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( 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                 # The move is allowed only if (1) the target doesn't exist, or
  68                 # (2) the target is a redirect to the source, and has no history
  69                 # (so we can undo bad moves right after they're done).
  70
  71                 if ( $this->newTitle->getArticleID() ) { # Target exists; check for validity
  72                         if ( !$this->isValidMoveTarget() ) {
  73                                 $status->fatal( 'articleexists' );
  74                         }
  75                 } else {
  76                         $tp = $this->newTitle->getTitleProtection();
  77                         if ( $tp !== false ) {
  78                                 if ( !$user->isAllowed( $tp['permission'] ) ) {
  79                                         $status->fatal( 'cantmove-titleprotected' );
  80                                 }
  81                         }
  82                 }
  83
  84                 Hooks::run( 'MovePageCheckPermissions',
  85                         array( $this->oldTitle, $this->newTitle, $user, $reason, $status )
  86                 );
  87
  88                 return $status;
  89         }
  90
  91         /**
  92          * Does various sanity checks that the move is
  93          * valid. Only things based on the two titles
  94          * should be checked here.
  95          *
  96          * @return Status
  97          */
  98         public function isValidMove() {
  99                 global $wgContentHandlerUseDB;
 100                 $status = new Status();
 101
 102                 if ( $this->oldTitle->equals( $this->newTitle ) ) {
 103                         $status->fatal( 'selfmove' );
 104                 }
 105                 if ( !$this->oldTitle->isMovable() ) {
 106                         $status->fatal( 'immobile-source-namespace', $this->oldTitle->getNsText() );
 107                 }
 108                 if ( $this->newTitle->isExternal() ) {
 109                         $status->fatal( 'immobile-target-namespace-iw' );
 110                 }
 111                 if ( !$this->newTitle->isMovable() ) {
 112                         $status->fatal( 'immobile-target-namespace', $this->newTitle->getNsText() );
 113                 }
 114
 115                 $oldid = $this->oldTitle->getArticleID();
 116
 117                 if ( strlen( $this->newTitle->getDBkey() ) < 1 ) {
 118                         $status->fatal( 'articleexists' );
 119                 }
 120                 if (
 121                         ( $this->oldTitle->getDBkey() == '' ) ||
 122                         ( !$oldid ) ||
 123                         ( $this->newTitle->getDBkey() == '' )
 124                 ) {
 125                         $status->fatal( 'badarticleerror' );
 126                 }
 127
 128                 // Content model checks
 129                 if ( !$wgContentHandlerUseDB &&
 130                         $this->oldTitle->getContentModel() !== $this->newTitle->getContentModel() ) {
 131                         // can't move a page if that would change the page's content model
 132                         $status->fatal(
 133                                 'bad-target-model',
 134                                 ContentHandler::getLocalizedName( $this->oldTitle->getContentModel() ),
 135                                 ContentHandler::getLocalizedName( $this->newTitle->getContentModel() )
 136                         );
 137                 }
 138
 139                 // Image-specific checks
 140                 if ( $this->oldTitle->inNamespace( NS_FILE ) ) {
 141                         $status->merge( $this->isValidFileMove() );
 142                 }
 143
 144                 if ( $this->newTitle->inNamespace( NS_FILE ) && !$this->oldTitle->inNamespace( NS_FILE ) ) {
 145                         $status->fatal( 'nonfile-cannot-move-to-file' );
 146                 }
 147
 148                 // Hook for extensions to say a title can't be moved for technical reasons
 149                 Hooks::run( 'MovePageIsValidMove', array( $this->oldTitle, $this->newTitle, $status ) );
 150
 151                 return $status;
 152         }
 153
 154         /**
 155          * Sanity checks for when a file is being moved
 156          *
 157          * @return Status
 158          */
 159         protected function isValidFileMove() {
 160                 $status = new Status();
 161                 $file = wfLocalFile( $this->oldTitle );
 162                 $file->load( File::READ_LATEST );
 163                 if ( $file->exists() ) {
 164                         if ( $this->newTitle->getText() != wfStripIllegalFilenameChars( $this->newTitle->getText() ) ) {
 165                                 $status->fatal( 'imageinvalidfilename' );
 166                         }
 167                         if ( !File::checkExtensionCompatibility( $file, $this->newTitle->getDBkey() ) ) {
 168                                 $status->fatal( 'imagetypemismatch' );
 169                         }
 170                 }
 171
 172                 if ( !$this->newTitle->inNamespace( NS_FILE ) ) {
 173                         $status->fatal( 'imagenocrossnamespace' );
 174                 }
 175
 176                 return $status;
 177         }
 178
 179         /**
 180          * Checks if $this can be moved to a given Title
 181          * - Selects for update, so don't call it unless you mean business
 182          *
 183          * @since 1.25
 184          * @return bool
 185          */
 186         protected function isValidMoveTarget() {
 187                 # Is it an existing file?
 188                 if ( $this->newTitle->inNamespace( NS_FILE ) ) {
 189                         $file = wfLocalFile( $this->newTitle );
 190                         $file->load( File::READ_LATEST );
 191                         if ( $file->exists() ) {
 192                                 wfDebug( __METHOD__ . ": file exists\n" );
 193                                 return false;
 194                         }
 195                 }
 196                 # Is it a redirect with no history?
 197                 if ( !$this->newTitle->isSingleRevRedirect() ) {
 198                         wfDebug( __METHOD__ . ": not a one-rev redirect\n" );
 199                         return false;
 200                 }
 201                 # Get the article text
 202                 $rev = Revision::newFromTitle( $this->newTitle, false, Revision::READ_LATEST );
 203                 if ( !is_object( $rev ) ) {
 204                         return false;
 205                 }
 206                 $content = $rev->getContent();
 207                 # Does the redirect point to the source?
 208                 # Or is it a broken self-redirect, usually caused by namespace collisions?
 209                 $redirTitle = $content ? $content->getRedirectTarget() : null;
 210
 211                 if ( $redirTitle ) {
 212                         if ( $redirTitle->getPrefixedDBkey() !== $this->oldTitle->getPrefixedDBkey() &&
 213                                 $redirTitle->getPrefixedDBkey() !== $this->newTitle->getPrefixedDBkey() ) {
 214                                 wfDebug( __METHOD__ . ": redirect points to other page\n" );
 215                                 return false;
 216                         } else {
 217                                 return true;
 218                         }
 219                 } else {
 220                         # Fail safe (not a redirect after all. strange.)
 221                         wfDebug( __METHOD__ . ": failsafe: database says " . $this->newTitle->getPrefixedDBkey() .
 222                                 " is a redirect, but it doesn't contain a valid redirect.\n" );
 223                         return false;
 224                 }
 225         }
 226
 227         /**
 228          * @param User $user
 229          * @param string $reason
 230          * @param bool $createRedirect
 231          * @return Status
 232          */
 233         public function move( User $user, $reason, $createRedirect ) {
 234                 global $wgCategoryCollation;
 235
 236                 Hooks::run( 'TitleMove', array( $this->oldTitle, $this->newTitle, $user ) );
 237
 238                 // If it is a file, move it first.
 239                 // It is done before all other moving stuff is done because it's hard to revert.
 240                 $dbw = wfGetDB( DB_MASTER );
 241                 if ( $this->oldTitle->getNamespace() == NS_FILE ) {
 242                         $file = wfLocalFile( $this->oldTitle );
 243                         $file->load( File::READ_LATEST );
 244                         if ( $file->exists() ) {
 245                                 $status = $file->move( $this->newTitle );
 246                                 if ( !$status->isOk() ) {
 247                                         return $status;
 248                                 }
 249                         }
 250                         // Clear RepoGroup process cache
 251                         RepoGroup::singleton()->clearCache( $this->oldTitle );
 252                         RepoGroup::singleton()->clearCache( $this->newTitle ); # clear false negative cache
 253                 }
 254
 255                 $dbw->begin( __METHOD__ ); # If $file was a LocalFile, its transaction would have closed our own.
 256                 $pageid = $this->oldTitle->getArticleID( Title::GAID_FOR_UPDATE );
 257                 $protected = $this->oldTitle->isProtected();
 258
 259                 // Do the actual move
 260                 $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                         array( 'cl_sortkey_prefix', 'cl_to' ),
 269                         array( '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                                 array(
 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                                 array(
 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                                 array(
 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                                 array( 'pr_page' => $pageid ),
 310                                 __METHOD__,
 311                                 array( 'IGNORE' )
 312                         );
 313                         # Update the protection log
 314                         $log = new LogPage( 'protect' );
 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                         // @todo FIXME: $params?
 324                         $logId = $log->addEntry(
 325                                 'move_prot',
 326                                 $this->newTitle,
 327                                 $comment,
 328                                 array( $this->oldTitle->getPrefixedText() ),
 329                                 $user
 330                         );
 331
 332                         // reread inserted pr_ids for log relation
 333                         $insertedPrIds = $dbw->select(
 334                                 'page_restrictions',
 335                                 'pr_id',
 336                                 array( 'pr_page' => $redirid ),
 337                                 __METHOD__
 338                         );
 339                         $logRelationsValues = array();
 340                         foreach ( $insertedPrIds as $prid ) {
 341                                 $logRelationsValues[] = $prid->pr_id;
 342                         }
 343                         $log->addRelations( 'pr_id', $logRelationsValues, $logId );
 344                 }
 345
 346                 // Update *_from_namespace fields as needed
 347                 if ( $this->oldTitle->getNamespace() != $this->newTitle->getNamespace() ) {
 348                         $dbw->update( 'pagelinks',
 349                                 array( 'pl_from_namespace' => $this->newTitle->getNamespace() ),
 350                                 array( 'pl_from' => $pageid ),
 351                                 __METHOD__
 352                         );
 353                         $dbw->update( 'templatelinks',
 354                                 array( 'tl_from_namespace' => $this->newTitle->getNamespace() ),
 355                                 array( 'tl_from' => $pageid ),
 356                                 __METHOD__
 357                         );
 358                         $dbw->update( 'imagelinks',
 359                                 array( 'il_from_namespace' => $this->newTitle->getNamespace() ),
 360                                 array( 'il_from' => $pageid ),
 361                                 __METHOD__
 362                         );
 363                 }
 364
 365                 # Update watchlists
 366                 $oldtitle = $this->oldTitle->getDBkey();
 367                 $newtitle = $this->newTitle->getDBkey();
 368                 $oldsnamespace = MWNamespace::getSubject( $this->oldTitle->getNamespace() );
 369                 $newsnamespace = MWNamespace::getSubject( $this->newTitle->getNamespace() );
 370                 if ( $oldsnamespace != $newsnamespace || $oldtitle != $newtitle ) {
 371                         WatchedItem::duplicateEntries( $this->oldTitle, $this->newTitle );
 372                 }
 373
 374                 $dbw->commit( __METHOD__ );
 375
 376                 Hooks::run(
 377                         'TitleMoveComplete',
 378                         array( &$this->oldTitle, &$this->newTitle, &$user, $pageid, $redirid, $reason )
 379                 );
 380                 return Status::newGood();
 381         }
 382
 383         /**
 384          * Move page to a title which is either a redirect to the
 385          * source page or nonexistent
 386          *
 387          * @fixme This was basically directly moved from Title, it should be split into smaller functions
 388          * @param User $user the User doing the move
 389          * @param Title $nt The page to move to, which should be a redirect or nonexistent
 390          * @param string $reason The reason for the move
 391          * @param bool $createRedirect Whether to leave a redirect at the old title. Does not check
 392          *   if the user has the suppressredirect right
 393          * @throws MWException
 394          */
 395         private function moveToInternal( User $user, &$nt, $reason = '', $createRedirect = true ) {
 396                 global $wgContLang;
 397
 398                 if ( $nt->exists() ) {
 399                         $moveOverRedirect = true;
 400                         $logType = 'move_redir';
 401                 } else {
 402                         $moveOverRedirect = false;
 403                         $logType = 'move';
 404                 }
 405
 406                 if ( $createRedirect ) {
 407                         if ( $this->oldTitle->getNamespace() == NS_CATEGORY
 408                                 && !wfMessage( 'category-move-redirect-override' )->inContentLanguage()->isDisabled()
 409                         ) {
 410                                 $redirectContent = new WikitextContent(
 411                                         wfMessage( 'category-move-redirect-override' )
 412                                                 ->params( $nt->getPrefixedText() )->inContentLanguage()->plain() );
 413                         } else {
 414                                 $contentHandler = ContentHandler::getForTitle( $this->oldTitle );
 415                                 $redirectContent = $contentHandler->makeRedirectContent( $nt,
 416                                         wfMessage( 'move-redirect-text' )->inContentLanguage()->plain() );
 417                         }
 418
 419                         // NOTE: If this page's content model does not support redirects, $redirectContent will be null.
 420                 } else {
 421                         $redirectContent = null;
 422                 }
 423
 424                 // bug 57084: log_page should be the ID of the *moved* page
 425                 $oldid = $this->oldTitle->getArticleID();
 426                 $logTitle = clone $this->oldTitle;
 427
 428                 $logEntry = new ManualLogEntry( 'move', $logType );
 429                 $logEntry->setPerformer( $user );
 430                 $logEntry->setTarget( $logTitle );
 431                 $logEntry->setComment( $reason );
 432                 $logEntry->setParameters( array(
 433                         '4::target' => $nt->getPrefixedText(),
 434                         '5::noredir' => $redirectContent ? '0': '1',
 435                 ) );
 436
 437                 $formatter = LogFormatter::newFromEntry( $logEntry );
 438                 $formatter->setContext( RequestContext::newExtraneousContext( $this->oldTitle ) );
 439                 $comment = $formatter->getPlainActionText();
 440                 if ( $reason ) {
 441                         $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
 442                 }
 443                 # Truncate for whole multibyte characters.
 444                 $comment = $wgContLang->truncate( $comment, 255 );
 445
 446                 $dbw = wfGetDB( DB_MASTER );
 447
 448                 $oldpage = WikiPage::factory( $this->oldTitle );
 449                 $oldcountable = $oldpage->isCountable();
 450
 451                 $newpage = WikiPage::factory( $nt );
 452
 453                 if ( $moveOverRedirect ) {
 454                         $newid = $nt->getArticleID();
 455                         $newcontent = $newpage->getContent();
 456
 457                         # Delete the old redirect. We don't save it to history since
 458                         # by definition if we've got here it's rather uninteresting.
 459                         # We have to remove it so that the next step doesn't trigger
 460                         # a conflict on the unique namespace+title index...
 461                         $dbw->delete( 'page', array( 'page_id' => $newid ), __METHOD__ );
 462
 463                         $newpage->doDeleteUpdates( $newid, $newcontent );
 464                 }
 465
 466                 # Save a null revision in the page's history notifying of the move
 467                 $nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true, $user );
 468                 if ( !is_object( $nullRevision ) ) {
 469                         throw new MWException( 'No valid null revision produced in ' . __METHOD__ );
 470                 }
 471
 472                 $nullRevision->insertOn( $dbw );
 473
 474                 # Change the name of the target page:
 475                 $dbw->update( 'page',
 476                         /* SET */ array(
 477                                 'page_namespace' => $nt->getNamespace(),
 478                                 'page_title' => $nt->getDBkey(),
 479                         ),
 480                         /* WHERE */ array( 'page_id' => $oldid ),
 481                         __METHOD__
 482                 );
 483
 484                 // clean up the old title before reset article id - bug 45348
 485                 if ( !$redirectContent ) {
 486                         WikiPage::onArticleDelete( $this->oldTitle );
 487                 }
 488
 489                 $this->oldTitle->resetArticleID( 0 ); // 0 == non existing
 490                 $nt->resetArticleID( $oldid );
 491                 $newpage->loadPageData( WikiPage::READ_LOCKING ); // bug 46397
 492
 493                 $newpage->updateRevisionOn( $dbw, $nullRevision );
 494
 495                 Hooks::run( 'NewRevisionFromEditComplete',
 496                         array( $newpage, $nullRevision, $nullRevision->getParentId(), $user ) );
 497
 498                 $newpage->doEditUpdates( $nullRevision, $user,
 499                         array( 'changed' => false, 'moved' => true, 'oldcountable' => $oldcountable ) );
 500
 501                 if ( !$moveOverRedirect ) {
 502                         WikiPage::onArticleCreate( $nt );
 503                 }
 504
 505                 # Recreate the redirect, this time in the other direction.
 506                 if ( $redirectContent ) {
 507                         $redirectArticle = WikiPage::factory( $this->oldTitle );
 508                         $redirectArticle->loadFromRow( false, WikiPage::READ_LOCKING ); // bug 46397
 509                         $newid = $redirectArticle->insertOn( $dbw );
 510                         if ( $newid ) { // sanity
 511                                 $this->oldTitle->resetArticleID( $newid );
 512                                 $redirectRevision = new Revision( array(
 513                                         'title' => $this->oldTitle, // for determining the default content model
 514                                         'page' => $newid,
 515                                         'user_text' => $user->getName(),
 516                                         'user' => $user->getId(),
 517                                         'comment' => $comment,
 518                                         'content' => $redirectContent ) );
 519                                 $redirectRevision->insertOn( $dbw );
 520                                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
 521
 522                                 Hooks::run( 'NewRevisionFromEditComplete',
 523                                         array( $redirectArticle, $redirectRevision, false, $user ) );
 524
 525                                 $redirectArticle->doEditUpdates( $redirectRevision, $user, array( 'created' => true ) );
 526                         }
 527                 }
 528
 529                 # Log the move
 530                 $logid = $logEntry->insert();
 531                 $logEntry->publish( $logid );
 532         }
 533 }