From 8acd47bf2f31f8e19155cd4501dcacd491129b81 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Wed, 20 Mar 2019 13:22:58 +0400
Subject: [PATCH] Fix pre-history visibility rights check.

---
 Telegram/SourceFiles/data/data_channel.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Telegram/SourceFiles/data/data_channel.cpp b/Telegram/SourceFiles/data/data_channel.cpp
index ce3605b2b..afb14447a 100644
--- a/Telegram/SourceFiles/data/data_channel.cpp
+++ b/Telegram/SourceFiles/data/data_channel.cpp
@@ -394,12 +394,12 @@ bool ChannelData::canEditPermissions() const {
 }
 
 bool ChannelData::canEditSignatures() const {
-	return canEditInformation();
+	return isChannel() && canEditInformation();
 }
 
 bool ChannelData::canEditPreHistoryHidden() const {
-	return canEditInformation()
-		&& isMegagroup()
+	return isMegagroup()
+		&& ((adminRights() & AdminRight::f_ban_users) || amCreator())
 		&& (!isPublic() || canEditUsername());
 }