/**
 * Global Constants
 * Belongs to LocalCDN (since 2020-02-26)
 * (Origin: Decentraleyes)
 *
 * @author      Thomas Rientjes
 * @since       2017-10-27
 *
 * @author      nobody
 * @since       2020-02-26
 *
 * @license     MPL 2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/.
 */

'use strict';

/**
 * Constants
 */
const Address = {
    'ANY': '*://*/*',
    'ANY_PATH': '/*',
    'ANY_PROTOCOL': '*://',
    'CHROME': 'chrome:',
    'CHROME_EXTENSION': 'chrome-extension:',
    'LOCALCDN': 'localcdn.org',
    'EXAMPLE': 'example.org',
    'HTTP': 'http:',
    'HTTPS': 'https:',
    'RESOURCE_PATH': '/resources',
    'ROOT_PATH': '/',
    'WWW_PREFIX': 'www.'
};

const Environment = {
    'STABLE': 'stable',
    'STAGING': 'staging'
};

const Header = {
    'COOKIE': 'Cookie',
    'ORIGIN': 'Origin',
    'REFERER': 'Referer'
};

const MessageResponse = {
    'ASYNCHRONOUS': true,
    'SYNCHRONOUS': false
};

const Resource = {
    'MAPPING_EXPRESSION': /\.map$/i,
    'VERSION_EXPRESSION': /(?:\d{1,2}\.){1,3}\d{1,2}(?:-\d)?|latest/,
    'SINGLE_NUMBER_EXPRESSION': /^\D+\d\D+$/,
    'MATHJAX': /\/\w.*(?:\d{1,2}\.){1,3}\d{1,2}(?:-\d)?\/|\/(mathjax\/)?latest\//,
    'VERSION_PLACEHOLDER': '{version}'
};

const BadgeSetting = {
    'TYPE': 'default',
    'COUNTER_PREVIEW_BADGE': 'counter-preview-badge',
    'HTML_ICON_BADGE_PREVIEW': 'icon-badge-preview',
    'PRE_BADGED_BACKGROUND_COLOR': 'pre-badged-background-color',
    'BADGED_BACKGROUND_COLOR': 'badged-background-color',
    'PRE_BADGED_TEXT_COLOR': 'pre-badged-text-color',
    'BADGED_TEXT_COLOR': 'badged-text-color',
    'RESTORE_BACKGROUND_COLOR': 'restore-background-color',
    'RESTORE_TEXT_COLOR': 'restore-text-color',
    'HEX_BACKGROUND_COLOR': '#4A826C',
    'HEX_TEXT_COLOR': '#FFFFFF',
};

const BadgeSettingHTMLFilter = {
    'TYPE': 'html-filter',
    'COUNTER_PREVIEW_BADGE': 'html-counter-preview-badge',
    'HTML_ICON_BADGE_PREVIEW': 'html-icon-badge-preview',
    'PRE_BADGED_BACKGROUND_COLOR': 'html-pre-badged-background-color',
    'BADGED_BACKGROUND_COLOR': 'html-badged-background-color',
    'PRE_BADGED_TEXT_COLOR': 'html-pre-badged-text-color',
    'BADGED_TEXT_COLOR': 'html-badged-text-color',
    'RESTORE_BACKGROUND_COLOR': 'html-restore-background-color',
    'RESTORE_TEXT_COLOR': 'html-restore-text-color',
    'HEX_BACKGROUND_COLOR': '#FF0000',
    'HEX_TEXT_COLOR': '#FFFFFF',
};

const BadgeSettingMissingResource = {
    'TYPE': 'missing-resource',
    'COUNTER_PREVIEW_BADGE': 'missing-counter-preview-badge',
    'HTML_ICON_BADGE_PREVIEW': 'missing-icon-badge-preview',
    'PRE_BADGED_BACKGROUND_COLOR': 'missing-pre-badged-background-color',
    'BADGED_BACKGROUND_COLOR': 'missing-badged-background-color',
    'PRE_BADGED_TEXT_COLOR': 'missing-pre-badged-text-color',
    'BADGED_TEXT_COLOR': 'missing-badged-text-color',
    'RESTORE_BACKGROUND_COLOR': 'missing-restore-background-color',
    'RESTORE_TEXT_COLOR': 'missing-restore-text-color',
    'HEX_BACKGROUND_COLOR': '#0000FF',
    'HEX_TEXT_COLOR': '#FFFFFF',
};

const Setting = {
    'AMOUNT_INJECTED': 'amountInjected',
    'BLOCK_MISSING': 'blockMissing',
    'DISABLE_PREFETCH': 'disablePrefetch',
    'ENFORCE_STAGING': 'enforceStaging',
    'SHOW_ICON_BADGE': 'showIconBadge',
    'UPDATE_NOTIFICATION': 'updateNotification',
    'STRIP_METADATA': 'stripMetadata',
    'LAST_MAPPING_UPDATE': 'lastMappingUpdate',
    'ALLOWLISTED_DOMAINS': 'allowlistedDomains',
    'XHR_TEST_DOMAIN': 'xhrTestDomain',
    'LOGGING': 'enableLogging',
    'DOMAINS_MANIPULATE_DOM': 'domainsManipulateDOM',
    'NEGATE_HTML_FILTER_LIST': 'negateHtmlFilterList',
    'BLOCK_GOOGLE_FONTS': 'blockGoogleFonts',
    'SELECTED_ICON': 'selectedIcon',
    'INTERNAL_STATISTICS': 'internalStatistics',
    'INTERNAL_STATISTICS_DATA': 'internalStatisticsData',
    'DEFAULT_RANGE_STATISTIC': 'defaultRangeStatistic',
    'ALLOWED_DOMAINS_GOOGLE_FONTS': 'allowedDomainsGoogleFonts',
    'STORAGE_TYPE': 'storageType',
    'BADGE_DEFAULT_BACKGROUND_COLOR': 'badgeDefaultBackgroundColor',
    'BADGE_DEFAULT_TEXT_COLOR': 'badgeDefaultTextColor',
    'BADGE_HTML_FILTER_BACKGROUND_COLOR': 'badgeHTMLFilterBackgroundColor',
    'BADGE_HTML_FILTER_TEXT_COLOR': 'badgeHTMLfilterTextColor',
    'BADGE_MISSING_RESOURCE_BACKGROUND_COLOR': 'badgeMissingResourceBackgroundColor',
    'BADGE_MISSING_RESOURCE_TEXT_COLOR': 'badgeMissingResourceTextColor',
    'HIDE_DONATION_BUTTON': 'hideDonationButton',
    'CHANGE_BADGE_COLOR_MISSING_RESOURCES': 'changeBadgeColorMissingResources',
};

const SettingDefaults = {
    [Setting.ALLOWED_DOMAINS_GOOGLE_FONTS]: {},
    [Setting.AMOUNT_INJECTED]: 0,
    [Setting.BLOCK_GOOGLE_FONTS]: true,
    [Setting.BLOCK_MISSING]: false,
    [Setting.DISABLE_PREFETCH]: true,
    [Setting.DOMAINS_MANIPULATE_DOM]: {},
    [Setting.LOGGING]: false,
    [Setting.ENFORCE_STAGING]: false,
    [Setting.UPDATE_NOTIFICATION]: 0,
    [Setting.INTERNAL_STATISTICS]: false,
    [Setting.INTERNAL_STATISTICS_DATA]: {},
    [Setting.DEFAULT_RANGE_STATISTIC]: 'week',
    [Setting.LAST_MAPPING_UPDATE]: '2020-01-01',
    [Setting.NEGATE_HTML_FILTER_LIST]: false,
    [Setting.SELECTED_ICON]: 'Default',
    [Setting.SHOW_ICON_BADGE]: true,
    [Setting.STORAGE_TYPE]: 'local',
    [Setting.STRIP_METADATA]: true,
    [Setting.ALLOWLISTED_DOMAINS]: {},
    [Setting.XHR_TEST_DOMAIN]: Address.LOCALCDN,
    [Setting.BADGE_DEFAULT_BACKGROUND_COLOR]: BadgeSetting.HEX_BACKGROUND_COLOR,
    [Setting.BADGE_DEFAULT_TEXT_COLOR]: BadgeSetting.HEX_TEXT_COLOR,
    [Setting.BADGE_HTML_FILTER_BACKGROUND_COLOR]: BadgeSettingHTMLFilter.HEX_BACKGROUND_COLOR,
    [Setting.BADGE_HTML_FILTER_TEXT_COLOR]: BadgeSettingHTMLFilter.HEX_TEXT_COLOR,
    [Setting.BADGE_MISSING_RESOURCE_BACKGROUND_COLOR]: BadgeSettingMissingResource.HEX_BACKGROUND_COLOR,
    [Setting.BADGE_MISSING_RESOURCE_TEXT_COLOR]: BadgeSettingMissingResource.HEX_TEXT_COLOR,
    [Setting.HIDE_DONATION_BUTTON]: false,
    [Setting.CHANGE_BADGE_COLOR_MISSING_RESOURCES]: false,
};

const WebRequest = {
    'GET': 'GET',
    'BLOCKING': 'blocking',
    'HEADERS': 'requestHeaders',
    'RESPONSE_HEADERS': 'responseHeaders',
    'EXTRA_HEADERS': 'extraHeaders'
};

const WebRequestType = {
    'MAIN_FRAME': 'main_frame',
    'SUB_FRAME': 'sub_frame',
    'XHR': 'xmlhttprequest'
};

const Allowlist = {
    'TRIM_EXPRESSION': /^\n+|\n+$/g,
    'VALUE_SEPARATOR': '\n'
};

const BrowserType = {
    'CHROMIUM': chrome.runtime.getURL('/').startsWith('chrome-extension'),
    'FIREFOX': chrome.runtime.getURL('/').startsWith('moz-extension')
};

const IconType = {
    'Default': {
        'Enabled': {
            '16': chrome.runtime.getURL('icons/action/default/icon16-default.png'),
            '18': chrome.runtime.getURL('icons/action/default/icon18-default.png'),
            '19': chrome.runtime.getURL('icons/action/default/icon19-default.png'),
            '32': chrome.runtime.getURL('icons/action/default/icon32-default.png'),
            '36': chrome.runtime.getURL('icons/action/default/icon36-default.png'),
            '38': chrome.runtime.getURL('icons/action/default/icon38-default.png'),
            '64': chrome.runtime.getURL('icons/action/default/icon64-default.png')
        },
        'Disabled': {
            '16': chrome.runtime.getURL('icons/action/default/icon16-disabled.png'),
            '18': chrome.runtime.getURL('icons/action/default/icon18-disabled.png'),
            '19': chrome.runtime.getURL('icons/action/default/icon19-disabled.png'),
            '32': chrome.runtime.getURL('icons/action/default/icon32-disabled.png'),
            '36': chrome.runtime.getURL('icons/action/default/icon36-disabled.png'),
            '38': chrome.runtime.getURL('icons/action/default/icon38-disabled.png'),
            '64': chrome.runtime.getURL('icons/action/default/icon64-disabled.png')
        }
    },
    'Light': {
        'Enabled': {
            '16': chrome.runtime.getURL('icons/action/light/icon16-default.png'),
            '18': chrome.runtime.getURL('icons/action/light/icon18-default.png'),
            '19': chrome.runtime.getURL('icons/action/light/icon19-default.png'),
            '32': chrome.runtime.getURL('icons/action/light/icon32-default.png'),
            '36': chrome.runtime.getURL('icons/action/light/icon36-default.png'),
            '38': chrome.runtime.getURL('icons/action/light/icon38-default.png'),
            '64': chrome.runtime.getURL('icons/action/light/icon64-default.png')
        },
        'Disabled': {
            '16': chrome.runtime.getURL('icons/action/light/icon16-disabled.png'),
            '18': chrome.runtime.getURL('icons/action/light/icon18-disabled.png'),
            '19': chrome.runtime.getURL('icons/action/light/icon19-disabled.png'),
            '32': chrome.runtime.getURL('icons/action/light/icon32-disabled.png'),
            '36': chrome.runtime.getURL('icons/action/light/icon36-disabled.png'),
            '38': chrome.runtime.getURL('icons/action/light/icon38-disabled.png'),
            '64': chrome.runtime.getURL('icons/action/light/icon64-disabled.png')
        }
    },
    'Grey': {
        'Enabled': {
            '16': chrome.runtime.getURL('icons/action/grey/icon16-default.png'),
            '18': chrome.runtime.getURL('icons/action/grey/icon18-default.png'),
            '19': chrome.runtime.getURL('icons/action/grey/icon19-default.png'),
            '32': chrome.runtime.getURL('icons/action/grey/icon32-default.png'),
            '36': chrome.runtime.getURL('icons/action/grey/icon36-default.png'),
            '38': chrome.runtime.getURL('icons/action/grey/icon38-default.png'),
            '64': chrome.runtime.getURL('icons/action/grey/icon64-default.png')
        },
        'Disabled': {
            '16': chrome.runtime.getURL('icons/action/grey/icon16-disabled.png'),
            '18': chrome.runtime.getURL('icons/action/grey/icon18-disabled.png'),
            '19': chrome.runtime.getURL('icons/action/grey/icon19-disabled.png'),
            '32': chrome.runtime.getURL('icons/action/grey/icon32-disabled.png'),
            '36': chrome.runtime.getURL('icons/action/grey/icon36-disabled.png'),
            '38': chrome.runtime.getURL('icons/action/grey/icon38-disabled.png'),
            '64': chrome.runtime.getURL('icons/action/grey/icon64-disabled.png')
        }
    }
};

const Regex = {
    'GOOGLE_FONTS': /fonts\.(googleapis|gstatic)\.com\/(?!.*(Material\+Icons|materialicons).*).*/,
    'GOOGLE_MATERIAL_ICONS': /fonts\.(googleapis|gstatic)\.com\/.*\?family=.*Material\+Icons/,
    'JSDELIVR_COMBINE': /cdn\.jsdelivr\.net.*\/combine.*jquery.*hogan.*algoliasearch.*autocomplete.*/,
    'BOOTSTRAP_DATEPICKER_3': /\/bootstrap-datepicker3.*\.css/,
    'BOOTSTRAP_DATEPICKER': /\/bootstrap-datepicker.*\.css/,
    'FONT_AWESOME': /use\.fontawesome\.com\/fa-loader\.css/,
    'FONT_AWESOME_WITH_CODE': /use\.fontawesome\.com\/[a-z0-9]{10}\.(js|css)/,
    'FONT_AWESOME_FONTS_ONLY': /\/font-?awesome\/(?:\d{1,2}\.){1,3}\d{1,2}\/fonts\//,
    'BOOTSTRAP_FONTS_ONLY': /\/bootstrap\/(?:\d{1,2}\.){1,3}\d{1,2}\/fonts\//,
    'ROCKET_LOADER': /ajax\.cloudflare\.com\/cdn-cgi\/scripts\/[\d\w]{8}\/cloudflare-static\/rocket-loader\.min\.js/
};

const MaterialIcons = {
    'DEFAULT': 'flUhRq6tzZclQEJ-Vdg-IuiaDsNc.woff2'
};

const Links = {
    'CODEBERG_HTML_FILTER': 'https://codeberg.org/nobody/LocalCDN/wiki/Home#user-content-7-a-website-looks-weird-or-cannot-be-used-if-i-deactivate-localcdn-everything-works-what-is-the-problem',
    'CODEBERG_RULESET': 'https://codeberg.org/nobody/LocalCDN/wiki/Home#user-content-6-why-do-i-need-this-rule-generator-i-use-an-adblocker-and-want-to-import-these-rules-how-does-it-work',
    'WELCOME': chrome.runtime.getURL('pages/welcome/welcome.html'),
    'DONATE': chrome.runtime.getURL('pages/donate/donate.html'),
    'CHANGELOG': chrome.runtime.getURL('pages/updates/updates.html'),
    'FAQ': chrome.runtime.getURL('pages/help/help.html'),
    'FAQ_HTML_FILTER': chrome.runtime.getURL('pages/help/help.html#html-filter'),
    'STATISTICS': chrome.runtime.getURL('pages/statistics/statistics.html'),
    'LOCALCDN_TEST': 'https://www.localcdn.org/test',
    'LOCALCDN_TEST_WEBSITE': 'https://www.localcdn.org/test/check',
    'WEBLATE': 'https://hosted.weblate.org/projects/localcdn/localcdn/',
    'LOGGING': chrome.runtime.getURL('pages/logging/logging.html'),
};

const CDNs = {
    'ajax.googleapis.com': 'Google Hosted Libraries',
    'ajax.aspnetcdn.com': 'Microsoft Ajax CDN',
    'ajax.microsoft.com': 'Microsoft Ajax CDN [Deprecated]',
    'cdnjs.cloudflare.com': 'CDNJS (Cloudflare)',
    'code.jquery.com': 'jQuery CDN (MaxCDN)',
    'cdn.jsdelivr.net': 'jsDelivr (Cloudflare)',
    'yastatic.net': 'Yandex CDN',
    'yandex.st': 'Yandex CDN [Deprecated]',
    'apps.bdimg.com': 'Baidu CDN',
    'libs.baidu.com': 'Baidu CDN [Deprecated]',
    'lib.sinaapp.com': 'Sina Public Resources',
    'upcdn.b0.upaiyun.com': 'UpYun Library',
    'cdn.bootcss.com': 'BootCDN #1',
    'sdn.geekzu.org': 'Geekzu Public Service [Mirror]',
    'ajax.proxy.ustclug.org': 'USTC Linux User Group [Mirror]',
    'unpkg.com': 'UNPKG (Cloudflare)',
    'stackpath.bootstrapcdn.com': 'StackPath BootstrapCDN',
    'maxcdn.bootstrapcdn.com': 'MaxCDN Bootstrap CDN',
    'use.fontawesome.com': 'Font Awesome CDN',
    'ajax.cloudflare.com': 'Cloudflare CDN',
    'akamai-webcdn.kgstatic.net': 'Akamai WebCDN',
    'netdna.bootstrapcdn.com': 'NetDNA',
    'pagecdn.io': 'PageCDN',
    'fonts.googleapis.com': 'Google',
    'fonts.gstatic.com': 'Google',
    'gitcdn.github.io': 'GitHub',
    'cdn.bootcdn.net': 'BootCDN #2',
    'vjs.zencdn.net': 'Video.js CDN',
    'cdn.plyr.io': 'Plyr CDN',
    'cdn.materialdesignicons.com': 'MaterialDesign',
    'cdn.ravenjs.com': 'Raven.js',
    'js.appboycdn.com': 'Appboy CDN',
    'cdn.embed.ly': 'embedly',
    'cdn.datatables.net': 'DataTables',
    'mathjax.rstudio.com': 'MathJax RStudio',
    'cdn.mathjax.org': 'MathJax CDN',
};

const IgnoredHost = {
    'fonts.googleapis.com': true,
    'fonts.gstatic.com': true,
};

/**
 * MathJax is a very large library with over 30,000 files.
 * That is why it is better to specify each one here.
 *
 * https://codeberg.org/nobody/LocalCDN/issues/75
 */
const MathJaxFiles = {
    'config/default.js': true,
    'config/TeX-AMS_HTML-full.js': true,
    'config/TeX-AMS-MML_HTMLorMML.js': true,
    'config/TeX-MML-AM_CHTML.js': true,
    'extensions/TeX/begingroup.js': true,
    'extensions/TeX/cancel.js': true,
    'extensions/TeX/mhchem3/mhchem.js': true,
    'extensions/MathEvents.js': true,
    'extensions/MathMenu.js': true,
    'extensions/MathZoom.js': true,
    'extensions/tex2jax.js': true,
    'fonts/HTML-CSS/TeX/woff/MathJax_Main-Regular.woff': true,
    'fonts/HTML-CSS/TeX/woff/MathJax_Math-Italic.woff': true,
    'fonts/HTML-CSS/TeX/woff/MathJax_Size1-Regular.woff': true,
    'fonts/HTML-CSS/TeX/woff/MathJax_Size2-Regular.woff': true,
    'fonts/HTML-CSS/TeX/woff/MathJax_Size3-Regular.woff': true,
    'jax/element/mml/jax.js': true,
    'jax/element/mml/optable/BasicLatin.js': true,
    'jax/element/mml/optable/GeneralPunctuation.js': true,
    'jax/element/mml/optable/Latin1Supplement.js': true,
    'jax/element/mml/optable/MathOperators.js': true,
    'jax/element/mml/optable/SuppMathOperators.js': true,
    'jax/input/TeX/config.js': true,
    'jax/input/TeX/jax.js': true,
    'jax/output/CommonHTML/fonts/TeX/fontdata.js': true,
    'jax/output/CommonHTML/autoload/mtable.js': true,
    'jax/output/CommonHTML/jax.js': true,
    'jax/output/HTML-CSS/autoload/menclose.js': true,
    'jax/output/HTML-CSS/autoload/mtable.js': true,
    'jax/output/HTML-CSS/autoload/multiline.js': true,
    'jax/output/HTML-CSS/config.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/Latin1Supplement.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/MiscSymbols.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/SuppMathOperators.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/MathOperators.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/Main.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/BoxDrawing.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/BBBold.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/LetterlikeSymbols.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/EnclosedAlphanum.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/Dingbats.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/LatinExtendedA.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/CombDiacritMarks.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/MiscTechnical.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/Arrows.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/GeometricShapes.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/GeneralPunctuation.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/PUA.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/SpacingModLetters.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/MiscMathSymbolsB.js': true,
    'jax/output/HTML-CSS/fonts/TeX/AMS/Regular/GreekAndCoptic.js': true,
    'jax/output/HTML-CSS/fonts/TeX/fontdata-extra.js': true,
    'jax/output/HTML-CSS/fonts/TeX/fontdata.js': true,
    'jax/output/HTML-CSS/imageFonts.js': true,
    'jax/output/HTML-CSS/jax.js': true,
};

/**
 * To block bad resources, e.g. fingerprint
 *
 * Necessary if the user has selected the option "Block requests for missing
 * resources Advanced" option is not enabled.
 *
 * https://codeberg.org/nobody/LocalCDN/issues/703
 */
const BadResources = {
    'cdn.jsdelivr.net/npm/@fingerprintjs/': true,
    'cdnjs.cloudflare.com/ajax/libs/fingerprintjs/': true,
    'cdnjs.cloudflare.com/ajax/libs/fingerprintjs2/': true,
    'cdnjs.cloudflare.com/ajax/libs/ClientJS/': true,
};

// Supported charsets for TextDecoder()
// https://developer.mozilla.org/en-US/docs/Web/API/TextDecoder/TextDecoder
const EncodingTypes = {
    'unicode-1-1-utf-8': true,
    'utf-8': true,
    'utf8': true,
    '866': true,
    'cp866': true,
    'csibm866': true,
    'ibm866': true,
    'csisolatin2': true,
    'iso-8859-2': true,
    'iso-ir-101': true,
    'iso8859-2': true,
    'iso88592': true,
    'iso_8859-2': true,
    'iso_8859-2:1987': true,
    'l2': true,
    'latin2': true,
    'csisolatin3': true,
    'iso-8859-3': true,
    'iso-ir-109': true,
    'iso8859-3': true,
    'iso88593': true,
    'iso_8859-3': true,
    'iso_8859-3:1988': true,
    'l3': true,
    'latin3': true,
    'csisolatin4': true,
    'iso-8859-4': true,
    'iso-ir-110': true,
    'iso8859-4': true,
    'iso88594': true,
    'iso_8859-4': true,
    'iso_8859-4:1988': true,
    'l4': true,
    'latin4': true,
    'csisolatincyrillic': true,
    'cyrillic': true,
    'iso-8859-5': true,
    'iso-ir-144': true,
    'iso88595': true,
    'iso_8859-5': true,
    'iso_8859-5:1988': true,
    'arabic': true,
    'asmo-708': true,
    'csiso88596e': true,
    'csiso88596i': true,
    'csisolatinarabic': true,
    'ecma-114': true,
    'iso-8859-6': true,
    'iso-8859-6-e': true,
    'iso-8859-6-i': true,
    'iso-ir-127': true,
    'iso8859-6': true,
    'iso88596': true,
    'iso_8859-6': true,
    'iso_8859-6:1987': true,
    'csisolatingreek': true,
    'ecma-118': true,
    'elot_928': true,
    'greek': true,
    'greek8': true,
    'iso-8859-7': true,
    'iso-ir-126': true,
    'iso8859-7': true,
    'iso88597': true,
    'iso_8859-7': true,
    'iso_8859-7:1987': true,
    'sun_eu_greek': true,
    'csiso88598e': true,
    'csisolatinhebrew': true,
    'hebrew': true,
    'iso-8859-8': true,
    'iso-8859-8-e': true,
    'iso-ir-138': true,
    'iso8859-8': true,
    'iso88598': true,
    'iso_8859-8': true,
    'iso_8859-8:1988': true,
    'visual': true,
    'csiso88598i': true,
    'iso-8859-8-i': true,
    'logical': true,
    'csisolatin6': true,
    'iso-8859-10': true,
    'iso-ir-157': true,
    'iso8859-10': true,
    'iso885910': true,
    'l6': true,
    'latin6': true,
    'iso-8859-13': true,
    'iso8859-13': true,
    'iso885913': true,
    'iso-8859-14': true,
    'iso8859-14': true,
    'iso885914': true,
    'csisolatin9': true,
    'iso-8859-15': true,
    'iso8859-15': true,
    'iso885915': true,
    'l9': true,
    'latin9': true,
    'iso-8859-16': true,
    'cskoi8r': true,
    'koi': true,
    'koi8': true,
    'koi8-r': true,
    'koi8_r': true,
    'koi8-u': true,
    'csmacintosh': true,
    'mac': true,
    'macintosh': true,
    'x-mac-roman': true,
    'dos-874': true,
    'iso-8859-11': true,
    'iso8859-11': true,
    'iso885911': true,
    'tis-620': true,
    'windows-874': true,
    'cp1250': true,
    'windows-1250': true,
    'x-cp1250': true,
    'cp1251': true,
    'windows-1251': true,
    'x-cp1251': true,
    'ansi_x3.4-1968': true,
    'ascii': true,
    'cp1252': true,
    'cp819': true,
    'csisolatin1': true,
    'ibm819': true,
    'iso-8859-1': true,
    'iso-ir-100': true,
    'iso8859-1': true,
    'iso88591': true,
    'iso_8859-1': true,
    'iso_8859-1:1987': true,
    'l1': true,
    'latin1': true,
    'us-ascii': true,
    'windows-1252': true,
    'x-cp1252': true,
    'cp1253': true,
    'windows-1253': true,
    'x-cp1253': true,
    'cp1254': true,
    'csisolatin5': true,
    'iso-8859-9': true,
    'iso-ir-148': true,
    'iso8859-9': true,
    'iso88599': true,
    'iso_8859-9': true,
    'iso_8859-9:1989': true,
    'l5': true,
    'latin5': true,
    'windows-1254': true,
    'x-cp1254': true,
    'cp1255': true,
    'windows-1255': true,
    'x-cp1255': true,
    'cp1256': true,
    'windows-1256': true,
    'x-cp1256': true,
    'cp1257': true,
    'windows-1257': true,
    'x-cp1257': true,
    'cp1258': true,
    'windows-1258': true,
    'x-cp1258': true,
    'x-mac-cyrillic': true,
    'x-mac-ukrainian': true,
    'chinese': true,
    'csgb2312': true,
    'csiso58gb231280': true,
    'gb2312': true,
    'gb_2312': true,
    'gb_2312-80': true,
    'gbk': true,
    'iso-ir-58': true,
    'x-gbk': true,
    'gb18030': true,
    'hz-gb-2312': true,
    'big5': true,
    'big5-hkscs': true,
    'cn-big5': true,
    'csbig5': true,
    'x-x-big5': true,
    'cseucpkdfmtjapanese': true,
    'euc-jp': true,
    'x-euc-jp': true,
    'csiso2022jp': true,
    'iso-2022-jp': true,
    'iso-2022-jp-2': true,
    'csshiftjis': true,
    'ms_kanji': true,
    'shift-jis': true,
    'shift_jis': true,
    'sjis': true,
    'windows-31j': true,
    'x-sjis': true,
    'cseuckr': true,
    'csksc56011987': true,
    'euc-kr': true,
    'iso-ir-149': true,
    'korean': true,
    'ks_c_5601-1987': true,
    'ks_c_5601-1989': true,
    'ksc5601': true,
    'ksc_5601': true,
    'windows-949': true,
    'csiso2022kr': true,
    'iso-2022-kr': true,
    'utf-16be': true,
    'utf-16': true,
    'utf-16le': true,
    'x-user-defined': true,
    'iso-2022-cn': true,
    'iso-2022-cn-ext': true
};