From 4896509ddf1bb473d1753a91a8bc377ab9b95bc7 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 15 Feb 2021 14:58:01 +0400
Subject: [PATCH] Allow clear history for everyone in small supergroups.

---
 Telegram/SourceFiles/boxes/confirm_box.cpp   | 2 --
 Telegram/SourceFiles/data/data_histories.cpp | 7 +++++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/Telegram/SourceFiles/boxes/confirm_box.cpp b/Telegram/SourceFiles/boxes/confirm_box.cpp
index 5d5982b4a..b2174236e 100644
--- a/Telegram/SourceFiles/boxes/confirm_box.cpp
+++ b/Telegram/SourceFiles/boxes/confirm_box.cpp
@@ -748,8 +748,6 @@ auto DeleteMessagesBox::revokeText(not_null<PeerData*> peer) const
 				tr::now,
 				lt_user,
 				user->firstName);
-		} else if (_wipeHistoryJustClear) {
-			return std::nullopt;
 		} else {
 			result.checkbox = tr::lng_delete_for_everyone_check(tr::now);
 		}
diff --git a/Telegram/SourceFiles/data/data_histories.cpp b/Telegram/SourceFiles/data/data_histories.cpp
index 5c7ccff83..47f388fd5 100644
--- a/Telegram/SourceFiles/data/data_histories.cpp
+++ b/Telegram/SourceFiles/data/data_histories.cpp
@@ -595,7 +595,7 @@ void Histories::deleteAllMessages(
 		};
 		const auto chat = peer->asChat();
 		const auto channel = peer->asChannel();
-		if (revoke && channel && channel->canDelete()) {
+		if (!justClear && revoke && channel && channel->canDelete()) {
 			return session().api().request(MTPchannels_DeleteChannel(
 				channel->inputChannel
 			)).done([=](const MTPUpdates &result) {
@@ -606,8 +606,11 @@ void Histories::deleteAllMessages(
 			//	}
 			}).send();
 		} else if (channel) {
+			const auto flags = revoke
+				? MTPchannels_DeleteHistory::Flag::f_for_everyone
+				: MTPchannels_DeleteHistory::Flag(0);
 			return session().api().request(MTPchannels_DeleteHistory(
-				MTP_flags(0),
+				MTP_flags(flags),
 				channel->inputChannel,
 				MTP_int(deleteTillId)
 			)).done([=](const MTPBool &result) {