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eslint-env browser */\nimport { Platform, Subscription } from 'expo-modules-core';\nimport * as rtlDetect from 'rtl-detect';\n\nimport { Localization, Calendar, Locale, CalendarIdentifier } from './Localization.types';\n\nconst getNavigatorLocales = () => {\n return Platform.isDOMAvailable ? navigator.languages || [navigator.language] : [];\n};\n\ntype ExtendedLocale = Intl.Locale &\n // typescript definitions for navigator language don't include some modern Intl properties\n Partial<{\n textInfo: { direction: 'ltr' | 'rtl' };\n timeZones: string[];\n weekInfo: { firstDay: number };\n hourCycles: string[];\n timeZone: string;\n calendars: string[];\n }>;\n\nconst WEB_LANGUAGE_CHANGE_EVENT = 'languagechange';\n// https://wisevoter.com/country-rankings/countries-that-use-fahrenheit/\nconst USES_FAHRENHEIT = [\n 'AG',\n 'BZ',\n 'VG',\n 'FM',\n 'MH',\n 'MS',\n 'KN',\n 'BS',\n 'CY',\n 'TC',\n 'US',\n 'LR',\n 'PW',\n 'KY',\n];\n\nexport function addLocaleListener(listener: (event) => void): Subscription {\n addEventListener(WEB_LANGUAGE_CHANGE_EVENT, listener);\n return {\n remove: () => removeEventListener(WEB_LANGUAGE_CHANGE_EVENT, listener),\n };\n}\n\nexport function addCalendarListener(listener: (event) => void): Subscription {\n addEventListener(WEB_LANGUAGE_CHANGE_EVENT, listener);\n return {\n remove: () => removeEventListener(WEB_LANGUAGE_CHANGE_EVENT, listener),\n };\n}\n\nexport function removeSubscription(subscription: Subscription) {\n subscription.remove();\n}\n\nexport default {\n get currency(): string | null {\n // TODO: Add support\n return null;\n },\n get decimalSeparator(): string {\n return (1.1).toLocaleString().substring(1, 2);\n },\n get digitGroupingSeparator(): string {\n const value = (1000).toLocaleString();\n return value.length === 5 ? value.substring(1, 2) : '';\n },\n get isRTL(): boolean {\n return rtlDetect.isRtlLang(this.locale) ?? false;\n },\n get isMetric(): boolean {\n const { region } = this;\n switch (region) {\n case 'US': // USA\n case 'LR': // Liberia\n case 'MM': // Myanmar\n return false;\n }\n return true;\n },\n get locale(): string {\n if (!Platform.isDOMAvailable) {\n return '';\n }\n const locale =\n navigator.language ||\n navigator['systemLanguage'] ||\n navigator['browserLanguage'] ||\n navigator['userLanguage'] ||\n this.locales[0];\n return locale;\n },\n get locales(): string[] {\n if (!Platform.isDOMAvailable) {\n return [];\n }\n const { languages = [] } = navigator;\n return Array.from(languages);\n },\n get timezone(): string {\n const defaultTimeZone = 'Etc/UTC';\n if (typeof Intl === 'undefined') {\n return defaultTimeZone;\n }\n return Intl.DateTimeFormat().resolvedOptions().timeZone || defaultTimeZone;\n },\n get isoCurrencyCodes(): string[] {\n // TODO(Bacon): Add this - very low priority\n return [];\n },\n get region(): string | null {\n // There is no way to obtain the current region, as is possible on native.\n // Instead, use the country-code from the locale when possible (e.g. \"en-US\").\n const { locale } = this;\n const [, ...suffixes] = typeof locale === 'string' ? locale.split('-') : [];\n for (const suffix of suffixes) {\n if (suffix.length === 2) {\n return suffix.toUpperCase();\n }\n }\n return null;\n },\n\n getLocales(): Locale[] {\n const locales = getNavigatorLocales();\n return locales?.map((languageTag) => {\n // TextInfo is an experimental API that is not available in all browsers.\n // We might want to consider using a locale lookup table instead.\n const locale =\n typeof Intl !== 'undefined'\n ? (new Intl.Locale(languageTag) as unknown as ExtendedLocale)\n : { region: null, textInfo: null, language: null };\n const { region, textInfo, language } = locale;\n\n // Properties added only for compatibility with native, use `toLocaleString` instead.\n const digitGroupingSeparator =\n Array.from((10000).toLocaleString(languageTag)).filter((c) => c > '9' || c < '0')[0] ||\n null; // using 1e5 instead of 1e4 since for some locales (like pl-PL) 1e4 does not use digit grouping\n const decimalSeparator = (1.1).toLocaleString(languageTag).substring(1, 2);\n const temperatureUnit = region ? regionToTemperatureUnit(region) : null;\n\n return {\n languageTag,\n languageCode: language || languageTag.split('-')[0] || 'en',\n textDirection: (textInfo?.direction as 'ltr' | 'rtl') || null,\n digitGroupingSeparator,\n decimalSeparator,\n measurementSystem: null,\n currencyCode: null,\n currencySymbol: null,\n regionCode: region || null,\n temperatureUnit,\n };\n });\n },\n getCalendars(): Calendar[] {\n const locale = ((typeof Intl !== 'undefined'\n ? Intl.DateTimeFormat().resolvedOptions()\n : null) ?? null) as unknown as null | ExtendedLocale;\n return [\n {\n calendar: ((locale?.calendar || locale?.calendars?.[0]) as CalendarIdentifier) || null,\n timeZone: locale?.timeZone || locale?.timeZones?.[0] || null,\n uses24hourClock: (locale?.hourCycle || locale?.hourCycles?.[0])?.startsWith('h2') ?? null, //https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/hourCycle\n firstWeekday: locale?.weekInfo?.firstDay || null,\n },\n ];\n },\n\n async getLocalizationAsync(): Promise<Omit<Localization, 'getCalendars' | 'getLocales'>> {\n const {\n currency,\n decimalSeparator,\n digitGroupingSeparator,\n isoCurrencyCodes,\n isMetric,\n isRTL,\n locale,\n locales,\n region,\n timezone,\n } = this;\n return {\n currency,\n decimalSeparator,\n digitGroupingSeparator,\n isoCurrencyCodes,\n isMetric,\n isRTL,\n locale,\n locales,\n region,\n timezone,\n };\n },\n};\n\nfunction regionToTemperatureUnit(region: string) {\n return USES_FAHRENHEIT.includes(region) ? 'fahrenheit' : 'celsius';\n}\n"]} |