feat(nls): support nested localized messages

packages/nls/README.md

@@ -21,16 +21,19 @@ npm i @tiny-libs/nls
 import nls from '@tiny-libs/nls'
 
 const messages = {
-  'say.hello': '你好, {0}'
+  'say.hello': '你好, {0}',
+  say: {
+    yes: '好的, {0}'
+  }
 }
 
 const localize = nls.loadMessages(messages)
 
 console.log(localize('hello.world', 'Hello World')) // Output: Hello World
 console.log(localize('say.hello', 'Hello, {0}', 'Alex')) // Output: 你好, Alex
+console.log(localize('say.yes', 'Yes, {0}', 'Alex')) // Output: 好的, Alex
 ```
 
 ## License
 
 [MIT](./LICENSE) copyright © 2024-present alex wei
-

packages/nls/src/index.ts

@@ -50,13 +50,37 @@ function format(
   return result
 }
 
-function createLocalizeFunc(messages: Record<string, string>): LocalizeFunc {
+function findNestedObject(
+  obj: Record<string, unknown>,
+  key: string
+): string | undefined {
+  const value = obj[key]
+
+  if (value !== undefined && typeof value === 'string') {
+    return value
+  }
+
+  const keys = key.split('.')
+  let result: string | Record<string, unknown> = obj
+
+  for (const k of keys) {
+    if (result[k] !== undefined) {
+      result = result[k]
+    } else {
+      return undefined
+    }
+  }
+
+  return typeof result === 'string' ? result : undefined
+}
+
+function createLocalizeFunc(messages: Record<string, unknown>): LocalizeFunc {
   return function (key: string, message: string, ...args: any[]): string {
-    return format(messages[key] || message, args)
+    return format(findNestedObject(messages, key) || message, args)
   }
 }
 
-function loadMessages(messages: Record<string, string> = {}): LocalizeFunc {
+function loadMessages(messages: Record<string, unknown> = {}): LocalizeFunc {
   return createLocalizeFunc(messages)
 }
 

packages/nls/test.mjs

@@ -1,10 +1,14 @@
 import nls from './dist/index.mjs'
 
 const messages = {
-  'say.hello': '你好, {0}'
+  'say.hello': '你好, {0}',
+  say: {
+    yes: '好的, {0}'
+  }
 }
 
 const localize = nls.loadMessages(messages)
 
 console.log(localize('hello.world', 'Hello World'))
 console.log(localize('say.hello', 'Hello, {0}', 'Alex'))
+console.log(localize('say.yes', 'Yes, {0}', 'Alex'))