From 41a630897394dff3612bc4c7b17ae302f67d5964 Mon Sep 17 00:00:00 2001
From: Ryan ZHAO <ryanzhaors@qq.com>
Date: Mon, 17 Feb 2020 10:04:17 +1100
Subject: [PATCH] hide input tool bar on linked device after leaving a closed
 group

---
 SignalServiceKit/src/Contacts/Threads/TSGroupThread.m | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/SignalServiceKit/src/Contacts/Threads/TSGroupThread.m b/SignalServiceKit/src/Contacts/Threads/TSGroupThread.m
index 31f7cfaeb..5cd6125be 100644
--- a/SignalServiceKit/src/Contacts/Threads/TSGroupThread.m
+++ b/SignalServiceKit/src/Contacts/Threads/TSGroupThread.m
@@ -227,10 +227,13 @@ NSString *const TSGroupThread_NotificationKey_UniqueId = @"TSGroupThread_Notific
 
 - (void)leaveGroupWithTransaction:(YapDatabaseReadWriteTransaction *)transaction
 {
-    NSMutableArray<NSString *> *newGroupMemberIds = [self.groupModel.groupMemberIds mutableCopy];
-    [newGroupMemberIds removeObject:[TSAccountManager localNumber]];
-
-    self.groupModel.groupMemberIds = newGroupMemberIds;
+    NSMutableSet<NSString *> *newGroupMemberIds = [NSMutableSet setWithArray:self.groupModel.groupMemberIds];
+    NSString *userHexEncodedPublicKey = TSAccountManager.localNumber;
+    if (userHexEncodedPublicKey != nil) {
+        NSSet<NSString *> *linkedDeviceHexEncodedPublicKeys = [LKDatabaseUtilities getLinkedDeviceHexEncodedPublicKeysFor:userHexEncodedPublicKey in:transaction];
+        [newGroupMemberIds minusSet:linkedDeviceHexEncodedPublicKeys];
+    }
+    self.groupModel.groupMemberIds = newGroupMemberIds.allObjects;
     [self saveWithTransaction:transaction];
 }