SpecialContributions.php

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<?php
class SpecialContributions extends SpecialPage {

        protected $opts;

        public function __construct() {
                parent::__construct( 'Contributions' );
        }

        public function execute( $par ) {
                $this->setHeaders();
                $this->outputHeader();
                $out = $this->getOutput();
                $out->addModuleStyles( 'mediawiki.special' );

                $this->opts = array();
                $request = $this->getRequest();

                if ( $par == 'newbies' ) {
                        $target = 'newbies';
                        $this->opts['contribs'] = 'newbie';
                } elseif ( $par !== null ) {
                        $target = $par;
                } else {
                        $target = $request->getVal( 'target' );
                }

                // check for radiobox
                if ( $request->getVal( 'contribs' ) == 'newbie' ) {
                        $target = 'newbies';
                        $this->opts['contribs'] = 'newbie';
                } else {
                        $this->opts['contribs'] = 'user';
                }

                $this->opts['deletedOnly'] = $request->getBool( 'deletedOnly' );

                if ( !strlen( $target ) ) {
                        $out->addHTML( $this->getForm() );
                        return;
                }

                $user = $this->getUser();

                $this->opts['limit'] = $request->getInt( 'limit', $user->getOption( 'rclimit' ) );
                $this->opts['target'] = $target;
                $this->opts['topOnly'] = $request->getBool( 'topOnly' );

                $nt = Title::makeTitleSafe( NS_USER, $target );
                if ( !$nt ) {
                        $out->addHTML( $this->getForm() );
                        return;
                }
                $userObj = User::newFromName( $nt->getText(), false );
                if ( !$userObj ) {
                        $out->addHTML( $this->getForm() );
                        return;
                }
                $id = $userObj->getID();

                if ( $this->opts['contribs'] != 'newbie' ) {
                        $target = $nt->getText();
                        $out->addSubtitle( $this->contributionsSub( $userObj ) );
                        $out->setHTMLTitle( $this->msg( 'pagetitle', $this->msg( 'contributions-title', $target )->plain() ) );
                        $this->getSkin()->setRelevantUser( $userObj );
                } else {
                        $out->addSubtitle( $this->msg( 'sp-contributions-newbies-sub' ) );
                        $out->setHTMLTitle( $this->msg( 'pagetitle', $this->msg( 'sp-contributions-newbies-title' )->plain() ) );
                }

                if ( ( $ns = $request->getVal( 'namespace', null ) ) !== null && $ns !== '' ) {
                        $this->opts['namespace'] = intval( $ns );
                } else {
                        $this->opts['namespace'] = '';
                }

                $this->opts['associated'] = $request->getBool( 'associated' );

                $this->opts['nsInvert'] = (bool) $request->getVal( 'nsInvert' );

                $this->opts['tagfilter'] = (string) $request->getVal( 'tagfilter' );

                // Allows reverts to have the bot flag in recent changes. It is just here to
                // be passed in the form at the top of the page
                if ( $user->isAllowed( 'markbotedits' ) && $request->getBool( 'bot' ) ) {
                        $this->opts['bot'] = '1';
                }

                $skip = $request->getText( 'offset' ) || $request->getText( 'dir' ) == 'prev';
                # Offset overrides year/month selection
                if ( $skip ) {
                        $this->opts['year'] = '';
                        $this->opts['month'] = '';
                } else {
                        $this->opts['year'] = $request->getIntOrNull( 'year' );
                        $this->opts['month'] = $request->getIntOrNull( 'month' );
                }

                $feedType = $request->getVal( 'feed' );
                if ( $feedType ) {
                        // Maintain some level of backwards compatability
                        // If people request feeds using the old parameters, redirect to API
                        $apiParams = array(
                                'action' => 'feedcontributions',
                                'feedformat' => $feedType,
                                'user' => $target,
                        );
                        if ( $this->opts['topOnly'] ) {
                                $apiParams['toponly'] = true;
                        }
                        if ( $this->opts['deletedOnly'] ) {
                                $apiParams['deletedonly'] = true;
                        }
                        if ( $this->opts['tagfilter'] !== '' ) {
                                $apiParams['tagfilter'] = $this->opts['tagfilter'];
                        }
                        if ( $this->opts['namespace'] !== '' ) {
                                $apiParams['namespace'] = $this->opts['namespace'];
                        }
                        if ( $this->opts['year'] !== null ) {
                                $apiParams['year'] = $this->opts['year'];
                        }
                        if ( $this->opts['month'] !== null ) {
                                $apiParams['month'] = $this->opts['month'];
                        }

                        $url = wfScript( 'api' ) . '?' . wfArrayToCGI( $apiParams );

                        $out->redirect( $url, '301' );
                        return;
                }

                // Add RSS/atom links
                $this->addFeedLinks( array( 'action' => 'feedcontributions', 'user' => $target ) );

                if ( wfRunHooks( 'SpecialContributionsBeforeMainOutput', array( $id ) ) ) {

                        $out->addHTML( $this->getForm() );

                        $pager = new ContribsPager( $this->getContext(), array(
                                'target' => $target,
                                'contribs' => $this->opts['contribs'],
                                'namespace' => $this->opts['namespace'],
                                'year' => $this->opts['year'],
                                'month' => $this->opts['month'],
                                'deletedOnly' => $this->opts['deletedOnly'],
                                'topOnly' => $this->opts['topOnly'],
                                'nsInvert' => $this->opts['nsInvert'],
                                'associated' => $this->opts['associated'],
                        ) );
                        if ( !$pager->getNumRows() ) {
                                $out->addWikiMsg( 'nocontribs', $target );
                        } else {
                                # Show a message about slave lag, if applicable
                                $lag = wfGetLB()->safeGetLag( $pager->getDatabase() );
                                if ( $lag > 0 )
                                        $out->showLagWarning( $lag );

                                $out->addHTML(
                                        '<p>' . $pager->getNavigationBar() . '</p>' .
                                        $pager->getBody() .
                                        '<p>' . $pager->getNavigationBar() . '</p>'
                                );
                        }
                        $out->preventClickjacking( $pager->getPreventClickjacking() );

                        # Show the appropriate "footer" message - WHOIS tools, etc.
                        if ( $this->opts['contribs'] != 'newbie' ) {
                                $message = 'sp-contributions-footer';
                                if ( IP::isIPAddress( $target ) ) {
                                        $message = 'sp-contributions-footer-anon';
                                } else {
                                        if ( $userObj->isAnon() ) {
                                                // No message for non-existing users
                                                return;
                                        }
                                }

                                if ( !$this->msg( $message, $target )->isDisabled() ) {
                                        $out->wrapWikiMsg(
                                                "<div class='mw-contributions-footer'>\n$1\n</div>",
                                                array( $message, $target ) );
                                }
                        }
                }
        }

        protected function contributionsSub( $userObj ) {
                if ( $userObj->isAnon() ) {
                        $user = htmlspecialchars( $userObj->getName() );
                } else {
                        $user = Linker::link( $userObj->getUserPage(), htmlspecialchars( $userObj->getName() ) );
                }
                $nt = $userObj->getUserPage();
                $talk = $userObj->getTalkPage();
                if ( $talk ) {
                        $tools = $this->getUserLinks( $nt, $talk, $userObj );
                        $links = $this->getLanguage()->pipeList( $tools );

                        // Show a note if the user is blocked and display the last block log entry.
                        if ( $userObj->isBlocked() ) {
                                $out = $this->getOutput(); // showLogExtract() wants first parameter by reference
                                LogEventsList::showLogExtract(
                                        $out,
                                        'block',
                                        $nt,
                                        '',
                                        array(
                                                'lim' => 1,
                                                'showIfEmpty' => false,
                                                'msgKey' => array(
                                                        $userObj->isAnon() ?
                                                                'sp-contributions-blocked-notice-anon' :
                                                                'sp-contributions-blocked-notice',
                                                        $userObj->getName() # Support GENDER in 'sp-contributions-blocked-notice'
                                                ),
                                                'offset' => '' # don't use WebRequest parameter offset
                                        )
                                );
                        }
                }

                // Old message 'contribsub' had one parameter, but that doesn't work for
                // languages that want to put the "for" bit right after $user but before
                // $links.  If 'contribsub' is around, use it for reverse compatibility,
                // otherwise use 'contribsub2'.
                $oldMsg = $this->msg( 'contribsub' );
                if ( $oldMsg->exists() ) {
                        return $oldMsg->rawParams( "$user ($links)" );
                } else {
                        return $this->msg( 'contribsub2' )->rawParams( $user, $links );
                }
        }

        public function getUserLinks( Title $userpage, Title $talkpage, User $target ) {

                $id = $target->getId();
                $username = $target->getName();

                $tools[] = Linker::link( $talkpage, $this->msg( 'sp-contributions-talk' )->escaped() );

                if ( ( $id !== null ) || ( $id === null && IP::isIPAddress( $username ) ) ) {
                        if ( $this->getUser()->isAllowed( 'block' ) ) { # Block / Change block / Unblock links
                                if ( $target->isBlocked() ) {
                                        $tools[] = Linker::linkKnown( # Change block link
                                                SpecialPage::getTitleFor( 'Block', $username ),
                                                $this->msg( 'change-blocklink' )->escaped()
                                        );
                                        $tools[] = Linker::linkKnown( # Unblock link
                                                SpecialPage::getTitleFor( 'Unblock', $username ),
                                                $this->msg( 'unblocklink' )->escaped()
                                        );
                                } else { # User is not blocked
                                        $tools[] = Linker::linkKnown( # Block link
                                                SpecialPage::getTitleFor( 'Block', $username ),
                                                $this->msg( 'blocklink' )->escaped()
                                        );
                                }
                        }
                        # Block log link
                        $tools[] = Linker::linkKnown(
                                SpecialPage::getTitleFor( 'Log', 'block' ),
                                $this->msg( 'sp-contributions-blocklog' )->escaped(),
                                array(),
                                array(
                                        'page' => $userpage->getPrefixedText()
                                )
                        );
                }
                # Uploads
                $tools[] = Linker::linkKnown(
                        SpecialPage::getTitleFor( 'Listfiles', $username ),
                        $this->msg( 'sp-contributions-uploads' )->escaped()
                );

                # Other logs link
                $tools[] = Linker::linkKnown(
                        SpecialPage::getTitleFor( 'Log', $username ),
                        $this->msg( 'sp-contributions-logs' )->escaped()
                );

                # Add link to deleted user contributions for priviledged users
                if ( $this->getUser()->isAllowed( 'deletedhistory' ) ) {
                        $tools[] = Linker::linkKnown(
                                SpecialPage::getTitleFor( 'DeletedContributions', $username ),
                                $this->msg( 'sp-contributions-deleted' )->escaped()
                        );
                }

                # Add a link to change user rights for privileged users
                $userrightsPage = new UserrightsPage();
                $userrightsPage->setContext( $this->getContext() );
                if ( $id !== null && $userrightsPage->userCanChangeRights( $target ) ) {
                        $tools[] = Linker::linkKnown(
                                SpecialPage::getTitleFor( 'Userrights', $username ),
                                $this->msg( 'sp-contributions-userrights' )->escaped()
                        );
                }

                wfRunHooks( 'ContributionsToolLinks', array( $id, $userpage, &$tools ) );
                return $tools;
        }

        protected function getForm() {
                global $wgScript;

                $this->opts['title'] = $this->getTitle()->getPrefixedText();
                if ( !isset( $this->opts['target'] ) ) {
                        $this->opts['target'] = '';
                } else {
                        $this->opts['target'] = str_replace( '_' , ' ' , $this->opts['target'] );
                }

                if ( !isset( $this->opts['namespace'] ) ) {
                        $this->opts['namespace'] = '';
                }

                if ( !isset( $this->opts['nsInvert'] ) ) {
                        $this->opts['nsInvert'] = '';
                }

                if ( !isset( $this->opts['associated'] ) ) {
                        $this->opts['associated'] = false;
                }

                if ( !isset( $this->opts['contribs'] ) ) {
                        $this->opts['contribs'] = 'user';
                }

                if ( !isset( $this->opts['year'] ) ) {
                        $this->opts['year'] = '';
                }

                if ( !isset( $this->opts['month'] ) ) {
                        $this->opts['month'] = '';
                }

                if ( $this->opts['contribs'] == 'newbie' ) {
                        $this->opts['target'] = '';
                }

                if ( !isset( $this->opts['tagfilter'] ) ) {
                        $this->opts['tagfilter'] = '';
                }

                if ( !isset( $this->opts['topOnly'] ) ) {
                        $this->opts['topOnly'] = false;
                }

                $form = Xml::openElement( 'form', array( 'method' => 'get', 'action' => $wgScript, 'class' => 'mw-contributions-form' ) );

                # Add hidden params for tracking except for parameters in $skipParameters
                $skipParameters = array( 'namespace', 'nsInvert', 'deletedOnly', 'target', 'contribs', 'year', 'month', 'topOnly', 'associated' );
                foreach ( $this->opts as $name => $value ) {
                        if ( in_array( $name, $skipParameters ) ) {
                                continue;
                        }
                        $form .= "\t" . Html::hidden( $name, $value ) . "\n";
                }

                $tagFilter = ChangeTags::buildTagFilterSelector( $this->opts['tagfilter'] );

                if ( $tagFilter ) {
                        $filterSelection =
                                Xml::tags( 'td', array( 'class' => 'mw-label' ), array_shift( $tagFilter ) ) .
                                Xml::tags( 'td', array( 'class' => 'mw-input' ), implode( '&#160', $tagFilter ) );
                } else {
                        $filterSelection = Xml::tags( 'td', array( 'colspan' => 2 ), '' );
                }

                $targetSelection = Xml::tags( 'td', array( 'colspan' => 2 ),
                        Xml::radioLabel(
                                $this->msg( 'sp-contributions-newbies' )->text(),
                                'contribs',
                                'newbie' ,
                                'newbie',
                                $this->opts['contribs'] == 'newbie',
                                array( 'class' => 'mw-input' )
                        ) . '<br />' .
                        Xml::radioLabel(
                                $this->msg( 'sp-contributions-username' )->text(),
                                'contribs',
                                'user',
                                'user',
                                $this->opts['contribs'] == 'user',
                                array( 'class' => 'mw-input' )
                        ) . ' ' .
                        Html::input(
                                'target',
                                $this->opts['target'],
                                'text',
                                array( 'size' => '20', 'required' => '', 'class' => 'mw-input' ) +
                                        ( $this->opts['target'] ? array() : array( 'autofocus' )
                                )
                        ) . ' '
                ) ;

                $namespaceSelection =
                        Xml::tags( 'td', array( 'class' => 'mw-label' ),
                                Xml::label(
                                        $this->msg( 'namespace' )->text(),
                                        'namespace',
                                        ''
                                )
                        ) .
                        Xml::tags( 'td', null,
                                Xml::namespaceSelector( $this->opts['namespace'], '' ) . '&#160;' .
                                Html::rawElement( 'span', array( 'style' => 'white-space: nowrap' ),
                                        Xml::checkLabel(
                                                $this->msg( 'invert' )->text(),
                                                'nsInvert',
                                                'nsInvert',
                                                $this->opts['nsInvert'],
                                                array( 'title' => $this->msg( 'tooltip-invert' )->text(), 'class' => 'mw-input' )
                                        ) . '&#160;'
                                ) .
                                Html::rawElement( 'span', array( 'style' => 'white-space: nowrap' ),
                                        Xml::checkLabel(
                                                $this->msg( 'namespace_association' )->text(),
                                                'associated',
                                                'associated',
                                                $this->opts['associated'],
                                                array( 'title' => $this->msg( 'tooltip-namespace_association' )->text(), 'class' => 'mw-input' )
                                        ) . '&#160;'
                                )
                        ) ;

                $extraOptions = Xml::tags( 'td', array( 'colspan' => 2 ),
                        Html::rawElement( 'span', array( 'style' => 'white-space: nowrap' ),
                                Xml::checkLabel(
                                        $this->msg( 'history-show-deleted' )->text(),
                                        'deletedOnly',
                                        'mw-show-deleted-only',
                                        $this->opts['deletedOnly'],
                                        array( 'class' => 'mw-input' )
                                )
                        ) .
                        Html::rawElement( 'span', array( 'style' => 'white-space: nowrap' ),
                                Xml::checkLabel(
                                        $this->msg( 'sp-contributions-toponly' )->text(),
                                        'topOnly',
                                        'mw-show-top-only',
                                        $this->opts['topOnly'],
                                        array( 'class' => 'mw-input' )
                                )
                        )
                ) ;

                $dateSelectionAndSubmit = Xml::tags( 'td', array( 'colspan' => 2 ),
                        Xml::dateMenu(
                                $this->opts['year'],
                                $this->opts['month']
                        ) . ' ' .
                        Xml::submitButton(
                                $this->msg( 'sp-contributions-submit' )->text(),
                                array( 'class' => 'mw-submit' )
                        )
                ) ;

                $form .=
                        Xml::fieldset( $this->msg( 'sp-contributions-search' )->text() ) .
                        Xml::openElement( 'table', array( 'class' => 'mw-contributions-table' ) ) .
                                Xml::openElement( 'tr' ) .
                                        $targetSelection .
                                Xml::closeElement( 'tr' ) .
                                Xml::openElement( 'tr' ) .
                                        $namespaceSelection .
                                Xml::closeElement( 'tr' ) .
                                Xml::openElement( 'tr' ) .
                                        $filterSelection .
                                Xml::closeElement( 'tr' ) .
                                Xml::openElement( 'tr' ) .
                                        $extraOptions .
                                Xml::closeElement( 'tr' ) .
                                Xml::openElement( 'tr' ) .
                                        $dateSelectionAndSubmit .
                                Xml::closeElement( 'tr' ) .
                        Xml::closeElement( 'table' );

                $explain = $this->msg( 'sp-contributions-explain' );
                if ( $explain->exists() ) {
                        $form .= "<p id='mw-sp-contributions-explain'>{$explain}</p>";
                }
                $form .= Xml::closeElement( 'fieldset' ) .
                        Xml::closeElement( 'form' );
                return $form;
        }
}

class ContribsPager extends ReverseChronologicalPager {
        public $mDefaultDirection = true;
        var $messages, $target;
        var $namespace = '', $mDb;
        var $preventClickjacking = false;

        function __construct( IContextSource $context, array $options ) {
                parent::__construct( $context );

                $msgs = array( 'uctop', 'diff', 'newarticle', 'rollbacklink', 'diff', 'hist', 'rev-delundel', 'pipe-separator' );

                foreach ( $msgs as $msg ) {
                        $this->messages[$msg] = $this->msg( $msg )->escaped();
                }

                $this->target = isset( $options['target'] ) ? $options['target'] : '';
                $this->contribs = isset( $options['contribs'] ) ? $options['contribs'] : 'users';
                $this->namespace = isset( $options['namespace'] ) ? $options['namespace'] : '';
                $this->tagFilter = isset( $options['tagfilter'] ) ? $options['tagfilter'] : false;
                $this->nsInvert = isset( $options['nsInvert'] ) ? $options['nsInvert'] : false;
                $this->associated = isset( $options['associated'] ) ? $options['associated'] : false;

                $this->deletedOnly = !empty( $options['deletedOnly'] );
                $this->topOnly = !empty( $options['topOnly'] );

                $year = isset( $options['year'] ) ? $options['year'] : false;
                $month = isset( $options['month'] ) ? $options['month'] : false;
                $this->getDateCond( $year, $month );

                $this->mDb = wfGetDB( DB_SLAVE, 'contributions' );
        }

        function getDefaultQuery() {
                $query = parent::getDefaultQuery();
                $query['target'] = $this->target;
                return $query;
        }

        function getQueryInfo() {
                list( $tables, $index, $userCond, $join_cond ) = $this->getUserCond();

                $user = $this->getUser();
                $conds = array_merge( $userCond, $this->getNamespaceCond() );

                // Paranoia: avoid brute force searches (bug 17342)
                if ( !$user->isAllowed( 'deletedhistory' ) ) {
                        $conds[] = $this->mDb->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0';
                } elseif ( !$user->isAllowed( 'suppressrevision' ) ) {
                        $conds[] = $this->mDb->bitAnd( 'rev_deleted', Revision::SUPPRESSED_USER ) .
                                ' != ' . Revision::SUPPRESSED_USER;
                }

                # Don't include orphaned revisions
                $join_cond['page'] = Revision::pageJoinCond();
                # Get the current user name for accounts
                $join_cond['user'] = Revision::userJoinCond();

                $queryInfo = array(
                        'tables'     => $tables,
                        'fields'     => array_merge(
                                Revision::selectFields(),
                                Revision::selectUserFields(),
                                array( 'page_namespace', 'page_title', 'page_is_new',
                                        'page_latest', 'page_is_redirect', 'page_len' )
                        ),
                        'conds'      => $conds,
                        'options'    => array( 'USE INDEX' => array( 'revision' => $index ) ),
                        'join_conds' => $join_cond
                );

                ChangeTags::modifyDisplayQuery(
                        $queryInfo['tables'],
                        $queryInfo['fields'],
                        $queryInfo['conds'],
                        $queryInfo['join_conds'],
                        $queryInfo['options'],
                        $this->tagFilter
                );

                wfRunHooks( 'ContribsPager::getQueryInfo', array( &$this, &$queryInfo ) );
                return $queryInfo;
        }

        function getUserCond() {
                $condition = array();
                $join_conds = array();
                $tables = array( 'revision', 'page', 'user' );
                if ( $this->contribs == 'newbie' ) {
                        $tables[] = 'user_groups';
                        $max = $this->mDb->selectField( 'user', 'max(user_id)', false, __METHOD__ );
                        $condition[] = 'rev_user >' . (int)( $max - $max / 100 );
                        $condition[] = 'ug_group IS NULL';
                        $index = 'user_timestamp';
                        # @todo FIXME: Other groups may have 'bot' rights
                        $join_conds['user_groups'] = array( 'LEFT JOIN', "ug_user = rev_user AND ug_group = 'bot'" );
                } else {
                        if ( IP::isIPAddress( $this->target ) ) {
                                $condition['rev_user_text'] = $this->target;
                                $index = 'usertext_timestamp';
                        } else {
                                $condition['rev_user'] = User::idFromName( $this->target );
                                $index = 'user_timestamp';
                        }
                }
                if ( $this->deletedOnly ) {
                        $condition[] = "rev_deleted != '0'";
                }
                if ( $this->topOnly ) {
                        $condition[] = "rev_id = page_latest";
                }
                return array( $tables, $index, $condition, $join_conds );
        }

        function getNamespaceCond() {
                if ( $this->namespace !== '' ) {
                        $selectedNS = $this->mDb->addQuotes( $this->namespace );
                        $eq_op = $this->nsInvert ? '!=' : '=';
                        $bool_op = $this->nsInvert ? 'AND' : 'OR';

                        if ( !$this->associated ) {
                                return array( "page_namespace $eq_op $selectedNS" );
                        } else {
                                $associatedNS = $this->mDb->addQuotes (
                                        MWNamespace::getAssociated( $this->namespace )
                                );
                                return array(
                                        "page_namespace $eq_op $selectedNS " .
                                        $bool_op .
                                        " page_namespace $eq_op $associatedNS"
                                );
                        }

                } else {
                        return array();
                }
        }

        function getIndexField() {
                return 'rev_timestamp';
        }

        function doBatchLookups() {
                $this->mResult->rewind();
                $revIds = array();
                foreach ( $this->mResult as $row ) {
                        if( $row->rev_parent_id ) {
                                $revIds[] = $row->rev_parent_id;
                        }
                }
                $this->mParentLens = $this->getParentLengths( $revIds );
                $this->mResult->rewind(); // reset

                # Do a link batch query
                $this->mResult->seek( 0 );
                $batch = new LinkBatch();
                # Give some pointers to make (last) links
                foreach ( $this->mResult as $row ) {
                        if ( $this->contribs === 'newbie' ) { // multiple users
                                $batch->add( NS_USER, $row->user_name );
                                $batch->add( NS_USER_TALK, $row->user_name );
                        }
                        $batch->add( $row->page_namespace, $row->page_title );
                }
                $batch->execute();
                $this->mResult->seek( 0 );
        }

        private function getParentLengths( array $revIds ) {
                $revLens = array();
                if ( !$revIds ) {
                        return $revLens; // empty
                }
                wfProfileIn( __METHOD__ );
                $res = $this->getDatabase()->select( 'revision',
                        array( 'rev_id', 'rev_len' ),
                        array( 'rev_id' => $revIds ),
                        __METHOD__ );
                foreach ( $res as $row ) {
                        $revLens[$row->rev_id] = $row->rev_len;
                }
                wfProfileOut( __METHOD__ );
                return $revLens;
        }

        function getStartBody() {
                return "<ul>\n";
        }

        function getEndBody() {
                return "</ul>\n";
        }

        function formatRow( $row ) {
                wfProfileIn( __METHOD__ );

                $rev = new Revision( $row );
                $classes = array();

                $page = Title::newFromRow( $row );
                $link = Linker::link(
                        $page,
                        htmlspecialchars( $page->getPrefixedText() ),
                        array(),
                        $page->isRedirect() ? array( 'redirect' => 'no' ) : array()
                );
                # Mark current revisions
                $topmarktext = '';
                if ( $row->rev_id == $row->page_latest ) {
                        $topmarktext .= '<span class="mw-uctop">' . $this->messages['uctop'] . '</span>';
                        # Add rollback link
                        if ( !$row->page_is_new && $page->quickUserCan( 'rollback' )
                                && $page->quickUserCan( 'edit' ) )
                        {
                                $this->preventClickjacking();
                                $topmarktext .= ' ' . Linker::generateRollback( $rev );
                        }
                }
                $user = $this->getUser();
                # Is there a visible previous revision?
                if ( $rev->userCan( Revision::DELETED_TEXT, $user ) && $rev->getParentId() !== 0 ) {
                        $difftext = Linker::linkKnown(
                                $page,
                                $this->messages['diff'],
                                array(),
                                array(
                                        'diff' => 'prev',
                                        'oldid' => $row->rev_id
                                )
                        );
                } else {
                        $difftext = $this->messages['diff'];
                }
                $histlink = Linker::linkKnown(
                        $page,
                        $this->messages['hist'],
                        array(),
                        array( 'action' => 'history' )
                );

                if ( $row->rev_parent_id === null ) {
                        // For some reason rev_parent_id isn't populated for this row.
                        // Its rumoured this is true on wikipedia for some revisions (bug 34922).
                        // Next best thing is to have the total number of bytes.
                        $chardiff = ' . . ' . Linker::formatRevisionSize( $row->rev_len ) . ' . . ';
                } else {
                        $parentLen = isset( $this->mParentLens[$row->rev_parent_id] ) ? $this->mParentLens[$row->rev_parent_id] : 0;
                        $chardiff = ' . . ' . ChangesList::showCharacterDifference(
                                        $parentLen, $row->rev_len ) . ' . . ';
                }

                $lang = $this->getLanguage();
                $comment = $lang->getDirMark() . Linker::revComment( $rev, false, true );
                $date = $lang->userTimeAndDate( $row->rev_timestamp, $user );
                if ( $rev->userCan( Revision::DELETED_TEXT, $user ) ) {
                        $d = Linker::linkKnown(
                                $page,
                                htmlspecialchars( $date ),
                                array(),
                                array( 'oldid' => intval( $row->rev_id ) )
                        );
                } else {
                        $d = htmlspecialchars( $date );
                }
                if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
                        $d = '<span class="history-deleted">' . $d . '</span>';
                }

                # Show user names for /newbies as there may be different users.
                # Note that we already excluded rows with hidden user names.
                if ( $this->contribs == 'newbie' ) {
                        $userlink = ' . . ' . Linker::userLink( $rev->getUser(), $rev->getUserText() );
                        $userlink .= ' ' . $this->msg( 'parentheses' )->rawParams(
                                Linker::userTalkLink( $rev->getUser(), $rev->getUserText() ) )->escaped() . ' ';
                } else {
                        $userlink = '';
                }

                if ( $rev->getParentId() === 0 ) {
                        $nflag = ChangesList::flag( 'newpage' );
                } else {
                        $nflag = '';
                }

                if ( $rev->isMinor() ) {
                        $mflag = ChangesList::flag( 'minor' );
                } else {
                        $mflag = '';
                }

                $del = Linker::getRevDeleteLink( $user, $rev, $page );
                if ( $del !== '' ) {
                        $del .= ' ';
                }

                $diffHistLinks = '(' . $difftext . $this->messages['pipe-separator'] . $histlink . ')';
                $ret = "{$del}{$d} {$diffHistLinks}{$chardiff}{$nflag}{$mflag} {$link}{$userlink} {$comment} {$topmarktext}";

                # Denote if username is redacted for this edit
                if ( $rev->isDeleted( Revision::DELETED_USER ) ) {
                        $ret .= " <strong>" . $this->msg( 'rev-deleted-user-contribs' )->escaped() . "</strong>";
                }

                # Tags, if any.
                list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow( $row->ts_tags, 'contributions' );
                $classes = array_merge( $classes, $newClasses );
                $ret .= " $tagSummary";

                // Let extensions add data
                wfRunHooks( 'ContributionsLineEnding', array( &$this, &$ret, $row ) );

                $classes = implode( ' ', $classes );
                $ret = "<li class=\"$classes\">$ret</li>\n";
                wfProfileOut( __METHOD__ );
                return $ret;
        }

        public function getDatabase() {
                return $this->mDb;
        }

        function getSqlComment() {
                if ( $this->namespace || $this->deletedOnly ) {
                        return 'contributions page filtered for namespace or RevisionDeleted edits'; // potentially slow, see CR r58153
                } else {
                        return 'contributions page unfiltered';
                }
        }

        protected function preventClickjacking() {
                $this->preventClickjacking = true;
        }

        public function getPreventClickjacking() {
                return $this->preventClickjacking;
        }
}