SpecialStatistics.php

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<?php
class SpecialStatistics extends SpecialPage {
    private $views, $edits, $good, $images, $total, $users,
        $activeUsers = 0;

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

    public function execute( $par ) {
        global $wgMemc, $wgDisableCounters, $wgMiserMode;

        $this->setHeaders();
        $this->getOutput()->addModuleStyles( 'mediawiki.special' );

        $this->views = SiteStats::views();
        $this->edits = SiteStats::edits();
        $this->good = SiteStats::articles();
        $this->images = SiteStats::images();
        $this->total = SiteStats::pages();
        $this->users = SiteStats::users();
        $this->activeUsers = SiteStats::activeUsers();
        $this->hook = '';

        # Staticic - views
        $viewsStats = '';
        if ( !$wgDisableCounters ) {
            $viewsStats = $this->getViewsStats();
        }

        # Set active user count
        if ( !$wgMiserMode ) {
            $key = wfMemcKey( 'sitestats', 'activeusers-updated' );
            // Re-calculate the count if the last tally is old...
            if ( !$wgMemc->get( $key ) ) {
                $dbw = wfGetDB( DB_MASTER );
                SiteStatsUpdate::cacheUpdate( $dbw );
                $wgMemc->set( $key, '1', 24 * 3600 ); // don't update for 1 day
            }
        }

        $text = Xml::openElement( 'table', array( 'class' => 'wikitable mw-statistics-table' ) );

        # Statistic - pages
        $text .= $this->getPageStats();

        # Statistic - edits
        $text .= $this->getEditStats();

        # Statistic - users
        $text .= $this->getUserStats();

        # Statistic - usergroups
        $text .= $this->getGroupStats();
        $text .= $viewsStats;

        # Statistic - popular pages
        if ( !$wgDisableCounters && !$wgMiserMode ) {
            $text .= $this->getMostViewedPages();
        }

        # Statistic - other
        $extraStats = array();
        if ( wfRunHooks( 'SpecialStatsAddExtra', array( &$extraStats ) ) ) {
            $text .= $this->getOtherStats( $extraStats );
        }

        $text .= Xml::closeElement( 'table' );

        # Customizable footer
        $footer = $this->msg( 'statistics-footer' );
        if ( !$footer->isBlank() ) {
            $text .= "\n" . $footer->parse();
        }

        $this->getOutput()->addHTML( $text );
    }

    private function formatRow( $text, $number, $trExtraParams = array(),
        $descMsg = '', $descMsgParam = ''
    ) {
        if ( $descMsg ) {
            $msg = $this->msg( $descMsg, $descMsgParam );
            if ( $msg->exists() ) {
                $descriptionText = $this->msg( 'parentheses' )->rawParams( $msg->parse() )->escaped();
                $text .= "<br />" . Xml::element( 'small', array( 'class' => 'mw-statistic-desc' ),
                    " $descriptionText" );
            }
        }

        return Html::rawElement( 'tr', $trExtraParams,
            Html::rawElement( 'td', array(), $text ) .
            Html::rawElement( 'td', array( 'class' => 'mw-statistics-numbers' ), $number )
        );
    }

    private function getPageStats() {
        return Xml::openElement( 'tr' ) .
            Xml::tags( 'th', array( 'colspan' => '2' ), $this->msg( 'statistics-header-pages' )->parse() ) .
            Xml::closeElement( 'tr' ) .
                $this->formatRow( Linker::linkKnown( SpecialPage::getTitleFor( 'Allpages' ),
                    $this->msg( 'statistics-articles' )->parse() ),
                    $this->getLanguage()->formatNum( $this->good ),
                    array( 'class' => 'mw-statistics-articles' ) ) .
                $this->formatRow( $this->msg( 'statistics-pages' )->parse(),
                    $this->getLanguage()->formatNum( $this->total ),
                    array( 'class' => 'mw-statistics-pages' ),
                    'statistics-pages-desc' ) .
                $this->formatRow( Linker::linkKnown( SpecialPage::getTitleFor( 'Listfiles' ),
                    $this->msg( 'statistics-files' )->parse() ),
                    $this->getLanguage()->formatNum( $this->images ),
                    array( 'class' => 'mw-statistics-files' ) );
    }

    private function getEditStats() {
        return Xml::openElement( 'tr' ) .
            Xml::tags( 'th', array( 'colspan' => '2' ), $this->msg( 'statistics-header-edits' )->parse() ) .
            Xml::closeElement( 'tr' ) .
            $this->formatRow( $this->msg( 'statistics-edits' )->parse(),
                $this->getLanguage()->formatNum( $this->edits ),
                array( 'class' => 'mw-statistics-edits' )
            ) .
            $this->formatRow( $this->msg( 'statistics-edits-average' )->parse(),
                $this->getLanguage()
                    ->formatNum( sprintf( '%.2f', $this->total ? $this->edits / $this->total : 0 ) ),
                array( 'class' => 'mw-statistics-edits-average' )
            );
    }

    private function getUserStats() {
        global $wgActiveUserDays;

        return Xml::openElement( 'tr' ) .
            Xml::tags( 'th', array( 'colspan' => '2' ), $this->msg( 'statistics-header-users' )->parse() ) .
            Xml::closeElement( 'tr' ) .
            $this->formatRow( $this->msg( 'statistics-users' )->parse(),
                $this->getLanguage()->formatNum( $this->users ),
                array( 'class' => 'mw-statistics-users' )
            ) .
            $this->formatRow( $this->msg( 'statistics-users-active' )->parse() . ' ' .
                Linker::linkKnown(
                    SpecialPage::getTitleFor( 'Activeusers' ),
                    $this->msg( 'listgrouprights-members' )->escaped()
                ),
                $this->getLanguage()->formatNum( $this->activeUsers ),
                array( 'class' => 'mw-statistics-users-active' ),
                'statistics-users-active-desc',
                $this->getLanguage()->formatNum( $wgActiveUserDays )
            );
    }

    private function getGroupStats() {
        global $wgGroupPermissions, $wgImplicitGroups;
        $text = '';
        foreach ( $wgGroupPermissions as $group => $permissions ) {
            # Skip generic * and implicit groups
            if ( in_array( $group, $wgImplicitGroups ) || $group == '*' ) {
                continue;
            }
            $groupname = htmlspecialchars( $group );
            $msg = $this->msg( 'group-' . $groupname );
            if ( $msg->isBlank() ) {
                $groupnameLocalized = $groupname;
            } else {
                $groupnameLocalized = $msg->text();
            }
            $msg = $this->msg( 'grouppage-' . $groupname )->inContentLanguage();
            if ( $msg->isBlank() ) {
                $grouppageLocalized = MWNamespace::getCanonicalName( NS_PROJECT ) . ':' . $groupname;
            } else {
                $grouppageLocalized = $msg->text();
            }
            $linkTarget = Title::newFromText( $grouppageLocalized );
            $grouppage = Linker::link(
                $linkTarget,
                htmlspecialchars( $groupnameLocalized )
            );
            $grouplink = Linker::linkKnown(
                SpecialPage::getTitleFor( 'Listusers' ),
                $this->msg( 'listgrouprights-members' )->escaped(),
                array(),
                array( 'group' => $group )
            );
            # Add a class when a usergroup contains no members to allow hiding these rows
            $classZero = '';
            $countUsers = SiteStats::numberingroup( $groupname );
            if ( $countUsers == 0 ) {
                $classZero = ' statistics-group-zero';
            }
            $text .= $this->formatRow( $grouppage . ' ' . $grouplink,
                $this->getLanguage()->formatNum( $countUsers ),
                array( 'class' => 'statistics-group-' . Sanitizer::escapeClass( $group ) . $classZero ) );
        }

        return $text;
    }

    private function getViewsStats() {
        return Xml::openElement( 'tr' ) .
            Xml::tags( 'th', array( 'colspan' => '2' ), $this->msg( 'statistics-header-views' )->parse() ) .
            Xml::closeElement( 'tr' ) .
                $this->formatRow( $this->msg( 'statistics-views-total' )->parse(),
                    $this->getLanguage()->formatNum( $this->views ),
                        array( 'class' => 'mw-statistics-views-total' ), 'statistics-views-total-desc' ) .
                $this->formatRow( $this->msg( 'statistics-views-peredit' )->parse(),
                    $this->getLanguage()->formatNum( sprintf( '%.2f', $this->edits ?
                        $this->views / $this->edits : 0 ) ),
                        array( 'class' => 'mw-statistics-views-peredit' ) );
    }

    private function getMostViewedPages() {
        $text = '';
        $dbr = wfGetDB( DB_SLAVE );
        $res = $dbr->select(
            'page',
            array(
                'page_namespace',
                'page_title',
                'page_counter',
            ),
            array(
                'page_is_redirect' => 0,
                'page_counter > 0',
            ),
            __METHOD__,
            array(
                'ORDER BY' => 'page_counter DESC',
                'LIMIT' => 10,
            )
        );

        if ( $res->numRows() > 0 ) {
            $text .= Xml::openElement( 'tr' );
            $text .= Xml::tags(
                'th',
                array( 'colspan' => '2' ),
                $this->msg( 'statistics-mostpopular' )->parse()
            );
            $text .= Xml::closeElement( 'tr' );

            foreach ( $res as $row ) {
                $title = Title::makeTitleSafe( $row->page_namespace, $row->page_title );

                if ( $title instanceof Title ) {
                    $text .= $this->formatRow( Linker::link( $title ),
                        $this->getLanguage()->formatNum( $row->page_counter ) );
                }
            }
            $res->free();
        }

        return $text;
    }

    private function getOtherStats( array $stats ) {
        $return = '';

        foreach ( $stats as $header => $items ) {
            // Identify the structure used
            if ( is_array( $items ) ) {

                // Ignore headers that are recursively set as legacy header
                if ( $header !== 'statistics-header-hooks' ) {
                    $return .= $this->formatRowHeader( $header );
                }

                // Collect all items that belong to the same header
                foreach ( $items as $key => $value ) {
                    $name = $this->msg( $key )->parse();
                    $number = htmlspecialchars( $value );

                    $return .= $this->formatRow(
                        $name,
                        $this->getLanguage()->formatNum( $number ),
                        array( 'class' => 'mw-statistics-hook', 'id' => 'mw-' . $key )
                    );
                }
            } else {
                // Create the legacy header only once
                if ( $return === '' ) {
                    $return .= $this->formatRowHeader( 'statistics-header-hooks' );
                }

                // Recursively remap the legacy structure
                $return .= $this->getOtherStats( array( 'statistics-header-hooks' =>
                    array( $header => $items ) ) );
            }
        }

        return $return;
    }

    private function formatRowHeader( $header ) {
        return Xml::openElement( 'tr' ) .
            Xml::tags( 'th', array( 'colspan' => '2' ), $this->msg( $header )->parse() ) .
            Xml::closeElement( 'tr' );
    }

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