includes/SpecialWatchlist.php

   1 <?php
   2 /**
   3  *
   4  * @package MediaWiki
   5  * @subpackage SpecialPage
   6  */
   7
   8 /**
   9  *
  10  */
  11 require_once( 'SpecialRecentchanges.php' );
  12
  13 /**
  14  * Constructor
  15  * @todo Document $par parameter.
  16  * @param $par String: FIXME
  17  */
  18 function wfSpecialWatchlist( $par ) {
  19         global $wgUser, $wgOut, $wgLang, $wgMemc, $wgRequest, $wgContLang;
  20         global $wgUseWatchlistCache, $wgWLCacheTimeout, $wgDBname;
  21         global $wgRCShowWatchingUsers, $wgEnotifWatchlist, $wgShowUpdatedMarker;
  22         global $wgEnotifWatchlist;
  23         $fname = 'wfSpecialWatchlist';
  24
  25         $wgOut->setPagetitle( wfMsg( 'watchlist' ) );
  26         $sub = htmlspecialchars( wfMsg( 'watchlistsub', $wgUser->getName() ) );
  27         $wgOut->setSubtitle( $sub );
  28         $wgOut->setRobotpolicy( 'noindex,nofollow' );
  29
  30         $specialTitle = Title::makeTitle( NS_SPECIAL, 'Watchlist' );
  31
  32         if( $wgUser->isAnon() ) {
  33                 $wgOut->addWikiText( wfMsg( 'nowatchlist' ) );
  34                 return;
  35         }
  36
  37         if( wlHandleClear( $wgOut, $wgRequest, $par ) ) {
  38                 return;
  39         }
  40
  41         $defaults = array(
  42         /* float */ 'days' => floatval( $wgUser->getOption( 'watchlistdays' ) ), /* 3.0 or 0.5, watch further below */
  43         /* bool  */ 'hideOwn' => (int)$wgUser->getBoolOption( 'watchlisthideown' ),
  44         /* bool  */ 'hideBots' => (int)$wgUser->getBoolOption( 'watchlisthidebots' ),
  45         /* ?     */ 'namespace' => 'all',
  46         );
  47
  48         extract($defaults);
  49
  50         # Extract variables from the request, falling back to user preferences or
  51         # other default values if these don't exist
  52         $prefs['days'    ] = floatval( $wgUser->getOption( 'watchlistdays' ) );
  53         $prefs['hideown' ] = $wgUser->getBoolOption( 'watchlisthideown' );
  54         $prefs['hidebots'] = $wgUser->getBoolOption( 'watchlisthidebots' );
  55
  56         # Get query variables
  57         $days = $wgRequest->getVal( 'days', $prefs['days'] );
  58         $hideOwn = $wgRequest->getBool( 'hideOwn', $prefs['hideown'] );
  59         $hideBots = $wgRequest->getBool( 'hideBots', $prefs['hidebots'] );
  60
  61         # Get namespace value, if supplied, and prepare a WHERE fragment
  62         $nameSpace = $wgRequest->getIntOrNull( 'namespace' );
  63         if( !is_null( $nameSpace ) ) {
  64                 $nameSpace = intval( $nameSpace );
  65                 $nameSpaceClause = " AND rc_namespace = $nameSpace";
  66         } else {
  67                 $nameSpace = '';
  68                 $nameSpaceClause = '';
  69         }
  70
  71         # Watchlist editing
  72         $action = $wgRequest->getVal( 'action' );
  73         $remove = $wgRequest->getVal( 'remove' );
  74         $id = $wgRequest->getArray( 'id' );
  75
  76         $uid = $wgUser->getID();
  77         if( $wgEnotifWatchlist && $wgRequest->getVal( 'reset' ) && $wgRequest->wasPosted() ) {
  78                 $wgUser->clearAllNotifications( $uid );
  79         }
  80
  81   # Deleting items from watchlist
  82         if(($action == 'submit') && isset($remove) && is_array($id)) {
  83                 $wgOut->addWikiText( wfMsg( 'removingchecked' ) );
  84                 $wgOut->addHTML( '<p>' );
  85                 foreach($id as $one) {
  86                         $t = Title::newFromURL( $one );
  87                         if( !is_null( $t ) ) {
  88                                 $wl = WatchedItem::fromUserTitle( $wgUser, $t );
  89                                 if( $wl->removeWatch() === false ) {
  90                                         $wgOut->addHTML( "<br />\n" . wfMsg( 'couldntremove', htmlspecialchars($one) ) );
  91                                 } else {
  92                                         wfRunHooks('UnwatchArticle', array(&$wgUser, new Article($t)));
  93                                         $wgOut->addHTML( ' (' . htmlspecialchars($one) . ')' );
  94                                 }
  95                         } else {
  96                                 $wgOut->addHTML( "<br />\n" . wfMsg( 'iteminvalidname', htmlspecialchars($one) ) );
  97                         }
  98                 }
  99                 $wgOut->addHTML( "<br />\n" . wfMsg( 'wldone' ) . "</p>\n" );
 100         }
 101
 102         if ( $wgUseWatchlistCache ) {
 103                 $memckey = "$wgDBname:watchlist:id:" . $wgUser->getId();
 104                 $cache_s = @$wgMemc->get( $memckey );
 105                 if( $cache_s ){
 106                         $wgOut->addWikiText( wfMsg('wlsaved') );
 107                         $wgOut->addHTML( $cache_s );
 108                         return;
 109                 }
 110         }
 111
 112         $dbr =& wfGetDB( DB_SLAVE );
 113         extract( $dbr->tableNames( 'page', 'revision', 'watchlist', 'recentchanges' ) );
 114
 115         $sql = "SELECT COUNT(*) AS n FROM $watchlist WHERE wl_user=$uid";
 116         $res = $dbr->query( $sql, $fname );
 117         $s = $dbr->fetchObject( $res );
 118
 119 #       Patch *** A1 *** (see A2 below)
 120 #       adjust for page X, talk:page X, which are both stored separately, but treated together
 121         $nitems = floor($s->n / 2);
 122 #       $nitems = $s->n;
 123
 124         if($nitems == 0) {
 125                 $wgOut->addWikiText( wfMsg( 'nowatchlist' ) );
 126                 return;
 127         }
 128
 129         if( is_null($days) || !is_numeric($days) ) {
 130                 $big = 1000; /* The magical big */
 131                 if($nitems > $big) {
 132                         # Set default cutoff shorter
 133                         $days = $defaults['days'] = (12.0 / 24.0); # 12 hours...
 134                 } else {
 135                         $days = $defaults['days']; # default cutoff for shortlisters
 136                 }
 137         } else {
 138                 $days = floatval($days);
 139         }
 140
 141         // Dump everything here
 142         $nondefaults = array();
 143
 144         wfAppendToArrayIfNotDefault( 'days', $days, $defaults, $nondefaults);
 145         wfAppendToArrayIfNotDefault( 'hideOwn', (int)$hideOwn, $defaults, $nondefaults);
 146         wfAppendToArrayIfNotDefault( 'hideBots', (int)$hideBots, $defaults, $nondefaults);
 147         wfAppendToArrayIfNotDefault( 'namespace', $nameSpace, $defaults, $nondefaults );
 148
 149         if ( $days <= 0 ) {
 150                 $docutoff = '';
 151                 $cutoff = false;
 152                 $npages = wfMsg( 'watchlistall1' );
 153         } else {
 154                 $docutoff = "AND rev_timestamp > '" .
 155                   ( $cutoff = $dbr->timestamp( time() - intval( $days * 86400 ) ) )
 156                   . "'";
 157                   /*
 158                   $sql = "SELECT COUNT(*) AS n FROM $page, $revision  WHERE rev_timestamp>'$cutoff' AND page_id=rev_page";
 159                   $res = $dbr->query( $sql, $fname );
 160                   $s = $dbr->fetchObject( $res );
 161                   $npages = $s->n;
 162                   */
 163                   $npages = 40000 * $days;
 164
 165         }
 166
 167         /* Edit watchlist form */
 168         if($wgRequest->getBool('edit') || $par == 'edit' ) {
 169                 $wgOut->addWikiText( wfMsg( 'watchlistcontains', $wgLang->formatNum( $nitems ) ) .
 170                         "\n\n" . wfMsg( 'watcheditlist' ) );
 171
 172                 $wgOut->addHTML( '<form action=\'' .
 173                         $specialTitle->escapeLocalUrl( 'action=submit' ) .
 174                         "' method='post'>\n" );
 175
 176 #               Patch A2
 177 #               The following was proposed by KTurner 07.11.2004 to T.Gries
 178 #               $sql = "SELECT distinct (wl_namespace & ~1),wl_title FROM $watchlist WHERE wl_user=$uid";
 179                 $sql = "SELECT wl_namespace, wl_title, page_is_redirect FROM $watchlist LEFT JOIN $page ON wl_namespace = page_namespace AND wl_title = page_title WHERE wl_user=$uid";
 180
 181                 $res = $dbr->query( $sql, $fname );
 182
 183                 # Batch existence check
 184                 $linkBatch = new LinkBatch();
 185                 while( $row = $dbr->fetchObject( $res ) )
 186                         $linkBatch->addObj( Title::makeTitleSafe( $row->wl_namespace, $row->wl_title ) );
 187                 $linkBatch->execute();
 188                 if( $dbr->numRows( $res ) > 0 )
 189                         $dbr->dataSeek( $res, 0 ); # Let's do the time warp again!
 190
 191                 $sk = $wgUser->getSkin();
 192
 193                 $list = array();
 194                 while( $s = $dbr->fetchObject( $res ) ) {
 195                         $list[$s->wl_namespace][$s->wl_title] = $s->page_is_redirect;
 196                 }
 197
 198                 // TODO: Display a TOC
 199                 foreach($list as $ns => $titles) {
 200                         if (Namespace::isTalk($ns))
 201                                 continue;
 202                         if ($ns != NS_MAIN)
 203                                 $wgOut->addHTML( '<h2>' . $wgContLang->getFormattedNsText( $ns ) . '</h2>' );
 204                         $wgOut->addHTML( '<ul>' );
 205                         foreach( $titles as $title => $redir ) {
 206                                 $titleObj = Title::makeTitle( $ns, $title );
 207                                 if( is_null( $titleObj ) ) {
 208                                         $wgOut->addHTML(
 209                                                 '<!-- bad title "' .
 210                                                 htmlspecialchars( $s->wl_title ) . '" in namespace ' . $s->wl_namespace . " -->\n"
 211                                         );
 212                                 } else {
 213                                         global $wgContLang;
 214                                         $toolLinks = array();
 215                                         $titleText = $titleObj->getPrefixedText();
 216                                         $pageLink = $sk->makeLinkObj( $titleObj );
 217                                         $toolLinks[] = $sk->makeLinkObj( $titleObj->getTalkPage(), $wgLang->getNsText( NS_TALK ) );
 218                                         if( $titleObj->exists() )
 219                                                 $toolLinks[] = $sk->makeKnownLinkObj( $titleObj, wfMsgHtml( 'history_short' ), 'action=history' );
 220                                         $toolLinks = '(' . implode( ' | ', $toolLinks ) . ')';
 221                                         $checkbox = '<input type="checkbox" name="id[]" value="' . htmlspecialchars( $titleObj->getPrefixedText() ) . '" /> ' . ( $wgContLang->isRTL() ? '&rlm;' : '&lrm;' );
 222                                         if( $redir ) {
 223                                                 $spanopen = '<span class="watchlistredir">';
 224                                                 $spanclosed = '</span>';
 225                                         } else {
 226                                                 $spanopen = $spanclosed = '';
 227                                         }
 228
 229                                         $wgOut->addHTML( "<li>{$checkbox}{$spanopen}{$pageLink}{$spanclosed} {$toolLinks}</li>\n" );
 230                                 }
 231                         }
 232                         $wgOut->addHTML( '</ul>' );
 233                 }
 234                 $wgOut->addHTML(
 235                         "<input type='submit' name='remove' value=\"" .
 236                         htmlspecialchars( wfMsg( "removechecked" ) ) . "\" />\n" .
 237                         "</form>\n"
 238                 );
 239
 240                 return;
 241         }
 242
 243         # If the watchlist is relatively short, it's simplest to zip
 244         # down its entirety and then sort the results.
 245
 246         # If it's relatively long, it may be worth our while to zip
 247         # through the time-sorted page list checking for watched items.
 248
 249         # Up estimate of watched items by 15% to compensate for talk pages...
 250
 251         # Toggles
 252         $andHideOwn = $hideOwn ? "AND (rc_user <> $uid)" : '';
 253         $andHideBots = $hideBots ? "AND (rc_bot = 0)" : '';
 254
 255         # Show watchlist header
 256         $header = '';
 257         if( $wgUser->getOption( 'enotifwatchlistpages' ) && $wgEnotifWatchlist) {
 258                 $header .= wfMsg( 'wlheader-enotif' ) . "\n";
 259         }
 260         if ( $wgEnotifWatchlist && $wgShowUpdatedMarker ) {
 261                 $header .= wfMsg( 'wlheader-showupdated' ) . "\n";
 262         }
 263
 264   # Toggle watchlist content (all recent edits or just the latest)
 265         if( $wgUser->getOption( 'extendwatchlist' )) {
 266                 $andLatest='';
 267                 $limitWatchlist = 'LIMIT ' . intval( $wgUser->getOption( 'wllimit' ) );
 268         } else {
 269                 $andLatest= 'AND rc_this_oldid=page_latest';
 270                 $limitWatchlist = '';
 271         }
 272
 273         # TODO: Consider removing the third parameter
 274         $header .= wfMsg( 'watchdetails', $wgLang->formatNum( $nitems ),
 275                 $wgLang->formatNum( $npages ), '',
 276                 $specialTitle->getFullUrl( 'edit=yes' ) );
 277         $wgOut->addWikiText( $header );
 278
 279         if ( $wgEnotifWatchlist && $wgShowUpdatedMarker ) {
 280                 $wgOut->addHTML( '<form action="' .
 281                         $specialTitle->escapeLocalUrl() .
 282                         '" method="post"><input type="submit" name="dummy" value="' .
 283                         htmlspecialchars( wfMsg( 'enotif_reset' ) ) .
 284                         '" /><input type="hidden" name="reset" value="all" /></form>' .
 285                         "\n\n" );
 286         }
 287
 288         $sql = "SELECT
 289           rc_namespace AS page_namespace, rc_title AS page_title,
 290           rc_comment AS rev_comment, rc_cur_id AS page_id,
 291           rc_user AS rev_user, rc_user_text AS rev_user_text,
 292           rc_timestamp AS rev_timestamp, rc_minor AS rev_minor_edit,
 293           rc_this_oldid AS rev_id,
 294           rc_last_oldid, rc_id, rc_patrolled,
 295           rc_new AS page_is_new,wl_notificationtimestamp
 296           FROM $watchlist,$recentchanges,$page
 297           WHERE wl_user=$uid
 298           AND wl_namespace=rc_namespace
 299           AND wl_title=rc_title
 300           AND rc_timestamp > '$cutoff'
 301           AND rc_cur_id=page_id
 302           $andLatest
 303           $andHideOwn
 304           $andHideBots
 305           $nameSpaceClause
 306           ORDER BY rc_timestamp DESC
 307           $limitWatchlist";
 308
 309         $res = $dbr->query( $sql, $fname );
 310         $numRows = $dbr->numRows( $res );
 311
 312         /* Start bottom header */
 313         $wgOut->addHTML( "<hr />\n<p>" );
 314
 315         if($days >= 1)
 316                 $wgOut->addWikiText( wfMsg( 'rcnote', $wgLang->formatNum( $numRows ),
 317                         $wgLang->formatNum( $days ), $wgLang->timeAndDate( wfTimestampNow(), true ) ) . '<br />' , false );
 318         elseif($days > 0)
 319                 $wgOut->addWikiText( wfMsg( 'wlnote', $wgLang->formatNum( $numRows ),
 320                         $wgLang->formatNum( round($days*24) ) ) . '<br />' , false );
 321
 322         $wgOut->addHTML( "\n" . wlCutoffLinks( $days, 'Watchlist', $nondefaults ) . "<br />\n" );
 323
 324         # Spit out some control panel links
 325         $thisTitle = Title::makeTitle( NS_SPECIAL, 'Watchlist' );
 326         $skin = $wgUser->getSkin();
 327         $linkElements = array( 'hideOwn' => 'wlhideshowown', 'hideBots' => 'wlhideshowbots' );
 328
 329         # Problems encountered using the fancier method
 330         $label = $hideBots ? wfMsgHtml( 'show' ) : wfMsgHtml( 'hide' );
 331         $linkBits = wfArrayToCGI( array( 'hideBots' => 1 - (int)$hideBots ), $nondefaults );
 332         $link = $skin->makeKnownLinkObj( $thisTitle, $label, $linkBits );
 333         $links[] = wfMsgHtml( 'wlhideshowbots', $link );
 334
 335         $label = $hideOwn ? wfMsgHtml( 'show' ) : wfMsgHtml( 'hide' );
 336         $linkBits = wfArrayToCGI( array( 'hideOwn' => 1 - (int)$hideOwn ), $nondefaults );
 337         $link = $skin->makeKnownLinkObj( $thisTitle, $label, $linkBits );
 338         $links[] = wfMsgHtml( 'wlhideshowown', $link );
 339
 340         $wgOut->addHTML( implode( ' | ', $links ) );
 341
 342         # Form for namespace filtering
 343         $thisAction = $thisTitle->escapeLocalUrl();
 344         $nsForm  = "<form method=\"post\" action=\"{$thisAction}\">\n";
 345         $nsForm .= "<label for=\"namespace\">" . wfMsgExt( 'namespace', array( 'parseinline') ) . "</label> ";
 346         $nsForm .= HTMLnamespaceselector( $nameSpace, '' ) . "\n";
 347         $nsForm .= ( $hideOwn ? "<input type=\"hidden\" name=\"hideown\" value=\"1\" />\n" : "" );
 348         $nsForm .= ( $hideBots ? "<input type=\"hidden\" name=\"hidebots\" value=\"1\" />\n" : "" );
 349         $nsForm .= "<input type=\"hidden\" name=\"days\" value=\"" . $days . "\" />\n";
 350         $nsForm .= "<input type=\"submit\" name=\"submit\" value=\"" . wfMsgExt( 'allpagessubmit', array( 'escape') ) . "\" />\n";
 351         $nsForm .= "</form>\n";
 352         $wgOut->addHTML( $nsForm );
 353
 354         if ( $numRows == 0 ) {
 355                 $wgOut->addWikitext( "<br />" . wfMsg( 'watchnochange' ), false );
 356                 $wgOut->addHTML( "</p>\n" );
 357                 return;
 358         }
 359
 360         $wgOut->addHTML( "</p>\n" );
 361         /* End bottom header */
 362
 363         $list = ChangesList::newFromUser( $wgUser );
 364
 365         $s = $list->beginRecentChangesList();
 366         $counter = 1;
 367         while ( $obj = $dbr->fetchObject( $res ) ) {
 368                 # Make fake RC entry
 369                 $rc = RecentChange::newFromCurRow( $obj, $obj->rc_last_oldid );
 370                 $rc->counter = $counter++;
 371
 372                 if ( $wgShowUpdatedMarker ) {
 373                         $updated = $obj->wl_notificationtimestamp;
 374                 } else {
 375                         // Same visual appearance as MW 1.4
 376                         $updated = true;
 377                 }
 378
 379                 if ($wgRCShowWatchingUsers && $wgUser->getOption( 'shownumberswatching' )) {
 380                         $sql3 = "SELECT COUNT(*) AS n FROM $watchlist WHERE wl_title='" .wfStrencode($obj->page_title). "' AND wl_namespace='{$obj->page_namespace}'" ;
 381                         $res3 = $dbr->query( $sql3, DB_READ, $fname );
 382                         $x = $dbr->fetchObject( $res3 );
 383                         $rc->numberofWatchingusers = $x->n;
 384                 } else {
 385                         $rc->numberofWatchingusers = 0;
 386                 }
 387
 388                 $s .= $list->recentChangesLine( $rc, $updated );
 389         }
 390         $s .= $list->endRecentChangesList();
 391
 392         $dbr->freeResult( $res );
 393         $wgOut->addHTML( $s );
 394
 395         if ( $wgUseWatchlistCache ) {
 396                 $wgMemc->set( $memckey, $s, $wgWLCacheTimeout);
 397         }
 398
 399 }
 400
 401 function wlHoursLink( $h, $page, $options = array() ) {
 402         global $wgUser, $wgLang, $wgContLang;
 403         $sk = $wgUser->getSkin();
 404         $s = $sk->makeKnownLink(
 405           $wgContLang->specialPage( $page ),
 406           $wgLang->formatNum( $h ),
 407           wfArrayToCGI( array('days' => ($h / 24.0)), $options ) );
 408         return $s;
 409 }
 410
 411 function wlDaysLink( $d, $page, $options = array() ) {
 412         global $wgUser, $wgLang, $wgContLang;
 413         $sk = $wgUser->getSkin();
 414         $s = $sk->makeKnownLink(
 415           $wgContLang->specialPage( $page ),
 416           ($d ? $wgLang->formatNum( $d ) : wfMsgHtml( 'watchlistall2' ) ),
 417           wfArrayToCGI( array('days' => $d), $options ) );
 418         return $s;
 419 }
 420
 421 /**
 422  * Returns html
 423  */
 424 function wlCutoffLinks( $days, $page = 'Watchlist', $options = array() ) {
 425         $hours = array( 1, 2, 6, 12 );
 426         $days = array( 1, 3, 7 );
 427         $cl = '';
 428         $i = 0;
 429         foreach( $hours as $h ) {
 430                 $hours[$i++] = wlHoursLink( $h, $page, $options );
 431         }
 432         $i = 0;
 433         foreach( $days as $d ) {
 434                 $days[$i++] = wlDaysLink( $d, $page, $options );
 435         }
 436         return wfMsgExt('wlshowlast',
 437                 array('parseinline', 'replaceafter'),
 438                 implode(' | ', $hours),
 439                 implode(' | ', $days),
 440                 wlDaysLink( 0, $page, $options ) );
 441 }
 442
 443 /**
 444  * Count the number of items on a user's watchlist
 445  *
 446  * @param $talk Include talk pages
 447  * @return integer
 448  */
 449 function wlCountItems( &$user, $talk = true ) {
 450         $dbr =& wfGetDB( DB_SLAVE );
 451
 452         # Fetch the raw count
 453         $res = $dbr->select( 'watchlist', 'COUNT(*) AS count', array( 'wl_user' => $user->mId ), 'wlCountItems' );
 454         $row = $dbr->fetchObject( $res );
 455         $count = $row->count;
 456         $dbr->freeResult( $res );
 457
 458         # Halve to remove talk pages if needed
 459         if( !$talk )
 460                 $count = floor( $count / 2 );
 461
 462         return( $count );
 463 }
 464
 465 /**
 466  * Allow the user to clear their watchlist
 467  *
 468  * @param $out Output object
 469  * @param $request Request object
 470  * @param $par Parameters passed to the watchlist page
 471  * @return bool True if it's been taken care of; false indicates the watchlist
 472  *                              code needs to do something further
 473  */
 474 function wlHandleClear( &$out, &$request, $par ) {
 475         # Check this function has something to do
 476         if( $request->getText( 'action' ) == 'clear' || $par == 'clear' ) {
 477                 global $wgUser;
 478                 $out->setPageTitle( wfMsgHtml( 'clearwatchlist' ) );
 479                 $count = wlCountItems( $wgUser );
 480                 if( $count > 0 ) {
 481                         # See if we're clearing or confirming
 482                         if( $request->wasPosted() && $wgUser->matchEditToken( $request->getText( 'token' ), 'clearwatchlist' ) ) {
 483                                 # Clearing, so do it and report the result
 484                                 $dbw =& wfGetDB( DB_MASTER );
 485                                 $dbw->delete( 'watchlist', array( 'wl_user' => $wgUser->mId ), 'wlHandleClear' );
 486                                 $out->addWikiText( wfMsg( 'watchlistcleardone', $count ) );
 487                                 $out->returnToMain();
 488                         } else {
 489                                 # Confirming, so show a form
 490                                 $wlTitle = Title::makeTitle( NS_SPECIAL, 'Watchlist' );
 491                                 $out->addHTML( wfElement( 'form', array( 'method' => 'post', 'action' => $wlTitle->getLocalUrl( 'action=clear' ) ), NULL ) );
 492                                 $out->addWikiText( wfMsg( 'watchlistcount', $count ) );
 493                                 $out->addWikiText( wfMsg( 'watchlistcleartext' ) );
 494                                 $out->addHTML( wfElement( 'input', array( 'type' => 'hidden', 'name' => 'token', 'value' => $wgUser->editToken( 'clearwatchlist' ) ), '' ) );
 495                                 $out->addHTML( wfElement( 'input', array( 'type' => 'submit', 'name' => 'submit', 'value' => wfMsgHtml( 'watchlistclearbutton' ) ), '' ) );
 496                                 $out->addHTML( wfCloseElement( 'form' ) );
 497                         }
 498                         return( true );
 499                 } else {
 500                         # Nothing on the watchlist; nothing to do here
 501                         $out->addWikiText( wfMsg( 'nowatchlist' ) );
 502                         $out->returnToMain();
 503                         return( true );
 504                 }
 505         } else {
 506                 return( false );
 507         }
 508 }
 509
 510 ?>