Allow hiding members list in groups.

Telegram/CMakeLists.txt

@@ -184,6 +184,8 @@ PRIVATE
     boxes/peers/edit_forum_topic_box.h
     boxes/peers/edit_linked_chat_box.cpp
     boxes/peers/edit_linked_chat_box.h
+    boxes/peers/edit_members_visible.cpp
+    boxes/peers/edit_members_visible.h
     boxes/peers/edit_participant_box.cpp
     boxes/peers/edit_participant_box.h
     boxes/peers/edit_participants_box.cpp

Telegram/Resources/langs/lang.strings

@@ -1141,6 +1141,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_profile_set_group_photo" = "Set Photo";
 "lng_profile_add_participant" = "Add Members";
 "lng_profile_add_via_link" = "Invite via Link";
+"lng_profile_hide_participants" = "Hide Members";
+"lng_profile_hide_participants_about" = "Switch this on to hide the list of members in this group. Admins will remain visible.";
 "lng_profile_view_channel" = "View Channel";
 "lng_profile_view_discussion" = "View discussion";
 "lng_profile_join_channel" = "Join Channel";

Telegram/SourceFiles/boxes/peers/edit_members_visible.cpp

@@ -0,0 +1,61 @@
+/*
+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 "boxes/peers/edit_members_visible.h"
+
+#include "boxes/peers/edit_peer_info_box.h"
+#include "data/data_channel.h"
+#include "ui/rp_widget.h"
+#include "ui/wrap/vertical_layout.h"
+#include "ui/wrap/slide_wrap.h"
+#include "ui/widgets/buttons.h"
+#include "settings/settings_common.h"
+#include "main/main_session.h"
+#include "apiwrap.h"
+#include "lang/lang_keys.h"
+#include "styles/style_info.h"
+
+[[nodiscard]] object_ptr<Ui::RpWidget> CreateMembersVisibleButton(
+		not_null<ChannelData*> megagroup) {
+	auto result = object_ptr<Ui::VerticalLayout>((QWidget*)nullptr);
+	const auto container = result.data();
+
+	struct State {
+		rpl::event_stream<bool> toggled;
+	};
+	Settings::AddSkip(container);
+	const auto state = container->lifetime().make_state<State>();
+	const auto button = container->add(
+		EditPeerInfoBox::CreateButton(
+			container,
+			tr::lng_profile_hide_participants(),
+			rpl::single(QString()),
+			[] {},
+			st::manageGroupTopicsButton,
+			{ &st::infoRoundedIconAntiSpam, Settings::kIconPurple }
+	))->toggleOn(rpl::single(
+		(megagroup->flags() & ChannelDataFlag::ParticipantsHidden) != 0
+	) | rpl::then(state->toggled.events()));
+	Settings::AddSkip(container);
+	Settings::AddDividerText(
+		container,
+		tr::lng_profile_hide_participants_about());
+
+	button->toggledValue(
+	) | rpl::start_with_next([=](bool toggled) {
+		megagroup->session().api().request(
+			MTPchannels_ToggleParticipantsHidden(
+				megagroup->inputChannel,
+				MTP_bool(toggled)
+			)
+		).done([=](const MTPUpdates &result) {
+			megagroup->session().api().applyUpdates(result);
+		}).send();
+	}, button->lifetime());
+
+	return result;
+}

Telegram/SourceFiles/boxes/peers/edit_members_visible.h

@@ -0,0 +1,19 @@
+/*
+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
+*/
+#pragma once
+
+#include "base/object_ptr.h"
+
+class ChannelData;
+
+namespace Ui {
+class RpWidget;
+} // namespace Ui
+
+[[nodiscard]] object_ptr<Ui::RpWidget> CreateMembersVisibleButton(
+	not_null<ChannelData*> megagroup);

Telegram/SourceFiles/boxes/peers/edit_participants_box.cpp

@@ -12,6 +12,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "boxes/peers/edit_participant_box.h"
 #include "boxes/peers/add_participants_box.h"
 #include "boxes/peers/prepare_short_info_box.h" // PrepareShortInfoBox
+#include "boxes/peers/edit_members_visible.h"
 #include "ui/boxes/confirm_box.h"
 #include "boxes/max_invite_box.h"
 #include "boxes/add_contact_box.h"
@@ -1188,11 +1189,14 @@ void ParticipantsBoxController::prepare() {
 		Unexpected("Role in ParticipantsBoxController::prepare()");
 	}();
 	if (const auto megagroup = _peer->asMegagroup()) {
-		if ((_role == Role::Admins)
+		if ((_role == Role::Members) && megagroup->canBanMembers()) {
+			delegate()->peerListSetAboveWidget(CreateMembersVisibleButton(
+				megagroup));
+		} else if ((_role == Role::Admins)
 			&& (megagroup->amCreator() || megagroup->hasAdminRights())) {
 			const auto validator = AntiSpamMenu::AntiSpamValidator(
 				_navigation->parentController(),
-				_peer->asChannel());
+				megagroup);
 			delegate()->peerListSetAboveWidget(validator.createButton());
 		}
 	}

Telegram/SourceFiles/data/data_channel.cpp

@@ -577,7 +577,10 @@ bool ChannelData::allowsForwarding() const {
 }
 
 bool ChannelData::canViewMembers() const {
-	return flags() & Flag::CanViewParticipants;
+	return (flags() & Flag::CanViewParticipants)
+		&& (!(flags() & Flag::ParticipantsHidden)
+			|| amCreator()
+			|| hasAdminRights());
 }
 
 bool ChannelData::canViewAdmins() const {
@@ -944,14 +947,20 @@ void ApplyChannelUpdate(
 		| Flag::CanSetStickers
 		| Flag::PreHistoryHidden
 		| Flag::AntiSpam
-		| Flag::Location;
+		| Flag::Location
+		| Flag::ParticipantsHidden;
 	channel->setFlags((channel->flags() & ~mask)
 		| (update.is_can_set_username() ? Flag::CanSetUsername : Flag())
-		| (update.is_can_view_participants() ? Flag::CanViewParticipants : Flag())
+		| (update.is_can_view_participants()
+			? Flag::CanViewParticipants
+			: Flag())
 		| (update.is_can_set_stickers() ? Flag::CanSetStickers : Flag())
 		| (update.is_hidden_prehistory() ? Flag::PreHistoryHidden : Flag())
 		| (update.is_antispam() ? Flag::AntiSpam : Flag())
-		| (update.vlocation() ? Flag::Location : Flag()));
+		| (update.vlocation() ? Flag::Location : Flag())
+		| (update.is_participants_hidden()
+			? Flag::ParticipantsHidden
+			: Flag()));
 	channel->setUserpicPhoto(update.vchat_photo());
 	if (const auto migratedFrom = update.vmigrated_from_chat_id()) {
 		channel->addFlags(Flag::Megagroup);

Telegram/SourceFiles/data/data_channel.h

@@ -58,6 +58,7 @@ enum class ChannelDataFlag {
 	RequestToJoin = (1 << 22),
 	Forum = (1 << 23),
 	AntiSpam = (1 << 24),
+	ParticipantsHidden = (1 << 25),
 };
 inline constexpr bool is_flag_type(ChannelDataFlag) { return true; };
 using ChannelDataFlags = base::flags<ChannelDataFlag>;

Telegram/SourceFiles/info/profile/info_profile_actions.cpp

@@ -929,9 +929,12 @@ void ActionsFiller::addBlockAction(not_null<UserData*> user) {
 
 void ActionsFiller::addLeaveChannelAction(not_null<ChannelData*> channel) {
 	Expects(_controller->parentController());
+
 	AddActionButton(
 		_wrap,
-		tr::lng_profile_leave_channel(),
+		(channel->isMegagroup()
+			? tr::lng_profile_leave_group()
+			: tr::lng_profile_leave_channel()),
 		AmInChannelValue(channel),
 		Window::DeleteAndLeaveHandler(
 			_controller->parentController(),
@@ -947,7 +950,9 @@ void ActionsFiller::addJoinChannelAction(
 		| rpl::start_spawning(_wrap->lifetime());
 	AddActionButton(
 		_wrap,
-		tr::lng_profile_join_channel(),
+		(channel->isMegagroup()
+			? tr::lng_profile_join_group()
+			: tr::lng_profile_join_channel()),
 		rpl::duplicate(joinVisible),
 		[=] { channel->session().api().joinChannel(channel); },
 		&st::infoIconAddMember);
@@ -998,7 +1003,14 @@ void ActionsFiller::fillChannelActions(
 }
 
 object_ptr<Ui::RpWidget> ActionsFiller::fill() {
-	auto wrapResult = [=](auto &&callback) {
+	const auto wrapToggled = [=](
+			object_ptr<Ui::RpWidget> content,
+			rpl::producer<bool> shown) {
+		auto result = object_ptr<Ui::SlideWrap<>>(_parent, std::move(content));
+		result->setDuration(0)->toggleOn(std::move(shown));
+		return result;
+	};
+	const auto wrapResult = [=](auto &&callback) {
 		_wrap = object_ptr<Ui::VerticalLayout>(_parent);
 		_wrap->add(CreateSkipWidget(_wrap));
 		callback();
@@ -1010,8 +1022,11 @@ object_ptr<Ui::RpWidget> ActionsFiller::fill() {
 			fillUserActions(user);
 		});
 	} else if (auto channel = _peer->asChannel()) {
-		if (channel->isMegagroup()) {
-			return { nullptr };
+		if (const auto megagroup = channel->asMegagroup()) {
+			using namespace rpl::mappers;
+			return wrapToggled(wrapResult([=] {
+				fillChannelActions(megagroup);
+			}), CanViewParticipantsValue(megagroup) | rpl::map(!_1));
 		}
 		return wrapResult([=] {
 			fillChannelActions(channel);

Telegram/SourceFiles/info/profile/info_profile_cover.cpp

@@ -359,12 +359,7 @@ void Cover::setupChildGeometry() {
 }
 
 Cover *Cover::setOnlineCount(rpl::producer<int> &&count) {
-	std::move(
-		count
-	) | rpl::start_with_next([this](int count) {
-		_onlineCount = count;
-		refreshStatusText();
-	}, lifetime());
+	_onlineCount = std::move(count);
 	return this;
 }
 
@@ -377,18 +372,21 @@ void Cover::initViewers(rpl::producer<QString> title) {
 		refreshNameGeometry(width());
 	}, lifetime());
 
-	_peer->session().changes().peerFlagsValue(
-		_peer,
-		Flag::OnlineStatus | Flag::Members
-	) | rpl::start_with_next(
-		[=] { refreshStatusText(); },
-		lifetime());
+	rpl::combine(
+		_peer->session().changes().peerFlagsValue(
+			_peer,
+			Flag::OnlineStatus | Flag::Members),
+		_onlineCount.value()
+	) | rpl::start_with_next([=] {
+		refreshStatusText();
+	}, lifetime());
+
 	_peer->session().changes().peerFlagsValue(
 		_peer,
 		(_peer->isUser() ? Flag::IsContact : Flag::Rights)
-	) | rpl::start_with_next(
-		[=] { refreshUploadPhotoOverlay(); },
-		lifetime());
+	) | rpl::start_with_next([=] {
+		refreshUploadPhotoOverlay();
+	}, lifetime());
 }
 
 void Cover::refreshUploadPhotoOverlay() {
@@ -451,15 +449,17 @@ void Cover::refreshStatusText() {
 			if (!chat->amIn()) {
 				return tr::lng_chat_status_unaccessible({}, WithEntities);
 			}
-			auto fullCount = std::max(
+			const auto onlineCount = _onlineCount.current();
+			const auto fullCount = std::max(
 				chat->count,
 				int(chat->participants.size()));
-			return { .text = ChatStatusText(fullCount, _onlineCount, true) };
+			return { .text = ChatStatusText(fullCount, onlineCount, true) };
 		} else if (auto channel = _peer->asChannel()) {
-			auto fullCount = qMax(channel->membersCount(), 1);
+			const auto onlineCount = _onlineCount.current();
+			const auto fullCount = qMax(channel->membersCount(), 1);
 			auto result = ChatStatusText(
 				fullCount,
-				_onlineCount,
+				onlineCount,
 				channel->isMegagroup());
 			return hasMembersLink
 				? PlainLink(result)

Telegram/SourceFiles/info/profile/info_profile_cover.h

@@ -131,7 +131,7 @@ private:
 	const not_null<PeerData*> _peer;
 	const std::unique_ptr<EmojiStatusPanel> _emojiStatusPanel;
 	const std::unique_ptr<Badge> _badge;
-	int _onlineCount = 0;
+	rpl::variable<int> _onlineCount;
 
 	object_ptr<Ui::UserpicButton> _userpic;
 	object_ptr<TopicIconButton> _iconButton;

Telegram/SourceFiles/info/profile/info_profile_inner_widget.cpp

@@ -7,9 +7,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "info/profile/info_profile_inner_widget.h"
 
-#include <rpl/combine.h>
-#include <rpl/combine_previous.h>
-#include <rpl/flatten_latest.h>
 #include "info/info_memento.h"
 #include "info/info_controller.h"
 #include "info/profile/info_profile_widget.h"
@@ -31,8 +28,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "window/window_session_controller.h"
 #include "storage/storage_shared_media.h"
 #include "lang/lang_keys.h"
-#include "styles/style_info.h"
-#include "styles/style_boxes.h"
 #include "ui/widgets/buttons.h"
 #include "ui/widgets/checkbox.h"
 #include "ui/widgets/scroll_area.h"
@@ -40,7 +35,10 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/widgets/box_content_divider.h"
 #include "ui/wrap/slide_wrap.h"
 #include "ui/wrap/vertical_layout.h"
+#include "data/data_channel.h"
 #include "data/data_shared_media.h"
+#include "styles/style_info.h"
+#include "styles/style_boxes.h"
 
 namespace Info {
 namespace Profile {
@@ -102,27 +100,42 @@ object_ptr<Ui::RpWidget> InnerWidget::setupContent(
 		result->add(std::move(actions));
 	}
 
-	if (_peer->isChat() || _peer->isMegagroup()) {
-		_members = result->add(object_ptr<Members>(
-			result,
-			_controller));
-		_members->scrollToRequests(
-		) | rpl::start_with_next([this](Ui::ScrollToRequest request) {
-			auto min = (request.ymin < 0)
-				? request.ymin
-				: MapFrom(this, _members, QPoint(0, request.ymin)).y();
-			auto max = (request.ymin < 0)
-				? MapFrom(this, _members, QPoint()).y()
-				: (request.ymax < 0)
-				? request.ymax
-				: MapFrom(this, _members, QPoint(0, request.ymax)).y();
-			_scrollToRequests.fire({ min, max });
-		}, _members->lifetime());
-		_cover->setOnlineCount(_members->onlineCountValue());
+	if (_peer->isChat()) {
+		setupMembers(result.data());
+	} else if (const auto megagroup = _peer->asMegagroup()) {
+		CanViewParticipantsValue(
+			megagroup
+		) | rpl::start_with_next([=, raw = result.data()](bool can) {
+			if (can) {
+				setupMembers(raw);
+			} else {
+				_cover->setOnlineCount(rpl::single(0));
+				delete base::take(_members);
+			}
+		}, lifetime());
 	}
 	return result;
 }
 
+void InnerWidget::setupMembers(not_null<Ui::VerticalLayout*> container) {
+	_members = container->add(object_ptr<Members>(
+		container,
+		_controller));
+	_members->scrollToRequests(
+	) | rpl::start_with_next([this](Ui::ScrollToRequest request) {
+		auto min = (request.ymin < 0)
+			? request.ymin
+			: MapFrom(this, _members, QPoint(0, request.ymin)).y();
+		auto max = (request.ymin < 0)
+			? MapFrom(this, _members, QPoint()).y()
+			: (request.ymax < 0)
+			? request.ymax
+			: MapFrom(this, _members, QPoint(0, request.ymax)).y();
+		_scrollToRequests.fire({ min, max });
+	}, _members->lifetime());
+	_cover->setOnlineCount(_members->onlineCountValue());
+}
+
 object_ptr<Ui::RpWidget> InnerWidget::setupSharedMedia(
 		not_null<RpWidget*> parent) {
 	using namespace rpl::mappers;

Telegram/SourceFiles/info/profile/info_profile_inner_widget.h

@@ -58,6 +58,7 @@ protected:
 private:
 	object_ptr<RpWidget> setupContent(not_null<RpWidget*> parent);
 	object_ptr<RpWidget> setupSharedMedia(not_null<RpWidget*> parent);
+	void setupMembers(not_null<Ui::VerticalLayout*> container);
 
 	int countDesiredHeight() const;
 	void updateDesiredHeight() {

Telegram/SourceFiles/info/profile/info_profile_values.cpp

@@ -549,6 +549,20 @@ rpl::producer<int> FullReactionsCountValue(
 	}) | rpl::distinct_until_changed();
 }
 
+rpl::producer<bool> CanViewParticipantsValue(
+		not_null<ChannelData*> megagroup) {
+	if (megagroup->amCreator()) {
+		return rpl::single(true);
+	}
+	return rpl::combine(
+		megagroup->session().changes().peerFlagsValue(
+			megagroup,
+			UpdateFlag::Rights),
+		megagroup->flagsValue(),
+		[=] { return megagroup->canViewMembers(); }
+	) | rpl::distinct_until_changed();
+}
+
 template <typename Flag, typename Peer>
 rpl::producer<BadgeType> BadgeValueFromFlags(Peer peer) {
 	return rpl::combine(

Telegram/SourceFiles/info/profile/info_profile_values.h

@@ -106,6 +106,8 @@ rpl::producer<not_null<PeerData*>> MigratedOrMeValue(
 	not_null<PeerData*> peer);
 [[nodiscard]] rpl::producer<int> FullReactionsCountValue(
 	not_null<Main::Session*> peer);
+[[nodiscard]] rpl::producer<bool> CanViewParticipantsValue(
+	not_null<ChannelData*> megagroup);
 
 enum class BadgeType;
 [[nodiscard]] rpl::producer<BadgeType> BadgeValue(not_null<PeerData*> peer);