105 lines
3.0 KiB
TypeScript
105 lines
3.0 KiB
TypeScript
// Copyright: Ankitects Pty Ltd and contributors
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// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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// An i18n singleton and setupI18n is re-exported via the generated i18n.ts file,
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// so you should not need to access this file directly.
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import "intl-pluralrules";
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import { FluentBundle, FluentResource, FluentNumber } from "@fluent/bundle";
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type RecordVal = number | string | FluentNumber;
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function formatNumbers(args?: Record<string, RecordVal>): void {
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if (!args) {
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return;
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}
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for (const key of Object.keys(args)) {
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if (typeof args[key] === "number") {
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args[key] = new FluentNumber(args[key] as number, {
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maximumFractionDigits: 2,
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});
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}
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}
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}
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export class I18n {
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bundles: FluentBundle[] = [];
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langs: string[] = [];
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translate(key: string, args?: Record<string, RecordVal>): string {
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formatNumbers(args);
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for (const bundle of this.bundles) {
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const msg = bundle.getMessage(key);
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if (msg && msg.value) {
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return bundle.formatPattern(msg.value, args);
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}
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}
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return `missing key: ${key}`;
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}
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supportsVerticalText(): boolean {
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const firstLang = this.bundles[0].locales[0];
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return (
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firstLang.startsWith("ja") ||
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firstLang.startsWith("zh") ||
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firstLang.startsWith("ko")
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);
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}
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direction(): string {
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const firstLang = this.bundles[0].locales[0];
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if (
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firstLang.startsWith("ar") ||
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firstLang.startsWith("he") ||
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firstLang.startsWith("fa")
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) {
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return "rtl";
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} else {
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return "ltr";
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}
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}
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weekdayLabel(n: number): string {
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const firstLang = this.bundles[0].locales[0];
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const now = new Date();
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const daysFromToday = -now.getDay() + n;
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const desiredDay = new Date(now.getTime() + daysFromToday * 86_400_000);
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return desiredDay.toLocaleDateString(firstLang, {
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weekday: "narrow",
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});
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}
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/// Treat text like HTML, merging multiple spaces and converting
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/// newlines to spaces.
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withCollapsedWhitespace(s: string): string {
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return s.replace(/\s+/g, " ");
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}
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}
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// global singleton
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export const i18n = new I18n();
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import type { ModuleName } from "./i18n";
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export async function setupI18n(args: { modules: ModuleName[] }): Promise<void> {
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const resp = await fetch("/_anki/i18nResources", {
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method: "POST",
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body: JSON.stringify(args),
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});
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if (!resp.ok) {
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throw Error(`unexpected reply: ${resp.statusText}`);
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}
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const json = await resp.json();
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i18n.bundles = [];
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for (const i in json.resources) {
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const text = json.resources[i];
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const lang = json.langs[i];
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const bundle = new FluentBundle([lang, "en-US"]);
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const resource = new FluentResource(text);
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bundle.addResource(resource);
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i18n.bundles.push(bundle);
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}
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i18n.langs = json.langs;
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}
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