refactor(project): re-adjust the overall folder

packages/locales/src/index.ts

@@ -0,0 +1,43 @@
+import type {
+  ImportLocaleFn,
+  LoadMessageFn,
+  LocaleSetupOptions,
+  SupportedLanguagesType,
+} from './typing';
+
+import type { App } from 'vue';
+
+import { i18n, loadI18nMessages, loadLocalesMap } from './i18n';
+
+const $t = i18n.global.t;
+
+let loadMessages: LoadMessageFn;
+
+async function loadLocaleMessages(lang: SupportedLanguagesType) {
+  const mergeMessage = await loadMessages(lang);
+  await loadI18nMessages(lang);
+  i18n.global.mergeLocaleMessage(lang, mergeMessage);
+}
+
+async function setupI18n(app: App, options: LocaleSetupOptions = {}) {
+  const { defaultLocale = 'zh-CN' } = options;
+  // app可以自行扩展一些第三方库和组件库的国际化
+  loadMessages = options.loadMessages || (async () => ({}));
+  app.use(i18n);
+  await loadLocaleMessages(defaultLocale);
+
+  // 在控制台打印警告
+  i18n.global.setMissingHandler((locale, key) => {
+    if (options.missingWarn && key.includes('.')) {
+      console.warn(
+        `[intlify] Not found '${key}' key in '${locale}' locale messages.`,
+      );
+    }
+  });
+}
+
+export { $t, i18n, loadLocaleMessages, loadLocalesMap, setupI18n };
+export type { CompileError } from '@intlify/core-base';
+export { useI18n } from 'vue-i18n';
+export type { ImportLocaleFn };
+export type { Locale } from 'vue-i18n';