#428

frontend/src/lib/routeLocales.ts

@@ -1,5 +1,5 @@
 import type { QueryClient } from '@tanstack/react-query'
-import type { IndexRouteObject, NonIndexRouteObject, Params } from 'react-router-dom'
+import type { IndexRouteObject, Location, NonIndexRouteObject, Params } from 'react-router-dom'
 
 import type { LocaleCode } from '@/lib/locales'
 
@@ -9,8 +9,15 @@ export type PagePreparation = {
     locale: LocaleCode
     searchParams: URLSearchParams }
 
+export type LocaleSwitchRequest = {
+    location: Pick<Location, 'pathname' | 'search' | 'hash'>
+    params: Readonly<Params>
+    locale: LocaleCode
+    targetLocale: LocaleCode }
+
 export type PageRouteHandle = {
     prepare?: (request: PagePreparation) => Promise<number>
+    switchLocale?: (request: LocaleSwitchRequest) => Promise<string>
     locale?: LocaleCode
     robots?: 'noindex'
     authentication?: 'user'