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
  24 /**
  25  * Handles the backend logic of moving a page from one title
  26  * to another.
  27  *
  28  * @since 1.24
  29  */
  30 class MovePage {
  31
  32         /**
  33          * @var Title
  34          */
  35         protected $oldTitle;
  36
  37         /**
  38          * @var Title
  39          */
  40         protected $newTitle;
  41
  42         public function __construct( Title $oldTitle, Title $newTitle ) {
  43                 $this->oldTitle = $oldTitle;
  44                 $this->newTitle = $newTitle;
  45         }
  46
  47         public function checkPermissions( User $user, $reason ) {
  48                 $status = new Status();
  49
  50                 $errors = wfMergeErrorArrays(
  51                         $this->oldTitle->getUserPermissionsErrors( 'move', $user ),
  52                         $this->oldTitle->getUserPermissionsErrors( 'edit', $user ),
  53                         $this->newTitle->getUserPermissionsErrors( 'move-target', $user ),
  54                         $this->newTitle->getUserPermissionsErrors( 'edit', $user )
  55                 );
  56
  57                 // Convert into a Status object
  58                 if ( $errors ) {
  59                         foreach ( $errors as $error ) {
  60                                 call_user_func_array( [ $status, 'fatal' ], $error );
  61                         }
  62                 }
  63
  64                 if ( EditPage::matchSummarySpamRegex( $reason ) !== false ) {
  65                         // This is kind of lame, won't display nice
  66                         $status->fatal( 'spamprotectiontext' );
  67                 }
  68
  69                 $tp = $this->newTitle->getTitleProtection();
  70                 if ( $tp !== false && !$user->isAllowed( $tp['permission'] ) ) {
  71                                 $status->fatal( 'cantmove-titleprotected' );
  72                 }
  73
  74                 Hooks::run( 'MovePageCheckPermissions',
  75                         [ $this->oldTitle, $this->newTitle, $user, $reason, $status ]
  76                 );
  77
  78                 return $status;
  79         }
  80
  81         /**
  82          * Does various sanity checks that the move is
  83          * valid. Only things based on the two titles
  84          * should be checked here.
  85          *
  86          * @return Status
  87          */
  88         public function isValidMove() {
  89                 global $wgContentHandlerUseDB;
  90                 $status = new Status();
  91
  92                 if ( $this->oldTitle->equals( $this->newTitle ) ) {
  93                         $status->fatal( 'selfmove' );
  94                 }
  95                 if ( !$this->oldTitle->isMovable() ) {
  96                         $status->fatal( 'immobile-source-namespace', $this->oldTitle->getNsText() );
  97                 }
  98                 if ( $this->newTitle->isExternal() ) {
  99                         $status->fatal( 'immobile-target-namespace-iw' );
 100                 }
 101                 if ( !$this->newTitle->isMovable() ) {
 102                         $status->fatal( 'immobile-target-namespace', $this->newTitle->getNsText() );
 103                 }
 104
 105                 $oldid = $this->oldTitle->getArticleID();
 106
 107                 if ( strlen( $this->newTitle->getDBkey() ) < 1 ) {
 108                         $status->fatal( 'articleexists' );
 109                 }
 110                 if (
 111                         ( $this->oldTitle->getDBkey() == '' ) ||
 112                         ( !$oldid ) ||
 113                         ( $this->newTitle->getDBkey() == '' )
 114                 ) {
 115                         $status->fatal( 'badarticleerror' );
 116                 }
 117
 118                 # The move is allowed only if (1) the target doesn't exist, or
 119                 # (2) the target is a redirect to the source, and has no history
 120                 # (so we can undo bad moves right after they're done).
 121                 if ( $this->newTitle->getArticleID() && !$this->isValidMoveTarget() ) {
 122                         $status->fatal( 'articleexists' );
 123                 }
 124
 125                 // Content model checks
 126                 if ( !$wgContentHandlerUseDB &&
 127                         $this->oldTitle->getContentModel() !== $this->newTitle->getContentModel() ) {
 128                         // can't move a page if that would change the page's content model
 129                         $status->fatal(
 130                                 'bad-target-model',
 131                                 ContentHandler::getLocalizedName( $this->oldTitle->getContentModel() ),
 132                                 ContentHandler::getLocalizedName( $this->newTitle->getContentModel() )
 133                         );
 134                 }
 135
 136                 // Image-specific checks
 137                 if ( $this->oldTitle->inNamespace( NS_FILE ) ) {
 138                         $status->merge( $this->isValidFileMove() );
 139                 }
 140
 141                 if ( $this->newTitle->inNamespace( NS_FILE ) && !$this->oldTitle->inNamespace( NS_FILE ) ) {
 142                         $status->fatal( 'nonfile-cannot-move-to-file' );
 143                 }
 144
 145                 // Hook for extensions to say a title can't be moved for technical reasons
 146                 Hooks::run( 'MovePageIsValidMove', [ $this->oldTitle, $this->newTitle, $status ] );
 147
 148                 return $status;
 149         }
 150
 151         /**
 152          * Sanity checks for when a file is being moved
 153          *
 154          * @return Status
 155          */
 156         protected function isValidFileMove() {
 157                 $status = new Status();
 158                 $file = wfLocalFile( $this->oldTitle );
 159                 $file->load( File::READ_LATEST );
 160                 if ( $file->exists() ) {
 161                         if ( $this->newTitle->getText() != wfStripIllegalFilenameChars( $this->newTitle->getText() ) ) {
 162                                 $status->fatal( 'imageinvalidfilename' );
 163                         }
 164                         if ( !File::checkExtensionCompatibility( $file, $this->newTitle->getDBkey() ) ) {
 165                                 $status->fatal( 'imagetypemismatch' );
 166                         }
 167                 }
 168
 169                 if ( !$this->newTitle->inNamespace( NS_FILE ) ) {
 170                         $status->fatal( 'imagenocrossnamespace' );
 171                 }
 172
 173                 return $status;
 174         }
 175
 176         /**
 177          * Checks if $this can be moved to a given Title
 178          * - Selects for update, so don't call it unless you mean business
 179          *
 180          * @since 1.25
 181          * @return bool
 182          */
 183         protected function isValidMoveTarget() {
 184                 # Is it an existing file?
 185                 if ( $this->newTitle->inNamespace( NS_FILE ) ) {
 186                         $file = wfLocalFile( $this->newTitle );
 187                         $file->load( File::READ_LATEST );
 188                         if ( $file->exists() ) {
 189                                 wfDebug( __METHOD__ . ": file exists\n" );
 190                                 return false;
 191                         }
 192                 }
 193                 # Is it a redirect with no history?
 194                 if ( !$this->newTitle->isSingleRevRedirect() ) {
 195                         wfDebug( __METHOD__ . ": not a one-rev redirect\n" );
 196                         return false;
 197                 }
 198                 # Get the article text
 199                 $rev = Revision::newFromTitle( $this->newTitle, false, Revision::READ_LATEST );
 200                 if ( !is_object( $rev ) ) {
 201                         return false;
 202                 }
 203                 $content = $rev->getContent();
 204                 # Does the redirect point to the source?
 205                 # Or is it a broken self-redirect, usually caused by namespace collisions?
 206                 $redirTitle = $content ? $content->getRedirectTarget() : null;
 207
 208                 if ( $redirTitle ) {
 209                         if ( $redirTitle->getPrefixedDBkey() !== $this->oldTitle->getPrefixedDBkey() &&
 210                                 $redirTitle->getPrefixedDBkey() !== $this->newTitle->getPrefixedDBkey() ) {
 211                                 wfDebug( __METHOD__ . ": redirect points to other page\n" );
 212                                 return false;
 213                         } else {
 214                                 return true;
 215                         }
 216                 } else {
 217                         # Fail safe (not a redirect after all. strange.)
 218                         wfDebug( __METHOD__ . ": failsafe: database says " . $this->newTitle->getPrefixedDBkey() .
 219                                 " is a redirect, but it doesn't contain a valid redirect.\n" );
 220                         return false;
 221                 }
 222         }
 223
 224         /**
 225          * @param User $user
 226          * @param string $reason
 227          * @param bool $createRedirect
 228          * @return Status
 229          */
 230         public function move( User $user, $reason, $createRedirect ) {
 231                 global $wgCategoryCollation;
 232
 233                 Hooks::run( 'TitleMove', [ $this->oldTitle, $this->newTitle, $user ] );
 234
 235                 // If it is a file, move it first.
 236                 // It is done before all other moving stuff is done because it's hard to revert.
 237                 $dbw = wfGetDB( DB_MASTER );
 238                 if ( $this->oldTitle->getNamespace() == NS_FILE ) {
 239                         $file = wfLocalFile( $this->oldTitle );
 240                         $file->load( File::READ_LATEST );
 241                         if ( $file->exists() ) {
 242                                 $status = $file->move( $this->newTitle );
 243                                 if ( !$status->isOK() ) {
 244                                         return $status;
 245                                 }
 246                         }
 247                         // Clear RepoGroup process cache
 248                         RepoGroup::singleton()->clearCache( $this->oldTitle );
 249                         RepoGroup::singleton()->clearCache( $this->newTitle ); # clear false negative cache
 250                 }
 251
 252                 $dbw->startAtomic( __METHOD__ );
 253
 254                 Hooks::run( 'TitleMoveStarting', [ $this->oldTitle, $this->newTitle, $user ] );
 255
 256                 $pageid = $this->oldTitle->getArticleID( Title::GAID_FOR_UPDATE );
 257                 $protected = $this->oldTitle->isProtected();
 258
 259                 // Do the actual move; if this fails, it will throw an MWException(!)
 260                 $nullRevision = $this->moveToInternal( $user, $this->newTitle, $reason, $createRedirect );
 261
 262                 // Refresh the sortkey for this row.  Be careful to avoid resetting
 263                 // cl_timestamp, which may disturb time-based lists on some sites.
 264                 // @todo This block should be killed, it's duplicating code
 265                 // from LinksUpdate::getCategoryInsertions() and friends.
 266                 $prefixes = $dbw->select(
 267                         'categorylinks',
 268                         [ 'cl_sortkey_prefix', 'cl_to' ],
 269                         [ 'cl_from' => $pageid ],
 270                         __METHOD__
 271                 );
 272                 if ( $this->newTitle->getNamespace() == NS_CATEGORY ) {
 273                         $type = 'subcat';
 274                 } elseif ( $this->newTitle->getNamespace() == NS_FILE ) {
 275                         $type = 'file';
 276                 } else {
 277                         $type = 'page';
 278                 }
 279                 foreach ( $prefixes as $prefixRow ) {
 280                         $prefix = $prefixRow->cl_sortkey_prefix;
 281                         $catTo = $prefixRow->cl_to;
 282                         $dbw->update( 'categorylinks',
 283                                 [
 284                                         'cl_sortkey' => Collation::singleton()->getSortKey(
 285                                                         $this->newTitle->getCategorySortkey( $prefix ) ),
 286                                         'cl_collation' => $wgCategoryCollation,
 287                                         'cl_type' => $type,
 288                                         'cl_timestamp=cl_timestamp' ],
 289                                 [
 290                                         'cl_from' => $pageid,
 291                                         'cl_to' => $catTo ],
 292                                 __METHOD__
 293                         );
 294                 }
 295
 296                 $redirid = $this->oldTitle->getArticleID();
 297
 298                 if ( $protected ) {
 299                         # Protect the redirect title as the title used to be...
 300                         $dbw->insertSelect( 'page_restrictions', 'page_restrictions',
 301                                 [
 302                                         'pr_page' => $redirid,
 303                                         'pr_type' => 'pr_type',
 304                                         'pr_level' => 'pr_level',
 305                                         'pr_cascade' => 'pr_cascade',
 306                                         'pr_user' => 'pr_user',
 307                                         'pr_expiry' => 'pr_expiry'
 308                                 ],
 309                                 [ 'pr_page' => $pageid ],
 310                                 __METHOD__,
 311                                 [ 'IGNORE' ]
 312                         );
 313
 314                         // Build comment for log
 315                         $comment = wfMessage(
 316                                 'prot_1movedto2',
 317                                 $this->oldTitle->getPrefixedText(),
 318                                 $this->newTitle->getPrefixedText()
 319                         )->inContentLanguage()->text();
 320                         if ( $reason ) {
 321                                 $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
 322                         }
 323
 324                         // reread inserted pr_ids for log relation
 325                         $insertedPrIds = $dbw->select(
 326                                 'page_restrictions',
 327                                 'pr_id',
 328                                 [ 'pr_page' => $redirid ],
 329                                 __METHOD__
 330                         );
 331                         $logRelationsValues = [];
 332                         foreach ( $insertedPrIds as $prid ) {
 333                                 $logRelationsValues[] = $prid->pr_id;
 334                         }
 335
 336                         // Update the protection log
 337                         $logEntry = new ManualLogEntry( 'protect', 'move_prot' );
 338                         $logEntry->setTarget( $this->newTitle );
 339                         $logEntry->setComment( $comment );
 340                         $logEntry->setPerformer( $user );
 341                         $logEntry->setParameters( [
 342                                 '4::oldtitle' => $this->oldTitle->getPrefixedText(),
 343                         ] );
 344                         $logEntry->setRelations( [ 'pr_id' => $logRelationsValues ] );
 345                         $logId = $logEntry->insert();
 346                         $logEntry->publish( $logId );
 347                 }
 348
 349                 // Update *_from_namespace fields as needed
 350                 if ( $this->oldTitle->getNamespace() != $this->newTitle->getNamespace() ) {
 351                         $dbw->update( 'pagelinks',
 352                                 [ 'pl_from_namespace' => $this->newTitle->getNamespace() ],
 353                                 [ 'pl_from' => $pageid ],
 354                                 __METHOD__
 355                         );
 356                         $dbw->update( 'templatelinks',
 357                                 [ 'tl_from_namespace' => $this->newTitle->getNamespace() ],
 358                                 [ 'tl_from' => $pageid ],
 359                                 __METHOD__
 360                         );
 361                         $dbw->update( 'imagelinks',
 362                                 [ 'il_from_namespace' => $this->newTitle->getNamespace() ],
 363                                 [ 'il_from' => $pageid ],
 364                                 __METHOD__
 365                         );
 366                 }
 367
 368                 # Update watchlists
 369                 $oldtitle = $this->oldTitle->getDBkey();
 370                 $newtitle = $this->newTitle->getDBkey();
 371                 $oldsnamespace = MWNamespace::getSubject( $this->oldTitle->getNamespace() );
 372                 $newsnamespace = MWNamespace::getSubject( $this->newTitle->getNamespace() );
 373                 if ( $oldsnamespace != $newsnamespace || $oldtitle != $newtitle ) {
 374                         $store = MediaWikiServices::getInstance()->getWatchedItemStore();
 375                         $store->duplicateAllAssociatedEntries( $this->oldTitle, $this->newTitle );
 376                 }
 377
 378                 Hooks::run(
 379                         'TitleMoveCompleting',
 380                         [ $this->oldTitle, $this->newTitle,
 381                                 $user, $pageid, $redirid, $reason, $nullRevision ]
 382                 );
 383
 384                 $dbw->endAtomic( __METHOD__ );
 385
 386                 $params = [
 387                         &$this->oldTitle,
 388                         &$this->newTitle,
 389                         &$user,
 390                         $pageid,
 391                         $redirid,
 392                         $reason,
 393                         $nullRevision
 394                 ];
 395                 // Keep each single hook handler atomic
 396                 DeferredUpdates::addUpdate(
 397                         new AtomicSectionUpdate(
 398                                 $dbw,
 399                                 __METHOD__,
 400                                 function () use ( $params ) {
 401                                         Hooks::run( 'TitleMoveComplete', $params );
 402                                 }
 403                         )
 404                 );
 405
 406                 return Status::newGood();
 407         }
 408
 409         /**
 410          * Move page to a title which is either a redirect to the
 411          * source page or nonexistent
 412          *
 413          * @fixme This was basically directly moved from Title, it should be split into smaller functions
 414          * @param User $user the User doing the move
 415          * @param Title $nt The page to move to, which should be a redirect or non-existent
 416          * @param string $reason The reason for the move
 417          * @param bool $createRedirect Whether to leave a redirect at the old title. Does not check
 418          *   if the user has the suppressredirect right
 419          * @return Revision the revision created by the move
 420          * @throws MWException
 421          */
 422         private function moveToInternal( User $user, &$nt, $reason = '', $createRedirect = true ) {
 423                 global $wgContLang;
 424
 425                 if ( $nt->exists() ) {
 426                         $moveOverRedirect = true;
 427                         $logType = 'move_redir';
 428                 } else {
 429                         $moveOverRedirect = false;
 430                         $logType = 'move';
 431                 }
 432
 433                 if ( $moveOverRedirect ) {
 434                         $overwriteMessage = wfMessage(
 435                                         'delete_and_move_reason',
 436                                         $this->oldTitle->getPrefixedText()
 437                                 )->text();
 438                         $newpage = WikiPage::factory( $nt );
 439                         $errs = [];
 440                         $status = $newpage->doDeleteArticleReal(
 441                                 $overwriteMessage,
 442                                 /* $suppress */ false,
 443                                 $nt->getArticleId(),
 444                                 /* $commit */ false,
 445                                 $errs,
 446                                 $user
 447                         );
 448
 449                         if ( !$status->isGood() ) {
 450                                 throw new MWException( 'Failed to delete page-move revision: ' . $status );
 451                         }
 452
 453                         $nt->resetArticleID( false );
 454                 }
 455
 456                 if ( $createRedirect ) {
 457                         if ( $this->oldTitle->getNamespace() == NS_CATEGORY
 458                                 && !wfMessage( 'category-move-redirect-override' )->inContentLanguage()->isDisabled()
 459                         ) {
 460                                 $redirectContent = new WikitextContent(
 461                                         wfMessage( 'category-move-redirect-override' )
 462                                                 ->params( $nt->getPrefixedText() )->inContentLanguage()->plain() );
 463                         } else {
 464                                 $contentHandler = ContentHandler::getForTitle( $this->oldTitle );
 465                                 $redirectContent = $contentHandler->makeRedirectContent( $nt,
 466                                         wfMessage( 'move-redirect-text' )->inContentLanguage()->plain() );
 467                         }
 468
 469                         // NOTE: If this page's content model does not support redirects, $redirectContent will be null.
 470                 } else {
 471                         $redirectContent = null;
 472                 }
 473
 474                 // Figure out whether the content model is no longer the default
 475                 $oldDefault = ContentHandler::getDefaultModelFor( $this->oldTitle );
 476                 $contentModel = $this->oldTitle->getContentModel();
 477                 $newDefault = ContentHandler::getDefaultModelFor( $nt );
 478                 $defaultContentModelChanging = ( $oldDefault !== $newDefault
 479                         && $oldDefault === $contentModel );
 480
 481                 // bug 57084: log_page should be the ID of the *moved* page
 482                 $oldid = $this->oldTitle->getArticleID();
 483                 $logTitle = clone $this->oldTitle;
 484
 485                 $logEntry = new ManualLogEntry( 'move', $logType );
 486                 $logEntry->setPerformer( $user );
 487                 $logEntry->setTarget( $logTitle );
 488                 $logEntry->setComment( $reason );
 489                 $logEntry->setParameters( [
 490                         '4::target' => $nt->getPrefixedText(),
 491                         '5::noredir' => $redirectContent ? '0': '1',
 492                 ] );
 493
 494                 $formatter = LogFormatter::newFromEntry( $logEntry );
 495                 $formatter->setContext( RequestContext::newExtraneousContext( $this->oldTitle ) );
 496                 $comment = $formatter->getPlainActionText();
 497                 if ( $reason ) {
 498                         $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
 499                 }
 500                 # Truncate for whole multibyte characters.
 501                 $comment = $wgContLang->truncate( $comment, 255 );
 502
 503                 $dbw = wfGetDB( DB_MASTER );
 504
 505                 $oldpage = WikiPage::factory( $this->oldTitle );
 506                 $oldcountable = $oldpage->isCountable();
 507
 508                 $newpage = WikiPage::factory( $nt );
 509
 510                 # Save a null revision in the page's history notifying of the move
 511                 $nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true, $user );
 512                 if ( !is_object( $nullRevision ) ) {
 513                         throw new MWException( 'No valid null revision produced in ' . __METHOD__ );
 514                 }
 515
 516                 $nullRevision->insertOn( $dbw );
 517
 518                 # Change the name of the target page:
 519                 $dbw->update( 'page',
 520                         /* SET */ [
 521                                 'page_namespace' => $nt->getNamespace(),
 522                                 'page_title' => $nt->getDBkey(),
 523                         ],
 524                         /* WHERE */ [ 'page_id' => $oldid ],
 525                         __METHOD__
 526                 );
 527
 528                 // clean up the old title before reset article id - bug 45348
 529                 if ( !$redirectContent ) {
 530                         WikiPage::onArticleDelete( $this->oldTitle );
 531                 }
 532
 533                 $this->oldTitle->resetArticleID( 0 ); // 0 == non existing
 534                 $nt->resetArticleID( $oldid );
 535                 $newpage->loadPageData( WikiPage::READ_LOCKING ); // bug 46397
 536
 537                 $newpage->updateRevisionOn( $dbw, $nullRevision );
 538
 539                 Hooks::run( 'NewRevisionFromEditComplete',
 540                         [ $newpage, $nullRevision, $nullRevision->getParentId(), $user ] );
 541
 542                 $newpage->doEditUpdates( $nullRevision, $user,
 543                         [ 'changed' => false, 'moved' => true, 'oldcountable' => $oldcountable ] );
 544
 545                 // If the default content model changes, we need to populate rev_content_model
 546                 if ( $defaultContentModelChanging ) {
 547                         $dbw->update(
 548                                 'revision',
 549                                 [ 'rev_content_model' => $contentModel ],
 550                                 [ 'rev_page' => $nt->getArticleID(), 'rev_content_model IS NULL' ],
 551                                 __METHOD__
 552                         );
 553                 }
 554
 555                 WikiPage::onArticleCreate( $nt );
 556
 557                 # Recreate the redirect, this time in the other direction.
 558                 if ( $redirectContent ) {
 559                         $redirectArticle = WikiPage::factory( $this->oldTitle );
 560                         $redirectArticle->loadFromRow( false, WikiPage::READ_LOCKING ); // bug 46397
 561                         $newid = $redirectArticle->insertOn( $dbw );
 562                         if ( $newid ) { // sanity
 563                                 $this->oldTitle->resetArticleID( $newid );
 564                                 $redirectRevision = new Revision( [
 565                                         'title' => $this->oldTitle, // for determining the default content model
 566                                         'page' => $newid,
 567                                         'user_text' => $user->getName(),
 568                                         'user' => $user->getId(),
 569                                         'comment' => $comment,
 570                                         'content' => $redirectContent ] );
 571                                 $redirectRevision->insertOn( $dbw );
 572                                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
 573
 574                                 Hooks::run( 'NewRevisionFromEditComplete',
 575                                         [ $redirectArticle, $redirectRevision, false, $user ] );
 576
 577                                 $redirectArticle->doEditUpdates( $redirectRevision, $user, [ 'created' => true ] );
 578                         }
 579                 }
 580
 581                 # Log the move
 582                 $logid = $logEntry->insert();
 583                 $logEntry->publish( $logid );
 584
 585                 return $nullRevision;
 586         }
 587 }