3 use Wikimedia\Rdbms\IDatabase
;
4 use Liuggio\StatsdClient\Factory\StatsdDataFactoryInterface
;
5 use MediaWiki\Linker\LinkTarget
;
6 use Wikimedia\Assert\Assert
;
7 use Wikimedia\ScopedCallback
;
8 use Wikimedia\Rdbms\ILBFactory
;
9 use Wikimedia\Rdbms\LoadBalancer
;
12 * Storage layer class for WatchedItems.
13 * Database interaction & caching
14 * TODO caching should be factored out into a CachingWatchedItemStore class
19 class WatchedItemStore
implements WatchedItemStoreInterface
, StatsdAwareInterface
{
29 private $loadBalancer;
34 private $readOnlyMode;
42 * @var array[] Looks like $cacheIndex[Namespace ID][Target DB Key][User Id] => 'key'
43 * The index is needed so that on mass changes all relevant items can be un-cached.
44 * For example: Clearing a users watchlist of all items or updating notification timestamps
45 * for all users watching a single target.
47 private $cacheIndex = [];
52 private $deferredUpdatesAddCallableUpdateCallback;
57 private $revisionGetTimestampFromIdCallback;
62 private $updateRowsPerQuery;
65 * @var StatsdDataFactoryInterface
70 * @param ILBFactory $lbFactory
71 * @param HashBagOStuff $cache
72 * @param ReadOnlyMode $readOnlyMode
73 * @param int $updateRowsPerQuery
75 public function __construct(
76 ILBFactory
$lbFactory,
78 ReadOnlyMode
$readOnlyMode,
81 $this->lbFactory
= $lbFactory;
82 $this->loadBalancer
= $lbFactory->getMainLB();
83 $this->cache
= $cache;
84 $this->readOnlyMode
= $readOnlyMode;
85 $this->stats
= new NullStatsdDataFactory();
86 $this->deferredUpdatesAddCallableUpdateCallback
=
87 [ DeferredUpdates
::class, 'addCallableUpdate' ];
88 $this->revisionGetTimestampFromIdCallback
=
89 [ Revision
::class, 'getTimestampFromId' ];
90 $this->updateRowsPerQuery
= $updateRowsPerQuery;
94 * @param StatsdDataFactoryInterface $stats
96 public function setStatsdDataFactory( StatsdDataFactoryInterface
$stats ) {
97 $this->stats
= $stats;
101 * Overrides the DeferredUpdates::addCallableUpdate callback
102 * This is intended for use while testing and will fail if MW_PHPUNIT_TEST is not defined.
104 * @param callable $callback
106 * @see DeferredUpdates::addCallableUpdate for callback signiture
108 * @return ScopedCallback to reset the overridden value
109 * @throws MWException
111 public function overrideDeferredUpdatesAddCallableUpdateCallback( callable
$callback ) {
112 if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
113 throw new MWException(
114 'Cannot override DeferredUpdates::addCallableUpdate callback in operation.'
117 $previousValue = $this->deferredUpdatesAddCallableUpdateCallback
;
118 $this->deferredUpdatesAddCallableUpdateCallback
= $callback;
119 return new ScopedCallback( function () use ( $previousValue ) {
120 $this->deferredUpdatesAddCallableUpdateCallback
= $previousValue;
125 * Overrides the Revision::getTimestampFromId callback
126 * This is intended for use while testing and will fail if MW_PHPUNIT_TEST is not defined.
128 * @param callable $callback
129 * @see Revision::getTimestampFromId for callback signiture
131 * @return ScopedCallback to reset the overridden value
132 * @throws MWException
134 public function overrideRevisionGetTimestampFromIdCallback( callable
$callback ) {
135 if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
136 throw new MWException(
137 'Cannot override Revision::getTimestampFromId callback in operation.'
140 $previousValue = $this->revisionGetTimestampFromIdCallback
;
141 $this->revisionGetTimestampFromIdCallback
= $callback;
142 return new ScopedCallback( function () use ( $previousValue ) {
143 $this->revisionGetTimestampFromIdCallback
= $previousValue;
147 private function getCacheKey( User
$user, LinkTarget
$target ) {
148 return $this->cache
->makeKey(
149 (string)$target->getNamespace(),
151 (string)$user->getId()
155 private function cache( WatchedItem
$item ) {
156 $user = $item->getUser();
157 $target = $item->getLinkTarget();
158 $key = $this->getCacheKey( $user, $target );
159 $this->cache
->set( $key, $item );
160 $this->cacheIndex
[$target->getNamespace()][$target->getDBkey()][$user->getId()] = $key;
161 $this->stats
->increment( 'WatchedItemStore.cache' );
164 private function uncache( User
$user, LinkTarget
$target ) {
165 $this->cache
->delete( $this->getCacheKey( $user, $target ) );
166 unset( $this->cacheIndex
[$target->getNamespace()][$target->getDBkey()][$user->getId()] );
167 $this->stats
->increment( 'WatchedItemStore.uncache' );
170 private function uncacheLinkTarget( LinkTarget
$target ) {
171 $this->stats
->increment( 'WatchedItemStore.uncacheLinkTarget' );
172 if ( !isset( $this->cacheIndex
[$target->getNamespace()][$target->getDBkey()] ) ) {
175 foreach ( $this->cacheIndex
[$target->getNamespace()][$target->getDBkey()] as $key ) {
176 $this->stats
->increment( 'WatchedItemStore.uncacheLinkTarget.items' );
177 $this->cache
->delete( $key );
181 private function uncacheUser( User
$user ) {
182 $this->stats
->increment( 'WatchedItemStore.uncacheUser' );
183 foreach ( $this->cacheIndex
as $ns => $dbKeyArray ) {
184 foreach ( $dbKeyArray as $dbKey => $userArray ) {
185 if ( isset( $userArray[$user->getId()] ) ) {
186 $this->stats
->increment( 'WatchedItemStore.uncacheUser.items' );
187 $this->cache
->delete( $userArray[$user->getId()] );
195 * @param LinkTarget $target
197 * @return WatchedItem|false
199 private function getCached( User
$user, LinkTarget
$target ) {
200 return $this->cache
->get( $this->getCacheKey( $user, $target ) );
204 * Return an array of conditions to select or update the appropriate database
208 * @param LinkTarget $target
212 private function dbCond( User
$user, LinkTarget
$target ) {
214 'wl_user' => $user->getId(),
215 'wl_namespace' => $target->getNamespace(),
216 'wl_title' => $target->getDBkey(),
221 * @param int $dbIndex DB_MASTER or DB_REPLICA
224 * @throws MWException
226 private function getConnectionRef( $dbIndex ) {
227 return $this->loadBalancer
->getConnectionRef( $dbIndex, [ 'watchlist' ] );
231 * Deletes ALL watched items for the given user when under
232 * $updateRowsPerQuery entries exist.
238 * @return bool true on success, false when too many items are watched
240 public function clearUserWatchedItems( User
$user ) {
241 if ( $this->countWatchedItems( $user ) > $this->updateRowsPerQuery
) {
245 $dbw = $this->loadBalancer
->getConnectionRef( DB_MASTER
);
248 [ 'wl_user' => $user->getId() ],
251 $this->uncacheAllItemsForUser( $user );
256 private function uncacheAllItemsForUser( User
$user ) {
257 $userId = $user->getId();
258 foreach ( $this->cacheIndex
as $ns => $dbKeyIndex ) {
259 foreach ( $dbKeyIndex as $dbKey => $userIndex ) {
260 if ( array_key_exists( $userId, $userIndex ) ) {
261 $this->cache
->delete( $userIndex[$userId] );
262 unset( $this->cacheIndex
[$ns][$dbKey][$userId] );
267 // Cleanup empty cache keys
268 foreach ( $this->cacheIndex
as $ns => $dbKeyIndex ) {
269 foreach ( $dbKeyIndex as $dbKey => $userIndex ) {
270 if ( empty( $this->cacheIndex
[$ns][$dbKey] ) ) {
271 unset( $this->cacheIndex
[$ns][$dbKey] );
274 if ( empty( $this->cacheIndex
[$ns] ) ) {
275 unset( $this->cacheIndex
[$ns] );
281 * Queues a job that will clear the users watchlist using the Job Queue.
287 public function clearUserWatchedItemsUsingJobQueue( User
$user ) {
288 $job = ClearUserWatchlistJob
::newForUser( $user, $this->getMaxId() );
290 JobQueueGroup
::singleton()->push( $job );
295 * @return int The maximum current wl_id
297 public function getMaxId() {
298 $dbr = $this->getConnectionRef( DB_REPLICA
);
299 return (int)$dbr->selectField(
312 public function countWatchedItems( User
$user ) {
313 $dbr = $this->getConnectionRef( DB_REPLICA
);
314 $return = (int)$dbr->selectField(
318 'wl_user' => $user->getId()
328 * @param LinkTarget $target
331 public function countWatchers( LinkTarget
$target ) {
332 $dbr = $this->getConnectionRef( DB_REPLICA
);
333 $return = (int)$dbr->selectField(
337 'wl_namespace' => $target->getNamespace(),
338 'wl_title' => $target->getDBkey(),
348 * @param LinkTarget $target
349 * @param string|int $threshold
352 public function countVisitingWatchers( LinkTarget
$target, $threshold ) {
353 $dbr = $this->getConnectionRef( DB_REPLICA
);
354 $visitingWatchers = (int)$dbr->selectField(
358 'wl_namespace' => $target->getNamespace(),
359 'wl_title' => $target->getDBkey(),
360 'wl_notificationtimestamp >= ' .
361 $dbr->addQuotes( $dbr->timestamp( $threshold ) ) .
362 ' OR wl_notificationtimestamp IS NULL'
367 return $visitingWatchers;
372 * @param LinkTarget[] $targets
373 * @param array $options
376 public function countWatchersMultiple( array $targets, array $options = [] ) {
377 $dbOptions = [ 'GROUP BY' => [ 'wl_namespace', 'wl_title' ] ];
379 $dbr = $this->getConnectionRef( DB_REPLICA
);
381 if ( array_key_exists( 'minimumWatchers', $options ) ) {
382 $dbOptions['HAVING'] = 'COUNT(*) >= ' . (int)$options['minimumWatchers'];
385 $lb = new LinkBatch( $targets );
388 [ 'wl_title', 'wl_namespace', 'watchers' => 'COUNT(*)' ],
389 [ $lb->constructSet( 'wl', $dbr ) ],
395 foreach ( $targets as $linkTarget ) {
396 $watchCounts[$linkTarget->getNamespace()][$linkTarget->getDBkey()] = 0;
399 foreach ( $res as $row ) {
400 $watchCounts[$row->wl_namespace
][$row->wl_title
] = (int)$row->watchers
;
408 * @param array $targetsWithVisitThresholds
409 * @param int|null $minimumWatchers
412 public function countVisitingWatchersMultiple(
413 array $targetsWithVisitThresholds,
414 $minimumWatchers = null
416 if ( $targetsWithVisitThresholds === [] ) {
417 // No titles requested => no results returned
421 $dbr = $this->getConnectionRef( DB_REPLICA
);
423 $conds = $this->getVisitingWatchersCondition( $dbr, $targetsWithVisitThresholds );
425 $dbOptions = [ 'GROUP BY' => [ 'wl_namespace', 'wl_title' ] ];
426 if ( $minimumWatchers !== null ) {
427 $dbOptions['HAVING'] = 'COUNT(*) >= ' . (int)$minimumWatchers;
431 [ 'wl_namespace', 'wl_title', 'watchers' => 'COUNT(*)' ],
438 foreach ( $targetsWithVisitThresholds as list( $target ) ) {
439 /* @var LinkTarget $target */
440 $watcherCounts[$target->getNamespace()][$target->getDBkey()] = 0;
443 foreach ( $res as $row ) {
444 $watcherCounts[$row->wl_namespace
][$row->wl_title
] = (int)$row->watchers
;
447 return $watcherCounts;
451 * Generates condition for the query used in a batch count visiting watchers.
453 * @param IDatabase $db
454 * @param array $targetsWithVisitThresholds array of pairs (LinkTarget, last visit threshold)
457 private function getVisitingWatchersCondition(
459 array $targetsWithVisitThresholds
461 $missingTargets = [];
462 $namespaceConds = [];
463 foreach ( $targetsWithVisitThresholds as list( $target, $threshold ) ) {
464 if ( $threshold === null ) {
465 $missingTargets[] = $target;
468 /* @var LinkTarget $target */
469 $namespaceConds[$target->getNamespace()][] = $db->makeList( [
470 'wl_title = ' . $db->addQuotes( $target->getDBkey() ),
472 'wl_notificationtimestamp >= ' . $db->addQuotes( $db->timestamp( $threshold ) ),
473 'wl_notificationtimestamp IS NULL'
479 foreach ( $namespaceConds as $namespace => $pageConds ) {
480 $conds[] = $db->makeList( [
481 'wl_namespace = ' . $namespace,
482 '(' . $db->makeList( $pageConds, LIST_OR
) . ')'
486 if ( $missingTargets ) {
487 $lb = new LinkBatch( $missingTargets );
488 $conds[] = $lb->constructSet( 'wl', $db );
491 return $db->makeList( $conds, LIST_OR
);
497 * @param LinkTarget $target
500 public function getWatchedItem( User
$user, LinkTarget
$target ) {
501 if ( $user->isAnon() ) {
505 $cached = $this->getCached( $user, $target );
507 $this->stats
->increment( 'WatchedItemStore.getWatchedItem.cached' );
510 $this->stats
->increment( 'WatchedItemStore.getWatchedItem.load' );
511 return $this->loadWatchedItem( $user, $target );
517 * @param LinkTarget $target
518 * @return WatchedItem|bool
520 public function loadWatchedItem( User
$user, LinkTarget
$target ) {
521 // Only loggedin user can have a watchlist
522 if ( $user->isAnon() ) {
526 $dbr = $this->getConnectionRef( DB_REPLICA
);
527 $row = $dbr->selectRow(
529 'wl_notificationtimestamp',
530 $this->dbCond( $user, $target ),
538 $item = new WatchedItem(
541 wfTimestampOrNull( TS_MW
, $row->wl_notificationtimestamp
)
543 $this->cache( $item );
551 * @param array $options
552 * @return WatchedItem[]
554 public function getWatchedItemsForUser( User
$user, array $options = [] ) {
555 $options +
= [ 'forWrite' => false ];
558 if ( array_key_exists( 'sort', $options ) ) {
560 ( in_array( $options['sort'], [ self
::SORT_ASC
, self
::SORT_DESC
] ) ),
561 '$options[\'sort\']',
562 'must be SORT_ASC or SORT_DESC'
564 $dbOptions['ORDER BY'] = [
565 "wl_namespace {$options['sort']}",
566 "wl_title {$options['sort']}"
569 $db = $this->getConnectionRef( $options['forWrite'] ? DB_MASTER
: DB_REPLICA
);
573 [ 'wl_namespace', 'wl_title', 'wl_notificationtimestamp' ],
574 [ 'wl_user' => $user->getId() ],
580 foreach ( $res as $row ) {
581 // @todo: Should we add these to the process cache?
582 $watchedItems[] = new WatchedItem(
584 new TitleValue( (int)$row->wl_namespace
, $row->wl_title
),
585 $row->wl_notificationtimestamp
589 return $watchedItems;
595 * @param LinkTarget $target
598 public function isWatched( User
$user, LinkTarget
$target ) {
599 return (bool)$this->getWatchedItem( $user, $target );
605 * @param LinkTarget[] $targets
608 public function getNotificationTimestampsBatch( User
$user, array $targets ) {
610 foreach ( $targets as $target ) {
611 $timestamps[$target->getNamespace()][$target->getDBkey()] = false;
614 if ( $user->isAnon() ) {
619 foreach ( $targets as $target ) {
620 $cachedItem = $this->getCached( $user, $target );
622 $timestamps[$target->getNamespace()][$target->getDBkey()] =
623 $cachedItem->getNotificationTimestamp();
625 $targetsToLoad[] = $target;
629 if ( !$targetsToLoad ) {
633 $dbr = $this->getConnectionRef( DB_REPLICA
);
635 $lb = new LinkBatch( $targetsToLoad );
638 [ 'wl_namespace', 'wl_title', 'wl_notificationtimestamp' ],
640 $lb->constructSet( 'wl', $dbr ),
641 'wl_user' => $user->getId(),
646 foreach ( $res as $row ) {
647 $timestamps[$row->wl_namespace
][$row->wl_title
] =
648 wfTimestampOrNull( TS_MW
, $row->wl_notificationtimestamp
);
657 * @param LinkTarget $target
659 public function addWatch( User
$user, LinkTarget
$target ) {
660 $this->addWatchBatchForUser( $user, [ $target ] );
666 * @param LinkTarget[] $targets
669 public function addWatchBatchForUser( User
$user, array $targets ) {
670 if ( $this->readOnlyMode
->isReadOnly() ) {
673 // Only loggedin user can have a watchlist
674 if ( $user->isAnon() ) {
684 foreach ( $targets as $target ) {
686 'wl_user' => $user->getId(),
687 'wl_namespace' => $target->getNamespace(),
688 'wl_title' => $target->getDBkey(),
689 'wl_notificationtimestamp' => null,
691 $items[] = new WatchedItem(
696 $this->uncache( $user, $target );
699 $dbw = $this->getConnectionRef( DB_MASTER
);
700 foreach ( array_chunk( $rows, 100 ) as $toInsert ) {
701 // Use INSERT IGNORE to avoid overwriting the notification timestamp
702 // if there's already an entry for this page
703 $dbw->insert( 'watchlist', $toInsert, __METHOD__
, 'IGNORE' );
705 // Update process cache to ensure skin doesn't claim that the current
706 // page is unwatched in the response of action=watch itself (T28292).
707 // This would otherwise be re-queried from a replica by isWatched().
708 foreach ( $items as $item ) {
709 $this->cache( $item );
718 * @param LinkTarget $target
721 public function removeWatch( User
$user, LinkTarget
$target ) {
722 // Only logged in user can have a watchlist
723 if ( $this->readOnlyMode
->isReadOnly() ||
$user->isAnon() ) {
727 $this->uncache( $user, $target );
729 $dbw = $this->getConnectionRef( DB_MASTER
);
730 $dbw->delete( 'watchlist',
732 'wl_user' => $user->getId(),
733 'wl_namespace' => $target->getNamespace(),
734 'wl_title' => $target->getDBkey(),
737 $success = (bool)$dbw->affectedRows();
745 * @param string|int $timestamp
746 * @param LinkTarget[] $targets
749 public function setNotificationTimestampsForUser( User
$user, $timestamp, array $targets = [] ) {
750 // Only loggedin user can have a watchlist
751 if ( $user->isAnon() ) {
755 $dbw = $this->getConnectionRef( DB_MASTER
);
757 $conds = [ 'wl_user' => $user->getId() ];
759 $batch = new LinkBatch( $targets );
760 $conds[] = $batch->constructSet( 'wl', $dbw );
763 if ( $timestamp !== null ) {
764 $timestamp = $dbw->timestamp( $timestamp );
767 $success = $dbw->update(
769 [ 'wl_notificationtimestamp' => $timestamp ],
774 $this->uncacheUser( $user );
779 public function resetAllNotificationTimestampsForUser( User
$user ) {
780 // Only loggedin user can have a watchlist
781 if ( $user->isAnon() ) {
785 // If the page is watched by the user (or may be watched), update the timestamp
786 $job = new ClearWatchlistNotificationsJob(
787 $user->getUserPage(),
788 [ 'userId' => $user->getId(), 'casTime' => time() ]
791 // Try to run this post-send
792 // Calls DeferredUpdates::addCallableUpdate in normal operation
794 $this->deferredUpdatesAddCallableUpdateCallback
,
795 function () use ( $job ) {
803 * @param User $editor
804 * @param LinkTarget $target
805 * @param string|int $timestamp
808 public function updateNotificationTimestamp( User
$editor, LinkTarget
$target, $timestamp ) {
809 $dbw = $this->getConnectionRef( DB_MASTER
);
810 $uids = $dbw->selectFieldValues(
814 'wl_user != ' . intval( $editor->getId() ),
815 'wl_namespace' => $target->getNamespace(),
816 'wl_title' => $target->getDBkey(),
817 'wl_notificationtimestamp IS NULL',
822 $watchers = array_map( 'intval', $uids );
824 // Update wl_notificationtimestamp for all watching users except the editor
826 DeferredUpdates
::addCallableUpdate(
827 function () use ( $timestamp, $watchers, $target, $fname ) {
828 $dbw = $this->getConnectionRef( DB_MASTER
);
829 $ticket = $this->lbFactory
->getEmptyTransactionTicket( $fname );
831 $watchersChunks = array_chunk( $watchers, $this->updateRowsPerQuery
);
832 foreach ( $watchersChunks as $watchersChunk ) {
833 $dbw->update( 'watchlist',
835 'wl_notificationtimestamp' => $dbw->timestamp( $timestamp )
836 ], [ /* WHERE - TODO Use wl_id T130067 */
837 'wl_user' => $watchersChunk,
838 'wl_namespace' => $target->getNamespace(),
839 'wl_title' => $target->getDBkey(),
842 if ( count( $watchersChunks ) > 1 ) {
843 $this->lbFactory
->commitAndWaitForReplication(
844 $fname, $ticket, [ 'domain' => $dbw->getDomainID() ]
848 $this->uncacheLinkTarget( $target );
850 DeferredUpdates
::POSTSEND
,
861 * @param Title $title
862 * @param string $force
866 public function resetNotificationTimestamp( User
$user, Title
$title, $force = '', $oldid = 0 ) {
867 // Only loggedin user can have a watchlist
868 if ( $this->readOnlyMode
->isReadOnly() ||
$user->isAnon() ) {
873 if ( $force != 'force' ) {
874 $item = $this->loadWatchedItem( $user, $title );
875 if ( !$item ||
$item->getNotificationTimestamp() === null ) {
880 // If the page is watched by the user (or may be watched), update the timestamp
881 $job = new ActivityUpdateJob(
884 'type' => 'updateWatchlistNotification',
885 'userid' => $user->getId(),
886 'notifTime' => $this->getNotificationTimestamp( $user, $title, $item, $force, $oldid ),
891 // Try to run this post-send
892 // Calls DeferredUpdates::addCallableUpdate in normal operation
894 $this->deferredUpdatesAddCallableUpdateCallback
,
895 function () use ( $job ) {
900 $this->uncache( $user, $title );
905 private function getNotificationTimestamp( User
$user, Title
$title, $item, $force, $oldid ) {
907 // No oldid given, assuming latest revision; clear the timestamp.
911 if ( !$title->getNextRevisionID( $oldid ) ) {
912 // Oldid given and is the latest revision for this title; clear the timestamp.
916 if ( $item === null ) {
917 $item = $this->loadWatchedItem( $user, $title );
921 // This can only happen if $force is enabled.
925 // Oldid given and isn't the latest; update the timestamp.
926 // This will result in no further notification emails being sent!
927 // Calls Revision::getTimestampFromId in normal operation
928 $notificationTimestamp = call_user_func(
929 $this->revisionGetTimestampFromIdCallback
,
934 // We need to go one second to the future because of various strict comparisons
935 // throughout the codebase
936 $ts = new MWTimestamp( $notificationTimestamp );
937 $ts->timestamp
->add( new DateInterval( 'PT1S' ) );
938 $notificationTimestamp = $ts->getTimestamp( TS_MW
);
940 if ( $notificationTimestamp < $item->getNotificationTimestamp() ) {
941 if ( $force != 'force' ) {
944 // This is a little silly…
945 return $item->getNotificationTimestamp();
949 return $notificationTimestamp;
955 * @param int|null $unreadLimit
958 public function countUnreadNotifications( User
$user, $unreadLimit = null ) {
960 if ( $unreadLimit !== null ) {
961 $unreadLimit = (int)$unreadLimit;
962 $queryOptions['LIMIT'] = $unreadLimit;
965 $dbr = $this->getConnectionRef( DB_REPLICA
);
966 $rowCount = $dbr->selectRowCount(
970 'wl_user' => $user->getId(),
971 'wl_notificationtimestamp IS NOT NULL',
977 if ( !isset( $unreadLimit ) ) {
981 if ( $rowCount >= $unreadLimit ) {
990 * @param LinkTarget $oldTarget
991 * @param LinkTarget $newTarget
993 public function duplicateAllAssociatedEntries( LinkTarget
$oldTarget, LinkTarget
$newTarget ) {
994 $oldTarget = Title
::newFromLinkTarget( $oldTarget );
995 $newTarget = Title
::newFromLinkTarget( $newTarget );
997 $this->duplicateEntry( $oldTarget->getSubjectPage(), $newTarget->getSubjectPage() );
998 $this->duplicateEntry( $oldTarget->getTalkPage(), $newTarget->getTalkPage() );
1003 * @param LinkTarget $oldTarget
1004 * @param LinkTarget $newTarget
1006 public function duplicateEntry( LinkTarget
$oldTarget, LinkTarget
$newTarget ) {
1007 $dbw = $this->getConnectionRef( DB_MASTER
);
1009 $result = $dbw->select(
1011 [ 'wl_user', 'wl_notificationtimestamp' ],
1013 'wl_namespace' => $oldTarget->getNamespace(),
1014 'wl_title' => $oldTarget->getDBkey(),
1020 $newNamespace = $newTarget->getNamespace();
1021 $newDBkey = $newTarget->getDBkey();
1023 # Construct array to replace into the watchlist
1025 foreach ( $result as $row ) {
1027 'wl_user' => $row->wl_user
,
1028 'wl_namespace' => $newNamespace,
1029 'wl_title' => $newDBkey,
1030 'wl_notificationtimestamp' => $row->wl_notificationtimestamp
,
1034 if ( !empty( $values ) ) {
1036 # Note that multi-row replace is very efficient for MySQL but may be inefficient for
1037 # some other DBMSes, mostly due to poor simulation by us
1040 [ [ 'wl_user', 'wl_namespace', 'wl_title' ] ],