From 977dee3599c601063960e58a7cf2ea169aac4a0d Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 18 Dec 2017 17:29:48 +0400
Subject: [PATCH] Fix fast sharing from channels.

Grouped flag is only allowed for grouped media in forward requests.

Fixes #4198.
---
 Telegram/SourceFiles/history/history_message.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/Telegram/SourceFiles/history/history_message.cpp b/Telegram/SourceFiles/history/history_message.cpp
index 1ed848262..3f1066095 100644
--- a/Telegram/SourceFiles/history/history_message.cpp
+++ b/Telegram/SourceFiles/history/history_message.cpp
@@ -196,6 +196,7 @@ void FastShareMessage(not_null<HistoryItem*> item) {
 		}
 		return MessageIdsList(1, item->fullId());
 	}());
+	const auto isGroup = (item->getFullGroup() != nullptr);
 	const auto isGame = item->getMessageBot()
 		&& item->getMedia()
 		&& (item->getMedia()->type() == MediaTypeGame);
@@ -222,7 +223,7 @@ void FastShareMessage(not_null<HistoryItem*> item) {
 			}
 		}
 	};
-	auto submitCallback = [data](const QVector<PeerData*> &result) {
+	auto submitCallback = [data, isGroup](const QVector<PeerData*> &result) {
 		if (!data->requests.empty()) {
 			return; // Share clicked already.
 		}
@@ -263,8 +264,11 @@ void FastShareMessage(not_null<HistoryItem*> item) {
 			}
 		};
 
-		auto sendFlags = MTPmessages_ForwardMessages::Flag::f_with_my_score
-			| MTPmessages_ForwardMessages::Flag::f_grouped;
+		const auto sendFlags = MTPmessages_ForwardMessages::Flag(0)
+			| MTPmessages_ForwardMessages::Flag::f_with_my_score
+			| (isGroup
+				? MTPmessages_ForwardMessages::Flag::f_grouped
+				: MTPmessages_ForwardMessages::Flag(0));
 		auto msgIds = QVector<MTPint>();
 		msgIds.reserve(data->msgIds.size());
 		for (const auto fullId : data->msgIds) {