chore(fc): use last message to drive lastActivity for sorting rooms

Signed-off-by: Brandon McAnsh <[email protected]>

Author: bmc08gt

services/flipchat/chat/src/main/kotlin/xyz/flipchat/services/internal/db/ConversationDao.kt

@@ -44,8 +44,9 @@ interface ConversationDao {
         return getPagedConversationsWithMembers(limit, offset)
             .map {
                 val lastMessage = getLastMessage(it.conversation.id)
+                val timestamp = lastMessage?.dateMillis ?: it.conversation.lastActivity
                 ConversationWithMembersAndLastMessage(
-                    conversation = it.conversation,
+                    conversation = it.conversation.copy(lastActivity = timestamp),
                     members = it.members,
                     lastMessage = lastMessage
                 )