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         /**
  46          * Does various sanity checks that the move is
  47          * valid. Only things based on the two titles
  48          * should be checked here.
  49          *
  50          * @return Status
  51          */
  52         public function isValidMove() {
  53                 global $wgContentHandlerUseDB;
  54                 $status = new Status();
  55
  56                 if ( $this->oldTitle->equals( $this->newTitle ) ) {
  57                         $status->fatal( 'selfmove' );
  58                 }
  59                 if ( !$this->oldTitle->isMovable() ) {
  60                         $status->fatal( 'immobile-source-namespace', $this->oldTitle->getNsText() );
  61                 }
  62                 if ( $this->newTitle->isExternal() ) {
  63                         $status->fatal( 'immobile-target-namespace-iw' );
  64                 }
  65                 if ( !$this->newTitle->isMovable() ) {
  66                         $status->fatal( 'immobile-target-namespace', $this->newTitle->getNsText() );
  67                 }
  68
  69                 $oldid = $this->oldTitle->getArticleID();
  70
  71                 if ( strlen( $this->newTitle->getDBkey() ) < 1 ) {
  72                         $errors[] = array( 'articleexists' );
  73                 }
  74                 if (
  75                         ( $this->oldTitle->getDBkey() == '' ) ||
  76                         ( !$oldid ) ||
  77                         ( $this->newTitle->getDBkey() == '' )
  78                 ) {
  79                         $errors[] = array( 'badarticleerror' );
  80                 }
  81
  82                 // Content model checks
  83                 if ( !$wgContentHandlerUseDB &&
  84                         $this->oldTitle->getContentModel() !== $this->newTitle->getContentModel() ) {
  85                         // can't move a page if that would change the page's content model
  86                         $status->fatal(
  87                                 'bad-target-model',
  88                                 ContentHandler::getLocalizedName( $this->oldTitle->getContentModel() ),
  89                                 ContentHandler::getLocalizedName( $this->newTitle->getContentModel() )
  90                         );
  91                 }
  92
  93                 // Image-specific checks
  94                 if ( $this->oldTitle->inNamespace( NS_FILE ) ) {
  95                         $status->merge( $this->isValidFileMove() );
  96                 }
  97
  98                 if ( $this->newTitle->inNamespace( NS_FILE ) && !$this->oldTitle->inNamespace( NS_FILE ) ) {
  99                         $status->fatal( 'nonfile-cannot-move-to-file' );
 100                 }
 101
 102                 return $status;
 103         }
 104
 105         /**
 106          * Sanity checks for when a file is being moved
 107          *
 108          * @return Status
 109          */
 110         protected function isValidFileMove() {
 111                 $status = new Status();
 112                 $file = wfLocalFile( $this->oldTitle );
 113                 if ( $file->exists() ) {
 114                         if ( $this->newTitle->getText() != wfStripIllegalFilenameChars( $this->newTitle->getText() ) ) {
 115                                 $status->fatal( 'imageinvalidfilename' );
 116                         }
 117                         if ( !File::checkExtensionCompatibility( $file, $this->newTitle->getDBkey() ) ) {
 118                                 $status->fatal( 'imagetypemismatch' );
 119                         }
 120                 }
 121
 122                 if ( !$this->newTitle->inNamespace( NS_FILE ) ) {
 123                         $status->fatal( 'imagenocrossnamespace' );
 124                 }
 125
 126                 return $status;
 127         }
 128
 129         /**
 130          * @param User $user
 131          * @param string $reason
 132          * @param bool $createRedirect
 133          * @return Status
 134          */
 135         public function move( User $user, $reason, $createRedirect ) {
 136                 global $wgCategoryCollation;
 137
 138                 // If it is a file, move it first.
 139                 // It is done before all other moving stuff is done because it's hard to revert.
 140                 $dbw = wfGetDB( DB_MASTER );
 141                 if ( $this->oldTitle->getNamespace() == NS_FILE ) {
 142                         $file = wfLocalFile( $this->oldTitle );
 143                         if ( $file->exists() ) {
 144                                 $status = $file->move( $this->newTitle );
 145                                 if ( !$status->isOk() ) {
 146                                         return $status;
 147                                 }
 148                         }
 149                         // Clear RepoGroup process cache
 150                         RepoGroup::singleton()->clearCache( $this->oldTitle );
 151                         RepoGroup::singleton()->clearCache( $this->newTitle ); # clear false negative cache
 152                 }
 153
 154                 $dbw->begin( __METHOD__ ); # If $file was a LocalFile, its transaction would have closed our own.
 155                 $pageid = $this->oldTitle->getArticleID( Title::GAID_FOR_UPDATE );
 156                 $protected = $this->oldTitle->isProtected();
 157
 158                 // Do the actual move
 159                 $this->moveToInternal( $user, $this->newTitle, $reason, $createRedirect );
 160
 161                 // Refresh the sortkey for this row.  Be careful to avoid resetting
 162                 // cl_timestamp, which may disturb time-based lists on some sites.
 163                 // @todo This block should be killed, it's duplicating code
 164                 // from LinksUpdate::getCategoryInsertions() and friends.
 165                 $prefixes = $dbw->select(
 166                         'categorylinks',
 167                         array( 'cl_sortkey_prefix', 'cl_to' ),
 168                         array( 'cl_from' => $pageid ),
 169                         __METHOD__
 170                 );
 171                 if ( $this->newTitle->getNamespace() == NS_CATEGORY ) {
 172                         $type = 'subcat';
 173                 } elseif ( $this->newTitle->getNamespace() == NS_FILE ) {
 174                         $type = 'file';
 175                 } else {
 176                         $type = 'page';
 177                 }
 178                 foreach ( $prefixes as $prefixRow ) {
 179                         $prefix = $prefixRow->cl_sortkey_prefix;
 180                         $catTo = $prefixRow->cl_to;
 181                         $dbw->update( 'categorylinks',
 182                                 array(
 183                                         'cl_sortkey' => Collation::singleton()->getSortKey(
 184                                                         $this->newTitle->getCategorySortkey( $prefix ) ),
 185                                         'cl_collation' => $wgCategoryCollation,
 186                                         'cl_type' => $type,
 187                                         'cl_timestamp=cl_timestamp' ),
 188                                 array(
 189                                         'cl_from' => $pageid,
 190                                         'cl_to' => $catTo ),
 191                                 __METHOD__
 192                         );
 193                 }
 194
 195                 $redirid = $this->oldTitle->getArticleID();
 196
 197                 if ( $protected ) {
 198                         # Protect the redirect title as the title used to be...
 199                         $dbw->insertSelect( 'page_restrictions', 'page_restrictions',
 200                                 array(
 201                                         'pr_page' => $redirid,
 202                                         'pr_type' => 'pr_type',
 203                                         'pr_level' => 'pr_level',
 204                                         'pr_cascade' => 'pr_cascade',
 205                                         'pr_user' => 'pr_user',
 206                                         'pr_expiry' => 'pr_expiry'
 207                                 ),
 208                                 array( 'pr_page' => $pageid ),
 209                                 __METHOD__,
 210                                 array( 'IGNORE' )
 211                         );
 212                         # Update the protection log
 213                         $log = new LogPage( 'protect' );
 214                         $comment = wfMessage(
 215                                 'prot_1movedto2',
 216                                 $this->oldTitle->getPrefixedText(),
 217                                 $this->newTitle->getPrefixedText()
 218                         )->inContentLanguage()->text();
 219                         if ( $reason ) {
 220                                 $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
 221                         }
 222                         // @todo FIXME: $params?
 223                         $logId = $log->addEntry(
 224                                 'move_prot',
 225                                 $this->newTitle,
 226                                 $comment,
 227                                 array( $this->oldTitle->getPrefixedText() ),
 228                                 $user
 229                         );
 230
 231                         // reread inserted pr_ids for log relation
 232                         $insertedPrIds = $dbw->select(
 233                                 'page_restrictions',
 234                                 'pr_id',
 235                                 array( 'pr_page' => $redirid ),
 236                                 __METHOD__
 237                         );
 238                         $logRelationsValues = array();
 239                         foreach ( $insertedPrIds as $prid ) {
 240                                 $logRelationsValues[] = $prid->pr_id;
 241                         }
 242                         $log->addRelations( 'pr_id', $logRelationsValues, $logId );
 243                 }
 244
 245                 // Update *_from_namespace fields as needed
 246                 if ( $this->oldTitle->getNamespace() != $this->newTitle->getNamespace() ) {
 247                         $dbw->update( 'pagelinks',
 248                                 array( 'pl_from_namespace' => $this->newTitle->getNamespace() ),
 249                                 array( 'pl_from' => $pageid ),
 250                                 __METHOD__
 251                         );
 252                         $dbw->update( 'templatelinks',
 253                                 array( 'tl_from_namespace' => $this->newTitle->getNamespace() ),
 254                                 array( 'tl_from' => $pageid ),
 255                                 __METHOD__
 256                         );
 257                         $dbw->update( 'imagelinks',
 258                                 array( 'il_from_namespace' => $this->newTitle->getNamespace() ),
 259                                 array( 'il_from' => $pageid ),
 260                                 __METHOD__
 261                         );
 262                 }
 263
 264                 # Update watchlists
 265                 $oldtitle = $this->oldTitle->getDBkey();
 266                 $newtitle = $this->newTitle->getDBkey();
 267                 $oldsnamespace = MWNamespace::getSubject( $this->oldTitle->getNamespace() );
 268                 $newsnamespace = MWNamespace::getSubject( $this->newTitle->getNamespace() );
 269                 if ( $oldsnamespace != $newsnamespace || $oldtitle != $newtitle ) {
 270                         WatchedItem::duplicateEntries( $this->oldTitle, $this->newTitle );
 271                 }
 272
 273                 $dbw->commit( __METHOD__ );
 274
 275                 wfRunHooks( 'TitleMoveComplete', array( &$this->oldTitle, &$this->newTitle, &$user, $pageid, $redirid, $reason ) );
 276                 return Status::newGood();
 277
 278         }
 279
 280         /**
 281          * Move page to a title which is either a redirect to the
 282          * source page or nonexistent
 283          *
 284          * @fixme This was basically directly moved from Title, it should be split into smaller functions
 285          * @param User $user the User doing the move
 286          * @param Title $nt The page to move to, which should be a redirect or nonexistent
 287          * @param string $reason The reason for the move
 288          * @param bool $createRedirect Whether to leave a redirect at the old title. Does not check
 289          *   if the user has the suppressredirect right
 290          * @throws MWException
 291          */
 292         private function moveToInternal( User $user, &$nt, $reason = '', $createRedirect = true ) {
 293                 global $wgContLang;
 294
 295                 if ( $nt->exists() ) {
 296                         $moveOverRedirect = true;
 297                         $logType = 'move_redir';
 298                 } else {
 299                         $moveOverRedirect = false;
 300                         $logType = 'move';
 301                 }
 302
 303                 if ( $createRedirect ) {
 304                         if ( $this->oldTitle->getNamespace() == NS_CATEGORY
 305                                 && !wfMessage( 'category-move-redirect-override' )->inContentLanguage()->isDisabled()
 306                         ) {
 307                                 $redirectContent = new WikitextContent(
 308                                         wfMessage( 'category-move-redirect-override' )
 309                                                 ->params( $nt->getPrefixedText() )->inContentLanguage()->plain() );
 310                         } else {
 311                                 $contentHandler = ContentHandler::getForTitle( $this->oldTitle );
 312                                 $redirectContent = $contentHandler->makeRedirectContent( $nt,
 313                                         wfMessage( 'move-redirect-text' )->inContentLanguage()->plain() );
 314                         }
 315
 316                         // NOTE: If this page's content model does not support redirects, $redirectContent will be null.
 317                 } else {
 318                         $redirectContent = null;
 319                 }
 320
 321                 // bug 57084: log_page should be the ID of the *moved* page
 322                 $oldid = $this->oldTitle->getArticleID();
 323                 $logTitle = clone $this->oldTitle;
 324
 325                 $logEntry = new ManualLogEntry( 'move', $logType );
 326                 $logEntry->setPerformer( $user );
 327                 $logEntry->setTarget( $logTitle );
 328                 $logEntry->setComment( $reason );
 329                 $logEntry->setParameters( array(
 330                         '4::target' => $nt->getPrefixedText(),
 331                         '5::noredir' => $redirectContent ? '0': '1',
 332                 ) );
 333
 334                 $formatter = LogFormatter::newFromEntry( $logEntry );
 335                 $formatter->setContext( RequestContext::newExtraneousContext( $this->oldTitle ) );
 336                 $comment = $formatter->getPlainActionText();
 337                 if ( $reason ) {
 338                         $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
 339                 }
 340                 # Truncate for whole multibyte characters.
 341                 $comment = $wgContLang->truncate( $comment, 255 );
 342
 343                 $dbw = wfGetDB( DB_MASTER );
 344
 345                 $newpage = WikiPage::factory( $nt );
 346
 347                 if ( $moveOverRedirect ) {
 348                         $newid = $nt->getArticleID();
 349                         $newcontent = $newpage->getContent();
 350
 351                         # Delete the old redirect. We don't save it to history since
 352                         # by definition if we've got here it's rather uninteresting.
 353                         # We have to remove it so that the next step doesn't trigger
 354                         # a conflict on the unique namespace+title index...
 355                         $dbw->delete( 'page', array( 'page_id' => $newid ), __METHOD__ );
 356
 357                         $newpage->doDeleteUpdates( $newid, $newcontent );
 358                 }
 359
 360                 # Save a null revision in the page's history notifying of the move
 361                 $nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true, $user );
 362                 if ( !is_object( $nullRevision ) ) {
 363                         throw new MWException( 'No valid null revision produced in ' . __METHOD__ );
 364                 }
 365
 366                 $nullRevision->insertOn( $dbw );
 367
 368                 # Change the name of the target page:
 369                 $dbw->update( 'page',
 370                         /* SET */ array(
 371                                 'page_namespace' => $nt->getNamespace(),
 372                                 'page_title' => $nt->getDBkey(),
 373                         ),
 374                         /* WHERE */ array( 'page_id' => $oldid ),
 375                         __METHOD__
 376                 );
 377
 378                 // clean up the old title before reset article id - bug 45348
 379                 if ( !$redirectContent ) {
 380                         WikiPage::onArticleDelete( $this->oldTitle );
 381                 }
 382
 383                 $this->oldTitle->resetArticleID( 0 ); // 0 == non existing
 384                 $nt->resetArticleID( $oldid );
 385                 $newpage->loadPageData( WikiPage::READ_LOCKING ); // bug 46397
 386
 387                 $newpage->updateRevisionOn( $dbw, $nullRevision );
 388
 389                 wfRunHooks( 'NewRevisionFromEditComplete',
 390                         array( $newpage, $nullRevision, $nullRevision->getParentId(), $user ) );
 391
 392                 $newpage->doEditUpdates( $nullRevision, $user, array( 'changed' => false ) );
 393
 394                 if ( !$moveOverRedirect ) {
 395                         WikiPage::onArticleCreate( $nt );
 396                 }
 397
 398                 # Recreate the redirect, this time in the other direction.
 399                 if ( $redirectContent ) {
 400                         $redirectArticle = WikiPage::factory( $this->oldTitle );
 401                         $redirectArticle->loadFromRow( false, WikiPage::READ_LOCKING ); // bug 46397
 402                         $newid = $redirectArticle->insertOn( $dbw );
 403                         if ( $newid ) { // sanity
 404                                 $this->oldTitle->resetArticleID( $newid );
 405                                 $redirectRevision = new Revision( array(
 406                                         'title' => $this->oldTitle, // for determining the default content model
 407                                         'page' => $newid,
 408                                         'user_text' => $user->getName(),
 409                                         'user' => $user->getId(),
 410                                         'comment' => $comment,
 411                                         'content' => $redirectContent ) );
 412                                 $redirectRevision->insertOn( $dbw );
 413                                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
 414
 415                                 wfRunHooks( 'NewRevisionFromEditComplete',
 416                                         array( $redirectArticle, $redirectRevision, false, $user ) );
 417
 418                                 $redirectArticle->doEditUpdates( $redirectRevision, $user, array( 'created' => true ) );
 419                         }
 420                 }
 421
 422                 # Log the move
 423                 $logid = $logEntry->insert();
 424                 $logEntry->publish( $logid );
 425         }
 426
 427 }