includes/MovePage.php

   1 <?php
   2
   3 /**
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  * http://www.gnu.org/copyleft/gpl.html
  18  *
  19  * @file
  20  */
  21
  22 use MediaWiki\MediaWikiServices;
  23 use MediaWiki\Revision\SlotRecord;
  24 use Wikimedia\Rdbms\IDatabase;
  25
  26 /**
  27  * Handles the backend logic of moving a page from one title
  28  * to another.
  29  *
  30  * @since 1.24
  31  */
  32 class MovePage {
  33
  34         /**
  35          * @var Title
  36          */
  37         protected $oldTitle;
  38
  39         /**
  40          * @var Title
  41          */
  42         protected $newTitle;
  43
  44         public function __construct( Title $oldTitle, Title $newTitle ) {
  45                 $this->oldTitle = $oldTitle;
  46                 $this->newTitle = $newTitle;
  47         }
  48
  49         /**
  50          * Check if the user is allowed to perform the move.
  51          *
  52          * @param User $user
  53          * @param string|null $reason To check against summary spam regex. Set to null to skip the check,
  54          *   for instance to display errors preemptively before the user has filled in a summary.
  55          * @return Status
  56          */
  57         public function checkPermissions( User $user, $reason ) {
  58                 $status = new Status();
  59
  60                 $errors = wfMergeErrorArrays(
  61                         $this->oldTitle->getUserPermissionsErrors( 'move', $user ),
  62                         $this->oldTitle->getUserPermissionsErrors( 'edit', $user ),
  63                         $this->newTitle->getUserPermissionsErrors( 'move-target', $user ),
  64                         $this->newTitle->getUserPermissionsErrors( 'edit', $user )
  65                 );
  66
  67                 // Convert into a Status object
  68                 if ( $errors ) {
  69                         foreach ( $errors as $error ) {
  70                                 $status->fatal( ...$error );
  71                         }
  72                 }
  73
  74                 if ( $reason !== null && EditPage::matchSummarySpamRegex( $reason ) !== false ) {
  75                         // This is kind of lame, won't display nice
  76                         $status->fatal( 'spamprotectiontext' );
  77                 }
  78
  79                 $tp = $this->newTitle->getTitleProtection();
  80                 if ( $tp !== false && !$user->isAllowed( $tp['permission'] ) ) {
  81                                 $status->fatal( 'cantmove-titleprotected' );
  82                 }
  83
  84                 Hooks::run( 'MovePageCheckPermissions',
  85                         [ $this->oldTitle, $this->newTitle, $user, $reason, $status ]
  86                 );
  87
  88                 return $status;
  89         }
  90
  91         /**
  92          * Does various sanity checks that the move is
  93          * valid. Only things based on the two titles
  94          * should be checked here.
  95          *
  96          * @return Status
  97          */
  98         public function isValidMove() {
  99                 global $wgContentHandlerUseDB;
 100                 $status = new Status();
 101
 102                 if ( $this->oldTitle->equals( $this->newTitle ) ) {
 103                         $status->fatal( 'selfmove' );
 104                 }
 105                 if ( !$this->oldTitle->isMovable() ) {
 106                         $status->fatal( 'immobile-source-namespace', $this->oldTitle->getNsText() );
 107                 }
 108                 if ( $this->newTitle->isExternal() ) {
 109                         $status->fatal( 'immobile-target-namespace-iw' );
 110                 }
 111                 if ( !$this->newTitle->isMovable() ) {
 112                         $status->fatal( 'immobile-target-namespace', $this->newTitle->getNsText() );
 113                 }
 114
 115                 $oldid = $this->oldTitle->getArticleID();
 116
 117                 if ( $this->newTitle->getDBkey() === '' ) {
 118                         $status->fatal( 'articleexists' );
 119                 }
 120                 if (
 121                         ( $this->oldTitle->getDBkey() == '' ) ||
 122                         ( !$oldid ) ||
 123                         ( $this->newTitle->getDBkey() == '' )
 124                 ) {
 125                         $status->fatal( 'badarticleerror' );
 126                 }
 127
 128                 # The move is allowed only if (1) the target doesn't exist, or
 129                 # (2) the target is a redirect to the source, and has no history
 130                 # (so we can undo bad moves right after they're done).
 131                 if ( $this->newTitle->getArticleID() && !$this->isValidMoveTarget() ) {
 132                         $status->fatal( 'articleexists' );
 133                 }
 134
 135                 // Content model checks
 136                 if ( !$wgContentHandlerUseDB &&
 137                         $this->oldTitle->getContentModel() !== $this->newTitle->getContentModel() ) {
 138                         // can't move a page if that would change the page's content model
 139                         $status->fatal(
 140                                 'bad-target-model',
 141                                 ContentHandler::getLocalizedName( $this->oldTitle->getContentModel() ),
 142                                 ContentHandler::getLocalizedName( $this->newTitle->getContentModel() )
 143                         );
 144                 } elseif (
 145                         !ContentHandler::getForTitle( $this->oldTitle )->canBeUsedOn( $this->newTitle )
 146                 ) {
 147                         $status->fatal(
 148                                 'content-not-allowed-here',
 149                                 ContentHandler::getLocalizedName( $this->oldTitle->getContentModel() ),
 150                                 $this->newTitle->getPrefixedText(),
 151                                 SlotRecord::MAIN
 152                         );
 153                 }
 154
 155                 // Image-specific checks
 156                 if ( $this->oldTitle->inNamespace( NS_FILE ) ) {
 157                         $status->merge( $this->isValidFileMove() );
 158                 }
 159
 160                 if ( $this->newTitle->inNamespace( NS_FILE ) && !$this->oldTitle->inNamespace( NS_FILE ) ) {
 161                         $status->fatal( 'nonfile-cannot-move-to-file' );
 162                 }
 163
 164                 // Hook for extensions to say a title can't be moved for technical reasons
 165                 Hooks::run( 'MovePageIsValidMove', [ $this->oldTitle, $this->newTitle, $status ] );
 166
 167                 return $status;
 168         }
 169
 170         /**
 171          * Sanity checks for when a file is being moved
 172          *
 173          * @return Status
 174          */
 175         protected function isValidFileMove() {
 176                 $status = new Status();
 177                 $file = wfLocalFile( $this->oldTitle );
 178                 $file->load( File::READ_LATEST );
 179                 if ( $file->exists() ) {
 180                         if ( $this->newTitle->getText() != wfStripIllegalFilenameChars( $this->newTitle->getText() ) ) {
 181                                 $status->fatal( 'imageinvalidfilename' );
 182                         }
 183                         if ( !File::checkExtensionCompatibility( $file, $this->newTitle->getDBkey() ) ) {
 184                                 $status->fatal( 'imagetypemismatch' );
 185                         }
 186                 }
 187
 188                 if ( !$this->newTitle->inNamespace( NS_FILE ) ) {
 189                         $status->fatal( 'imagenocrossnamespace' );
 190                 }
 191
 192                 return $status;
 193         }
 194
 195         /**
 196          * Checks if $this can be moved to a given Title
 197          * - Selects for update, so don't call it unless you mean business
 198          *
 199          * @since 1.25
 200          * @return bool
 201          */
 202         protected function isValidMoveTarget() {
 203                 # Is it an existing file?
 204                 if ( $this->newTitle->inNamespace( NS_FILE ) ) {
 205                         $file = wfLocalFile( $this->newTitle );
 206                         $file->load( File::READ_LATEST );
 207                         if ( $file->exists() ) {
 208                                 wfDebug( __METHOD__ . ": file exists\n" );
 209                                 return false;
 210                         }
 211                 }
 212                 # Is it a redirect with no history?
 213                 if ( !$this->newTitle->isSingleRevRedirect() ) {
 214                         wfDebug( __METHOD__ . ": not a one-rev redirect\n" );
 215                         return false;
 216                 }
 217                 # Get the article text
 218                 $rev = Revision::newFromTitle( $this->newTitle, false, Revision::READ_LATEST );
 219                 if ( !is_object( $rev ) ) {
 220                         return false;
 221                 }
 222                 $content = $rev->getContent();
 223                 # Does the redirect point to the source?
 224                 # Or is it a broken self-redirect, usually caused by namespace collisions?
 225                 $redirTitle = $content ? $content->getRedirectTarget() : null;
 226
 227                 if ( $redirTitle ) {
 228                         if ( $redirTitle->getPrefixedDBkey() !== $this->oldTitle->getPrefixedDBkey() &&
 229                                 $redirTitle->getPrefixedDBkey() !== $this->newTitle->getPrefixedDBkey() ) {
 230                                 wfDebug( __METHOD__ . ": redirect points to other page\n" );
 231                                 return false;
 232                         } else {
 233                                 return true;
 234                         }
 235                 } else {
 236                         # Fail safe (not a redirect after all. strange.)
 237                         wfDebug( __METHOD__ . ": failsafe: database says " . $this->newTitle->getPrefixedDBkey() .
 238                                 " is a redirect, but it doesn't contain a valid redirect.\n" );
 239                         return false;
 240                 }
 241         }
 242
 243         /**
 244          * Move a page without taking user permissions into account. Only checks if the move is itself
 245          * invalid, e.g., trying to move a special page or trying to move a page onto one that already
 246          * exists.
 247          *
 248          * @param User $user
 249          * @param string|null $reason
 250          * @param bool|null $createRedirect
 251          * @param string[] $changeTags Change tags to apply to the entry in the move log
 252          * @return Status
 253          */
 254         public function move(
 255                 User $user, $reason = null, $createRedirect = true, array $changeTags = []
 256         ) {
 257                 $status = $this->isValidMove();
 258                 if ( !$status->isOK() ) {
 259                         return $status;
 260                 }
 261
 262                 return $this->moveUnsafe( $user, $reason, $createRedirect, $changeTags );
 263         }
 264
 265         /**
 266          * Same as move(), but with permissions checks.
 267          *
 268          * @param User $user
 269          * @param string|null $reason
 270          * @param bool|null $createRedirect Ignored if user doesn't have suppressredirect permission
 271          * @param string[] $changeTags Change tags to apply to the entry in the move log
 272          * @return Status
 273          */
 274         public function moveIfAllowed(
 275                 User $user, $reason = null, $createRedirect = true, array $changeTags = []
 276         ) {
 277                 $status = $this->isValidMove();
 278                 $status->merge( $this->checkPermissions( $user, $reason ) );
 279                 if ( $changeTags ) {
 280                         $status->merge( ChangeTags::canAddTagsAccompanyingChange( $changeTags, $user ) );
 281                 }
 282
 283                 if ( !$status->isOK() ) {
 284                         // Auto-block user's IP if the account was "hard" blocked
 285                         $user->spreadAnyEditBlock();
 286                         return $status;
 287                 }
 288
 289                 // Check suppressredirect permission
 290                 if ( !$user->isAllowed( 'suppressredirect' ) ) {
 291                         $createRedirect = true;
 292                 }
 293
 294                 return $this->moveUnsafe( $user, $reason, $createRedirect, $changeTags );
 295         }
 296
 297         /**
 298          * Move the source page's subpages to be subpages of the target page, without checking user
 299          * permissions. The caller is responsible for moving the source page itself. We will still not
 300          * do moves that are inherently not allowed, nor will we move more than $wgMaximumMovedPages.
 301          *
 302          * @param User $user
 303          * @param string|null $reason The reason for the move
 304          * @param bool|null $createRedirect Whether to create redirects from the old subpages to
 305          *  the new ones
 306          * @param string[] $changeTags Applied to entries in the move log and redirect page revision
 307          * @return Status Good if no errors occurred. Ok if at least one page succeeded. The "value"
 308          *  of the top-level status is an array containing the per-title status for each page. For any
 309          *  move that succeeded, the "value" of the per-title status is the new page title.
 310          */
 311         public function moveSubpages(
 312                 User $user, $reason = null, $createRedirect = true, array $changeTags = []
 313         ) {
 314                 return $this->moveSubpagesInternal( false, $user, $reason, $createRedirect, $changeTags );
 315         }
 316
 317         /**
 318          * Move the source page's subpages to be subpages of the target page, with user permission
 319          * checks. The caller is responsible for moving the source page itself.
 320          *
 321          * @param User $user
 322          * @param string|null $reason The reason for the move
 323          * @param bool|null $createRedirect Whether to create redirects from the old subpages to
 324          *  the new ones. Ignored if the user doesn't have the 'suppressredirect' right.
 325          * @param string[] $changeTags Applied to entries in the move log and redirect page revision
 326          * @return Status Good if no errors occurred. Ok if at least one page succeeded. The "value"
 327          *  of the top-level status is an array containing the per-title status for each page. For any
 328          *  move that succeeded, the "value" of the per-title status is the new page title.
 329          */
 330         public function moveSubpagesIfAllowed(
 331                 User $user, $reason = null, $createRedirect = true, array $changeTags = []
 332         ) {
 333                 return $this->moveSubpagesInternal( true, $user, $reason, $createRedirect, $changeTags );
 334         }
 335
 336         /**
 337          * @param bool $checkPermissions
 338          * @param User $user
 339          * @param string $reason
 340          * @param bool $createRedirect
 341          * @param array $changeTags
 342          * @return Status
 343          */
 344         private function moveSubpagesInternal(
 345                 $checkPermissions, User $user, $reason, $createRedirect, array $changeTags
 346         ) {
 347                 global $wgMaximumMovedPages;
 348                 $services = MediaWikiServices::getInstance();
 349
 350                 if ( $checkPermissions ) {
 351                         if ( !$services->getPermissionManager()->userCan(
 352                                 'move-subpages', $user, $this->oldTitle )
 353                         ) {
 354                                 return Status::newFatal( 'cant-move-subpages' );
 355                         }
 356                 }
 357
 358                 $nsInfo = $services->getNamespaceInfo();
 359
 360                 // Do the source and target namespaces support subpages?
 361                 if ( !$nsInfo->hasSubpages( $this->oldTitle->getNamespace() ) ) {
 362                         return Status::newFatal( 'namespace-nosubpages',
 363                                 $nsInfo->getCanonicalName( $this->oldTitle->getNamespace() ) );
 364                 }
 365                 if ( !$nsInfo->hasSubpages( $this->newTitle->getNamespace() ) ) {
 366                         return Status::newFatal( 'namespace-nosubpages',
 367                                 $nsInfo->getCanonicalName( $this->newTitle->getNamespace() ) );
 368                 }
 369
 370                 // Return a status for the overall result. Its value will be an array with per-title
 371                 // status for each subpage. Merge any errors from the per-title statuses into the
 372                 // top-level status without resetting the overall result.
 373                 $topStatus = Status::newGood();
 374                 $perTitleStatus = [];
 375                 $subpages = $this->oldTitle->getSubpages( $wgMaximumMovedPages + 1 );
 376                 $count = 0;
 377                 foreach ( $subpages as $oldSubpage ) {
 378                         $count++;
 379                         if ( $count > $wgMaximumMovedPages ) {
 380                                 $status = Status::newFatal( 'movepage-max-pages', $wgMaximumMovedPages );
 381                                 $perTitleStatus[$oldSubpage->getPrefixedText()] = $status;
 382                                 $topStatus->merge( $status );
 383                                 $topStatus->setOk( true );
 384                                 break;
 385                         }
 386
 387                         // We don't know whether this function was called before or after moving the root page,
 388                         // so check both titles
 389                         if ( $oldSubpage->getArticleID() == $this->oldTitle->getArticleID() ||
 390                                 $oldSubpage->getArticleID() == $this->newTitle->getArticleID()
 391                         ) {
 392                                 // When moving a page to a subpage of itself, don't move it twice
 393                                 continue;
 394                         }
 395                         $newPageName = preg_replace(
 396                                         '#^' . preg_quote( $this->oldTitle->getDBkey(), '#' ) . '#',
 397                                         StringUtils::escapeRegexReplacement( $this->newTitle->getDBkey() ), # T23234
 398                                         $oldSubpage->getDBkey() );
 399                         if ( $oldSubpage->isTalkPage() ) {
 400                                 $newNs = $this->newTitle->getTalkPage()->getNamespace();
 401                         } else {
 402                                 $newNs = $this->newTitle->getSubjectPage()->getNamespace();
 403                         }
 404                         // T16385: we need makeTitleSafe because the new page names may be longer than 255
 405                         // characters.
 406                         $newSubpage = Title::makeTitleSafe( $newNs, $newPageName );
 407
 408                         $mp = new MovePage( $oldSubpage, $newSubpage );
 409                         $method = $checkPermissions ? 'moveIfAllowed' : 'move';
 410                         $status = $mp->$method( $user, $reason, $createRedirect, $changeTags );
 411                         if ( $status->isOK() ) {
 412                                 $status->setResult( true, $newSubpage->getPrefixedText() );
 413                         }
 414                         $perTitleStatus[$oldSubpage->getPrefixedText()] = $status;
 415                         $topStatus->merge( $status );
 416                         $topStatus->setOk( true );
 417                 }
 418
 419                 $topStatus->value = $perTitleStatus;
 420                 return $topStatus;
 421         }
 422
 423         /**
 424          * Moves *without* any sort of safety or sanity checks. Hooks can still fail the move, however.
 425          *
 426          * @param User $user
 427          * @param string $reason
 428          * @param bool $createRedirect
 429          * @param string[] $changeTags Change tags to apply to the entry in the move log
 430          * @return Status
 431          */
 432         private function moveUnsafe( User $user, $reason, $createRedirect, array $changeTags ) {
 433                 global $wgCategoryCollation;
 434
 435                 $status = Status::newGood();
 436                 Hooks::run( 'TitleMove', [ $this->oldTitle, $this->newTitle, $user, $reason, &$status ] );
 437                 if ( !$status->isOK() ) {
 438                         // Move was aborted by the hook
 439                         return $status;
 440                 }
 441
 442                 $dbw = wfGetDB( DB_MASTER );
 443                 $dbw->startAtomic( __METHOD__, IDatabase::ATOMIC_CANCELABLE );
 444
 445                 Hooks::run( 'TitleMoveStarting', [ $this->oldTitle, $this->newTitle, $user ] );
 446
 447                 $pageid = $this->oldTitle->getArticleID( Title::GAID_FOR_UPDATE );
 448                 $protected = $this->oldTitle->isProtected();
 449
 450                 // Do the actual move; if this fails, it will throw an MWException(!)
 451                 $nullRevision = $this->moveToInternal( $user, $this->newTitle, $reason, $createRedirect,
 452                         $changeTags );
 453
 454                 // Refresh the sortkey for this row.  Be careful to avoid resetting
 455                 // cl_timestamp, which may disturb time-based lists on some sites.
 456                 // @todo This block should be killed, it's duplicating code
 457                 // from LinksUpdate::getCategoryInsertions() and friends.
 458                 $prefixes = $dbw->select(
 459                         'categorylinks',
 460                         [ 'cl_sortkey_prefix', 'cl_to' ],
 461                         [ 'cl_from' => $pageid ],
 462                         __METHOD__
 463                 );
 464                 $services = MediaWikiServices::getInstance();
 465                 $type = $services->getNamespaceInfo()->
 466                         getCategoryLinkType( $this->newTitle->getNamespace() );
 467                 foreach ( $prefixes as $prefixRow ) {
 468                         $prefix = $prefixRow->cl_sortkey_prefix;
 469                         $catTo = $prefixRow->cl_to;
 470                         $dbw->update( 'categorylinks',
 471                                 [
 472                                         'cl_sortkey' => Collation::singleton()->getSortKey(
 473                                                         $this->newTitle->getCategorySortkey( $prefix ) ),
 474                                         'cl_collation' => $wgCategoryCollation,
 475                                         'cl_type' => $type,
 476                                         'cl_timestamp=cl_timestamp' ],
 477                                 [
 478                                         'cl_from' => $pageid,
 479                                         'cl_to' => $catTo ],
 480                                 __METHOD__
 481                         );
 482                 }
 483
 484                 $redirid = $this->oldTitle->getArticleID();
 485
 486                 if ( $protected ) {
 487                         # Protect the redirect title as the title used to be...
 488                         $res = $dbw->select(
 489                                 'page_restrictions',
 490                                 [ 'pr_type', 'pr_level', 'pr_cascade', 'pr_user', 'pr_expiry' ],
 491                                 [ 'pr_page' => $pageid ],
 492                                 __METHOD__,
 493                                 'FOR UPDATE'
 494                         );
 495                         $rowsInsert = [];
 496                         foreach ( $res as $row ) {
 497                                 $rowsInsert[] = [
 498                                         'pr_page' => $redirid,
 499                                         'pr_type' => $row->pr_type,
 500                                         'pr_level' => $row->pr_level,
 501                                         'pr_cascade' => $row->pr_cascade,
 502                                         'pr_user' => $row->pr_user,
 503                                         'pr_expiry' => $row->pr_expiry
 504                                 ];
 505                         }
 506                         $dbw->insert( 'page_restrictions', $rowsInsert, __METHOD__, [ 'IGNORE' ] );
 507
 508                         // Build comment for log
 509                         $comment = wfMessage(
 510                                 'prot_1movedto2',
 511                                 $this->oldTitle->getPrefixedText(),
 512                                 $this->newTitle->getPrefixedText()
 513                         )->inContentLanguage()->text();
 514                         if ( $reason ) {
 515                                 $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
 516                         }
 517
 518                         // reread inserted pr_ids for log relation
 519                         $insertedPrIds = $dbw->select(
 520                                 'page_restrictions',
 521                                 'pr_id',
 522                                 [ 'pr_page' => $redirid ],
 523                                 __METHOD__
 524                         );
 525                         $logRelationsValues = [];
 526                         foreach ( $insertedPrIds as $prid ) {
 527                                 $logRelationsValues[] = $prid->pr_id;
 528                         }
 529
 530                         // Update the protection log
 531                         $logEntry = new ManualLogEntry( 'protect', 'move_prot' );
 532                         $logEntry->setTarget( $this->newTitle );
 533                         $logEntry->setComment( $comment );
 534                         $logEntry->setPerformer( $user );
 535                         $logEntry->setParameters( [
 536                                 '4::oldtitle' => $this->oldTitle->getPrefixedText(),
 537                         ] );
 538                         $logEntry->setRelations( [ 'pr_id' => $logRelationsValues ] );
 539                         $logEntry->setTags( $changeTags );
 540                         $logId = $logEntry->insert();
 541                         $logEntry->publish( $logId );
 542                 }
 543
 544                 // Update *_from_namespace fields as needed
 545                 if ( $this->oldTitle->getNamespace() != $this->newTitle->getNamespace() ) {
 546                         $dbw->update( 'pagelinks',
 547                                 [ 'pl_from_namespace' => $this->newTitle->getNamespace() ],
 548                                 [ 'pl_from' => $pageid ],
 549                                 __METHOD__
 550                         );
 551                         $dbw->update( 'templatelinks',
 552                                 [ 'tl_from_namespace' => $this->newTitle->getNamespace() ],
 553                                 [ 'tl_from' => $pageid ],
 554                                 __METHOD__
 555                         );
 556                         $dbw->update( 'imagelinks',
 557                                 [ 'il_from_namespace' => $this->newTitle->getNamespace() ],
 558                                 [ 'il_from' => $pageid ],
 559                                 __METHOD__
 560                         );
 561                 }
 562
 563                 # Update watchlists
 564                 $oldtitle = $this->oldTitle->getDBkey();
 565                 $newtitle = $this->newTitle->getDBkey();
 566                 $oldsnamespace = $services->getNamespaceInfo()->
 567                         getSubject( $this->oldTitle->getNamespace() );
 568                 $newsnamespace = $services->getNamespaceInfo()->
 569                         getSubject( $this->newTitle->getNamespace() );
 570                 if ( $oldsnamespace != $newsnamespace || $oldtitle != $newtitle ) {
 571                         $services->getWatchedItemStore()->duplicateAllAssociatedEntries(
 572                                 $this->oldTitle, $this->newTitle );
 573                 }
 574
 575                 // If it is a file then move it last.
 576                 // This is done after all database changes so that file system errors cancel the transaction.
 577                 if ( $this->oldTitle->getNamespace() == NS_FILE ) {
 578                         $status = $this->moveFile( $this->oldTitle, $this->newTitle );
 579                         if ( !$status->isOK() ) {
 580                                 $dbw->cancelAtomic( __METHOD__ );
 581                                 return $status;
 582                         }
 583                 }
 584
 585                 Hooks::run(
 586                         'TitleMoveCompleting',
 587                         [ $this->oldTitle, $this->newTitle,
 588                                 $user, $pageid, $redirid, $reason, $nullRevision ]
 589                 );
 590
 591                 $dbw->endAtomic( __METHOD__ );
 592
 593                 $params = [
 594                         &$this->oldTitle,
 595                         &$this->newTitle,
 596                         &$user,
 597                         $pageid,
 598                         $redirid,
 599                         $reason,
 600                         $nullRevision
 601                 ];
 602                 // Keep each single hook handler atomic
 603                 DeferredUpdates::addUpdate(
 604                         new AtomicSectionUpdate(
 605                                 $dbw,
 606                                 __METHOD__,
 607                                 // Hold onto $user to avoid HHVM bug where it no longer
 608                                 // becomes a reference (T118683)
 609                                 function () use ( $params, &$user ) {
 610                                         Hooks::run( 'TitleMoveComplete', $params );
 611                                 }
 612                         )
 613                 );
 614
 615                 return Status::newGood();
 616         }
 617
 618         /**
 619          * Move a file associated with a page to a new location.
 620          * Can also be used to revert after a DB failure.
 621          *
 622          * @private
 623          * @param Title $oldTitle Old location to move the file from.
 624          * @param Title $newTitle New location to move the file to.
 625          * @return Status
 626          */
 627         private function moveFile( $oldTitle, $newTitle ) {
 628                 $status = Status::newFatal(
 629                         'cannotdelete',
 630                         $oldTitle->getPrefixedText()
 631                 );
 632
 633                 $file = wfLocalFile( $oldTitle );
 634                 $file->load( File::READ_LATEST );
 635                 if ( $file->exists() ) {
 636                         $status = $file->move( $newTitle );
 637                 }
 638
 639                 // Clear RepoGroup process cache
 640                 RepoGroup::singleton()->clearCache( $oldTitle );
 641                 RepoGroup::singleton()->clearCache( $newTitle ); # clear false negative cache
 642                 return $status;
 643         }
 644
 645         /**
 646          * Move page to a title which is either a redirect to the
 647          * source page or nonexistent
 648          *
 649          * @todo This was basically directly moved from Title, it should be split into
 650          *   smaller functions
 651          * @param User $user the User doing the move
 652          * @param Title $nt The page to move to, which should be a redirect or non-existent
 653          * @param string $reason The reason for the move
 654          * @param bool $createRedirect Whether to leave a redirect at the old title. Does not check
 655          *   if the user has the suppressredirect right
 656          * @param string[] $changeTags Change tags to apply to the entry in the move log
 657          * @return Revision the revision created by the move
 658          * @throws MWException
 659          */
 660         private function moveToInternal( User $user, &$nt, $reason = '', $createRedirect = true,
 661                 array $changeTags = []
 662         ) {
 663                 if ( $nt->exists() ) {
 664                         $moveOverRedirect = true;
 665                         $logType = 'move_redir';
 666                 } else {
 667                         $moveOverRedirect = false;
 668                         $logType = 'move';
 669                 }
 670
 671                 if ( $moveOverRedirect ) {
 672                         $overwriteMessage = wfMessage(
 673                                         'delete_and_move_reason',
 674                                         $this->oldTitle->getPrefixedText()
 675                                 )->inContentLanguage()->text();
 676                         $newpage = WikiPage::factory( $nt );
 677                         $errs = [];
 678                         $status = $newpage->doDeleteArticleReal(
 679                                 $overwriteMessage,
 680                                 /* $suppress */ false,
 681                                 $nt->getArticleID(),
 682                                 /* $commit */ false,
 683                                 $errs,
 684                                 $user,
 685                                 $changeTags,
 686                                 'delete_redir'
 687                         );
 688
 689                         if ( !$status->isGood() ) {
 690                                 throw new MWException( 'Failed to delete page-move revision: '
 691                                         . $status->getWikiText( false, false, 'en' ) );
 692                         }
 693
 694                         $nt->resetArticleID( false );
 695                 }
 696
 697                 if ( $createRedirect ) {
 698                         if ( $this->oldTitle->getNamespace() == NS_CATEGORY
 699                                 && !wfMessage( 'category-move-redirect-override' )->inContentLanguage()->isDisabled()
 700                         ) {
 701                                 $redirectContent = new WikitextContent(
 702                                         wfMessage( 'category-move-redirect-override' )
 703                                                 ->params( $nt->getPrefixedText() )->inContentLanguage()->plain() );
 704                         } else {
 705                                 $contentHandler = ContentHandler::getForTitle( $this->oldTitle );
 706                                 $redirectContent = $contentHandler->makeRedirectContent( $nt,
 707                                         wfMessage( 'move-redirect-text' )->inContentLanguage()->plain() );
 708                         }
 709
 710                         // NOTE: If this page's content model does not support redirects, $redirectContent will be null.
 711                 } else {
 712                         $redirectContent = null;
 713                 }
 714
 715                 // Figure out whether the content model is no longer the default
 716                 $oldDefault = ContentHandler::getDefaultModelFor( $this->oldTitle );
 717                 $contentModel = $this->oldTitle->getContentModel();
 718                 $newDefault = ContentHandler::getDefaultModelFor( $nt );
 719                 $defaultContentModelChanging = ( $oldDefault !== $newDefault
 720                         && $oldDefault === $contentModel );
 721
 722                 // T59084: log_page should be the ID of the *moved* page
 723                 $oldid = $this->oldTitle->getArticleID();
 724                 $logTitle = clone $this->oldTitle;
 725
 726                 $logEntry = new ManualLogEntry( 'move', $logType );
 727                 $logEntry->setPerformer( $user );
 728                 $logEntry->setTarget( $logTitle );
 729                 $logEntry->setComment( $reason );
 730                 $logEntry->setParameters( [
 731                         '4::target' => $nt->getPrefixedText(),
 732                         '5::noredir' => $redirectContent ? '0' : '1',
 733                 ] );
 734
 735                 $formatter = LogFormatter::newFromEntry( $logEntry );
 736                 $formatter->setContext( RequestContext::newExtraneousContext( $this->oldTitle ) );
 737                 $comment = $formatter->getPlainActionText();
 738                 if ( $reason ) {
 739                         $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
 740                 }
 741
 742                 $dbw = wfGetDB( DB_MASTER );
 743
 744                 $oldpage = WikiPage::factory( $this->oldTitle );
 745                 $oldcountable = $oldpage->isCountable();
 746
 747                 $newpage = WikiPage::factory( $nt );
 748
 749                 # Change the name of the target page:
 750                 $dbw->update( 'page',
 751                         /* SET */ [
 752                                 'page_namespace' => $nt->getNamespace(),
 753                                 'page_title' => $nt->getDBkey(),
 754                         ],
 755                         /* WHERE */ [ 'page_id' => $oldid ],
 756                         __METHOD__
 757                 );
 758
 759                 # Save a null revision in the page's history notifying of the move
 760                 $nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true, $user );
 761                 if ( !is_object( $nullRevision ) ) {
 762                         throw new MWException( 'Failed to create null revision while moving page ID '
 763                                 . $oldid . ' to ' . $nt->getPrefixedDBkey() );
 764                 }
 765
 766                 $nullRevId = $nullRevision->insertOn( $dbw );
 767                 $logEntry->setAssociatedRevId( $nullRevId );
 768
 769                 /**
 770                  * T163966
 771                  * Increment user_editcount during page moves
 772                  * Moved from SpecialMovepage.php per T195550
 773                  */
 774                 $user->incEditCount();
 775
 776                 if ( !$redirectContent ) {
 777                         // Clean up the old title *before* reset article id - T47348
 778                         WikiPage::onArticleDelete( $this->oldTitle );
 779                 }
 780
 781                 $this->oldTitle->resetArticleID( 0 ); // 0 == non existing
 782                 $nt->resetArticleID( $oldid );
 783                 $newpage->loadPageData( WikiPage::READ_LOCKING ); // T48397
 784
 785                 $newpage->updateRevisionOn( $dbw, $nullRevision );
 786
 787                 Hooks::run( 'NewRevisionFromEditComplete',
 788                         [ $newpage, $nullRevision, $nullRevision->getParentId(), $user ] );
 789
 790                 $newpage->doEditUpdates( $nullRevision, $user,
 791                         [ 'changed' => false, 'moved' => true, 'oldcountable' => $oldcountable ] );
 792
 793                 // If the default content model changes, we need to populate rev_content_model
 794                 if ( $defaultContentModelChanging ) {
 795                         $dbw->update(
 796                                 'revision',
 797                                 [ 'rev_content_model' => $contentModel ],
 798                                 [ 'rev_page' => $nt->getArticleID(), 'rev_content_model IS NULL' ],
 799                                 __METHOD__
 800                         );
 801                 }
 802
 803                 WikiPage::onArticleCreate( $nt );
 804
 805                 # Recreate the redirect, this time in the other direction.
 806                 if ( $redirectContent ) {
 807                         $redirectArticle = WikiPage::factory( $this->oldTitle );
 808                         $redirectArticle->loadFromRow( false, WikiPage::READ_LOCKING ); // T48397
 809                         $newid = $redirectArticle->insertOn( $dbw );
 810                         if ( $newid ) { // sanity
 811                                 $this->oldTitle->resetArticleID( $newid );
 812                                 $redirectRevision = new Revision( [
 813                                         'title' => $this->oldTitle, // for determining the default content model
 814                                         'page' => $newid,
 815                                         'user_text' => $user->getName(),
 816                                         'user' => $user->getId(),
 817                                         'comment' => $comment,
 818                                         'content' => $redirectContent ] );
 819                                 $redirectRevId = $redirectRevision->insertOn( $dbw );
 820                                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
 821
 822                                 Hooks::run( 'NewRevisionFromEditComplete',
 823                                         [ $redirectArticle, $redirectRevision, false, $user ] );
 824
 825                                 $redirectArticle->doEditUpdates( $redirectRevision, $user, [ 'created' => true ] );
 826
 827                                 // make a copy because of log entry below
 828                                 $redirectTags = $changeTags;
 829                                 if ( in_array( 'mw-new-redirect', ChangeTags::getSoftwareTags() ) ) {
 830                                         $redirectTags[] = 'mw-new-redirect';
 831                                 }
 832                                 ChangeTags::addTags( $redirectTags, null, $redirectRevId, null );
 833                         }
 834                 }
 835
 836                 # Log the move
 837                 $logid = $logEntry->insert();
 838
 839                 $logEntry->setTags( $changeTags );
 840                 $logEntry->publish( $logid );
 841
 842                 return $nullRevision;
 843         }
 844 }