includes/specials/SpecialMovepage.php

   1 <?php
   2 /**
   3  * Implements Special:Movepage
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * A special page that allows users to change page titles
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class MovePageForm extends UnlistedSpecialPage {
  30         /** @var Title */
  31         protected $oldTitle = null;
  32
  33         /** @var Title */
  34         protected $newTitle;
  35
  36         /** @var string Text input */
  37         protected $reason;
  38
  39         // Checks
  40
  41         /** @var bool */
  42         protected $moveTalk;
  43
  44         /** @var bool */
  45         protected $deleteAndMove;
  46
  47         /** @var bool */
  48         protected $moveSubpages;
  49
  50         /** @var bool */
  51         protected $fixRedirects;
  52
  53         /** @var bool */
  54         protected $leaveRedirect;
  55
  56         /** @var bool */
  57         protected $moveOverShared;
  58
  59         private $watch = false;
  60
  61         public function __construct() {
  62                 parent::__construct( 'Movepage' );
  63         }
  64
  65         public function doesWrites() {
  66                 return true;
  67         }
  68
  69         public function execute( $par ) {
  70                 $this->useTransactionalTimeLimit();
  71
  72                 $this->checkReadOnly();
  73
  74                 $this->setHeaders();
  75                 $this->outputHeader();
  76
  77                 $request = $this->getRequest();
  78                 $target = $par ?? $request->getVal( 'target' );
  79
  80                 // Yes, the use of getVal() and getText() is wanted, see T22365
  81
  82                 $oldTitleText = $request->getVal( 'wpOldTitle', $target );
  83                 $this->oldTitle = Title::newFromText( $oldTitleText );
  84
  85                 if ( !$this->oldTitle ) {
  86                         // Either oldTitle wasn't passed, or newFromText returned null
  87                         throw new ErrorPageError( 'notargettitle', 'notargettext' );
  88                 }
  89                 if ( !$this->oldTitle->exists() ) {
  90                         throw new ErrorPageError( 'nopagetitle', 'nopagetext' );
  91                 }
  92
  93                 $newTitleTextMain = $request->getText( 'wpNewTitleMain' );
  94                 $newTitleTextNs = $request->getInt( 'wpNewTitleNs', $this->oldTitle->getNamespace() );
  95                 // Backwards compatibility for forms submitting here from other sources
  96                 // which is more common than it should be..
  97                 $newTitleText_bc = $request->getText( 'wpNewTitle' );
  98                 $this->newTitle = strlen( $newTitleText_bc ) > 0
  99                         ? Title::newFromText( $newTitleText_bc )
 100                         : Title::makeTitleSafe( $newTitleTextNs, $newTitleTextMain );
 101
 102                 $user = $this->getUser();
 103
 104                 # Check rights
 105                 $permErrors = $this->oldTitle->getUserPermissionsErrors( 'move', $user );
 106                 if ( count( $permErrors ) ) {
 107                         // Auto-block user's IP if the account was "hard" blocked
 108                         DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 109                                 $user->spreadAnyEditBlock();
 110                         } );
 111                         throw new PermissionsError( 'move', $permErrors );
 112                 }
 113
 114                 $def = !$request->wasPosted();
 115
 116                 $this->reason = $request->getText( 'wpReason' );
 117                 $this->moveTalk = $request->getBool( 'wpMovetalk', $def );
 118                 $this->fixRedirects = $request->getBool( 'wpFixRedirects', $def );
 119                 $this->leaveRedirect = $request->getBool( 'wpLeaveRedirect', $def );
 120                 $this->moveSubpages = $request->getBool( 'wpMovesubpages' );
 121                 $this->deleteAndMove = $request->getBool( 'wpDeleteAndMove' );
 122                 $this->moveOverShared = $request->getBool( 'wpMoveOverSharedFile' );
 123                 $this->watch = $request->getCheck( 'wpWatch' ) && $user->isLoggedIn();
 124
 125                 if ( $request->getVal( 'action' ) == 'submit' && $request->wasPosted()
 126                         && $user->matchEditToken( $request->getVal( 'wpEditToken' ) )
 127                 ) {
 128                         $this->doSubmit();
 129                 } else {
 130                         $this->showForm( [] );
 131                 }
 132         }
 133
 134         /**
 135          * Show the form
 136          *
 137          * @param array $err Error messages. Each item is an error message.
 138          *    It may either be a string message name or array message name and
 139          *    parameters, like the second argument to OutputPage::wrapWikiMsg().
 140          * @param bool $isPermError Whether the error message is about user permissions.
 141          */
 142         function showForm( $err, $isPermError = false ) {
 143                 $this->getSkin()->setRelevantTitle( $this->oldTitle );
 144
 145                 $out = $this->getOutput();
 146                 $out->setPageTitle( $this->msg( 'move-page', $this->oldTitle->getPrefixedText() ) );
 147                 $out->addModuleStyles( 'mediawiki.special' );
 148                 $out->addModules( 'mediawiki.special.movePage' );
 149                 $this->addHelpLink( 'Help:Moving a page' );
 150
 151                 $out->addWikiMsg( $this->getConfig()->get( 'FixDoubleRedirects' ) ?
 152                         'movepagetext' :
 153                         'movepagetext-noredirectfixer'
 154                 );
 155
 156                 if ( $this->oldTitle->getNamespace() == NS_USER && !$this->oldTitle->isSubpage() ) {
 157                         $out->wrapWikiMsg(
 158                                 "<div class=\"warningbox mw-moveuserpage-warning\">\n$1\n</div>",
 159                                 'moveuserpage-warning'
 160                         );
 161                 } elseif ( $this->oldTitle->getNamespace() == NS_CATEGORY ) {
 162                         $out->wrapWikiMsg(
 163                                 "<div class=\"warningbox mw-movecategorypage-warning\">\n$1\n</div>",
 164                                 'movecategorypage-warning'
 165                         );
 166                 }
 167
 168                 $deleteAndMove = false;
 169                 $moveOverShared = false;
 170
 171                 $newTitle = $this->newTitle;
 172
 173                 if ( !$newTitle ) {
 174                         # Show the current title as a default
 175                         # when the form is first opened.
 176                         $newTitle = $this->oldTitle;
 177                 } elseif ( !count( $err ) ) {
 178                         # If a title was supplied, probably from the move log revert
 179                         # link, check for validity. We can then show some diagnostic
 180                         # information and save a click.
 181                         $newerr = $this->oldTitle->isValidMoveOperation( $newTitle );
 182                         if ( is_array( $newerr ) ) {
 183                                 $err = $newerr;
 184                         }
 185                 }
 186
 187                 $user = $this->getUser();
 188
 189                 if ( count( $err ) == 1 && isset( $err[0][0] ) && $err[0][0] == 'articleexists'
 190                         && $newTitle->quickUserCan( 'delete', $user )
 191                 ) {
 192                         $out->wrapWikiMsg(
 193                                 "<div class='warningbox'>\n$1\n</div>\n",
 194                                 [ 'delete_and_move_text', $newTitle->getPrefixedText() ]
 195                         );
 196                         $deleteAndMove = true;
 197                         $err = [];
 198                 }
 199
 200                 if ( count( $err ) == 1 && isset( $err[0][0] ) && $err[0][0] == 'file-exists-sharedrepo'
 201                         && $user->isAllowed( 'reupload-shared' )
 202                 ) {
 203                         $out->wrapWikiMsg(
 204                                 "<div class='warningbox'>\n$1\n</div>\n",
 205                                 [
 206                                         'move-over-sharedrepo',
 207                                         $newTitle->getPrefixedText()
 208                                 ]
 209                         );
 210                         $moveOverShared = true;
 211                         $err = [];
 212                 }
 213
 214                 $oldTalk = $this->oldTitle->getTalkPage();
 215                 $oldTitleSubpages = $this->oldTitle->hasSubpages();
 216                 $oldTitleTalkSubpages = $this->oldTitle->getTalkPage()->hasSubpages();
 217
 218                 $canMoveSubpage = ( $oldTitleSubpages || $oldTitleTalkSubpages ) &&
 219                         !count( $this->oldTitle->getUserPermissionsErrors( 'move-subpages', $user ) );
 220
 221                 # We also want to be able to move assoc. subpage talk-pages even if base page
 222                 # has no associated talk page, so || with $oldTitleTalkSubpages.
 223                 $considerTalk = !$this->oldTitle->isTalkPage() &&
 224                         ( $oldTalk->exists()
 225                                 || ( $oldTitleTalkSubpages && $canMoveSubpage ) );
 226
 227                 $dbr = wfGetDB( DB_REPLICA );
 228                 if ( $this->getConfig()->get( 'FixDoubleRedirects' ) ) {
 229                         $hasRedirects = $dbr->selectField( 'redirect', '1',
 230                                 [
 231                                         'rd_namespace' => $this->oldTitle->getNamespace(),
 232                                         'rd_title' => $this->oldTitle->getDBkey(),
 233                                 ], __METHOD__ );
 234                 } else {
 235                         $hasRedirects = false;
 236                 }
 237
 238                 if ( count( $err ) ) {
 239                         if ( $isPermError ) {
 240                                 $action_desc = $this->msg( 'action-move' )->plain();
 241                                 $errMsgHtml = $this->msg( 'permissionserrorstext-withaction',
 242                                         count( $err ), $action_desc )->parseAsBlock();
 243                         } else {
 244                                 $errMsgHtml = $this->msg( 'cannotmove', count( $err ) )->parseAsBlock();
 245                         }
 246
 247                         if ( count( $err ) == 1 ) {
 248                                 $errMsg = $err[0];
 249                                 $errMsgName = array_shift( $errMsg );
 250
 251                                 if ( $errMsgName == 'hookaborted' ) {
 252                                         $errMsgHtml .= "<p>{$errMsg[0]}</p>\n";
 253                                 } else {
 254                                         $errMsgHtml .= $this->msg( $errMsgName, $errMsg )->parseAsBlock();
 255                                 }
 256                         } else {
 257                                 $errStr = [];
 258
 259                                 foreach ( $err as $errMsg ) {
 260                                         if ( $errMsg[0] == 'hookaborted' ) {
 261                                                 $errStr[] = $errMsg[1];
 262                                         } else {
 263                                                 $errMsgName = array_shift( $errMsg );
 264                                                 $errStr[] = $this->msg( $errMsgName, $errMsg )->parse();
 265                                         }
 266                                 }
 267
 268                                 $errMsgHtml .= '<ul><li>' . implode( "</li>\n<li>", $errStr ) . "</li></ul>\n";
 269                         }
 270                         $out->addHTML( Html::errorBox( $errMsgHtml ) );
 271                 }
 272
 273                 if ( $this->oldTitle->isProtected( 'move' ) ) {
 274                         # Is the title semi-protected?
 275                         if ( $this->oldTitle->isSemiProtected( 'move' ) ) {
 276                                 $noticeMsg = 'semiprotectedpagemovewarning';
 277                                 $classes[] = 'mw-textarea-sprotected';
 278                         } else {
 279                                 # Then it must be protected based on static groups (regular)
 280                                 $noticeMsg = 'protectedpagemovewarning';
 281                                 $classes[] = 'mw-textarea-protected';
 282                         }
 283                         $out->addHTML( "<div class='mw-warning-with-logexcerpt'>\n" );
 284                         $out->addWikiMsg( $noticeMsg );
 285                         LogEventsList::showLogExtract(
 286                                 $out,
 287                                 'protect',
 288                                 $this->oldTitle,
 289                                 '',
 290                                 [ 'lim' => 1 ]
 291                         );
 292                         $out->addHTML( "</div>\n" );
 293                 }
 294
 295                 // Length limit for wpReason and wpNewTitleMain is enforced in the
 296                 // mediawiki.special.movePage module
 297
 298                 $immovableNamespaces = [];
 299                 foreach ( array_keys( $this->getLanguage()->getNamespaces() ) as $nsId ) {
 300                         if ( !MWNamespace::isMovable( $nsId ) ) {
 301                                 $immovableNamespaces[] = $nsId;
 302                         }
 303                 }
 304
 305                 $handler = ContentHandler::getForTitle( $this->oldTitle );
 306
 307                 $out->enableOOUI();
 308                 $fields = [];
 309
 310                 $fields[] = new OOUI\FieldLayout(
 311                         new MediaWiki\Widget\ComplexTitleInputWidget( [
 312                                 'id' => 'wpNewTitle',
 313                                 'namespace' => [
 314                                         'id' => 'wpNewTitleNs',
 315                                         'name' => 'wpNewTitleNs',
 316                                         'value' => $newTitle->getNamespace(),
 317                                         'exclude' => $immovableNamespaces,
 318                                 ],
 319                                 'title' => [
 320                                         'id' => 'wpNewTitleMain',
 321                                         'name' => 'wpNewTitleMain',
 322                                         'value' => $newTitle->getText(),
 323                                         // Inappropriate, since we're expecting the user to input a non-existent page's title
 324                                         'suggestions' => false,
 325                                 ],
 326                                 'infusable' => true,
 327                         ] ),
 328                         [
 329                                 'label' => $this->msg( 'newtitle' )->text(),
 330                                 'align' => 'top',
 331                         ]
 332                 );
 333
 334                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 335                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 336                 // Unicode codepoints.
 337                 $fields[] = new OOUI\FieldLayout(
 338                         new OOUI\TextInputWidget( [
 339                                 'name' => 'wpReason',
 340                                 'id' => 'wpReason',
 341                                 'maxLength' => CommentStore::COMMENT_CHARACTER_LIMIT,
 342                                 'infusable' => true,
 343                                 'value' => $this->reason,
 344                         ] ),
 345                         [
 346                                 'label' => $this->msg( 'movereason' )->text(),
 347                                 'align' => 'top',
 348                         ]
 349                 );
 350
 351                 if ( $considerTalk ) {
 352                         $fields[] = new OOUI\FieldLayout(
 353                                 new OOUI\CheckboxInputWidget( [
 354                                         'name' => 'wpMovetalk',
 355                                         'id' => 'wpMovetalk',
 356                                         'value' => '1',
 357                                         'selected' => $this->moveTalk,
 358                                 ] ),
 359                                 [
 360                                         'label' => $this->msg( 'movetalk' )->text(),
 361                                         'help' => new OOUI\HtmlSnippet( $this->msg( 'movepagetalktext' )->parseAsBlock() ),
 362                                         'helpInline' => true,
 363                                         'align' => 'inline',
 364                                         'id' => 'wpMovetalk-field',
 365                                 ]
 366                         );
 367                 }
 368
 369                 if ( $user->isAllowed( 'suppressredirect' ) ) {
 370                         if ( $handler->supportsRedirects() ) {
 371                                 $isChecked = $this->leaveRedirect;
 372                                 $isDisabled = false;
 373                         } else {
 374                                 $isChecked = false;
 375                                 $isDisabled = true;
 376                         }
 377                         $fields[] = new OOUI\FieldLayout(
 378                                 new OOUI\CheckboxInputWidget( [
 379                                         'name' => 'wpLeaveRedirect',
 380                                         'id' => 'wpLeaveRedirect',
 381                                         'value' => '1',
 382                                         'selected' => $isChecked,
 383                                         'disabled' => $isDisabled,
 384                                 ] ),
 385                                 [
 386                                         'label' => $this->msg( 'move-leave-redirect' )->text(),
 387                                         'align' => 'inline',
 388                                 ]
 389                         );
 390                 }
 391
 392                 if ( $hasRedirects ) {
 393                         $fields[] = new OOUI\FieldLayout(
 394                                 new OOUI\CheckboxInputWidget( [
 395                                         'name' => 'wpFixRedirects',
 396                                         'id' => 'wpFixRedirects',
 397                                         'value' => '1',
 398                                         'selected' => $this->fixRedirects,
 399                                 ] ),
 400                                 [
 401                                         'label' => $this->msg( 'fix-double-redirects' )->text(),
 402                                         'align' => 'inline',
 403                                 ]
 404                         );
 405                 }
 406
 407                 if ( $canMoveSubpage ) {
 408                         $maximumMovedPages = $this->getConfig()->get( 'MaximumMovedPages' );
 409                         $fields[] = new OOUI\FieldLayout(
 410                                 new OOUI\CheckboxInputWidget( [
 411                                         'name' => 'wpMovesubpages',
 412                                         'id' => 'wpMovesubpages',
 413                                         'value' => '1',
 414                                         # Don't check the box if we only have talk subpages to
 415                                         # move and we aren't moving the talk page.
 416                                         'selected' => $this->moveSubpages && ( $this->oldTitle->hasSubpages() || $this->moveTalk ),
 417                                 ] ),
 418                                 [
 419                                         'label' => new OOUI\HtmlSnippet(
 420                                                 $this->msg(
 421                                                         ( $this->oldTitle->hasSubpages()
 422                                                                 ? 'move-subpages'
 423                                                                 : 'move-talk-subpages' )
 424                                                 )->numParams( $maximumMovedPages )->params( $maximumMovedPages )->parse()
 425                                         ),
 426                                         'align' => 'inline',
 427                                 ]
 428                         );
 429                 }
 430
 431                 # Don't allow watching if user is not logged in
 432                 if ( $user->isLoggedIn() ) {
 433                         $watchChecked = $user->isLoggedIn() && ( $this->watch || $user->getBoolOption( 'watchmoves' )
 434                                 || $user->isWatched( $this->oldTitle ) );
 435                         $fields[] = new OOUI\FieldLayout(
 436                                 new OOUI\CheckboxInputWidget( [
 437                                         'name' => 'wpWatch',
 438                                         'id' => 'watch', # ew
 439                                         'value' => '1',
 440                                         'selected' => $watchChecked,
 441                                 ] ),
 442                                 [
 443                                         'label' => $this->msg( 'move-watch' )->text(),
 444                                         'align' => 'inline',
 445                                 ]
 446                         );
 447                 }
 448
 449                 $hiddenFields = '';
 450                 if ( $moveOverShared ) {
 451                         $hiddenFields .= Html::hidden( 'wpMoveOverSharedFile', '1' );
 452                 }
 453
 454                 if ( $deleteAndMove ) {
 455                         $fields[] = new OOUI\FieldLayout(
 456                                 new OOUI\CheckboxInputWidget( [
 457                                         'name' => 'wpDeleteAndMove',
 458                                         'id' => 'wpDeleteAndMove',
 459                                         'value' => '1',
 460                                 ] ),
 461                                 [
 462                                         'label' => $this->msg( 'delete_and_move_confirm' )->text(),
 463                                         'align' => 'inline',
 464                                 ]
 465                         );
 466                 }
 467
 468                 $fields[] = new OOUI\FieldLayout(
 469                         new OOUI\ButtonInputWidget( [
 470                                 'name' => 'wpMove',
 471                                 'value' => $this->msg( 'movepagebtn' )->text(),
 472                                 'label' => $this->msg( 'movepagebtn' )->text(),
 473                                 'flags' => [ 'primary', 'progressive' ],
 474                                 'type' => 'submit',
 475                         ] ),
 476                         [
 477                                 'align' => 'top',
 478                         ]
 479                 );
 480
 481                 $fieldset = new OOUI\FieldsetLayout( [
 482                         'label' => $this->msg( 'move-page-legend' )->text(),
 483                         'id' => 'mw-movepage-table',
 484                         'items' => $fields,
 485                 ] );
 486
 487                 $form = new OOUI\FormLayout( [
 488                         'method' => 'post',
 489                         'action' => $this->getPageTitle()->getLocalURL( 'action=submit' ),
 490                         'id' => 'movepage',
 491                 ] );
 492                 $form->appendContent(
 493                         $fieldset,
 494                         new OOUI\HtmlSnippet(
 495                                 $hiddenFields .
 496                                 Html::hidden( 'wpOldTitle', $this->oldTitle->getPrefixedText() ) .
 497                                 Html::hidden( 'wpEditToken', $user->getEditToken() )
 498                         )
 499                 );
 500
 501                 $out->addHTML(
 502                         new OOUI\PanelLayout( [
 503                                 'classes' => [ 'movepage-wrapper' ],
 504                                 'expanded' => false,
 505                                 'padded' => true,
 506                                 'framed' => true,
 507                                 'content' => $form,
 508                         ] )
 509                 );
 510
 511                 $this->showLogFragment( $this->oldTitle );
 512                 $this->showSubpages( $this->oldTitle );
 513         }
 514
 515         function doSubmit() {
 516                 $user = $this->getUser();
 517
 518                 if ( $user->pingLimiter( 'move' ) ) {
 519                         throw new ThrottledError;
 520                 }
 521
 522                 $ot = $this->oldTitle;
 523                 $nt = $this->newTitle;
 524
 525                 # don't allow moving to pages with # in
 526                 if ( !$nt || $nt->hasFragment() ) {
 527                         $this->showForm( [ [ 'badtitletext' ] ] );
 528
 529                         return;
 530                 }
 531
 532                 # Show a warning if the target file exists on a shared repo
 533                 if ( $nt->getNamespace() == NS_FILE
 534                         && !( $this->moveOverShared && $user->isAllowed( 'reupload-shared' ) )
 535                         && !RepoGroup::singleton()->getLocalRepo()->findFile( $nt )
 536                         && wfFindFile( $nt )
 537                 ) {
 538                         $this->showForm( [ [ 'file-exists-sharedrepo' ] ] );
 539
 540                         return;
 541                 }
 542
 543                 # Delete to make way if requested
 544                 if ( $this->deleteAndMove ) {
 545                         $permErrors = $nt->getUserPermissionsErrors( 'delete', $user );
 546                         if ( count( $permErrors ) ) {
 547                                 # Only show the first error
 548                                 $this->showForm( $permErrors, true );
 549
 550                                 return;
 551                         }
 552
 553                         $page = WikiPage::factory( $nt );
 554
 555                         // Small safety margin to guard against concurrent edits
 556                         if ( $page->isBatchedDelete( 5 ) ) {
 557                                 $this->showForm( [ [ 'movepage-delete-first' ] ] );
 558
 559                                 return;
 560                         }
 561
 562                         $reason = $this->msg( 'delete_and_move_reason', $ot )->inContentLanguage()->text();
 563
 564                         // Delete an associated image if there is
 565                         if ( $nt->getNamespace() == NS_FILE ) {
 566                                 $file = wfLocalFile( $nt );
 567                                 $file->load( File::READ_LATEST );
 568                                 if ( $file->exists() ) {
 569                                         $file->delete( $reason, false, $user );
 570                                 }
 571                         }
 572
 573                         $error = ''; // passed by ref
 574                         $deleteStatus = $page->doDeleteArticleReal( $reason, false, 0, true, $error, $user );
 575                         if ( !$deleteStatus->isGood() ) {
 576                                 $this->showForm( $deleteStatus->getErrorsArray() );
 577
 578                                 return;
 579                         }
 580                 }
 581
 582                 $handler = ContentHandler::getForTitle( $ot );
 583
 584                 if ( !$handler->supportsRedirects() ) {
 585                         $createRedirect = false;
 586                 } elseif ( $user->isAllowed( 'suppressredirect' ) ) {
 587                         $createRedirect = $this->leaveRedirect;
 588                 } else {
 589                         $createRedirect = true;
 590                 }
 591
 592                 # Do the actual move.
 593                 $mp = new MovePage( $ot, $nt );
 594
 595                 $userPermitted = $mp->checkPermissions( $user, $this->reason )->isOK();
 596
 597                 $status = $mp->moveIfAllowed( $user, $this->reason, $createRedirect );
 598                 if ( !$status->isOK() ) {
 599                         $this->showForm( $status->getErrorsArray(), !$userPermitted );
 600                         return;
 601                 }
 602
 603                 if ( $this->getConfig()->get( 'FixDoubleRedirects' ) && $this->fixRedirects ) {
 604                         DoubleRedirectJob::fixRedirects( 'move', $ot, $nt );
 605                 }
 606
 607                 $out = $this->getOutput();
 608                 $out->setPageTitle( $this->msg( 'pagemovedsub' ) );
 609
 610                 $linkRenderer = $this->getLinkRenderer();
 611                 $oldLink = $linkRenderer->makeLink(
 612                         $ot,
 613                         null,
 614                         [ 'id' => 'movepage-oldlink' ],
 615                         [ 'redirect' => 'no' ]
 616                 );
 617                 $newLink = $linkRenderer->makeKnownLink(
 618                         $nt,
 619                         null,
 620                         [ 'id' => 'movepage-newlink' ]
 621                 );
 622                 $oldText = $ot->getPrefixedText();
 623                 $newText = $nt->getPrefixedText();
 624
 625                 if ( $ot->exists() ) {
 626                         // NOTE: we assume that if the old title exists, it's because it was re-created as
 627                         // a redirect to the new title. This is not safe, but what we did before was
 628                         // even worse: we just determined whether a redirect should have been created,
 629                         // and reported that it was created if it should have, without any checks.
 630                         // Also note that isRedirect() is unreliable because of T39209.
 631                         $msgName = 'movepage-moved-redirect';
 632                 } else {
 633                         $msgName = 'movepage-moved-noredirect';
 634                 }
 635
 636                 $out->addHTML( $this->msg( 'movepage-moved' )->rawParams( $oldLink,
 637                         $newLink )->params( $oldText, $newText )->parseAsBlock() );
 638                 $out->addWikiMsg( $msgName );
 639
 640                 // Avoid PHP 7.1 warning from passing $this by reference
 641                 $movePage = $this;
 642                 Hooks::run( 'SpecialMovepageAfterMove', [ &$movePage, &$ot, &$nt ] );
 643
 644                 # Now we move extra pages we've been asked to move: subpages and talk
 645                 # pages.  First, if the old page or the new page is a talk page, we
 646                 # can't move any talk pages: cancel that.
 647                 if ( $ot->isTalkPage() || $nt->isTalkPage() ) {
 648                         $this->moveTalk = false;
 649                 }
 650
 651                 if ( count( $ot->getUserPermissionsErrors( 'move-subpages', $user ) ) ) {
 652                         $this->moveSubpages = false;
 653                 }
 654
 655                 /**
 656                  * Next make a list of id's.  This might be marginally less efficient
 657                  * than a more direct method, but this is not a highly performance-cri-
 658                  * tical code path and readable code is more important here.
 659                  *
 660                  * If the target namespace doesn't allow subpages, moving with subpages
 661                  * would mean that you couldn't move them back in one operation, which
 662                  * is bad.
 663                  * @todo FIXME: A specific error message should be given in this case.
 664                  */
 665
 666                 // @todo FIXME: Use Title::moveSubpages() here
 667                 $dbr = wfGetDB( DB_MASTER );
 668                 if ( $this->moveSubpages && (
 669                         MWNamespace::hasSubpages( $nt->getNamespace() ) || (
 670                                 $this->moveTalk
 671                                         && MWNamespace::hasSubpages( $nt->getTalkPage()->getNamespace() )
 672                         )
 673                 ) ) {
 674                         $conds = [
 675                                 'page_title' . $dbr->buildLike( $ot->getDBkey() . '/', $dbr->anyString() )
 676                                         . ' OR page_title = ' . $dbr->addQuotes( $ot->getDBkey() )
 677                         ];
 678                         $conds['page_namespace'] = [];
 679                         if ( MWNamespace::hasSubpages( $nt->getNamespace() ) ) {
 680                                 $conds['page_namespace'][] = $ot->getNamespace();
 681                         }
 682                         if ( $this->moveTalk &&
 683                                 MWNamespace::hasSubpages( $nt->getTalkPage()->getNamespace() )
 684                         ) {
 685                                 $conds['page_namespace'][] = $ot->getTalkPage()->getNamespace();
 686                         }
 687                 } elseif ( $this->moveTalk ) {
 688                         $conds = [
 689                                 'page_namespace' => $ot->getTalkPage()->getNamespace(),
 690                                 'page_title' => $ot->getDBkey()
 691                         ];
 692                 } else {
 693                         # Skip the query
 694                         $conds = null;
 695                 }
 696
 697                 $extraPages = [];
 698                 if ( !is_null( $conds ) ) {
 699                         $extraPages = TitleArray::newFromResult(
 700                                 $dbr->select( 'page',
 701                                         [ 'page_id', 'page_namespace', 'page_title' ],
 702                                         $conds,
 703                                         __METHOD__
 704                                 )
 705                         );
 706                 }
 707
 708                 $extraOutput = [];
 709                 $count = 1;
 710                 foreach ( $extraPages as $oldSubpage ) {
 711                         if ( $ot->equals( $oldSubpage ) || $nt->equals( $oldSubpage ) ) {
 712                                 # Already did this one.
 713                                 continue;
 714                         }
 715
 716                         $newPageName = preg_replace(
 717                                 '#^' . preg_quote( $ot->getDBkey(), '#' ) . '#',
 718                                 StringUtils::escapeRegexReplacement( $nt->getDBkey() ), # T23234
 719                                 $oldSubpage->getDBkey()
 720                         );
 721
 722                         if ( $oldSubpage->isSubpage() && ( $ot->isTalkPage() xor $nt->isTalkPage() ) ) {
 723                                 // Moving a subpage from a subject namespace to a talk namespace or vice-versa
 724                                 $newNs = $nt->getNamespace();
 725                         } elseif ( $oldSubpage->isTalkPage() ) {
 726                                 $newNs = $nt->getTalkPage()->getNamespace();
 727                         } else {
 728                                 $newNs = $nt->getSubjectPage()->getNamespace();
 729                         }
 730
 731                         # T16385: we need makeTitleSafe because the new page names may
 732                         # be longer than 255 characters.
 733                         $newSubpage = Title::makeTitleSafe( $newNs, $newPageName );
 734                         if ( !$newSubpage ) {
 735                                 $oldLink = $linkRenderer->makeKnownLink( $oldSubpage );
 736                                 $extraOutput[] = $this->msg( 'movepage-page-unmoved' )->rawParams( $oldLink )
 737                                         ->params( Title::makeName( $newNs, $newPageName ) )->escaped();
 738                                 continue;
 739                         }
 740
 741                         # This was copy-pasted from Renameuser, bleh.
 742                         if ( $newSubpage->exists() && !$oldSubpage->isValidMoveTarget( $newSubpage ) ) {
 743                                 $link = $linkRenderer->makeKnownLink( $newSubpage );
 744                                 $extraOutput[] = $this->msg( 'movepage-page-exists' )->rawParams( $link )->escaped();
 745                         } else {
 746                                 $success = $oldSubpage->moveTo( $newSubpage, true, $this->reason, $createRedirect );
 747
 748                                 if ( $success === true ) {
 749                                         if ( $this->fixRedirects ) {
 750                                                 DoubleRedirectJob::fixRedirects( 'move', $oldSubpage, $newSubpage );
 751                                         }
 752                                         $oldLink = $linkRenderer->makeLink(
 753                                                 $oldSubpage,
 754                                                 null,
 755                                                 [],
 756                                                 [ 'redirect' => 'no' ]
 757                                         );
 758
 759                                         $newLink = $linkRenderer->makeKnownLink( $newSubpage );
 760                                         $extraOutput[] = $this->msg( 'movepage-page-moved' )
 761                                                 ->rawParams( $oldLink, $newLink )->escaped();
 762                                         ++$count;
 763
 764                                         $maximumMovedPages = $this->getConfig()->get( 'MaximumMovedPages' );
 765                                         if ( $count >= $maximumMovedPages ) {
 766                                                 $extraOutput[] = $this->msg( 'movepage-max-pages' )
 767                                                         ->numParams( $maximumMovedPages )->escaped();
 768                                                 break;
 769                                         }
 770                                 } else {
 771                                         $oldLink = $linkRenderer->makeKnownLink( $oldSubpage );
 772                                         $newLink = $linkRenderer->makeLink( $newSubpage );
 773                                         $extraOutput[] = $this->msg( 'movepage-page-unmoved' )
 774                                                 ->rawParams( $oldLink, $newLink )->escaped();
 775                                 }
 776                         }
 777                 }
 778
 779                 if ( $extraOutput !== [] ) {
 780                         $out->addHTML( "<ul>\n<li>" . implode( "</li>\n<li>", $extraOutput ) . "</li>\n</ul>" );
 781                 }
 782
 783                 # Deal with watches (we don't watch subpages)
 784                 WatchAction::doWatchOrUnwatch( $this->watch, $ot, $user );
 785                 WatchAction::doWatchOrUnwatch( $this->watch, $nt, $user );
 786         }
 787
 788         function showLogFragment( $title ) {
 789                 $moveLogPage = new LogPage( 'move' );
 790                 $out = $this->getOutput();
 791                 $out->addHTML( Xml::element( 'h2', null, $moveLogPage->getName()->text() ) );
 792                 LogEventsList::showLogExtract( $out, 'move', $title );
 793         }
 794
 795         /**
 796          * Show subpages of the page being moved. Section is not shown if both current
 797          * namespace does not support subpages and no talk subpages were found.
 798          *
 799          * @param Title $title Page being moved.
 800          */
 801         function showSubpages( $title ) {
 802                 $nsHasSubpages = MWNamespace::hasSubpages( $title->getNamespace() );
 803                 $subpages = $title->getSubpages();
 804                 $count = $subpages instanceof TitleArray ? $subpages->count() : 0;
 805
 806                 $titleIsTalk = $title->isTalkPage();
 807                 $subpagesTalk = $title->getTalkPage()->getSubpages();
 808                 $countTalk = $subpagesTalk instanceof TitleArray ? $subpagesTalk->count() : 0;
 809                 $totalCount = $count + $countTalk;
 810
 811                 if ( !$nsHasSubpages && $countTalk == 0 ) {
 812                         return;
 813                 }
 814
 815                 $this->getOutput()->wrapWikiMsg(
 816                         '== $1 ==',
 817                         [ 'movesubpage', ( $titleIsTalk ? $count : $totalCount ) ]
 818                 );
 819
 820                 if ( $nsHasSubpages ) {
 821                         $this->showSubpagesList( $subpages, $count, 'movesubpagetext', true );
 822                 }
 823
 824                 if ( !$titleIsTalk && $countTalk > 0 ) {
 825                         $this->showSubpagesList( $subpagesTalk, $countTalk, 'movesubpagetalktext' );
 826                 }
 827         }
 828
 829         function showSubpagesList( $subpages, $pagecount, $wikiMsg, $noSubpageMsg = false ) {
 830                 $out = $this->getOutput();
 831
 832                 # No subpages.
 833                 if ( $pagecount == 0 && $noSubpageMsg ) {
 834                         $out->addWikiMsg( 'movenosubpage' );
 835                         return;
 836                 }
 837
 838                 $out->addWikiMsg( $wikiMsg, $this->getLanguage()->formatNum( $pagecount ) );
 839                 $out->addHTML( "<ul>\n" );
 840
 841                 $linkBatch = new LinkBatch( $subpages );
 842                 $linkBatch->setCaller( __METHOD__ );
 843                 $linkBatch->execute();
 844                 $linkRenderer = $this->getLinkRenderer();
 845
 846                 foreach ( $subpages as $subpage ) {
 847                         $link = $linkRenderer->makeLink( $subpage );
 848                         $out->addHTML( "<li>$link</li>\n" );
 849                 }
 850                 $out->addHTML( "</ul>\n" );
 851         }
 852
 853         /**
 854          * Return an array of subpages beginning with $search that this special page will accept.
 855          *
 856          * @param string $search Prefix to search for
 857          * @param int $limit Maximum number of results to return (usually 10)
 858          * @param int $offset Number of results to skip (usually 0)
 859          * @return string[] Matching subpages
 860          */
 861         public function prefixSearchSubpages( $search, $limit, $offset ) {
 862                 return $this->prefixSearchString( $search, $limit, $offset );
 863         }
 864
 865         protected function getGroupName() {
 866                 return 'pagetools';
 867         }
 868 }