Pass locale in preview payload

src/adapter/next/handler.ts

@@ -43,6 +43,7 @@ export function createHandler<Driver extends AvailableDrivers>(
           first: true,
           select: Entry.url,
           id: info.entryId,
+          locale: info.locale,
           preview: payload ? {payload} : undefined
         })
         if (!url) return new Response('Not found', {status: 404})

src/backend/Handler.ts

@@ -33,6 +33,7 @@ const PrepareBody = object({
 })
 
 const PreviewBody = object({
+  locale: string.nullable,
   entryId: string
 })
 

src/backend/Previews.ts

@@ -1,4 +1,5 @@
 export interface PreviewInfo {
+  locale: string | null
   entryId: string
 }
 

src/core/Preview.ts

@@ -11,6 +11,7 @@ export interface PreviewPayload {
 export type PreviewRequest = PreviewPayload | {entry: EntryRow}
 
 export interface PreviewUpdate {
+  locale: string | null
   entryId: string
   contentHash: string
   status: string

src/dashboard/atoms/EntryEditorAtoms.ts

@@ -734,6 +734,7 @@ export function createEntryEditor(entryData: EntryData) {
     const update = get(yUpdate)
     const status = get(selectedStatus)
     return encodePreviewPayload({
+      locale: activeVersion.locale,
       entryId: activeVersion.id,
       contentHash,
       status: status,
@@ -753,7 +754,10 @@ export function createEntryEditor(entryData: EntryData) {
 
   const previewToken = atom(async get => {
     const client = get(clientAtom)
-    return client.previewToken({entryId: entryData.entryId})
+    return client.previewToken({
+      locale: activeVersion.locale,
+      entryId: entryData.entryId
+    })
   })
 
   return {

src/preview/PreviewPayload.ts

@@ -5,6 +5,7 @@ import * as encoding from 'lib0/encoding.js'
 
 export function encodePreviewPayload(update: PreviewUpdate): Promise<string> {
   const encoder = encoding.createEncoder()
+  encoding.writeVarString(encoder, update.locale ?? '')
   encoding.writeVarString(encoder, update.entryId)
   encoding.writeVarString(encoder, update.contentHash)
   encoding.writeVarString(encoder, update.status)
@@ -17,6 +18,7 @@ export async function decodePreviewPayload(
 ): Promise<PreviewUpdate> {
   const decoder = decoding.createDecoder(new Uint8Array(await decode(payload)))
   return {
+    locale: decoding.readVarString(decoder) || null,
     entryId: decoding.readVarString(decoder),
     contentHash: decoding.readVarString(decoder),
     status: decoding.readVarString(decoder),