includes/specials/SpecialWatchlist.php

   1 <?php
   2 /**
   3  * Implements Special:Watchlist
   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 lists last changes made to the wiki,
  28  * limited to user-defined list of titles.
  29  *
  30  * @ingroup SpecialPage
  31  */
  32 class SpecialWatchlist extends ChangesListSpecialPage {
  33         public function __construct( $page = 'Watchlist', $restriction = 'viewmywatchlist' ) {
  34                 parent::__construct( $page, $restriction );
  35         }
  36
  37         public function doesWrites() {
  38                 return true;
  39         }
  40
  41         /**
  42          * Main execution point
  43          *
  44          * @param string $subpage
  45          */
  46         function execute( $subpage ) {
  47                 // Anons don't get a watchlist
  48                 $this->requireLogin( 'watchlistanontext' );
  49
  50                 $output = $this->getOutput();
  51                 $request = $this->getRequest();
  52                 $this->addHelpLink( 'Help:Watching pages' );
  53                 $output->addModules( [
  54                         'mediawiki.special.changeslist.visitedstatus',
  55                 ] );
  56
  57                 $mode = SpecialEditWatchlist::getMode( $request, $subpage );
  58                 if ( $mode !== false ) {
  59                         if ( $mode === SpecialEditWatchlist::EDIT_RAW ) {
  60                                 $title = SpecialPage::getTitleFor( 'EditWatchlist', 'raw' );
  61                         } elseif ( $mode === SpecialEditWatchlist::EDIT_CLEAR ) {
  62                                 $title = SpecialPage::getTitleFor( 'EditWatchlist', 'clear' );
  63                         } else {
  64                                 $title = SpecialPage::getTitleFor( 'EditWatchlist' );
  65                         }
  66
  67                         $output->redirect( $title->getLocalURL() );
  68
  69                         return;
  70                 }
  71
  72                 $this->checkPermissions();
  73
  74                 $user = $this->getUser();
  75                 $opts = $this->getOptions();
  76
  77                 $config = $this->getConfig();
  78                 if ( ( $config->get( 'EnotifWatchlist' ) || $config->get( 'ShowUpdatedMarker' ) )
  79                         && $request->getVal( 'reset' )
  80                         && $request->wasPosted()
  81                 ) {
  82                         $user->clearAllNotifications();
  83                         $output->redirect( $this->getPageTitle()->getFullURL( $opts->getChangedValues() ) );
  84
  85                         return;
  86                 }
  87
  88                 parent::execute( $subpage );
  89         }
  90
  91         /**
  92          * Return an array of subpages that this special page will accept.
  93          *
  94          * @see also SpecialEditWatchlist::getSubpagesForPrefixSearch
  95          * @return string[] subpages
  96          */
  97         public function getSubpagesForPrefixSearch() {
  98                 return [
  99                         'clear',
 100                         'edit',
 101                         'raw',
 102                 ];
 103         }
 104
 105         /**
 106          * Get a FormOptions object containing the default options
 107          *
 108          * @return FormOptions
 109          */
 110         public function getDefaultOptions() {
 111                 $opts = parent::getDefaultOptions();
 112                 $user = $this->getUser();
 113
 114                 $opts->add( 'days', $user->getOption( 'watchlistdays' ), FormOptions::FLOAT );
 115                 $opts->add( 'extended', $user->getBoolOption( 'extendwatchlist' ) );
 116                 if ( $this->getRequest()->getVal( 'action' ) == 'submit' ) {
 117                         // The user has submitted the form, so we dont need the default values
 118                         return $opts;
 119                 }
 120
 121                 $opts->add( 'hideminor', $user->getBoolOption( 'watchlisthideminor' ) );
 122                 $opts->add( 'hidebots', $user->getBoolOption( 'watchlisthidebots' ) );
 123                 $opts->add( 'hideanons', $user->getBoolOption( 'watchlisthideanons' ) );
 124                 $opts->add( 'hideliu', $user->getBoolOption( 'watchlisthideliu' ) );
 125                 $opts->add( 'hidepatrolled', $user->getBoolOption( 'watchlisthidepatrolled' ) );
 126                 $opts->add( 'hidemyself', $user->getBoolOption( 'watchlisthideown' ) );
 127                 $opts->add( 'hidecategorization', $user->getBoolOption( 'watchlisthidecategorization' ) );
 128
 129                 return $opts;
 130         }
 131
 132         /**
 133          * Get custom show/hide filters
 134          *
 135          * @return array Map of filter URL param names to properties (msg/default)
 136          */
 137         protected function getCustomFilters() {
 138                 if ( $this->customFilters === null ) {
 139                         $this->customFilters = parent::getCustomFilters();
 140                         Hooks::run( 'SpecialWatchlistFilters', [ $this, &$this->customFilters ], '1.23' );
 141                 }
 142
 143                 return $this->customFilters;
 144         }
 145
 146         /**
 147          * Fetch values for a FormOptions object from the WebRequest associated with this instance.
 148          *
 149          * Maps old pre-1.23 request parameters Watchlist used to use (different from Recentchanges' ones)
 150          * to the current ones.
 151          *
 152          * @param FormOptions $opts
 153          * @return FormOptions
 154          */
 155         protected function fetchOptionsFromRequest( $opts ) {
 156                 static $compatibilityMap = [
 157                         'hideMinor' => 'hideminor',
 158                         'hideBots' => 'hidebots',
 159                         'hideAnons' => 'hideanons',
 160                         'hideLiu' => 'hideliu',
 161                         'hidePatrolled' => 'hidepatrolled',
 162                         'hideOwn' => 'hidemyself',
 163                 ];
 164
 165                 $params = $this->getRequest()->getValues();
 166                 foreach ( $compatibilityMap as $from => $to ) {
 167                         if ( isset( $params[$from] ) ) {
 168                                 $params[$to] = $params[$from];
 169                                 unset( $params[$from] );
 170                         }
 171                 }
 172
 173                 // Not the prettiest way to achieve this… FormOptions internally depends on data sanitization
 174                 // methods defined on WebRequest and removing this dependency would cause some code duplication.
 175                 $request = new DerivativeRequest( $this->getRequest(), $params );
 176                 $opts->fetchValuesFromRequest( $request );
 177
 178                 return $opts;
 179         }
 180
 181         /**
 182          * Return an array of conditions depending of options set in $opts
 183          *
 184          * @param FormOptions $opts
 185          * @return array
 186          */
 187         public function buildMainQueryConds( FormOptions $opts ) {
 188                 $dbr = $this->getDB();
 189                 $conds = parent::buildMainQueryConds( $opts );
 190
 191                 // Calculate cutoff
 192                 if ( $opts['days'] > 0 ) {
 193                         $conds[] = 'rc_timestamp > ' .
 194                                 $dbr->addQuotes( $dbr->timestamp( time() - intval( $opts['days'] * 86400 ) ) );
 195                 }
 196
 197                 return $conds;
 198         }
 199
 200         /**
 201          * Process the query
 202          *
 203          * @param array $conds
 204          * @param FormOptions $opts
 205          * @return bool|ResultWrapper Result or false (for Recentchangeslinked only)
 206          */
 207         public function doMainQuery( $conds, $opts ) {
 208                 $dbr = $this->getDB();
 209                 $user = $this->getUser();
 210
 211                 # Toggle watchlist content (all recent edits or just the latest)
 212                 if ( $opts['extended'] ) {
 213                         $limitWatchlist = $user->getIntOption( 'wllimit' );
 214                         $usePage = false;
 215                 } else {
 216                         # Top log Ids for a page are not stored
 217                         $nonRevisionTypes = [ RC_LOG ];
 218                         Hooks::run( 'SpecialWatchlistGetNonRevisionTypes', [ &$nonRevisionTypes ] );
 219                         if ( $nonRevisionTypes ) {
 220                                 $conds[] = $dbr->makeList(
 221                                         [
 222                                                 'rc_this_oldid=page_latest',
 223                                                 'rc_type' => $nonRevisionTypes,
 224                                         ],
 225                                         LIST_OR
 226                                 );
 227                         }
 228                         $limitWatchlist = 0;
 229                         $usePage = true;
 230                 }
 231
 232                 $tables = [ 'recentchanges', 'watchlist' ];
 233                 $fields = RecentChange::selectFields();
 234                 $query_options = [ 'ORDER BY' => 'rc_timestamp DESC' ];
 235                 $join_conds = [
 236                         'watchlist' => [
 237                                 'INNER JOIN',
 238                                 [
 239                                         'wl_user' => $user->getId(),
 240                                         'wl_namespace=rc_namespace',
 241                                         'wl_title=rc_title'
 242                                 ],
 243                         ],
 244                 ];
 245
 246                 if ( $this->getConfig()->get( 'ShowUpdatedMarker' ) ) {
 247                         $fields[] = 'wl_notificationtimestamp';
 248                 }
 249                 if ( $limitWatchlist ) {
 250                         $query_options['LIMIT'] = $limitWatchlist;
 251                 }
 252
 253                 $rollbacker = $user->isAllowed( 'rollback' );
 254                 if ( $usePage || $rollbacker ) {
 255                         $tables[] = 'page';
 256                         $join_conds['page'] = [ 'LEFT JOIN', 'rc_cur_id=page_id' ];
 257                         if ( $rollbacker ) {
 258                                 $fields[] = 'page_latest';
 259                         }
 260                 }
 261
 262                 // Log entries with DELETED_ACTION must not show up unless the user has
 263                 // the necessary rights.
 264                 if ( !$user->isAllowed( 'deletedhistory' ) ) {
 265                         $bitmask = LogPage::DELETED_ACTION;
 266                 } elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
 267                         $bitmask = LogPage::DELETED_ACTION | LogPage::DELETED_RESTRICTED;
 268                 } else {
 269                         $bitmask = 0;
 270                 }
 271                 if ( $bitmask ) {
 272                         $conds[] = $dbr->makeList( [
 273                                 'rc_type != ' . RC_LOG,
 274                                 $dbr->bitAnd( 'rc_deleted', $bitmask ) . " != $bitmask",
 275                         ], LIST_OR );
 276                 }
 277
 278                 ChangeTags::modifyDisplayQuery(
 279                         $tables,
 280                         $fields,
 281                         $conds,
 282                         $join_conds,
 283                         $query_options,
 284                         ''
 285                 );
 286
 287                 $this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds, $opts );
 288
 289                 return $dbr->select(
 290                         $tables,
 291                         $fields,
 292                         $conds,
 293                         __METHOD__,
 294                         $query_options,
 295                         $join_conds
 296                 );
 297         }
 298
 299         protected function runMainQueryHook( &$tables, &$fields, &$conds, &$query_options,
 300                 &$join_conds, $opts
 301         ) {
 302                 return parent::runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds, $opts )
 303                         && Hooks::run(
 304                                 'SpecialWatchlistQuery',
 305                                 [ &$conds, &$tables, &$join_conds, &$fields, $opts ],
 306                                 '1.23'
 307                         );
 308         }
 309
 310         /**
 311          * Return a IDatabase object for reading
 312          *
 313          * @return IDatabase
 314          */
 315         protected function getDB() {
 316                 return wfGetDB( DB_REPLICA, 'watchlist' );
 317         }
 318
 319         /**
 320          * Output feed links.
 321          */
 322         public function outputFeedLinks() {
 323                 $user = $this->getUser();
 324                 $wlToken = $user->getTokenFromOption( 'watchlisttoken' );
 325                 if ( $wlToken ) {
 326                         $this->addFeedLinks( [
 327                                 'action' => 'feedwatchlist',
 328                                 'allrev' => 1,
 329                                 'wlowner' => $user->getName(),
 330                                 'wltoken' => $wlToken,
 331                         ] );
 332                 }
 333         }
 334
 335         /**
 336          * Build and output the actual changes list.
 337          *
 338          * @param ResultWrapper $rows Database rows
 339          * @param FormOptions $opts
 340          */
 341         public function outputChangesList( $rows, $opts ) {
 342                 $dbr = $this->getDB();
 343                 $user = $this->getUser();
 344                 $output = $this->getOutput();
 345
 346                 # Show a message about replica DB lag, if applicable
 347                 $lag = wfGetLB()->safeGetLag( $dbr );
 348                 if ( $lag > 0 ) {
 349                         $output->showLagWarning( $lag );
 350                 }
 351
 352                 # If no rows to display, show message before try to render the list
 353                 if ( $rows->numRows() == 0 ) {
 354                         $output->wrapWikiMsg(
 355                                 "<div class='mw-changeslist-empty'>\n$1\n</div>", 'recentchanges-noresult'
 356                         );
 357                         return;
 358                 }
 359
 360                 $dbr->dataSeek( $rows, 0 );
 361
 362                 $list = ChangesList::newFromContext( $this->getContext() );
 363                 $list->setWatchlistDivs();
 364                 $list->initChangesListRows( $rows );
 365                 $dbr->dataSeek( $rows, 0 );
 366
 367                 if ( $this->getConfig()->get( 'RCShowWatchingUsers' )
 368                         && $user->getOption( 'shownumberswatching' )
 369                 ) {
 370                         $watchedItemStore = MediaWikiServices::getInstance()->getWatchedItemStore();
 371                 }
 372
 373                 $s = $list->beginRecentChangesList();
 374                 $userShowHiddenCats = $this->getUser()->getBoolOption( 'showhiddencats' );
 375                 $counter = 1;
 376                 foreach ( $rows as $obj ) {
 377                         # Make RC entry
 378                         $rc = RecentChange::newFromRow( $obj );
 379
 380                         # Skip CatWatch entries for hidden cats based on user preference
 381                         if (
 382                                 $rc->getAttribute( 'rc_type' ) == RC_CATEGORIZE &&
 383                                 !$userShowHiddenCats &&
 384                                 $rc->getParam( 'hidden-cat' )
 385                         ) {
 386                                 continue;
 387                         }
 388
 389                         $rc->counter = $counter++;
 390
 391                         if ( $this->getConfig()->get( 'ShowUpdatedMarker' ) ) {
 392                                 $updated = $obj->wl_notificationtimestamp;
 393                         } else {
 394                                 $updated = false;
 395                         }
 396
 397                         if ( isset( $watchedItemStore ) ) {
 398                                 $rcTitleValue = new TitleValue( (int)$obj->rc_namespace, $obj->rc_title );
 399                                 $rc->numberofWatchingusers = $watchedItemStore->countWatchers( $rcTitleValue );
 400                         } else {
 401                                 $rc->numberofWatchingusers = 0;
 402                         }
 403
 404                         $changeLine = $list->recentChangesLine( $rc, $updated, $counter );
 405                         if ( $changeLine !== false ) {
 406                                 $s .= $changeLine;
 407                         }
 408                 }
 409                 $s .= $list->endRecentChangesList();
 410
 411                 $output->addHTML( $s );
 412         }
 413
 414         /**
 415          * Set the text to be displayed above the changes
 416          *
 417          * @param FormOptions $opts
 418          * @param int $numRows Number of rows in the result to show after this header
 419          */
 420         public function doHeader( $opts, $numRows ) {
 421                 $user = $this->getUser();
 422                 $out = $this->getOutput();
 423
 424                 // if the user wishes, that the watchlist is reloaded, whenever a filter changes,
 425                 // add the module for that
 426                 if ( $user->getBoolOption( 'watchlistreloadautomatically' ) ) {
 427                         $out->addModules( [ 'mediawiki.special.watchlist' ] );
 428                 }
 429
 430                 $out->addSubtitle(
 431                         $this->msg( 'watchlistfor2', $user->getName() )
 432                                 ->rawParams( SpecialEditWatchlist::buildTools(
 433                                         $this->getLanguage(),
 434                                         $this->getLinkRenderer()
 435                                 ) )
 436                 );
 437
 438                 $this->setTopText( $opts );
 439
 440                 $lang = $this->getLanguage();
 441                 if ( $opts['days'] > 0 ) {
 442                         $days = $opts['days'];
 443                 } else {
 444                         $days = $this->getConfig()->get( 'RCMaxAge' ) / ( 3600 * 24 );
 445                 }
 446                 $timestamp = wfTimestampNow();
 447                 $wlInfo = $this->msg( 'wlnote' )->numParams( $numRows, round( $days * 24 ) )->params(
 448                         $lang->userDate( $timestamp, $user ), $lang->userTime( $timestamp, $user )
 449                 )->parse() . "<br />\n";
 450
 451                 $nondefaults = $opts->getChangedValues();
 452                 $cutofflinks = $this->msg( 'wlshowtime' ) . ' ' . $this->cutoffselector( $opts );
 453
 454                 # Spit out some control panel links
 455                 $filters = [
 456                         'hideminor' => 'wlshowhideminor',
 457                         'hidebots' => 'wlshowhidebots',
 458                         'hideanons' => 'wlshowhideanons',
 459                         'hideliu' => 'wlshowhideliu',
 460                         'hidemyself' => 'wlshowhidemine',
 461                         'hidepatrolled' => 'wlshowhidepatr'
 462                 ];
 463
 464                 if ( $this->getConfig()->get( 'RCWatchCategoryMembership' ) ) {
 465                         $filters['hidecategorization'] = 'wlshowhidecategorization';
 466                 }
 467
 468                 foreach ( $this->getCustomFilters() as $key => $params ) {
 469                         $filters[$key] = $params['msg'];
 470                 }
 471                 // Disable some if needed
 472                 if ( !$user->useRCPatrol() ) {
 473                         unset( $filters['hidepatrolled'] );
 474                 }
 475
 476                 $links = [];
 477                 foreach ( $filters as $name => $msg ) {
 478                         $links[] = $this->showHideCheck( $nondefaults, $msg, $name, $opts[$name] );
 479                 }
 480
 481                 $hiddenFields = $nondefaults;
 482                 $hiddenFields['action'] = 'submit';
 483                 unset( $hiddenFields['namespace'] );
 484                 unset( $hiddenFields['invert'] );
 485                 unset( $hiddenFields['associated'] );
 486                 unset( $hiddenFields['days'] );
 487                 foreach ( $filters as $key => $value ) {
 488                         unset( $hiddenFields[$key] );
 489                 }
 490
 491                 # Create output
 492                 $form = '';
 493
 494                 # Namespace filter and put the whole form together.
 495                 $form .= $wlInfo;
 496                 $form .= $cutofflinks;
 497                 $form .= $this->msg( 'watchlist-hide' ) .
 498                         $this->msg( 'colon-separator' )->escaped() .
 499                         implode( ' ', $links );
 500                 $form .= "\n<br />\n";
 501                 $form .= Html::namespaceSelector(
 502                         [
 503                                 'selected' => $opts['namespace'],
 504                                 'all' => '',
 505                                 'label' => $this->msg( 'namespace' )->text()
 506                         ], [
 507                                 'name' => 'namespace',
 508                                 'id' => 'namespace',
 509                                 'class' => 'namespaceselector',
 510                         ]
 511                 ) . "\n";
 512                 $form .= '<span class="mw-input-with-label">' . Xml::checkLabel(
 513                         $this->msg( 'invert' )->text(),
 514                         'invert',
 515                         'nsinvert',
 516                         $opts['invert'],
 517                         [ 'title' => $this->msg( 'tooltip-invert' )->text() ]
 518                 ) . "</span>\n";
 519                 $form .= '<span class="mw-input-with-label">' . Xml::checkLabel(
 520                         $this->msg( 'namespace_association' )->text(),
 521                         'associated',
 522                         'nsassociated',
 523                         $opts['associated'],
 524                         [ 'title' => $this->msg( 'tooltip-namespace_association' )->text() ]
 525                 ) . "</span>\n";
 526                 $form .= Xml::submitButton( $this->msg( 'watchlist-submit' )->text() ) . "\n";
 527                 foreach ( $hiddenFields as $key => $value ) {
 528                         $form .= Html::hidden( $key, $value ) . "\n";
 529                 }
 530                 $form .= Xml::closeElement( 'fieldset' ) . "\n";
 531                 $form .= Xml::closeElement( 'form' ) . "\n";
 532                 $this->getOutput()->addHTML( $form );
 533
 534                 $this->setBottomText( $opts );
 535         }
 536
 537         function cutoffselector( $options ) {
 538                 // Cast everything to strings immediately, so that we know all of the values have the same
 539                 // precision, and can be compared with '==='. 2/24 has a few more decimal places than its
 540                 // default string representation, for example, and would confuse comparisons.
 541
 542                 // Misleadingly, the 'days' option supports hours too.
 543                 $days = array_map( 'strval', [ 1/24, 2/24, 6/24, 12/24, 1, 3, 7 ] );
 544
 545                 $userWatchlistOption = (string)$this->getUser()->getOption( 'watchlistdays' );
 546                 // add the user preference, if it isn't available already
 547                 if ( !in_array( $userWatchlistOption, $days ) && $userWatchlistOption !== '0' ) {
 548                         $days[] = $userWatchlistOption;
 549                 }
 550
 551                 $maxDays = (string)( $this->getConfig()->get( 'RCMaxAge' ) / ( 3600 * 24 ) );
 552                 // add the maximum possible value, if it isn't available already
 553                 if ( !in_array( $maxDays, $days ) ) {
 554                         $days[] = $maxDays;
 555                 }
 556
 557                 $selected = (string)$options['days'];
 558                 if ( $selected <= 0 ) {
 559                         $selected = $maxDays;
 560                 }
 561
 562                 // add the currently selected value, if it isn't available already
 563                 if ( !in_array( $selected, $days ) ) {
 564                         $days[] = $selected;
 565                 }
 566
 567                 $select = new XmlSelect( 'days', 'days', $selected );
 568
 569                 asort( $days );
 570                 foreach ( $days as $value ) {
 571                         if ( $value < 1 ) {
 572                                 $name = $this->msg( 'hours' )->numParams( $value * 24 )->text();
 573                         } else {
 574                                 $name = $this->msg( 'days' )->numParams( $value )->text();
 575                         }
 576                         $select->addOption( $name, $value );
 577                 }
 578
 579                 return $select->getHTML() . "\n<br />\n";
 580         }
 581
 582         function setTopText( FormOptions $opts ) {
 583                 $nondefaults = $opts->getChangedValues();
 584                 $form = "";
 585                 $user = $this->getUser();
 586
 587                 $numItems = $this->countItems();
 588                 $showUpdatedMarker = $this->getConfig()->get( 'ShowUpdatedMarker' );
 589
 590                 // Show watchlist header
 591                 $form .= "<p>";
 592                 if ( $numItems == 0 ) {
 593                         $form .= $this->msg( 'nowatchlist' )->parse() . "\n";
 594                 } else {
 595                         $form .= $this->msg( 'watchlist-details' )->numParams( $numItems )->parse() . "\n";
 596                         if ( $this->getConfig()->get( 'EnotifWatchlist' )
 597                                 && $user->getOption( 'enotifwatchlistpages' )
 598                         ) {
 599                                 $form .= $this->msg( 'wlheader-enotif' )->parse() . "\n";
 600                         }
 601                         if ( $showUpdatedMarker ) {
 602                                 $form .= $this->msg( 'wlheader-showupdated' )->parse() . "\n";
 603                         }
 604                 }
 605                 $form .= "</p>";
 606
 607                 if ( $numItems > 0 && $showUpdatedMarker ) {
 608                         $form .= Xml::openElement( 'form', [ 'method' => 'post',
 609                                 'action' => $this->getPageTitle()->getLocalURL(),
 610                                 'id' => 'mw-watchlist-resetbutton' ] ) . "\n" .
 611                         Xml::submitButton( $this->msg( 'enotif_reset' )->text(), [ 'name' => 'dummy' ] ) . "\n" .
 612                         Html::hidden( 'reset', 'all' ) . "\n";
 613                         foreach ( $nondefaults as $key => $value ) {
 614                                 $form .= Html::hidden( $key, $value ) . "\n";
 615                         }
 616                         $form .= Xml::closeElement( 'form' ) . "\n";
 617                 }
 618
 619                 $form .= Xml::openElement( 'form', [
 620                         'method' => 'get',
 621                         'action' => wfScript(),
 622                         'id' => 'mw-watchlist-form'
 623                 ] );
 624                 $form .= Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() );
 625                 $form .= Xml::fieldset(
 626                         $this->msg( 'watchlist-options' )->text(),
 627                         false,
 628                         [ 'id' => 'mw-watchlist-options' ]
 629                 );
 630
 631                 $form .= $this->makeLegend();
 632
 633                 $this->getOutput()->addHTML( $form );
 634         }
 635
 636         protected function showHideCheck( $options, $message, $name, $value ) {
 637                 $options[$name] = 1 - (int)$value;
 638
 639                 return '<span class="mw-input-with-label">' . Xml::checkLabel(
 640                         $this->msg( $message, '' )->text(),
 641                         $name,
 642                         $name,
 643                         (int)$value
 644                 ) . '</span>';
 645         }
 646
 647         /**
 648          * Count the number of paired items on a user's watchlist.
 649          * The assumption made here is that when a subject page is watched a talk page is also watched.
 650          * Hence the number of individual items is halved.
 651          *
 652          * @return int
 653          */
 654         protected function countItems() {
 655                 $store = MediaWikiServices::getInstance()->getWatchedItemStore();
 656                 $count = $store->countWatchedItems( $this->getUser() );
 657                 return floor( $count / 2 );
 658         }
 659 }