From a8039e6b1dd676f0233bfddb09de089d1a508b60 Mon Sep 17 00:00:00 2001
From: 3y3 <3y3@ya.ru>
Date: Thu, 7 Sep 2023 17:11:14 +0300
Subject: [PATCH] feat: Add `configure` util

---
 .eslintrc                   |  4 ----
 .eslintrc.js                | 15 +++++++++++++
 .eslintrc.publish.js        |  4 ++++
 src/config/i18n.ts          | 44 +++++++++++++++++++++++++++++++++++++
 src/config/index.ts         | 34 ++++++++++++++++++++++++++++
 src/hooks/index.ts          |  1 +
 src/hooks/useTranslation.ts |  8 +++++++
 7 files changed, 106 insertions(+), 4 deletions(-)
 delete mode 100644 .eslintrc
 create mode 100644 .eslintrc.js
 create mode 100644 .eslintrc.publish.js
 create mode 100644 src/config/i18n.ts
 create mode 100644 src/config/index.ts
 create mode 100644 src/hooks/useTranslation.ts

diff --git a/.eslintrc b/.eslintrc
deleted file mode 100644
index b4c98570..00000000
--- a/.eslintrc
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-    "extends": ["@gravity-ui/eslint-config"],
-    "root": true
-}
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 00000000..bc9579de
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,15 @@
+module.exports = {
+    extends: ['@gravity-ui/eslint-config'],
+    root: true,
+    rules: {
+        'no-param-reassign': 'off',
+    },
+    overrides: [
+        {
+            files: ['!src/**/*', '!demo/**/*'],
+            env: {
+                node: true,
+            },
+        },
+    ],
+};
diff --git a/.eslintrc.publish.js b/.eslintrc.publish.js
new file mode 100644
index 00000000..e54537de
--- /dev/null
+++ b/.eslintrc.publish.js
@@ -0,0 +1,4 @@
+module.exports = {
+    extends: ['@gravity-ui/eslint-config/prettier', './.eslintrc.js'],
+    root: true,
+};
diff --git a/src/config/i18n.ts b/src/config/i18n.ts
new file mode 100644
index 00000000..4f04a66d
--- /dev/null
+++ b/src/config/i18n.ts
@@ -0,0 +1,44 @@
+import i18n, {TFunction} from 'i18next';
+import {initReactI18next} from 'react-i18next';
+
+import en from '../i18n/en.json';
+import ru from '../i18n/ru.json';
+import {Lang} from '../models';
+
+export type Loc = Record<string, typeof en>;
+
+export interface I18NConfig {
+    lang?: string;
+    loc?: Loc;
+}
+
+let initializePromise: Promise<TFunction> | null = null;
+
+export const configureI18N = ({lang, loc}: I18NConfig) => {
+    if (initializePromise === null) {
+        lang = lang || Lang.En;
+        loc = loc || {ru, en};
+
+        initializePromise = i18n.use(initReactI18next).init({
+            lng: lang,
+            fallbackLng: lang,
+            ns: Object.keys(loc[lang as Lang]),
+            resources: loc,
+            interpolation: {
+                escapeValue: false,
+            },
+        });
+    } else {
+        if (lang && lang !== i18n.language) {
+            i18n.changeLanguage(lang);
+        }
+
+        if (loc) {
+            for (const [lng, namespaces] of Object.entries(loc)) {
+                for (const [ns, resources] of Object.entries(namespaces as Loc[Lang])) {
+                    i18n.addResources(lng, ns, resources);
+                }
+            }
+        }
+    }
+};
diff --git a/src/config/index.ts b/src/config/index.ts
new file mode 100644
index 00000000..c3eb0a54
--- /dev/null
+++ b/src/config/index.ts
@@ -0,0 +1,34 @@
+import {Config, Lang} from '../models';
+
+import {configureI18N} from './i18n';
+
+type Subscriber = (config: Config) => void;
+
+const subs: Set<Subscriber> = new Set();
+
+let config: Config = {
+    lang: Lang.En,
+};
+
+export const configure = (newConfig: Partial<Config> = {}) => {
+    config = Object.assign({}, config, newConfig);
+
+    configureI18N({
+        lang: config.lang,
+        loc: config.loc,
+    });
+
+    subs.forEach((sub) => {
+        sub(config);
+    });
+};
+
+export const subscribeConfigure = (sub: Subscriber) => {
+    subs.add(sub);
+
+    return () => {
+        subs.delete(sub);
+    };
+};
+
+export const getConfig = () => config;
diff --git a/src/hooks/index.ts b/src/hooks/index.ts
index 2667adf3..10e96b6b 100644
--- a/src/hooks/index.ts
+++ b/src/hooks/index.ts
@@ -1,2 +1,3 @@
 export * from './useForkRef';
 export * from './usePopper';
+export * from './useTranslation';
diff --git a/src/hooks/useTranslation.ts b/src/hooks/useTranslation.ts
new file mode 100644
index 00000000..ce69ede0
--- /dev/null
+++ b/src/hooks/useTranslation.ts
@@ -0,0 +1,8 @@
+import {useTranslation as useTranslationI18N} from 'react-i18next';
+
+import {configure} from '../config';
+
+export function useTranslation(...args: Parameters<typeof useTranslationI18N>) {
+    configure();
+    return useTranslationI18N(...args);
+}