From 72807c52b7890ee3cb2ee33e2ba9eacd38ea86ff Mon Sep 17 00:00:00 2001
From: Ryan ZHAO <ryanzhaors@qq.com>
Date: Mon, 19 Apr 2021 09:38:47 +1000
Subject: [PATCH] fix open group message timestamp

---
 SessionMessagingKit/Messages/Signal/TSInteraction.m | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/SessionMessagingKit/Messages/Signal/TSInteraction.m b/SessionMessagingKit/Messages/Signal/TSInteraction.m
index d71496f1b..15415de82 100644
--- a/SessionMessagingKit/Messages/Signal/TSInteraction.m
+++ b/SessionMessagingKit/Messages/Signal/TSInteraction.m
@@ -170,7 +170,9 @@ NSString *NSStringFromOWSInteractionType(OWSInteractionType value)
 - (uint64_t)timestampForUI
 {
     if ([self isKindOfClass:TSIncomingMessage.class] && ((TSIncomingMessage *) self).isOpenGroupMessage) {
-        return ((TSIncomingMessage *) self).serverTimestamp.unsignedLongLongValue;
+        if (((TSIncomingMessage *) self).serverTimestamp)
+            return ((TSIncomingMessage *) self).serverTimestamp.unsignedLongLongValue;
+        return ((TSIncomingMessage *) self).receivedAtTimestamp;
     }
     return _timestamp;
 }
@@ -182,7 +184,7 @@ NSString *NSStringFromOWSInteractionType(OWSInteractionType value)
 
 - (NSDate *)receivedAtDate
 {
-    if ([self isKindOfClass:TSIncomingMessage.class] && ((TSIncomingMessage *) self).isOpenGroupMessage) {
+    if ([self isKindOfClass:TSIncomingMessage.class] && ((TSIncomingMessage *) self).isOpenGroupMessage && ((TSIncomingMessage *) self).serverTimestamp != nil) {
         return [NSDate ows_dateWithMillisecondsSince1970:((TSIncomingMessage *) self).serverTimestamp.unsignedLongLongValue];
     }
     return [NSDate ows_dateWithMillisecondsSince1970:self.receivedAtTimestamp];