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