153 lines
4.7 KiB
TypeScript
153 lines
4.7 KiB
TypeScript
import { shouldPolyfill as shouldPolyfillLocale } from "@formatjs/intl-locale/lib/should-polyfill";
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import { shouldPolyfill as shouldPolyfillPluralRules } from "@formatjs/intl-pluralrules/lib/should-polyfill";
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import { shouldPolyfill as shouldPolyfillRelativeTime } from "@formatjs/intl-relativetimeformat/lib/should-polyfill";
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import { shouldPolyfill as shouldPolyfillDateTime } from "@formatjs/intl-datetimeformat/lib/should-polyfill";
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import IntlMessageFormat from "intl-messageformat";
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import { Resources } from "../../types";
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export type LocalizeFunc = (key: string, ...args: any[]) => string;
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interface FormatType {
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[format: string]: any;
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}
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export interface FormatsType {
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number: FormatType;
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date: FormatType;
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time: FormatType;
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}
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let loadedPolyfillLocale: Set<string> | undefined;
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const polyfillPluralRules = shouldPolyfillPluralRules();
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const polyfillRelativeTime = shouldPolyfillRelativeTime();
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const polyfillDateTime = shouldPolyfillDateTime();
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const polyfills: Promise<any>[] = [];
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if (__BUILD__ === "latest") {
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if (shouldPolyfillLocale()) {
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polyfills.push(import("@formatjs/intl-locale/polyfill"));
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}
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if (polyfillPluralRules) {
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polyfills.push(import("@formatjs/intl-pluralrules/polyfill"));
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}
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if (polyfillRelativeTime) {
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polyfills.push(import("@formatjs/intl-relativetimeformat/polyfill"));
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}
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if (polyfillDateTime) {
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polyfills.push(import("@formatjs/intl-datetimeformat/polyfill"));
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}
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}
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let polyfillLoaded = polyfills.length === 0;
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export const polyfillsLoaded = polyfillLoaded
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? undefined
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: Promise.all(polyfills).then(() => {
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loadedPolyfillLocale = new Set();
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polyfillLoaded = true;
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// Load English so it becomes the default
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return loadPolyfillLocales("en");
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});
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/**
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* Adapted from Polymer app-localize-behavior.
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*
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* Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
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* This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
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* The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
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* The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
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* Code distributed by Google as part of the polymer project is also
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* subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
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*/
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/**
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* Optional dictionary of user defined formats, as explained here:
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* http://formatjs.io/guides/message-syntax/#custom-formats
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*
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* For example, a valid dictionary of formats would be:
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* this.formats = {
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* number: { USD: { style: 'currency', currency: 'USD' } }
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* }
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*/
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export const computeLocalize = async (
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cache: any,
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language: string,
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resources: Resources,
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formats?: FormatsType
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): Promise<LocalizeFunc> => {
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if (!polyfillLoaded) {
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await polyfillsLoaded;
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}
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loadPolyfillLocales(language);
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// Everytime any of the parameters change, invalidate the strings cache.
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cache._localizationCache = {};
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return (key, ...args) => {
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if (!key || !resources || !language || !resources[language]) {
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return "";
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}
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// Cache the key/value pairs for the same language, so that we don't
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// do extra work if we're just reusing strings across an application.
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const translatedValue = resources[language][key];
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if (!translatedValue) {
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return "";
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}
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const messageKey = key + translatedValue;
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let translatedMessage = cache._localizationCache[messageKey] as
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| IntlMessageFormat
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| undefined;
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if (!translatedMessage) {
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try {
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translatedMessage = new IntlMessageFormat(
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translatedValue,
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language,
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formats
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);
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} catch (err) {
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return "Translation error: " + err.message;
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}
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cache._localizationCache[messageKey] = translatedMessage;
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}
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let argObject = {};
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if (args.length === 1 && typeof args[0] === "object") {
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argObject = args[0];
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} else {
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for (let i = 0; i < args.length; i += 2) {
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argObject[args[i]] = args[i + 1];
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}
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}
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try {
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return translatedMessage.format<string>(argObject) as string;
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} catch (err) {
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return "Translation " + err;
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}
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};
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};
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export const loadPolyfillLocales = async (language: string) => {
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if (!loadedPolyfillLocale || loadedPolyfillLocale.has(language)) {
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return;
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}
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loadedPolyfillLocale.add(language);
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try {
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if (polyfillPluralRules) {
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await import(`@formatjs/intl-pluralrules/locale-data/${language}`);
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}
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if (polyfillRelativeTime) {
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await import(`@formatjs/intl-relativetimeformat/locale-data/${language}`);
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}
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if (polyfillDateTime) {
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await import(`@formatjs/intl-datetimeformat/locale-data/${language}`);
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}
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} catch (_e) {
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// Ignore
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}
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};
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