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| 1 | <?php |
| 2 | |
| 3 | namespace CirrusSearch; |
| 4 | |
| 5 | use CirrusSearch\Job\CirrusTitleJob; |
| 6 | use CirrusSearch\Job\DeletePages; |
| 7 | use CirrusSearch\Job\LinksUpdate; |
| 8 | use CirrusSearch\Job\UpdateRedirectDocument; |
| 9 | use MediaWiki\Config\ConfigFactory; |
| 10 | use MediaWiki\Deferred\DeferredUpdates; |
| 11 | use MediaWiki\Deferred\Hook\LinksUpdateCompleteHook; |
| 12 | use MediaWiki\Deferred\LinksUpdate\LinksTable; |
| 13 | use MediaWiki\Hook\PageMoveCompleteHook; |
| 14 | use MediaWiki\Hook\TitleMoveHook; |
| 15 | use MediaWiki\JobQueue\JobQueueGroup; |
| 16 | use MediaWiki\Logger\LoggerFactory; |
| 17 | use MediaWiki\Logging\ManualLogEntry; |
| 18 | use MediaWiki\Page\Hook\PageDeleteCompleteHook; |
| 19 | use MediaWiki\Page\Hook\PageDeleteHook; |
| 20 | use MediaWiki\Page\PageReference; |
| 21 | use MediaWiki\Page\ProperPageIdentity; |
| 22 | use MediaWiki\Page\RedirectLookup; |
| 23 | use MediaWiki\Permissions\Authority; |
| 24 | use MediaWiki\Revision\RevisionRecord; |
| 25 | use MediaWiki\Revision\SlotRecord; |
| 26 | use MediaWiki\RevisionDelete\Hook\ArticleRevisionVisibilitySetHook; |
| 27 | use MediaWiki\Status\Status; |
| 28 | use MediaWiki\Title\Title; |
| 29 | use MediaWiki\Upload\Hook\UploadCompleteHook; |
| 30 | use MediaWiki\Upload\UploadBase; |
| 31 | use MediaWiki\User\User; |
| 32 | use MediaWiki\Utils\MWTimestamp; |
| 33 | use Wikimedia\Assert\Assert; |
| 34 | use Wikimedia\Rdbms\IConnectionProvider; |
| 35 | |
| 36 | /** |
| 37 | * Implementation to all the hooks that CirrusSearch needs to listen in order to keep its index |
| 38 | * in sync with main SQL database. |
| 39 | */ |
| 40 | class ChangeListener extends PageChangeTracker implements |
| 41 | LinksUpdateCompleteHook, |
| 42 | TitleMoveHook, |
| 43 | PageMoveCompleteHook, |
| 44 | UploadCompleteHook, |
| 45 | ArticleRevisionVisibilitySetHook, |
| 46 | PageDeleteHook, |
| 47 | PageDeleteCompleteHook |
| 48 | { |
| 49 | private JobQueueGroup $jobQueue; |
| 50 | private SearchConfig $searchConfig; |
| 51 | private IConnectionProvider $dbProvider; |
| 52 | private RedirectLookup $redirectLookup; |
| 53 | |
| 54 | /** @var Connection */ |
| 55 | private $connection; |
| 56 | |
| 57 | /** @var array state holding the titles being moved */ |
| 58 | private $movingTitles = []; |
| 59 | |
| 60 | public static function create( |
| 61 | JobQueueGroup $jobQueue, |
| 62 | ConfigFactory $configFactory, |
| 63 | IConnectionProvider $dbProvider, |
| 64 | RedirectLookup $redirectLookup |
| 65 | ): ChangeListener { |
| 66 | /** @phan-suppress-next-line PhanTypeMismatchArgumentSuperType $config is actually a SearchConfig */ |
| 67 | return new self( $jobQueue, $configFactory->makeConfig( CirrusSearch::NAME ), $dbProvider, $redirectLookup ); |
| 68 | } |
| 69 | |
| 70 | public function __construct( |
| 71 | JobQueueGroup $jobQueue, |
| 72 | SearchConfig $searchConfig, |
| 73 | IConnectionProvider $dbProvider, |
| 74 | RedirectLookup $redirectLookup |
| 75 | ) { |
| 76 | parent::__construct(); |
| 77 | $this->jobQueue = $jobQueue; |
| 78 | $this->searchConfig = $searchConfig; |
| 79 | $this->dbProvider = $dbProvider; |
| 80 | $this->redirectLookup = $redirectLookup; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Check whether at least one cluster is writeable or not. |
| 85 | * If not there are no reasons to schedule a job. |
| 86 | * |
| 87 | * @return bool true if at least one cluster is writeable |
| 88 | */ |
| 89 | private function isEnabled(): bool { |
| 90 | return $this->searchConfig |
| 91 | ->getClusterAssignment() |
| 92 | ->getWritableClusters( UpdateGroup::PAGE ) != []; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Called when a revision is deleted. In theory, we shouldn't need to to this since |
| 97 | * you can't delete the current text of a page (so we should've already updated when |
| 98 | * the page was updated last). But we're paranoid, because deleted revisions absolutely |
| 99 | * should not be in the index. |
| 100 | * |
| 101 | * @param Title $title The page title we've had a revision deleted on |
| 102 | * @param int[] $ids IDs to set the visibility for |
| 103 | * @param array $visibilityChangeMap Map of revision ID to oldBits and newBits. |
| 104 | * This array can be examined to determine exactly what visibility bits |
| 105 | * have changed for each revision. This array is of the form: |
| 106 | * [id => ['oldBits' => $oldBits, 'newBits' => $newBits], ... ] |
| 107 | */ |
| 108 | public function onArticleRevisionVisibilitySet( $title, $ids, $visibilityChangeMap ) { |
| 109 | if ( !$this->isEnabled() ) { |
| 110 | return; |
| 111 | } |
| 112 | $this->jobQueue->lazyPush( LinksUpdate::newPastRevisionVisibilityChange( $title ) ); |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Hooked to update the search index when pages change directly or when templates that |
| 117 | * they include change. |
| 118 | * @param \MediaWiki\Deferred\LinksUpdate\LinksUpdate $linksUpdate |
| 119 | * @param mixed $ticket Prior result of LBFactory::getEmptyTransactionTicket() |
| 120 | */ |
| 121 | public function onLinksUpdateComplete( $linksUpdate, $ticket ) { |
| 122 | if ( !$this->isEnabled() ) { |
| 123 | return; |
| 124 | } |
| 125 | // defer processing the LinksUpdateComplete hook until other hooks tagged in PageChangeTracker |
| 126 | // have a chance to run. Reason is that we want to detect what are the links updates triggered |
| 127 | // by a "page change". The definition of a "page change" we use is the one used by EventBus |
| 128 | // PageChangeHooks. |
| 129 | DeferredUpdates::addCallableUpdate( function () use ( $linksUpdate ) { |
| 130 | $linkedArticlesToUpdate = $this->searchConfig->get( CirrusConfigNames::LinkedArticlesToUpdate ); |
| 131 | $unLinkedArticlesToUpdate = $this->searchConfig->get( CirrusConfigNames::UnlinkedArticlesToUpdate ); |
| 132 | $updateDelay = $this->searchConfig->get( CirrusConfigNames::UpdateDelay ); |
| 133 | |
| 134 | // Page changes are prioritized over plain refreshes; the main job and the |
| 135 | // redirect-document job share the same delay tier. |
| 136 | $isPageChange = $this->isPageChange( $linksUpdate->getPageId() ); |
| 137 | $delay = $updateDelay[ $isPageChange ? 'prioritized' : 'default' ]; |
| 138 | |
| 139 | // Titles created by a move should always be redirects. Push a redirect job if needed and |
| 140 | // skip the links update as we will separately be refreshing the target page. |
| 141 | if ( in_array( $linksUpdate->getTitle()->getPrefixedDBkey(), $this->movingTitles ) ) { |
| 142 | if ( $this->searchConfig->buildRedirectDocuments() |
| 143 | && $this->isRedirectRevision( $linksUpdate->getRevisionRecord() ) |
| 144 | ) { |
| 145 | $this->pushRedirectDocumentJob( |
| 146 | true, |
| 147 | $linksUpdate->getTitle(), |
| 148 | $linksUpdate->getRevisionRecord(), |
| 149 | LinksUpdate::buildJobDelayOptions( |
| 150 | UpdateRedirectDocument::class, |
| 151 | $delay, |
| 152 | $this->jobQueue |
| 153 | ) |
| 154 | ); |
| 155 | } |
| 156 | return; |
| 157 | } |
| 158 | |
| 159 | $params = []; |
| 160 | if ( $this->searchConfig->get( CirrusConfigNames::EnableIncomingLinkCounting ) ) { |
| 161 | $params['addedLinks'] = self::preparePageReferencesForLinksUpdate( |
| 162 | $linksUpdate->getPageReferenceArray( 'pagelinks', LinksTable::INSERTED ), |
| 163 | $linkedArticlesToUpdate |
| 164 | ); |
| 165 | // We exclude links that contains invalid UTF-8 sequences, reason is that page created |
| 166 | // before T13143 was fixed might sill have bad links the pagelinks table |
| 167 | // and thus will cause LinksUpdate to believe that these links are removed. |
| 168 | $params['removedLinks'] = self::preparePageReferencesForLinksUpdate( |
| 169 | $linksUpdate->getPageReferenceArray( 'pagelinks', LinksTable::DELETED ), |
| 170 | $unLinkedArticlesToUpdate, |
| 171 | true |
| 172 | ); |
| 173 | } |
| 174 | |
| 175 | if ( $isPageChange ) { |
| 176 | $jobParams = $params + LinksUpdate::buildJobDelayOptions( LinksUpdate::class, |
| 177 | $delay, $this->jobQueue ); |
| 178 | $job = LinksUpdate::newPageChangeUpdate( $linksUpdate->getTitle(), |
| 179 | $linksUpdate->getRevisionRecord(), $jobParams ); |
| 180 | if ( ( MWTimestamp::time() - $job->params[CirrusTitleJob::ROOT_EVENT_TIME] ) > ( 3600 * 24 ) ) { |
| 181 | LoggerFactory::getInstance( LogChannel::DEFAULT )->debug( |
| 182 | "Scheduled a page-change-update for {title} on a revision created more than 24hours ago, " . |
| 183 | "the cause is {causeAction}", |
| 184 | [ |
| 185 | 'title' => $linksUpdate->getTitle()->getPrefixedDBkey(), |
| 186 | 'causeAction' => $linksUpdate->getCauseAction() |
| 187 | ] ); |
| 188 | } |
| 189 | } else { |
| 190 | $job = LinksUpdate::newPageRefreshUpdate( $linksUpdate->getTitle(), |
| 191 | $params + LinksUpdate::buildJobDelayOptions( LinksUpdate::class, |
| 192 | $delay, $this->jobQueue ) ); |
| 193 | } |
| 194 | $this->jobQueue->lazyPush( $job ); |
| 195 | |
| 196 | // A redirect page needs its own document indexed alongside the target refresh. |
| 197 | if ( |
| 198 | $this->searchConfig->buildRedirectDocuments() |
| 199 | && $this->isRedirectRevision( $linksUpdate->getRevisionRecord() ) |
| 200 | ) { |
| 201 | $this->pushRedirectDocumentJob( $isPageChange, $linksUpdate->getTitle(), |
| 202 | $linksUpdate->getRevisionRecord(), |
| 203 | LinksUpdate::buildJobDelayOptions( UpdateRedirectDocument::class, |
| 204 | $delay, $this->jobQueue ) ); |
| 205 | } |
| 206 | } ); |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Push the job that writes a redirect page's own document. A page-change update |
| 211 | * carries the triggering revision record; a page-refresh update does not. |
| 212 | * |
| 213 | * @param bool $isPageChange whether this is a page-change (vs page-refresh) update |
| 214 | * @param Title $title the redirect page |
| 215 | * @param ?RevisionRecord $revisionRecord the redirect revision (page-change only) |
| 216 | * @param array $params job params, e.g. job delay options |
| 217 | */ |
| 218 | private function pushRedirectDocumentJob( |
| 219 | bool $isPageChange, Title $title, ?RevisionRecord $revisionRecord, array $params |
| 220 | ): void { |
| 221 | $job = $isPageChange |
| 222 | ? UpdateRedirectDocument::newPageChangeUpdate( $title, $revisionRecord, $params ) |
| 223 | : UpdateRedirectDocument::newPageRefreshUpdate( $title, $params ); |
| 224 | $this->jobQueue->lazyPush( $job ); |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * @param RevisionRecord|null $revision |
| 229 | * @return bool whether the revision's main slot content is a redirect |
| 230 | */ |
| 231 | private function isRedirectRevision( ?RevisionRecord $revision ): bool { |
| 232 | return (bool)$revision?->getContent( SlotRecord::MAIN )?->isRedirect(); |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * Hook into UploadComplete, because overwritten files mistakenly do not trigger |
| 237 | * LinksUpdateComplete (T344285). Since files do contain indexed metadata |
| 238 | * we need to refresh the search index when a file is overwritten on an |
| 239 | * existing title. |
| 240 | * |
| 241 | * @param UploadBase $uploadBase |
| 242 | */ |
| 243 | public function onUploadComplete( $uploadBase ) { |
| 244 | if ( !$this->isEnabled() ) { |
| 245 | return; |
| 246 | } |
| 247 | if ( $uploadBase->getTitle()->exists() ) { |
| 248 | $this->jobQueue->lazyPush( LinksUpdate::newPageChangeUpdate( $uploadBase->getTitle(), null, [] ) ); |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | /** |
| 253 | * This hook is called before a page is deleted. |
| 254 | * |
| 255 | * @since 1.37 |
| 256 | * |
| 257 | * @param ProperPageIdentity $page Page being deleted. |
| 258 | * @param Authority $deleter Who is deleting the page |
| 259 | * @param string $reason Reason the page is being deleted |
| 260 | * @param \StatusValue $status Add any error here |
| 261 | * @param bool $suppress Whether this is a suppression deletion or not |
| 262 | * @return bool|void True or no return value to continue; false to abort, which also requires adding |
| 263 | * a fatal error to $status. |
| 264 | */ |
| 265 | public function onPageDelete( |
| 266 | ProperPageIdentity $page, |
| 267 | Authority $deleter, |
| 268 | string $reason, |
| 269 | \StatusValue $status, |
| 270 | bool $suppress |
| 271 | ) { |
| 272 | if ( !$this->isEnabled() ) { |
| 273 | return; |
| 274 | } |
| 275 | parent::onPageDelete( $page, $deleter, $reason, $status, $suppress ); |
| 276 | // We use this to pick up redirects so we can update their targets. |
| 277 | // Can't re-use PageDeleteComplete because the page info's |
| 278 | // already gone |
| 279 | // If we abort or fail deletion it's no big deal because this will |
| 280 | // end up being a no-op when it executes. |
| 281 | $targetLink = $this->redirectLookup->getRedirectTarget( $page ); |
| 282 | $target = null; |
| 283 | if ( $targetLink != null ) { |
| 284 | $target = Title::castFromLinkTarget( $targetLink ); |
| 285 | } |
| 286 | if ( $target ) { |
| 287 | $this->jobQueue->lazyPush( new Job\LinksUpdate( $target, [] ) ); |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * @param ProperPageIdentity $page |
| 293 | * @param Authority $deleter |
| 294 | * @param string $reason |
| 295 | * @param int $pageID |
| 296 | * @param RevisionRecord $deletedRev |
| 297 | * @param ManualLogEntry $logEntry |
| 298 | * @param int $archivedRevisionCount |
| 299 | * @return void |
| 300 | */ |
| 301 | public function onPageDeleteComplete( ProperPageIdentity $page, Authority $deleter, |
| 302 | string $reason, int $pageID, RevisionRecord $deletedRev, ManualLogEntry $logEntry, |
| 303 | int $archivedRevisionCount |
| 304 | ) { |
| 305 | if ( !$this->isEnabled() ) { |
| 306 | return; |
| 307 | } |
| 308 | parent::onPageDeleteComplete( $page, $deleter, $reason, $pageID, $deletedRev, $logEntry, 1 ); |
| 309 | // Note that we must use the article id provided or it'll be lost in the ether. The job can't |
| 310 | // load it from the title because the page row has already been deleted. |
| 311 | $title = Title::castFromPageIdentity( $page ); |
| 312 | Assert::postcondition( $title !== null, '$page can be cast to a Title' ); |
| 313 | $this->jobQueue->lazyPush( |
| 314 | DeletePages::build( |
| 315 | $title, |
| 316 | $this->searchConfig->makeId( $pageID ), |
| 317 | $logEntry->getTimestamp() !== false ? (int)MWTimestamp::convert( TS_UNIX, $logEntry->getTimestamp() ) : MWTimestamp::time() |
| 318 | ) |
| 319 | ); |
| 320 | } |
| 321 | |
| 322 | /** |
| 323 | * Before we've moved a title from $title to $newTitle. |
| 324 | * |
| 325 | * @param Title $old Old title |
| 326 | * @param Title $nt New title |
| 327 | * @param User $user User who does the move |
| 328 | * @param string $reason Reason provided by the user |
| 329 | * @param Status &$status To abort the move, add a fatal error to this object |
| 330 | * (i.e. call $status->fatal()) |
| 331 | * @return bool|void True or no return value to continue or false to abort |
| 332 | */ |
| 333 | public function onTitleMove( Title $old, Title $nt, User $user, $reason, Status &$status ) { |
| 334 | if ( !$this->isEnabled() ) { |
| 335 | return; |
| 336 | } |
| 337 | $this->movingTitles[] = $old->getPrefixedDBkey(); |
| 338 | } |
| 339 | |
| 340 | /** |
| 341 | * When we've moved a Title from A to B. |
| 342 | * @param \MediaWiki\Linker\LinkTarget $old Old title |
| 343 | * @param \MediaWiki\Linker\LinkTarget $new New title |
| 344 | * @param \MediaWiki\User\UserIdentity $user User who did the move |
| 345 | * @param int $pageid Database ID of the page that's been moved |
| 346 | * @param int $redirid Database ID of the created redirect |
| 347 | * @param string $reason Reason for the move |
| 348 | * @param \MediaWiki\Revision\RevisionRecord $revision RevisionRecord created by the move |
| 349 | * @return bool|void True or no return value to continue or false stop other hook handlers, |
| 350 | * doesn't abort the move itself |
| 351 | */ |
| 352 | public function onPageMoveComplete( |
| 353 | $old, $new, $user, $pageid, $redirid, |
| 354 | $reason, $revision |
| 355 | ) { |
| 356 | if ( !$this->isEnabled() ) { |
| 357 | return; |
| 358 | } |
| 359 | parent::onPageMoveComplete( $old, $new, $user, $pageid, $redirid, $reason, $revision ); |
| 360 | // When a page is moved the update and delete hooks are good enough to catch |
| 361 | // almost everything. The only thing they miss is if a page moves from one |
| 362 | // index to another. That only happens if it switches namespace. |
| 363 | if ( $old->getNamespace() === $new->getNamespace() ) { |
| 364 | return; |
| 365 | } |
| 366 | |
| 367 | $conn = $this->getConnection(); |
| 368 | $oldIndexSuffix = $conn->getIndexSuffixForNamespace( $old->getNamespace() ); |
| 369 | $newIndexSuffix = $conn->getIndexSuffixForNamespace( $new->getNamespace() ); |
| 370 | if ( $oldIndexSuffix !== $newIndexSuffix ) { |
| 371 | $title = Title::newFromLinkTarget( $old ); |
| 372 | $job = new Job\DeletePages( $title, [ |
| 373 | 'indexSuffix' => $oldIndexSuffix, |
| 374 | 'docId' => $this->searchConfig->makeId( $pageid ) |
| 375 | ] ); |
| 376 | // Push the job after DB commit but cancel on rollback |
| 377 | $this->dbProvider->getPrimaryDatabase()->onTransactionCommitOrIdle( function () use ( $job ) { |
| 378 | $this->jobQueue->lazyPush( $job ); |
| 379 | }, __METHOD__ ); |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | /** |
| 384 | * Take a list of titles either linked or unlinked and prepare them for Job\LinksUpdate. |
| 385 | * This includes limiting them to $max titles. |
| 386 | * @param PageReference[] $pageReferences titles to prepare |
| 387 | * @param int $max maximum number of titles to return |
| 388 | * @param bool $excludeBadUTF exclude links that contains invalid UTF sequences |
| 389 | * @return array |
| 390 | */ |
| 391 | public static function preparePageReferencesForLinksUpdate( $pageReferences, int $max, $excludeBadUTF = false ) { |
| 392 | $pageReferences = self::pickFromArray( $pageReferences, $max ); |
| 393 | $dBKeys = []; |
| 394 | foreach ( $pageReferences as $pageReference ) { |
| 395 | $title = Title::newFromPageReference( $pageReference ); |
| 396 | $key = $title->getPrefixedDBkey(); |
| 397 | if ( $excludeBadUTF ) { |
| 398 | $fixedKey = mb_convert_encoding( $key, 'UTF-8', 'UTF-8' ); |
| 399 | if ( $fixedKey !== $key ) { |
| 400 | LoggerFactory::getInstance( LogChannel::DEFAULT ) |
| 401 | ->warning( "Ignoring title {title} with invalid UTF-8 sequences.", |
| 402 | [ 'title' => $fixedKey ] ); |
| 403 | continue; |
| 404 | } |
| 405 | } |
| 406 | $dBKeys[] = $title->getPrefixedDBkey(); |
| 407 | } |
| 408 | return $dBKeys; |
| 409 | } |
| 410 | |
| 411 | /** |
| 412 | * Pick $num random entries from $array. |
| 413 | * @param array $array Array to pick from |
| 414 | * @param int $num Number of entries to pick |
| 415 | * @return array of entries from $array |
| 416 | */ |
| 417 | private static function pickFromArray( $array, $num ) { |
| 418 | if ( $num > count( $array ) ) { |
| 419 | return $array; |
| 420 | } |
| 421 | if ( $num < 1 ) { |
| 422 | return []; |
| 423 | } |
| 424 | $chosen = array_rand( $array, $num ); |
| 425 | // If $num === 1 then array_rand will return a key rather than an array of keys. |
| 426 | if ( !is_array( $chosen ) ) { |
| 427 | return [ $array[ $chosen ] ]; |
| 428 | } |
| 429 | $result = []; |
| 430 | foreach ( $chosen as $key ) { |
| 431 | $result[] = $array[ $key ]; |
| 432 | } |
| 433 | return $result; |
| 434 | } |
| 435 | |
| 436 | private function getConnection(): Connection { |
| 437 | if ( $this->connection === null ) { |
| 438 | $this->connection = new Connection( $this->searchConfig ); |
| 439 | } |
| 440 | return $this->connection; |
| 441 | } |
| 442 | } |