wehub-resource-sync
107 lines
2.9 KiB
JavaScript
107 lines
2.9 KiB
JavaScript
import { readFileSync, existsSync } from "node:fs";
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import { dirname, join } from "node:path";
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import { fileURLToPath } from "node:url";
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const __dirname = dirname(fileURLToPath(import.meta.url));
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const LOCALES_DIR = join(__dirname, "locales");
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const FALLBACK_LOCALE = "en";
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const cache = new Map();
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let activeLocale = null;
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let fallbackCatalog = null;
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export function detectLocale() {
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const raw =
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process.env.OMNIROUTE_LANG ||
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process.env.LC_ALL ||
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process.env.LC_MESSAGES ||
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process.env.LANG ||
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FALLBACK_LOCALE;
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return normalize(raw);
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}
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function normalize(raw) {
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const stripped = String(raw).split(".")[0].replaceAll("_", "-");
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if (!stripped || !/^[a-zA-Z0-9-]+$/.test(stripped)) return FALLBACK_LOCALE;
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if (hasCatalog(stripped)) return stripped;
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const base = stripped.split("-")[0];
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if (hasCatalog(base)) return base;
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return FALLBACK_LOCALE;
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}
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function hasCatalog(locale) {
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return existsSync(join(LOCALES_DIR, `${locale}.json`));
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}
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function flattenToMap(obj, prefix, result) {
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for (const [key, value] of Object.entries(obj)) {
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const fullKey = prefix ? `${prefix}.${key}` : key;
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if (value !== null && typeof value === "object" && !Array.isArray(value)) {
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flattenToMap(value, fullKey, result);
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} else if (typeof value === "string") {
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result.set(fullKey, value);
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}
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}
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}
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function loadCatalog(locale) {
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if (cache.has(locale)) return cache.get(locale);
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const file = join(LOCALES_DIR, `${locale}.json`);
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if (!existsSync(file)) {
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cache.set(locale, null);
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return null;
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}
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try {
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const parsed = JSON.parse(readFileSync(file, "utf8"));
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const flat = new Map();
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flattenToMap(parsed, "", flat);
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cache.set(locale, flat);
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return flat;
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} catch {
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cache.set(locale, null);
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return null;
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}
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}
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export function setLocale(locale) {
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activeLocale = normalize(locale);
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loadCatalog(activeLocale);
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return activeLocale;
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}
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export function getLocale() {
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if (!activeLocale) activeLocale = detectLocale();
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return activeLocale;
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}
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function interpolate(template, vars) {
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if (!vars) return template;
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const entries = Object.entries(vars);
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if (entries.length === 0) return template;
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const varMap = new Map(entries);
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return template.replace(/\{(\w+)\}/g, (match, name) => {
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const v = varMap.get(name);
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return v !== undefined ? String(v) : match;
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});
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}
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export function t(key, vars) {
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if (!activeLocale) activeLocale = detectLocale();
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const primary = loadCatalog(activeLocale);
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const fromPrimary = primary?.get(key);
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if (fromPrimary !== undefined) return interpolate(fromPrimary, vars);
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if (activeLocale !== FALLBACK_LOCALE) {
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if (!fallbackCatalog) fallbackCatalog = loadCatalog(FALLBACK_LOCALE);
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const fromFallback = fallbackCatalog?.get(key);
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if (fromFallback !== undefined) return interpolate(fromFallback, vars);
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}
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return key;
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}
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export function resetForTests() {
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cache.clear();
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activeLocale = null;
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fallbackCatalog = null;
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}
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