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          * Moves *without* any sort of safety or sanity checks. Hooks can still fail the move, however.
 291          *
 292          * @param User $user
 293          * @param string $reason
 294          * @param bool $createRedirect
 295          * @param string[] $changeTags Change tags to apply to the entry in the move log
 296          * @return Status
 297          */
 298         private function moveUnsafe( User $user, $reason, $createRedirect, array $changeTags ) {
 299                 global $wgCategoryCollation;
 300
 301                 $status = Status::newGood();
 302                 Hooks::run( 'TitleMove', [ $this->oldTitle, $this->newTitle, $user, $reason, &$status ] );
 303                 if ( !$status->isOK() ) {
 304                         // Move was aborted by the hook
 305                         return $status;
 306                 }
 307
 308                 $dbw = wfGetDB( DB_MASTER );
 309                 $dbw->startAtomic( __METHOD__, IDatabase::ATOMIC_CANCELABLE );
 310
 311                 Hooks::run( 'TitleMoveStarting', [ $this->oldTitle, $this->newTitle, $user ] );
 312
 313                 $pageid = $this->oldTitle->getArticleID( Title::GAID_FOR_UPDATE );
 314                 $protected = $this->oldTitle->isProtected();
 315
 316                 // Do the actual move; if this fails, it will throw an MWException(!)
 317                 $nullRevision = $this->moveToInternal( $user, $this->newTitle, $reason, $createRedirect,
 318                         $changeTags );
 319
 320                 // Refresh the sortkey for this row.  Be careful to avoid resetting
 321                 // cl_timestamp, which may disturb time-based lists on some sites.
 322                 // @todo This block should be killed, it's duplicating code
 323                 // from LinksUpdate::getCategoryInsertions() and friends.
 324                 $prefixes = $dbw->select(
 325                         'categorylinks',
 326                         [ 'cl_sortkey_prefix', 'cl_to' ],
 327                         [ 'cl_from' => $pageid ],
 328                         __METHOD__
 329                 );
 330                 $type = MediaWikiServices::getInstance()->getNamespaceInfo()->
 331                         getCategoryLinkType( $this->newTitle->getNamespace() );
 332                 foreach ( $prefixes as $prefixRow ) {
 333                         $prefix = $prefixRow->cl_sortkey_prefix;
 334                         $catTo = $prefixRow->cl_to;
 335                         $dbw->update( 'categorylinks',
 336                                 [
 337                                         'cl_sortkey' => Collation::singleton()->getSortKey(
 338                                                         $this->newTitle->getCategorySortkey( $prefix ) ),
 339                                         'cl_collation' => $wgCategoryCollation,
 340                                         'cl_type' => $type,
 341                                         'cl_timestamp=cl_timestamp' ],
 342                                 [
 343                                         'cl_from' => $pageid,
 344                                         'cl_to' => $catTo ],
 345                                 __METHOD__
 346                         );
 347                 }
 348
 349                 $redirid = $this->oldTitle->getArticleID();
 350
 351                 if ( $protected ) {
 352                         # Protect the redirect title as the title used to be...
 353                         $res = $dbw->select(
 354                                 'page_restrictions',
 355                                 [ 'pr_type', 'pr_level', 'pr_cascade', 'pr_user', 'pr_expiry' ],
 356                                 [ 'pr_page' => $pageid ],
 357                                 __METHOD__,
 358                                 'FOR UPDATE'
 359                         );
 360                         $rowsInsert = [];
 361                         foreach ( $res as $row ) {
 362                                 $rowsInsert[] = [
 363                                         'pr_page' => $redirid,
 364                                         'pr_type' => $row->pr_type,
 365                                         'pr_level' => $row->pr_level,
 366                                         'pr_cascade' => $row->pr_cascade,
 367                                         'pr_user' => $row->pr_user,
 368                                         'pr_expiry' => $row->pr_expiry
 369                                 ];
 370                         }
 371                         $dbw->insert( 'page_restrictions', $rowsInsert, __METHOD__, [ 'IGNORE' ] );
 372
 373                         // Build comment for log
 374                         $comment = wfMessage(
 375                                 'prot_1movedto2',
 376                                 $this->oldTitle->getPrefixedText(),
 377                                 $this->newTitle->getPrefixedText()
 378                         )->inContentLanguage()->text();
 379                         if ( $reason ) {
 380                                 $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
 381                         }
 382
 383                         // reread inserted pr_ids for log relation
 384                         $insertedPrIds = $dbw->select(
 385                                 'page_restrictions',
 386                                 'pr_id',
 387                                 [ 'pr_page' => $redirid ],
 388                                 __METHOD__
 389                         );
 390                         $logRelationsValues = [];
 391                         foreach ( $insertedPrIds as $prid ) {
 392                                 $logRelationsValues[] = $prid->pr_id;
 393                         }
 394
 395                         // Update the protection log
 396                         $logEntry = new ManualLogEntry( 'protect', 'move_prot' );
 397                         $logEntry->setTarget( $this->newTitle );
 398                         $logEntry->setComment( $comment );
 399                         $logEntry->setPerformer( $user );
 400                         $logEntry->setParameters( [
 401                                 '4::oldtitle' => $this->oldTitle->getPrefixedText(),
 402                         ] );
 403                         $logEntry->setRelations( [ 'pr_id' => $logRelationsValues ] );
 404                         $logEntry->setTags( $changeTags );
 405                         $logId = $logEntry->insert();
 406                         $logEntry->publish( $logId );
 407                 }
 408
 409                 // Update *_from_namespace fields as needed
 410                 if ( $this->oldTitle->getNamespace() != $this->newTitle->getNamespace() ) {
 411                         $dbw->update( 'pagelinks',
 412                                 [ 'pl_from_namespace' => $this->newTitle->getNamespace() ],
 413                                 [ 'pl_from' => $pageid ],
 414                                 __METHOD__
 415                         );
 416                         $dbw->update( 'templatelinks',
 417                                 [ 'tl_from_namespace' => $this->newTitle->getNamespace() ],
 418                                 [ 'tl_from' => $pageid ],
 419                                 __METHOD__
 420                         );
 421                         $dbw->update( 'imagelinks',
 422                                 [ 'il_from_namespace' => $this->newTitle->getNamespace() ],
 423                                 [ 'il_from' => $pageid ],
 424                                 __METHOD__
 425                         );
 426                 }
 427
 428                 # Update watchlists
 429                 $oldtitle = $this->oldTitle->getDBkey();
 430                 $newtitle = $this->newTitle->getDBkey();
 431                 $oldsnamespace = MWNamespace::getSubject( $this->oldTitle->getNamespace() );
 432                 $newsnamespace = MWNamespace::getSubject( $this->newTitle->getNamespace() );
 433                 if ( $oldsnamespace != $newsnamespace || $oldtitle != $newtitle ) {
 434                         $store = MediaWikiServices::getInstance()->getWatchedItemStore();
 435                         $store->duplicateAllAssociatedEntries( $this->oldTitle, $this->newTitle );
 436                 }
 437
 438                 // If it is a file then move it last.
 439                 // This is done after all database changes so that file system errors cancel the transaction.
 440                 if ( $this->oldTitle->getNamespace() == NS_FILE ) {
 441                         $status = $this->moveFile( $this->oldTitle, $this->newTitle );
 442                         if ( !$status->isOK() ) {
 443                                 $dbw->cancelAtomic( __METHOD__ );
 444                                 return $status;
 445                         }
 446                 }
 447
 448                 Hooks::run(
 449                         'TitleMoveCompleting',
 450                         [ $this->oldTitle, $this->newTitle,
 451                                 $user, $pageid, $redirid, $reason, $nullRevision ]
 452                 );
 453
 454                 $dbw->endAtomic( __METHOD__ );
 455
 456                 $params = [
 457                         &$this->oldTitle,
 458                         &$this->newTitle,
 459                         &$user,
 460                         $pageid,
 461                         $redirid,
 462                         $reason,
 463                         $nullRevision
 464                 ];
 465                 // Keep each single hook handler atomic
 466                 DeferredUpdates::addUpdate(
 467                         new AtomicSectionUpdate(
 468                                 $dbw,
 469                                 __METHOD__,
 470                                 // Hold onto $user to avoid HHVM bug where it no longer
 471                                 // becomes a reference (T118683)
 472                                 function () use ( $params, &$user ) {
 473                                         Hooks::run( 'TitleMoveComplete', $params );
 474                                 }
 475                         )
 476                 );
 477
 478                 return Status::newGood();
 479         }
 480
 481         /**
 482          * Move a file associated with a page to a new location.
 483          * Can also be used to revert after a DB failure.
 484          *
 485          * @private
 486          * @param Title $oldTitle Old location to move the file from.
 487          * @param Title $newTitle New location to move the file to.
 488          * @return Status
 489          */
 490         private function moveFile( $oldTitle, $newTitle ) {
 491                 $status = Status::newFatal(
 492                         'cannotdelete',
 493                         $oldTitle->getPrefixedText()
 494                 );
 495
 496                 $file = wfLocalFile( $oldTitle );
 497                 $file->load( File::READ_LATEST );
 498                 if ( $file->exists() ) {
 499                         $status = $file->move( $newTitle );
 500                 }
 501
 502                 // Clear RepoGroup process cache
 503                 RepoGroup::singleton()->clearCache( $oldTitle );
 504                 RepoGroup::singleton()->clearCache( $newTitle ); # clear false negative cache
 505                 return $status;
 506         }
 507
 508         /**
 509          * Move page to a title which is either a redirect to the
 510          * source page or nonexistent
 511          *
 512          * @todo This was basically directly moved from Title, it should be split into
 513          *   smaller functions
 514          * @param User $user the User doing the move
 515          * @param Title $nt The page to move to, which should be a redirect or non-existent
 516          * @param string $reason The reason for the move
 517          * @param bool $createRedirect Whether to leave a redirect at the old title. Does not check
 518          *   if the user has the suppressredirect right
 519          * @param string[] $changeTags Change tags to apply to the entry in the move log
 520          * @return Revision the revision created by the move
 521          * @throws MWException
 522          */
 523         private function moveToInternal( User $user, &$nt, $reason = '', $createRedirect = true,
 524                 array $changeTags = []
 525         ) {
 526                 if ( $nt->exists() ) {
 527                         $moveOverRedirect = true;
 528                         $logType = 'move_redir';
 529                 } else {
 530                         $moveOverRedirect = false;
 531                         $logType = 'move';
 532                 }
 533
 534                 if ( $moveOverRedirect ) {
 535                         $overwriteMessage = wfMessage(
 536                                         'delete_and_move_reason',
 537                                         $this->oldTitle->getPrefixedText()
 538                                 )->inContentLanguage()->text();
 539                         $newpage = WikiPage::factory( $nt );
 540                         $errs = [];
 541                         $status = $newpage->doDeleteArticleReal(
 542                                 $overwriteMessage,
 543                                 /* $suppress */ false,
 544                                 $nt->getArticleID(),
 545                                 /* $commit */ false,
 546                                 $errs,
 547                                 $user,
 548                                 $changeTags,
 549                                 'delete_redir'
 550                         );
 551
 552                         if ( !$status->isGood() ) {
 553                                 throw new MWException( 'Failed to delete page-move revision: '
 554                                         . $status->getWikiText( false, false, 'en' ) );
 555                         }
 556
 557                         $nt->resetArticleID( false );
 558                 }
 559
 560                 if ( $createRedirect ) {
 561                         if ( $this->oldTitle->getNamespace() == NS_CATEGORY
 562                                 && !wfMessage( 'category-move-redirect-override' )->inContentLanguage()->isDisabled()
 563                         ) {
 564                                 $redirectContent = new WikitextContent(
 565                                         wfMessage( 'category-move-redirect-override' )
 566                                                 ->params( $nt->getPrefixedText() )->inContentLanguage()->plain() );
 567                         } else {
 568                                 $contentHandler = ContentHandler::getForTitle( $this->oldTitle );
 569                                 $redirectContent = $contentHandler->makeRedirectContent( $nt,
 570                                         wfMessage( 'move-redirect-text' )->inContentLanguage()->plain() );
 571                         }
 572
 573                         // NOTE: If this page's content model does not support redirects, $redirectContent will be null.
 574                 } else {
 575                         $redirectContent = null;
 576                 }
 577
 578                 // Figure out whether the content model is no longer the default
 579                 $oldDefault = ContentHandler::getDefaultModelFor( $this->oldTitle );
 580                 $contentModel = $this->oldTitle->getContentModel();
 581                 $newDefault = ContentHandler::getDefaultModelFor( $nt );
 582                 $defaultContentModelChanging = ( $oldDefault !== $newDefault
 583                         && $oldDefault === $contentModel );
 584
 585                 // T59084: log_page should be the ID of the *moved* page
 586                 $oldid = $this->oldTitle->getArticleID();
 587                 $logTitle = clone $this->oldTitle;
 588
 589                 $logEntry = new ManualLogEntry( 'move', $logType );
 590                 $logEntry->setPerformer( $user );
 591                 $logEntry->setTarget( $logTitle );
 592                 $logEntry->setComment( $reason );
 593                 $logEntry->setParameters( [
 594                         '4::target' => $nt->getPrefixedText(),
 595                         '5::noredir' => $redirectContent ? '0' : '1',
 596                 ] );
 597
 598                 $formatter = LogFormatter::newFromEntry( $logEntry );
 599                 $formatter->setContext( RequestContext::newExtraneousContext( $this->oldTitle ) );
 600                 $comment = $formatter->getPlainActionText();
 601                 if ( $reason ) {
 602                         $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
 603                 }
 604
 605                 $dbw = wfGetDB( DB_MASTER );
 606
 607                 $oldpage = WikiPage::factory( $this->oldTitle );
 608                 $oldcountable = $oldpage->isCountable();
 609
 610                 $newpage = WikiPage::factory( $nt );
 611
 612                 # Change the name of the target page:
 613                 $dbw->update( 'page',
 614                         /* SET */ [
 615                                 'page_namespace' => $nt->getNamespace(),
 616                                 'page_title' => $nt->getDBkey(),
 617                         ],
 618                         /* WHERE */ [ 'page_id' => $oldid ],
 619                         __METHOD__
 620                 );
 621
 622                 # Save a null revision in the page's history notifying of the move
 623                 $nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true, $user );
 624                 if ( !is_object( $nullRevision ) ) {
 625                         throw new MWException( 'Failed to create null revision while moving page ID '
 626                                 . $oldid . ' to ' . $nt->getPrefixedDBkey() );
 627                 }
 628
 629                 $nullRevId = $nullRevision->insertOn( $dbw );
 630                 $logEntry->setAssociatedRevId( $nullRevId );
 631
 632                 /**
 633                  * T163966
 634                  * Increment user_editcount during page moves
 635                  * Moved from SpecialMovepage.php per T195550
 636                  */
 637                 $user->incEditCount();
 638
 639                 if ( !$redirectContent ) {
 640                         // Clean up the old title *before* reset article id - T47348
 641                         WikiPage::onArticleDelete( $this->oldTitle );
 642                 }
 643
 644                 $this->oldTitle->resetArticleID( 0 ); // 0 == non existing
 645                 $nt->resetArticleID( $oldid );
 646                 $newpage->loadPageData( WikiPage::READ_LOCKING ); // T48397
 647
 648                 $newpage->updateRevisionOn( $dbw, $nullRevision );
 649
 650                 Hooks::run( 'NewRevisionFromEditComplete',
 651                         [ $newpage, $nullRevision, $nullRevision->getParentId(), $user ] );
 652
 653                 $newpage->doEditUpdates( $nullRevision, $user,
 654                         [ 'changed' => false, 'moved' => true, 'oldcountable' => $oldcountable ] );
 655
 656                 // If the default content model changes, we need to populate rev_content_model
 657                 if ( $defaultContentModelChanging ) {
 658                         $dbw->update(
 659                                 'revision',
 660                                 [ 'rev_content_model' => $contentModel ],
 661                                 [ 'rev_page' => $nt->getArticleID(), 'rev_content_model IS NULL' ],
 662                                 __METHOD__
 663                         );
 664                 }
 665
 666                 WikiPage::onArticleCreate( $nt );
 667
 668                 # Recreate the redirect, this time in the other direction.
 669                 if ( $redirectContent ) {
 670                         $redirectArticle = WikiPage::factory( $this->oldTitle );
 671                         $redirectArticle->loadFromRow( false, WikiPage::READ_LOCKING ); // T48397
 672                         $newid = $redirectArticle->insertOn( $dbw );
 673                         if ( $newid ) { // sanity
 674                                 $this->oldTitle->resetArticleID( $newid );
 675                                 $redirectRevision = new Revision( [
 676                                         'title' => $this->oldTitle, // for determining the default content model
 677                                         'page' => $newid,
 678                                         'user_text' => $user->getName(),
 679                                         'user' => $user->getId(),
 680                                         'comment' => $comment,
 681                                         'content' => $redirectContent ] );
 682                                 $redirectRevId = $redirectRevision->insertOn( $dbw );
 683                                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
 684
 685                                 Hooks::run( 'NewRevisionFromEditComplete',
 686                                         [ $redirectArticle, $redirectRevision, false, $user ] );
 687
 688                                 $redirectArticle->doEditUpdates( $redirectRevision, $user, [ 'created' => true ] );
 689
 690                                 // make a copy because of log entry below
 691                                 $redirectTags = $changeTags;
 692                                 if ( in_array( 'mw-new-redirect', ChangeTags::getSoftwareTags() ) ) {
 693                                         $redirectTags[] = 'mw-new-redirect';
 694                                 }
 695                                 ChangeTags::addTags( $redirectTags, null, $redirectRevId, null );
 696                         }
 697                 }
 698
 699                 # Log the move
 700                 $logid = $logEntry->insert();
 701
 702                 $logEntry->setTags( $changeTags );
 703                 $logEntry->publish( $logid );
 704
 705                 return $nullRevision;
 706         }
 707 }