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 use MediaWiki\MediaWikiServices;
  25
  26 /**
  27  * A special page that allows users to change page titles
  28  *
  29  * @ingroup SpecialPage
  30  */
  31 class MovePageForm extends UnlistedSpecialPage {
  32         /** @var Title */
  33         protected $oldTitle = null;
  34
  35         /** @var Title */
  36         protected $newTitle;
  37
  38         /** @var string Text input */
  39         protected $reason;
  40
  41         // Checks
  42
  43         /** @var bool */
  44         protected $moveTalk;
  45
  46         /** @var bool */
  47         protected $deleteAndMove;
  48
  49         /** @var bool */
  50         protected $moveSubpages;
  51
  52         /** @var bool */
  53         protected $fixRedirects;
  54
  55         /** @var bool */
  56         protected $leaveRedirect;
  57
  58         /** @var bool */
  59         protected $moveOverShared;
  60
  61         private $watch = false;
  62
  63         public function __construct() {
  64                 parent::__construct( 'Movepage' );
  65         }
  66
  67         public function doesWrites() {
  68                 return true;
  69         }
  70
  71         public function execute( $par ) {
  72                 $this->useTransactionalTimeLimit();
  73
  74                 $this->checkReadOnly();
  75
  76                 $this->setHeaders();
  77                 $this->outputHeader();
  78
  79                 $request = $this->getRequest();
  80                 $target = $par ?? $request->getVal( 'target' );
  81
  82                 // Yes, the use of getVal() and getText() is wanted, see T22365
  83
  84                 $oldTitleText = $request->getVal( 'wpOldTitle', $target );
  85                 $this->oldTitle = Title::newFromText( $oldTitleText );
  86
  87                 if ( !$this->oldTitle ) {
  88                         // Either oldTitle wasn't passed, or newFromText returned null
  89                         throw new ErrorPageError( 'notargettitle', 'notargettext' );
  90                 }
  91                 if ( !$this->oldTitle->exists() ) {
  92                         throw new ErrorPageError( 'nopagetitle', 'nopagetext' );
  93                 }
  94
  95                 $newTitleTextMain = $request->getText( 'wpNewTitleMain' );
  96                 $newTitleTextNs = $request->getInt( 'wpNewTitleNs', $this->oldTitle->getNamespace() );
  97                 // Backwards compatibility for forms submitting here from other sources
  98                 // which is more common than it should be..
  99                 $newTitleText_bc = $request->getText( 'wpNewTitle' );
 100                 $this->newTitle = strlen( $newTitleText_bc ) > 0
 101                         ? Title::newFromText( $newTitleText_bc )
 102                         : Title::makeTitleSafe( $newTitleTextNs, $newTitleTextMain );
 103
 104                 $user = $this->getUser();
 105
 106                 # Check rights
 107                 $permErrors = $this->oldTitle->getUserPermissionsErrors( 'move', $user );
 108                 if ( count( $permErrors ) ) {
 109                         // Auto-block user's IP if the account was "hard" blocked
 110                         DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 111                                 $user->spreadAnyEditBlock();
 112                         } );
 113                         throw new PermissionsError( 'move', $permErrors );
 114                 }
 115
 116                 $def = !$request->wasPosted();
 117
 118                 $this->reason = $request->getText( 'wpReason' );
 119                 $this->moveTalk = $request->getBool( 'wpMovetalk', $def );
 120                 $this->fixRedirects = $request->getBool( 'wpFixRedirects', $def );
 121                 $this->leaveRedirect = $request->getBool( 'wpLeaveRedirect', $def );
 122                 $this->moveSubpages = $request->getBool( 'wpMovesubpages' );
 123                 $this->deleteAndMove = $request->getBool( 'wpDeleteAndMove' );
 124                 $this->moveOverShared = $request->getBool( 'wpMoveOverSharedFile' );
 125                 $this->watch = $request->getCheck( 'wpWatch' ) && $user->isLoggedIn();
 126
 127                 if ( $request->getVal( 'action' ) == 'submit' && $request->wasPosted()
 128                         && $user->matchEditToken( $request->getVal( 'wpEditToken' ) )
 129                 ) {
 130                         $this->doSubmit();
 131                 } else {
 132                         $this->showForm( [] );
 133                 }
 134         }
 135
 136         /**
 137          * Show the form
 138          *
 139          * @param array $err Error messages. Each item is an error message.
 140          *    It may either be a string message name or array message name and
 141          *    parameters, like the second argument to OutputPage::wrapWikiMsg().
 142          * @param bool $isPermError Whether the error message is about user permissions.
 143          */
 144         function showForm( $err, $isPermError = false ) {
 145                 $this->getSkin()->setRelevantTitle( $this->oldTitle );
 146
 147                 $out = $this->getOutput();
 148                 $out->setPageTitle( $this->msg( 'move-page', $this->oldTitle->getPrefixedText() ) );
 149                 $out->addModuleStyles( 'mediawiki.special' );
 150                 $out->addModules( 'mediawiki.special.movePage' );
 151                 $this->addHelpLink( 'Help:Moving a page' );
 152
 153                 $out->addWikiMsg( $this->getConfig()->get( 'FixDoubleRedirects' ) ?
 154                         'movepagetext' :
 155                         'movepagetext-noredirectfixer'
 156                 );
 157
 158                 if ( $this->oldTitle->getNamespace() == NS_USER && !$this->oldTitle->isSubpage() ) {
 159                         $out->wrapWikiMsg(
 160                                 "<div class=\"warningbox mw-moveuserpage-warning\">\n$1\n</div>",
 161                                 'moveuserpage-warning'
 162                         );
 163                 } elseif ( $this->oldTitle->getNamespace() == NS_CATEGORY ) {
 164                         $out->wrapWikiMsg(
 165                                 "<div class=\"warningbox mw-movecategorypage-warning\">\n$1\n</div>",
 166                                 'movecategorypage-warning'
 167                         );
 168                 }
 169
 170                 $deleteAndMove = false;
 171                 $moveOverShared = false;
 172
 173                 $user = $this->getUser();
 174
 175                 $newTitle = $this->newTitle;
 176
 177                 if ( !$newTitle ) {
 178                         # Show the current title as a default
 179                         # when the form is first opened.
 180                         $newTitle = $this->oldTitle;
 181                 } elseif ( !count( $err ) ) {
 182                         # If a title was supplied, probably from the move log revert
 183                         # link, check for validity. We can then show some diagnostic
 184                         # information and save a click.
 185                         $mp = new MovePage( $this->oldTitle, $newTitle );
 186                         $status = $mp->isValidMove();
 187                         $status->merge( $mp->checkPermissions( $user, null ) );
 188                         if ( $status->getErrors() ) {
 189                                 $err = $status->getErrorsArray();
 190                         }
 191                 }
 192
 193                 if ( count( $err ) == 1 && isset( $err[0][0] ) && $err[0][0] == 'articleexists'
 194                         && $newTitle->quickUserCan( 'delete', $user )
 195                 ) {
 196                         $out->wrapWikiMsg(
 197                                 "<div class='warningbox'>\n$1\n</div>\n",
 198                                 [ 'delete_and_move_text', $newTitle->getPrefixedText() ]
 199                         );
 200                         $deleteAndMove = true;
 201                         $err = [];
 202                 }
 203
 204                 if ( count( $err ) == 1 && isset( $err[0][0] ) && $err[0][0] == 'file-exists-sharedrepo'
 205                         && $user->isAllowed( 'reupload-shared' )
 206                 ) {
 207                         $out->wrapWikiMsg(
 208                                 "<div class='warningbox'>\n$1\n</div>\n",
 209                                 [
 210                                         'move-over-sharedrepo',
 211                                         $newTitle->getPrefixedText()
 212                                 ]
 213                         );
 214                         $moveOverShared = true;
 215                         $err = [];
 216                 }
 217
 218                 $oldTalk = $this->oldTitle->getTalkPage();
 219                 $oldTitleSubpages = $this->oldTitle->hasSubpages();
 220                 $oldTitleTalkSubpages = $this->oldTitle->getTalkPage()->hasSubpages();
 221
 222                 $canMoveSubpage = ( $oldTitleSubpages || $oldTitleTalkSubpages ) &&
 223                         !count( $this->oldTitle->getUserPermissionsErrors( 'move-subpages', $user ) );
 224
 225                 # We also want to be able to move assoc. subpage talk-pages even if base page
 226                 # has no associated talk page, so || with $oldTitleTalkSubpages.
 227                 $considerTalk = !$this->oldTitle->isTalkPage() &&
 228                         ( $oldTalk->exists()
 229                                 || ( $oldTitleTalkSubpages && $canMoveSubpage ) );
 230
 231                 $dbr = wfGetDB( DB_REPLICA );
 232                 if ( $this->getConfig()->get( 'FixDoubleRedirects' ) ) {
 233                         $hasRedirects = $dbr->selectField( 'redirect', '1',
 234                                 [
 235                                         'rd_namespace' => $this->oldTitle->getNamespace(),
 236                                         'rd_title' => $this->oldTitle->getDBkey(),
 237                                 ], __METHOD__ );
 238                 } else {
 239                         $hasRedirects = false;
 240                 }
 241
 242                 if ( count( $err ) ) {
 243                         if ( $isPermError ) {
 244                                 $action_desc = $this->msg( 'action-move' )->plain();
 245                                 $errMsgHtml = $this->msg( 'permissionserrorstext-withaction',
 246                                         count( $err ), $action_desc )->parseAsBlock();
 247                         } else {
 248                                 $errMsgHtml = $this->msg( 'cannotmove', count( $err ) )->parseAsBlock();
 249                         }
 250
 251                         if ( count( $err ) == 1 ) {
 252                                 $errMsg = $err[0];
 253                                 $errMsgName = array_shift( $errMsg );
 254
 255                                 if ( $errMsgName == 'hookaborted' ) {
 256                                         $errMsgHtml .= "<p>{$errMsg[0]}</p>\n";
 257                                 } else {
 258                                         $errMsgHtml .= $this->msg( $errMsgName, $errMsg )->parseAsBlock();
 259                                 }
 260                         } else {
 261                                 $errStr = [];
 262
 263                                 foreach ( $err as $errMsg ) {
 264                                         if ( $errMsg[0] == 'hookaborted' ) {
 265                                                 $errStr[] = $errMsg[1];
 266                                         } else {
 267                                                 $errMsgName = array_shift( $errMsg );
 268                                                 $errStr[] = $this->msg( $errMsgName, $errMsg )->parse();
 269                                         }
 270                                 }
 271
 272                                 $errMsgHtml .= '<ul><li>' . implode( "</li>\n<li>", $errStr ) . "</li></ul>\n";
 273                         }
 274                         $out->addHTML( Html::errorBox( $errMsgHtml ) );
 275                 }
 276
 277                 if ( $this->oldTitle->isProtected( 'move' ) ) {
 278                         # Is the title semi-protected?
 279                         if ( $this->oldTitle->isSemiProtected( 'move' ) ) {
 280                                 $noticeMsg = 'semiprotectedpagemovewarning';
 281                                 $classes[] = 'mw-textarea-sprotected';
 282                         } else {
 283                                 # Then it must be protected based on static groups (regular)
 284                                 $noticeMsg = 'protectedpagemovewarning';
 285                                 $classes[] = 'mw-textarea-protected';
 286                         }
 287                         $out->addHTML( "<div class='mw-warning-with-logexcerpt'>\n" );
 288                         $out->addWikiMsg( $noticeMsg );
 289                         LogEventsList::showLogExtract(
 290                                 $out,
 291                                 'protect',
 292                                 $this->oldTitle,
 293                                 '',
 294                                 [ 'lim' => 1 ]
 295                         );
 296                         $out->addHTML( "</div>\n" );
 297                 }
 298
 299                 // Length limit for wpReason and wpNewTitleMain is enforced in the
 300                 // mediawiki.special.movePage module
 301
 302                 $immovableNamespaces = [];
 303                 foreach ( array_keys( $this->getLanguage()->getNamespaces() ) as $nsId ) {
 304                         if ( !MediaWikiServices::getInstance()->getNamespaceInfo()->isMovable( $nsId ) ) {
 305                                 $immovableNamespaces[] = $nsId;
 306                         }
 307                 }
 308
 309                 $handler = ContentHandler::getForTitle( $this->oldTitle );
 310
 311                 $out->enableOOUI();
 312                 $fields = [];
 313
 314                 $fields[] = new OOUI\FieldLayout(
 315                         new MediaWiki\Widget\ComplexTitleInputWidget( [
 316                                 'id' => 'wpNewTitle',
 317                                 'namespace' => [
 318                                         'id' => 'wpNewTitleNs',
 319                                         'name' => 'wpNewTitleNs',
 320                                         'value' => $newTitle->getNamespace(),
 321                                         'exclude' => $immovableNamespaces,
 322                                 ],
 323                                 'title' => [
 324                                         'id' => 'wpNewTitleMain',
 325                                         'name' => 'wpNewTitleMain',
 326                                         'value' => $newTitle->getText(),
 327                                         // Inappropriate, since we're expecting the user to input a non-existent page's title
 328                                         'suggestions' => false,
 329                                 ],
 330                                 'infusable' => true,
 331                         ] ),
 332                         [
 333                                 'label' => $this->msg( 'newtitle' )->text(),
 334                                 'align' => 'top',
 335                         ]
 336                 );
 337
 338                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 339                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 340                 // Unicode codepoints.
 341                 $fields[] = new OOUI\FieldLayout(
 342                         new OOUI\TextInputWidget( [
 343                                 'name' => 'wpReason',
 344                                 'id' => 'wpReason',
 345                                 'maxLength' => CommentStore::COMMENT_CHARACTER_LIMIT,
 346                                 'infusable' => true,
 347                                 'value' => $this->reason,
 348                         ] ),
 349                         [
 350                                 'label' => $this->msg( 'movereason' )->text(),
 351                                 'align' => 'top',
 352                         ]
 353                 );
 354
 355                 if ( $considerTalk ) {
 356                         $fields[] = new OOUI\FieldLayout(
 357                                 new OOUI\CheckboxInputWidget( [
 358                                         'name' => 'wpMovetalk',
 359                                         'id' => 'wpMovetalk',
 360                                         'value' => '1',
 361                                         'selected' => $this->moveTalk,
 362                                 ] ),
 363                                 [
 364                                         'label' => $this->msg( 'movetalk' )->text(),
 365                                         'help' => new OOUI\HtmlSnippet( $this->msg( 'movepagetalktext' )->parseAsBlock() ),
 366                                         'helpInline' => true,
 367                                         'align' => 'inline',
 368                                         'id' => 'wpMovetalk-field',
 369                                 ]
 370                         );
 371                 }
 372
 373                 if ( $user->isAllowed( 'suppressredirect' ) ) {
 374                         if ( $handler->supportsRedirects() ) {
 375                                 $isChecked = $this->leaveRedirect;
 376                                 $isDisabled = false;
 377                         } else {
 378                                 $isChecked = false;
 379                                 $isDisabled = true;
 380                         }
 381                         $fields[] = new OOUI\FieldLayout(
 382                                 new OOUI\CheckboxInputWidget( [
 383                                         'name' => 'wpLeaveRedirect',
 384                                         'id' => 'wpLeaveRedirect',
 385                                         'value' => '1',
 386                                         'selected' => $isChecked,
 387                                         'disabled' => $isDisabled,
 388                                 ] ),
 389                                 [
 390                                         'label' => $this->msg( 'move-leave-redirect' )->text(),
 391                                         'align' => 'inline',
 392                                 ]
 393                         );
 394                 }
 395
 396                 if ( $hasRedirects ) {
 397                         $fields[] = new OOUI\FieldLayout(
 398                                 new OOUI\CheckboxInputWidget( [
 399                                         'name' => 'wpFixRedirects',
 400                                         'id' => 'wpFixRedirects',
 401                                         'value' => '1',
 402                                         'selected' => $this->fixRedirects,
 403                                 ] ),
 404                                 [
 405                                         'label' => $this->msg( 'fix-double-redirects' )->text(),
 406                                         'align' => 'inline',
 407                                 ]
 408                         );
 409                 }
 410
 411                 if ( $canMoveSubpage ) {
 412                         $maximumMovedPages = $this->getConfig()->get( 'MaximumMovedPages' );
 413                         $fields[] = new OOUI\FieldLayout(
 414                                 new OOUI\CheckboxInputWidget( [
 415                                         'name' => 'wpMovesubpages',
 416                                         'id' => 'wpMovesubpages',
 417                                         'value' => '1',
 418                                         # Don't check the box if we only have talk subpages to
 419                                         # move and we aren't moving the talk page.
 420                                         'selected' => $this->moveSubpages && ( $this->oldTitle->hasSubpages() || $this->moveTalk ),
 421                                 ] ),
 422                                 [
 423                                         'label' => new OOUI\HtmlSnippet(
 424                                                 $this->msg(
 425                                                         ( $this->oldTitle->hasSubpages()
 426                                                                 ? 'move-subpages'
 427                                                                 : 'move-talk-subpages' )
 428                                                 )->numParams( $maximumMovedPages )->params( $maximumMovedPages )->parse()
 429                                         ),
 430                                         'align' => 'inline',
 431                                 ]
 432                         );
 433                 }
 434
 435                 # Don't allow watching if user is not logged in
 436                 if ( $user->isLoggedIn() ) {
 437                         $watchChecked = $user->isLoggedIn() && ( $this->watch || $user->getBoolOption( 'watchmoves' )
 438                                 || $user->isWatched( $this->oldTitle ) );
 439                         $fields[] = new OOUI\FieldLayout(
 440                                 new OOUI\CheckboxInputWidget( [
 441                                         'name' => 'wpWatch',
 442                                         'id' => 'watch', # ew
 443                                         'value' => '1',
 444                                         'selected' => $watchChecked,
 445                                 ] ),
 446                                 [
 447                                         'label' => $this->msg( 'move-watch' )->text(),
 448                                         'align' => 'inline',
 449                                 ]
 450                         );
 451                 }
 452
 453                 $hiddenFields = '';
 454                 if ( $moveOverShared ) {
 455                         $hiddenFields .= Html::hidden( 'wpMoveOverSharedFile', '1' );
 456                 }
 457
 458                 if ( $deleteAndMove ) {
 459                         $fields[] = new OOUI\FieldLayout(
 460                                 new OOUI\CheckboxInputWidget( [
 461                                         'name' => 'wpDeleteAndMove',
 462                                         'id' => 'wpDeleteAndMove',
 463                                         'value' => '1',
 464                                 ] ),
 465                                 [
 466                                         'label' => $this->msg( 'delete_and_move_confirm' )->text(),
 467                                         'align' => 'inline',
 468                                 ]
 469                         );
 470                 }
 471
 472                 $fields[] = new OOUI\FieldLayout(
 473                         new OOUI\ButtonInputWidget( [
 474                                 'name' => 'wpMove',
 475                                 'value' => $this->msg( 'movepagebtn' )->text(),
 476                                 'label' => $this->msg( 'movepagebtn' )->text(),
 477                                 'flags' => [ 'primary', 'progressive' ],
 478                                 'type' => 'submit',
 479                         ] ),
 480                         [
 481                                 'align' => 'top',
 482                         ]
 483                 );
 484
 485                 $fieldset = new OOUI\FieldsetLayout( [
 486                         'label' => $this->msg( 'move-page-legend' )->text(),
 487                         'id' => 'mw-movepage-table',
 488                         'items' => $fields,
 489                 ] );
 490
 491                 $form = new OOUI\FormLayout( [
 492                         'method' => 'post',
 493                         'action' => $this->getPageTitle()->getLocalURL( 'action=submit' ),
 494                         'id' => 'movepage',
 495                 ] );
 496                 $form->appendContent(
 497                         $fieldset,
 498                         new OOUI\HtmlSnippet(
 499                                 $hiddenFields .
 500                                 Html::hidden( 'wpOldTitle', $this->oldTitle->getPrefixedText() ) .
 501                                 Html::hidden( 'wpEditToken', $user->getEditToken() )
 502                         )
 503                 );
 504
 505                 $out->addHTML(
 506                         new OOUI\PanelLayout( [
 507                                 'classes' => [ 'movepage-wrapper' ],
 508                                 'expanded' => false,
 509                                 'padded' => true,
 510                                 'framed' => true,
 511                                 'content' => $form,
 512                         ] )
 513                 );
 514
 515                 $this->showLogFragment( $this->oldTitle );
 516                 $this->showSubpages( $this->oldTitle );
 517         }
 518
 519         function doSubmit() {
 520                 $user = $this->getUser();
 521
 522                 if ( $user->pingLimiter( 'move' ) ) {
 523                         throw new ThrottledError;
 524                 }
 525
 526                 $ot = $this->oldTitle;
 527                 $nt = $this->newTitle;
 528
 529                 # don't allow moving to pages with # in
 530                 if ( !$nt || $nt->hasFragment() ) {
 531                         $this->showForm( [ [ 'badtitletext' ] ] );
 532
 533                         return;
 534                 }
 535
 536                 # Show a warning if the target file exists on a shared repo
 537                 if ( $nt->getNamespace() == NS_FILE
 538                         && !( $this->moveOverShared && $user->isAllowed( 'reupload-shared' ) )
 539                         && !RepoGroup::singleton()->getLocalRepo()->findFile( $nt )
 540                         && wfFindFile( $nt )
 541                 ) {
 542                         $this->showForm( [ [ 'file-exists-sharedrepo' ] ] );
 543
 544                         return;
 545                 }
 546
 547                 # Delete to make way if requested
 548                 if ( $this->deleteAndMove ) {
 549                         $permErrors = $nt->getUserPermissionsErrors( 'delete', $user );
 550                         if ( count( $permErrors ) ) {
 551                                 # Only show the first error
 552                                 $this->showForm( $permErrors, true );
 553
 554                                 return;
 555                         }
 556
 557                         $page = WikiPage::factory( $nt );
 558
 559                         // Small safety margin to guard against concurrent edits
 560                         if ( $page->isBatchedDelete( 5 ) ) {
 561                                 $this->showForm( [ [ 'movepage-delete-first' ] ] );
 562
 563                                 return;
 564                         }
 565
 566                         $reason = $this->msg( 'delete_and_move_reason', $ot )->inContentLanguage()->text();
 567
 568                         // Delete an associated image if there is
 569                         if ( $nt->getNamespace() == NS_FILE ) {
 570                                 $file = wfLocalFile( $nt );
 571                                 $file->load( File::READ_LATEST );
 572                                 if ( $file->exists() ) {
 573                                         $file->delete( $reason, false, $user );
 574                                 }
 575                         }
 576
 577                         $error = ''; // passed by ref
 578                         $deleteStatus = $page->doDeleteArticleReal( $reason, false, 0, true, $error, $user );
 579                         if ( !$deleteStatus->isGood() ) {
 580                                 $this->showForm( $deleteStatus->getErrorsArray() );
 581
 582                                 return;
 583                         }
 584                 }
 585
 586                 $handler = ContentHandler::getForTitle( $ot );
 587
 588                 if ( !$handler->supportsRedirects() ) {
 589                         $createRedirect = false;
 590                 } elseif ( $user->isAllowed( 'suppressredirect' ) ) {
 591                         $createRedirect = $this->leaveRedirect;
 592                 } else {
 593                         $createRedirect = true;
 594                 }
 595
 596                 # Do the actual move.
 597                 $mp = new MovePage( $ot, $nt );
 598
 599                 $userPermitted = $mp->checkPermissions( $user, $this->reason )->isOK();
 600
 601                 $status = $mp->moveIfAllowed( $user, $this->reason, $createRedirect );
 602                 if ( !$status->isOK() ) {
 603                         $this->showForm( $status->getErrorsArray(), !$userPermitted );
 604                         return;
 605                 }
 606
 607                 if ( $this->getConfig()->get( 'FixDoubleRedirects' ) && $this->fixRedirects ) {
 608                         DoubleRedirectJob::fixRedirects( 'move', $ot, $nt );
 609                 }
 610
 611                 $out = $this->getOutput();
 612                 $out->setPageTitle( $this->msg( 'pagemovedsub' ) );
 613
 614                 $linkRenderer = $this->getLinkRenderer();
 615                 $oldLink = $linkRenderer->makeLink(
 616                         $ot,
 617                         null,
 618                         [ 'id' => 'movepage-oldlink' ],
 619                         [ 'redirect' => 'no' ]
 620                 );
 621                 $newLink = $linkRenderer->makeKnownLink(
 622                         $nt,
 623                         null,
 624                         [ 'id' => 'movepage-newlink' ]
 625                 );
 626                 $oldText = $ot->getPrefixedText();
 627                 $newText = $nt->getPrefixedText();
 628
 629                 if ( $ot->exists() ) {
 630                         // NOTE: we assume that if the old title exists, it's because it was re-created as
 631                         // a redirect to the new title. This is not safe, but what we did before was
 632                         // even worse: we just determined whether a redirect should have been created,
 633                         // and reported that it was created if it should have, without any checks.
 634                         // Also note that isRedirect() is unreliable because of T39209.
 635                         $msgName = 'movepage-moved-redirect';
 636                 } else {
 637                         $msgName = 'movepage-moved-noredirect';
 638                 }
 639
 640                 $out->addHTML( $this->msg( 'movepage-moved' )->rawParams( $oldLink,
 641                         $newLink )->params( $oldText, $newText )->parseAsBlock() );
 642                 $out->addWikiMsg( $msgName );
 643
 644                 // Avoid PHP 7.1 warning from passing $this by reference
 645                 $movePage = $this;
 646                 Hooks::run( 'SpecialMovepageAfterMove', [ &$movePage, &$ot, &$nt ] );
 647
 648                 # Now we move extra pages we've been asked to move: subpages and talk
 649                 # pages.  First, if the old page or the new page is a talk page, we
 650                 # can't move any talk pages: cancel that.
 651                 if ( $ot->isTalkPage() || $nt->isTalkPage() ) {
 652                         $this->moveTalk = false;
 653                 }
 654
 655                 if ( count( $ot->getUserPermissionsErrors( 'move-subpages', $user ) ) ) {
 656                         $this->moveSubpages = false;
 657                 }
 658
 659                 /**
 660                  * Next make a list of id's.  This might be marginally less efficient
 661                  * than a more direct method, but this is not a highly performance-cri-
 662                  * tical code path and readable code is more important here.
 663                  *
 664                  * If the target namespace doesn't allow subpages, moving with subpages
 665                  * would mean that you couldn't move them back in one operation, which
 666                  * is bad.
 667                  * @todo FIXME: A specific error message should be given in this case.
 668                  */
 669
 670                 // @todo FIXME: Use Title::moveSubpages() here
 671                 $nsInfo = MediaWikiServices::getInstance()->getNamespaceInfo();
 672                 $dbr = wfGetDB( DB_MASTER );
 673                 if ( $this->moveSubpages && (
 674                         $nsInfo->hasSubpages( $nt->getNamespace() ) || (
 675                                 $this->moveTalk
 676                                         && $nsInfo->hasSubpages( $nt->getTalkPage()->getNamespace() )
 677                         )
 678                 ) ) {
 679                         $conds = [
 680                                 'page_title' . $dbr->buildLike( $ot->getDBkey() . '/', $dbr->anyString() )
 681                                         . ' OR page_title = ' . $dbr->addQuotes( $ot->getDBkey() )
 682                         ];
 683                         $conds['page_namespace'] = [];
 684                         if ( $nsInfo->hasSubpages( $nt->getNamespace() ) ) {
 685                                 $conds['page_namespace'][] = $ot->getNamespace();
 686                         }
 687                         if ( $this->moveTalk &&
 688                                 $nsInfo->hasSubpages( $nt->getTalkPage()->getNamespace() )
 689                         ) {
 690                                 $conds['page_namespace'][] = $ot->getTalkPage()->getNamespace();
 691                         }
 692                 } elseif ( $this->moveTalk ) {
 693                         $conds = [
 694                                 'page_namespace' => $ot->getTalkPage()->getNamespace(),
 695                                 'page_title' => $ot->getDBkey()
 696                         ];
 697                 } else {
 698                         # Skip the query
 699                         $conds = null;
 700                 }
 701
 702                 $extraPages = [];
 703                 if ( !is_null( $conds ) ) {
 704                         $extraPages = TitleArray::newFromResult(
 705                                 $dbr->select( 'page',
 706                                         [ 'page_id', 'page_namespace', 'page_title' ],
 707                                         $conds,
 708                                         __METHOD__
 709                                 )
 710                         );
 711                 }
 712
 713                 $extraOutput = [];
 714                 $count = 1;
 715                 foreach ( $extraPages as $oldSubpage ) {
 716                         if ( $ot->equals( $oldSubpage ) || $nt->equals( $oldSubpage ) ) {
 717                                 # Already did this one.
 718                                 continue;
 719                         }
 720
 721                         $newPageName = preg_replace(
 722                                 '#^' . preg_quote( $ot->getDBkey(), '#' ) . '#',
 723                                 StringUtils::escapeRegexReplacement( $nt->getDBkey() ), # T23234
 724                                 $oldSubpage->getDBkey()
 725                         );
 726
 727                         if ( $oldSubpage->isSubpage() && ( $ot->isTalkPage() xor $nt->isTalkPage() ) ) {
 728                                 // Moving a subpage from a subject namespace to a talk namespace or vice-versa
 729                                 $newNs = $nt->getNamespace();
 730                         } elseif ( $oldSubpage->isTalkPage() ) {
 731                                 $newNs = $nt->getTalkPage()->getNamespace();
 732                         } else {
 733                                 $newNs = $nt->getSubjectPage()->getNamespace();
 734                         }
 735
 736                         # T16385: we need makeTitleSafe because the new page names may
 737                         # be longer than 255 characters.
 738                         $newSubpage = Title::makeTitleSafe( $newNs, $newPageName );
 739                         if ( !$newSubpage ) {
 740                                 $oldLink = $linkRenderer->makeKnownLink( $oldSubpage );
 741                                 $extraOutput[] = $this->msg( 'movepage-page-unmoved' )->rawParams( $oldLink )
 742                                         ->params( Title::makeName( $newNs, $newPageName ) )->escaped();
 743                                 continue;
 744                         }
 745
 746                         $mp = new MovePage( $oldSubpage, $newSubpage );
 747                         # This was copy-pasted from Renameuser, bleh.
 748                         if ( $newSubpage->exists() && !$mp->isValidMove()->isOk() ) {
 749                                 $link = $linkRenderer->makeKnownLink( $newSubpage );
 750                                 $extraOutput[] = $this->msg( 'movepage-page-exists' )->rawParams( $link )->escaped();
 751                         } else {
 752                                 $status = $mp->moveIfAllowed( $user, $this->reason, $createRedirect );
 753
 754                                 if ( $status->isOK() ) {
 755                                         if ( $this->fixRedirects ) {
 756                                                 DoubleRedirectJob::fixRedirects( 'move', $oldSubpage, $newSubpage );
 757                                         }
 758                                         $oldLink = $linkRenderer->makeLink(
 759                                                 $oldSubpage,
 760                                                 null,
 761                                                 [],
 762                                                 [ 'redirect' => 'no' ]
 763                                         );
 764
 765                                         $newLink = $linkRenderer->makeKnownLink( $newSubpage );
 766                                         $extraOutput[] = $this->msg( 'movepage-page-moved' )
 767                                                 ->rawParams( $oldLink, $newLink )->escaped();
 768                                         ++$count;
 769
 770                                         $maximumMovedPages = $this->getConfig()->get( 'MaximumMovedPages' );
 771                                         if ( $count >= $maximumMovedPages ) {
 772                                                 $extraOutput[] = $this->msg( 'movepage-max-pages' )
 773                                                         ->numParams( $maximumMovedPages )->escaped();
 774                                                 break;
 775                                         }
 776                                 } else {
 777                                         $oldLink = $linkRenderer->makeKnownLink( $oldSubpage );
 778                                         $newLink = $linkRenderer->makeLink( $newSubpage );
 779                                         $extraOutput[] = $this->msg( 'movepage-page-unmoved' )
 780                                                 ->rawParams( $oldLink, $newLink )->escaped();
 781                                 }
 782                         }
 783                 }
 784
 785                 if ( $extraOutput !== [] ) {
 786                         $out->addHTML( "<ul>\n<li>" . implode( "</li>\n<li>", $extraOutput ) . "</li>\n</ul>" );
 787                 }
 788
 789                 # Deal with watches (we don't watch subpages)
 790                 WatchAction::doWatchOrUnwatch( $this->watch, $ot, $user );
 791                 WatchAction::doWatchOrUnwatch( $this->watch, $nt, $user );
 792         }
 793
 794         function showLogFragment( $title ) {
 795                 $moveLogPage = new LogPage( 'move' );
 796                 $out = $this->getOutput();
 797                 $out->addHTML( Xml::element( 'h2', null, $moveLogPage->getName()->text() ) );
 798                 LogEventsList::showLogExtract( $out, 'move', $title );
 799         }
 800
 801         /**
 802          * Show subpages of the page being moved. Section is not shown if both current
 803          * namespace does not support subpages and no talk subpages were found.
 804          *
 805          * @param Title $title Page being moved.
 806          */
 807         function showSubpages( $title ) {
 808                 $nsHasSubpages = MediaWikiServices::getInstance()->getNamespaceInfo()->
 809                         hasSubpages( $title->getNamespace() );
 810                 $subpages = $title->getSubpages();
 811                 $count = $subpages instanceof TitleArray ? $subpages->count() : 0;
 812
 813                 $titleIsTalk = $title->isTalkPage();
 814                 $subpagesTalk = $title->getTalkPage()->getSubpages();
 815                 $countTalk = $subpagesTalk instanceof TitleArray ? $subpagesTalk->count() : 0;
 816                 $totalCount = $count + $countTalk;
 817
 818                 if ( !$nsHasSubpages && $countTalk == 0 ) {
 819                         return;
 820                 }
 821
 822                 $this->getOutput()->wrapWikiMsg(
 823                         '== $1 ==',
 824                         [ 'movesubpage', ( $titleIsTalk ? $count : $totalCount ) ]
 825                 );
 826
 827                 if ( $nsHasSubpages ) {
 828                         $this->showSubpagesList( $subpages, $count, 'movesubpagetext', true );
 829                 }
 830
 831                 if ( !$titleIsTalk && $countTalk > 0 ) {
 832                         $this->showSubpagesList( $subpagesTalk, $countTalk, 'movesubpagetalktext' );
 833                 }
 834         }
 835
 836         function showSubpagesList( $subpages, $pagecount, $wikiMsg, $noSubpageMsg = false ) {
 837                 $out = $this->getOutput();
 838
 839                 # No subpages.
 840                 if ( $pagecount == 0 && $noSubpageMsg ) {
 841                         $out->addWikiMsg( 'movenosubpage' );
 842                         return;
 843                 }
 844
 845                 $out->addWikiMsg( $wikiMsg, $this->getLanguage()->formatNum( $pagecount ) );
 846                 $out->addHTML( "<ul>\n" );
 847
 848                 $linkBatch = new LinkBatch( $subpages );
 849                 $linkBatch->setCaller( __METHOD__ );
 850                 $linkBatch->execute();
 851                 $linkRenderer = $this->getLinkRenderer();
 852
 853                 foreach ( $subpages as $subpage ) {
 854                         $link = $linkRenderer->makeLink( $subpage );
 855                         $out->addHTML( "<li>$link</li>\n" );
 856                 }
 857                 $out->addHTML( "</ul>\n" );
 858         }
 859
 860         /**
 861          * Return an array of subpages beginning with $search that this special page will accept.
 862          *
 863          * @param string $search Prefix to search for
 864          * @param int $limit Maximum number of results to return (usually 10)
 865          * @param int $offset Number of results to skip (usually 0)
 866          * @return string[] Matching subpages
 867          */
 868         public function prefixSearchSubpages( $search, $limit, $offset ) {
 869                 return $this->prefixSearchString( $search, $limit, $offset );
 870         }
 871
 872         protected function getGroupName() {
 873                 return 'pagetools';
 874         }
 875 }