DefaultPreferencesFactory.php

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<?php
namespace MediaWiki\Preferences;
 
use Config;
use DateTime;
use DateTimeZone;
use Exception;
use Hooks;
use Html;
use HTMLForm;
use HTMLFormField;
use IContextSource;
use Language;
use LanguageCode;
use LanguageConverter;
use MediaWiki\Auth\AuthManager;
use MediaWiki\Auth\PasswordAuthenticationRequest;
use MediaWiki\Linker\LinkRenderer;
use MediaWiki\MediaWikiServices;
use MessageLocalizer;
use MWException;
use MWNamespace;
use MWTimestamp;
use OutputPage;
use Parser;
use ParserOptions;
use PreferencesFormLegacy;
use Psr\Log\LoggerAwareTrait;
use Psr\Log\NullLogger;
use Skin;
use SpecialPage;
use Status;
use Title;
use UnexpectedValueException;
use User;
use UserGroupMembership;
use Xml;
 
class DefaultPreferencesFactory implements PreferencesFactory {
    use LoggerAwareTrait;
 
    protected $config;
 
    protected $contLang;
 
    protected $authManager;
 
    protected $linkRenderer;
 
    public function __construct(
        Config $config,
        Language $contLang,
        AuthManager $authManager,
        LinkRenderer $linkRenderer
    ) {
        $this->config = $config;
        $this->contLang = $contLang;
        $this->authManager = $authManager;
        $this->linkRenderer = $linkRenderer;
        $this->logger = new NullLogger();
    }
 
    public function getSaveBlacklist() {
        return [
            'realname',
            'emailaddress',
        ];
    }
 
    public function getFormDescriptor( User $user, IContextSource $context ) {
        $preferences = [];
 
        OutputPage::setupOOUI(
            strtolower( $context->getSkin()->getSkinName() ),
            $context->getLanguage()->getDir()
        );
 
        $canIPUseHTTPS = wfCanIPUseHTTPS( $context->getRequest()->getIP() );
        $this->profilePreferences( $user, $context, $preferences, $canIPUseHTTPS );
        $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( $preferences );
 
        Hooks::run( 'GetPreferences', [ $user, &$preferences ] );
 
        $this->loadPreferenceValues( $user, $context, $preferences );
        $this->logger->debug( "Created form descriptor for user '{$user->getName()}'" );
        return $preferences;
    }
 
    private function loadPreferenceValues(
        User $user, IContextSource $context, &$defaultPreferences
    ) {
        # # Remove preferences that wikis don't want to use
        foreach ( $this->config->get( 'HiddenPrefs' ) as $pref ) {
            if ( isset( $defaultPreferences[$pref] ) ) {
                unset( $defaultPreferences[$pref] );
            }
        }
 
        # # Make sure that form fields have their parent set. See T43337.
        $dummyForm = new HTMLForm( [], $context );
 
        $disable = !$user->isAllowed( 'editmyoptions' );
 
        $defaultOptions = User::getDefaultOptions();
        $userOptions = $user->getOptions();
        $this->applyFilters( $userOptions, $defaultPreferences, 'filterForForm' );
        # # Prod in defaults from the user
        foreach ( $defaultPreferences as $name => &$info ) {
            $prefFromUser = $this->getOptionFromUser( $name, $info, $userOptions );
            if ( $disable && !in_array( $name, $this->getSaveBlacklist() ) ) {
                $info['disabled'] = 'disabled';
            }
            $field = HTMLForm::loadInputFromParameters( $name, $info, $dummyForm ); // For validation
            $globalDefault = $defaultOptions[$name] ?? null;
 
            // If it validates, set it as the default
            if ( isset( $info['default'] ) ) {
                // Already set, no problem
                continue;
            } elseif ( !is_null( $prefFromUser ) && // Make sure we're not just pulling nothing
                    $field->validate( $prefFromUser, $user->getOptions() ) === true ) {
                $info['default'] = $prefFromUser;
            } elseif ( $field->validate( $globalDefault, $user->getOptions() ) === true ) {
                $info['default'] = $globalDefault;
            } else {
                throw new MWException( "Global default '$globalDefault' is invalid for field $name" );
            }
        }
 
        return $defaultPreferences;
    }
 
    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'] );
            $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, $canIPUseHTTPS
    ) {
        // retrieving user name for GENDER and misc.
        $userName = $user->getName();
 
        # # User info #####################################
        // 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
        $userEffectiveGroups = $user->getEffectiveGroups();
        $userGroupMemberships = $user->getGroupMemberships();
        $userGroups = $userMembers = $userTempGroups = $userTempMembers = [];
        foreach ( $userEffectiveGroups as $ueg ) {
            if ( $ueg == '*' ) {
                // Skip the default * group, seems useless here
                continue;
            }
 
            $groupStringOrObject = $userGroupMemberships[$ueg] ?? $ueg;
 
            $userG = UserGroupMembership::getLink( $groupStringOrObject, $context, 'html' );
            $userM = UserGroupMembership::getLink( $groupStringOrObject, $context, 'html',
                $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 );
 
        $defaultPreferences['usergroups'] = [
            'type' => 'info',
            'label' => $context->msg( 'prefs-memberingroups' )->numParams(
                count( $userGroups ) )->params( $userName )->parse(),
            'default' => $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',
                'section' => 'personal/info',
            ];
        }
        // Only show prefershttps if secure login is turned on
        if ( $this->config->get( 'SecureLogin' ) && $canIPUseHTTPS ) {
            $defaultPreferences['prefershttps'] = [
                'type' => 'toggle',
                'label-message' => 'tog-prefershttps',
                'help-message' => 'prefs-help-prefershttps',
                'section' => 'personal/info'
            ];
        }
 
        $languages = Language::fetchLanguageNames( null, 'mwfile' );
        $languageCode = $this->config->get( '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',
        ];
 
        $defaultPreferences['gender'] = [
            'type' => 'radio',
            'section' => 'personal/i18n',
            'options' => [
                $context->msg( 'parentheses' )
                    ->params( $context->msg( 'gender-unknown' )->plain() )
                    ->escaped() => '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 ( !$this->config->get( 'DisableLangConversion' ) ) {
            foreach ( LanguageConverter::$languagesWithVariants as $langCode ) {
                if ( $langCode == $this->contLang->getCode() ) {
                    if ( !$this->contLang->hasVariants() ) {
                        continue;
                    }
 
                    $variants = $this->contLang->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',
                    ];
                }
            }
        }
 
        // Stuff from Language::getExtraUserToggles()
        // FIXME is this dead code? $extraUserToggles doesn't seem to be defined for any language
        $toggles = $this->contLang->getExtraUserToggles();
 
        foreach ( $toggles as $toggle ) {
            $defaultPreferences[$toggle] = [
                'type' => 'toggle',
                'section' => 'personal/i18n',
                'label-message' => "tog-$toggle",
            ];
        }
 
        // show a preview of the old signature first
        $oldsigWikiText = MediaWikiServices::getInstance()->getParser()->preSaveTransform(
            '~~~',
            $context->getTitle(),
            $user,
            ParserOptions::newFromContext( $context )
        );
        $oldsigHTML = Parser::stripOuterParagraph(
            $context->getOutput()->parseAsContent( $oldsigWikiText )
        );
        $defaultPreferences['oldsig'] = [
            'type' => 'info',
            'raw' => true,
            'label-message' => 'tog-oldsig',
            'default' => $oldsigHTML,
            'section' => 'personal/signature',
        ];
        $defaultPreferences['nickname'] = [
            'type' => $this->authManager->allowsPropertyChange( 'nickname' ) ? 'text' : 'info',
            'maxlength' => $this->config->get( '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 stuff
 
        if ( $this->config->get( 'EnableEmail' ) ) {
            if ( $canViewPrivateInfo ) {
                $helpMessages[] = $this->config->get( 'EmailConfirmToEdit' )
                        ? 'prefs-help-email-required'
                        : 'prefs-help-email';
 
                if ( $this->config->get( '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->config->get( 'EmailAuthentication' ) ) {
                $emailauthenticationclass = 'mw-email-not-authenticated';
                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 />';
                        $disableEmailPrefs = false;
                        $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->config->get( '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,
                ];
 
                $defaultPreferences['ccmeonemails'] = [
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-ccmeonemails',
                    'disabled' => $disableEmailPrefs,
                ];
 
                if ( $this->config->get( 'EnableUserEmailBlacklist' ) ) {
                    $defaultPreferences['email-blacklist'] = [
                        'type' => 'usersmultiselect',
                        'label-message' => 'email-blacklist-label',
                        'section' => 'personal/email',
                        'disabled' => $disableEmailPrefs,
                        'filter' => MultiUsernameFilter::class,
                    ];
                }
            }
 
            if ( $this->config->get( 'EnotifWatchlist' ) ) {
                $defaultPreferences['enotifwatchlistpages'] = [
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-enotifwatchlistpages',
                    'disabled' => $disableEmailPrefs,
                ];
            }
            if ( $this->config->get( 'EnotifUserTalk' ) ) {
                $defaultPreferences['enotifusertalkpages'] = [
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-enotifusertalkpages',
                    'disabled' => $disableEmailPrefs,
                ];
            }
            if ( $this->config->get( 'EnotifUserTalk' ) || $this->config->get( 'EnotifWatchlist' ) ) {
                if ( $this->config->get( 'EnotifMinorEdits' ) ) {
                    $defaultPreferences['enotifminoredits'] = [
                        'type' => 'toggle',
                        'section' => 'personal/email',
                        'label-message' => 'tog-enotifminoredits',
                        'disabled' => $disableEmailPrefs,
                    ];
                }
 
                if ( $this->config->get( 'EnotifRevealEditorAddress' ) ) {
                    $defaultPreferences['enotifrevealaddr'] = [
                        'type' => 'toggle',
                        'section' => 'personal/email',
                        'label-message' => 'tog-enotifrevealaddr',
                        'disabled' => $disableEmailPrefs,
                    ];
                }
            }
        }
    }
 
    protected function skinPreferences( User $user, IContextSource $context, &$defaultPreferences ) {
        # # Skin #####################################
 
        // Skin selector, if there is at least one valid skin
        $skinOptions = $this->generateSkinOptions( $user, $context );
        if ( $skinOptions ) {
            $defaultPreferences['skin'] = [
                'type' => 'radio',
                'options' => $skinOptions,
                'section' => 'rendering/skin',
            ];
        }
 
        $allowUserCss = $this->config->get( 'AllowUserCss' );
        $allowUserJs = $this->config->get( 'AllowUserJs' );
        # Create links to user CSS/JS pages for all skins
        # This code is basically copied from generateSkinOptions().  It'd
        # be nice to somehow merge this back in there to avoid redundancy.
        if ( $allowUserCss || $allowUserJs ) {
            $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 ) {
        # # Files #####################################
        $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, IContextSource $context, &$defaultPreferences ) {
        # # Date and time #####################################
        $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',
        ];
 
        // Grab existing pref.
        $tzOffset = $user->getOption( 'timecorrection' );
        $tz = explode( '|', $tzOffset, 3 );
 
        $tzOptions = $this->getTimezoneOptions( $context );
 
        $tzSetting = $tzOffset;
        if ( count( $tz ) > 1 && $tz[0] == 'ZoneInfo' &&
            !in_array( $tzOffset, HTMLFormField::flattenOptions( $tzOptions ) )
        ) {
            // Timezone offset can vary with DST
            try {
                $userTZ = new DateTimeZone( $tz[2] );
                $minDiff = floor( $userTZ->getOffset( new DateTime( 'now' ) ) / 60 );
                $tzSetting = "ZoneInfo|$minDiff|{$tz[2]}";
            } catch ( Exception $e ) {
                // User has an invalid time zone set. Fall back to just using the offset
                $tz[0] = 'Offset';
            }
        }
        if ( count( $tz ) > 1 && $tz[0] == 'Offset' ) {
            $minDiff = $tz[1];
            $tzSetting = sprintf( '%+03d:%02d', floor( $minDiff / 60 ), abs( $minDiff ) % 60 );
        }
 
        $defaultPreferences['timecorrection'] = [
            'class' => \HTMLSelectOrOtherField::class,
            'label-message' => 'timezonelegend',
            'options' => $tzOptions,
            'default' => $tzSetting,
            'size' => 20,
            'section' => 'rendering/timeoffset',
            'id' => 'wpTimeCorrection',
            'filter' => TimezoneFilter::class,
            'placeholder-message' => 'timezone-useoffset-placeholder',
        ];
    }
 
    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',
        ];
 
        # # Page Rendering ##############################
        if ( $this->config->get( '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',
            ];
        }
 
        $stubThresholdValues = [ 50, 100, 500, 1000, 2000, 5000, 10000 ];
        $stubThresholdOptions = [ $l10n->msg( 'stub-threshold-disabled' )->text() => 0 ];
        foreach ( $stubThresholdValues as $value ) {
            $stubThresholdOptions[$l10n->msg( 'size-bytes', $value )->text()] = $value;
        }
 
        $defaultPreferences['stubthreshold'] = [
            'type' => 'select',
            'section' => 'rendering/advancedrendering',
            'options' => $stubThresholdOptions,
            // This is not a raw HTML message; label-raw is needed for the manual <a></a>
            'label-raw' => $l10n->msg( 'stub-threshold' )->rawParams(
                '<a class="stub">' .
                $l10n->msg( 'stub-threshold-sample-link' )->parse() .
                '</a>' )->parse(),
        ];
 
        $defaultPreferences['showhiddencats'] = [
            'type' => 'toggle',
            'section' => 'rendering/advancedrendering',
            'label-message' => 'tog-showhiddencats'
        ];
 
        $defaultPreferences['numberheadings'] = [
            'type' => 'toggle',
            'section' => 'rendering/advancedrendering',
            'label-message' => 'tog-numberheadings',
        ];
 
        if ( $user->isAllowed( 'rollback' ) ) {
            $defaultPreferences['showrollbackconfirmation'] = [
                'type' => 'toggle',
                'section' => 'rendering/advancedrendering',
                'label-message' => 'tog-showrollbackconfirmation',
            ];
        }
    }
 
    protected function editingPreferences( User $user, MessageLocalizer $l10n, &$defaultPreferences ) {
        # # Editing #####################################
        $defaultPreferences['editsectiononrightclick'] = [
            'type' => 'toggle',
            'section' => 'editing/advancedediting',
            'label-message' => 'tog-editsectiononrightclick',
        ];
        $defaultPreferences['editondblclick'] = [
            'type' => 'toggle',
            'section' => 'editing/advancedediting',
            'label-message' => 'tog-editondblclick',
        ];
 
        if ( $this->config->get( '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->config->get( 'RCMaxAge' );
        # # RecentChanges #####################################
        $defaultPreferences['rcdays'] = [
            'type' => 'float',
            'label-message' => 'recentchangesdays',
            'section' => 'rc/displayrc',
            'min' => 1 / 24,
            'max' => ceil( $rcMaxAge / ( 3600 * 24 ) ),
            'help' => $l10n->msg( 'recentchangesdays-max' )->numParams(
                ceil( $rcMaxAge / ( 3600 * 24 ) ) )->escaped()
        ];
        $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['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->config->get( '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->config->get( '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->config->get( 'RCMaxAge' ) / ( 3600 * 24 ) );
 
        # # Watchlist #####################################
        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' => $context->msg( 'prefs-watchlist-days-max' )->numParams(
                $watchlistdaysMax )->escaped(),
            'label-message' => 'prefs-watchlist-days',
        ];
        $defaultPreferences['wllimit'] = [
            'type' => 'int',
            'min' => 1,
            'max' => 1000,
            'label-message' => 'prefs-watchlist-edits',
            'help' => $context->msg( 'prefs-watchlist-edits-max' )->escaped(),
            '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(
            $this->config,
            $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->config->get( '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',
            'delete' => 'watchdeletion'
        ];
 
        // Kinda hacky
        if ( $user->isAllowed( 'createpage' ) || $user->isAllowed( 'createtalk' ) ) {
            $watchTypes['read'] = 'watchcreations';
        }
 
        if ( $user->isAllowed( 'rollback' ) ) {
            $watchTypes['rollback'] = 'watchrollback';
        }
 
        if ( $user->isAllowed( 'upload' ) ) {
            $watchTypes['upload'] = 'watchuploads';
        }
 
        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( &$defaultPreferences ) {
        foreach ( MWNamespace::getValidNamespaces() as $n ) {
            $defaultPreferences['searchNs' . $n] = [
                'type' => 'api',
            ];
        }
    }
 
    protected function generateSkinOptions( User $user, IContextSource $context ) {
        $ret = [];
 
        $mptitle = Title::newMainPage();
        $previewtext = $context->msg( 'skin-preview' )->escaped();
 
        # Only show skins that aren't disabled in $wgSkipSkins
        $validSkinNames = Skin::getAllowedSkins();
 
        foreach ( $validSkinNames as $skinkey => &$skinname ) {
            $msg = $context->msg( "skinname-{$skinkey}" );
            if ( $msg->exists() ) {
                $skinname = htmlspecialchars( $msg->text() );
            }
        }
 
        $defaultSkin = $this->config->get( 'DefaultSkin' );
        $allowUserCss = $this->config->get( 'AllowUserCss' );
        $allowUserJs = $this->config->get( 'AllowUserJs' );
 
        # 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 ( $defaultSkin ) {
            # Display the default first in the list by comparing it as lesser than any other.
            if ( strcasecmp( $a, $defaultSkin ) === 0 ) {
                return -1;
            }
            if ( strcasecmp( $b, $defaultSkin ) === 0 ) {
                return 1;
            }
            return strcasecmp( $a, $b );
        } );
 
        $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 preview link
            $mplink = htmlspecialchars( $mptitle->getLocalURL( [ 'useskin' => $skinkey ] ) );
            $linkTools[] = "<a target='_blank' href=\"$mplink\">$previewtext</a>";
 
            # Create links to user CSS/JS pages
            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->config->get( '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->config->get( 'ThumbLimits' ) as $index => $size ) {
            $display = $size . $pixels;
            $ret[$display] = $index;
        }
 
        return $ret;
    }
 
    protected function validateSignature( $signature, $alldata, HTMLForm $form ) {
        $maxSigChars = $this->config->get( 'MaxSigChars' );
        if ( mb_strlen( $signature ) > $maxSigChars ) {
            return Xml::element( 'span', [ 'class' => 'error' ],
                $form->msg( 'badsiglength' )->numParams( $maxSigChars )->text() );
        } elseif ( isset( $alldata['fancysig'] ) &&
                $alldata['fancysig'] &&
                MediaWikiServices::getInstance()->getParser()->validateSig( $signature ) === false
        ) {
            return Xml::element(
                'span',
                [ 'class' => 'error' ],
                $form->msg( 'badsig' )->text()
            );
        } else {
            return true;
        }
    }
 
    protected function cleanSignature( $signature, $alldata, HTMLForm $form ) {
        $parser = MediaWikiServices::getInstance()->getParser();
        if ( isset( $alldata['fancysig'] ) && $alldata['fancysig'] ) {
            $signature = $parser->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 = PreferencesFormLegacy::class,
        array $remove = []
    ) {
        // We use ButtonWidgets in some of the getPreferences() functions
        $context->getOutput()->enableOOUI();
 
        $formDescriptor = $this->getFormDescriptor( $user, $context );
        if ( count( $remove ) ) {
            $removeKeys = array_flip( $remove );
            $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' );
 
        $htmlForm->setModifiedUser( $user );
        $htmlForm->setId( 'mw-prefs-form' );
        $htmlForm->setAutocomplete( 'off' );
        $htmlForm->setSubmitText( $context->msg( 'saveprefs' )->text() );
        # Used message keys: 'accesskey-preferences-save', 'tooltip-preferences-save'
        $htmlForm->setSubmitTooltip( 'preferences-save' );
        $htmlForm->setSubmitID( 'prefcontrol' );
        $htmlForm->setSubmitCallback(
            function ( array $formData, HTMLForm $form ) use ( $formDescriptor ) {
                return $this->submitForm( $formData, $form, $formDescriptor );
            }
        );
 
        return $htmlForm;
    }
 
    protected function getTimezoneOptions( IContextSource $context ) {
        $opt = [];
 
        $localTZoffset = $this->config->get( 'LocalTZoffset' );
        $timeZoneList = $this->getTimeZoneList( $context->getLanguage() );
 
        $timestamp = MWTimestamp::getLocalInstance();
        // Check that the LocalTZoffset is the same as the local time zone offset
        if ( $localTZoffset == $timestamp->format( 'Z' ) / 60 ) {
            $timezoneName = $timestamp->getTimezone()->getName();
            // Localize timezone
            if ( isset( $timeZoneList[$timezoneName] ) ) {
                $timezoneName = $timeZoneList[$timezoneName]['name'];
            }
            $server_tz_msg = $context->msg(
                'timezoneuseserverdefault',
                $timezoneName
            )->text();
        } else {
            $tzstring = sprintf(
                '%+03d:%02d',
                floor( $localTZoffset / 60 ),
                abs( $localTZoffset ) % 60
            );
            $server_tz_msg = $context->msg( 'timezoneuseserverdefault', $tzstring )->text();
        }
        $opt[$server_tz_msg] = "System|$localTZoffset";
        $opt[$context->msg( 'timezoneuseoffset' )->text()] = 'other';
        $opt[$context->msg( 'guesstimezone' )->text()] = 'guess';
 
        foreach ( $timeZoneList as $timeZoneInfo ) {
            $region = $timeZoneInfo['region'];
            if ( !isset( $opt[$region] ) ) {
                $opt[$region] = [];
            }
            $opt[$region][$timeZoneInfo['name']] = $timeZoneInfo['timecorrection'];
        }
        return $opt;
    }
 
    protected function saveFormData( $formData, HTMLForm $form, array $formDescriptor ) {
        $user = $form->getModifiedUser();
        $hiddenPrefs = $this->config->get( '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 = $user->getOptions();
 
            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] = $user->getOption( $pref, null, true );
            }
 
            // If the user changed the rclimit preference, also change the rcfilters-rclimit preference
            if (
                isset( $formData['rclimit'] ) &&
                intval( $formData[ 'rclimit' ] ) !== $user->getIntOption( 'rclimit' )
            ) {
                $formData['rcfilters-limit'] = $formData['rclimit'];
            }
 
            // Keep old preferences from interfering due to back-compat code, etc.
            $user->resetOptions( 'unused', $form->getContext() );
 
            foreach ( $formData as $key => $value ) {
                $user->setOption( $key, $value );
            }
 
            Hooks::run(
                'PreferencesFormPreSave',
                [ $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, HTMLForm $form, array $formDescriptor ) {
        $res = $this->saveFormData( $formData, $form, $formDescriptor );
 
        if ( $res === true ) {
            $context = $form->getContext();
            $urlOptions = [];
 
            if ( $res === 'eauth' ) {
                $urlOptions['eauth'] = 1;
            }
 
            $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 );
    }
 
    protected function getTimeZoneList( Language $language ) {
        $identifiers = DateTimeZone::listIdentifiers();
        if ( $identifiers === false ) {
            return [];
        }
        sort( $identifiers );
 
        $tzRegions = [
            'Africa' => wfMessage( 'timezoneregion-africa' )->inLanguage( $language )->text(),
            'America' => wfMessage( 'timezoneregion-america' )->inLanguage( $language )->text(),
            'Antarctica' => wfMessage( 'timezoneregion-antarctica' )->inLanguage( $language )->text(),
            'Arctic' => wfMessage( 'timezoneregion-arctic' )->inLanguage( $language )->text(),
            'Asia' => wfMessage( 'timezoneregion-asia' )->inLanguage( $language )->text(),
            'Atlantic' => wfMessage( 'timezoneregion-atlantic' )->inLanguage( $language )->text(),
            'Australia' => wfMessage( 'timezoneregion-australia' )->inLanguage( $language )->text(),
            'Europe' => wfMessage( 'timezoneregion-europe' )->inLanguage( $language )->text(),
            'Indian' => wfMessage( 'timezoneregion-indian' )->inLanguage( $language )->text(),
            'Pacific' => wfMessage( 'timezoneregion-pacific' )->inLanguage( $language )->text(),
        ];
        asort( $tzRegions );
 
        $timeZoneList = [];
 
        $now = new DateTime();
 
        foreach ( $identifiers as $identifier ) {
            $parts = explode( '/', $identifier, 2 );
 
            // DateTimeZone::listIdentifiers() returns a number of
            // backwards-compatibility entries. This filters them out of the
            // list presented to the user.
            if ( count( $parts ) !== 2 || !array_key_exists( $parts[0], $tzRegions ) ) {
                continue;
            }
 
            // Localize region
            $parts[0] = $tzRegions[$parts[0]];
 
            $dateTimeZone = new DateTimeZone( $identifier );
            $minDiff = floor( $dateTimeZone->getOffset( $now ) / 60 );
 
            $display = str_replace( '_', ' ', $parts[0] . '/' . $parts[1] );
            $value = "ZoneInfo|$minDiff|$identifier";
 
            $timeZoneList[$identifier] = [
                'name' => $display,
                'timecorrection' => $value,
                'region' => $parts[0],
            ];
        }
 
        return $timeZoneList;
    }
}