SpecialListgrouprights.php

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<?php
class SpecialListGroupRights extends SpecialPage {
    function __construct() {
        parent::__construct( 'Listgrouprights' );
    }

    public function execute( $par ) {
        $this->setHeaders();
        $this->outputHeader();

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

        $out->wrapWikiMsg( "<div class=\"mw-listgrouprights-key\">\n$1\n</div>", 'listgrouprights-key' );

        $out->addHTML(
            Xml::openElement( 'table', [ 'class' => 'wikitable mw-listgrouprights-table' ] ) .
                '<tr>' .
                Xml::element( 'th', null, $this->msg( 'listgrouprights-group' )->text() ) .
                Xml::element( 'th', null, $this->msg( 'listgrouprights-rights' )->text() ) .
                '</tr>'
        );

        $config = $this->getConfig();
        $groupPermissions = $config->get( 'GroupPermissions' );
        $revokePermissions = $config->get( 'RevokePermissions' );
        $addGroups = $config->get( 'AddGroups' );
        $removeGroups = $config->get( 'RemoveGroups' );
        $groupsAddToSelf = $config->get( 'GroupsAddToSelf' );
        $groupsRemoveFromSelf = $config->get( 'GroupsRemoveFromSelf' );
        $allGroups = array_unique( array_merge(
            array_keys( $groupPermissions ),
            array_keys( $revokePermissions ),
            array_keys( $addGroups ),
            array_keys( $removeGroups ),
            array_keys( $groupsAddToSelf ),
            array_keys( $groupsRemoveFromSelf )
        ) );
        asort( $allGroups );

        foreach ( $allGroups as $group ) {
            $permissions = isset( $groupPermissions[$group] )
                ? $groupPermissions[$group]
                : [];
            $groupname = ( $group == '*' ) // Replace * with a more descriptive groupname
                ? 'all'
                : $group;

            $msg = $this->msg( 'group-' . $groupname );
            $groupnameLocalized = !$msg->isBlank() ? $msg->text() : $groupname;

            $msg = $this->msg( 'grouppage-' . $groupname )->inContentLanguage();
            $grouppageLocalized = !$msg->isBlank() ?
                $msg->text() :
                MWNamespace::getCanonicalName( NS_PROJECT ) . ':' . $groupname;
            $grouppageLocalizedTitle = Title::newFromText( $grouppageLocalized );

            if ( $group == '*' || !$grouppageLocalizedTitle ) {
                // Do not make a link for the generic * group or group with invalid group page
                $grouppage = htmlspecialchars( $groupnameLocalized );
            } else {
                $grouppage = Linker::link(
                    $grouppageLocalizedTitle,
                    htmlspecialchars( $groupnameLocalized )
                );
            }

            if ( $group === 'user' ) {
                // Link to Special:listusers for implicit group 'user'
                $grouplink = '<br />' . Linker::linkKnown(
                    SpecialPage::getTitleFor( 'Listusers' ),
                    $this->msg( 'listgrouprights-members' )->escaped()
                );
            } elseif ( !in_array( $group, $config->get( 'ImplicitGroups' ) ) ) {
                $grouplink = '<br />' . Linker::linkKnown(
                    SpecialPage::getTitleFor( 'Listusers' ),
                    $this->msg( 'listgrouprights-members' )->escaped(),
                    [],
                    [ 'group' => $group ]
                );
            } else {
                // No link to Special:listusers for other implicit groups as they are unlistable
                $grouplink = '';
            }

            $revoke = isset( $revokePermissions[$group] ) ? $revokePermissions[$group] : [];
            $addgroups = isset( $addGroups[$group] ) ? $addGroups[$group] : [];
            $removegroups = isset( $removeGroups[$group] ) ? $removeGroups[$group] : [];
            $addgroupsSelf = isset( $groupsAddToSelf[$group] ) ? $groupsAddToSelf[$group] : [];
            $removegroupsSelf = isset( $groupsRemoveFromSelf[$group] )
                ? $groupsRemoveFromSelf[$group]
                : [];

            $id = $group == '*' ? false : Sanitizer::escapeId( $group );
            $out->addHTML( Html::rawElement( 'tr', [ 'id' => $id ], "
                <td>$grouppage$grouplink</td>
                    <td>" .
                    $this->formatPermissions( $permissions, $revoke, $addgroups, $removegroups,
                        $addgroupsSelf, $removegroupsSelf ) .
                    '</td>
                '
            ) );
        }
        $out->addHTML( Xml::closeElement( 'table' ) );
        $this->outputNamespaceProtectionInfo();
    }

    private function outputNamespaceProtectionInfo() {
        global $wgParser, $wgContLang;
        $out = $this->getOutput();
        $namespaceProtection = $this->getConfig()->get( 'NamespaceProtection' );

        if ( count( $namespaceProtection ) == 0 ) {
            return;
        }

        $header = $this->msg( 'listgrouprights-namespaceprotection-header' )->parse();
        $out->addHTML(
            Html::rawElement( 'h2', [], Html::element( 'span', [
                'class' => 'mw-headline',
                'id' => $wgParser->guessSectionNameFromWikiText( $header )
            ], $header ) ) .
            Xml::openElement( 'table', [ 'class' => 'wikitable' ] ) .
            Html::element(
                'th',
                [],
                $this->msg( 'listgrouprights-namespaceprotection-namespace' )->text()
            ) .
            Html::element(
                'th',
                [],
                $this->msg( 'listgrouprights-namespaceprotection-restrictedto' )->text()
            )
        );

        ksort( $namespaceProtection );
        foreach ( $namespaceProtection as $namespace => $rights ) {
            if ( !in_array( $namespace, MWNamespace::getValidNamespaces() ) ) {
                continue;
            }

            if ( $namespace == NS_MAIN ) {
                $namespaceText = $this->msg( 'blanknamespace' )->text();
            } else {
                $namespaceText = $wgContLang->convertNamespace( $namespace );
            }

            $out->addHTML(
                Xml::openElement( 'tr' ) .
                Html::rawElement(
                    'td',
                    [],
                    Linker::link(
                        SpecialPage::getTitleFor( 'Allpages' ),
                        htmlspecialchars( $namespaceText ),
                        [],
                        [ 'namespace' => $namespace ]
                    )
                ) .
                Xml::openElement( 'td' ) . Xml::openElement( 'ul' )
            );

            if ( !is_array( $rights ) ) {
                $rights = [ $rights ];
            }

            foreach ( $rights as $right ) {
                $out->addHTML(
                    Html::rawElement( 'li', [], $this->msg(
                        'listgrouprights-right-display',
                        User::getRightDescription( $right ),
                        Html::element(
                            'span',
                            [ 'class' => 'mw-listgrouprights-right-name' ],
                            $right
                        )
                    )->parse() )
                );
            }

            $out->addHTML(
                Xml::closeElement( 'ul' ) .
                Xml::closeElement( 'td' ) .
                Xml::closeElement( 'tr' )
            );
        }
        $out->addHTML( Xml::closeElement( 'table' ) );
    }

    private function formatPermissions( $permissions, $revoke, $add, $remove, $addSelf, $removeSelf ) {
        $r = [];
        foreach ( $permissions as $permission => $granted ) {
            // show as granted only if it isn't revoked to prevent duplicate display of permissions
            if ( $granted && ( !isset( $revoke[$permission] ) || !$revoke[$permission] ) ) {
                $r[] = $this->msg( 'listgrouprights-right-display',
                    User::getRightDescription( $permission ),
                    '<span class="mw-listgrouprights-right-name">' . $permission . '</span>'
                )->parse();
            }
        }
        foreach ( $revoke as $permission => $revoked ) {
            if ( $revoked ) {
                $r[] = $this->msg( 'listgrouprights-right-revoked',
                    User::getRightDescription( $permission ),
                    '<span class="mw-listgrouprights-right-name">' . $permission . '</span>'
                )->parse();
            }
        }

        sort( $r );

        $lang = $this->getLanguage();
        $allGroups = User::getAllGroups();

        $changeGroups = [
            'addgroup' => $add,
            'removegroup' => $remove,
            'addgroup-self' => $addSelf,
            'removegroup-self' => $removeSelf
        ];

        foreach ( $changeGroups as $messageKey => $changeGroup ) {
            if ( $changeGroup === true ) {
                // For grep: listgrouprights-addgroup-all, listgrouprights-removegroup-all,
                // listgrouprights-addgroup-self-all, listgrouprights-removegroup-self-all
                $r[] = $this->msg( 'listgrouprights-' . $messageKey . '-all' )->escaped();
            } elseif ( is_array( $changeGroup ) ) {
                $changeGroup = array_intersect( array_values( array_unique( $changeGroup ) ), $allGroups );
                if ( count( $changeGroup ) ) {
                    // For grep: listgrouprights-addgroup, listgrouprights-removegroup,
                    // listgrouprights-addgroup-self, listgrouprights-removegroup-self
                    $r[] = $this->msg( 'listgrouprights-' . $messageKey,
                        $lang->listToText( array_map( [ 'User', 'makeGroupLinkWiki' ], $changeGroup ) ),
                        count( $changeGroup )
                    )->parse();
                }
            }
        }

        if ( empty( $r ) ) {
            return '';
        } else {
            return '<ul><li>' . implode( "</li>\n<li>", $r ) . '</li></ul>';
        }
    }

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