includes/SpecialWatchlist.php

   1 <?php
   2 /**
   3  *
   4  * @package MediaWiki
   5  * @subpackage SpecialPage
   6  */
   7
   8 /**
   9  *
  10  */
  11 require_once( 'SpecialRecentchanges.php' );
  12 require_once( 'WatchedItem.php' );
  13
  14 /**
  15  * Constructor
  16  * @todo Document $par parameter.
  17  * @param $par String: FIXME
  18  */
  19 function wfSpecialWatchlist( $par ) {
  20         global $wgUser, $wgOut, $wgLang, $wgMemc, $wgRequest, $wgContLang;
  21         global $wgUseWatchlistCache, $wgWLCacheTimeout, $wgDBname;
  22         global $wgRCShowWatchingUsers, $wgEnotifWatchlist, $wgShowUpdatedMarker;
  23         global $wgEnotifWatchlist;
  24         $fname = 'wfSpecialWatchlist';
  25
  26         $wgOut->setPagetitle( wfMsg( 'watchlist' ) );
  27         $sub = htmlspecialchars( wfMsg( 'watchlistsub', $wgUser->getName() ) );
  28         $wgOut->setSubtitle( $sub );
  29         $wgOut->setRobotpolicy( 'noindex,nofollow' );
  30
  31         $specialTitle = Title::makeTitle( NS_SPECIAL, 'Watchlist' );
  32
  33         if( $wgUser->isAnon() ) {
  34                 $wgOut->addWikiText( wfMsg( 'nowatchlist' ) );
  35                 return;
  36         }
  37
  38         if( wlHandleClear( $wgOut, $wgRequest, $par ) ) {
  39                 return;
  40         }
  41
  42         $defaults = array(
  43         /* float */ 'days' => floatval( $wgUser->getOption( 'watchlistdays' ) ), /* 3.0 or 0.5, watch further below */
  44         /* bool  */ 'hideOwn' => (int)$wgUser->getBoolOption( 'watchlisthideown' ),
  45         /* bool  */ 'hideBots' => (int)$wgUser->getBoolOption( 'watchlisthidebots' ),
  46         /* ?     */ 'namespace' => 'all',
  47         );
  48
  49         extract($defaults);
  50
  51         # Extract variables from the request, falling back to user preferences or
  52         # other default values if these don't exist
  53         $prefs['days'    ] = floatval( $wgUser->getOption( 'watchlistdays' ) );
  54         $prefs['hideown' ] = $wgUser->getBoolOption( 'watchlisthideown' );
  55         $prefs['hidebots'] = $wgUser->getBoolOption( 'watchlisthidebots' );
  56
  57         # Get query variables
  58         $days = $wgRequest->getVal( 'days', $prefs['days'] );
  59         $hideOwn = $wgRequest->getBool( 'hideOwn', $prefs['hideown'] );
  60         $hideBots = $wgRequest->getBool( 'hideBots', $prefs['hidebots'] );
  61
  62         # Get namespace value, if supplied, and prepare a WHERE fragment
  63         $nameSpace = $wgRequest->getIntOrNull( 'namespace' );
  64         if( !is_null( $nameSpace ) ) {
  65                 $nameSpace = intval( $nameSpace );
  66                 $nameSpaceClause = " AND rc_namespace = $nameSpace";
  67         } else {
  68                 $nameSpace = '';
  69                 $nameSpaceClause = '';
  70         }
  71
  72         # Watchlist editing
  73         $action = $wgRequest->getVal( 'action' );
  74         $remove = $wgRequest->getVal( 'remove' );
  75         $id = $wgRequest->getArray( 'id' );
  76
  77         $uid = $wgUser->getID();
  78         if( $wgEnotifWatchlist && $wgRequest->getVal( 'reset' ) && $wgRequest->wasPosted() ) {
  79                 $wgUser->clearAllNotifications( $uid );
  80         }
  81
  82   # Deleting items from watchlist
  83         if(($action == 'submit') && isset($remove) && is_array($id)) {
  84                 $wgOut->addWikiText( wfMsg( 'removingchecked' ) );
  85                 $wgOut->addHTML( '<p>' );
  86                 foreach($id as $one) {
  87                         $t = Title::newFromURL( $one );
  88                         if( !is_null( $t ) ) {
  89                                 $wl = WatchedItem::fromUserTitle( $wgUser, $t );
  90                                 if( $wl->removeWatch() === false ) {
  91                                         $wgOut->addHTML( "<br />\n" . wfMsg( 'couldntremove', htmlspecialchars($one) ) );
  92                                 } else {
  93                                         wfRunHooks('UnwatchArticle', array(&$wgUser, new Article($t)));
  94                                         $wgOut->addHTML( ' (' . htmlspecialchars($one) . ')' );
  95                                 }
  96                         } else {
  97                                 $wgOut->addHTML( "<br />\n" . wfMsg( 'iteminvalidname', htmlspecialchars($one) ) );
  98                         }
  99                 }
 100                 $wgOut->addHTML( "done.</p>\n" );
 101         }
 102
 103         if ( $wgUseWatchlistCache ) {
 104                 $memckey = "$wgDBname:watchlist:id:" . $wgUser->getId();
 105                 $cache_s = @$wgMemc->get( $memckey );
 106                 if( $cache_s ){
 107                         $wgOut->addWikiText( wfMsg('wlsaved') );
 108                         $wgOut->addHTML( $cache_s );
 109                         return;
 110                 }
 111         }
 112
 113         $dbr =& wfGetDB( DB_SLAVE );
 114         extract( $dbr->tableNames( 'page', 'revision', 'watchlist', 'recentchanges' ) );
 115
 116         $sql = "SELECT COUNT(*) AS n FROM $watchlist WHERE wl_user=$uid";
 117         $res = $dbr->query( $sql, $fname );
 118         $s = $dbr->fetchObject( $res );
 119
 120 #       Patch *** A1 *** (see A2 below)
 121 #       adjust for page X, talk:page X, which are both stored separately, but treated together
 122         $nitems = floor($s->n / 2);
 123 #       $nitems = $s->n;
 124
 125         if($nitems == 0) {
 126                 $wgOut->addWikiText( wfMsg( 'nowatchlist' ) );
 127                 return;
 128         }
 129
 130         if( is_null($days) || !is_numeric($days) ) {
 131                 $big = 1000; /* The magical big */
 132                 if($nitems > $big) {
 133                         # Set default cutoff shorter
 134                         $days = $defaults['days'] = (12.0 / 24.0); # 12 hours...
 135                 } else {
 136                         $days = $defaults['days']; # default cutoff for shortlisters
 137                 }
 138         } else {
 139                 $days = floatval($days);
 140         }
 141
 142         // Dump everything here
 143         $nondefaults = array();
 144
 145         wfAppendToArrayIfNotDefault( 'days', $days, $defaults, $nondefaults);
 146         wfAppendToArrayIfNotDefault( 'hideOwn', (int)$hideOwn, $defaults, $nondefaults);
 147         wfAppendToArrayIfNotDefault( 'hideBots', (int)$hideBots, $defaults, $nondefaults);
 148         wfAppendToArrayIfNotDefault( 'namespace', $nameSpace, $defaults, $nondefaults );
 149
 150         if ( $days <= 0 ) {
 151                 $docutoff = '';
 152                 $cutoff = false;
 153                 $npages = wfMsg( 'watchlistall1' );
 154         } else {
 155                 $docutoff = "AND rev_timestamp > '" .
 156                   ( $cutoff = $dbr->timestamp( time() - intval( $days * 86400 ) ) )
 157                   . "'";
 158                   /*
 159                   $sql = "SELECT COUNT(*) AS n FROM $page, $revision  WHERE rev_timestamp>'$cutoff' AND page_id=rev_page";
 160                   $res = $dbr->query( $sql, $fname );
 161                   $s = $dbr->fetchObject( $res );
 162                   $npages = $s->n;
 163                   */
 164                   $npages = 40000 * $days;
 165
 166         }
 167
 168         /* Edit watchlist form */
 169         if($wgRequest->getBool('edit') || $par == 'edit' ) {
 170                 $wgOut->addWikiText( wfMsg( 'watchlistcontains', $wgLang->formatNum( $nitems ) ) .
 171                         "\n\n" . wfMsg( 'watcheditlist' ) );
 172
 173                 $wgOut->addHTML( '<form action=\'' .
 174                         $specialTitle->escapeLocalUrl( 'action=submit' ) .
 175                         "' method='post'>\n" );
 176
 177 #               Patch A2
 178 #               The following was proposed by KTurner 07.11.2004 to T.Gries
 179 #               $sql = "SELECT distinct (wl_namespace & ~1),wl_title FROM $watchlist WHERE wl_user=$uid";
 180                 $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";
 181
 182                 $res = $dbr->query( $sql, $fname );
 183
 184                 # Batch existence check
 185                 $linkBatch = new LinkBatch();
 186                 while( $row = $dbr->fetchObject( $res ) )
 187                         $linkBatch->addObj( Title::makeTitleSafe( $row->wl_namespace, $row->wl_title ) );
 188                 $linkBatch->execute();
 189                 if( $dbr->numRows( $res ) > 0 )
 190                         $dbr->dataSeek( $res, 0 ); # Let's do the time warp again!
 191
 192                 $sk = $wgUser->getSkin();
 193
 194                 $list = array();
 195                 while( $s = $dbr->fetchObject( $res ) ) {
 196                         $list[$s->wl_namespace][$s->wl_title] = $s->page_is_redirect;
 197                 }
 198
 199                 // TODO: Display a TOC
 200                 foreach($list as $ns => $titles) {
 201                         if (Namespace::isTalk($ns))
 202                                 continue;
 203                         if ($ns != NS_MAIN)
 204                                 $wgOut->addHTML( '<h2>' . $wgContLang->getFormattedNsText( $ns ) . '</h2>' );
 205                         $wgOut->addHTML( '<ul>' );
 206                         foreach( $titles as $title => $redir ) {
 207                                 $titleObj = Title::makeTitle( $ns, $title );
 208                                 if( is_null( $titleObj ) ) {
 209                                         $wgOut->addHTML(
 210                                                 '<!-- bad title "' .
 211                                                 htmlspecialchars( $s->wl_title ) . '" in namespace ' . $s->wl_namespace . " -->\n"
 212                                         );
 213                                 } else {
 214                                         global $wgContLang;
 215                                         $toolLinks = array();
 216                                         $titleText = $titleObj->getPrefixedText();
 217                                         $pageLink = $sk->makeLinkObj( $titleObj );
 218                                         $toolLinks[] = $sk->makeLinkObj( $titleObj->getTalkPage(), $wgLang->getNsText( NS_TALK ) );
 219                                         if( $titleObj->exists() )
 220                                                 $toolLinks[] = $sk->makeKnownLinkObj( $titleObj, wfMsgHtml( 'history_short' ), 'action=history' );
 221                                         $toolLinks = '(' . implode( ' | ', $toolLinks ) . ')';
 222                                         $checkbox = '<input type="checkbox" name="id[]" value="' . htmlspecialchars( $titleObj->getPrefixedText() ) . '" /> ' . ( $wgContLang->isRTL() ? '&rlm;' : '&lrm;' );
 223                                         if( $redir ) {
 224                                                 $spanopen = '<span class="watchlistredir">';
 225                                                 $spanclosed = '</span>';
 226                                         } else {
 227                                                 $spanopen = $spanclosed = '';
 228                                         }
 229
 230                                         $wgOut->addHTML( "<li>{$checkbox}{$spanopen}{$pageLink}{$spanclosed} {$toolLinks}</li>\n" );
 231                                 }
 232                         }
 233                         $wgOut->addHTML( '</ul>' );
 234                 }
 235                 $wgOut->addHTML(
 236                         "<input type='submit' name='remove' value=\"" .
 237                         htmlspecialchars( wfMsg( "removechecked" ) ) . "\" />\n" .
 238                         "</form>\n"
 239                 );
 240
 241                 return;
 242         }
 243
 244         # If the watchlist is relatively short, it's simplest to zip
 245         # down its entirety and then sort the results.
 246
 247         # If it's relatively long, it may be worth our while to zip
 248         # through the time-sorted page list checking for watched items.
 249
 250         # Up estimate of watched items by 15% to compensate for talk pages...
 251
 252         # Toggles
 253         $andHideOwn = $hideOwn ? "AND (rc_user <> $uid)" : '';
 254         $andHideBots = $hideBots ? "AND (rc_bot = 0)" : '';
 255
 256         # Show watchlist header
 257         $header = '';
 258         if( $wgUser->getOption( 'enotifwatchlistpages' ) && $wgEnotifWatchlist) {
 259                 $header .= wfMsg( 'wlheader-enotif' ) . "\n";
 260         }
 261         if ( $wgEnotifWatchlist && $wgShowUpdatedMarker ) {
 262                 $header .= wfMsg( 'wlheader-showupdated' ) . "\n";
 263         }
 264
 265   # Toggle watchlist content (all recent edits or just the latest)
 266         if( $wgUser->getOption( 'extendwatchlist' )) {
 267                 $andLatest='';
 268                 $limitWatchlist = 'LIMIT ' . intval( $wgUser->getOption( 'wllimit' ) );
 269         } else {
 270                 $andLatest= 'AND rc_this_oldid=page_latest';
 271                 $limitWatchlist = '';
 272         }
 273
 274         # TODO: Consider removing the third parameter
 275         $header .= wfMsg( 'watchdetails', $wgLang->formatNum( $nitems ),
 276                 $wgLang->formatNum( $npages ), '',
 277                 $specialTitle->getFullUrl( 'edit=yes' ) );
 278         $wgOut->addWikiText( $header );
 279
 280         if ( $wgEnotifWatchlist && $wgShowUpdatedMarker ) {
 281                 $wgOut->addHTML( '<form action="' .
 282                         $specialTitle->escapeLocalUrl() .
 283                         '" method="post"><input type="submit" name="dummy" value="' .
 284                         htmlspecialchars( wfMsg( 'enotif_reset' ) ) .
 285                         '" /><input type="hidden" name="reset" value="all" /></form>' .
 286                         "\n\n" );
 287         }
 288
 289         $sql = "SELECT
 290           rc_namespace AS page_namespace, rc_title AS page_title,
 291           rc_comment AS rev_comment, rc_cur_id AS page_id,
 292           rc_user AS rev_user, rc_user_text AS rev_user_text,
 293           rc_timestamp AS rev_timestamp, rc_minor AS rev_minor_edit,
 294           rc_this_oldid AS rev_id,
 295           rc_last_oldid, rc_id, rc_patrolled,
 296           rc_new AS page_is_new,wl_notificationtimestamp
 297           FROM $watchlist,$recentchanges,$page
 298           WHERE wl_user=$uid
 299           AND wl_namespace=rc_namespace
 300           AND wl_title=rc_title
 301           AND rc_timestamp > '$cutoff'
 302           AND rc_cur_id=page_id
 303           $andLatest
 304           $andHideOwn
 305           $andHideBots
 306           $nameSpaceClause
 307           ORDER BY rc_timestamp DESC
 308           $limitWatchlist";
 309
 310         $res = $dbr->query( $sql, $fname );
 311         $numRows = $dbr->numRows( $res );
 312
 313         /* Start bottom header */
 314         $wgOut->addHTML( "<hr />\n<p>" );
 315
 316         if($days >= 1)
 317                 $wgOut->addWikiText( wfMsg( 'rcnote', $wgLang->formatNum( $numRows ),
 318                         $wgLang->formatNum( $days ), $wgLang->timeAndDate( wfTimestampNow(), true ) ) . '<br />' , false );
 319         elseif($days > 0)
 320                 $wgOut->addWikiText( wfMsg( 'wlnote', $wgLang->formatNum( $numRows ),
 321                         $wgLang->formatNum( round($days*24) ) ) . '<br />' , false );
 322
 323         $wgOut->addHTML( "\n" . wlCutoffLinks( $days, 'Watchlist', $nondefaults ) . "<br />\n" );
 324
 325         # Spit out some control panel links
 326         $thisTitle = Title::makeTitle( NS_SPECIAL, 'Watchlist' );
 327         $skin = $wgUser->getSkin();
 328         $linkElements = array( 'hideOwn' => 'wlhideshowown', 'hideBots' => 'wlhideshowbots' );
 329
 330         # Problems encountered using the fancier method
 331         $label = $hideBots ? wfMsgHtml( 'show' ) : wfMsgHtml( 'hide' );
 332         $linkBits = wfArrayToCGI( array( 'hideBots' => 1 - (int)$hideBots ), $nondefaults );
 333         $link = $skin->makeKnownLinkObj( $thisTitle, $label, $linkBits );
 334         $links[] = wfMsgHtml( 'wlhideshowbots', $link );
 335
 336         $label = $hideOwn ? wfMsgHtml( 'show' ) : wfMsgHtml( 'hide' );
 337         $linkBits = wfArrayToCGI( array( 'hideOwn' => 1 - (int)$hideOwn ), $nondefaults );
 338         $link = $skin->makeKnownLinkObj( $thisTitle, $label, $linkBits );
 339         $links[] = wfMsgHtml( 'wlhideshowown', $link );
 340
 341         $wgOut->addHTML( implode( ' | ', $links ) );
 342
 343         # Form for namespace filtering
 344         $thisAction = $thisTitle->escapeLocalUrl();
 345         $nsForm  = "<form method=\"post\" action=\"{$thisAction}\">\n";
 346         $nsForm .= "<label for=\"namespace\">" . wfMsgExt( 'namespace', array( 'parseinline') ) . "</label> ";
 347         $nsForm .= HTMLnamespaceselector( $nameSpace, '' ) . "\n";
 348         $nsForm .= ( $hideOwn ? "<input type=\"hidden\" name=\"hideown\" value=\"1\" />\n" : "" );
 349         $nsForm .= ( $hideBots ? "<input type=\"hidden\" name=\"hidebots\" value=\"1\" />\n" : "" );
 350         $nsForm .= "<input type=\"hidden\" name=\"days\" value=\"" . $days . "\" />\n";
 351         $nsForm .= "<input type=\"submit\" name=\"submit\" value=\"" . wfMsgExt( 'allpagessubmit', array( 'escape') ) . "\" />\n";
 352         $nsForm .= "</form>\n";
 353         $wgOut->addHTML( $nsForm );
 354
 355         if ( $numRows == 0 ) {
 356                 $wgOut->addWikitext( "<br />" . wfMsg( 'watchnochange' ), false );
 357                 $wgOut->addHTML( "</p>\n" );
 358                 return;
 359         }
 360
 361         $wgOut->addHTML( "</p>\n" );
 362         /* End bottom header */
 363
 364         $list = ChangesList::newFromUser( $wgUser );
 365
 366         $s = $list->beginRecentChangesList();
 367         $counter = 1;
 368         while ( $obj = $dbr->fetchObject( $res ) ) {
 369                 # Make fake RC entry
 370                 $rc = RecentChange::newFromCurRow( $obj, $obj->rc_last_oldid );
 371                 $rc->counter = $counter++;
 372
 373                 if ( $wgShowUpdatedMarker ) {
 374                         $updated = $obj->wl_notificationtimestamp;
 375                 } else {
 376                         // Same visual appearance as MW 1.4
 377                         $updated = true;
 378                 }
 379
 380                 if ($wgRCShowWatchingUsers && $wgUser->getOption( 'shownumberswatching' )) {
 381                         $sql3 = "SELECT COUNT(*) AS n FROM $watchlist WHERE wl_title='" .wfStrencode($obj->page_title). "' AND wl_namespace='{$obj->page_namespace}'" ;
 382                         $res3 = $dbr->query( $sql3, DB_READ, $fname );
 383                         $x = $dbr->fetchObject( $res3 );
 384                         $rc->numberofWatchingusers = $x->n;
 385                 } else {
 386                         $rc->numberofWatchingusers = 0;
 387                 }
 388
 389                 $s .= $list->recentChangesLine( $rc, $updated );
 390         }
 391         $s .= $list->endRecentChangesList();
 392
 393         $dbr->freeResult( $res );
 394         $wgOut->addHTML( $s );
 395
 396         if ( $wgUseWatchlistCache ) {
 397                 $wgMemc->set( $memckey, $s, $wgWLCacheTimeout);
 398         }
 399
 400 }
 401
 402 function wlHoursLink( $h, $page, $options = array() ) {
 403         global $wgUser, $wgLang, $wgContLang;
 404         $sk = $wgUser->getSkin();
 405         $s = $sk->makeKnownLink(
 406           $wgContLang->specialPage( $page ),
 407           $wgLang->formatNum( $h ),
 408           wfArrayToCGI( array('days' => ($h / 24.0)), $options ) );
 409         return $s;
 410 }
 411
 412 function wlDaysLink( $d, $page, $options = array() ) {
 413         global $wgUser, $wgLang, $wgContLang;
 414         $sk = $wgUser->getSkin();
 415         $s = $sk->makeKnownLink(
 416           $wgContLang->specialPage( $page ),
 417           ($d ? $wgLang->formatNum( $d ) : wfMsgHtml( 'watchlistall2' ) ),
 418           wfArrayToCGI( array('days' => $d), $options ) );
 419         return $s;
 420 }
 421
 422 /**
 423  * Returns html
 424  */
 425 function wlCutoffLinks( $days, $page = 'Watchlist', $options = array() ) {
 426         $hours = array( 1, 2, 6, 12 );
 427         $days = array( 1, 3, 7 );
 428         $cl = '';
 429         $i = 0;
 430         foreach( $hours as $h ) {
 431                 $hours[$i++] = wlHoursLink( $h, $page, $options );
 432         }
 433         $i = 0;
 434         foreach( $days as $d ) {
 435                 $days[$i++] = wlDaysLink( $d, $page, $options );
 436         }
 437         return wfMsgExt('wlshowlast',
 438                 array('parseinline', 'replaceafter'),
 439                 implode(' | ', $hours),
 440                 implode(' | ', $days),
 441                 wlDaysLink( 0, $page, $options ) );
 442 }
 443
 444 /**
 445  * Count the number of items on a user's watchlist
 446  *
 447  * @param $talk Include talk pages
 448  * @return integer
 449  */
 450 function wlCountItems( &$user, $talk = true ) {
 451         $dbr =& wfGetDB( DB_SLAVE );
 452
 453         # Fetch the raw count
 454         $res = $dbr->select( 'watchlist', 'COUNT(*) AS count', array( 'wl_user' => $user->mId ), 'wlCountItems' );
 455         $row = $dbr->fetchObject( $res );
 456         $count = $row->count;
 457         $dbr->freeResult( $res );
 458
 459         # Halve to remove talk pages if needed
 460         if( !$talk )
 461                 $count = floor( $count / 2 );
 462
 463         return( $count );
 464 }
 465
 466 /**
 467  * Allow the user to clear their watchlist
 468  *
 469  * @param $out Output object
 470  * @param $request Request object
 471  * @param $par Parameters passed to the watchlist page
 472  * @return bool True if it's been taken care of; false indicates the watchlist
 473  *                              code needs to do something further
 474  */
 475 function wlHandleClear( &$out, &$request, $par ) {
 476         # Check this function has something to do
 477         if( $request->getText( 'action' ) == 'clear' || $par == 'clear' ) {
 478                 global $wgUser;
 479                 $out->setPageTitle( wfMsgHtml( 'clearwatchlist' ) );
 480                 $count = wlCountItems( $wgUser );
 481                 if( $count > 0 ) {
 482                         # See if we're clearing or confirming
 483                         if( $request->wasPosted() && $wgUser->matchEditToken( $request->getText( 'token' ), 'clearwatchlist' ) ) {
 484                                 # Clearing, so do it and report the result
 485                                 $dbw =& wfGetDB( DB_MASTER );
 486                                 $dbw->delete( 'watchlist', array( 'wl_user' => $wgUser->mId ), 'wlHandleClear' );
 487                                 $out->addWikiText( wfMsg( 'watchlistcleardone', $count ) );
 488                                 $out->returnToMain();
 489                         } else {
 490                                 # Confirming, so show a form
 491                                 $wlTitle = Title::makeTitle( NS_SPECIAL, 'Watchlist' );
 492                                 $out->addHTML( wfElement( 'form', array( 'method' => 'post', 'action' => $wlTitle->getLocalUrl( 'action=clear' ) ), NULL ) );
 493                                 $out->addWikiText( wfMsg( 'watchlistcount', $count ) );
 494                                 $out->addWikiText( wfMsg( 'watchlistcleartext' ) );
 495                                 $out->addHTML( wfElement( 'input', array( 'type' => 'hidden', 'name' => 'token', 'value' => $wgUser->editToken( 'clearwatchlist' ) ), '' ) );
 496                                 $out->addHTML( wfElement( 'input', array( 'type' => 'submit', 'name' => 'submit', 'value' => wfMsgHtml( 'watchlistclearbutton' ) ), '' ) );
 497                                 $out->addHTML( wfCloseElement( 'form' ) );
 498                         }
 499                         return( true );
 500                 } else {
 501                         # Nothing on the watchlist; nothing to do here
 502                         $out->addWikiText( wfMsg( 'nowatchlist' ) );
 503                         $out->returnToMain();
 504                         return( true );
 505                 }
 506         } else {
 507                 return( false );
 508         }
 509 }
 510
 511 ?>