SpecialWatchlist.php

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<?php
class SpecialWatchlist extends SpecialPage {
        protected $customFilters;

        public function __construct( $page = 'Watchlist' ) {
                parent::__construct( $page );
        }

        function execute( $par ) {
                global $wgRCShowWatchingUsers, $wgEnotifWatchlist, $wgShowUpdatedMarker;

                $user = $this->getUser();
                $output = $this->getOutput();

                # Anons don't get a watchlist
                if( $user->isAnon() ) {
                        $output->setPageTitle( $this->msg( 'watchnologin' ) );
                        $output->setRobotPolicy( 'noindex,nofollow' );
                        $llink = Linker::linkKnown(
                                SpecialPage::getTitleFor( 'Userlogin' ),
                                $this->msg( 'loginreqlink' )->escaped(),
                                array(),
                                array( 'returnto' => $this->getTitle()->getPrefixedText() )
                        );
                        $output->addHTML( $this->msg( 'watchlistanontext' )->rawParams( $llink )->parse() );
                        return;
                }

                // Add feed links
                $wlToken = $user->getOption( 'watchlisttoken' );
                if ( !$wlToken ) {
                        $wlToken = MWCryptRand::generateHex( 40 );
                        $user->setOption( 'watchlisttoken', $wlToken );
                        $user->saveSettings();
                }

                $this->addFeedLinks( array( 'action' => 'feedwatchlist', 'allrev' => 'allrev',
                                                        'wlowner' => $user->getName(), 'wltoken' => $wlToken ) );

                $this->setHeaders();
                $this->outputHeader();

                $output->addSubtitle( $this->msg( 'watchlistfor2', $user->getName()
                        )->rawParams( SpecialEditWatchlist::buildTools( null ) ) );

                $request = $this->getRequest();

                $mode = SpecialEditWatchlist::getMode( $request, $par );
                if( $mode !== false ) {
                        # TODO: localise?
                        switch( $mode ) {
                                case SpecialEditWatchlist::EDIT_CLEAR:
                                        $mode = 'clear';
                                        break;
                                case SpecialEditWatchlist::EDIT_RAW:
                                        $mode = 'raw';
                                        break;
                                default:
                                        $mode = null;
                        }
                        $title = SpecialPage::getTitleFor( 'EditWatchlist', $mode );
                        $output->redirect( $title->getLocalUrl() );
                        return;
                }

                $dbr = wfGetDB( DB_SLAVE, 'watchlist' );

                $nitems = $this->countItems( $dbr );
                if ( $nitems == 0 ) {
                        $output->addWikiMsg( 'nowatchlist' );
                        return;
                }

                // @TODO: use FormOptions!
                $defaults = array(
                /* float */ 'days'      => floatval( $user->getOption( 'watchlistdays' ) ), /* 3.0 or 0.5, watch further below */
                /* bool  */ 'hideMinor' => (int)$user->getBoolOption( 'watchlisthideminor' ),
                /* bool  */ 'hideBots'  => (int)$user->getBoolOption( 'watchlisthidebots' ),
                /* bool  */ 'hideAnons' => (int)$user->getBoolOption( 'watchlisthideanons' ),
                /* bool  */ 'hideLiu'   => (int)$user->getBoolOption( 'watchlisthideliu' ),
                /* bool  */ 'hidePatrolled' => (int)$user->getBoolOption( 'watchlisthidepatrolled' ),
                /* bool  */ 'hideOwn'   => (int)$user->getBoolOption( 'watchlisthideown' ),
                /* bool  */ 'extended'   => (int)$user->getBoolOption( 'extendwatchlist' ),
                /* ?     */ 'namespace' => '', //means all
                /* ?     */ 'invert'    => false,
                /* bool  */ 'associated' => false,
                );
                $this->customFilters = array();
                wfRunHooks( 'SpecialWatchlistFilters', array( $this, &$this->customFilters ) );
                foreach( $this->customFilters as $key => $params ) {
                        $defaults[$key] = $params['default'];
                }

                # Extract variables from the request, falling back to user preferences or
                # other default values if these don't exist
                $values = array();
                $values['days'] = $request->getVal( 'days', $defaults['days'] );
                $values['hideMinor'] = (int)$request->getBool( 'hideMinor', $defaults['hideMinor'] );
                $values['hideBots'] = (int)$request->getBool( 'hideBots', $defaults['hideBots'] );
                $values['hideAnons'] = (int)$request->getBool( 'hideAnons', $defaults['hideAnons'] );
                $values['hideLiu'] = (int)$request->getBool( 'hideLiu', $defaults['hideLiu'] );
                $values['hideOwn'] = (int)$request->getBool( 'hideOwn', $defaults['hideOwn'] );
                $values['hidePatrolled'] = (int)$request->getBool( 'hidePatrolled', $defaults['hidePatrolled'] );
                $values['extended'] = (int)$request->getBool( 'extended', $defaults['extended'] );
                foreach( $this->customFilters as $key => $params ) {
                        $values[$key] = (int)$request->getBool( $key, $defaults[$key] );
                }

                # Get namespace value, if supplied, and prepare a WHERE fragment
                $nameSpace = $request->getIntOrNull( 'namespace' );
                $invert = $request->getBool( 'invert' );
                $associated = $request->getBool( 'associated' );
                if ( !is_null( $nameSpace ) ) {
                        $eq_op = $invert ? '!=' : '=';
                        $bool_op = $invert ? 'AND' : 'OR';
                        $nameSpace = intval( $nameSpace ); // paranioa
                        if ( !$associated ) {
                                $nameSpaceClause = "rc_namespace $eq_op $nameSpace";
                        } else {
                                $associatedNS = MWNamespace::getAssociated( $nameSpace );
                                $nameSpaceClause =
                                        "rc_namespace $eq_op $nameSpace " .
                                        $bool_op .
                                        " rc_namespace $eq_op $associatedNS";
                        }
                } else {
                        $nameSpace = '';
                        $nameSpaceClause = '';
                }
                $values['namespace'] = $nameSpace;
                $values['invert'] = $invert;
                $values['associated'] = $associated;

                if( is_null( $values['days'] ) || !is_numeric( $values['days'] ) ) {
                        $big = 1000; /* The magical big */
                        if( $nitems > $big ) {
                                # Set default cutoff shorter
                                $values['days'] = $defaults['days'] = (12.0 / 24.0); # 12 hours...
                        } else {
                                $values['days'] = $defaults['days']; # default cutoff for shortlisters
                        }
                } else {
                        $values['days'] = floatval( $values['days'] );
                }

                // Dump everything here
                $nondefaults = array();
                foreach ( $defaults as $name => $defValue ) {
                        wfAppendToArrayIfNotDefault( $name, $values[$name], $defaults, $nondefaults );
                }

                if( ( $wgEnotifWatchlist || $wgShowUpdatedMarker ) && $request->getVal( 'reset' ) &&
                        $request->wasPosted() )
                {
                        $user->clearAllNotifications();
                        $output->redirect( $this->getTitle()->getFullUrl( $nondefaults ) );
                        return;
                }

                # Possible where conditions
                $conds = array();

                if( $values['days'] > 0 ) {
                        $conds[] = 'rc_timestamp > ' . $dbr->addQuotes( $dbr->timestamp( time() - intval( $values['days'] * 86400 ) ) );
                }

                # If the watchlist is relatively short, it's simplest to zip
                # down its entirety and then sort the results.

                # If it's relatively long, it may be worth our while to zip
                # through the time-sorted page list checking for watched items.

                # Up estimate of watched items by 15% to compensate for talk pages...

                # Toggles
                if( $values['hideOwn'] ) {
                        $conds[] = 'rc_user != ' . $user->getId();
                }
                if( $values['hideBots'] ) {
                        $conds[] = 'rc_bot = 0';
                }
                if( $values['hideMinor'] ) {
                        $conds[] = 'rc_minor = 0';
                }
                if( $values['hideLiu'] ) {
                        $conds[] = 'rc_user = 0';
                }
                if( $values['hideAnons'] ) {
                        $conds[] = 'rc_user != 0';
                }
                if ( $user->useRCPatrol() && $values['hidePatrolled'] ) {
                        $conds[] = 'rc_patrolled != 1';
                }
                if ( $nameSpaceClause ) {
                        $conds[] = $nameSpaceClause;
                }

                # Toggle watchlist content (all recent edits or just the latest)
                if( $values['extended'] ) {
                        $limitWatchlist = $user->getIntOption( 'wllimit' );
                        $usePage = false;
                } else {
                        # Top log Ids for a page are not stored
                        $conds[] = 'rc_this_oldid=page_latest OR rc_type=' . RC_LOG;
                        $limitWatchlist = 0;
                        $usePage = true;
                }

                # Show a message about slave lag, if applicable
                $lag = wfGetLB()->safeGetLag( $dbr );
                if( $lag > 0 ) {
                        $output->showLagWarning( $lag );
                }

                # Create output form
                $form = Xml::fieldset( $this->msg( 'watchlist-options' )->text(), false, array( 'id' => 'mw-watchlist-options' ) );

                # Show watchlist header
                $form .= $this->msg( 'watchlist-details' )->numParams( $nitems )->parse() . "\n";

                if( $user->getOption( 'enotifwatchlistpages' ) && $wgEnotifWatchlist) {
                        $form .= $this->msg( 'wlheader-enotif' )->parseAsBlock() . "\n";
                }
                if( $wgShowUpdatedMarker ) {
                        $form .= Xml::openElement( 'form', array( 'method' => 'post',
                                                'action' => $this->getTitle()->getLocalUrl(),
                                                'id' => 'mw-watchlist-resetbutton' ) ) . "\n" .
                                        $this->msg( 'wlheader-showupdated' )->parse() .
                                        Xml::submitButton( $this->msg( 'enotif_reset' )->text(), array( 'name' => 'dummy' ) ) . "\n" .
                                        Html::hidden( 'reset', 'all' ) . "\n";
                                        foreach ( $nondefaults as $key => $value ) {
                                                $form .= Html::hidden( $key, $value ) . "\n";
                                        }
                                        $form .= Xml::closeElement( 'form' ) . "\n";
                }
                $form .= "<hr />\n";

                $tables = array( 'recentchanges', 'watchlist' );
                $fields = RecentChange::selectFields();
                $join_conds = array(
                        'watchlist' => array(
                                'INNER JOIN',
                                array(
                                        'wl_user' => $user->getId(),
                                        'wl_namespace=rc_namespace',
                                        'wl_title=rc_title'
                                ),
                        ),
                );
                $options = array( 'ORDER BY' => 'rc_timestamp DESC' );
                if( $wgShowUpdatedMarker ) {
                        $fields[] = 'wl_notificationtimestamp';
                }
                if( $limitWatchlist ) {
                        $options['LIMIT'] = $limitWatchlist;
                }

                $rollbacker = $user->isAllowed( 'rollback' );
                if ( $usePage || $rollbacker ) {
                        $tables[] = 'page';
                        $join_conds['page'] = array( 'LEFT JOIN', 'rc_cur_id=page_id' );
                        if ( $rollbacker ) {
                                $fields[] = 'page_latest';
                        }
                }
                
                // Log entries with DELETED_ACTION must not show up unless the user has
                // the necessary rights.
                if ( !$user->isAllowed( 'deletedhistory' ) ) {
                        $bitmask = LogPage::DELETED_ACTION;
                } elseif ( !$user->isAllowed( 'suppressrevision' ) ) {
                        $bitmask = LogPage::DELETED_ACTION | LogPage::DELETED_RESTRICTED;
                } else {
                        $bitmask = 0;
                }
                if ( $bitmask ) {
                        $conds[] = $dbr->makeList( array(
                                'rc_type != ' . RC_LOG,
                                $dbr->bitAnd( 'rc_deleted', $bitmask ) . " != $bitmask",
                        ), LIST_OR );
                }


                ChangeTags::modifyDisplayQuery( $tables, $fields, $conds, $join_conds, $options, '' );
                wfRunHooks( 'SpecialWatchlistQuery', array( &$conds, &$tables, &$join_conds, &$fields, $values ) );

                $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $options, $join_conds );
                $numRows = $res->numRows();

                /* Start bottom header */

                $lang = $this->getLanguage();
                $wlInfo = '';
                if( $values['days'] > 0 ) {
                        $timestamp = wfTimestampNow();
                        $wlInfo = $this->msg( 'wlnote' )->numParams( $numRows, round( $values['days'] * 24 ) )->params(
                                $lang->userDate( $timestamp, $user ), $lang->userTime( $timestamp, $user ) )->parse() . "<br />\n";
                }

                $cutofflinks = $this->cutoffLinks( $values['days'], $nondefaults ) . "<br />\n";

                # Spit out some control panel links
                $filters = array(
                        'hideMinor'     => 'rcshowhideminor',
                        'hideBots'              => 'rcshowhidebots',
                        'hideAnons'     => 'rcshowhideanons',
                        'hideLiu'               => 'rcshowhideliu',
                        'hideOwn'               => 'rcshowhidemine',
                        'hidePatrolled' => 'rcshowhidepatr'
                );
                foreach ( $this->customFilters as $key => $params ) {
                        $filters[$key] = $params['msg'];
                }
                // Disable some if needed
                if ( !$user->useNPPatrol() ) {
                        unset( $filters['hidePatrolled'] );
                }

                $links = array();
                foreach( $filters as $name => $msg ) {
                        $links[] = $this->showHideLink( $nondefaults, $msg, $name, $values[$name] );
                }

                $hiddenFields = $nondefaults;
                unset( $hiddenFields['namespace'] );
                unset( $hiddenFields['invert'] );
                unset( $hiddenFields['associated'] );

                # Namespace filter and put the whole form together.
                $form .= $wlInfo;
                $form .= $cutofflinks;
                $form .= $lang->pipeList( $links ) . "\n";
                $form .= Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getTitle()->getLocalUrl(), 'id' => 'mw-watchlist-form-namespaceselector' ) ) . "\n";
                $form .= "<hr />\n<p>";
                $form .= Html::namespaceSelector(
                        array(
                                'selected' => $nameSpace,
                                'all' => '',
                                'label' => $this->msg( 'namespace' )->text()
                        ), array(
                                'name'  => 'namespace',
                                'id'    => 'namespace',
                                'class' => 'namespaceselector',
                        )
                ) . '&#160;';
                $form .= Xml::checkLabel(
                        $this->msg( 'invert' )->text(),
                        'invert',
                        'nsinvert',
                        $invert,
                        array( 'title' => $this->msg( 'tooltip-invert' )->text() )
                ) . '&#160;';
                $form .= Xml::checkLabel(
                        $this->msg( 'namespace_association' )->text(),
                        'associated',
                        'associated',
                        $associated,
                        array( 'title' => $this->msg( 'tooltip-namespace_association' )->text() )
                ) . '&#160;';
                $form .= Xml::submitButton( $this->msg( 'allpagessubmit' )->text() ) . "</p>\n";
                foreach ( $hiddenFields as $key => $value ) {
                        $form .= Html::hidden( $key, $value ) . "\n";
                }
                $form .= Xml::closeElement( 'form' ) . "\n";
                $form .= Xml::closeElement( 'fieldset' ) . "\n";
                $output->addHTML( $form );

                # If there's nothing to show, stop here
                if( $numRows == 0 ) {
                        $output->addWikiMsg( 'watchnochange' );
                        return;
                }

                /* End bottom header */

                /* Do link batch query */
                $linkBatch = new LinkBatch;
                foreach ( $res as $row ) {
                        $userNameUnderscored = str_replace( ' ', '_', $row->rc_user_text );
                        if ( $row->rc_user != 0 ) {
                                $linkBatch->add( NS_USER, $userNameUnderscored );
                        }
                        $linkBatch->add( NS_USER_TALK, $userNameUnderscored );

                        $linkBatch->add( $row->rc_namespace, $row->rc_title );
                }
                $linkBatch->execute();
                $dbr->dataSeek( $res, 0 );

                $list = ChangesList::newFromContext( $this->getContext() );
                $list->setWatchlistDivs();

                $s = $list->beginRecentChangesList();
                $counter = 1;
                foreach ( $res as $obj ) {
                        # Make RC entry
                        $rc = RecentChange::newFromRow( $obj );
                        $rc->counter = $counter++;

                        if ( $wgShowUpdatedMarker ) {
                                $updated = $obj->wl_notificationtimestamp;
                        } else {
                                $updated = false;
                        }

                        if ( $wgRCShowWatchingUsers && $user->getOption( 'shownumberswatching' ) ) {
                                $rc->numberofWatchingusers = $dbr->selectField( 'watchlist',
                                        'COUNT(*)',
                                        array(
                                                'wl_namespace' => $obj->rc_namespace,
                                                'wl_title' => $obj->rc_title,
                                        ),
                                        __METHOD__ );
                        } else {
                                $rc->numberofWatchingusers = 0;
                        }

                        $changeLine = $list->recentChangesLine( $rc, $updated, $counter );
                        if ( $changeLine !== false ) {
                                $s .= $changeLine;
                        }
                }
                $s .= $list->endRecentChangesList();

                $output->addHTML( $s );
        }

        protected function showHideLink( $options, $message, $name, $value ) {
                $label = $this->msg( $value ? 'show' : 'hide' )->escaped();
                $options[$name] = 1 - (int) $value;

                return $this->msg( $message )->rawParams( Linker::linkKnown( $this->getTitle(), $label, array(), $options ) )->escaped();
        }

        protected function hoursLink( $h, $options = array() ) {
                $options['days'] = ( $h / 24.0 );

                return Linker::linkKnown(
                        $this->getTitle(),
                        $this->getLanguage()->formatNum( $h ),
                        array(),
                        $options
                );
        }

        protected function daysLink( $d, $options = array() ) {
                $options['days'] = $d;
                $message = ( $d ? $this->getLanguage()->formatNum( $d ) : $this->msg( 'watchlistall2' )->escaped() );

                return Linker::linkKnown(
                        $this->getTitle(),
                        $message,
                        array(),
                        $options
                );
        }

        protected function cutoffLinks( $days, $options = array() ) {
                $hours = array( 1, 2, 6, 12 );
                $days = array( 1, 3, 7 );
                $i = 0;
                foreach( $hours as $h ) {
                        $hours[$i++] = $this->hoursLink( $h, $options );
                }
                $i = 0;
                foreach( $days as $d ) {
                        $days[$i++] = $this->daysLink( $d, $options );
                }
                return $this->msg( 'wlshowlast' )->rawParams(
                        $this->getLanguage()->pipeList( $hours ),
                        $this->getLanguage()->pipeList( $days ),
                        $this->daysLink( 0, $options ) )->parse();
        }

        protected function countItems( $dbr ) {
                # Fetch the raw count
                $res = $dbr->select( 'watchlist', array( 'count' => 'COUNT(*)' ),
                        array( 'wl_user' => $this->getUser()->getId() ), __METHOD__ );
                $row = $dbr->fetchObject( $res );
                $count = $row->count;

                return floor( $count / 2 );
        }

        protected function getGroupName() {
                return 'changes';
        }
}