Handle disabling direct messages in channel.

Telegram/SourceFiles/data/data_channel.cpp

@@ -337,7 +337,18 @@ bool ChannelData::discussionLinkKnown() const {
 }
 
 void ChannelData::setMonoforumLink(ChannelData *link) {
-	if (_monoforumLink || !link) {
+	if (_monoforumLink) {
+		if (isBroadcast()) {
+			_monoforumLink->setMonoforumLink(link ? this : nullptr);
+		} else if (isMonoforum()) {
+			if (!link && !monoforumDisabled()) {
+				setFlags(flags() | Flag::MonoforumDisabled);
+			} else if (link && monoforumDisabled()) {
+				setFlags(flags() & ~Flag::MonoforumDisabled);
+			}
+		}
+		return;
+	} else if (!link) {
 		return;
 	}
 	_monoforumLink = link;
@@ -352,6 +363,10 @@ ChannelData *ChannelData::monoforumLink() const {
 	return _monoforumLink;
 }
 
+bool ChannelData::monoforumDisabled() const {
+	return flags() & Flag::MonoforumDisabled;
+}
+
 void ChannelData::setMembersCount(int newMembersCount) {
 	if (_membersCount != newMembersCount) {
 		if (isMegagroup()

Telegram/SourceFiles/data/data_channel.h

@@ -81,6 +81,7 @@ enum class ChannelDataFlag : uint64 {
 	AutoTranslation = (1ULL << 38),
 	Monoforum = (1ULL << 39),
 	MonoforumAdmin = (1ULL << 40),
+	MonoforumDisabled = (1ULL << 41),
 	ForumTabs = (1ULL << 41),
 };
 inline constexpr bool is_flag_type(ChannelDataFlag) { return true; };
@@ -432,6 +433,7 @@ public:
 
 	void setMonoforumLink(ChannelData *link);
 	[[nodiscard]] ChannelData *monoforumLink() const;
+	[[nodiscard]] bool monoforumDisabled() const;
 
 	void ptsInit(int32 pts) {
 		_ptsWaiter.init(pts);

Telegram/SourceFiles/data/data_chat_participant_status.cpp

@@ -156,6 +156,9 @@ bool CanSendAnyOf(
 		}
 		return false;
 	} else if (const auto channel = peer->asChannel()) {
+		if (channel->monoforumDisabled()) {
+			return false;
+		}
 		using Flag = ChannelDataFlag;
 		const auto allowed = channel->amIn()
 			|| ((channel->flags() & Flag::HasLink)
@@ -221,6 +224,9 @@ SendError RestrictionError(
 		}
 		const auto all = restricted.isWithEveryone();
 		const auto channel = peer->asChannel();
+		if (channel && channel->monoforumDisabled()) {
+			return tr::lng_action_direct_messages_disabled(tr::now);
+		}
 		if (!all && channel) {
 			auto restrictedUntil = channel->restrictedUntil();
 			if (restrictedUntil > 0

Telegram/SourceFiles/data/data_peer.cpp

@@ -1542,6 +1542,9 @@ Data::RestrictionCheckResult PeerData::amRestricted(
 				: Result::Explicit())
 			: Result::Allowed();
 	} else if (const auto channel = asChannel()) {
+		if (channel->monoforumDisabled()) {
+			return Result::WithEveryone();
+		}
 		const auto defaultRestrictions = channel->defaultRestrictions()
 			| (channel->isPublic()
 				? (ChatRestriction::PinMessages

Telegram/SourceFiles/data/data_peer_values.cpp

@@ -273,7 +273,8 @@ inline auto DefaultRestrictionValue(
 			| Flag::HasLink
 			| Flag::Forbidden
 			| Flag::Creator
-			| Flag::Broadcast;
+			| Flag::Broadcast
+			| Flag::MonoforumDisabled;
 		return rpl::combine(
 			PeerFlagsValue(channel, mask),
 			AdminRightValue(
@@ -288,6 +289,9 @@ inline auto DefaultRestrictionValue(
 					bool unrestrictedByBoosts,
 					ChatRestrictions sendRestriction,
 					ChatRestrictions defaultSendRestriction) {
+				if (flags & Flag::MonoforumDisabled) {
+					return false;
+				}
 				const auto notAmInFlags = Flag::Left | Flag::Forbidden;
 				const auto forumRestriction = forbidInForums
 					&& (flags & Flag::Forum);

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -527,7 +527,13 @@ InnerWidget::InnerWidget(
 			RowDescriptor previous,
 			RowDescriptor next) {
 		updateDialogRow(previous);
+		if (const auto sublist = previous.key.sublist()) {
+			updateDialogRow({ { sublist->owningHistory() }, {} });
+		}
 		updateDialogRow(next);
+		if (const auto sublist = next.key.sublist()) {
+			updateDialogRow({ { sublist->owningHistory() }, {} });
+		}
 	}, lifetime());
 
 	_controller->activeChatsFilter(

Telegram/SourceFiles/history/history_widget.cpp

@@ -1067,9 +1067,20 @@ void HistoryWidget::refreshDirectMessageShown() {
 		return;
 	}
 	const auto channel = _peer->asChannel();
-	_directMessage->setVisible(channel
-		&& channel->isBroadcast()
-		&& channel->monoforumLink());
+	const auto monoforum = channel ? channel->broadcastMonoforum() : nullptr;
+	const auto visible = monoforum && !monoforum->monoforumDisabled();
+	_directMessage->setVisible(visible);
+	if (visible) {
+		using Flags = Data::Flags<ChannelDataFlags>;
+		_directMessageLifetime = monoforum->flagsValue(
+		) | rpl::skip(
+			1
+		) | rpl::start_with_next([=](Flags::Change change) {
+			if (change.diff & ChannelDataFlag::MonoforumDisabled) {
+				refreshDirectMessageShown();
+			}
+		});
+	}
 }
 
 void HistoryWidget::refreshTopBarActiveChat() {
@@ -2624,13 +2635,19 @@ void HistoryWidget::showHistory(
 		if (const auto channel = _peer->asChannel()) {
 			channel->updateFull();
 			if (!channel->isBroadcast()) {
-				channel->flagsValue(
-				) | rpl::start_with_next([=] {
+				using Flags = Data::Flags<ChannelDataFlags>;
+				channel->flagsValue() | rpl::skip(
+					1
+				) | rpl::start_with_next([=](Flags::Change change) {
 					refreshJoinChannelText();
+					if (change.diff & ChannelDataFlag::MonoforumDisabled) {
+						updateCanSendMessage();
+						updateSendRestriction();
+						updateHistoryGeometry();
+					}
 				}, _list->lifetime());
-			} else {
-				refreshJoinChannelText();
 			}
+			refreshJoinChannelText();
 		}
 
 		controller()->adaptive().changes(
@@ -6645,7 +6662,9 @@ int HistoryWidget::countAutomaticScrollTop() {
 }
 
 Data::SendError HistoryWidget::computeSendRestriction() const {
-	if (!_canSendMessages && _peer->amMonoforumAdmin()) {
+	if (!_canSendMessages
+		&& _peer->amMonoforumAdmin()
+		&& !_peer->asChannel()->monoforumDisabled()) {
 		return Data::SendError({
 			.text = tr::lng_monoforum_choose_to_reply(tr::now),
 			.monoforumAdmin = true,

Telegram/SourceFiles/history/history_widget.h

@@ -807,6 +807,7 @@ private:
 	object_ptr<Ui::FlatButton> _muteUnmute;
 	QPointer<Ui::IconButton> _giftToChannel;
 	QPointer<Ui::IconButton> _directMessage;
+	rpl::lifetime _directMessageLifetime;
 	object_ptr<Ui::FlatButton> _reportMessages;
 	struct {
 		object_ptr<Ui::RoundButton> button = { nullptr };