SpecialListgrants.php

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<?php
class SpecialListGrants extends SpecialPage {
    function __construct() {
        parent::__construct( 'Listgrants' );
    }
 
    public function execute( $par ) {
        $this->setHeaders();
        $this->outputHeader();
 
        $out = $this->getOutput();
        $out->addModuleStyles( 'mediawiki.special' );
 
        $out->addHTML(
            \Html::openElement( 'table',
                [ 'class' => 'wikitable mw-listgrouprights-table' ] ) .
                '<tr>' .
                \Html::element( 'th', null, $this->msg( 'listgrants-grant' )->text() ) .
                \Html::element( 'th', null, $this->msg( 'listgrants-rights' )->text() ) .
                '</tr>'
        );
 
        foreach ( $this->getConfig()->get( 'GrantPermissions' ) as $grant => $rights ) {
            $descs = [];
            $rights = array_filter( $rights ); // remove ones with 'false'
            foreach ( $rights as $permission => $granted ) {
                $descs[] = $this->msg(
                    'listgrouprights-right-display',
                    \User::getRightDescription( $permission ),
                    '<span class="mw-listgrants-right-name">' . $permission . '</span>'
                )->parse();
            }
            if ( !count( $descs ) ) {
                $grantCellHtml = '';
            } else {
                sort( $descs );
                $grantCellHtml = '<ul><li>' . implode( "</li>\n<li>", $descs ) . '</li></ul>';
            }
 
            $id = \Sanitizer::escapeId( $grant );
            $out->addHTML( \Html::rawElement( 'tr', [ 'id' => $id ],
                "<td>" . $this->msg( "grant-$grant" )->escaped() . "</td>" .
                "<td>" . $grantCellHtml . '</td>'
            ) );
        }
 
        $out->addHTML( \Html::closeElement( 'table' ) );
    }
 
    protected function getGroupName() {
        return 'users';
    }
}