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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Page; |
| 4 | |
| 5 | use BadMethodCallException; |
| 6 | use BagOStuff; |
| 7 | use ChangeTags; |
| 8 | use Content; |
| 9 | use DeletePageJob; |
| 10 | use Exception; |
| 11 | use IDBAccessObject; |
| 12 | use JobQueueGroup; |
| 13 | use LogicException; |
| 14 | use ManualLogEntry; |
| 15 | use MediaWiki\Cache\BacklinkCacheFactory; |
| 16 | use MediaWiki\CommentStore\CommentStore; |
| 17 | use MediaWiki\Config\ServiceOptions; |
| 18 | use MediaWiki\Deferred\DeferrableUpdate; |
| 19 | use MediaWiki\Deferred\DeferredUpdates; |
| 20 | use MediaWiki\Deferred\LinksUpdate\LinksDeletionUpdate; |
| 21 | use MediaWiki\Deferred\LinksUpdate\LinksUpdate; |
| 22 | use MediaWiki\Deferred\SearchUpdate; |
| 23 | use MediaWiki\Deferred\SiteStatsUpdate; |
| 24 | use MediaWiki\HookContainer\HookContainer; |
| 25 | use MediaWiki\HookContainer\HookRunner; |
| 26 | use MediaWiki\Language\RawMessage; |
| 27 | use MediaWiki\Logger\LoggerFactory; |
| 28 | use MediaWiki\MainConfigNames; |
| 29 | use MediaWiki\Message\Message; |
| 30 | use MediaWiki\Permissions\Authority; |
| 31 | use MediaWiki\Permissions\PermissionStatus; |
| 32 | use MediaWiki\ResourceLoader\WikiModule; |
| 33 | use MediaWiki\Revision\RevisionRecord; |
| 34 | use MediaWiki\Revision\RevisionStore; |
| 35 | use MediaWiki\Revision\SlotRecord; |
| 36 | use MediaWiki\Status\Status; |
| 37 | use MediaWiki\Title\NamespaceInfo; |
| 38 | use MediaWiki\User\UserFactory; |
| 39 | use StatusValue; |
| 40 | use Wikimedia\IPUtils; |
| 41 | use Wikimedia\Message\ITextFormatter; |
| 42 | use Wikimedia\Message\MessageValue; |
| 43 | use Wikimedia\Rdbms\LBFactory; |
| 44 | use Wikimedia\RequestTimeout\TimeoutException; |
| 45 | use WikiPage; |
| 46 | |
| 47 | /** |
| 48 | * Backend logic for performing a page delete action. |
| 49 | * |
| 50 | * @since 1.37 |
| 51 | */ |
| 52 | class DeletePage { |
| 53 | /** |
| 54 | * @internal For use by PageCommandFactory |
| 55 | */ |
| 56 | public const CONSTRUCTOR_OPTIONS = [ |
| 57 | MainConfigNames::DeleteRevisionsBatchSize, |
| 58 | MainConfigNames::DeleteRevisionsLimit, |
| 59 | ]; |
| 60 | |
| 61 | /** |
| 62 | * Constants used for the return value of getSuccessfulDeletionsIDs() and deletionsWereScheduled() |
| 63 | */ |
| 64 | public const PAGE_BASE = 'base'; |
| 65 | public const PAGE_TALK = 'talk'; |
| 66 | |
| 67 | /** @var HookRunner */ |
| 68 | private $hookRunner; |
| 69 | /** @var RevisionStore */ |
| 70 | private $revisionStore; |
| 71 | /** @var LBFactory */ |
| 72 | private $lbFactory; |
| 73 | /** @var JobQueueGroup */ |
| 74 | private $jobQueueGroup; |
| 75 | /** @var CommentStore */ |
| 76 | private $commentStore; |
| 77 | /** @var ServiceOptions */ |
| 78 | private $options; |
| 79 | /** @var BagOStuff */ |
| 80 | private $recentDeletesCache; |
| 81 | /** @var string */ |
| 82 | private $localWikiID; |
| 83 | /** @var string */ |
| 84 | private $webRequestID; |
| 85 | /** @var UserFactory */ |
| 86 | private $userFactory; |
| 87 | /** @var BacklinkCacheFactory */ |
| 88 | private $backlinkCacheFactory; |
| 89 | /** @var WikiPageFactory */ |
| 90 | private $wikiPageFactory; |
| 91 | /** @var NamespaceInfo */ |
| 92 | private $namespaceInfo; |
| 93 | /** @var ITextFormatter */ |
| 94 | private $contLangMsgTextFormatter; |
| 95 | |
| 96 | /** @var bool */ |
| 97 | private $isDeletePageUnitTest = false; |
| 98 | |
| 99 | /** @var WikiPage */ |
| 100 | private $page; |
| 101 | /** @var Authority */ |
| 102 | private $deleter; |
| 103 | |
| 104 | /** @var bool */ |
| 105 | private $suppress = false; |
| 106 | /** @var string[] */ |
| 107 | private $tags = []; |
| 108 | /** @var string */ |
| 109 | private $logSubtype = 'delete'; |
| 110 | /** @var bool */ |
| 111 | private $forceImmediate = false; |
| 112 | /** @var WikiPage|null If not null, it means that we have to delete it. */ |
| 113 | private $associatedTalk; |
| 114 | |
| 115 | /** @var string|array */ |
| 116 | private $legacyHookErrors = ''; |
| 117 | /** @var bool */ |
| 118 | private $mergeLegacyHookErrors = true; |
| 119 | |
| 120 | /** |
| 121 | * @var array<int|null>|null Keys are the self::PAGE_* constants. Values are null if the deletion couldn't happen |
| 122 | * (e.g. due to lacking perms) or was scheduled. PAGE_TALK is only set when deleting the associated talk. |
| 123 | */ |
| 124 | private $successfulDeletionsIDs; |
| 125 | /** |
| 126 | * @var array<bool|null>|null Keys are the self::PAGE_* constants. Values are null if the deletion couldn't happen |
| 127 | * (e.g. due to lacking perms). PAGE_TALK is only set when deleting the associated talk. |
| 128 | */ |
| 129 | private $wasScheduled; |
| 130 | /** @var bool Whether a deletion was attempted */ |
| 131 | private $attemptedDeletion = false; |
| 132 | |
| 133 | /** |
| 134 | * @internal Create via the PageDeleteFactory service. |
| 135 | * @param HookContainer $hookContainer |
| 136 | * @param RevisionStore $revisionStore |
| 137 | * @param LBFactory $lbFactory |
| 138 | * @param JobQueueGroup $jobQueueGroup |
| 139 | * @param CommentStore $commentStore |
| 140 | * @param ServiceOptions $serviceOptions |
| 141 | * @param BagOStuff $recentDeletesCache |
| 142 | * @param string $localWikiID |
| 143 | * @param string $webRequestID |
| 144 | * @param WikiPageFactory $wikiPageFactory |
| 145 | * @param UserFactory $userFactory |
| 146 | * @param BacklinkCacheFactory $backlinkCacheFactory |
| 147 | * @param NamespaceInfo $namespaceInfo |
| 148 | * @param ITextFormatter $contLangMsgTextFormatter |
| 149 | * @param ProperPageIdentity $page |
| 150 | * @param Authority $deleter |
| 151 | */ |
| 152 | public function __construct( |
| 153 | HookContainer $hookContainer, |
| 154 | RevisionStore $revisionStore, |
| 155 | LBFactory $lbFactory, |
| 156 | JobQueueGroup $jobQueueGroup, |
| 157 | CommentStore $commentStore, |
| 158 | ServiceOptions $serviceOptions, |
| 159 | BagOStuff $recentDeletesCache, |
| 160 | string $localWikiID, |
| 161 | string $webRequestID, |
| 162 | WikiPageFactory $wikiPageFactory, |
| 163 | UserFactory $userFactory, |
| 164 | BacklinkCacheFactory $backlinkCacheFactory, |
| 165 | NamespaceInfo $namespaceInfo, |
| 166 | ITextFormatter $contLangMsgTextFormatter, |
| 167 | ProperPageIdentity $page, |
| 168 | Authority $deleter |
| 169 | ) { |
| 170 | $this->hookRunner = new HookRunner( $hookContainer ); |
| 171 | $this->revisionStore = $revisionStore; |
| 172 | $this->lbFactory = $lbFactory; |
| 173 | $this->jobQueueGroup = $jobQueueGroup; |
| 174 | $this->commentStore = $commentStore; |
| 175 | $serviceOptions->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); |
| 176 | $this->options = $serviceOptions; |
| 177 | $this->recentDeletesCache = $recentDeletesCache; |
| 178 | $this->localWikiID = $localWikiID; |
| 179 | $this->webRequestID = $webRequestID; |
| 180 | $this->wikiPageFactory = $wikiPageFactory; |
| 181 | $this->userFactory = $userFactory; |
| 182 | $this->backlinkCacheFactory = $backlinkCacheFactory; |
| 183 | $this->namespaceInfo = $namespaceInfo; |
| 184 | $this->contLangMsgTextFormatter = $contLangMsgTextFormatter; |
| 185 | |
| 186 | $this->page = $wikiPageFactory->newFromTitle( $page ); |
| 187 | $this->deleter = $deleter; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * @internal BC method for use by WikiPage::doDeleteArticleReal only. |
| 192 | * @return array|string |
| 193 | */ |
| 194 | public function getLegacyHookErrors() { |
| 195 | return $this->legacyHookErrors; |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * @internal BC method for use by WikiPage::doDeleteArticleReal only. |
| 200 | * @return self |
| 201 | */ |
| 202 | public function keepLegacyHookErrorsSeparate(): self { |
| 203 | $this->mergeLegacyHookErrors = false; |
| 204 | return $this; |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * If true, suppress all revisions and log the deletion in the suppression log instead of |
| 209 | * the deletion log. |
| 210 | * |
| 211 | * @param bool $suppress |
| 212 | * @return self For chaining |
| 213 | */ |
| 214 | public function setSuppress( bool $suppress ): self { |
| 215 | $this->suppress = $suppress; |
| 216 | return $this; |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * Change tags to apply to the deletion action |
| 221 | * |
| 222 | * @param string[] $tags |
| 223 | * @return self For chaining |
| 224 | */ |
| 225 | public function setTags( array $tags ): self { |
| 226 | $this->tags = $tags; |
| 227 | return $this; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Set a specific log subtype for the deletion log entry. |
| 232 | * |
| 233 | * @param string $logSubtype |
| 234 | * @return self For chaining |
| 235 | */ |
| 236 | public function setLogSubtype( string $logSubtype ): self { |
| 237 | $this->logSubtype = $logSubtype; |
| 238 | return $this; |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * If false, allows deleting over time via the job queue |
| 243 | * |
| 244 | * @param bool $forceImmediate |
| 245 | * @return self For chaining |
| 246 | */ |
| 247 | public function forceImmediate( bool $forceImmediate ): self { |
| 248 | $this->forceImmediate = $forceImmediate; |
| 249 | return $this; |
| 250 | } |
| 251 | |
| 252 | /** |
| 253 | * Tests whether it's probably possible to delete the associated talk page. This checks the replica, |
| 254 | * so it may not see the latest master change, and is useful e.g. for building the UI. |
| 255 | * |
| 256 | * @return StatusValue |
| 257 | */ |
| 258 | public function canProbablyDeleteAssociatedTalk(): StatusValue { |
| 259 | if ( $this->namespaceInfo->isTalk( $this->page->getNamespace() ) ) { |
| 260 | return StatusValue::newFatal( 'delete-error-associated-alreadytalk' ); |
| 261 | } |
| 262 | // FIXME NamespaceInfo should work with PageIdentity |
| 263 | $talkPage = $this->wikiPageFactory->newFromLinkTarget( |
| 264 | $this->namespaceInfo->getTalkPage( $this->page->getTitle() ) |
| 265 | ); |
| 266 | if ( !$talkPage->exists() ) { |
| 267 | return StatusValue::newFatal( 'delete-error-associated-doesnotexist' ); |
| 268 | } |
| 269 | return StatusValue::newGood(); |
| 270 | } |
| 271 | |
| 272 | /** |
| 273 | * If set to true and the page has a talk page, delete that one too. Callers should call |
| 274 | * canProbablyDeleteAssociatedTalk first to make sure this is a valid operation. Note that the checks |
| 275 | * here are laxer than those in canProbablyDeleteAssociatedTalk. In particular, this doesn't check |
| 276 | * whether the page exists as that may be subject to race condition, and it's checked later on (in deleteInternal, |
| 277 | * using latest data) anyway. |
| 278 | * |
| 279 | * @param bool $delete |
| 280 | * @return self For chaining |
| 281 | * @throws BadMethodCallException If $delete is true and the given page is not a talk page. |
| 282 | */ |
| 283 | public function setDeleteAssociatedTalk( bool $delete ): self { |
| 284 | if ( !$delete ) { |
| 285 | $this->associatedTalk = null; |
| 286 | return $this; |
| 287 | } |
| 288 | |
| 289 | if ( $this->namespaceInfo->isTalk( $this->page->getNamespace() ) ) { |
| 290 | throw new BadMethodCallException( "Cannot delete associated talk page of a talk page! ($this->page)" ); |
| 291 | } |
| 292 | // FIXME NamespaceInfo should work with PageIdentity |
| 293 | $this->associatedTalk = $this->wikiPageFactory->newFromLinkTarget( |
| 294 | $this->namespaceInfo->getTalkPage( $this->page->getTitle() ) |
| 295 | ); |
| 296 | return $this; |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * @internal FIXME: Hack used when running the DeletePage unit test to disable some legacy code. |
| 301 | * @codeCoverageIgnore |
| 302 | * @param bool $test |
| 303 | */ |
| 304 | public function setIsDeletePageUnitTest( bool $test ): void { |
| 305 | if ( !defined( 'MW_PHPUNIT_TEST' ) ) { |
| 306 | throw new LogicException( __METHOD__ . ' can only be used in tests!' ); |
| 307 | } |
| 308 | $this->isDeletePageUnitTest = $test; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * Called before attempting a deletion, allows the result getters to be used |
| 313 | * @internal The only external caller allowed is DeletePageJob. |
| 314 | * @return self |
| 315 | */ |
| 316 | public function setDeletionAttempted(): self { |
| 317 | $this->attemptedDeletion = true; |
| 318 | $this->successfulDeletionsIDs = [ self::PAGE_BASE => null ]; |
| 319 | $this->wasScheduled = [ self::PAGE_BASE => null ]; |
| 320 | if ( $this->associatedTalk ) { |
| 321 | $this->successfulDeletionsIDs[self::PAGE_TALK] = null; |
| 322 | $this->wasScheduled[self::PAGE_TALK] = null; |
| 323 | } |
| 324 | return $this; |
| 325 | } |
| 326 | |
| 327 | /** |
| 328 | * Asserts that a deletion operation was attempted |
| 329 | * @throws BadMethodCallException |
| 330 | */ |
| 331 | private function assertDeletionAttempted(): void { |
| 332 | if ( !$this->attemptedDeletion ) { |
| 333 | throw new BadMethodCallException( 'No deletion was attempted' ); |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | /** |
| 338 | * @return int[] Array of log IDs of successful deletions |
| 339 | * @throws BadMethodCallException If no deletions were attempted |
| 340 | */ |
| 341 | public function getSuccessfulDeletionsIDs(): array { |
| 342 | $this->assertDeletionAttempted(); |
| 343 | return $this->successfulDeletionsIDs; |
| 344 | } |
| 345 | |
| 346 | /** |
| 347 | * @return bool[] Whether the deletions were scheduled |
| 348 | * @throws BadMethodCallException If no deletions were attempted |
| 349 | */ |
| 350 | public function deletionsWereScheduled(): array { |
| 351 | $this->assertDeletionAttempted(); |
| 352 | return $this->wasScheduled; |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * Same as deleteUnsafe, but checks permissions. |
| 357 | * |
| 358 | * @param string $reason |
| 359 | * @return StatusValue |
| 360 | */ |
| 361 | public function deleteIfAllowed( string $reason ): StatusValue { |
| 362 | $this->setDeletionAttempted(); |
| 363 | $status = $this->authorizeDeletion(); |
| 364 | if ( !$status->isGood() ) { |
| 365 | return $status; |
| 366 | } |
| 367 | |
| 368 | return $this->deleteUnsafe( $reason ); |
| 369 | } |
| 370 | |
| 371 | /** |
| 372 | * @return PermissionStatus |
| 373 | */ |
| 374 | private function authorizeDeletion(): PermissionStatus { |
| 375 | $status = PermissionStatus::newEmpty(); |
| 376 | $this->deleter->authorizeWrite( 'delete', $this->page, $status ); |
| 377 | if ( $this->associatedTalk ) { |
| 378 | $this->deleter->authorizeWrite( 'delete', $this->associatedTalk, $status ); |
| 379 | } |
| 380 | if ( !$this->deleter->isAllowed( 'bigdelete' ) && $this->isBigDeletion() ) { |
| 381 | $status->fatal( |
| 382 | 'delete-toomanyrevisions', |
| 383 | Message::numParam( $this->options->get( MainConfigNames::DeleteRevisionsLimit ) ) |
| 384 | ); |
| 385 | } |
| 386 | if ( $this->tags ) { |
| 387 | $status->merge( ChangeTags::canAddTagsAccompanyingChange( $this->tags, $this->deleter ) ); |
| 388 | } |
| 389 | return $status; |
| 390 | } |
| 391 | |
| 392 | /** |
| 393 | * @return bool |
| 394 | */ |
| 395 | private function isBigDeletion(): bool { |
| 396 | $revLimit = $this->options->get( MainConfigNames::DeleteRevisionsLimit ); |
| 397 | if ( !$revLimit ) { |
| 398 | return false; |
| 399 | } |
| 400 | |
| 401 | $dbr = $this->lbFactory->getReplicaDatabase(); |
| 402 | $revCount = $this->revisionStore->countRevisionsByPageId( $dbr, $this->page->getId() ); |
| 403 | if ( $this->associatedTalk ) { |
| 404 | $revCount += $this->revisionStore->countRevisionsByPageId( $dbr, $this->associatedTalk->getId() ); |
| 405 | } |
| 406 | |
| 407 | return $revCount > $revLimit; |
| 408 | } |
| 409 | |
| 410 | /** |
| 411 | * Determines if this deletion would be batched (executed over time by the job queue) |
| 412 | * or not (completed in the same request as the delete call). |
| 413 | * |
| 414 | * It is unlikely but possible that an edit from another request could push the page over the |
| 415 | * batching threshold after this function is called, but before the caller acts upon the |
| 416 | * return value. Callers must decide for themselves how to deal with this. $safetyMargin |
| 417 | * is provided as an unreliable but situationally useful help for some common cases. |
| 418 | * |
| 419 | * @param int $safetyMargin Added to the revision count when checking for batching |
| 420 | * @return bool True if deletion would be batched, false otherwise |
| 421 | */ |
| 422 | public function isBatchedDelete( int $safetyMargin = 0 ): bool { |
| 423 | $dbr = $this->lbFactory->getReplicaDatabase(); |
| 424 | $revCount = $this->revisionStore->countRevisionsByPageId( $dbr, $this->page->getId() ); |
| 425 | $revCount += $safetyMargin; |
| 426 | |
| 427 | if ( $revCount >= $this->options->get( MainConfigNames::DeleteRevisionsBatchSize ) ) { |
| 428 | return true; |
| 429 | } elseif ( !$this->associatedTalk ) { |
| 430 | return false; |
| 431 | } |
| 432 | |
| 433 | $talkRevCount = $this->revisionStore->countRevisionsByPageId( $dbr, $this->associatedTalk->getId() ); |
| 434 | $talkRevCount += $safetyMargin; |
| 435 | |
| 436 | return $talkRevCount >= $this->options->get( MainConfigNames::DeleteRevisionsBatchSize ); |
| 437 | } |
| 438 | |
| 439 | /** |
| 440 | * Back-end article deletion: deletes the article with database consistency, writes logs, purges caches. |
| 441 | * @note This method doesn't check user permissions. Use deleteIfAllowed for that. |
| 442 | * |
| 443 | * @param string $reason Delete reason for deletion log |
| 444 | * @return Status Status object: |
| 445 | * - If successful (or scheduled), a good Status |
| 446 | * - If a page couldn't be deleted because it wasn't found, a Status with a non-fatal 'cannotdelete' error. |
| 447 | * - A fatal Status otherwise. |
| 448 | */ |
| 449 | public function deleteUnsafe( string $reason ): Status { |
| 450 | $this->setDeletionAttempted(); |
| 451 | $origReason = $reason; |
| 452 | $hookStatus = $this->runPreDeleteHooks( $this->page, $reason ); |
| 453 | if ( !$hookStatus->isGood() ) { |
| 454 | return $hookStatus; |
| 455 | } |
| 456 | if ( $this->associatedTalk ) { |
| 457 | $talkReason = $this->contLangMsgTextFormatter->format( |
| 458 | MessageValue::new( 'delete-talk-summary-prefix' )->plaintextParams( $origReason ) |
| 459 | ); |
| 460 | $talkHookStatus = $this->runPreDeleteHooks( $this->associatedTalk, $talkReason ); |
| 461 | if ( !$talkHookStatus->isGood() ) { |
| 462 | return $talkHookStatus; |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | $status = $this->deleteInternal( $this->page, self::PAGE_BASE, $reason ); |
| 467 | if ( !$this->associatedTalk || !$status->isGood() ) { |
| 468 | return $status; |
| 469 | } |
| 470 | // NOTE: If the page deletion above failed because the page is no longer there (e.g. race condition) we'll |
| 471 | // still try to delete the talk page, since it was the user's intention anyway. |
| 472 | // @phan-suppress-next-next-line PhanPossiblyUndeclaredVariable talkReason is set when used |
| 473 | // @phan-suppress-next-line PhanTypeMismatchArgumentNullable talkReason is set when used |
| 474 | $status->merge( $this->deleteInternal( $this->associatedTalk, self::PAGE_TALK, $talkReason ) ); |
| 475 | return $status; |
| 476 | } |
| 477 | |
| 478 | /** |
| 479 | * @param WikiPage $page |
| 480 | * @param string &$reason |
| 481 | * @return Status |
| 482 | */ |
| 483 | private function runPreDeleteHooks( WikiPage $page, string &$reason ): Status { |
| 484 | $status = Status::newGood(); |
| 485 | |
| 486 | $legacyDeleter = $this->userFactory->newFromAuthority( $this->deleter ); |
| 487 | if ( !$this->hookRunner->onArticleDelete( |
| 488 | $page, $legacyDeleter, $reason, $this->legacyHookErrors, $status, $this->suppress ) |
| 489 | ) { |
| 490 | if ( $this->mergeLegacyHookErrors && $this->legacyHookErrors !== '' ) { |
| 491 | if ( is_string( $this->legacyHookErrors ) ) { |
| 492 | $this->legacyHookErrors = [ $this->legacyHookErrors ]; |
| 493 | } |
| 494 | foreach ( $this->legacyHookErrors as $legacyError ) { |
| 495 | $status->fatal( new RawMessage( $legacyError ) ); |
| 496 | } |
| 497 | } |
| 498 | if ( $status->isOK() ) { |
| 499 | // Hook aborted but didn't set a fatal status |
| 500 | $status->fatal( 'delete-hook-aborted' ); |
| 501 | } |
| 502 | return $status; |
| 503 | } |
| 504 | |
| 505 | // Use a new Status in case a hook handler put something here without aborting. |
| 506 | $status = Status::newGood(); |
| 507 | $hookRes = $this->hookRunner->onPageDelete( $page, $this->deleter, $reason, $status, $this->suppress ); |
| 508 | if ( !$hookRes && !$status->isGood() ) { |
| 509 | // Note: as per the PageDeleteHook documentation, `return false` is ignored if $status is good. |
| 510 | return $status; |
| 511 | } |
| 512 | return Status::newGood(); |
| 513 | } |
| 514 | |
| 515 | /** |
| 516 | * @internal The only external caller allowed is DeletePageJob. |
| 517 | * Back-end article deletion |
| 518 | * |
| 519 | * Only invokes batching via the job queue if necessary per DeleteRevisionsBatchSize. |
| 520 | * Deletions can often be completed inline without involving the job queue. |
| 521 | * |
| 522 | * Potentially called many times per deletion operation for pages with many revisions. |
| 523 | * @param WikiPage $page |
| 524 | * @param string $pageRole |
| 525 | * @param string $reason |
| 526 | * @param string|null $webRequestId |
| 527 | * @return Status |
| 528 | */ |
| 529 | public function deleteInternal( |
| 530 | WikiPage $page, |
| 531 | string $pageRole, |
| 532 | string $reason, |
| 533 | ?string $webRequestId = null |
| 534 | ): Status { |
| 535 | $title = $page->getTitle(); |
| 536 | $status = Status::newGood(); |
| 537 | |
| 538 | $dbw = $this->lbFactory->getPrimaryDatabase(); |
| 539 | $dbw->startAtomic( __METHOD__ ); |
| 540 | |
| 541 | $page->loadPageData( IDBAccessObject::READ_LATEST ); |
| 542 | $id = $page->getId(); |
| 543 | // T98706: lock the page from various other updates but avoid using |
| 544 | // IDBAccessObject::READ_LOCKING as that will carry over the FOR UPDATE to |
| 545 | // the revisions queries (which also JOIN on user). Only lock the page |
| 546 | // row and CAS check on page_latest to see if the trx snapshot matches. |
| 547 | $lockedLatest = $page->lockAndGetLatest(); |
| 548 | if ( $id === 0 || $page->getLatest() !== $lockedLatest ) { |
| 549 | $dbw->endAtomic( __METHOD__ ); |
| 550 | // Page not there or trx snapshot is stale |
| 551 | $status->error( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ); |
| 552 | return $status; |
| 553 | } |
| 554 | |
| 555 | // At this point we are now committed to returning an OK |
| 556 | // status unless some DB query error or other exception comes up. |
| 557 | // This way callers don't have to call rollback() if $status is bad |
| 558 | // unless they actually try to catch exceptions (which is rare). |
| 559 | |
| 560 | // we need to remember the old content so we can use it to generate all deletion updates. |
| 561 | $revisionRecord = $page->getRevisionRecord(); |
| 562 | if ( !$revisionRecord ) { |
| 563 | throw new LogicException( "No revisions for $page?" ); |
| 564 | } |
| 565 | try { |
| 566 | $content = $page->getContent( RevisionRecord::RAW ); |
| 567 | } catch ( TimeoutException $e ) { |
| 568 | throw $e; |
| 569 | } catch ( Exception $ex ) { |
| 570 | wfLogWarning( __METHOD__ . ': failed to load content during deletion! ' |
| 571 | . $ex->getMessage() ); |
| 572 | |
| 573 | $content = null; |
| 574 | } |
| 575 | |
| 576 | // Archive revisions. In immediate mode, archive all revisions. Otherwise, archive |
| 577 | // one batch of revisions and defer archival of any others to the job queue. |
| 578 | $explictTrxLogged = false; |
| 579 | while ( true ) { |
| 580 | $done = $this->archiveRevisions( $page, $id ); |
| 581 | if ( $done || !$this->forceImmediate ) { |
| 582 | break; |
| 583 | } |
| 584 | $dbw->endAtomic( __METHOD__ ); |
| 585 | if ( $dbw->explicitTrxActive() ) { |
| 586 | // Explicit transactions may never happen here in practice. Log to be sure. |
| 587 | if ( !$explictTrxLogged ) { |
| 588 | $explictTrxLogged = true; |
| 589 | LoggerFactory::getInstance( 'wfDebug' )->debug( |
| 590 | 'explicit transaction active in ' . __METHOD__ . ' while deleting {title}', [ |
| 591 | 'title' => $title->getText(), |
| 592 | ] ); |
| 593 | } |
| 594 | continue; |
| 595 | } |
| 596 | if ( $dbw->trxLevel() ) { |
| 597 | $dbw->commit( __METHOD__ ); |
| 598 | } |
| 599 | $this->lbFactory->waitForReplication(); |
| 600 | $dbw->startAtomic( __METHOD__ ); |
| 601 | } |
| 602 | |
| 603 | if ( !$done ) { |
| 604 | $dbw->endAtomic( __METHOD__ ); |
| 605 | |
| 606 | $jobParams = [ |
| 607 | 'namespace' => $title->getNamespace(), |
| 608 | 'title' => $title->getDBkey(), |
| 609 | 'wikiPageId' => $id, |
| 610 | 'requestId' => $webRequestId ?? $this->webRequestID, |
| 611 | 'reason' => $reason, |
| 612 | 'suppress' => $this->suppress, |
| 613 | 'userId' => $this->deleter->getUser()->getId(), |
| 614 | 'tags' => json_encode( $this->tags ), |
| 615 | 'logsubtype' => $this->logSubtype, |
| 616 | 'pageRole' => $pageRole, |
| 617 | ]; |
| 618 | |
| 619 | $job = new DeletePageJob( $jobParams ); |
| 620 | $this->jobQueueGroup->push( $job ); |
| 621 | $this->wasScheduled[$pageRole] = true; |
| 622 | return $status; |
| 623 | } |
| 624 | $this->wasScheduled[$pageRole] = false; |
| 625 | |
| 626 | // Get archivedRevisionCount by db query, because there's no better alternative. |
| 627 | // Jobs cannot pass a count of archived revisions to the next job, because additional |
| 628 | // deletion operations can be started while the first is running. Jobs from each |
| 629 | // gracefully interleave, but would not know about each other's count. Deduplication |
| 630 | // in the job queue to avoid simultaneous deletion operations would add overhead. |
| 631 | // Number of archived revisions cannot be known beforehand, because edits can be made |
| 632 | // while deletion operations are being processed, changing the number of archivals. |
| 633 | $archivedRevisionCount = $dbw->newSelectQueryBuilder() |
| 634 | ->select( '*' ) |
| 635 | ->from( 'archive' ) |
| 636 | ->where( [ |
| 637 | 'ar_namespace' => $title->getNamespace(), |
| 638 | 'ar_title' => $title->getDBkey(), |
| 639 | 'ar_page_id' => $id |
| 640 | ] ) |
| 641 | ->caller( __METHOD__ )->fetchRowCount(); |
| 642 | |
| 643 | // Look up the redirect target before deleting the page to avoid inconsistent state (T348881). |
| 644 | // The cloning business below is specifically to allow hook handlers to check the redirect |
| 645 | // status before the deletion (see I715046dc8157047aff4d5bd03ea6b5a47aee58bb). |
| 646 | $page->getRedirectTarget(); |
| 647 | // Clone the title and wikiPage, so we have the information we need when |
| 648 | // we log and run the ArticleDeleteComplete hook. |
| 649 | $logTitle = clone $title; |
| 650 | $wikiPageBeforeDelete = clone $page; |
| 651 | |
| 652 | // Now that it's safely backed up, delete it |
| 653 | $dbw->newDeleteQueryBuilder() |
| 654 | ->deleteFrom( 'page' ) |
| 655 | ->where( [ 'page_id' => $id ] ) |
| 656 | ->caller( __METHOD__ )->execute(); |
| 657 | |
| 658 | // Log the deletion, if the page was suppressed, put it in the suppression log instead |
| 659 | $logtype = $this->suppress ? 'suppress' : 'delete'; |
| 660 | |
| 661 | $logEntry = new ManualLogEntry( $logtype, $this->logSubtype ); |
| 662 | $logEntry->setPerformer( $this->deleter->getUser() ); |
| 663 | $logEntry->setTarget( $logTitle ); |
| 664 | $logEntry->setComment( $reason ); |
| 665 | $logEntry->addTags( $this->tags ); |
| 666 | if ( !$this->isDeletePageUnitTest ) { |
| 667 | // TODO: Remove conditional once ManualLogEntry is servicified (T253717) |
| 668 | $logid = $logEntry->insert(); |
| 669 | |
| 670 | $dbw->onTransactionPreCommitOrIdle( |
| 671 | static function () use ( $logEntry, $logid ) { |
| 672 | // T58776: avoid deadlocks (especially from FileDeleteForm) |
| 673 | $logEntry->publish( $logid ); |
| 674 | }, |
| 675 | __METHOD__ |
| 676 | ); |
| 677 | } else { |
| 678 | $logid = 42; |
| 679 | } |
| 680 | |
| 681 | $dbw->endAtomic( __METHOD__ ); |
| 682 | |
| 683 | $this->doDeleteUpdates( $page, $revisionRecord ); |
| 684 | |
| 685 | $legacyDeleter = $this->userFactory->newFromAuthority( $this->deleter ); |
| 686 | $this->hookRunner->onArticleDeleteComplete( |
| 687 | $wikiPageBeforeDelete, |
| 688 | $legacyDeleter, |
| 689 | $reason, |
| 690 | $id, |
| 691 | $content, |
| 692 | $logEntry, |
| 693 | $archivedRevisionCount |
| 694 | ); |
| 695 | $this->hookRunner->onPageDeleteComplete( |
| 696 | $wikiPageBeforeDelete, |
| 697 | $this->deleter, |
| 698 | $reason, |
| 699 | $id, |
| 700 | $revisionRecord, |
| 701 | $logEntry, |
| 702 | $archivedRevisionCount |
| 703 | ); |
| 704 | $this->successfulDeletionsIDs[$pageRole] = $logid; |
| 705 | |
| 706 | // Show log excerpt on 404 pages rather than just a link |
| 707 | $key = $this->recentDeletesCache->makeKey( 'page-recent-delete', md5( $logTitle->getPrefixedText() ) ); |
| 708 | $this->recentDeletesCache->set( $key, 1, BagOStuff::TTL_DAY ); |
| 709 | |
| 710 | return $status; |
| 711 | } |
| 712 | |
| 713 | /** |
| 714 | * Archives revisions as part of page deletion. |
| 715 | * |
| 716 | * @param WikiPage $page |
| 717 | * @param int $id |
| 718 | * @return bool |
| 719 | */ |
| 720 | private function archiveRevisions( WikiPage $page, int $id ): bool { |
| 721 | // Given the lock above, we can be confident in the title and page ID values |
| 722 | $namespace = $page->getTitle()->getNamespace(); |
| 723 | $dbKey = $page->getTitle()->getDBkey(); |
| 724 | |
| 725 | $dbw = $this->lbFactory->getPrimaryDatabase(); |
| 726 | |
| 727 | $revQuery = $this->revisionStore->getQueryInfo(); |
| 728 | $bitfield = false; |
| 729 | |
| 730 | // Bitfields to further suppress the content |
| 731 | if ( $this->suppress ) { |
| 732 | $bitfield = RevisionRecord::SUPPRESSED_ALL; |
| 733 | $revQuery['fields'] = array_diff( $revQuery['fields'], [ 'rev_deleted' ] ); |
| 734 | } |
| 735 | |
| 736 | // For now, shunt the revision data into the archive table. |
| 737 | // Text is *not* removed from the text table; bulk storage |
| 738 | // is left intact to avoid breaking block-compression or |
| 739 | // immutable storage schemes. |
| 740 | // In the future, we may keep revisions and mark them with |
| 741 | // the rev_deleted field, which is reserved for this purpose. |
| 742 | |
| 743 | // Lock rows in `revision` and its temp tables, but not any others. |
| 744 | // Note array_intersect() preserves keys from the first arg, and we're |
| 745 | // assuming $revQuery has `revision` primary and isn't using subtables |
| 746 | // for anything we care about. |
| 747 | $lockQuery = $revQuery; |
| 748 | $lockQuery['tables'] = array_intersect( |
| 749 | $revQuery['tables'], |
| 750 | [ 'revision', 'revision_comment_temp' ] |
| 751 | ); |
| 752 | unset( $lockQuery['fields'] ); |
| 753 | $dbw->newSelectQueryBuilder() |
| 754 | ->queryInfo( $lockQuery ) |
| 755 | ->where( [ 'rev_page' => $id ] ) |
| 756 | ->forUpdate() |
| 757 | ->caller( __METHOD__ ) |
| 758 | ->acquireRowLocks(); |
| 759 | |
| 760 | $deleteBatchSize = $this->options->get( MainConfigNames::DeleteRevisionsBatchSize ); |
| 761 | // Get as many of the page revisions as we are allowed to. The +1 lets us recognize the |
| 762 | // unusual case where there were exactly $deleteBatchSize revisions remaining. |
| 763 | $res = $dbw->select( |
| 764 | $revQuery['tables'], |
| 765 | $revQuery['fields'], |
| 766 | [ 'rev_page' => $id ], |
| 767 | __METHOD__, |
| 768 | [ 'ORDER BY' => 'rev_timestamp ASC, rev_id ASC', 'LIMIT' => $deleteBatchSize + 1 ], |
| 769 | $revQuery['joins'] |
| 770 | ); |
| 771 | |
| 772 | // Build their equivalent archive rows |
| 773 | $rowsInsert = []; |
| 774 | $revids = []; |
| 775 | |
| 776 | /** @var int[] $ipRevIds Revision IDs of edits that were made by IPs */ |
| 777 | $ipRevIds = []; |
| 778 | |
| 779 | $done = true; |
| 780 | foreach ( $res as $row ) { |
| 781 | if ( count( $revids ) >= $deleteBatchSize ) { |
| 782 | $done = false; |
| 783 | break; |
| 784 | } |
| 785 | |
| 786 | $comment = $this->commentStore->getComment( 'rev_comment', $row ); |
| 787 | $rowInsert = [ |
| 788 | 'ar_namespace' => $namespace, |
| 789 | 'ar_title' => $dbKey, |
| 790 | 'ar_actor' => $row->rev_actor, |
| 791 | 'ar_timestamp' => $row->rev_timestamp, |
| 792 | 'ar_minor_edit' => $row->rev_minor_edit, |
| 793 | 'ar_rev_id' => $row->rev_id, |
| 794 | 'ar_parent_id' => $row->rev_parent_id, |
| 795 | 'ar_len' => $row->rev_len, |
| 796 | 'ar_page_id' => $id, |
| 797 | 'ar_deleted' => $this->suppress ? $bitfield : $row->rev_deleted, |
| 798 | 'ar_sha1' => $row->rev_sha1, |
| 799 | ] + $this->commentStore->insert( $dbw, 'ar_comment', $comment ); |
| 800 | |
| 801 | $rowsInsert[] = $rowInsert; |
| 802 | $revids[] = $row->rev_id; |
| 803 | |
| 804 | // Keep track of IP edits, so that the corresponding rows can |
| 805 | // be deleted in the ip_changes table. |
| 806 | if ( (int)$row->rev_user === 0 && IPUtils::isValid( $row->rev_user_text ) ) { |
| 807 | $ipRevIds[] = $row->rev_id; |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | if ( count( $revids ) > 0 ) { |
| 812 | // Copy them into the archive table |
| 813 | $dbw->newInsertQueryBuilder() |
| 814 | ->insertInto( 'archive' ) |
| 815 | ->rows( $rowsInsert ) |
| 816 | ->caller( __METHOD__ )->execute(); |
| 817 | |
| 818 | $dbw->newDeleteQueryBuilder() |
| 819 | ->deleteFrom( 'revision' ) |
| 820 | ->where( [ 'rev_id' => $revids ] ) |
| 821 | ->caller( __METHOD__ )->execute(); |
| 822 | // Also delete records from ip_changes as applicable. |
| 823 | if ( count( $ipRevIds ) > 0 ) { |
| 824 | $dbw->newDeleteQueryBuilder() |
| 825 | ->deleteFrom( 'ip_changes' ) |
| 826 | ->where( [ 'ipc_rev_id' => $ipRevIds ] ) |
| 827 | ->caller( __METHOD__ )->execute(); |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | return $done; |
| 832 | } |
| 833 | |
| 834 | /** |
| 835 | * Do some database updates after deletion |
| 836 | * |
| 837 | * @param WikiPage $page |
| 838 | * @param RevisionRecord $revRecord The current page revision at the time of |
| 839 | * deletion, used when determining the required updates. This may be needed because |
| 840 | * $page->getRevisionRecord() may already return null when the page proper was deleted. |
| 841 | */ |
| 842 | private function doDeleteUpdates( WikiPage $page, RevisionRecord $revRecord ): void { |
| 843 | try { |
| 844 | $countable = $page->isCountable(); |
| 845 | } catch ( TimeoutException $e ) { |
| 846 | throw $e; |
| 847 | } catch ( Exception $ex ) { |
| 848 | // fallback for deleting broken pages for which we cannot load the content for |
| 849 | // some reason. Note that doDeleteArticleReal() already logged this problem. |
| 850 | $countable = false; |
| 851 | } |
| 852 | |
| 853 | // Update site status |
| 854 | DeferredUpdates::addUpdate( SiteStatsUpdate::factory( |
| 855 | [ 'edits' => 1, 'articles' => $countable ? -1 : 0, 'pages' => -1 ] |
| 856 | ) ); |
| 857 | |
| 858 | // Delete pagelinks, update secondary indexes, etc |
| 859 | $updates = $this->getDeletionUpdates( $page, $revRecord ); |
| 860 | foreach ( $updates as $update ) { |
| 861 | DeferredUpdates::addUpdate( $update ); |
| 862 | } |
| 863 | |
| 864 | // Reparse any pages transcluding this page |
| 865 | LinksUpdate::queueRecursiveJobsForTable( |
| 866 | $page->getTitle(), |
| 867 | 'templatelinks', |
| 868 | 'delete-page', |
| 869 | $this->deleter->getUser()->getName(), |
| 870 | $this->backlinkCacheFactory->getBacklinkCache( $page->getTitle() ) |
| 871 | ); |
| 872 | // Reparse any pages including this image |
| 873 | if ( $page->getTitle()->getNamespace() === NS_FILE ) { |
| 874 | LinksUpdate::queueRecursiveJobsForTable( |
| 875 | $page->getTitle(), |
| 876 | 'imagelinks', |
| 877 | 'delete-page', |
| 878 | $this->deleter->getUser()->getName(), |
| 879 | $this->backlinkCacheFactory->getBacklinkCache( $page->getTitle() ) |
| 880 | ); |
| 881 | } |
| 882 | |
| 883 | if ( !$this->isDeletePageUnitTest ) { |
| 884 | // TODO Remove conditional once WikiPage::onArticleDelete is moved to a proper service |
| 885 | // Clear caches |
| 886 | WikiPage::onArticleDelete( $page->getTitle() ); |
| 887 | } |
| 888 | |
| 889 | WikiModule::invalidateModuleCache( |
| 890 | $page->getTitle(), |
| 891 | $revRecord, |
| 892 | null, |
| 893 | $this->localWikiID |
| 894 | ); |
| 895 | |
| 896 | // Reset the page object and the Title object |
| 897 | $page->loadFromRow( false, IDBAccessObject::READ_LATEST ); |
| 898 | |
| 899 | // Search engine |
| 900 | DeferredUpdates::addUpdate( new SearchUpdate( $page->getId(), $page->getTitle() ) ); |
| 901 | } |
| 902 | |
| 903 | /** |
| 904 | * Returns a list of updates to be performed when the page is deleted. The |
| 905 | * updates should remove any information about this page from secondary data |
| 906 | * stores such as links tables. |
| 907 | * |
| 908 | * @param WikiPage $page |
| 909 | * @param RevisionRecord $rev The revision being deleted. |
| 910 | * @return DeferrableUpdate[] |
| 911 | */ |
| 912 | private function getDeletionUpdates( WikiPage $page, RevisionRecord $rev ): array { |
| 913 | if ( $this->isDeletePageUnitTest ) { |
| 914 | // Hack: LinksDeletionUpdate reads from the global state in the constructor |
| 915 | return []; |
| 916 | } |
| 917 | $slotContent = array_map( static function ( SlotRecord $slot ) { |
| 918 | return $slot->getContent(); |
| 919 | }, $rev->getSlots()->getSlots() ); |
| 920 | |
| 921 | $allUpdates = [ new LinksDeletionUpdate( $page ) ]; |
| 922 | |
| 923 | // NOTE: once Content::getDeletionUpdates() is removed, we only need the content |
| 924 | // model here, not the content object! |
| 925 | // TODO: consolidate with similar logic in DerivedPageDataUpdater::getSecondaryDataUpdates() |
| 926 | /** @var ?Content $content */ |
| 927 | $content = null; // in case $slotContent is zero-length |
| 928 | foreach ( $slotContent as $role => $content ) { |
| 929 | $handler = $content->getContentHandler(); |
| 930 | |
| 931 | $updates = $handler->getDeletionUpdates( |
| 932 | $page->getTitle(), |
| 933 | $role |
| 934 | ); |
| 935 | |
| 936 | $allUpdates = array_merge( $allUpdates, $updates ); |
| 937 | } |
| 938 | |
| 939 | $this->hookRunner->onPageDeletionDataUpdates( |
| 940 | $page->getTitle(), $rev, $allUpdates ); |
| 941 | |
| 942 | // TODO: hard deprecate old hook in 1.33 |
| 943 | $this->hookRunner->onWikiPageDeletionUpdates( $page, $content, $allUpdates ); |
| 944 | return $allUpdates; |
| 945 | } |
| 946 | } |