refresh locales after any change, not just a version update

locales/version.d.ts

@@ -0,0 +1 @@
+export const localesVersion: string;

locales/version.js

@@ -0,0 +1,14 @@
+import { createHash } from 'crypto';
+import locales from './index.js';
+
+// MD5 is acceptable because we don't need cryptographic security.
+const hash = createHash('md5');
+
+// Derive the version hash from locale content exclusively.
+// This avoids the problem of "stuck" translations after modifying locale files.
+const localesText = JSON.stringify(locales);
+hash.update(localesText, 'utf8');
+
+// We can't use regular base64 since this becomes part of a filename.
+// Base64URL avoids special characters that would cause an issue.
+export const localesVersion = hash.digest().toString('base64url');

packages/backend/src/server/web/boot.js

@@ -33,8 +33,17 @@
 		return;
 	}
 
+	// Force update when locales change
+	const langsVersion = LANGS_VERSION;
+	const localeVersion = localStorage.getItem('localeVersion');
+	if (localeVersion !== langsVersion) {
+		console.info(`Updating locales from version ${localeVersion ?? 'N/A'} to ${langsVersion}`);
+		localStorage.removeItem('localeVersion');
+		localStorage.removeItem('locale');
+	}
+
 	//#region Detect language & fetch translations
-	if (!localStorage.hasOwnProperty('locale')) {
+	if (!localStorage.getItem('locale')) {
 		const supportedLangs = LANGS;
 		let lang = localStorage.getItem('lang');
 		if (lang == null || !supportedLangs.includes(lang)) {
@@ -48,37 +57,17 @@
 			}
 		}
 
-		const metaRes = await window.fetch('/api/meta', {
-			method: 'POST',
-			body: JSON.stringify({}),
-			credentials: 'omit',
-			cache: 'no-cache',
-			headers: {
-				'Content-Type': 'application/json',
-			},
-		});
-		if (metaRes.status !== 200) {
-			renderError('META_FETCH');
-			return;
-		}
-		const meta = await metaRes.json();
-		const v = meta.version;
-		if (v == null) {
-			renderError('META_FETCH_V');
-			return;
-		}
-
 		// for https://github.com/misskey-dev/misskey/issues/10202
 		if (lang == null || lang.toString == null || lang.toString() === 'null') {
 			console.error('invalid lang value detected!!!', typeof lang, lang);
 			lang = 'en-US';
 		}
 
-		const localRes = await window.fetch(`/assets/locales/${lang}.${v}.json`);
+		const localRes = await window.fetch(`/assets/locales/${lang}.${langsVersion}.json`);
 		if (localRes.status === 200) {
 			localStorage.setItem('lang', lang);
 			localStorage.setItem('locale', await localRes.text());
-			localStorage.setItem('localeVersion', v);
+			localStorage.setItem('localeVersion', langsVersion);
 		} else {
 			renderError('LOCALE_FETCH');
 			return;

packages/frontend/@types/global.d.ts

@@ -6,6 +6,7 @@
 type FIXME = any;
 
 declare const _LANGS_: string[][];
+declare const _LANGS_VERSION_: string;
 declare const _VERSION_: string;
 declare const _ENV_: string;
 declare const _DEV_: boolean;

packages/frontend/src/boot/common.ts

@@ -8,7 +8,7 @@ import { compareVersions } from 'compare-versions';
 import widgets from '@/widgets/index.js';
 import directives from '@/directives/index.js';
 import components from '@/components/index.js';
-import { version, lang, updateLocale, locale } from '@/config.js';
+import { version, lang, updateLocale, locale, langsVersion } from '@/config.js';
 import { applyTheme } from '@/scripts/theme.js';
 import { isDeviceDarkmode } from '@/scripts/is-device-darkmode.js';
 import { updateI18n } from '@/i18n.js';
@@ -80,14 +80,15 @@ export async function common(createVue: () => App<Element>) {
 
 	//#region Detect language & fetch translations
 	const localeVersion = miLocalStorage.getItem('localeVersion');
-	const localeOutdated = (localeVersion == null || localeVersion !== version || locale == null);
+	const localeOutdated = (localeVersion == null || localeVersion !== langsVersion || locale == null);
 	if (localeOutdated) {
-		const res = await window.fetch(`/assets/locales/${lang}.${version}.json`);
+		console.info(`Updating locales from version ${localeVersion ?? 'N/A'} to ${langsVersion}`);
+		const res = await window.fetch(`/assets/locales/${lang}.${langsVersion}.json`);
 		if (res.status === 200) {
 			const newLocale = await res.text();
 			const parsedNewLocale = JSON.parse(newLocale);
 			miLocalStorage.setItem('locale', newLocale);
-			miLocalStorage.setItem('localeVersion', version);
+			miLocalStorage.setItem('localeVersion', langsVersion);
 			updateLocale(parsedNewLocale);
 			updateI18n(parsedNewLocale);
 		}

packages/frontend/src/config.ts

@@ -15,6 +15,7 @@ export const apiUrl = location.origin + '/api';
 export const wsOrigin = location.origin;
 export const lang = miLocalStorage.getItem('lang') ?? 'en-US';
 export const langs = _LANGS_;
+export const langsVersion = _LANGS_VERSION_;
 const preParseLocale = miLocalStorage.getItem('locale');
 export let locale = preParseLocale ? JSON.parse(preParseLocale) : null;
 export const version = _VERSION_;

packages/frontend/vite.config.ts

@@ -2,7 +2,7 @@ import path from 'path';
 import pluginReplace from '@rollup/plugin-replace';
 import pluginVue from '@vitejs/plugin-vue';
 import { type UserConfig, defineConfig } from 'vite';
-
+import { localesVersion } from '../../locales/version.js';
 import locales from '../../locales/index.js';
 import meta from '../../package.json';
 import packageInfo from './package.json' with { type: 'json' };
@@ -110,6 +110,7 @@ export function getConfig(): UserConfig {
 		define: {
 			_VERSION_: JSON.stringify(meta.version),
 			_LANGS_: JSON.stringify(Object.entries(locales).map(([k, v]) => [k, v._lang_])),
+			_LANGS_VERSION_: JSON.stringify(localesVersion),
 			_ENV_: JSON.stringify(process.env.NODE_ENV),
 			_DEV_: process.env.NODE_ENV !== 'production',
 			_PERF_PREFIX_: JSON.stringify('Misskey:'),

scripts/build-assets.mjs

@@ -15,6 +15,7 @@ import { build as buildLocales } from '../locales/index.js';
 import generateDTS from '../locales/generateDTS.js';
 import meta from '../package.json' with { type: "json" };
 import buildTarball from './tarball.mjs';
+import { localesVersion } from '../locales/version.js';
 
 const configDir = fileURLToPath(new URL('../.config', import.meta.url));
 const configPath = process.env.MISSKEY_CONFIG_YML
@@ -56,10 +57,10 @@ async function copyFrontendLocales() {
 
   await fs.mkdir('./built/_frontend_dist_/locales', { recursive: true });
 
-  const v = { '_version_': meta.version };
+  const v = { '_version_': localesVersion };
 
   for (const [lang, locale] of Object.entries(locales)) {
-    await fs.writeFile(`./built/_frontend_dist_/locales/${lang}.${meta.version}.json`, JSON.stringify({ ...locale, ...v }), 'utf-8');
+    await fs.writeFile(`./built/_frontend_dist_/locales/${lang}.${localesVersion}.json`, JSON.stringify({ ...locale, ...v }), 'utf-8');
   }
 }
 
@@ -76,7 +77,8 @@ async function buildBackendScript() {
     './packages/backend/src/server/web/cli.js'
   ]) {
     let source = await fs.readFile(file, { encoding: 'utf-8' });
-    source = source.replaceAll('LANGS', JSON.stringify(Object.keys(locales)));
+    source = source.replaceAll(/\bLANGS\b/g, JSON.stringify(Object.keys(locales)));
+		source = source.replaceAll(/\bLANGS_VERSION\b/g, JSON.stringify(localesVersion));
     const { code } = await terser.minify(source, { toplevel: true });
     await fs.writeFile(`./packages/backend/built/server/web/${path.basename(file)}`, code);
   }