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                 $newTitle = $this->newTitle;
 174
 175                 if ( !$newTitle ) {
 176                         # Show the current title as a default
 177                         # when the form is first opened.
 178                         $newTitle = $this->oldTitle;
 179                 } elseif ( !count( $err ) ) {
 180                         # If a title was supplied, probably from the move log revert
 181                         # link, check for validity. We can then show some diagnostic
 182                         # information and save a click.
 183                         $newerr = $this->oldTitle->isValidMoveOperation( $newTitle );
 184                         if ( is_array( $newerr ) ) {
 185                                 $err = $newerr;
 186                         }
 187                 }
 188
 189                 $user = $this->getUser();
 190
 191                 if ( count( $err ) == 1 && isset( $err[0][0] ) && $err[0][0] == 'articleexists'
 192                         && $newTitle->quickUserCan( 'delete', $user )
 193                 ) {
 194                         $out->wrapWikiMsg(
 195                                 "<div class='warningbox'>\n$1\n</div>\n",
 196                                 [ 'delete_and_move_text', $newTitle->getPrefixedText() ]
 197                         );
 198                         $deleteAndMove = true;
 199                         $err = [];
 200                 }
 201
 202                 if ( count( $err ) == 1 && isset( $err[0][0] ) && $err[0][0] == 'file-exists-sharedrepo'
 203                         && $user->isAllowed( 'reupload-shared' )
 204                 ) {
 205                         $out->wrapWikiMsg(
 206                                 "<div class='warningbox'>\n$1\n</div>\n",
 207                                 [
 208                                         'move-over-sharedrepo',
 209                                         $newTitle->getPrefixedText()
 210                                 ]
 211                         );
 212                         $moveOverShared = true;
 213                         $err = [];
 214                 }
 215
 216                 $oldTalk = $this->oldTitle->getTalkPage();
 217                 $oldTitleSubpages = $this->oldTitle->hasSubpages();
 218                 $oldTitleTalkSubpages = $this->oldTitle->getTalkPage()->hasSubpages();
 219
 220                 $canMoveSubpage = ( $oldTitleSubpages || $oldTitleTalkSubpages ) &&
 221                         !count( $this->oldTitle->getUserPermissionsErrors( 'move-subpages', $user ) );
 222
 223                 # We also want to be able to move assoc. subpage talk-pages even if base page
 224                 # has no associated talk page, so || with $oldTitleTalkSubpages.
 225                 $considerTalk = !$this->oldTitle->isTalkPage() &&
 226                         ( $oldTalk->exists()
 227                                 || ( $oldTitleTalkSubpages && $canMoveSubpage ) );
 228
 229                 $dbr = wfGetDB( DB_REPLICA );
 230                 if ( $this->getConfig()->get( 'FixDoubleRedirects' ) ) {
 231                         $hasRedirects = $dbr->selectField( 'redirect', '1',
 232                                 [
 233                                         'rd_namespace' => $this->oldTitle->getNamespace(),
 234                                         'rd_title' => $this->oldTitle->getDBkey(),
 235                                 ], __METHOD__ );
 236                 } else {
 237                         $hasRedirects = false;
 238                 }
 239
 240                 if ( count( $err ) ) {
 241                         if ( $isPermError ) {
 242                                 $action_desc = $this->msg( 'action-move' )->plain();
 243                                 $errMsgHtml = $this->msg( 'permissionserrorstext-withaction',
 244                                         count( $err ), $action_desc )->parseAsBlock();
 245                         } else {
 246                                 $errMsgHtml = $this->msg( 'cannotmove', count( $err ) )->parseAsBlock();
 247                         }
 248
 249                         if ( count( $err ) == 1 ) {
 250                                 $errMsg = $err[0];
 251                                 $errMsgName = array_shift( $errMsg );
 252
 253                                 if ( $errMsgName == 'hookaborted' ) {
 254                                         $errMsgHtml .= "<p>{$errMsg[0]}</p>\n";
 255                                 } else {
 256                                         $errMsgHtml .= $this->msg( $errMsgName, $errMsg )->parseAsBlock();
 257                                 }
 258                         } else {
 259                                 $errStr = [];
 260
 261                                 foreach ( $err as $errMsg ) {
 262                                         if ( $errMsg[0] == 'hookaborted' ) {
 263                                                 $errStr[] = $errMsg[1];
 264                                         } else {
 265                                                 $errMsgName = array_shift( $errMsg );
 266                                                 $errStr[] = $this->msg( $errMsgName, $errMsg )->parse();
 267                                         }
 268                                 }
 269
 270                                 $errMsgHtml .= '<ul><li>' . implode( "</li>\n<li>", $errStr ) . "</li></ul>\n";
 271                         }
 272                         $out->addHTML( Html::errorBox( $errMsgHtml ) );
 273                 }
 274
 275                 if ( $this->oldTitle->isProtected( 'move' ) ) {
 276                         # Is the title semi-protected?
 277                         if ( $this->oldTitle->isSemiProtected( 'move' ) ) {
 278                                 $noticeMsg = 'semiprotectedpagemovewarning';
 279                                 $classes[] = 'mw-textarea-sprotected';
 280                         } else {
 281                                 # Then it must be protected based on static groups (regular)
 282                                 $noticeMsg = 'protectedpagemovewarning';
 283                                 $classes[] = 'mw-textarea-protected';
 284                         }
 285                         $out->addHTML( "<div class='mw-warning-with-logexcerpt'>\n" );
 286                         $out->addWikiMsg( $noticeMsg );
 287                         LogEventsList::showLogExtract(
 288                                 $out,
 289                                 'protect',
 290                                 $this->oldTitle,
 291                                 '',
 292                                 [ 'lim' => 1 ]
 293                         );
 294                         $out->addHTML( "</div>\n" );
 295                 }
 296
 297                 // Length limit for wpReason and wpNewTitleMain is enforced in the
 298                 // mediawiki.special.movePage module
 299
 300                 $immovableNamespaces = [];
 301                 foreach ( array_keys( $this->getLanguage()->getNamespaces() ) as $nsId ) {
 302                         if ( !MediaWikiServices::getInstance()->getNamespaceInfo()->isMovable( $nsId ) ) {
 303                                 $immovableNamespaces[] = $nsId;
 304                         }
 305                 }
 306
 307                 $handler = ContentHandler::getForTitle( $this->oldTitle );
 308
 309                 $out->enableOOUI();
 310                 $fields = [];
 311
 312                 $fields[] = new OOUI\FieldLayout(
 313                         new MediaWiki\Widget\ComplexTitleInputWidget( [
 314                                 'id' => 'wpNewTitle',
 315                                 'namespace' => [
 316                                         'id' => 'wpNewTitleNs',
 317                                         'name' => 'wpNewTitleNs',
 318                                         'value' => $newTitle->getNamespace(),
 319                                         'exclude' => $immovableNamespaces,
 320                                 ],
 321                                 'title' => [
 322                                         'id' => 'wpNewTitleMain',
 323                                         'name' => 'wpNewTitleMain',
 324                                         'value' => $newTitle->getText(),
 325                                         // Inappropriate, since we're expecting the user to input a non-existent page's title
 326                                         'suggestions' => false,
 327                                 ],
 328                                 'infusable' => true,
 329                         ] ),
 330                         [
 331                                 'label' => $this->msg( 'newtitle' )->text(),
 332                                 'align' => 'top',
 333                         ]
 334                 );
 335
 336                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 337                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 338                 // Unicode codepoints.
 339                 $fields[] = new OOUI\FieldLayout(
 340                         new OOUI\TextInputWidget( [
 341                                 'name' => 'wpReason',
 342                                 'id' => 'wpReason',
 343                                 'maxLength' => CommentStore::COMMENT_CHARACTER_LIMIT,
 344                                 'infusable' => true,
 345                                 'value' => $this->reason,
 346                         ] ),
 347                         [
 348                                 'label' => $this->msg( 'movereason' )->text(),
 349                                 'align' => 'top',
 350                         ]
 351                 );
 352
 353                 if ( $considerTalk ) {
 354                         $fields[] = new OOUI\FieldLayout(
 355                                 new OOUI\CheckboxInputWidget( [
 356                                         'name' => 'wpMovetalk',
 357                                         'id' => 'wpMovetalk',
 358                                         'value' => '1',
 359                                         'selected' => $this->moveTalk,
 360                                 ] ),
 361                                 [
 362                                         'label' => $this->msg( 'movetalk' )->text(),
 363                                         'help' => new OOUI\HtmlSnippet( $this->msg( 'movepagetalktext' )->parseAsBlock() ),
 364                                         'helpInline' => true,
 365                                         'align' => 'inline',
 366                                         'id' => 'wpMovetalk-field',
 367                                 ]
 368                         );
 369                 }
 370
 371                 if ( $user->isAllowed( 'suppressredirect' ) ) {
 372                         if ( $handler->supportsRedirects() ) {
 373                                 $isChecked = $this->leaveRedirect;
 374                                 $isDisabled = false;
 375                         } else {
 376                                 $isChecked = false;
 377                                 $isDisabled = true;
 378                         }
 379                         $fields[] = new OOUI\FieldLayout(
 380                                 new OOUI\CheckboxInputWidget( [
 381                                         'name' => 'wpLeaveRedirect',
 382                                         'id' => 'wpLeaveRedirect',
 383                                         'value' => '1',
 384                                         'selected' => $isChecked,
 385                                         'disabled' => $isDisabled,
 386                                 ] ),
 387                                 [
 388                                         'label' => $this->msg( 'move-leave-redirect' )->text(),
 389                                         'align' => 'inline',
 390                                 ]
 391                         );
 392                 }
 393
 394                 if ( $hasRedirects ) {
 395                         $fields[] = new OOUI\FieldLayout(
 396                                 new OOUI\CheckboxInputWidget( [
 397                                         'name' => 'wpFixRedirects',
 398                                         'id' => 'wpFixRedirects',
 399                                         'value' => '1',
 400                                         'selected' => $this->fixRedirects,
 401                                 ] ),
 402                                 [
 403                                         'label' => $this->msg( 'fix-double-redirects' )->text(),
 404                                         'align' => 'inline',
 405                                 ]
 406                         );
 407                 }
 408
 409                 if ( $canMoveSubpage ) {
 410                         $maximumMovedPages = $this->getConfig()->get( 'MaximumMovedPages' );
 411                         $fields[] = new OOUI\FieldLayout(
 412                                 new OOUI\CheckboxInputWidget( [
 413                                         'name' => 'wpMovesubpages',
 414                                         'id' => 'wpMovesubpages',
 415                                         'value' => '1',
 416                                         'selected' => true, // T222953 Always check the box
 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                 $nsInfo = MediaWikiServices::getInstance()->getNamespaceInfo();
 668                 $dbr = wfGetDB( DB_MASTER );
 669                 if ( $this->moveSubpages && (
 670                         $nsInfo->hasSubpages( $nt->getNamespace() ) || (
 671                                 $this->moveTalk
 672                                         && $nsInfo->hasSubpages( $nt->getTalkPage()->getNamespace() )
 673                         )
 674                 ) ) {
 675                         $conds = [
 676                                 'page_title' . $dbr->buildLike( $ot->getDBkey() . '/', $dbr->anyString() )
 677                                         . ' OR page_title = ' . $dbr->addQuotes( $ot->getDBkey() )
 678                         ];
 679                         $conds['page_namespace'] = [];
 680                         if ( $nsInfo->hasSubpages( $nt->getNamespace() ) ) {
 681                                 $conds['page_namespace'][] = $ot->getNamespace();
 682                         }
 683                         if ( $this->moveTalk &&
 684                                 $nsInfo->hasSubpages( $nt->getTalkPage()->getNamespace() )
 685                         ) {
 686                                 $conds['page_namespace'][] = $ot->getTalkPage()->getNamespace();
 687                         }
 688                 } elseif ( $this->moveTalk ) {
 689                         $conds = [
 690                                 'page_namespace' => $ot->getTalkPage()->getNamespace(),
 691                                 'page_title' => $ot->getDBkey()
 692                         ];
 693                 } else {
 694                         # Skip the query
 695                         $conds = null;
 696                 }
 697
 698                 $extraPages = [];
 699                 if ( !is_null( $conds ) ) {
 700                         $extraPages = TitleArray::newFromResult(
 701                                 $dbr->select( 'page',
 702                                         [ 'page_id', 'page_namespace', 'page_title' ],
 703                                         $conds,
 704                                         __METHOD__
 705                                 )
 706                         );
 707                 }
 708
 709                 $extraOutput = [];
 710                 $count = 1;
 711                 foreach ( $extraPages as $oldSubpage ) {
 712                         if ( $ot->equals( $oldSubpage ) || $nt->equals( $oldSubpage ) ) {
 713                                 # Already did this one.
 714                                 continue;
 715                         }
 716
 717                         $newPageName = preg_replace(
 718                                 '#^' . preg_quote( $ot->getDBkey(), '#' ) . '#',
 719                                 StringUtils::escapeRegexReplacement( $nt->getDBkey() ), # T23234
 720                                 $oldSubpage->getDBkey()
 721                         );
 722
 723                         if ( $oldSubpage->isSubpage() && ( $ot->isTalkPage() xor $nt->isTalkPage() ) ) {
 724                                 // Moving a subpage from a subject namespace to a talk namespace or vice-versa
 725                                 $newNs = $nt->getNamespace();
 726                         } elseif ( $oldSubpage->isTalkPage() ) {
 727                                 $newNs = $nt->getTalkPage()->getNamespace();
 728                         } else {
 729                                 $newNs = $nt->getSubjectPage()->getNamespace();
 730                         }
 731
 732                         # T16385: we need makeTitleSafe because the new page names may
 733                         # be longer than 255 characters.
 734                         $newSubpage = Title::makeTitleSafe( $newNs, $newPageName );
 735                         if ( !$newSubpage ) {
 736                                 $oldLink = $linkRenderer->makeKnownLink( $oldSubpage );
 737                                 $extraOutput[] = $this->msg( 'movepage-page-unmoved' )->rawParams( $oldLink )
 738                                         ->params( Title::makeName( $newNs, $newPageName ) )->escaped();
 739                                 continue;
 740                         }
 741
 742                         # This was copy-pasted from Renameuser, bleh.
 743                         if ( $newSubpage->exists() && !$oldSubpage->isValidMoveTarget( $newSubpage ) ) {
 744                                 $link = $linkRenderer->makeKnownLink( $newSubpage );
 745                                 $extraOutput[] = $this->msg( 'movepage-page-exists' )->rawParams( $link )->escaped();
 746                         } else {
 747                                 $success = $oldSubpage->moveTo( $newSubpage, true, $this->reason, $createRedirect );
 748
 749                                 if ( $success === true ) {
 750                                         if ( $this->fixRedirects ) {
 751                                                 DoubleRedirectJob::fixRedirects( 'move', $oldSubpage, $newSubpage );
 752                                         }
 753                                         $oldLink = $linkRenderer->makeLink(
 754                                                 $oldSubpage,
 755                                                 null,
 756                                                 [],
 757                                                 [ 'redirect' => 'no' ]
 758                                         );
 759
 760                                         $newLink = $linkRenderer->makeKnownLink( $newSubpage );
 761                                         $extraOutput[] = $this->msg( 'movepage-page-moved' )
 762                                                 ->rawParams( $oldLink, $newLink )->escaped();
 763                                         ++$count;
 764
 765                                         $maximumMovedPages = $this->getConfig()->get( 'MaximumMovedPages' );
 766                                         if ( $count >= $maximumMovedPages ) {
 767                                                 $extraOutput[] = $this->msg( 'movepage-max-pages' )
 768                                                         ->numParams( $maximumMovedPages )->escaped();
 769                                                 break;
 770                                         }
 771                                 } else {
 772                                         $oldLink = $linkRenderer->makeKnownLink( $oldSubpage );
 773                                         $newLink = $linkRenderer->makeLink( $newSubpage );
 774                                         $extraOutput[] = $this->msg( 'movepage-page-unmoved' )
 775                                                 ->rawParams( $oldLink, $newLink )->escaped();
 776                                 }
 777                         }
 778                 }
 779
 780                 if ( $extraOutput !== [] ) {
 781                         $out->addHTML( "<ul>\n<li>" . implode( "</li>\n<li>", $extraOutput ) . "</li>\n</ul>" );
 782                 }
 783
 784                 # Deal with watches (we don't watch subpages)
 785                 WatchAction::doWatchOrUnwatch( $this->watch, $ot, $user );
 786                 WatchAction::doWatchOrUnwatch( $this->watch, $nt, $user );
 787         }
 788
 789         function showLogFragment( $title ) {
 790                 $moveLogPage = new LogPage( 'move' );
 791                 $out = $this->getOutput();
 792                 $out->addHTML( Xml::element( 'h2', null, $moveLogPage->getName()->text() ) );
 793                 LogEventsList::showLogExtract( $out, 'move', $title );
 794         }
 795
 796         /**
 797          * Show subpages of the page being moved. Section is not shown if both current
 798          * namespace does not support subpages and no talk subpages were found.
 799          *
 800          * @param Title $title Page being moved.
 801          */
 802         function showSubpages( $title ) {
 803                 $nsHasSubpages = MediaWikiServices::getInstance()->getNamespaceInfo()->
 804                         hasSubpages( $title->getNamespace() );
 805                 $subpages = $title->getSubpages();
 806                 $count = $subpages instanceof TitleArray ? $subpages->count() : 0;
 807
 808                 $titleIsTalk = $title->isTalkPage();
 809                 $subpagesTalk = $title->getTalkPage()->getSubpages();
 810                 $countTalk = $subpagesTalk instanceof TitleArray ? $subpagesTalk->count() : 0;
 811                 $totalCount = $count + $countTalk;
 812
 813                 if ( !$nsHasSubpages && $countTalk == 0 ) {
 814                         return;
 815                 }
 816
 817                 $this->getOutput()->wrapWikiMsg(
 818                         '== $1 ==',
 819                         [ 'movesubpage', ( $titleIsTalk ? $count : $totalCount ) ]
 820                 );
 821
 822                 if ( $nsHasSubpages ) {
 823                         $this->showSubpagesList( $subpages, $count, 'movesubpagetext', true );
 824                 }
 825
 826                 if ( !$titleIsTalk && $countTalk > 0 ) {
 827                         $this->showSubpagesList( $subpagesTalk, $countTalk, 'movesubpagetalktext' );
 828                 }
 829         }
 830
 831         function showSubpagesList( $subpages, $pagecount, $wikiMsg, $noSubpageMsg = false ) {
 832                 $out = $this->getOutput();
 833
 834                 # No subpages.
 835                 if ( $pagecount == 0 && $noSubpageMsg ) {
 836                         $out->addWikiMsg( 'movenosubpage' );
 837                         return;
 838                 }
 839
 840                 $out->addWikiMsg( $wikiMsg, $this->getLanguage()->formatNum( $pagecount ) );
 841                 $out->addHTML( "<ul>\n" );
 842
 843                 $linkBatch = new LinkBatch( $subpages );
 844                 $linkBatch->setCaller( __METHOD__ );
 845                 $linkBatch->execute();
 846                 $linkRenderer = $this->getLinkRenderer();
 847
 848                 foreach ( $subpages as $subpage ) {
 849                         $link = $linkRenderer->makeLink( $subpage );
 850                         $out->addHTML( "<li>$link</li>\n" );
 851                 }
 852                 $out->addHTML( "</ul>\n" );
 853         }
 854
 855         /**
 856          * Return an array of subpages beginning with $search that this special page will accept.
 857          *
 858          * @param string $search Prefix to search for
 859          * @param int $limit Maximum number of results to return (usually 10)
 860          * @param int $offset Number of results to skip (usually 0)
 861          * @return string[] Matching subpages
 862          */
 863         public function prefixSearchSubpages( $search, $limit, $offset ) {
 864                 return $this->prefixSearchString( $search, $limit, $offset );
 865         }
 866
 867         protected function getGroupName() {
 868                 return 'pagetools';
 869         }
 870 }