Implement forwarding to topics.

Telegram/SourceFiles/api/api_common.cpp

@@ -0,0 +1,22 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "api/api_common.h"
+
+#include "data/data_thread.h"
+
+namespace Api {
+
+SendAction::SendAction(
+	not_null<Data::Thread*> thread,
+	SendOptions options)
+: history(thread->owningHistory())
+, options(options)
+, topicRootId(thread->topicRootId()) {
+}
+
+} // namespace Api