From 6e28452434b56fecdf56738114b4e9b2368f94a4 Mon Sep 17 00:00:00 2001
From: Ben Cooke <benkcooke@gmail.com>
Date: Wed, 18 Feb 2026 10:11:45 -0500
Subject: [PATCH] [MM-67563] Change websocket format for translation update
 events (#35268)

---
 .../channels/src/actions/websocket_actions.ts | 21 +++++++++++++++----
 .../src/reducers/entities/posts.ts            | 18 ++++++++++------
 .../platform/client/src/websocket_messages.ts | 10 +++++----
 3 files changed, 35 insertions(+), 14 deletions(-)

diff --git a/webapp/channels/src/actions/websocket_actions.ts b/webapp/channels/src/actions/websocket_actions.ts
index c89f04f48f8..25614afeb14 100644
--- a/webapp/channels/src/actions/websocket_actions.ts
+++ b/webapp/channels/src/actions/websocket_actions.ts
@@ -142,6 +142,7 @@ import {openModal, closeModal} from 'actions/views/modals';
 import {closeRightHandSide} from 'actions/views/rhs';
 import {resetWsErrorCount} from 'actions/views/system';
 import {updateThreadLastOpened} from 'actions/views/threads';
+import {getCurrentLocale} from 'selectors/i18n';
 import {getSelectedChannelId, getSelectedPost} from 'selectors/rhs';
 import {isThreadOpen, isThreadManuallyUnread} from 'selectors/views/threads';
 import store from 'stores/redux_store';
@@ -2043,10 +2044,22 @@ export function handleContentFlaggingReportValueChanged(msg: WebSocketMessages.C
     };
 }
 
-export function handlePostTranslationUpdated(msg: WebSocketMessages.PostTranslationUpdated) {
-    return {
-        type: PostTypes.POST_TRANSLATION_UPDATED,
-        data: msg.data,
+export function handlePostTranslationUpdated(msg: WebSocketMessages.PostTranslationUpdated): ThunkActionFunc<void> {
+    return (dispatch, getState) => {
+        const locale = getCurrentLocale(getState());
+        const t = msg.data.translations[locale];
+        if (!t) {
+            return;
+        }
+
+        dispatch({
+            type: PostTypes.POST_TRANSLATION_UPDATED,
+            data: {
+                object_id: msg.data.object_id,
+                language: locale,
+                ...t,
+            },
+        });
     };
 }
 
diff --git a/webapp/channels/src/packages/mattermost-redux/src/reducers/entities/posts.ts b/webapp/channels/src/packages/mattermost-redux/src/reducers/entities/posts.ts
index 319d1b7391f..23296c18533 100644
--- a/webapp/channels/src/packages/mattermost-redux/src/reducers/entities/posts.ts
+++ b/webapp/channels/src/packages/mattermost-redux/src/reducers/entities/posts.ts
@@ -1,7 +1,6 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 
-import type {WebSocketMessages} from '@mattermost/client';
 import type {
     OpenGraphMetadata,
     Post,
@@ -434,20 +433,27 @@ export function handlePosts(state: IDMappedObjects<Post> = {}, action: MMReduxAc
     }
 
     case PostTypes.POST_TRANSLATION_UPDATED: {
-        const data: WebSocketMessages.PostTranslationUpdated['data'] = action.data;
+        const data: {
+            object_id: string;
+            language: string;
+            state: 'ready' | 'skipped' | 'processing' | 'unavailable';
+            translation?: string;
+            src_lang?: string;
+        } = action.data;
         if (!state[data.object_id]) {
             return state;
         }
 
-        const translations = state[data.object_id].metadata?.translations || {};
+        const existingTranslations = state[data.object_id].metadata?.translations || {};
         const newTranslations = {
-            ...translations,
+            ...existingTranslations,
             [data.language]: {
-                lang: data.language,
                 object: data.translation ? JSON.parse(data.translation) : undefined,
                 state: data.state,
                 source_lang: data.src_lang,
-            }};
+            },
+        };
+
         return {
             ...state,
             [data.object_id]: {
diff --git a/webapp/platform/client/src/websocket_messages.ts b/webapp/platform/client/src/websocket_messages.ts
index f8b178f67d0..e319d9305b3 100644
--- a/webapp/platform/client/src/websocket_messages.ts
+++ b/webapp/platform/client/src/websocket_messages.ts
@@ -423,11 +423,13 @@ export type RecapUpdated = BaseWebSocketMessage<WebSocketEvents.RecapUpdated, {
 // Post translation messages
 
 export type PostTranslationUpdated = BaseWebSocketMessage<WebSocketEvents.PostTranslationUpdated, {
-    language: string;
     object_id: string;
-    src_lang: string;
-    state: 'ready' | 'skipped' | 'processing' | 'unavailable';
-    translation: string;
+    translations: Record<string, {
+        state: 'ready' | 'skipped' | 'processing' | 'unavailable';
+        translation?: string;
+        translation_type?: string;
+        src_lang?: string;
+    }>;
 }>;
 
 // Plugin and integration messages