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| 1 | <?php |
| 2 | |
| 3 | use Liuggio\StatsdClient\Factory\StatsdDataFactoryInterface; |
| 4 | use MediaWiki\Cache\LinkBatchFactory; |
| 5 | use MediaWiki\Config\ServiceOptions; |
| 6 | use MediaWiki\Linker\LinkTarget; |
| 7 | use MediaWiki\MainConfigNames; |
| 8 | use MediaWiki\Page\PageIdentity; |
| 9 | use MediaWiki\Revision\RevisionLookup; |
| 10 | use MediaWiki\User\UserIdentity; |
| 11 | use Wikimedia\Assert\Assert; |
| 12 | use Wikimedia\ParamValidator\TypeDef\ExpiryDef; |
| 13 | use Wikimedia\Rdbms\IDatabase; |
| 14 | use Wikimedia\Rdbms\ILBFactory; |
| 15 | use Wikimedia\Rdbms\IResultWrapper; |
| 16 | use Wikimedia\Rdbms\ReadOnlyMode; |
| 17 | use Wikimedia\Rdbms\SelectQueryBuilder; |
| 18 | use Wikimedia\ScopedCallback; |
| 19 | |
| 20 | /** |
| 21 | * Storage layer class for WatchedItems. |
| 22 | * Database interaction & caching |
| 23 | * TODO caching should be factored out into a CachingWatchedItemStore class |
| 24 | * |
| 25 | * @author Addshore |
| 26 | * @since 1.27 |
| 27 | */ |
| 28 | class WatchedItemStore implements WatchedItemStoreInterface, StatsdAwareInterface { |
| 29 | |
| 30 | /** |
| 31 | * @internal For use by ServiceWiring |
| 32 | */ |
| 33 | public const CONSTRUCTOR_OPTIONS = [ |
| 34 | MainConfigNames::UpdateRowsPerQuery, |
| 35 | MainConfigNames::WatchlistExpiry, |
| 36 | MainConfigNames::WatchlistExpiryMaxDuration, |
| 37 | MainConfigNames::WatchlistPurgeRate, |
| 38 | ]; |
| 39 | |
| 40 | /** |
| 41 | * @var ILBFactory |
| 42 | */ |
| 43 | private $lbFactory; |
| 44 | |
| 45 | /** |
| 46 | * @var JobQueueGroup |
| 47 | */ |
| 48 | private $queueGroup; |
| 49 | |
| 50 | /** |
| 51 | * @var BagOStuff |
| 52 | */ |
| 53 | private $stash; |
| 54 | |
| 55 | /** |
| 56 | * @var ReadOnlyMode |
| 57 | */ |
| 58 | private $readOnlyMode; |
| 59 | |
| 60 | /** |
| 61 | * @var HashBagOStuff |
| 62 | */ |
| 63 | private $cache; |
| 64 | |
| 65 | /** |
| 66 | * @var HashBagOStuff |
| 67 | */ |
| 68 | private $latestUpdateCache; |
| 69 | |
| 70 | /** |
| 71 | * @var array[][] Looks like $cacheIndex[Namespace ID][Target DB Key][User Id] => 'key' |
| 72 | * The index is needed so that on mass changes all relevant items can be un-cached. |
| 73 | * For example: Clearing a users watchlist of all items or updating notification timestamps |
| 74 | * for all users watching a single target. |
| 75 | * @phan-var array<int,array<string,array<int,string>>> |
| 76 | */ |
| 77 | private $cacheIndex = []; |
| 78 | |
| 79 | /** |
| 80 | * @var callable|null |
| 81 | */ |
| 82 | private $deferredUpdatesAddCallableUpdateCallback; |
| 83 | |
| 84 | /** |
| 85 | * @var int |
| 86 | */ |
| 87 | private $updateRowsPerQuery; |
| 88 | |
| 89 | /** |
| 90 | * @var NamespaceInfo |
| 91 | */ |
| 92 | private $nsInfo; |
| 93 | |
| 94 | /** |
| 95 | * @var RevisionLookup |
| 96 | */ |
| 97 | private $revisionLookup; |
| 98 | |
| 99 | /** |
| 100 | * @var StatsdDataFactoryInterface |
| 101 | */ |
| 102 | private $stats; |
| 103 | |
| 104 | /** |
| 105 | * @var bool Correlates to $wgWatchlistExpiry feature flag. |
| 106 | */ |
| 107 | private $expiryEnabled; |
| 108 | |
| 109 | /** |
| 110 | * @var LinkBatchFactory |
| 111 | */ |
| 112 | private $linkBatchFactory; |
| 113 | |
| 114 | /** |
| 115 | * @var string|null Maximum configured relative expiry. |
| 116 | */ |
| 117 | private $maxExpiryDuration; |
| 118 | |
| 119 | /** @var float corresponds to $wgWatchlistPurgeRate value */ |
| 120 | private $watchlistPurgeRate; |
| 121 | |
| 122 | /** |
| 123 | * @param ServiceOptions $options |
| 124 | * @param ILBFactory $lbFactory |
| 125 | * @param JobQueueGroup $queueGroup |
| 126 | * @param BagOStuff $stash |
| 127 | * @param HashBagOStuff $cache |
| 128 | * @param ReadOnlyMode $readOnlyMode |
| 129 | * @param NamespaceInfo $nsInfo |
| 130 | * @param RevisionLookup $revisionLookup |
| 131 | * @param LinkBatchFactory $linkBatchFactory |
| 132 | */ |
| 133 | public function __construct( |
| 134 | ServiceOptions $options, |
| 135 | ILBFactory $lbFactory, |
| 136 | JobQueueGroup $queueGroup, |
| 137 | BagOStuff $stash, |
| 138 | HashBagOStuff $cache, |
| 139 | ReadOnlyMode $readOnlyMode, |
| 140 | NamespaceInfo $nsInfo, |
| 141 | RevisionLookup $revisionLookup, |
| 142 | LinkBatchFactory $linkBatchFactory |
| 143 | ) { |
| 144 | $options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); |
| 145 | $this->updateRowsPerQuery = $options->get( MainConfigNames::UpdateRowsPerQuery ); |
| 146 | $this->expiryEnabled = $options->get( MainConfigNames::WatchlistExpiry ); |
| 147 | $this->maxExpiryDuration = $options->get( MainConfigNames::WatchlistExpiryMaxDuration ); |
| 148 | $this->watchlistPurgeRate = $options->get( MainConfigNames::WatchlistPurgeRate ); |
| 149 | |
| 150 | $this->lbFactory = $lbFactory; |
| 151 | $this->queueGroup = $queueGroup; |
| 152 | $this->stash = $stash; |
| 153 | $this->cache = $cache; |
| 154 | $this->readOnlyMode = $readOnlyMode; |
| 155 | $this->stats = new NullStatsdDataFactory(); |
| 156 | $this->deferredUpdatesAddCallableUpdateCallback = |
| 157 | [ DeferredUpdates::class, 'addCallableUpdate' ]; |
| 158 | $this->nsInfo = $nsInfo; |
| 159 | $this->revisionLookup = $revisionLookup; |
| 160 | $this->linkBatchFactory = $linkBatchFactory; |
| 161 | |
| 162 | $this->latestUpdateCache = new HashBagOStuff( [ 'maxKeys' => 3 ] ); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * @param StatsdDataFactoryInterface $stats |
| 167 | */ |
| 168 | public function setStatsdDataFactory( StatsdDataFactoryInterface $stats ) { |
| 169 | $this->stats = $stats; |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * Overrides the DeferredUpdates::addCallableUpdate callback |
| 174 | * This is intended for use while testing and will fail if MW_PHPUNIT_TEST is not defined. |
| 175 | * |
| 176 | * @param callable $callback |
| 177 | * |
| 178 | * @see DeferredUpdates::addCallableUpdate for callback signiture |
| 179 | * |
| 180 | * @return ScopedCallback to reset the overridden value |
| 181 | * @throws MWException |
| 182 | */ |
| 183 | public function overrideDeferredUpdatesAddCallableUpdateCallback( callable $callback ) { |
| 184 | if ( !defined( 'MW_PHPUNIT_TEST' ) ) { |
| 185 | throw new MWException( |
| 186 | 'Cannot override DeferredUpdates::addCallableUpdate callback in operation.' |
| 187 | ); |
| 188 | } |
| 189 | $previousValue = $this->deferredUpdatesAddCallableUpdateCallback; |
| 190 | $this->deferredUpdatesAddCallableUpdateCallback = $callback; |
| 191 | return new ScopedCallback( function () use ( $previousValue ) { |
| 192 | $this->deferredUpdatesAddCallableUpdateCallback = $previousValue; |
| 193 | } ); |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * @param UserIdentity $user |
| 198 | * @param LinkTarget|PageIdentity $target |
| 199 | * @return string |
| 200 | */ |
| 201 | private function getCacheKey( UserIdentity $user, $target ): string { |
| 202 | return $this->cache->makeKey( |
| 203 | (string)$target->getNamespace(), |
| 204 | $target->getDBkey(), |
| 205 | (string)$user->getId() |
| 206 | ); |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * @param WatchedItem $item |
| 211 | */ |
| 212 | private function cache( WatchedItem $item ) { |
| 213 | $user = $item->getUserIdentity(); |
| 214 | $target = $item->getTarget(); |
| 215 | $key = $this->getCacheKey( $user, $target ); |
| 216 | $this->cache->set( $key, $item ); |
| 217 | $this->cacheIndex[$target->getNamespace()][$target->getDBkey()][$user->getId()] = $key; |
| 218 | $this->stats->increment( 'WatchedItemStore.cache' ); |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * @param UserIdentity $user |
| 223 | * @param LinkTarget|PageIdentity $target |
| 224 | */ |
| 225 | private function uncache( UserIdentity $user, $target ) { |
| 226 | $this->cache->delete( $this->getCacheKey( $user, $target ) ); |
| 227 | unset( $this->cacheIndex[$target->getNamespace()][$target->getDBkey()][$user->getId()] ); |
| 228 | $this->stats->increment( 'WatchedItemStore.uncache' ); |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * @param LinkTarget|PageIdentity $target |
| 233 | */ |
| 234 | private function uncacheLinkTarget( $target ) { |
| 235 | $this->stats->increment( 'WatchedItemStore.uncacheLinkTarget' ); |
| 236 | if ( !isset( $this->cacheIndex[$target->getNamespace()][$target->getDBkey()] ) ) { |
| 237 | return; |
| 238 | } |
| 239 | foreach ( $this->cacheIndex[$target->getNamespace()][$target->getDBkey()] as $key ) { |
| 240 | $this->stats->increment( 'WatchedItemStore.uncacheLinkTarget.items' ); |
| 241 | $this->cache->delete( $key ); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | /** |
| 246 | * @param UserIdentity $user |
| 247 | */ |
| 248 | private function uncacheUser( UserIdentity $user ) { |
| 249 | $this->stats->increment( 'WatchedItemStore.uncacheUser' ); |
| 250 | foreach ( $this->cacheIndex as $dbKeyArray ) { |
| 251 | foreach ( $dbKeyArray as $userArray ) { |
| 252 | if ( isset( $userArray[$user->getId()] ) ) { |
| 253 | $this->stats->increment( 'WatchedItemStore.uncacheUser.items' ); |
| 254 | $this->cache->delete( $userArray[$user->getId()] ); |
| 255 | } |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | $pageSeenKey = $this->getPageSeenTimestampsKey( $user ); |
| 260 | $this->latestUpdateCache->delete( $pageSeenKey ); |
| 261 | $this->stash->delete( $pageSeenKey ); |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * @param UserIdentity $user |
| 266 | * @param LinkTarget|PageIdentity $target |
| 267 | * |
| 268 | * @return WatchedItem|false |
| 269 | */ |
| 270 | private function getCached( UserIdentity $user, $target ) { |
| 271 | return $this->cache->get( $this->getCacheKey( $user, $target ) ); |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * Helper method to deduplicate logic around queries that need to be modified |
| 276 | * if watchlist expiration is enabled |
| 277 | * |
| 278 | * @param SelectQueryBuilder $queryBuilder |
| 279 | * @param IDatabase $db |
| 280 | */ |
| 281 | private function modifyQueryBuilderForExpiry( |
| 282 | SelectQueryBuilder $queryBuilder, |
| 283 | IDatabase $db |
| 284 | ) { |
| 285 | if ( $this->expiryEnabled ) { |
| 286 | $queryBuilder->where( 'we_expiry IS NULL OR we_expiry > ' . $db->addQuotes( $db->timestamp() ) ); |
| 287 | $queryBuilder->leftJoin( 'watchlist_expiry', null, 'wl_id = we_item' ); |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Deletes ALL watched items for the given user when under |
| 293 | * $updateRowsPerQuery entries exist. |
| 294 | * |
| 295 | * @since 1.30 |
| 296 | * |
| 297 | * @param UserIdentity $user |
| 298 | * |
| 299 | * @return bool true on success, false when too many items are watched |
| 300 | */ |
| 301 | public function clearUserWatchedItems( UserIdentity $user ): bool { |
| 302 | if ( $this->mustClearWatchedItemsUsingJobQueue( $user ) ) { |
| 303 | return false; |
| 304 | } |
| 305 | |
| 306 | $dbw = $this->lbFactory->getPrimaryDatabase(); |
| 307 | |
| 308 | if ( $this->expiryEnabled ) { |
| 309 | $ticket = $this->lbFactory->getEmptyTransactionTicket( __METHOD__ ); |
| 310 | // First fetch the wl_ids. |
| 311 | $wlIds = $dbw->newSelectQueryBuilder() |
| 312 | ->select( 'wl_id' ) |
| 313 | ->from( 'watchlist' ) |
| 314 | ->where( [ 'wl_user' => $user->getId() ] ) |
| 315 | ->caller( __METHOD__ ) |
| 316 | ->fetchFieldValues(); |
| 317 | if ( $wlIds ) { |
| 318 | // Delete rows from both the watchlist and watchlist_expiry tables. |
| 319 | $dbw->delete( |
| 320 | 'watchlist', |
| 321 | [ 'wl_id' => $wlIds ], |
| 322 | __METHOD__ |
| 323 | ); |
| 324 | |
| 325 | $dbw->delete( |
| 326 | 'watchlist_expiry', |
| 327 | [ 'we_item' => $wlIds ], |
| 328 | __METHOD__ |
| 329 | ); |
| 330 | } |
| 331 | $this->lbFactory->commitAndWaitForReplication( __METHOD__, $ticket ); |
| 332 | } else { |
| 333 | $dbw->delete( |
| 334 | 'watchlist', |
| 335 | [ 'wl_user' => $user->getId() ], |
| 336 | __METHOD__ |
| 337 | ); |
| 338 | } |
| 339 | |
| 340 | $this->uncacheAllItemsForUser( $user ); |
| 341 | |
| 342 | return true; |
| 343 | } |
| 344 | |
| 345 | /** |
| 346 | * @param UserIdentity $user |
| 347 | * @return bool |
| 348 | */ |
| 349 | public function mustClearWatchedItemsUsingJobQueue( UserIdentity $user ): bool { |
| 350 | return $this->countWatchedItems( $user ) > $this->updateRowsPerQuery; |
| 351 | } |
| 352 | |
| 353 | /** |
| 354 | * @param UserIdentity $user |
| 355 | */ |
| 356 | private function uncacheAllItemsForUser( UserIdentity $user ) { |
| 357 | $userId = $user->getId(); |
| 358 | foreach ( $this->cacheIndex as $ns => $dbKeyIndex ) { |
| 359 | foreach ( $dbKeyIndex as $dbKey => $userIndex ) { |
| 360 | if ( array_key_exists( $userId, $userIndex ) ) { |
| 361 | $this->cache->delete( $userIndex[$userId] ); |
| 362 | unset( $this->cacheIndex[$ns][$dbKey][$userId] ); |
| 363 | } |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | // Cleanup empty cache keys |
| 368 | foreach ( $this->cacheIndex as $ns => $dbKeyIndex ) { |
| 369 | foreach ( $dbKeyIndex as $dbKey => $userIndex ) { |
| 370 | if ( empty( $this->cacheIndex[$ns][$dbKey] ) ) { |
| 371 | unset( $this->cacheIndex[$ns][$dbKey] ); |
| 372 | } |
| 373 | } |
| 374 | if ( empty( $this->cacheIndex[$ns] ) ) { |
| 375 | unset( $this->cacheIndex[$ns] ); |
| 376 | } |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | /** |
| 381 | * Queues a job that will clear the users watchlist using the Job Queue. |
| 382 | * |
| 383 | * @since 1.31 |
| 384 | * |
| 385 | * @param UserIdentity $user |
| 386 | */ |
| 387 | public function clearUserWatchedItemsUsingJobQueue( UserIdentity $user ) { |
| 388 | $job = ClearUserWatchlistJob::newForUser( $user, $this->getMaxId() ); |
| 389 | $this->queueGroup->push( $job ); |
| 390 | } |
| 391 | |
| 392 | /** |
| 393 | * @inheritDoc |
| 394 | */ |
| 395 | public function maybeEnqueueWatchlistExpiryJob(): void { |
| 396 | if ( !$this->expiryEnabled ) { |
| 397 | // No need to purge expired entries if there are none |
| 398 | return; |
| 399 | } |
| 400 | |
| 401 | $max = mt_getrandmax(); |
| 402 | if ( mt_rand( 0, $max ) < $max * $this->watchlistPurgeRate ) { |
| 403 | // The higher the watchlist purge rate, the more likely we are to enqueue a job. |
| 404 | $this->queueGroup->lazyPush( new WatchlistExpiryJob() ); |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * @since 1.31 |
| 410 | * @return int The maximum current wl_id |
| 411 | */ |
| 412 | public function getMaxId(): int { |
| 413 | return (int)$this->lbFactory->getReplicaDatabase()->newSelectQueryBuilder() |
| 414 | ->select( 'MAX(wl_id)' ) |
| 415 | ->from( 'watchlist' ) |
| 416 | ->caller( __METHOD__ ) |
| 417 | ->fetchField(); |
| 418 | } |
| 419 | |
| 420 | /** |
| 421 | * @since 1.31 |
| 422 | * @param UserIdentity $user |
| 423 | * @return int |
| 424 | */ |
| 425 | public function countWatchedItems( UserIdentity $user ): int { |
| 426 | $dbr = $this->lbFactory->getReplicaDatabase(); |
| 427 | $queryBuilder = $this->lbFactory->getReplicaDatabase()->newSelectQueryBuilder() |
| 428 | ->select( 'COUNT(*)' ) |
| 429 | ->from( 'watchlist' ) |
| 430 | ->where( [ 'wl_user' => $user->getId() ] ) |
| 431 | ->caller( __METHOD__ ); |
| 432 | |
| 433 | $this->modifyQueryBuilderForExpiry( $queryBuilder, $dbr ); |
| 434 | |
| 435 | return (int)$queryBuilder->fetchField(); |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * @since 1.27 |
| 440 | * @param LinkTarget|PageIdentity $target deprecated passing LinkTarget since 1.36 |
| 441 | * @return int |
| 442 | */ |
| 443 | public function countWatchers( $target ): int { |
| 444 | $dbr = $this->lbFactory->getReplicaDatabase(); |
| 445 | $queryBuilder = $dbr->newSelectQueryBuilder() |
| 446 | ->select( 'COUNT(*)' ) |
| 447 | ->from( 'watchlist' ) |
| 448 | ->where( [ |
| 449 | 'wl_namespace' => $target->getNamespace(), |
| 450 | 'wl_title' => $target->getDBkey() |
| 451 | ] ) |
| 452 | ->caller( __METHOD__ ); |
| 453 | |
| 454 | $this->modifyQueryBuilderForExpiry( $queryBuilder, $dbr ); |
| 455 | |
| 456 | return (int)$queryBuilder->fetchField(); |
| 457 | } |
| 458 | |
| 459 | /** |
| 460 | * @since 1.27 |
| 461 | * @param LinkTarget|PageIdentity $target deprecated passing LinkTarget since 1.36 |
| 462 | * @param string|int $threshold |
| 463 | * @return int |
| 464 | */ |
| 465 | public function countVisitingWatchers( $target, $threshold ): int { |
| 466 | $dbr = $this->lbFactory->getReplicaDatabase(); |
| 467 | $queryBuilder = $dbr->newSelectQueryBuilder() |
| 468 | ->select( 'COUNT(*)' ) |
| 469 | ->from( 'watchlist' ) |
| 470 | ->where( [ |
| 471 | 'wl_namespace' => $target->getNamespace(), |
| 472 | 'wl_title' => $target->getDBkey(), |
| 473 | 'wl_notificationtimestamp >= ' . |
| 474 | $dbr->addQuotes( $dbr->timestamp( $threshold ) ) . |
| 475 | ' OR wl_notificationtimestamp IS NULL' |
| 476 | ] ) |
| 477 | ->caller( __METHOD__ ); |
| 478 | |
| 479 | $this->modifyQueryBuilderForExpiry( $queryBuilder, $dbr ); |
| 480 | |
| 481 | return (int)$queryBuilder->fetchField(); |
| 482 | } |
| 483 | |
| 484 | /** |
| 485 | * @param UserIdentity $user |
| 486 | * @param LinkTarget[]|PageIdentity[] $titles deprecated passing LinkTarget[] since 1.36 |
| 487 | * @return bool |
| 488 | */ |
| 489 | public function removeWatchBatchForUser( UserIdentity $user, array $titles ): bool { |
| 490 | if ( $this->readOnlyMode->isReadOnly() ) { |
| 491 | return false; |
| 492 | } |
| 493 | if ( !$user->isRegistered() ) { |
| 494 | return false; |
| 495 | } |
| 496 | if ( !$titles ) { |
| 497 | return true; |
| 498 | } |
| 499 | |
| 500 | $rows = $this->getTitleDbKeysGroupedByNamespace( $titles ); |
| 501 | $this->uncacheTitlesForUser( $user, $titles ); |
| 502 | |
| 503 | $dbw = $this->lbFactory->getPrimaryDatabase(); |
| 504 | $ticket = count( $titles ) > $this->updateRowsPerQuery ? |
| 505 | $this->lbFactory->getEmptyTransactionTicket( __METHOD__ ) : null; |
| 506 | $affectedRows = 0; |
| 507 | |
| 508 | // Batch delete items per namespace. |
| 509 | foreach ( $rows as $namespace => $namespaceTitles ) { |
| 510 | $rowBatches = array_chunk( $namespaceTitles, $this->updateRowsPerQuery ); |
| 511 | foreach ( $rowBatches as $toDelete ) { |
| 512 | // First fetch the wl_ids. |
| 513 | $wlIds = $dbw->newSelectQueryBuilder() |
| 514 | ->select( 'wl_id' ) |
| 515 | ->from( 'watchlist' ) |
| 516 | ->where( |
| 517 | [ |
| 518 | 'wl_user' => $user->getId(), |
| 519 | 'wl_namespace' => $namespace, |
| 520 | 'wl_title' => $toDelete |
| 521 | ] |
| 522 | ) |
| 523 | ->caller( __METHOD__ ) |
| 524 | ->fetchFieldValues(); |
| 525 | |
| 526 | if ( $wlIds ) { |
| 527 | // Delete rows from both the watchlist and watchlist_expiry tables. |
| 528 | $dbw->delete( |
| 529 | 'watchlist', |
| 530 | [ 'wl_id' => $wlIds ], |
| 531 | __METHOD__ |
| 532 | ); |
| 533 | $affectedRows += $dbw->affectedRows(); |
| 534 | |
| 535 | if ( $this->expiryEnabled ) { |
| 536 | $dbw->delete( |
| 537 | 'watchlist_expiry', |
| 538 | [ 'we_item' => $wlIds ], |
| 539 | __METHOD__ |
| 540 | ); |
| 541 | $affectedRows += $dbw->affectedRows(); |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | if ( $ticket ) { |
| 546 | $this->lbFactory->commitAndWaitForReplication( __METHOD__, $ticket ); |
| 547 | } |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | return (bool)$affectedRows; |
| 552 | } |
| 553 | |
| 554 | /** |
| 555 | * @since 1.27 |
| 556 | * @param LinkTarget[]|PageIdentity[] $targets deprecated passing LinkTarget[] since 1.36 |
| 557 | * @param array $options Supported options are: |
| 558 | * - 'minimumWatchers': filter for pages that have at least a minimum number of watchers |
| 559 | * @return array |
| 560 | */ |
| 561 | public function countWatchersMultiple( array $targets, array $options = [] ): array { |
| 562 | $linkTargets = array_map( static function ( $target ) { |
| 563 | if ( !$target instanceof LinkTarget ) { |
| 564 | return new TitleValue( $target->getNamespace(), $target->getDBkey() ); |
| 565 | } |
| 566 | return $target; |
| 567 | }, $targets ); |
| 568 | $lb = $this->linkBatchFactory->newLinkBatch( $linkTargets ); |
| 569 | $dbr = $this->lbFactory->getReplicaDatabase(); |
| 570 | $queryBuilder = $dbr->newSelectQueryBuilder(); |
| 571 | $queryBuilder |
| 572 | ->select( [ 'wl_title', 'wl_namespace', 'watchers' => 'COUNT(*)' ] ) |
| 573 | ->from( 'watchlist' ) |
| 574 | ->where( [ $lb->constructSet( 'wl', $dbr ) ] ) |
| 575 | ->groupBy( [ 'wl_namespace', 'wl_title' ] ) |
| 576 | ->caller( __METHOD__ ); |
| 577 | |
| 578 | if ( array_key_exists( 'minimumWatchers', $options ) ) { |
| 579 | $queryBuilder->having( 'COUNT(*) >= ' . (int)$options['minimumWatchers'] ); |
| 580 | } |
| 581 | |
| 582 | $this->modifyQueryBuilderForExpiry( $queryBuilder, $dbr ); |
| 583 | |
| 584 | $res = $queryBuilder->fetchResultSet(); |
| 585 | |
| 586 | $watchCounts = []; |
| 587 | foreach ( $targets as $linkTarget ) { |
| 588 | $watchCounts[$linkTarget->getNamespace()][$linkTarget->getDBkey()] = 0; |
| 589 | } |
| 590 | |
| 591 | foreach ( $res as $row ) { |
| 592 | $watchCounts[$row->wl_namespace][$row->wl_title] = (int)$row->watchers; |
| 593 | } |
| 594 | |
| 595 | return $watchCounts; |
| 596 | } |
| 597 | |
| 598 | /** |
| 599 | * @since 1.27 |
| 600 | * @param array $targetsWithVisitThresholds array of LinkTarget[]|PageIdentity[] (not type |
| 601 | * hinted since it annoys phan) - deprecated passing LinkTarget[] since 1.36 |
| 602 | * @param int|null $minimumWatchers |
| 603 | * @return int[][] two dimensional array, first is namespace, second is database key, |
| 604 | * value is the number of watchers |
| 605 | */ |
| 606 | public function countVisitingWatchersMultiple( |
| 607 | array $targetsWithVisitThresholds, |
| 608 | $minimumWatchers = null |
| 609 | ): array { |
| 610 | if ( $targetsWithVisitThresholds === [] ) { |
| 611 | // No titles requested => no results returned |
| 612 | return []; |
| 613 | } |
| 614 | |