feat: define LocaleMessageDictionary type (#83)

Author: kazupon

src/utils.ts

@@ -5,8 +5,10 @@ import { VueTemplateCompiler } from '@vue/component-compiler-utils/dist/types'
 import {
   SFCFileInfo,
   Locale,
-  MetaExternalLocaleMessages,
+  LocaleMessageDictionary,
+  LocaleMessage,
   LocaleMessages,
+  MetaExternalLocaleMessages,
   FormatOptions,
   ProviderFactory,
   ProviderConfiguration,
@@ -60,6 +62,10 @@ export function resolve (...paths: string[]): string {
   return path.resolve(...paths)
 }
 
+export function isLocaleMessageDictionary (message: LocaleMessage): message is LocaleMessageDictionary {
+  return typeof message !== 'string' && !Array.isArray(message)
+}
+
 export function reflectSFCDescriptor (basePath: string, components: SFCFileInfo[]): SFCDescriptor[] {
   return components.map(target => {
     const { template, script, styles, customBlocks } = parse({
@@ -402,13 +408,13 @@ export function splitLocaleMessages (
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
     const stack = [] as { key: string, ref: any }[]
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    let targetLocaleMessage = messages[locale] as any
-    if (namespace && targetLocaleMessage[namespace]) {
+    let targetLocaleMessage = messages[locale]
+    if (namespace && isLocaleMessageDictionary(targetLocaleMessage)) {
       const ref1 = targetLocaleMessage
       targetLocaleMessage = targetLocaleMessage[namespace]
       stack.push({ key: namespace, ref: ref1 })
     }
-    if (filename && targetLocaleMessage[filename]) {
+    if (filename && isLocaleMessageDictionary(targetLocaleMessage)) {
       const ref2 = targetLocaleMessage
       targetLocaleMessage = targetLocaleMessage[filename]
       stack.push({ key: filename, ref: ref2 })

types/index.d.ts

@@ -24,9 +24,13 @@ export type Locale = string
  *      }
  *    }
  */
+
+export type LocaleMessageDictionary = {
+  [property: string]: LocaleMessage
+}
 export type LocaleMessage =
   | string
-  | { [property: string]: LocaleMessage }
+  | LocaleMessageDictionary
   | LocaleMessage[]
 export type LocaleMessages = Record<Locale, LocaleMessage>