DefaultPreferencesFactory.php

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<?php
namespace MediaWiki\Preferences;
 
use HTMLForm;
use HTMLFormField;
use IContextSource;
use ILanguageConverter;
use Language;
use LanguageCode;
use LanguageConverter;
use MediaWiki\Auth\AuthManager;
use MediaWiki\Auth\PasswordAuthenticationRequest;
use MediaWiki\Config\Config;
use MediaWiki\Config\ServiceOptions;
use MediaWiki\HookContainer\HookContainer;
use MediaWiki\HookContainer\HookRunner;
use MediaWiki\Html\Html;
use MediaWiki\Languages\LanguageConverterFactory;
use MediaWiki\Languages\LanguageNameUtils;
use MediaWiki\Linker\LinkRenderer;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Output\OutputPage;
use MediaWiki\Permissions\PermissionManager;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Specials\SpecialWatchlist;
use MediaWiki\Status\Status;
use MediaWiki\Title\NamespaceInfo;
use MediaWiki\Title\Title;
use MediaWiki\User\Options\UserOptionsLookup;
use MediaWiki\User\Options\UserOptionsManager;
use MediaWiki\User\User;
use MediaWiki\User\UserGroupManager;
use MediaWiki\User\UserGroupMembership;
use MediaWiki\User\UserTimeCorrection;
use Message;
use MessageLocalizer;
use MWException;
use Parser;
use ParserFactory;
use ParserOptions;
use PreferencesFormOOUI;
use Psr\Log\LoggerAwareTrait;
use Psr\Log\NullLogger;
use SkinFactory;
use UnexpectedValueException;
use Xml;
 
class DefaultPreferencesFactory implements PreferencesFactory {
    use LoggerAwareTrait;
 
    protected $options;
 
    protected $contLang;
 
    protected $languageNameUtils;
 
    protected $authManager;
 
    protected $linkRenderer;
 
    protected $nsInfo;
 
    protected $permissionManager;
 
    private $languageConverter;
 
    private $hookRunner;
 
    protected $userOptionsManager;
 
    private $languageConverterFactory;
 
    private $parserFactory;
 
    private $skinFactory;
 
    private $userGroupManager;
 
    private $signatureValidatorFactory;
 
    private $config;
 
    public const CONSTRUCTOR_OPTIONS = [
        MainConfigNames::AllowRequiringEmailForResets,
        MainConfigNames::AllowUserCss,
        MainConfigNames::AllowUserCssPrefs,
        MainConfigNames::AllowUserJs,
        MainConfigNames::DefaultSkin,
        MainConfigNames::EmailAuthentication,
        MainConfigNames::EmailConfirmToEdit,
        MainConfigNames::EnableEmail,
        MainConfigNames::EnableUserEmail,
        MainConfigNames::EnableUserEmailMuteList,
        MainConfigNames::EnotifMinorEdits,
        MainConfigNames::EnotifRevealEditorAddress,
        MainConfigNames::EnotifUserTalk,
        MainConfigNames::EnotifWatchlist,
        MainConfigNames::ForceHTTPS,
        MainConfigNames::HiddenPrefs,
        MainConfigNames::ImageLimits,
        MainConfigNames::LanguageCode,
        MainConfigNames::LocalTZoffset,
        MainConfigNames::MaxSigChars,
        MainConfigNames::RCMaxAge,
        MainConfigNames::RCShowWatchingUsers,
        MainConfigNames::RCWatchCategoryMembership,
        MainConfigNames::SearchMatchRedirectPreference,
        MainConfigNames::SecureLogin,
        MainConfigNames::ScriptPath,
        MainConfigNames::SignatureValidation,
        MainConfigNames::ThumbLimits,
    ];
 
    public function __construct(
        ServiceOptions $options,
        Language $contLang,
        AuthManager $authManager,
        LinkRenderer $linkRenderer,
        NamespaceInfo $nsInfo,
        PermissionManager $permissionManager,
        ILanguageConverter $languageConverter,
        LanguageNameUtils $languageNameUtils,
        HookContainer $hookContainer,
        UserOptionsLookup $userOptionsLookup,
        LanguageConverterFactory $languageConverterFactory = null,
        ParserFactory $parserFactory = null,
        SkinFactory $skinFactory = null,
        UserGroupManager $userGroupManager = null,
        SignatureValidatorFactory $signatureValidatorFactory = null,
        Config $config = null
    ) {
        $options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS );
 
        $this->options = $options;
        $this->contLang = $contLang;
        $this->authManager = $authManager;
        $this->linkRenderer = $linkRenderer;
        $this->nsInfo = $nsInfo;
 
        // We don't use the PermissionManager anymore, but we need to be careful
        // removing the parameter since this class is extended by GlobalPreferencesFactory
        // in the GlobalPreferences extension, and that class uses it
        $this->permissionManager = $permissionManager;
 
        $this->logger = new NullLogger();
        $this->languageConverter = $languageConverter;
        $this->languageNameUtils = $languageNameUtils;
        $this->hookRunner = new HookRunner( $hookContainer );
 
        // Don't break GlobalPreferences, fall back to global state if missing services
        // or if passed a UserOptionsLookup that isn't UserOptionsManager
        $services = static function () {
            // BC hack. Use a closure so this can be unit-tested.
            return MediaWikiServices::getInstance();
        };
        $this->userOptionsManager = ( $userOptionsLookup instanceof UserOptionsManager )
            ? $userOptionsLookup
            : $services()->getUserOptionsManager();
        $this->languageConverterFactory = $languageConverterFactory ?? $services()->getLanguageConverterFactory();
 
        $this->parserFactory = $parserFactory ?? $services()->getParserFactory();
        $this->skinFactory = $skinFactory ?? $services()->getSkinFactory();
        $this->userGroupManager = $userGroupManager ?? $services()->getUserGroupManager();
        $this->signatureValidatorFactory = $signatureValidatorFactory
            ?? $services()->getSignatureValidatorFactory();
        $this->config = $config ?? $services()->getMainConfig();
    }
 
    public function getSaveBlacklist() {
        return [
            'realname',
            'emailaddress',
        ];
    }
 
    public function getFormDescriptor( User $user, IContextSource $context ) {
        $preferences = [];
 
        OutputPage::setupOOUI(
            strtolower( $context->getSkin()->getSkinName() ),
            $context->getLanguage()->getDir()
        );
 
        $this->profilePreferences( $user, $context, $preferences );
        $this->skinPreferences( $user, $context, $preferences );
        $this->datetimePreferences( $user, $context, $preferences );
        $this->filesPreferences( $context, $preferences );
        $this->renderingPreferences( $user, $context, $preferences );
        $this->editingPreferences( $user, $context, $preferences );
        $this->rcPreferences( $user, $context, $preferences );
        $this->watchlistPreferences( $user, $context, $preferences );
        $this->searchPreferences( $context, $preferences );
 
        $this->hookRunner->onGetPreferences( $user, $preferences );
 
        $this->loadPreferenceValues( $user, $context, $preferences );
        $this->logger->debug( "Created form descriptor for user '{$user->getName()}'" );
        return $preferences;
    }
 
    public static function simplifyFormDescriptor( array $descriptor ) {
        foreach ( $descriptor as $name => &$params ) {
            // Info fields are useless and can use complicated closure to provide
            // text, skip all of them.
            if ( ( isset( $params['type'] ) && $params['type'] === 'info' ) ||
                ( isset( $params['class'] ) && $params['class'] === \HTMLInfoField::class )
            ) {
                unset( $descriptor[$name] );
                continue;
            }
            // Message parsing is the heaviest load when constructing the field,
            // but we just want to validate data.
            foreach ( $params as $key => $value ) {
                switch ( $key ) {
                    // Special case, should be kept.
                    case 'options-message':
                        break;
                    // Special case, should be transferred.
                    case 'options-messages':
                        unset( $params[$key] );
                        $params['options'] = $value;
                        break;
                    default:
                        if ( preg_match( '/-messages?$/', $key ) ) {
                            // Unwanted.
                            unset( $params[$key] );
                        }
                }
            }
        }
        return $descriptor;
    }
 
    private function loadPreferenceValues( User $user, IContextSource $context, &$defaultPreferences ) {
        // Remove preferences that wikis don't want to use
        foreach ( $this->options->get( MainConfigNames::HiddenPrefs ) as $pref ) {
            unset( $defaultPreferences[$pref] );
        }
 
        // For validation.
        $simplified = self::simplifyFormDescriptor( $defaultPreferences );
        $form = new HTMLForm( $simplified, $context );
 
        $disable = !$user->isAllowed( 'editmyoptions' );
 
        $defaultOptions = $this->userOptionsManager->getDefaultOptions();
        $userOptions = $this->userOptionsManager->getOptions( $user );
        $this->applyFilters( $userOptions, $defaultPreferences, 'filterForForm' );
        // Add in defaults from the user
        foreach ( $simplified as $name => $_ ) {
            $info = &$defaultPreferences[$name];
            if ( $disable && !in_array( $name, $this->getSaveBlacklist() ) ) {
                $info['disabled'] = 'disabled';
            }
            if ( isset( $info['default'] ) ) {
                // Already set, no problem
                continue;
            }
            $field = $form->getField( $name );
            $globalDefault = $defaultOptions[$name] ?? null;
            $prefFromUser = static::getPreferenceForField( $name, $field, $userOptions );
 
            // If it validates, set it as the default
            // FIXME: That's not how the validate() function works! Values of nested fields
            // (e.g. CheckMatix) would be missing.
            if ( $prefFromUser !== null && // Make sure we're not just pulling nothing
                    $field->validate( $prefFromUser, $this->userOptionsManager->getOptions( $user ) ) === true ) {
                $info['default'] = $prefFromUser;
            } elseif ( $field->validate( $globalDefault, $this->userOptionsManager->getOptions( $user ) ) === true ) {
                $info['default'] = $globalDefault;
            } else {
                $globalDefault = json_encode( $globalDefault );
                throw new MWException(
                    "Default '$globalDefault' is invalid for preference $name of user " . $user->getName()
                );
            }
        }
 
        return $defaultPreferences;
    }
 
    public static function getPreferenceForField( $name, HTMLFormField $field, array $userOptions ) {
        $val = $userOptions[$name] ?? null;
 
        if ( $field instanceof \HTMLNestedFilterable ) {
            $val = [];
            $prefix = $field->mParams['prefix'] ?? $name;
            // Fetch all possible preference keys of the given field on this wiki.
            $keys = array_keys( $field->filterDataForSubmit( [] ) );
            foreach ( $keys as $key ) {
                if ( $userOptions[$prefix . $key] ?? false ) {
                    $val[] = $key;
                }
            }
        }
 
        return $val;
    }
 
    protected function getOptionFromUser( $name, $info, array $userOptions ) {
        $val = $userOptions[$name] ?? null;
 
        // Handling for multiselect preferences
        if ( ( isset( $info['type'] ) && $info['type'] == 'multiselect' ) ||
                ( isset( $info['class'] ) && $info['class'] == \HTMLMultiSelectField::class ) ) {
            $options = HTMLFormField::flattenOptions( $info['options-messages'] ?? $info['options'] );
            $prefix = $info['prefix'] ?? $name;
            $val = [];
 
            foreach ( $options as $value ) {
                if ( $userOptions["$prefix$value"] ?? false ) {
                    $val[] = $value;
                }
            }
        }
 
        // Handling for checkmatrix preferences
        if ( ( isset( $info['type'] ) && $info['type'] == 'checkmatrix' ) ||
                ( isset( $info['class'] ) && $info['class'] == \HTMLCheckMatrix::class ) ) {
            $columns = HTMLFormField::flattenOptions( $info['columns'] );
            $rows = HTMLFormField::flattenOptions( $info['rows'] );
            $prefix = $info['prefix'] ?? $name;
            $val = [];
 
            foreach ( $columns as $column ) {
                foreach ( $rows as $row ) {
                    if ( $userOptions["$prefix$column-$row"] ?? false ) {
                        $val[] = "$column-$row";
                    }
                }
            }
        }
 
        return $val;
    }
 
    protected function profilePreferences(
        User $user, IContextSource $context, &$defaultPreferences
    ) {
        // retrieving user name for GENDER and misc.
        $userName = $user->getName();
 
        // Information panel
        $defaultPreferences['username'] = [
            'type' => 'info',
            'label-message' => [ 'username', $userName ],
            'default' => $userName,
            'section' => 'personal/info',
        ];
 
        $lang = $context->getLanguage();
 
        // Get groups to which the user belongs, Skip the default * group, seems useless here
        $userEffectiveGroups = array_diff(
            $this->userGroupManager->getUserEffectiveGroups( $user ),
            [ '*' ]
        );
        $defaultPreferences['usergroups'] = [
            'type' => 'info',
            'label-message' => [ 'prefs-memberingroups',
                \Message::numParam( count( $userEffectiveGroups ) ), $userName ],
            'default' => function () use ( $user, $userEffectiveGroups, $context, $lang, $userName ) {
                $userGroupMemberships = $this->userGroupManager->getUserGroupMemberships( $user );
                $userGroups = $userMembers = $userTempGroups = $userTempMembers = [];
                foreach ( $userEffectiveGroups as $ueg ) {
                    $groupStringOrObject = $userGroupMemberships[$ueg] ?? $ueg;
 
                    $userG = UserGroupMembership::getLinkHTML( $groupStringOrObject, $context );
                    $userM = UserGroupMembership::getLinkHTML( $groupStringOrObject, $context, $userName );
 
                    // Store expiring groups separately, so we can place them before non-expiring
                    // groups in the list. This is to avoid the ambiguity of something like
                    // "administrator, bureaucrat (until X date)" -- users might wonder whether the
                    // expiry date applies to both groups, or just the last one
                    if ( $groupStringOrObject instanceof UserGroupMembership &&
                        $groupStringOrObject->getExpiry()
                    ) {
                        $userTempGroups[] = $userG;
                        $userTempMembers[] = $userM;
                    } else {
                        $userGroups[] = $userG;
                        $userMembers[] = $userM;
                    }
                }
                sort( $userGroups );
                sort( $userMembers );
                sort( $userTempGroups );
                sort( $userTempMembers );
                $userGroups = array_merge( $userTempGroups, $userGroups );
                $userMembers = array_merge( $userTempMembers, $userMembers );
                return $context->msg( 'prefs-memberingroups-type' )
                    ->rawParams( $lang->commaList( $userGroups ), $lang->commaList( $userMembers ) )
                    ->escaped();
            },
            'raw' => true,
            'section' => 'personal/info',
        ];
 
        $contribTitle = SpecialPage::getTitleFor( "Contributions", $userName );
        $formattedEditCount = $lang->formatNum( $user->getEditCount() );
        $editCount = $this->linkRenderer->makeLink( $contribTitle, $formattedEditCount );
 
        $defaultPreferences['editcount'] = [
            'type' => 'info',
            'raw' => true,
            'label-message' => 'prefs-edits',
            'default' => $editCount,
            'section' => 'personal/info',
        ];
 
        if ( $user->getRegistration() ) {
            $displayUser = $context->getUser();
            $userRegistration = $user->getRegistration();
            $defaultPreferences['registrationdate'] = [
                'type' => 'info',
                'label-message' => 'prefs-registration',
                'default' => $context->msg(
                    'prefs-registration-date-time',
                    $lang->userTimeAndDate( $userRegistration, $displayUser ),
                    $lang->userDate( $userRegistration, $displayUser ),
                    $lang->userTime( $userRegistration, $displayUser )
                )->text(),
                'section' => 'personal/info',
            ];
        }
 
        $canViewPrivateInfo = $user->isAllowed( 'viewmyprivateinfo' );
        $canEditPrivateInfo = $user->isAllowed( 'editmyprivateinfo' );
 
        // Actually changeable stuff
        $defaultPreferences['realname'] = [
            // (not really "private", but still shouldn't be edited without permission)
            'type' => $canEditPrivateInfo && $this->authManager->allowsPropertyChange( 'realname' )
                ? 'text' : 'info',
            'default' => $user->getRealName(),
            'section' => 'personal/info',
            'label-message' => 'yourrealname',
            'help-message' => 'prefs-help-realname',
        ];
 
        if ( $canEditPrivateInfo && $this->authManager->allowsAuthenticationDataChange(
            new PasswordAuthenticationRequest(), false )->isGood()
        ) {
            $defaultPreferences['password'] = [
                'type' => 'info',
                'raw' => true,
                'default' => (string)new \OOUI\ButtonWidget( [
                    'href' => SpecialPage::getTitleFor( 'ChangePassword' )->getLinkURL( [
                        'returnto' => SpecialPage::getTitleFor( 'Preferences' )->getPrefixedText()
                    ] ),
                    'label' => $context->msg( 'prefs-resetpass' )->text(),
                ] ),
                'label-message' => 'yourpassword',
                // email password reset feature only works for users that have an email set up
                'help' => $this->options->get( MainConfigNames::AllowRequiringEmailForResets ) &&
                        $user->getEmail()
                    ? $context->msg( 'prefs-help-yourpassword',
                        '[[#mw-prefsection-personal-email|{{int:prefs-email}}]]' )->parse()
                    : '',
                'section' => 'personal/info',
            ];
        }
        // Only show prefershttps if secure login is turned on
        if ( !$this->options->get( MainConfigNames::ForceHTTPS )
            && $this->options->get( MainConfigNames::SecureLogin )
        ) {
            $defaultPreferences['prefershttps'] = [
                'type' => 'toggle',
                'label-message' => 'tog-prefershttps',
                'help-message' => 'prefs-help-prefershttps',
                'section' => 'personal/info'
            ];
        }
 
        $defaultPreferences['downloaduserdata'] = [
            'type' => 'info',
            'raw' => true,
            'label-message' => 'prefs-user-downloaddata-label',
            'default' => Html::element(
                'a',
                [
                    'href' => $this->options->get( MainConfigNames::ScriptPath ) .
                        '/api.php?action=query&meta=userinfo&uiprop=*&formatversion=2',
                ],
                $context->msg( 'prefs-user-downloaddata-info' )->text()
            ),
            'help-message' => [ 'prefs-user-downloaddata-help-message', urlencode( $user->getTitleKey() ) ],
            'section' => 'personal/info',
        ];
 
        $defaultPreferences['restoreprefs'] = [
            'type' => 'info',
            'raw' => true,
            'label-message' => 'prefs-user-restoreprefs-label',
            'default' => Html::element(
                'a',
                [
                    'href' => SpecialPage::getTitleFor( 'Preferences' )
                        ->getSubpage( 'reset' )->getLocalURL()
                ],
                $context->msg( 'prefs-user-restoreprefs-info' )->text()
            ),
            'section' => 'personal/info',
        ];
 
        $languages = $this->languageNameUtils->getLanguageNames(
            LanguageNameUtils::AUTONYMS,
            LanguageNameUtils::SUPPORTED
        );
        $languageCode = $this->options->get( MainConfigNames::LanguageCode );
        if ( !array_key_exists( $languageCode, $languages ) ) {
            $languages[$languageCode] = $languageCode;
            // Sort the array again
            ksort( $languages );
        }
 
        $options = [];
        foreach ( $languages as $code => $name ) {
            $display = LanguageCode::bcp47( $code ) . ' - ' . $name;
            $options[$display] = $code;
        }
        $defaultPreferences['language'] = [
            'type' => 'select',
            'section' => 'personal/i18n',
            'options' => $options,
            'label-message' => 'yourlanguage',
        ];
 
        $neutralGenderMessage = $context->msg( 'gender-notknown' )->escaped() . (
            !$context->msg( 'gender-unknown' )->isDisabled()
                ? "<br>" . $context->msg( 'parentheses' )
                    ->params( $context->msg( 'gender-unknown' )->plain() )
                    ->escaped()
                : ''
        );
 
        $defaultPreferences['gender'] = [
            'type' => 'radio',
            'section' => 'personal/i18n',
            'options' => [
                $neutralGenderMessage => 'unknown',
                $context->msg( 'gender-female' )->escaped() => 'female',
                $context->msg( 'gender-male' )->escaped() => 'male',
            ],
            'label-message' => 'yourgender',
            'help-message' => 'prefs-help-gender',
        ];
 
        // see if there are multiple language variants to choose from
        if ( !$this->languageConverterFactory->isConversionDisabled() ) {
 
            foreach ( LanguageConverter::$languagesWithVariants as $langCode ) {
                if ( $langCode == $this->contLang->getCode() ) {
                    if ( !$this->languageConverter->hasVariants() ) {
                        continue;
                    }
 
                    $variants = $this->languageConverter->getVariants();
                    $variantArray = [];
                    foreach ( $variants as $v ) {
                        $v = str_replace( '_', '-', strtolower( $v ) );
                        $variantArray[$v] = $lang->getVariantname( $v, false );
                    }
 
                    $options = [];
                    foreach ( $variantArray as $code => $name ) {
                        $display = LanguageCode::bcp47( $code ) . ' - ' . $name;
                        $options[$display] = $code;
                    }
 
                    $defaultPreferences['variant'] = [
                        'label-message' => 'yourvariant',
                        'type' => 'select',
                        'options' => $options,
                        'section' => 'personal/i18n',
                        'help-message' => 'prefs-help-variant',
                    ];
                } else {
                    $defaultPreferences["variant-$langCode"] = [
                        'type' => 'api',
                    ];
                }
            }
        }
 
        // show a preview of the old signature first
        $oldsigWikiText = $this->parserFactory->getInstance()->preSaveTransform(
            '~~~',
            $context->getTitle(),
            $user,
            ParserOptions::newFromContext( $context )
        );
        $oldsigHTML = Parser::stripOuterParagraph(
            $context->getOutput()->parseAsContent( $oldsigWikiText )
        );
        $signatureFieldConfig = [];
        // Validate existing signature and show a message about it
        $signature = $this->userOptionsManager->getOption( $user, 'nickname' );
        $useFancySig = $this->userOptionsManager->getBoolOption( $user, 'fancysig' );
        if ( $useFancySig && $signature !== '' ) {
            $parserOpts = ParserOptions::newFromContext( $context );
            $validator = $this->signatureValidatorFactory
                ->newSignatureValidator( $user, $context, $parserOpts );
            $signatureErrors = $validator->validateSignature( $signature );
            if ( $signatureErrors ) {
                $sigValidation = $this->options->get( MainConfigNames::SignatureValidation );
                $oldsigHTML .= '<p><strong>' .
                    // Messages used here:
                    // * prefs-signature-invalid-warning
                    // * prefs-signature-invalid-new
                    // * prefs-signature-invalid-disallow
                    $context->msg( "prefs-signature-invalid-$sigValidation" )->parse() .
                    '</strong></p>';
 
                // On initial page load, show the warnings as well
                // (when posting, you get normal validation errors instead)
                foreach ( $signatureErrors as &$sigError ) {
                    $sigError = new \OOUI\HtmlSnippet( $sigError );
                }
                if ( !$context->getRequest()->wasPosted() ) {
                    $signatureFieldConfig = [
                        'warnings' => $sigValidation !== 'disallow' ? $signatureErrors : null,
                        'errors' => $sigValidation === 'disallow' ? $signatureErrors : null,
                    ];
                }
            }
        }
        $defaultPreferences['oldsig'] = [
            'type' => 'info',
            // Normally HTMLFormFields do not display warnings, so we need to use 'rawrow'
            // and provide the entire OOUI\FieldLayout here
            'rawrow' => true,
            'default' => new \OOUI\FieldLayout(
                new \OOUI\LabelWidget( [
                    'label' => new \OOUI\HtmlSnippet( $oldsigHTML ),
                ] ),
                [
                    'align' => 'top',
                    'label' => new \OOUI\HtmlSnippet( $context->msg( 'tog-oldsig' )->parse() )
                ] + $signatureFieldConfig
            ),
            'section' => 'personal/signature',
        ];
        $defaultPreferences['nickname'] = [
            'type' => $this->authManager->allowsPropertyChange( 'nickname' ) ? 'text' : 'info',
            'maxlength' => $this->options->get( MainConfigNames::MaxSigChars ),
            'label-message' => 'yournick',
            'validation-callback' => function ( $signature, $alldata, HTMLForm $form ) {
                return $this->validateSignature( $signature, $alldata, $form );
            },
            'section' => 'personal/signature',
            'filter-callback' => function ( $signature, array $alldata, HTMLForm $form ) {
                return $this->cleanSignature( $signature, $alldata, $form );
            },
        ];
        $defaultPreferences['fancysig'] = [
            'type' => 'toggle',
            'label-message' => 'tog-fancysig',
            // show general help about signature at the bottom of the section
            'help-message' => 'prefs-help-signature',
            'section' => 'personal/signature'
        ];
 
        // Email preferences
        if ( $this->options->get( MainConfigNames::EnableEmail ) ) {
            if ( $canViewPrivateInfo ) {
                $helpMessages = [];
                $helpMessages[] = $this->options->get( MainConfigNames::EmailConfirmToEdit )
                        ? 'prefs-help-email-required'
                        : 'prefs-help-email';
 
                if ( $this->options->get( MainConfigNames::EnableUserEmail ) ) {
                    // additional messages when users can send email to each other
                    $helpMessages[] = 'prefs-help-email-others';
                }
 
                $emailAddress = $user->getEmail() ? htmlspecialchars( $user->getEmail() ) : '';
                if ( $canEditPrivateInfo && $this->authManager->allowsPropertyChange( 'emailaddress' ) ) {
                    $button = new \OOUI\ButtonWidget( [
                        'href' => SpecialPage::getTitleFor( 'ChangeEmail' )->getLinkURL( [
                            'returnto' => SpecialPage::getTitleFor( 'Preferences' )->getPrefixedText()
                        ] ),
                        'label' =>
                            $context->msg( $user->getEmail() ? 'prefs-changeemail' : 'prefs-setemail' )->text(),
                    ] );
 
                    $emailAddress .= $emailAddress == '' ? $button : ( '<br />' . $button );
                }
 
                $defaultPreferences['emailaddress'] = [
                    'type' => 'info',
                    'raw' => true,
                    'default' => $emailAddress,
                    'label-message' => 'youremail',
                    'section' => 'personal/email',
                    'help-messages' => $helpMessages,
                    // 'cssclass' chosen below
                ];
            }
 
            $disableEmailPrefs = false;
 
            if ( $this->options->get( MainConfigNames::AllowRequiringEmailForResets ) ) {
                $defaultPreferences['requireemail'] = [
                    'type' => 'toggle',
                    'label-message' => 'tog-requireemail',
                    'help-message' => 'prefs-help-requireemail',
                    'section' => 'personal/email',
                    'disabled' => !$user->getEmail(),
                ];
            }
 
            if ( $this->options->get( MainConfigNames::EmailAuthentication ) ) {
                if ( $user->getEmail() ) {
                    if ( $user->getEmailAuthenticationTimestamp() ) {
                        // date and time are separate parameters to facilitate localisation.
                        // $time is kept for backward compat reasons.
                        // 'emailauthenticated' is also used in SpecialConfirmemail.php
                        $displayUser = $context->getUser();
                        $emailTimestamp = $user->getEmailAuthenticationTimestamp();
                        $time = $lang->userTimeAndDate( $emailTimestamp, $displayUser );
                        $d = $lang->userDate( $emailTimestamp, $displayUser );
                        $t = $lang->userTime( $emailTimestamp, $displayUser );
                        $emailauthenticated = $context->msg( 'emailauthenticated',
                            $time, $d, $t )->parse() . '<br />';
                        $emailauthenticationclass = 'mw-email-authenticated';
                    } else {
                        $disableEmailPrefs = true;
                        $emailauthenticated = $context->msg( 'emailnotauthenticated' )->parse() . '<br />' .
                            new \OOUI\ButtonWidget( [
                                'href' => SpecialPage::getTitleFor( 'Confirmemail' )->getLinkURL(),
                                'label' => $context->msg( 'emailconfirmlink' )->text(),
                            ] );
                        $emailauthenticationclass = "mw-email-not-authenticated";
                    }
                } else {
                    $disableEmailPrefs = true;
                    $emailauthenticated = $context->msg( 'noemailprefs' )->escaped();
                    $emailauthenticationclass = 'mw-email-none';
                }
 
                if ( $canViewPrivateInfo ) {
                    $defaultPreferences['emailauthentication'] = [
                        'type' => 'info',
                        'raw' => true,
                        'section' => 'personal/email',
                        'label-message' => 'prefs-emailconfirm-label',
                        'default' => $emailauthenticated,
                        // Apply the same CSS class used on the input to the message:
                        'cssclass' => $emailauthenticationclass,
                    ];
                }
            }
 
            if ( $this->options->get( MainConfigNames::EnableUserEmail ) &&
                $user->isAllowed( 'sendemail' )
            ) {
                $defaultPreferences['disablemail'] = [
                    'id' => 'wpAllowEmail',
                    'type' => 'toggle',
                    'invert' => true,
                    'section' => 'personal/email',
                    'label-message' => 'allowemail',
                    'disabled' => $disableEmailPrefs,
                ];
 
                $defaultPreferences['email-allow-new-users'] = [
                    'id' => 'wpAllowEmailFromNewUsers',
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'email-allow-new-users-label',
                    'disabled' => $disableEmailPrefs,
                    'disable-if' => [ '!==', 'disablemail', '1' ],
                ];
 
                $defaultPreferences['ccmeonemails'] = [
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-ccmeonemails',
                    'disabled' => $disableEmailPrefs,
                ];
 
                if ( $this->options->get( MainConfigNames::EnableUserEmailMuteList ) ) {
                    $defaultPreferences['email-blacklist'] = [
                        'type' => 'usersmultiselect',
                        'label-message' => 'email-mutelist-label',
                        'section' => 'personal/email',
                        'disabled' => $disableEmailPrefs,
                        'filter' => MultiUsernameFilter::class,
                    ];
                }
            }
 
            if ( $this->options->get( MainConfigNames::EnotifWatchlist ) ) {
                $defaultPreferences['enotifwatchlistpages'] = [
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-enotifwatchlistpages',
                    'disabled' => $disableEmailPrefs,
                ];
            }
            if ( $this->options->get( MainConfigNames::EnotifUserTalk ) ) {
                $defaultPreferences['enotifusertalkpages'] = [
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-enotifusertalkpages',
                    'disabled' => $disableEmailPrefs,
                ];
            }
            if ( $this->options->get( MainConfigNames::EnotifUserTalk ) ||
            $this->options->get( MainConfigNames::EnotifWatchlist ) ) {
                if ( $this->options->get( MainConfigNames::EnotifMinorEdits ) ) {
                    $defaultPreferences['enotifminoredits'] = [
                        'type' => 'toggle',
                        'section' => 'personal/email',
                        'label-message' => 'tog-enotifminoredits',
                        'disabled' => $disableEmailPrefs,
                    ];
                }
 
                if ( $this->options->get( MainConfigNames::EnotifRevealEditorAddress ) ) {
                    $defaultPreferences['enotifrevealaddr'] = [
                        'type' => 'toggle',
                        'section' => 'personal/email',
                        'label-message' => 'tog-enotifrevealaddr',
                        'disabled' => $disableEmailPrefs,
                    ];
                }
            }
        }
    }
 
    protected function skinPreferences( User $user, IContextSource $context, &$defaultPreferences ) {
        // Skin selector, if there is at least one valid skin
        $validSkinNames = $this->getValidSkinNames( $user, $context );
        if ( $validSkinNames ) {
            $defaultPreferences['skin'] = [
                'type' => 'radio',
                'options' => $this->generateSkinOptions( $user, $context, $validSkinNames ),
                'section' => 'rendering/skin',
            ];
            $hideCond = [ 'AND' ];
            foreach ( $validSkinNames as $skinName => $_ ) {
                $options = $this->skinFactory->getSkinOptions( $skinName );
                if ( $options['responsive'] ?? false ) {
                    $hideCond[] = [ '!==', 'skin', $skinName ];
                }
            }
            if ( $hideCond === [ 'AND' ] ) {
                $hideCond = [];
            }
            $defaultPreferences['skin-responsive'] = [
                'type' => 'check',
                'label-message' => 'prefs-skin-responsive',
                'section' => 'rendering/skin/skin-prefs',
                'help-message' => 'prefs-help-skin-responsive',
                'hide-if' => $hideCond,
            ];
        }
 
        $allowUserCss = $this->options->get( MainConfigNames::AllowUserCss );
        $allowUserJs = $this->options->get( MainConfigNames::AllowUserJs );
        $safeMode = $this->userOptionsManager->getOption( $user, 'forcesafemode' );
        // Create links to user CSS/JS pages for all skins.
        // This code is basically copied from generateSkinOptions().
        // @todo Refactor this and the similar code in generateSkinOptions().
        if ( $allowUserCss || $allowUserJs ) {
            if ( $safeMode ) {
                $defaultPreferences['customcssjs-safemode'] = [
                    'type' => 'info',
                    'raw' => true,
                    'default' => Html::warningBox( $context->msg( 'prefs-custom-cssjs-safemode' )->parse() ),
                    'section' => 'rendering/skin',
                ];
            } else {
                $linkTools = [];
                $userName = $user->getName();
 
                if ( $allowUserCss ) {
                    $cssPage = Title::makeTitleSafe( NS_USER, $userName . '/common.css' );
                    $cssLinkText = $context->msg( 'prefs-custom-css' )->text();
                    $linkTools[] = $this->linkRenderer->makeLink( $cssPage, $cssLinkText );
                }
 
                if ( $allowUserJs ) {
                    $jsPage = Title::makeTitleSafe( NS_USER, $userName . '/common.js' );
                    $jsLinkText = $context->msg( 'prefs-custom-js' )->text();
                    $linkTools[] = $this->linkRenderer->makeLink( $jsPage, $jsLinkText );
                }
 
                $defaultPreferences['commoncssjs'] = [
                    'type' => 'info',
                    'raw' => true,
                    'default' => $context->getLanguage()->pipeList( $linkTools ),
                    'label-message' => 'prefs-common-config',
                    'section' => 'rendering/skin',
                ];
            }
        }
    }
 
    protected function filesPreferences( IContextSource $context, &$defaultPreferences ) {
        $defaultPreferences['imagesize'] = [
            'type' => 'select',
            'options' => $this->getImageSizes( $context ),
            'label-message' => 'imagemaxsize',
            'section' => 'rendering/files',
        ];
        $defaultPreferences['thumbsize'] = [
            'type' => 'select',
            'options' => $this->getThumbSizes( $context ),
            'label-message' => 'thumbsize',
            'section' => 'rendering/files',
        ];
    }
 
    protected function datetimePreferences(
        User $user, IContextSource $context, &$defaultPreferences
    ) {
        $dateOptions = $this->getDateOptions( $context );
        if ( $dateOptions ) {
            $defaultPreferences['date'] = [
                'type' => 'radio',
                'options' => $dateOptions,
                'section' => 'rendering/dateformat',
            ];
        }
 
        // Info
        $now = wfTimestampNow();
        $lang = $context->getLanguage();
        $nowlocal = Xml::element( 'span', [ 'id' => 'wpLocalTime' ],
            $lang->userTime( $now, $user ) );
        $nowserver = $lang->userTime( $now, $user,
                [ 'format' => false, 'timecorrection' => false ] ) .
            Html::hidden( 'wpServerTime', (int)substr( $now, 8, 2 ) * 60 + (int)substr( $now, 10, 2 ) );
 
        $defaultPreferences['nowserver'] = [
            'type' => 'info',
            'raw' => 1,
            'label-message' => 'servertime',
            'default' => $nowserver,
            'section' => 'rendering/timeoffset',
        ];
 
        $defaultPreferences['nowlocal'] = [
            'type' => 'info',
            'raw' => 1,
            'label-message' => 'localtime',
            'default' => $nowlocal,
            'section' => 'rendering/timeoffset',
        ];
 
        $userTimeCorrection = (string)$this->userOptionsManager->getOption( $user, 'timecorrection' );
        // This value should already be normalized by UserTimeCorrection, so it should always be valid and not
        // in the legacy format. However, let's be sure about that and normalize it again.
        // Also, recompute the offset because it can change with DST.
        $userTimeCorrectionObj = new UserTimeCorrection(
            $userTimeCorrection,
            null,
            $this->options->get( MainConfigNames::LocalTZoffset )
        );
 
        if ( $userTimeCorrectionObj->getCorrectionType() === UserTimeCorrection::OFFSET ) {
            $tzDefault = UserTimeCorrection::formatTimezoneOffset( $userTimeCorrectionObj->getTimeOffset() );
        } else {
            $tzDefault = $userTimeCorrectionObj->toString();
        }
 
        $defaultPreferences['timecorrection'] = [
            'type' => 'timezone',
            'label-message' => 'timezonelegend',
            'default' => $tzDefault,
            'size' => 20,
            'section' => 'rendering/timeoffset',
            'id' => 'wpTimeCorrection',
            'filter' => TimezoneFilter::class,
        ];
    }
 
    protected function renderingPreferences(
        User $user,
        MessageLocalizer $l10n,
        &$defaultPreferences
    ) {
        // Diffs
        $defaultPreferences['diffonly'] = [
            'type' => 'toggle',
            'section' => 'rendering/diffs',
            'label-message' => 'tog-diffonly',
        ];
        $defaultPreferences['norollbackdiff'] = [
            'type' => 'toggle',
            'section' => 'rendering/diffs',
            'label-message' => 'tog-norollbackdiff',
        ];
        $defaultPreferences['diff-type'] = [
            'type' => 'api',
        ];
 
        // Page Rendering
        if ( $this->options->get( MainConfigNames::AllowUserCssPrefs ) ) {
            $defaultPreferences['underline'] = [
                'type' => 'select',
                'options' => [
                    $l10n->msg( 'underline-never' )->text() => 0,
                    $l10n->msg( 'underline-always' )->text() => 1,
                    $l10n->msg( 'underline-default' )->text() => 2,
                ],
                'label-message' => 'tog-underline',
                'section' => 'rendering/advancedrendering',
            ];
        }
 
        $defaultPreferences['showhiddencats'] = [
            'type' => 'toggle',
            'section' => 'rendering/advancedrendering',
            'label-message' => 'tog-showhiddencats'
        ];
 
        if ( $user->isAllowed( 'rollback' ) ) {
            $defaultPreferences['showrollbackconfirmation'] = [
                'type' => 'toggle',
                'section' => 'rendering/advancedrendering',
                'label-message' => 'tog-showrollbackconfirmation',
            ];
        }
 
        $defaultPreferences['forcesafemode'] = [
            'type' => 'toggle',
            'section' => 'rendering/advancedrendering',
            'label-message' => 'tog-forcesafemode',
            'help-message' => 'prefs-help-forcesafemode'
        ];
    }
 
    protected function editingPreferences( User $user, MessageLocalizer $l10n, &$defaultPreferences ) {
        $defaultPreferences['editsectiononrightclick'] = [
            'type' => 'toggle',
            'section' => 'editing/advancedediting',
            'label-message' => 'tog-editsectiononrightclick',
        ];
        $defaultPreferences['editondblclick'] = [
            'type' => 'toggle',
            'section' => 'editing/advancedediting',
            'label-message' => 'tog-editondblclick',
        ];
 
        if ( $this->options->get( MainConfigNames::AllowUserCssPrefs ) ) {
            $defaultPreferences['editfont'] = [
                'type' => 'select',
                'section' => 'editing/editor',
                'label-message' => 'editfont-style',
                'options' => [
                    $l10n->msg( 'editfont-monospace' )->text() => 'monospace',
                    $l10n->msg( 'editfont-sansserif' )->text() => 'sans-serif',
                    $l10n->msg( 'editfont-serif' )->text() => 'serif',
                ]
            ];
        }
 
        if ( $user->isAllowed( 'minoredit' ) ) {
            $defaultPreferences['minordefault'] = [
                'type' => 'toggle',
                'section' => 'editing/editor',
                'label-message' => 'tog-minordefault',
            ];
        }
 
        $defaultPreferences['forceeditsummary'] = [
            'type' => 'toggle',
            'section' => 'editing/editor',
            'label-message' => 'tog-forceeditsummary',
        ];
        $defaultPreferences['useeditwarning'] = [
            'type' => 'toggle',
            'section' => 'editing/editor',
            'label-message' => 'tog-useeditwarning',
        ];
 
        $defaultPreferences['previewonfirst'] = [
            'type' => 'toggle',
            'section' => 'editing/preview',
            'label-message' => 'tog-previewonfirst',
        ];
        $defaultPreferences['previewontop'] = [
            'type' => 'toggle',
            'section' => 'editing/preview',
            'label-message' => 'tog-previewontop',
        ];
        $defaultPreferences['uselivepreview'] = [
            'type' => 'toggle',
            'section' => 'editing/preview',
            'label-message' => 'tog-uselivepreview',
        ];
    }
 
    protected function rcPreferences( User $user, MessageLocalizer $l10n, &$defaultPreferences ) {
        $rcMaxAge = $this->options->get( MainConfigNames::RCMaxAge );
        $rcMax = ceil( $rcMaxAge / ( 3600 * 24 ) );
        $defaultPreferences['rcdays'] = [
            'type' => 'float',
            'label-message' => 'recentchangesdays',
            'section' => 'rc/displayrc',
            'min' => 1 / 24,
            'max' => $rcMax,
            'help-message' => [ 'recentchangesdays-max', Message::numParam( $rcMax ) ],
        ];
        $defaultPreferences['rclimit'] = [
            'type' => 'int',
            'min' => 1,
            'max' => 1000,
            'label-message' => 'recentchangescount',
            'help-message' => 'prefs-help-recentchangescount',
            'section' => 'rc/displayrc',
            'filter' => IntvalFilter::class,
        ];
        $defaultPreferences['usenewrc'] = [
            'type' => 'toggle',
            'label-message' => 'tog-usenewrc',
            'section' => 'rc/advancedrc',
        ];
        $defaultPreferences['hideminor'] = [
            'type' => 'toggle',
            'label-message' => 'tog-hideminor',
            'section' => 'rc/changesrc',
        ];
        $defaultPreferences['pst-cssjs'] = [
            'type' => 'api',
        ];
        $defaultPreferences['rcfilters-rc-collapsed'] = [
            'type' => 'api',
        ];
        $defaultPreferences['rcfilters-wl-collapsed'] = [
            'type' => 'api',
        ];
        $defaultPreferences['rcfilters-saved-queries'] = [
            'type' => 'api',
        ];
        $defaultPreferences['rcfilters-wl-saved-queries'] = [
            'type' => 'api',
        ];
        // Override RCFilters preferences for RecentChanges 'limit'
        $defaultPreferences['rcfilters-limit'] = [
            'type' => 'api',
        ];
        $defaultPreferences['rcfilters-saved-queries-versionbackup'] = [
            'type' => 'api',
        ];
        $defaultPreferences['rcfilters-wl-saved-queries-versionbackup'] = [
            'type' => 'api',
        ];
 
        if ( $this->options->get( MainConfigNames::RCWatchCategoryMembership ) ) {
            $defaultPreferences['hidecategorization'] = [
                'type' => 'toggle',
                'label-message' => 'tog-hidecategorization',
                'section' => 'rc/changesrc',
            ];
        }
 
        if ( $user->useRCPatrol() ) {
            $defaultPreferences['hidepatrolled'] = [
                'type' => 'toggle',
                'section' => 'rc/changesrc',
                'label-message' => 'tog-hidepatrolled',
            ];
        }
 
        if ( $user->useNPPatrol() ) {
            $defaultPreferences['newpageshidepatrolled'] = [
                'type' => 'toggle',
                'section' => 'rc/changesrc',
                'label-message' => 'tog-newpageshidepatrolled',
            ];
        }
 
        if ( $this->options->get( MainConfigNames::RCShowWatchingUsers ) ) {
            $defaultPreferences['shownumberswatching'] = [
                'type' => 'toggle',
                'section' => 'rc/advancedrc',
                'label-message' => 'tog-shownumberswatching',
            ];
        }
 
        $defaultPreferences['rcenhancedfilters-disable'] = [
            'type' => 'toggle',
            'section' => 'rc/advancedrc',
            'label-message' => 'rcfilters-preference-label',
            'help-message' => 'rcfilters-preference-help',
        ];
    }
 
    protected function watchlistPreferences(
        User $user, IContextSource $context, &$defaultPreferences
    ) {
        $watchlistdaysMax = ceil( $this->options->get( MainConfigNames::RCMaxAge ) / ( 3600 * 24 ) );
 
        if ( $user->isAllowed( 'editmywatchlist' ) ) {
            $editWatchlistLinks = '';
            $editWatchlistModes = [
                'edit' => [ 'subpage' => false, 'flags' => [] ],
                'raw' => [ 'subpage' => 'raw', 'flags' => [] ],
                'clear' => [ 'subpage' => 'clear', 'flags' => [ 'destructive' ] ],
            ];
            foreach ( $editWatchlistModes as $mode => $options ) {
                // Messages: prefs-editwatchlist-edit, prefs-editwatchlist-raw, prefs-editwatchlist-clear
                $editWatchlistLinks .=
                    new \OOUI\ButtonWidget( [
                        'href' => SpecialPage::getTitleFor( 'EditWatchlist', $options['subpage'] )->getLinkURL(),
                        'flags' => $options[ 'flags' ],
                        'label' => new \OOUI\HtmlSnippet(
                            $context->msg( "prefs-editwatchlist-{$mode}" )->parse()
                        ),
                    ] );
            }
 
            $defaultPreferences['editwatchlist'] = [
                'type' => 'info',
                'raw' => true,
                'default' => $editWatchlistLinks,
                'label-message' => 'prefs-editwatchlist-label',
                'section' => 'watchlist/editwatchlist',
            ];
        }
 
        $defaultPreferences['watchlistdays'] = [
            'type' => 'float',
            'min' => 1 / 24,
            'max' => $watchlistdaysMax,
            'section' => 'watchlist/displaywatchlist',
            'help-message' => [ 'prefs-watchlist-days-max', Message::numParam( $watchlistdaysMax ) ],
            'label-message' => 'prefs-watchlist-days',
        ];
        $defaultPreferences['wllimit'] = [
            'type' => 'int',
            'min' => 1,
            'max' => 1000,
            'label-message' => 'prefs-watchlist-edits',
            'help-message' => 'prefs-watchlist-edits-max',
            'section' => 'watchlist/displaywatchlist',
            'filter' => IntvalFilter::class,
        ];
        $defaultPreferences['extendwatchlist'] = [
            'type' => 'toggle',
            'section' => 'watchlist/advancedwatchlist',
            'label-message' => 'tog-extendwatchlist',
        ];
        $defaultPreferences['watchlisthideminor'] = [
            'type' => 'toggle',
            'section' => 'watchlist/changeswatchlist',
            'label-message' => 'tog-watchlisthideminor',
        ];
        $defaultPreferences['watchlisthidebots'] = [
            'type' => 'toggle',
            'section' => 'watchlist/changeswatchlist',
            'label-message' => 'tog-watchlisthidebots',
        ];
        $defaultPreferences['watchlisthideown'] = [
            'type' => 'toggle',
            'section' => 'watchlist/changeswatchlist',
            'label-message' => 'tog-watchlisthideown',
        ];
        $defaultPreferences['watchlisthideanons'] = [
            'type' => 'toggle',
            'section' => 'watchlist/changeswatchlist',
            'label-message' => 'tog-watchlisthideanons',
        ];
        $defaultPreferences['watchlisthideliu'] = [
            'type' => 'toggle',
            'section' => 'watchlist/changeswatchlist',
            'label-message' => 'tog-watchlisthideliu',
        ];
 
        if ( !SpecialWatchlist::checkStructuredFilterUiEnabled( $user ) ) {
            $defaultPreferences['watchlistreloadautomatically'] = [
                'type' => 'toggle',
                'section' => 'watchlist/advancedwatchlist',
                'label-message' => 'tog-watchlistreloadautomatically',
            ];
        }
 
        $defaultPreferences['watchlistunwatchlinks'] = [
            'type' => 'toggle',
            'section' => 'watchlist/advancedwatchlist',
            'label-message' => 'tog-watchlistunwatchlinks',
        ];
 
        if ( $this->options->get( MainConfigNames::RCWatchCategoryMembership ) ) {
            $defaultPreferences['watchlisthidecategorization'] = [
                'type' => 'toggle',
                'section' => 'watchlist/changeswatchlist',
                'label-message' => 'tog-watchlisthidecategorization',
            ];
        }
 
        if ( $user->useRCPatrol() ) {
            $defaultPreferences['watchlisthidepatrolled'] = [
                'type' => 'toggle',
                'section' => 'watchlist/changeswatchlist',
                'label-message' => 'tog-watchlisthidepatrolled',
            ];
        }
 
        $watchTypes = [
            'edit' => 'watchdefault',
            'move' => 'watchmoves',
        ];
 
        // Kinda hacky
        if ( $user->isAllowedAny( 'createpage', 'createtalk' ) ) {
            $watchTypes['read'] = 'watchcreations';
        }
 
        // Move uncommon actions to end of list
        $watchTypes += [
            'rollback' => 'watchrollback',
            'upload' => 'watchuploads',
            'delete' => 'watchdeletion',
        ];
 
        foreach ( $watchTypes as $action => $pref ) {
            if ( $user->isAllowed( $action ) ) {
                // Messages:
                // tog-watchdefault, tog-watchmoves, tog-watchdeletion, tog-watchcreations, tog-watchuploads
                // tog-watchrollback
                $defaultPreferences[$pref] = [
                    'type' => 'toggle',
                    'section' => 'watchlist/pageswatchlist',
                    'label-message' => "tog-$pref",
                ];
            }
        }
 
        $defaultPreferences['watchlisttoken'] = [
            'type' => 'api',
        ];
 
        $tokenButton = new \OOUI\ButtonWidget( [
            'href' => SpecialPage::getTitleFor( 'ResetTokens' )->getLinkURL( [
                'returnto' => SpecialPage::getTitleFor( 'Preferences' )->getPrefixedText()
            ] ),
            'label' => $context->msg( 'prefs-watchlist-managetokens' )->text(),
        ] );
        $defaultPreferences['watchlisttoken-info'] = [
            'type' => 'info',
            'section' => 'watchlist/tokenwatchlist',
            'label-message' => 'prefs-watchlist-token',
            'help-message' => 'prefs-help-tokenmanagement',
            'raw' => true,
            'default' => (string)$tokenButton,
        ];
 
        $defaultPreferences['wlenhancedfilters-disable'] = [
            'type' => 'toggle',
            'section' => 'watchlist/advancedwatchlist',
            'label-message' => 'rcfilters-watchlist-preference-label',
            'help-message' => 'rcfilters-watchlist-preference-help',
        ];
    }
 
    protected function searchPreferences( $context, &$defaultPreferences ) {
        $defaultPreferences['search-special-page'] = [
            'type' => 'api',
        ];
 
        foreach ( $this->nsInfo->getValidNamespaces() as $n ) {
            $defaultPreferences['searchNs' . $n] = [
                'type' => 'api',
            ];
        }
 
        if ( $this->options->get( MainConfigNames::SearchMatchRedirectPreference ) ) {
            $defaultPreferences['search-match-redirect'] = [
                'type' => 'toggle',
                'section' => 'searchoptions/searchmisc',
                'label-message' => 'search-match-redirect-label',
                'help-message' => 'search-match-redirect-help',
            ];
        } else {
            $defaultPreferences['search-match-redirect'] = [
                'type' => 'api',
            ];
        }
 
        $defaultPreferences['searchlimit'] = [
            'type' => 'int',
            'min' => 1,
            'max' => 500,
            'section' => 'searchoptions/searchmisc',
            'label-message' => 'searchlimit-label',
            'help-message' => $context->msg( 'searchlimit-help', 500 ),
            'filter' => IntvalFilter::class,
        ];
 
        // show a preference for thumbnails from namespaces other than NS_FILE,
        // only when there they're actually configured to be served
        $thumbNamespaces = $this->config->get( MainConfigNames::ThumbnailNamespaces );
        $thumbNamespacesFormatted = array_combine(
            $thumbNamespaces,
            array_map(
                static function ( $namespaceId ) use ( $context ) {
                    return $namespaceId === NS_MAIN
                        ? $context->msg( 'blanknamespace' )->escaped()
                        : $context->getLanguage()->getFormattedNsText( $namespaceId );
                },
                $thumbNamespaces
            )
        );
        $defaultThumbNamespacesFormatted =
            array_intersect_key( $thumbNamespacesFormatted, [ NS_FILE => 1 ] ) ?? [];
        $extraThumbNamespacesFormatted =
            array_diff_key( $thumbNamespacesFormatted, [ NS_FILE => 1 ] );
        if ( $extraThumbNamespacesFormatted ) {
            $defaultPreferences['search-thumbnail-extra-namespaces'] = [
                'type' => 'toggle',
                'section' => 'searchoptions/searchmisc',
                'label-message' => 'search-thumbnail-extra-namespaces-label',
                'help-message' => $context->msg(
                    'search-thumbnail-extra-namespaces-message',
                    $context->getLanguage()->listToText( $extraThumbNamespacesFormatted ),
                    count( $extraThumbNamespacesFormatted ),
                    $context->getLanguage()->listToText( $defaultThumbNamespacesFormatted ),
                    count( $defaultThumbNamespacesFormatted )
                ),
            ];
        }
    }
 
    /*
     * Custom skin string comparison function that takes into account current and preferred skins.
     *
     * @param string $a
     * @param string $b
     * @param string $currentSkin
     * @param array $preferredSkins
     * @return int
     */
    private static function sortSkinNames( $a, $b, $currentSkin, $preferredSkins ) {
        // Display the current skin first in the list
        if ( strcasecmp( $a, $currentSkin ) === 0 ) {
            return -1;
        }
        if ( strcasecmp( $b, $currentSkin ) === 0 ) {
            return 1;
        }
        // Display preferred skins over other skins
        if ( count( $preferredSkins ) ) {
            $aPreferred = array_search( $a, $preferredSkins );
            $bPreferred = array_search( $b, $preferredSkins );
            // Cannot use ! operator because array_search returns the
            // index of the array item if found (i.e. 0) and false otherwise
            if ( $aPreferred !== false && $bPreferred === false ) {
                return -1;
            }
            if ( $aPreferred === false && $bPreferred !== false ) {
                return 1;
            }
            // When both skins are preferred, default to the ordering
            // specified by the preferred skins config array
            if ( $aPreferred !== false && $bPreferred !== false ) {
                return strcasecmp( $aPreferred, $bPreferred );
            }
        }
        // Use normal string comparison if both strings are not preferred
        return strcasecmp( $a, $b );
    }
 
    private function getValidSkinNames( User $user, IContextSource $context ) {
        // Only show skins that aren't disabled
        $validSkinNames = $this->skinFactory->getAllowedSkins();
        $allInstalledSkins = $this->skinFactory->getInstalledSkins();
 
        // Display the installed skin the user has specifically requested via useskin=….
        $useSkin = $context->getRequest()->getRawVal( 'useskin' );
        if ( isset( $allInstalledSkins[$useSkin] )
            && $context->msg( "skinname-$useSkin" )->exists()
        ) {
            $validSkinNames[$useSkin] = $useSkin;
        }
 
        // Display the skin if the user has set it as a preference already before it was hidden.
        $currentUserSkin = $this->userOptionsManager->getOption( $user, 'skin' );
        if ( isset( $allInstalledSkins[$currentUserSkin] )
            && $context->msg( "skinname-$currentUserSkin" )->exists()
        ) {
            $validSkinNames[$currentUserSkin] = $currentUserSkin;
        }
 
        foreach ( $validSkinNames as $skinkey => &$skinname ) {
            $msg = $context->msg( "skinname-{$skinkey}" );
            if ( $msg->exists() ) {
                $skinname = htmlspecialchars( $msg->text() );
            }
        }
 
        $preferredSkins = $this->config->get( MainConfigNames::SkinsPreferred );
        // Sort by the internal name, so that the ordering is the same for each display language,
        // especially if some skin names are translated to use a different alphabet and some are not.
        uksort( $validSkinNames, function ( $a, $b ) use ( $currentUserSkin, $preferredSkins ) {
            return $this->sortSkinNames( $a, $b, $currentUserSkin, $preferredSkins );
        } );
 
        return $validSkinNames;
    }
 
    protected function generateSkinOptions( User $user, IContextSource $context, array $validSkinNames ) {
        $ret = [];
 
        $mptitle = Title::newMainPage();
        $previewtext = $context->msg( 'skin-preview' )->escaped();
        $defaultSkin = $this->options->get( MainConfigNames::DefaultSkin );
        $allowUserCss = $this->options->get( MainConfigNames::AllowUserCss );
        $allowUserJs = $this->options->get( MainConfigNames::AllowUserJs );
        $safeMode = $this->userOptionsManager->getOption( $user, 'forcesafemode' );
        $foundDefault = false;
        foreach ( $validSkinNames as $skinkey => $sn ) {
            $linkTools = [];
 
            // Mark the default skin
            if ( strcasecmp( $skinkey, $defaultSkin ) === 0 ) {
                $linkTools[] = $context->msg( 'default' )->escaped();
                $foundDefault = true;
            }
 
            // Create talk page link if relevant message exists.
            $talkPageMsg = $context->msg( "$skinkey-prefs-talkpage" );
            if ( $talkPageMsg->exists() ) {
                $linkTools[] = $talkPageMsg->parse();
            }
 
            // Create preview link
            $mplink = htmlspecialchars( $mptitle->getLocalURL( [ 'useskin' => $skinkey ] ) );
            $linkTools[] = "<a target='_blank' href=\"$mplink\">$previewtext</a>";
 
            if ( !$safeMode ) {
                // Create links to user CSS/JS pages
                // @todo Refactor this and the similar code in skinPreferences().
                if ( $allowUserCss ) {
                    $cssPage = Title::makeTitleSafe( NS_USER, $user->getName() . '/' . $skinkey . '.css' );
                    $cssLinkText = $context->msg( 'prefs-custom-css' )->text();
                    $linkTools[] = $this->linkRenderer->makeLink( $cssPage, $cssLinkText );
                }
 
                if ( $allowUserJs ) {
                    $jsPage = Title::makeTitleSafe( NS_USER, $user->getName() . '/' . $skinkey . '.js' );
                    $jsLinkText = $context->msg( 'prefs-custom-js' )->text();
                    $linkTools[] = $this->linkRenderer->makeLink( $jsPage, $jsLinkText );
                }
            }
 
            $display = $sn . ' ' . $context->msg( 'parentheses' )
                ->rawParams( $context->getLanguage()->pipeList( $linkTools ) )
                ->escaped();
            $ret[$display] = $skinkey;
        }
 
        if ( !$foundDefault ) {
            // If the default skin is not available, things are going to break horribly because the
            // default value for skin selector will not be a valid value. Let's just not show it then.
            return [];
        }
 
        return $ret;
    }
 
    protected function getDateOptions( IContextSource $context ) {
        $lang = $context->getLanguage();
        $dateopts = $lang->getDatePreferences();
 
        $ret = [];
 
        if ( $dateopts ) {
            if ( !in_array( 'default', $dateopts ) ) {
                $dateopts[] = 'default'; // Make sure default is always valid T21237
            }
 
            // FIXME KLUGE: site default might not be valid for user language
            global $wgDefaultUserOptions;
            if ( !in_array( $wgDefaultUserOptions['date'], $dateopts ) ) {
                $wgDefaultUserOptions['date'] = 'default';
            }
 
            $epoch = wfTimestampNow();
            foreach ( $dateopts as $key ) {
                if ( $key == 'default' ) {
                    $formatted = $context->msg( 'datedefault' )->escaped();
                } else {
                    $formatted = htmlspecialchars( $lang->timeanddate( $epoch, false, $key ) );
                }
                $ret[$formatted] = $key;
            }
        }
        return $ret;
    }
 
    protected function getImageSizes( MessageLocalizer $l10n ) {
        $ret = [];
        $pixels = $l10n->msg( 'unit-pixel' )->text();
 
        foreach ( $this->options->get( MainConfigNames::ImageLimits ) as $index => $limits ) {
            // Note: A left-to-right marker (U+200E) is inserted, see T144386
            $display = "{$limits[0]}\u{200E}×{$limits[1]}$pixels";
            $ret[$display] = $index;
        }
 
        return $ret;
    }
 
    protected function getThumbSizes( MessageLocalizer $l10n ) {
        $ret = [];
        $pixels = $l10n->msg( 'unit-pixel' )->text();
 
        foreach ( $this->options->get( MainConfigNames::ThumbLimits ) as $index => $size ) {
            $display = $size . $pixels;
            $ret[$display] = $index;
        }
 
        return $ret;
    }
 
    protected function validateSignature( $signature, $alldata, HTMLForm $form ) {
        $sigValidation = $this->options->get( MainConfigNames::SignatureValidation );
        $maxSigChars = $this->options->get( MainConfigNames::MaxSigChars );
        if ( is_string( $signature ) && mb_strlen( $signature ) > $maxSigChars ) {
            return $form->msg( 'badsiglength' )->numParams( $maxSigChars )->escaped();
        }
 
        if ( $signature === null || $signature === '' ) {
            // Make sure leaving the field empty is valid, since that's used as the default (T288151).
            // Code using this preference in Parser::getUserSig() handles this case specially.
            return true;
        }
 
        // Remaining checks only apply to fancy signatures
        if ( !( isset( $alldata['fancysig'] ) && $alldata['fancysig'] ) ) {
            return true;
        }
 
        // HERE BE DRAGONS:
        //
        // If this value is already saved as the user's signature, treat it as valid, even if it
        // would be invalid to save now, and even if $wgSignatureValidation is set to 'disallow'.
        //
        // It can become invalid when we introduce new validation, or when the value just transcludes
        // some page containing the real signature and that page is edited (which we can't validate),
        // or when someone's username is changed.
        //
        // Otherwise it would be completely removed when the user opens their preferences page, which
        // would be very unfriendly.
        $user = $form->getUser();
        if (
            $signature === $this->userOptionsManager->getOption( $user, 'nickname' ) &&
            (bool)$alldata['fancysig'] === $this->userOptionsManager->getBoolOption( $user, 'fancysig' )
        ) {
            return true;
        }
 
        if ( $sigValidation === 'new' || $sigValidation === 'disallow' ) {
            // Validate everything
            $parserOpts = ParserOptions::newFromContext( $form->getContext() );
            $validator = $this->signatureValidatorFactory
                ->newSignatureValidator( $user, $form->getContext(), $parserOpts );
            $errors = $validator->validateSignature( $signature );
            if ( $errors ) {
                return $errors;
            }
        }
 
        // Quick check for mismatched HTML tags in the input.
        // Note that this is easily fooled by wikitext templates or bold/italic markup.
        // We're only keeping this until Parsoid is integrated and guaranteed to be available.
        if ( $this->parserFactory->getInstance()->validateSig( $signature ) === false ) {
            return $form->msg( 'badsig' )->escaped();
        }
 
        return true;
    }
 
    protected function cleanSignature( $signature, $alldata, HTMLForm $form ) {
        if ( isset( $alldata['fancysig'] ) && $alldata['fancysig'] ) {
            $signature = $this->parserFactory->getInstance()->cleanSig( $signature );
        } else {
            // When no fancy sig used, make sure ~{3,5} get removed.
            $signature = Parser::cleanSigInSig( $signature );
        }
 
        return $signature;
    }
 
    public function getForm(
        User $user,
        IContextSource $context,
        $formClass = PreferencesFormOOUI::class,
        array $remove = []
    ) {
        // We use ButtonWidgets in some of the getPreferences() functions
        $context->getOutput()->enableOOUI();
 
        // Note that the $user parameter of getFormDescriptor() is deprecated.
        $formDescriptor = $this->getFormDescriptor( $user, $context );
        if ( count( $remove ) ) {
            $removeKeys = array_fill_keys( $remove, true );
            $formDescriptor = array_diff_key( $formDescriptor, $removeKeys );
        }
 
        // Remove type=api preferences. They are not intended for rendering in the form.
        foreach ( $formDescriptor as $name => $info ) {
            if ( isset( $info['type'] ) && $info['type'] === 'api' ) {
                unset( $formDescriptor[$name] );
            }
        }
 
        $htmlForm = new $formClass( $formDescriptor, $context, 'prefs' );
 
        // This allows users to opt-in to hidden skins. While this should be discouraged and is not
        // discoverable, this allows users to still use hidden skins while preventing new users from
        // adopting unsupported skins. If no useskin=… parameter was provided, it will not show up
        // in the resulting URL.
        $htmlForm->setAction( $context->getTitle()->getLocalURL( [
            'useskin' => $context->getRequest()->getRawVal( 'useskin' )
        ] ) );
 
        $htmlForm->setModifiedUser( $user );
        $htmlForm->setOptionsEditable( $user->isAllowed( 'editmyoptions' ) );
        $htmlForm->setPrivateInfoEditable( $user->isAllowed( 'editmyprivateinfo' ) );
        $htmlForm->setId( 'mw-prefs-form' );
        $htmlForm->setAutocomplete( 'off' );
        $htmlForm->setSubmitTextMsg( 'saveprefs' );
        // Used message keys: 'accesskey-preferences-save', 'tooltip-preferences-save'
        $htmlForm->setSubmitTooltip( 'preferences-save' );
        $htmlForm->setSubmitID( 'prefcontrol' );
        $htmlForm->setSubmitCallback(
            function ( array $formData, PreferencesFormOOUI $form ) use ( $formDescriptor ) {
                return $this->submitForm( $formData, $form, $formDescriptor );
            }
        );
 
        return $htmlForm;
    }
 
    protected function saveFormData( $formData, PreferencesFormOOUI $form, array $formDescriptor ) {
        $user = $form->getModifiedUser();
        $hiddenPrefs = $this->options->get( MainConfigNames::HiddenPrefs );
        $result = true;
 
        if ( !$user->isAllowedAny( 'editmyprivateinfo', 'editmyoptions' ) ) {
            return Status::newFatal( 'mypreferencesprotected' );
        }
 
        // Filter input
        $this->applyFilters( $formData, $formDescriptor, 'filterFromForm' );
 
        // Fortunately, the realname field is MUCH simpler
        // (not really "private", but still shouldn't be edited without permission)
 
        if ( !in_array( 'realname', $hiddenPrefs )
            && $user->isAllowed( 'editmyprivateinfo' )
            && array_key_exists( 'realname', $formData )
        ) {
            $realName = $formData['realname'];
            $user->setRealName( $realName );
        }
 
        if ( $user->isAllowed( 'editmyoptions' ) ) {
            $oldUserOptions = $this->userOptionsManager->getOptions( $user );
 
            foreach ( $this->getSaveBlacklist() as $b ) {
                unset( $formData[$b] );
            }
 
            // If users have saved a value for a preference which has subsequently been disabled
            // via $wgHiddenPrefs, we don't want to destroy that setting in case the preference
            // is subsequently re-enabled
            foreach ( $hiddenPrefs as $pref ) {
                // If the user has not set a non-default value here, the default will be returned
                // and subsequently discarded
                $formData[$pref] = $this->userOptionsManager->getOption( $user, $pref, null, true );
            }
 
            // If the user changed the rclimit preference, also change the rcfilters-rclimit preference
            if (
                isset( $formData['rclimit'] ) &&
                intval( $formData[ 'rclimit' ] ) !== $this->userOptionsManager->getIntOption( $user, 'rclimit' )
            ) {
                $formData['rcfilters-limit'] = $formData['rclimit'];
            }
 
            // Keep old preferences from interfering due to back-compat code, etc.
            $this->userOptionsManager->resetOptions( $user, $form->getContext(), 'unused' );
 
            foreach ( $formData as $key => $value ) {
                $this->userOptionsManager->setOption( $user, $key, $value );
            }
 
            $this->hookRunner->onPreferencesFormPreSave(
                $formData, $form, $user, $result, $oldUserOptions );
        }
 
        $user->saveSettings();
 
        return $result;
    }
 
    protected function applyFilters( array &$preferences, array $formDescriptor, $verb ) {
        foreach ( $formDescriptor as $preference => $desc ) {
            if ( !isset( $desc['filter'] ) || !isset( $preferences[$preference] ) ) {
                continue;
            }
            $filterDesc = $desc['filter'];
            if ( $filterDesc instanceof Filter ) {
                $filter = $filterDesc;
            } elseif ( class_exists( $filterDesc ) ) {
                $filter = new $filterDesc();
            } elseif ( is_callable( $filterDesc ) ) {
                $filter = $filterDesc();
            } else {
                throw new UnexpectedValueException(
                    "Unrecognized filter type for preference '$preference'"
                );
            }
            $preferences[$preference] = $filter->$verb( $preferences[$preference] );
        }
    }
 
    protected function submitForm(
        array $formData,
        PreferencesFormOOUI $form,
        array $formDescriptor
    ) {
        $res = $this->saveFormData( $formData, $form, $formDescriptor );
 
        if ( $res === true ) {
            $context = $form->getContext();
            $urlOptions = [];
 
            $urlOptions += $form->getExtraSuccessRedirectParameters();
 
            $url = $form->getTitle()->getFullURL( $urlOptions );
 
            // Set session data for the success message
            $context->getRequest()->getSession()->set( 'specialPreferencesSaveSuccess', 1 );
 
            $context->getOutput()->redirect( $url );
        }
 
        return ( $res === true ? Status::newGood() : $res );
    }
}