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