SpecialTrackingCategories.php

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<?php
class SpecialTrackingCategories extends SpecialPage {
    function __construct() {
        parent::__construct( 'TrackingCategories' );
    }
 
    function execute( $par ) {
        // Global array containing names of tracking categories
        global $wgTrackingCategories;
 
        $this->setHeaders();
        $this->outputHeader();
        $this->getOutput()->allowClickjacking();
        $this->getOutput()->addHTML(
            Html::openElement( 'table', array( 'class' => 'mw-datatable TablePager',
                'id' => 'mw-trackingcategories-table' ) ) . "\n" .
            "<thead><tr>
            <th>" .
                $this->msg( 'trackingcategories-msg' )->escaped() . "
            </th>
            <th>" .
                $this->msg( 'trackingcategories-name' )->escaped() .
            "</th>
            <th>" .
                $this->msg( 'trackingcategories-desc' )->escaped() . "
            </th>
            </tr></thead>"
        );
 
        foreach( $wgTrackingCategories as $catMsg ) {
            /*
             * Check if the tracking category varies by namespace
             * Otherwise only pages in the current namespace will be displayed
             * If it does vary, show pages considering all namespaces
             */
            $msgObj = $this->msg( $catMsg )->inContentLanguage();
            $allMsgs = array();
            $catDesc = $catMsg . '-desc';
            $catMsgTitle = Title::makeTitleSafe( NS_MEDIAWIKI, $catMsg );
            $catMsgTitleText = Linker::link(
                $catMsgTitle,
                htmlspecialchars( $catMsg )
            );
 
            if ( strpos( $msgObj->plain(), '{{NAMESPACE}}' ) !== false ) {
                $ns = MWNamespace::getValidNamespaces();
                foreach ( $ns as $namesp ) {
                    $tempTitle = Title::makeTitleSafe( $namesp, $catMsg );
                    $catName = $msgObj->title( $tempTitle )->text();
                    if ( !$msgObj->isDisabled() ) {
                        $catTitle = Title::makeTitleSafe( NS_CATEGORY, $catName );
                        $catTitleText = Linker::link(
                            $catTitle,
                            htmlspecialchars( $catName )
                        );
                        $allMsgs[] = $catTitleText;
                    }
                }
            } else {
                $catName = $msgObj->text();
                if ( !$msgObj->isDisabled() ) {
                    $catTitle = Title::makeTitleSafe( NS_CATEGORY, $catName );
                    $catTitleText = Linker::link(
                        $catTitle,
                        htmlspecialchars( $catName )
                    );
                    $classes = array();
                } else {
                    $catTitleText = $this->msg( 'trackingcategories-disabled' )->parse();
                }
                $allMsgs[] = $catTitleText;
            }
 
            /*
             * Show category description if it exists as a system message
             * as category-name-desc
             */
            $descMsg = $this->msg( $catDesc );
            if ( $descMsg->isBlank() ) {
                $descMsg = $this->msg( 'trackingcategories-nodesc' );
            }
 
            $this->getOutput()->addHTML(
                Html::openElement( 'tr' ) .
                Html::openElement( 'td', array( 'class' => 'mw-trackingcategories-name' ) ) .
                    $this->getLanguage()->commaList( array_unique( $allMsgs ) ) .
                Html::closeElement( 'td' ) .
                Html::openElement( 'td', array( 'class' => 'mw-trackingcategories-msg' ) ) .
                    $catMsgTitleText .
                Html::closeElement( 'td' ) .
                Html::openElement( 'td', array( 'class' => 'mw-trackingcategories-desc' ) ) .
                    $descMsg->parse() .
                Html::closeElement( 'td' ) .
                Html::closeElement( 'tr' )
            );
        }
        $this->getOutput()->addHTML( Html::closeElement( 'table' ) );
    }
 
    protected function getGroupName() {
        return 'pages';
    }
}