SpecialPasswordPolicies.php

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<?php
class SpecialPasswordPolicies extends SpecialPage {
    public function __construct() {
        parent::__construct( 'PasswordPolicies' );
    }

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

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

        // TODO: Have specific user documentation page for this feature
        $this->addHelpLink( 'Manual:$wgPasswordPolicy' );

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

        $config = $this->getConfig();
        $policies = $config->get( 'PasswordPolicy' );

        $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 );

        $linkRenderer = $this->getLinkRenderer();

        foreach ( $allGroups as $group ) {
            if ( $group == '*' ) {
                continue;
            }

            $groupnameLocalized = UserGroupMembership::getGroupName( $group );

            $grouppageLocalizedTitle = UserGroupMembership::getGroupPage( $group )
                ?: Title::newFromText( MWNamespace::getCanonicalName( NS_PROJECT ) . ':' . $group );

            $grouppage = $linkRenderer->makeLink(
                $grouppageLocalizedTitle,
                $groupnameLocalized
            );

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

            $out->addHTML( Html::rawElement( 'tr', [ 'id' => Sanitizer::escapeIdForAttribute( $group ) ], "
                <td>$grouppage$grouplink</td>
                <td>" . $this->formatPolicies( $policies, $group ) . '</td>
                '
            ) );

        }

        $out->addHTML( Xml::closeElement( 'table' ) );
    }

    private function formatPolicies( $policies, $group ) {
        $groupPolicies = UserPasswordPolicy::getPoliciesForGroups(
            $policies['policies'],
            [ $group ],
            $policies['policies']['default']
        );

        $ret = [];
        foreach ( $groupPolicies as $gp => $val ) {
            if ( $val === false ) {
                // Policy isn't enabled, so no need to dislpay it
                continue;
            } elseif ( $val === true ) {
                $msg = $this->msg( 'passwordpolicies-policy-' . strtolower( $gp ) );
            } else {
                $msg = $this->msg( 'passwordpolicies-policy-' . strtolower( $gp ) )->numParams( $val );
            }
            $ret[] = $this->msg(
                'passwordpolicies-policy-display',
                $msg,
                '<span class="mw-passwordpolicies-policy-name">' . $gp . '</span>'
            )->parse();
        }
        if ( $ret === [] ) {
            return '';
        } else {
            return '<ul><li>' . implode( "</li>\n<li>", $ret ) . '</li></ul>';
        }
    }

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