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 /**
  30  * Provides the UI through which users can perform editing
  31  * operations on their watchlist
  32  *
  33  * @ingroup SpecialPage
  34  * @ingroup Watchlist
  35  * @author Rob Church <robchur@gmail.com>
  36  */
  37 class SpecialEditWatchlist extends UnlistedSpecialPage {
  38
  39         /**
  40          * Editing modes
  41          */
  42         const EDIT_CLEAR = 1;
  43         const EDIT_RAW = 2;
  44         const EDIT_NORMAL = 3;
  45
  46         protected $successMessage;
  47
  48         protected $toc;
  49
  50         private $badItems = array();
  51
  52         public function __construct(){
  53                 parent::__construct( 'EditWatchlist' );
  54         }
  55
  56         /**
  57          * Main execution point
  58          *
  59          * @param $mode int
  60          */
  61         public function execute( $mode ) {
  62                 $this->setHeaders();
  63
  64                 $out = $this->getOutput();
  65
  66                 # Anons don't get a watchlist
  67                 if( $this->getUser()->isAnon() ) {
  68                         $out->setPageTitle( $this->msg( 'watchnologin' ) );
  69                         $llink = Linker::linkKnown(
  70                                 SpecialPage::getTitleFor( 'Userlogin' ),
  71                                 $this->msg( 'loginreqlink' )->escaped(),
  72                                 array(),
  73                                 array( 'returnto' => $this->getTitle()->getPrefixedText() )
  74                         );
  75                         $out->addHTML( $this->msg( 'watchlistanontext' )->rawParams( $llink )->parse() );
  76                         return;
  77                 }
  78
  79                 $this->checkPermissions();
  80
  81                 $this->outputHeader();
  82
  83                 $out->addSubtitle( $this->msg( 'watchlistfor2', $this->getUser()->getName()
  84                         )->rawParams( SpecialEditWatchlist::buildTools( null ) ) );
  85
  86                 # B/C: $mode used to be waaay down the parameter list, and the first parameter
  87                 # was $wgUser
  88                 if( $mode instanceof User ){
  89                         $args = func_get_args();
  90                         if( count( $args >= 4 ) ){
  91                                 $mode = $args[3];
  92                         }
  93                 }
  94                 $mode = self::getMode( $this->getRequest(), $mode );
  95
  96                 switch( $mode ) {
  97                         case self::EDIT_CLEAR:
  98                                 // The "Clear" link scared people too much.
  99                                 // Pass on to the raw editor, from which it's very easy to clear.
 100
 101                         case self::EDIT_RAW:
 102                                 $out->setPageTitle( $this->msg( 'watchlistedit-raw-title' ) );
 103                                 $form = $this->getRawForm();
 104                                 if( $form->show() ){
 105                                         $out->addHTML( $this->successMessage );
 106                                         $out->returnToMain();
 107                                 }
 108                                 break;
 109
 110                         case self::EDIT_NORMAL:
 111                         default:
 112                                 $out->setPageTitle( $this->msg( 'watchlistedit-normal-title' ) );
 113                                 $form = $this->getNormalForm();
 114                                 if( $form->show() ){
 115                                         $out->addHTML( $this->successMessage );
 116                                         $out->returnToMain();
 117                                 } elseif ( $this->toc !== false ) {
 118                                         $out->prependHTML( $this->toc );
 119                                 }
 120                                 break;
 121                 }
 122         }
 123
 124         /**
 125          * Extract a list of titles from a blob of text, returning
 126          * (prefixed) strings; unwatchable titles are ignored
 127          *
 128          * @param $list String
 129          * @return array
 130          */
 131         private function extractTitles( $list ) {
 132                 $list = explode( "\n", trim( $list ) );
 133                 if( !is_array( $list ) ) {
 134                         return array();
 135                 }
 136                 $titles = array();
 137                 foreach( $list as $text ) {
 138                         $text = trim( $text );
 139                         if( strlen( $text ) > 0 ) {
 140                                 $title = Title::newFromText( $text );
 141                                 if( $title instanceof Title && $title->isWatchable() ) {
 142                                         $titles[] = $title;
 143                                 }
 144                         }
 145                 }
 146
 147                 GenderCache::singleton()->doTitlesArray( $titles );
 148
 149                 $list = array();
 150                 foreach( $titles as $title ) {
 151                         $list[] = $title->getPrefixedText();
 152                 }
 153                 return array_unique( $list );
 154         }
 155
 156         public function submitRaw( $data ){
 157                 $wanted = $this->extractTitles( $data['Titles'] );
 158                 $current = $this->getWatchlist();
 159
 160                 if( count( $wanted ) > 0 ) {
 161                         $toWatch = array_diff( $wanted, $current );
 162                         $toUnwatch = array_diff( $current, $wanted );
 163                         $this->watchTitles( $toWatch );
 164                         $this->unwatchTitles( $toUnwatch );
 165                         $this->getUser()->invalidateCache();
 166
 167                         if( count( $toWatch ) > 0 || count( $toUnwatch ) > 0 ){
 168                                 $this->successMessage = $this->msg( 'watchlistedit-raw-done' )->parse();
 169                         } else {
 170                                 return false;
 171                         }
 172
 173                         if( count( $toWatch ) > 0 ) {
 174                                 $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-added'
 175                                         )->numParams( count( $toWatch ) )->parse();
 176                                 $this->showTitles( $toWatch, $this->successMessage );
 177                         }
 178
 179                         if( count( $toUnwatch ) > 0 ) {
 180                                 $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-removed'
 181                                         )->numParams( count( $toUnwatch ) )->parse();
 182                                 $this->showTitles( $toUnwatch, $this->successMessage );
 183                         }
 184                 } else {
 185                         $this->clearWatchlist();
 186                         $this->getUser()->invalidateCache();
 187
 188                         if( count( $current ) > 0 ){
 189                                 $this->successMessage = $this->msg( 'watchlistedit-raw-done' )->parse();
 190                         } else {
 191                                 return false;
 192                         }
 193
 194                         $this->successMessage .= ' ' . $this->msg( 'watchlistedit-raw-removed'
 195                                 )->numParams( count( $current ) )->parse();
 196                         $this->showTitles( $current, $this->successMessage );
 197                 }
 198                 return true;
 199         }
 200
 201         /**
 202          * Print out a list of linked titles
 203          *
 204          * $titles can be an array of strings or Title objects; the former
 205          * is preferred, since Titles are very memory-heavy
 206          *
 207          * @param $titles array of strings, or Title objects
 208          * @param $output String
 209          */
 210         private function showTitles( $titles, &$output ) {
 211                 $talk = $this->msg( 'talkpagelinktext' )->escaped();
 212                 // Do a batch existence check
 213                 $batch = new LinkBatch();
 214                 foreach( $titles as $title ) {
 215                         if( !$title instanceof Title ) {
 216                                 $title = Title::newFromText( $title );
 217                         }
 218                         if( $title instanceof Title ) {
 219                                 $batch->addObj( $title );
 220                                 $batch->addObj( $title->getTalkPage() );
 221                         }
 222                 }
 223                 $batch->execute();
 224                 // Print out the list
 225                 $output .= "<ul>\n";
 226                 foreach( $titles as $title ) {
 227                         if( !$title instanceof Title ) {
 228                                 $title = Title::newFromText( $title );
 229                         }
 230                         if( $title instanceof Title ) {
 231                                 $output .= "<li>"
 232                                         . Linker::link( $title )
 233                                         . ' (' . Linker::link( $title->getTalkPage(), $talk )
 234                                         . ")</li>\n";
 235                         }
 236                 }
 237                 $output .= "</ul>\n";
 238         }
 239
 240         /**
 241          * Prepare a list of titles on a user's watchlist (excluding talk pages)
 242          * and return an array of (prefixed) strings
 243          *
 244          * @return array
 245          */
 246         private function getWatchlist() {
 247                 $list = array();
 248                 $dbr = wfGetDB( DB_MASTER );
 249                 $res = $dbr->select(
 250                         'watchlist',
 251                         array(
 252                                 'wl_namespace', 'wl_title'
 253                         ), array(
 254                                 'wl_user' => $this->getUser()->getId(),
 255                         ),
 256                         __METHOD__
 257                 );
 258                 if( $res->numRows() > 0 ) {
 259                         $titles = array();
 260                         foreach ( $res as $row ) {
 261                                 $title = Title::makeTitleSafe( $row->wl_namespace, $row->wl_title );
 262                                 if ( $this->checkTitle( $title, $row->wl_namespace, $row->wl_title )
 263                                         && !$title->isTalkPage()
 264                                 ) {
 265                                         $titles[] = $title;
 266                                 }
 267                         }
 268                         $res->free();
 269
 270                         GenderCache::singleton()->doTitlesArray( $titles );
 271
 272                         foreach( $titles as $title ) {
 273                                 $list[] = $title->getPrefixedText();
 274                         }
 275                 }
 276                 $this->cleanupWatchlist();
 277                 return $list;
 278         }
 279
 280         /**
 281          * Get a list of titles on a user's watchlist, excluding talk pages,
 282          * and return as a two-dimensional array with namespace and title.
 283          *
 284          * @return array
 285          */
 286         private function getWatchlistInfo() {
 287                 $titles = array();
 288                 $dbr = wfGetDB( DB_MASTER );
 289
 290                 $res = $dbr->select(
 291                         array( 'watchlist' ),
 292                         array( 'wl_namespace',  'wl_title' ),
 293                         array( 'wl_user' => $this->getUser()->getId() ),
 294                         __METHOD__,
 295                         array( 'ORDER BY' => array( 'wl_namespace', 'wl_title' ) )
 296                 );
 297
 298                 $lb = new LinkBatch();
 299                 foreach ( $res as $row ) {
 300                         $lb->add( $row->wl_namespace, $row->wl_title );
 301                         if ( !MWNamespace::isTalk( $row->wl_namespace ) ) {
 302                                 $titles[$row->wl_namespace][$row->wl_title] = 1;
 303                         }
 304                 }
 305
 306                 $lb->execute();
 307                 return $titles;
 308         }
 309
 310         /**
 311          * Validates watchlist entry
 312          *
 313          * @param Title $title
 314          * @param int $namespace
 315          * @param String $dbKey
 316          * @return bool: Whether this item is valid
 317          */
 318         private function checkTitle( $title, $namespace, $dbKey ) {
 319                 if ( $title
 320                         && ( $title->isExternal()
 321                                 || $title->getNamespace() < 0
 322                         )
 323                 ) {
 324                         $title = false; // unrecoverable
 325                 }
 326                 if ( !$title
 327                         || $title->getNamespace() != $namespace
 328                         || $title->getDBkey() != $dbKey
 329                 ) {
 330                         $this->badItems[] = array( $title, $namespace, $dbKey );
 331                 }
 332                 return (bool)$title;
 333         }
 334
 335         /**
 336          * Attempts to clean up broken items
 337          */
 338         private function cleanupWatchlist() {
 339                 if( !count( $this->badItems ) ) {
 340                         return; //nothing to do
 341                 }
 342                 $dbw = wfGetDB( DB_MASTER );
 343                 $user = $this->getUser();
 344                 foreach ( $this->badItems as $row ) {
 345                         list( $title, $namespace, $dbKey ) = $row;
 346                         wfDebug( "User {$user->getName()} has broken watchlist item ns($namespace):$dbKey, "
 347                                 . ( $title ? 'cleaning up' : 'deleting' ) . ".\n"
 348                         );
 349
 350                         $dbw->delete( 'watchlist',
 351                                 array(
 352                                         'wl_user' => $user->getId(),
 353                                         'wl_namespace' => $namespace,
 354                                         'wl_title' => $dbKey,
 355                                 ),
 356                                 __METHOD__
 357                         );
 358
 359                         // Can't just do an UPDATE instead of DELETE/INSERT due to unique index
 360                         if ( $title ) {
 361                                 $user->addWatch( $title );
 362                         }
 363                 }
 364         }
 365
 366         /**
 367          * Remove all titles from a user's watchlist
 368          */
 369         private function clearWatchlist() {
 370                 $dbw = wfGetDB( DB_MASTER );
 371                 $dbw->delete(
 372                         'watchlist',
 373                         array( 'wl_user' => $this->getUser()->getId() ),
 374                         __METHOD__
 375                 );
 376         }
 377
 378         /**
 379          * Add a list of titles to a user's watchlist
 380          *
 381          * $titles can be an array of strings or Title objects; the former
 382          * is preferred, since Titles are very memory-heavy
 383          *
 384          * @param $titles Array of strings, or Title objects
 385          */
 386         private function watchTitles( $titles ) {
 387                 $dbw = wfGetDB( DB_MASTER );
 388                 $rows = array();
 389                 foreach( $titles as $title ) {
 390                         if( !$title instanceof Title ) {
 391                                 $title = Title::newFromText( $title );
 392                         }
 393                         if( $title instanceof Title ) {
 394                                 $rows[] = array(
 395                                         'wl_user' => $this->getUser()->getId(),
 396                                         'wl_namespace' => ( $title->getNamespace() & ~1 ),
 397                                         'wl_title' => $title->getDBkey(),
 398                                         'wl_notificationtimestamp' => null,
 399                                 );
 400                                 $rows[] = array(
 401                                         'wl_user' => $this->getUser()->getId(),
 402                                         'wl_namespace' => ( $title->getNamespace() | 1 ),
 403                                         'wl_title' => $title->getDBkey(),
 404                                         'wl_notificationtimestamp' => null,
 405                                 );
 406                         }
 407                 }
 408                 $dbw->insert( 'watchlist', $rows, __METHOD__, 'IGNORE' );
 409         }
 410
 411         /**
 412          * Remove a list of titles from a user's watchlist
 413          *
 414          * $titles can be an array of strings or Title objects; the former
 415          * is preferred, since Titles are very memory-heavy
 416          *
 417          * @param $titles Array of strings, or Title objects
 418          */
 419         private function unwatchTitles( $titles ) {
 420                 $dbw = wfGetDB( DB_MASTER );
 421                 foreach( $titles as $title ) {
 422                         if( !$title instanceof Title ) {
 423                                 $title = Title::newFromText( $title );
 424                         }
 425                         if( $title instanceof Title ) {
 426                                 $dbw->delete(
 427                                         'watchlist',
 428                                         array(
 429                                                 'wl_user' => $this->getUser()->getId(),
 430                                                 'wl_namespace' => ( $title->getNamespace() & ~1 ),
 431                                                 'wl_title' => $title->getDBkey(),
 432                                         ),
 433                                         __METHOD__
 434                                 );
 435                                 $dbw->delete(
 436                                         'watchlist',
 437                                         array(
 438                                                 'wl_user' => $this->getUser()->getId(),
 439                                                 'wl_namespace' => ( $title->getNamespace() | 1 ),
 440                                                 'wl_title' => $title->getDBkey(),
 441                                         ),
 442                                         __METHOD__
 443                                 );
 444                                 $page = WikiPage::factory( $title );
 445                                 wfRunHooks( 'UnwatchArticleComplete', array( $this->getUser(), &$page ) );
 446                         }
 447                 }
 448         }
 449
 450         public function submitNormal( $data ) {
 451                 $removed = array();
 452
 453                 foreach( $data as $titles ) {
 454                         $this->unwatchTitles( $titles );
 455                         $removed = array_merge( $removed, $titles );
 456                 }
 457
 458                 if( count( $removed ) > 0 ) {
 459                         $this->successMessage = $this->msg( 'watchlistedit-normal-done'
 460                                 )->numParams( count( $removed ) )->parse();
 461                         $this->showTitles( $removed, $this->successMessage );
 462                         return true;
 463                 } else {
 464                         return false;
 465                 }
 466         }
 467
 468         /**
 469          * Get the standard watchlist editing form
 470          *
 471          * @return HTMLForm
 472          */
 473         protected function getNormalForm(){
 474                 global $wgContLang;
 475
 476                 $fields = array();
 477                 $count = 0;
 478
 479                 foreach( $this->getWatchlistInfo() as $namespace => $pages ){
 480                         if ( $namespace >= 0 ) {
 481                                 $fields['TitlesNs'.$namespace] = array(
 482                                         'class' => 'EditWatchlistCheckboxSeriesField',
 483                                         'options' => array(),
 484                                         'section' => "ns$namespace",
 485                                 );
 486                         }
 487
 488                         foreach( array_keys( $pages ) as $dbkey ){
 489                                 $title = Title::makeTitleSafe( $namespace, $dbkey );
 490                                 if ( $this->checkTitle( $title, $namespace, $dbkey ) ) {
 491                                         $text = $this->buildRemoveLine( $title );
 492                                         $fields['TitlesNs'.$namespace]['options'][$text] = htmlspecialchars( $title->getPrefixedText() );
 493                                         $count++;
 494                                 }
 495                         }
 496                 }
 497                 $this->cleanupWatchlist();
 498
 499                 if ( count( $fields ) > 1 && $count > 30 ) {
 500                         $this->toc = Linker::tocIndent();
 501                         $tocLength = 0;
 502                         foreach( $fields as $key => $data ) {
 503
 504                                 # strip out the 'ns' prefix from the section name:
 505                                 $ns = substr( $data['section'], 2 );
 506
 507                                 $nsText = ($ns == NS_MAIN)
 508                                         ? $this->msg( 'blanknamespace' )->escaped()
 509                                         : htmlspecialchars( $wgContLang->getFormattedNsText( $ns ) );
 510                                 $this->toc .= Linker::tocLine( "editwatchlist-{$data['section']}", $nsText,
 511                                         $this->getLanguage()->formatNum( ++$tocLength ), 1 ) . Linker::tocLineEnd();
 512                         }
 513                         $this->toc = Linker::tocList( $this->toc );
 514                 } else {
 515                         $this->toc = false;
 516                 }
 517
 518                 $form = new EditWatchlistNormalHTMLForm( $fields, $this->getContext() );
 519                 $form->setTitle( $this->getTitle() );
 520                 $form->setSubmitTextMsg( 'watchlistedit-normal-submit' );
 521                 # Used message keys: 'accesskey-watchlistedit-normal-submit', 'tooltip-watchlistedit-normal-submit'
 522                 $form->setSubmitTooltip('watchlistedit-normal-submit');
 523                 $form->setWrapperLegendMsg( 'watchlistedit-normal-legend' );
 524                 $form->addHeaderText( $this->msg( 'watchlistedit-normal-explain' )->parse() );
 525                 $form->setSubmitCallback( array( $this, 'submitNormal' ) );
 526                 return $form;
 527         }
 528
 529         /**
 530          * Build the label for a checkbox, with a link to the title, and various additional bits
 531          *
 532          * @param $title Title
 533          * @return string
 534          */
 535         private function buildRemoveLine( $title ) {
 536                 $link = Linker::link( $title );
 537                 if( $title->isRedirect() ) {
 538                         // Linker already makes class mw-redirect, so this is redundant
 539                         $link = '<span class="watchlistredir">' . $link . '</span>';
 540                 }
 541                 $tools[] = Linker::link( $title->getTalkPage(), $this->msg( 'talkpagelinktext' )->escaped() );
 542                 if( $title->exists() ) {
 543                         $tools[] = Linker::linkKnown(
 544                                 $title,
 545                                 $this->msg( 'history_short' )->escaped(),
 546                                 array(),
 547                                 array( 'action' => 'history' )
 548                         );
 549                 }
 550                 if( $title->getNamespace() == NS_USER && !$title->isSubpage() ) {
 551                         $tools[] = Linker::linkKnown(
 552                                 SpecialPage::getTitleFor( 'Contributions', $title->getText() ),
 553                                 $this->msg( 'contributions' )->escaped()
 554                         );
 555                 }
 556
 557                 wfRunHooks( 'WatchlistEditorBuildRemoveLine', array( &$tools, $title, $title->isRedirect(), $this->getSkin() ) );
 558
 559                 return $link . " (" . $this->getLanguage()->pipeList( $tools ) . ")";
 560         }
 561
 562         /**
 563          * Get a form for editing the watchlist in "raw" mode
 564          *
 565          * @return HTMLForm
 566          */
 567         protected function getRawForm(){
 568                 $titles = implode( $this->getWatchlist(), "\n" );
 569                 $fields = array(
 570                         'Titles' => array(
 571                                 'type' => 'textarea',
 572                                 'label-message' => 'watchlistedit-raw-titles',
 573                                 'default' => $titles,
 574                         ),
 575                 );
 576                 $form = new HTMLForm( $fields, $this->getContext() );
 577                 $form->setTitle( $this->getTitle( 'raw' ) );
 578                 $form->setSubmitTextMsg( 'watchlistedit-raw-submit' );
 579                 # Used message keys: 'accesskey-watchlistedit-raw-submit', 'tooltip-watchlistedit-raw-submit'
 580                 $form->setSubmitTooltip('watchlistedit-raw-submit');
 581                 $form->setWrapperLegendMsg( 'watchlistedit-raw-legend' );
 582                 $form->addHeaderText( $this->msg( 'watchlistedit-raw-explain' )->parse() );
 583                 $form->setSubmitCallback( array( $this, 'submitRaw' ) );
 584                 return $form;
 585         }
 586
 587         /**
 588          * Determine whether we are editing the watchlist, and if so, what
 589          * kind of editing operation
 590          *
 591          * @param $request WebRequest
 592          * @param $par mixed
 593          * @return int
 594          */
 595         public static function getMode( $request, $par ) {
 596                 $mode = strtolower( $request->getVal( 'action', $par ) );
 597                 switch( $mode ) {
 598                         case 'clear':
 599                         case self::EDIT_CLEAR:
 600                                 return self::EDIT_CLEAR;
 601
 602                         case 'raw':
 603                         case self::EDIT_RAW:
 604                                 return self::EDIT_RAW;
 605
 606                         case 'edit':
 607                         case self::EDIT_NORMAL:
 608                                 return self::EDIT_NORMAL;
 609
 610                         default:
 611                                 return false;
 612                 }
 613         }
 614
 615         /**
 616          * Build a set of links for convenient navigation
 617          * between watchlist viewing and editing modes
 618          *
 619          * @param $unused
 620          * @return string
 621          */
 622         public static function buildTools( $unused ) {
 623                 global $wgLang;
 624
 625                 $tools = array();
 626                 $modes = array(
 627                         'view' => array( 'Watchlist', false ),
 628                         'edit' => array( 'EditWatchlist', false ),
 629                         'raw' => array( 'EditWatchlist', 'raw' ),
 630                 );
 631                 foreach( $modes as $mode => $arr ) {
 632                         // can use messages 'watchlisttools-view', 'watchlisttools-edit', 'watchlisttools-raw'
 633                         $tools[] = Linker::linkKnown(
 634                                 SpecialPage::getTitleFor( $arr[0], $arr[1] ),
 635                                 wfMsgHtml( "watchlisttools-{$mode}" )
 636                         );
 637                 }
 638                 return Html::rawElement( 'span',
 639                                         array( 'class' => 'mw-watchlist-toollinks' ),
 640                                         wfMsg( 'parentheses', $wgLang->pipeList( $tools ) ) );
 641         }
 642 }
 643
 644 # B/C since 1.18
 645 class WatchlistEditor extends SpecialEditWatchlist {}
 646
 647 /**
 648  * Extend HTMLForm purely so we can have a more sane way of getting the section headers
 649  */
 650 class EditWatchlistNormalHTMLForm extends HTMLForm {
 651         public function getLegend( $namespace ){
 652                 $namespace = substr( $namespace, 2 );
 653                 return $namespace == NS_MAIN
 654                         ? $this->msg( 'blanknamespace' )->escaped()
 655                         : htmlspecialchars( $this->getContext()->getLanguage()->getFormattedNsText( $namespace ) );
 656         }
 657         public function getBody() {
 658                 return $this->displaySection( $this->mFieldTree, '', 'editwatchlist-' );
 659         }
 660 }
 661
 662 class EditWatchlistCheckboxSeriesField extends HTMLMultiSelectField {
 663         /**
 664          * HTMLMultiSelectField throws validation errors if we get input data
 665          * that doesn't match the data set in the form setup. This causes
 666          * problems if something gets removed from the watchlist while the
 667          * form is open (bug 32126), but we know that invalid items will
 668          * be harmless so we can override it here.
 669          *
 670          * @param $value String the value the field was submitted with
 671          * @param $alldata Array the data collected from the form
 672          * @return Mixed Bool true on success, or String error to display.
 673          */
 674         function validate( $value, $alldata ) {
 675                 // Need to call into grandparent to be a good citizen. :)
 676                 return HTMLFormField::validate( $value, $alldata );
 677         }
 678 }