) as $users ) {
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$notify->add( $users );
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}
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// Hook for injecting more users.
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// @deprecated
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$users = array();
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Hooks::run( 'EchoGetDefaultNotifiedUsers', array( $event, &$users ) );
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if ( $users ) {
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$notify->add( $users );
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}
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// Exclude certain users
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foreach ( self::evaluateUserCallable( $event, EchoAttributeManager::ATTR_FILTERS ) as $users ) {
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// the result of the callback can be both an iterator or array
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$users = is_array( $users ) ? $users : iterator_to_array( $users );
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$notify->addFilter( function ( User $user ) use ( $users ) {
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// we need to check if $user is in $users, but they're not
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// guaranteed to be the same object, so I'll compare ids.
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$userId = $user->getId();
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$userIds = array_map( function ( User $user ) {
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return $user->getId();
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}, $users );
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return !in_array( $userId, $userIds );
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} );
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}
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// Filter non-User, anon and duplicate users
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$seen = array();
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$notify->addFilter( function ( $user ) use ( &$seen ) {
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if ( !$user instanceof User ) {
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wfDebugLog( __METHOD__, 'Expected all User instances, received:' .
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( is_object( $user ) ? get_class( $user ) : gettype( $user ) )
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);
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return false;
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}
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if ( $user->isAnon() || isset( $seen[$user->getId()] ) ) {
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return false;
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}
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$seen[$user->getId()] = true;
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return true;
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} );
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// Don't notify the person who initiated the event unless the event extra says to do so
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$extra = $event->getExtra();
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if ( ( !isset( $extra['notifyAgent'] ) || !$extra['notifyAgent'] ) && $event->getAgent() ) {
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$agentId = $event->getAgent()->getId();
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$notify->addFilter( function ( $user ) use ( $agentId ) {
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return $user->getId() != $agentId;
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} );
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}
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// Apply per-wiki event blacklist and per-user whitelists
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// of that blacklist.
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if ( self::isBlacklisted( $event ) ) {
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$notify->addFilter( function ( $user ) use ( $event ) {
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// don't use self:: - PHP5.3 closures don't inherit class scope
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return EchoNotificationController::isWhitelistedByUser( $event, $user );
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} );
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}
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return $notify->getIterator();
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}
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/**
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* Formats a notification
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*
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* @param EchoEvent $event The event for a notification.
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* @param User $user The user to format the notification for.
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* @param string $format The format to show the notification in: text, html, or email
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* @param string $type The type of notification being distributed (e.g. email, web)
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* @return string|array The formatted notification, or an array of subject
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* and body (for emails), or an error message
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*/
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public static function formatNotification( EchoEvent $event, User $user, $format = 'text', $type = 'web' ) {
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$eventType = $event->getType();
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$res = '';
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try {
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$formatter = EchoNotificationFormatter::factory( $eventType );
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$formatter->setOutputFormat( $format );
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} catch ( InvalidArgumentException $e ) {
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self::failFormatting( $event, $user );
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return '';
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}
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set_error_handler( array( __CLASS__, 'formatterErrorHandler' ), -1 );
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try {
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$res = $formatter->format( $event, $user, $type );
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} catch ( Exception $e ) {
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$context = array(
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'id' => $event->getId(),
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'eventType' => $eventType,
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'format' => $format,
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'type' => $type,
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'user' => $user ? $user->getName() : 'no user',
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'exceptionName' => get_class( $e ),
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'exceptionMessage' => $e->getMessage(),
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);
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LoggerFactory::getInstance( 'Echo' )->error( 'Error formatting notification', $context );
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MWExceptionHandler::logException( $e );
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}
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restore_error_handler();
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if ( $res === '' ) {
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self::failFormatting( $event, $user );
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}
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return $res;
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}
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/**
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* Event has failed to format for the given user. Mark it as read so
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* we do not continue to notify them about this broken event.
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*
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* @param EchoEvent $event
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* @param User $user
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*/
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protected static function failFormatting( EchoEvent $event, $user ) {
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// FIXME: The only issue is that the badge count won't be up to date
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// till you refresh the page. Probably we could do this in the browser
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// so that if the formatting is empty and the notif is unread, put it
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// in the auto-mark-read APIs
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EchoDeferredMarkAsReadUpdate::add( $event, $user );
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}
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/**
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* INTERNAL. Must be public to be callable by the php error handling methods.
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*
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* Converts E_RECOVERABLE_ERROR, such as passing null to a method expecting
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* a non-null object, into exceptions.
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*/
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public static function formatterErrorHandler( $errno, $errstr, $errfile, $errline ) {
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if ( $errno !== E_RECOVERABLE_ERROR ) {
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return false;
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}
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throw new EchoCatchableFatalErrorException( $errno, $errstr, $errfile, $errline );
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}
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}
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