From 90faa0d90e609b8d5279eef140469c33f5a61f4c Mon Sep 17 00:00:00 2001
From: Fedor Indutny <79877362+indutny-signal@users.noreply.github.com>
Date: Tue, 24 Sep 2024 16:12:28 -0700
Subject: [PATCH] Fix cache invalidation for conversation preload

---
 ts/state/ducks/conversations.ts | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/ts/state/ducks/conversations.ts b/ts/state/ducks/conversations.ts
index d510a1391..24e1493a0 100644
--- a/ts/state/ducks/conversations.ts
+++ b/ts/state/ducks/conversations.ts
@@ -5635,7 +5635,7 @@ export function reducer(
   if (action.type === MESSAGE_EXPIRED) {
     return maybeUpdateSelectedMessageForDetails(
       { messageId: action.payload.id, targetedMessageForDetails: undefined },
-      state
+      dropPreloadData(state)
     );
   }
 
@@ -5949,20 +5949,21 @@ export function reducer(
   if (action.type === 'MESSAGES_ADDED') {
     const { conversationId, isActive, isJustSent, isNewMessage, messages } =
       action.payload;
-    const { messagesByConversation, messagesLookup } = state;
-
-    const existingConversation = messagesByConversation[conversationId];
-    if (!existingConversation) {
-      return state;
-    }
-
-    let { newest, oldest, oldestUnseen, totalUnseen } =
-      existingConversation.metrics;
 
     if (messages.length < 1) {
       return state;
     }
 
+    const { messagesByConversation, messagesLookup } = state;
+
+    const existingConversation = messagesByConversation[conversationId];
+    if (!existingConversation) {
+      return dropPreloadData(state);
+    }
+
+    let { newest, oldest, oldestUnseen, totalUnseen } =
+      existingConversation.metrics;
+
     const lookup = fromPairs(
       existingConversation.messageIds.map(id => [id, messagesLookup[id]])
     );