Use ttl_period from service messages as well.

Telegram/SourceFiles/history/history_item.cpp

@@ -809,6 +809,41 @@ bool HistoryItem::canUpdateDate() const {
 	return isScheduled();
 }
 
+void HistoryItem::applyTTL(const MTPDmessage &data) {
+	if (const auto period = data.vttl_period()) {
+		if (period->v > 0) {
+			applyTTL(data.vdate().v + period->v);
+		}
+	}
+}
+
+void HistoryItem::applyTTL(const MTPDmessageService &data) {
+	if (const auto period = data.vttl_period()) {
+		if (period->v > 0) {
+			applyTTL(data.vdate().v + period->v);
+		}
+	}
+}
+
+void HistoryItem::applyTTL(TimeId destroyAt) {
+	const auto previousDestroyAt = std::exchange(_ttlDestroyAt, destroyAt);
+	if (previousDestroyAt) {
+		history()->owner().unregisterMessageTTL(previousDestroyAt, this);
+	}
+	if (!_ttlDestroyAt) {
+		return;
+	} else if (base::unixtime::now() >= _ttlDestroyAt) {
+		const auto session = &history()->session();
+		crl::on_main(session, [session, id = fullId()]{
+			if (const auto item = session->data().message(id)) {
+				item->destroy();
+			}
+		});
+	} else {
+		history()->owner().registerMessageTTL(_ttlDestroyAt, this);
+	}
+}
+
 void HistoryItem::sendFailed() {
 	Expects(_clientFlags & MTPDmessage_ClientFlag::f_sending);
 	Expects(!(_clientFlags & MTPDmessage_ClientFlag::f_failed));
@@ -957,7 +992,9 @@ void HistoryItem::drawInDialog(
 	p.restoreTextPalette();
 }
 
-HistoryItem::~HistoryItem() = default;
+HistoryItem::~HistoryItem() {
+	applyTTL(0);
+}
 
 QDateTime ItemDateTime(not_null<const HistoryItem*> item) {
 	return base::unixtime::parse(item->date());

Telegram/SourceFiles/history/history_item.h

@@ -79,9 +79,6 @@ public:
 	[[nodiscard]] virtual bool notificationReady() const {
 		return true;
 	}
-	[[nodiscard]] virtual TimeId ttlDestroyAt() const {
-		return 0;
-	}
 	[[nodiscard]] PeerData *specialNotificationPeer() const;
 
 	[[nodiscard]] UserData *viaBot() const;
@@ -399,6 +396,10 @@ public:
 	void updateDate(TimeId newDate);
 	[[nodiscard]] bool canUpdateDate() const;
 
+	[[nodiscard]] TimeId ttlDestroyAt() const {
+		return _ttlDestroyAt;
+	}
+
 	virtual ~HistoryItem();
 
 	MsgId id;
@@ -427,6 +428,10 @@ protected:
 
 	void setGroupId(MessageGroupId groupId);
 
+	void applyTTL(const MTPDmessage &data);
+	void applyTTL(const MTPDmessageService &data);
+	void applyTTL(TimeId destroyAt);
+
 	Ui::Text::String _text = { st::msgMinWidth };
 	int _textWidth = -1;
 	int _textHeight = 0;
@@ -440,7 +445,9 @@ protected:
 	std::unique_ptr<Data::Media> _media;
 
 private:
+
 	TimeId _date = 0;
+	TimeId _ttlDestroyAt = 0;
 
 	HistoryView::Element *_mainView = nullptr;
 	friend class HistoryView::Element;

Telegram/SourceFiles/history/history_message.cpp

@@ -525,11 +525,7 @@ HistoryMessage::HistoryMessage(
 			MessageGroupId::FromRaw(history->peer->id, groupedId->v));
 	}
 
-	if (const auto period = data.vttl_period()) {
-		if (period->v > 0) {
-			applyTTL(data.vdate().v + period->v);
-		}
-	}
+	applyTTL(data);
 }
 
 HistoryMessage::HistoryMessage(
@@ -566,6 +562,8 @@ HistoryMessage::HistoryMessage(
 	}, [](const auto &) {
 		Unexpected("Service message action type in HistoryMessage.");
 	});
+
+	applyTTL(data);
 }
 
 HistoryMessage::HistoryMessage(
@@ -1403,25 +1401,6 @@ void HistoryMessage::applyEdition(const MTPDmessageService &message) {
 	}
 }
 
-void HistoryMessage::applyTTL(TimeId destroyAt) {
-	const auto previousDestroyAt = std::exchange(_ttlDestroyAt, destroyAt);
-	if (previousDestroyAt) {
-		history()->owner().unregisterMessageTTL(previousDestroyAt, this);
-	}
-	if (!_ttlDestroyAt) {
-		return;
-	} else if (base::unixtime::now() >= _ttlDestroyAt) {
-		const auto session = &history()->session();
-		crl::on_main(session, [session, id = fullId()]{
-			if (const auto item = session->data().message(id)) {
-				item->destroy();
-			}
-		});
-	} else {
-		history()->owner().registerMessageTTL(_ttlDestroyAt, this);
-	}
-}
-
 void HistoryMessage::updateSentContent(
 		const TextWithEntities &textWithEntities,
 		const MTPMessageMedia *media) {
@@ -1927,7 +1906,6 @@ std::unique_ptr<HistoryView::Element> HistoryMessage::createView(
 }
 
 HistoryMessage::~HistoryMessage() {
-	applyTTL(0);
 	_media.reset();
 	clearSavedMedia();
 	if (auto reply = Get<HistoryMessageReply>()) {

Telegram/SourceFiles/history/history_message.h

@@ -194,10 +194,6 @@ public:
 		const MTPDupdateShortSentMessage &data,
 		bool wasAlready) override;
 
-	[[nodiscard]] TimeId ttlDestroyAt() const override {
-		return _ttlDestroyAt;
-	}
-
 	// dynamic_cast optimization.
 	[[nodiscard]] HistoryMessage *toHistoryMessage() override {
 		return this;
@@ -250,8 +246,6 @@ private:
 		const TextWithEntities &textWithEntities) const;
 	void reapplyText();
 
-	void applyTTL(TimeId destroyAt);
-
 	[[nodiscard]] bool checkRepliesPts(const MTPMessageReplies &data) const;
 
 	QString _timeText;
@@ -259,8 +253,6 @@ private:
 
 	mutable int32 _fromNameVersion = 0;
 
-	TimeId _ttlDestroyAt = 0;
-
 	friend class HistoryView::Element;
 	friend class HistoryView::Message;
 

Telegram/SourceFiles/history/history_service.cpp

@@ -749,6 +749,7 @@ HistoryService::HistoryService(
 		data.vdate().v,
 		data.vfrom_id() ? peerFromMTP(*data.vfrom_id()) : PeerId(0)) {
 	createFromMtp(data);
+	applyTTL(data);
 }
 
 HistoryService::HistoryService(
@@ -763,6 +764,7 @@ HistoryService::HistoryService(
 		data.vdate().v,
 		data.vfrom_id() ? peerFromMTP(*data.vfrom_id()) : PeerId(0)) {
 	createFromMtp(data);
+	applyTTL(data);
 }
 
 HistoryService::HistoryService(

Telegram/SourceFiles/history/history_widget.cpp

@@ -3716,8 +3716,8 @@ bool HistoryWidget::isJoinChannel() const {
 
 bool HistoryWidget::isMuteUnmute() const {
 	return _peer
-		&& ((_peer->isBroadcast()
-			&& !_peer->asChannel()->canPublish())
+		&& ((_peer->isBroadcast() && !_peer->asChannel()->canPublish())
+			|| (_peer->isGigagroup() && !_peer->asChannel()->canWrite())
 			|| _peer->isRepliesChat());
 }