Allow hiding members list in groups.

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());
 		}
 	}