includes/specials/SpecialEditWatchlist.php

   1 <?php
   2 /**
   3  * @defgroup Watchlist Users watchlist handling
   4  */
   5
   6 /**
   7  * Implements Special:EditWatchlist
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  * @ingroup SpecialPage
  26  * @ingroup Watchlist
  27  */
  28
  29 use MediaWiki\Linker\LinkRenderer;
  30 use MediaWiki\Linker\LinkTarget;
  31 use MediaWiki\MediaWikiServices;
  32
  33 /**
  34  * Provides the UI through which users can perform editing
  35  * operations on their watchlist
  36  *
  37  * @ingroup SpecialPage
  38  * @ingroup Watchlist
  39  * @author Rob Church <robchur@gmail.com>
  40  */
  41 class SpecialEditWatchlist extends UnlistedSpecialPage {
  42         /**
  43          * Editing modes. EDIT_CLEAR is no longer used; the "Clear" link scared people
  44          * too much. Now it's passed on to the raw editor, from which it's very easy to clear.
  45          */
  46         const EDIT_CLEAR = 1;
  47         const EDIT_RAW = 2;
  48         const EDIT_NORMAL = 3;
  49
  50         protected $successMessage;
  51
  52         protected $toc;
  53
  54         private $badItems = [];
  55
  56         /**
  57          * @var TitleParser
  58          */
  59         private $titleParser;
  60
  61         public function __construct() {
  62                 parent::__construct( 'EditWatchlist', 'editmywatchlist' );
  63         }
  64
  65         /**
  66          * Initialize any services we'll need (unless it has already been provided via a setter).
  67          * This allows for dependency injection even though we don't control object creation.
  68          */
  69         private function initServices() {
  70                 if ( !$this->titleParser ) {
  71                         $this->titleParser = MediaWikiServices::getInstance()->getTitleParser();
  72                 }
  73         }
  74
  75         public function doesWrites() {
  76                 return true;
  77         }
  78
  79         /**
  80          * Main execution point
  81          *
  82          * @param int $mode
  83          */
  84         public function execute( $mode ) {
  85                 $this->initServices();
  86                 $this->setHeaders();
  87
  88                 # Anons don't get a watchlist
  89                 $this->requireLogin( 'watchlistanontext' );
  90
  91                 $out = $this->getOutput();
  92
  93                 $this->checkPermissions();
  94                 $this->checkReadOnly();
  95
  96                 $this->outputHeader();
  97                 $this->outputSubtitle();
  98                 $out->addModuleStyles( 'mediawiki.special' );
  99
 100                 # B/C: $mode used to be waaay down the parameter list, and the first parameter
 101                 # was $wgUser
 102                 if ( $mode instanceof User ) {
 103                         $args = func_get_args();
 104                         if ( count( $args ) >= 4 ) {
 105                                 $mode = $args[3];
 106                         }
 107                 }
 108                 $mode = self::getMode( $this->getRequest(), $mode );
 109
 110                 switch ( $mode ) {
 111                         case self::EDIT_RAW:
 112                                 $out->setPageTitle( $this->msg( 'watchlistedit-raw-title' ) );
 113                                 $form = $this->getRawForm();
 114                                 if ( $form->show() ) {
 115                                         $out->addHTML( $this->successMessage );
 116                                         $out->addReturnTo( SpecialPage::getTitleFor( 'Watchlist' ) );
 117                                 }
 118                                 break;
 119                         case self::EDIT_CLEAR:
 120                                 $out->setPageTitle( $this->msg( 'watchlistedit-clear-title' ) );
 121                                 $form = $this->getClearForm();
 122                                 if ( $form->show() ) {
 123                                         $out->addHTML( $this->successMessage );
 124                                         $out->addReturnTo( SpecialPage::getTitleFor( 'Watchlist' ) );
 125                                 }
 126                                 break;
 127
 128                         case self::EDIT_NORMAL:
 129                         default:
 130                                 $this->executeViewEditWatchlist();
 131                                 break;
 132                 }
 133         }
 134
 135         /**
 136          * Renders a subheader on the watchlist page.
 137          */
 138         protected function outputSubtitle() {
 139                 $out = $this->getOutput();
 140                 $out->addSubtitle( $this->msg( 'watchlistfor2', $this->getUser()->getName() )
 141                         ->rawParams(
 142                                 self::buildTools(
 143                                         $this->getLanguage(),
 144                                         $this->getLinkRenderer()
 145                                 )
 146                         )
 147                 );
 148         }
 149
 150         /**
 151          * Executes an edit mode for the watchlist view, from which you can manage your watchlist
 152          */
 153         protected function executeViewEditWatchlist() {
 154                 $out = $this->getOutput();
 155                 $out->setPageTitle( $this->msg( 'watchlistedit-normal-title' ) );
 156                 $form = $this->getNormalForm();
 157                 if ( $form->show() ) {
 158                         $out->addHTML( $this->successMessage );
 159                         $out->addReturnTo( SpecialPage::getTitleFor( 'Watchlist' ) );
 160                 } elseif ( $this->toc !== false ) {
 161                         $out->prependHTML( $this->toc );
 162                         $out->addModules( 'mediawiki.toc' );
 163                 }
 164         }
 165
 166         /**
 167          * Return an array of subpages that this special page will accept.
 168          *
 169          * @see also SpecialWatchlist::getSubpagesForPrefixSearch
 170          * @return string[] subpages
 171          */
 172         public function getSubpagesForPrefixSearch() {
 173                 // SpecialWatchlist uses SpecialEditWatchlist::getMode, so new types should be added
 174                 // here and there - no 'edit' here, because that the default for this page
 175                 return [
 176                         'clear',
 177                         'raw',
 178                 ];
 179         }
 180
 181         /**
 182          * Extract a list of titles from a blob of text, returning
 183          * (prefixed) strings; unwatchable titles are ignored
 184          *
 185          * @param string $list
 186          * @return array
 187          */
 188         private function extractTitles( $list ) {
 189                 $list = explode( "\n", trim( $list ) );
 190                 if ( !is_array( $list ) ) {
 191                         return [];
 192                 }
 193
 194                 $titles = [];
 195
 196                 foreach ( $list as $text ) {
 197                         $text = trim( $text );
 198                         if ( strlen( $text ) > 0 ) {
 199                                 $title = Title::newFromText( $text );
 200                                 if ( $title instanceof Title && $title->isWatchable() ) {
 201                                         $titles[] = $title;
 202                                 }
 203                         }
 204                 }
 205
 206                 MediaWikiServices::getInstance()->getGenderCache()->doTitlesArray( $titles );
 207
 208                 $list = [];
 209                 /** @var Title $title */
 210                 foreach ( $titles as $title ) {
 211                         $list[] = $title->getPrefixedText();
 212                 }
 213
 214                 return array_unique( $list );
 215         }
 216
 217         public function submitRaw( $data ) {
 218                 $wanted = $this->extractTitles( $data['Titles'] );
 219                 $current = $this->getWatchlist();
 220
 221                 if ( count( $wanted ) > 0 ) {
 222                         $toWatch = array_diff( $wanted, $current );
 223                         $toUnwatch = array_diff( $current, $wanted );
 224                         $this->watchTitles( $toWatch );
 225                         $this->unwatchTitles( $toUnwatch );
 226                         $this->getUser()->invalidateCache();
 227
 228                         if ( count( $toWatch ) > 0 || count( $toUnwatch ) > 0 ) {
 229                                 $this->successMessage = $this->msg( 'watchlistedit-raw-done' )->parse();
 230                         } else {
 231                                 return false;
 232                         }
 233
 234                         if ( count( $toWatch ) > 0 ) {
 235                                 $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-added' )
 236                                         ->numParams( count( $toWatch ) )->parse();
 237                                 $this->showTitles( $toWatch, $this->successMessage );
 238                         }
 239
 240                         if ( count( $toUnwatch ) > 0 ) {
 241                                 $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-removed' )
 242                                         ->numParams( count( $toUnwatch ) )->parse();
 243                                 $this->showTitles( $toUnwatch, $this->successMessage );
 244                         }
 245                 } else {
 246                         $this->clearWatchlist();
 247                         $this->getUser()->invalidateCache();
 248
 249                         if ( count( $current ) > 0 ) {
 250                                 $this->successMessage = $this->msg( 'watchlistedit-raw-done' )->parse();
 251                         } else {
 252                                 return false;
 253                         }
 254
 255                         $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-removed' )
 256                                 ->numParams( count( $current ) )->parse();
 257                         $this->showTitles( $current, $this->successMessage );
 258                 }
 259
 260                 return true;
 261         }
 262
 263         public function submitClear( $data ) {
 264                 $current = $this->getWatchlist();
 265                 $this->clearWatchlist();
 266                 $this->getUser()->invalidateCache();
 267                 $this->successMessage = $this->msg( 'watchlistedit-clear-done' )->parse();
 268                 $this->successMessage .= ' ' . $this->msg( 'watchlistedit-clear-removed' )
 269                         ->numParams( count( $current ) )->parse();
 270                 $this->showTitles( $current, $this->successMessage );
 271
 272                 return true;
 273         }
 274
 275         /**
 276          * Print out a list of linked titles
 277          *
 278          * $titles can be an array of strings or Title objects; the former
 279          * is preferred, since Titles are very memory-heavy
 280          *
 281          * @param array $titles Array of strings, or Title objects
 282          * @param string $output
 283          */
 284         private function showTitles( $titles, &$output ) {
 285                 $talk = $this->msg( 'talkpagelinktext' )->text();
 286                 // Do a batch existence check
 287                 $batch = new LinkBatch();
 288                 if ( count( $titles ) >= 100 ) {
 289                         $output = $this->msg( 'watchlistedit-too-many' )->parse();
 290                         return;
 291                 }
 292                 foreach ( $titles as $title ) {
 293                         if ( !$title instanceof Title ) {
 294                                 $title = Title::newFromText( $title );
 295                         }
 296
 297                         if ( $title instanceof Title ) {
 298                                 $batch->addObj( $title );
 299                                 $batch->addObj( $title->getTalkPage() );
 300                         }
 301                 }
 302
 303                 $batch->execute();
 304
 305                 // Print out the list
 306                 $output .= "<ul>\n";
 307
 308                 $linkRenderer = $this->getLinkRenderer();
 309                 foreach ( $titles as $title ) {
 310                         if ( !$title instanceof Title ) {
 311                                 $title = Title::newFromText( $title );
 312                         }
 313
 314                         if ( $title instanceof Title ) {
 315                                 $output .= '<li>' .
 316                                         $linkRenderer->makeLink( $title ) . ' ' .
 317                                         $this->msg( 'parentheses' )->rawParams(
 318                                                 $linkRenderer->makeLink( $title->getTalkPage(), $talk )
 319                                         )->escaped() .
 320                                         "</li>\n";
 321                         }
 322                 }
 323
 324                 $output .= "</ul>\n";
 325         }
 326
 327         /**
 328          * Prepare a list of titles on a user's watchlist (excluding talk pages)
 329          * and return an array of (prefixed) strings
 330          *
 331          * @return array
 332          */
 333         private function getWatchlist() {
 334                 $list = [];
 335
 336                 $watchedItems = MediaWikiServices::getInstance()->getWatchedItemStore()->getWatchedItemsForUser(
 337                         $this->getUser(),
 338                         [ 'forWrite' => $this->getRequest()->wasPosted() ]
 339                 );
 340
 341                 if ( $watchedItems ) {
 342                         /** @var Title[] $titles */
 343                         $titles = [];
 344                         foreach ( $watchedItems as $watchedItem ) {
 345                                 $namespace = $watchedItem->getLinkTarget()->getNamespace();
 346                                 $dbKey = $watchedItem->getLinkTarget()->getDBkey();
 347                                 $title = Title::makeTitleSafe( $namespace, $dbKey );
 348
 349                                 if ( $this->checkTitle( $title, $namespace, $dbKey )
 350                                         && !$title->isTalkPage()
 351                                 ) {
 352                                         $titles[] = $title;
 353                                 }
 354                         }
 355
 356                         MediaWikiServices::getInstance()->getGenderCache()->doTitlesArray( $titles );
 357
 358                         foreach ( $titles as $title ) {
 359                                 $list[] = $title->getPrefixedText();
 360                         }
 361                 }
 362
 363                 $this->cleanupWatchlist();
 364
 365                 return $list;
 366         }
 367
 368         /**
 369          * Get a list of titles on a user's watchlist, excluding talk pages,
 370          * and return as a two-dimensional array with namespace and title.
 371          *
 372          * @return array
 373          */
 374         protected function getWatchlistInfo() {
 375                 $titles = [];
 376
 377                 $watchedItems = MediaWikiServices::getInstance()->getWatchedItemStore()
 378                         ->getWatchedItemsForUser( $this->getUser(), [ 'sort' => WatchedItemStore::SORT_ASC ] );
 379
 380                 $lb = new LinkBatch();
 381
 382                 foreach ( $watchedItems as $watchedItem ) {
 383                         $namespace = $watchedItem->getLinkTarget()->getNamespace();
 384                         $dbKey = $watchedItem->getLinkTarget()->getDBkey();
 385                         $lb->add( $namespace, $dbKey );
 386                         if ( !MWNamespace::isTalk( $namespace ) ) {
 387                                 $titles[$namespace][$dbKey] = 1;
 388                         }
 389                 }
 390
 391                 $lb->execute();
 392
 393                 return $titles;
 394         }
 395
 396         /**
 397          * Validates watchlist entry
 398          *
 399          * @param Title $title
 400          * @param int $namespace
 401          * @param string $dbKey
 402          * @return bool Whether this item is valid
 403          */
 404         private function checkTitle( $title, $namespace, $dbKey ) {
 405                 if ( $title
 406                         && ( $title->isExternal()
 407                                 || $title->getNamespace() < 0
 408                         )
 409                 ) {
 410                         $title = false; // unrecoverable
 411                 }
 412
 413                 if ( !$title
 414                         || $title->getNamespace() != $namespace
 415                         || $title->getDBkey() != $dbKey
 416                 ) {
 417                         $this->badItems[] = [ $title, $namespace, $dbKey ];
 418                 }
 419
 420                 return (bool)$title;
 421         }
 422
 423         /**
 424          * Attempts to clean up broken items
 425          */
 426         private function cleanupWatchlist() {
 427                 if ( !count( $this->badItems ) ) {
 428                         return; // nothing to do
 429                 }
 430
 431                 $user = $this->getUser();
 432                 $badItems = $this->badItems;
 433                 DeferredUpdates::addCallableUpdate( function () use ( $user, $badItems ) {
 434                         $store = MediaWikiServices::getInstance()->getWatchedItemStore();
 435                         foreach ( $badItems as $row ) {
 436                                 list( $title, $namespace, $dbKey ) = $row;
 437                                 $action = $title ? 'cleaning up' : 'deleting';
 438                                 wfDebug( "User {$user->getName()} has broken watchlist item " .
 439                                         "ns($namespace):$dbKey, $action.\n" );
 440
 441                                 $store->removeWatch( $user, new TitleValue( (int)$namespace, $dbKey ) );
 442                                 // Can't just do an UPDATE instead of DELETE/INSERT due to unique index
 443                                 if ( $title ) {
 444                                         $user->addWatch( $title );
 445                                 }
 446                         }
 447                 } );
 448         }
 449
 450         /**
 451          * Remove all titles from a user's watchlist
 452          */
 453         private function clearWatchlist() {
 454                 $dbw = wfGetDB( DB_MASTER );
 455                 $dbw->delete(
 456                         'watchlist',
 457                         [ 'wl_user' => $this->getUser()->getId() ],
 458                         __METHOD__
 459                 );
 460         }
 461
 462         /**
 463          * Add a list of targets to a user's watchlist
 464          *
 465          * @param string[]|LinkTarget[] $targets
 466          */
 467         private function watchTitles( $targets ) {
 468                 $expandedTargets = [];
 469                 foreach ( $targets as $target ) {
 470                         if ( !$target instanceof LinkTarget ) {
 471                                 try {
 472                                         $target = $this->titleParser->parseTitle( $target, NS_MAIN );
 473                                 }
 474                                 catch ( MalformedTitleException $e ) {
 475                                         continue;
 476                                 }
 477                         }
 478
 479                         $ns = $target->getNamespace();
 480                         $dbKey = $target->getDBkey();
 481                         $expandedTargets[] = new TitleValue( MWNamespace::getSubject( $ns ), $dbKey );
 482                         $expandedTargets[] = new TitleValue( MWNamespace::getTalk( $ns ), $dbKey );
 483                 }
 484
 485                 MediaWikiServices::getInstance()->getWatchedItemStore()->addWatchBatchForUser(
 486                         $this->getUser(),
 487                         $expandedTargets
 488                 );
 489         }
 490
 491         /**
 492          * Remove a list of titles from a user's watchlist
 493          *
 494          * $titles can be an array of strings or Title objects; the former
 495          * is preferred, since Titles are very memory-heavy
 496          *
 497          * @param array $titles Array of strings, or Title objects
 498          */
 499         private function unwatchTitles( $titles ) {
 500                 $store = MediaWikiServices::getInstance()->getWatchedItemStore();
 501
 502                 foreach ( $titles as $title ) {
 503                         if ( !$title instanceof Title ) {
 504                                 $title = Title::newFromText( $title );
 505                         }
 506
 507                         if ( $title instanceof Title ) {
 508                                 $store->removeWatch( $this->getUser(), $title->getSubjectPage() );
 509                                 $store->removeWatch( $this->getUser(), $title->getTalkPage() );
 510
 511                                 $page = WikiPage::factory( $title );
 512                                 Hooks::run( 'UnwatchArticleComplete', [ $this->getUser(), &$page ] );
 513                         }
 514                 }
 515         }
 516
 517         public function submitNormal( $data ) {
 518                 $removed = [];
 519
 520                 foreach ( $data as $titles ) {
 521                         $this->unwatchTitles( $titles );
 522                         $removed = array_merge( $removed, $titles );
 523                 }
 524
 525                 if ( count( $removed ) > 0 ) {
 526                         $this->successMessage = $this->msg( 'watchlistedit-normal-done'
 527                         )->numParams( count( $removed ) )->parse();
 528                         $this->showTitles( $removed, $this->successMessage );
 529
 530                         return true;
 531                 } else {
 532                         return false;
 533                 }
 534         }
 535
 536         /**
 537          * Get the standard watchlist editing form
 538          *
 539          * @return HTMLForm
 540          */
 541         protected function getNormalForm() {
 542                 global $wgContLang;
 543
 544                 $fields = [];
 545                 $count = 0;
 546
 547                 // Allow subscribers to manipulate the list of watched pages (or use it
 548                 // to preload lots of details at once)
 549                 $watchlistInfo = $this->getWatchlistInfo();
 550                 Hooks::run(
 551                         'WatchlistEditorBeforeFormRender',
 552                         [ &$watchlistInfo ]
 553                 );
 554
 555                 foreach ( $watchlistInfo as $namespace => $pages ) {
 556                         $options = [];
 557
 558                         foreach ( array_keys( $pages ) as $dbkey ) {
 559                                 $title = Title::makeTitleSafe( $namespace, $dbkey );
 560
 561                                 if ( $this->checkTitle( $title, $namespace, $dbkey ) ) {
 562                                         $text = $this->buildRemoveLine( $title );
 563                                         $options[$text] = $title->getPrefixedText();
 564                                         $count++;
 565                                 }
 566                         }
 567
 568                         // checkTitle can filter some options out, avoid empty sections
 569                         if ( count( $options ) > 0 ) {
 570                                 $fields['TitlesNs' . $namespace] = [
 571                                         'class' => 'EditWatchlistCheckboxSeriesField',
 572                                         'options' => $options,
 573                                         'section' => "ns$namespace",
 574                                 ];
 575                         }
 576                 }
 577                 $this->cleanupWatchlist();
 578
 579                 if ( count( $fields ) > 1 && $count > 30 ) {
 580                         $this->toc = Linker::tocIndent();
 581                         $tocLength = 0;
 582
 583                         foreach ( $fields as $data ) {
 584                                 # strip out the 'ns' prefix from the section name:
 585                                 $ns = substr( $data['section'], 2 );
 586
 587                                 $nsText = ( $ns == NS_MAIN )
 588                                         ? $this->msg( 'blanknamespace' )->escaped()
 589                                         : htmlspecialchars( $wgContLang->getFormattedNsText( $ns ) );
 590                                 $this->toc .= Linker::tocLine( "editwatchlist-{$data['section']}", $nsText,
 591                                         $this->getLanguage()->formatNum( ++$tocLength ), 1 ) . Linker::tocLineEnd();
 592                         }
 593
 594                         $this->toc = Linker::tocList( $this->toc );
 595                 } else {
 596                         $this->toc = false;
 597                 }
 598
 599                 $context = new DerivativeContext( $this->getContext() );
 600                 $context->setTitle( $this->getPageTitle() ); // Remove subpage
 601                 $form = new EditWatchlistNormalHTMLForm( $fields, $context );
 602                 $form->setSubmitTextMsg( 'watchlistedit-normal-submit' );
 603                 $form->setSubmitDestructive();
 604                 # Used message keys:
 605                 # 'accesskey-watchlistedit-normal-submit', 'tooltip-watchlistedit-normal-submit'
 606                 $form->setSubmitTooltip( 'watchlistedit-normal-submit' );
 607                 $form->setWrapperLegendMsg( 'watchlistedit-normal-legend' );
 608                 $form->addHeaderText( $this->msg( 'watchlistedit-normal-explain' )->parse() );
 609                 $form->setSubmitCallback( [ $this, 'submitNormal' ] );
 610
 611                 return $form;
 612         }
 613
 614         /**
 615          * Build the label for a checkbox, with a link to the title, and various additional bits
 616          *
 617          * @param Title $title
 618          * @return string
 619          */
 620         private function buildRemoveLine( $title ) {
 621                 $linkRenderer = $this->getLinkRenderer();
 622                 $link = $linkRenderer->makeLink( $title );
 623
 624                 $tools['talk'] = $linkRenderer->makeLink(
 625                         $title->getTalkPage(),
 626                         $this->msg( 'talkpagelinktext' )->text()
 627                 );
 628
 629                 if ( $title->exists() ) {
 630                         $tools['history'] = $linkRenderer->makeKnownLink(
 631                                 $title,
 632                                 $this->msg( 'history_small' )->text(),
 633                                 [],
 634                                 [ 'action' => 'history' ]
 635                         );
 636                 }
 637
 638                 if ( $title->getNamespace() == NS_USER && !$title->isSubpage() ) {
 639                         $tools['contributions'] = $linkRenderer->makeKnownLink(
 640                                 SpecialPage::getTitleFor( 'Contributions', $title->getText() ),
 641                                 $this->msg( 'contributions' )->text()
 642                         );
 643                 }
 644
 645                 Hooks::run(
 646                         'WatchlistEditorBuildRemoveLine',
 647                         [ &$tools, $title, $title->isRedirect(), $this->getSkin(), &$link ]
 648                 );
 649
 650                 if ( $title->isRedirect() ) {
 651                         // Linker already makes class mw-redirect, so this is redundant
 652                         $link = '<span class="watchlistredir">' . $link . '</span>';
 653                 }
 654
 655                 return $link . ' ' .
 656                         $this->msg( 'parentheses' )->rawParams( $this->getLanguage()->pipeList( $tools ) )->escaped();
 657         }
 658
 659         /**
 660          * Get a form for editing the watchlist in "raw" mode
 661          *
 662          * @return HTMLForm
 663          */
 664         protected function getRawForm() {
 665                 $titles = implode( $this->getWatchlist(), "\n" );
 666                 $fields = [
 667                         'Titles' => [
 668                                 'type' => 'textarea',
 669                                 'label-message' => 'watchlistedit-raw-titles',
 670                                 'default' => $titles,
 671                         ],
 672                 ];
 673                 $context = new DerivativeContext( $this->getContext() );
 674                 $context->setTitle( $this->getPageTitle( 'raw' ) ); // Reset subpage
 675                 $form = new HTMLForm( $fields, $context );
 676                 $form->setSubmitTextMsg( 'watchlistedit-raw-submit' );
 677                 # Used message keys: 'accesskey-watchlistedit-raw-submit', 'tooltip-watchlistedit-raw-submit'
 678                 $form->setSubmitTooltip( 'watchlistedit-raw-submit' );
 679                 $form->setWrapperLegendMsg( 'watchlistedit-raw-legend' );
 680                 $form->addHeaderText( $this->msg( 'watchlistedit-raw-explain' )->parse() );
 681                 $form->setSubmitCallback( [ $this, 'submitRaw' ] );
 682
 683                 return $form;
 684         }
 685
 686         /**
 687          * Get a form for clearing the watchlist
 688          *
 689          * @return HTMLForm
 690          */
 691         protected function getClearForm() {
 692                 $context = new DerivativeContext( $this->getContext() );
 693                 $context->setTitle( $this->getPageTitle( 'clear' ) ); // Reset subpage
 694                 $form = new HTMLForm( [], $context );
 695                 $form->setSubmitTextMsg( 'watchlistedit-clear-submit' );
 696                 # Used message keys: 'accesskey-watchlistedit-clear-submit', 'tooltip-watchlistedit-clear-submit'
 697                 $form->setSubmitTooltip( 'watchlistedit-clear-submit' );
 698                 $form->setWrapperLegendMsg( 'watchlistedit-clear-legend' );
 699                 $form->addHeaderText( $this->msg( 'watchlistedit-clear-explain' )->parse() );
 700                 $form->setSubmitCallback( [ $this, 'submitClear' ] );
 701                 $form->setSubmitDestructive();
 702
 703                 return $form;
 704         }
 705
 706         /**
 707          * Determine whether we are editing the watchlist, and if so, what
 708          * kind of editing operation
 709          *
 710          * @param WebRequest $request
 711          * @param string $par
 712          * @return int
 713          */
 714         public static function getMode( $request, $par ) {
 715                 $mode = strtolower( $request->getVal( 'action', $par ) );
 716
 717                 switch ( $mode ) {
 718                         case 'clear':
 719                         case self::EDIT_CLEAR:
 720                                 return self::EDIT_CLEAR;
 721                         case 'raw':
 722                         case self::EDIT_RAW:
 723                                 return self::EDIT_RAW;
 724                         case 'edit':
 725                         case self::EDIT_NORMAL:
 726                                 return self::EDIT_NORMAL;
 727                         default:
 728                                 return false;
 729                 }
 730         }
 731
 732         /**
 733          * Build a set of links for convenient navigation
 734          * between watchlist viewing and editing modes
 735          *
 736          * @param Language $lang
 737          * @param LinkRenderer|null $linkRenderer
 738          * @return string
 739          */
 740         public static function buildTools( $lang, LinkRenderer $linkRenderer = null ) {
 741                 if ( !$lang instanceof Language ) {
 742                         // back-compat where the first parameter was $unused
 743                         global $wgLang;
 744                         $lang = $wgLang;
 745                 }
 746                 if ( !$linkRenderer ) {
 747                         $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 748                 }
 749
 750                 $tools = [];
 751                 $modes = [
 752                         'view' => [ 'Watchlist', false ],
 753                         'edit' => [ 'EditWatchlist', false ],
 754                         'raw' => [ 'EditWatchlist', 'raw' ],
 755                         'clear' => [ 'EditWatchlist', 'clear' ],
 756                 ];
 757
 758                 foreach ( $modes as $mode => $arr ) {
 759                         // can use messages 'watchlisttools-view', 'watchlisttools-edit', 'watchlisttools-raw'
 760                         $tools[] = $linkRenderer->makeKnownLink(
 761                                 SpecialPage::getTitleFor( $arr[0], $arr[1] ),
 762                                 wfMessage( "watchlisttools-{$mode}" )->text()
 763                         );
 764                 }
 765
 766                 return Html::rawElement(
 767                         'span',
 768                         [ 'class' => 'mw-watchlist-toollinks' ],
 769                         wfMessage( 'parentheses' )->rawParams( $lang->pipeList( $tools ) )->escaped()
 770                 );
 771         }
 772 }