Add recording start/stop to Settings.

Telegram/Resources/langs/lang.strings

@@ -2000,6 +2000,13 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_group_call_recording_stop" = "Stop recording";
 "lng_group_call_recording_started" = "Voice chat recording started.";
 "lng_group_call_recording_stopped" = "Voice chat recording stopped.";
+"lng_group_call_recording_start_sure" = "Do you want to start recording this chat and save the result into an audio file?\n\nOther members will see the chat is being recorded.";
+"lng_group_call_recording_stop_sure" = "Do you want to stop recording this chat?";
+"lng_group_call_recording_start_field" = "Recording Title";
+"lng_group_call_recording_start_button" = "Start";
+"lng_group_call_is_recorded" = "Voice chat is being recorded";
+"lng_group_call_can_speak_here" = "You can now speak.";
+"lng_group_call_can_speak" = "You can now speak in **{chat}**.";
 
 "lng_no_mic_permission" = "Telegram needs access to your microphone so that you can make calls and record voice messages.";
 

Telegram/SourceFiles/calls/calls_group_call.cpp

@@ -876,6 +876,29 @@ void GroupCall::changeTitle(const QString &title) {
 	}).send();
 }
 
+void GroupCall::toggleRecording(bool enabled, const QString &title) {
+	const auto real = _peer->groupCall();
+	if (!real || real->id() != _id) {
+		return;
+	}
+
+	const auto already = (real->recordStartDate() != 0);
+	if (already == enabled) {
+		return;
+	}
+
+	using Flag = MTPphone_ToggleGroupCallRecord::Flag;
+	_api.request(MTPphone_ToggleGroupCallRecord(
+		MTP_flags((enabled ? Flag::f_start : Flag(0))
+			| (title.isEmpty() ? Flag(0) : Flag::f_title)),
+		inputCall(),
+		MTP_string(title)
+	)).done([=](const MTPUpdates &result) {
+		_peer->session().api().applyUpdates(result);
+	}).fail([=](const RPCError &error) {
+	}).send();
+}
+
 void GroupCall::ensureControllerCreated() {
 	if (_instance) {
 		return;

Telegram/SourceFiles/calls/calls_group_call.h

@@ -119,6 +119,7 @@ public:
 	void handleUpdate(const MTPGroupCall &call);
 	void handleUpdate(const MTPDupdateGroupCallParticipants &data);
 	void changeTitle(const QString &title);
+	void toggleRecording(bool enabled, const QString &title);
 
 	void setMuted(MuteState mute);
 	void setMutedAndUpdate(MuteState mute);

Telegram/SourceFiles/calls/calls_group_settings.cpp

@@ -24,6 +24,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "base/event_filter.h"
 #include "base/global_shortcuts.h"
 #include "base/platform/base_platform_info.h"
+#include "base/unixtime.h"
 #include "data/data_channel.h"
 #include "data/data_chat.h"
 #include "data/data_group_call.h"
@@ -100,13 +101,66 @@ void EditGroupCallTitleBox(
 		input->setFocusFast();
 	});
 	box->addButton(tr::lng_settings_save(), [=] {
-		const auto result = input->getLastText();
+		const auto result = input->getLastText().trimmed();
 		box->closeBox();
 		done(result);
 	});
 	box->addButton(tr::lng_cancel(), [=] { box->closeBox(); });
 }
 
+void StartGroupCallRecordingBox(
+		not_null<Ui::GenericBox*> box,
+		const QString &title,
+		Fn<void(QString)> done) {
+	box->setTitle(tr::lng_group_call_recording_start());
+
+	box->addRow(
+		object_ptr<Ui::FlatLabel>(
+			box.get(),
+			tr::lng_group_call_recording_start_sure(),
+			st::groupCallBoxLabel));
+
+	const auto input = box->addRow(object_ptr<Ui::InputField>(
+		box,
+		st::groupCallField,
+		tr::lng_group_call_recording_start_field(),
+		title));
+	box->setFocusCallback([=] {
+		input->setFocusFast();
+	});
+	box->addButton(tr::lng_group_call_recording_start_button(), [=] {
+		const auto result = input->getLastText().trimmed();
+		if (result.isEmpty()) {
+			input->showError();
+			return;
+		}
+		box->closeBox();
+		done(result);
+	});
+	box->addButton(tr::lng_cancel(), [=] { box->closeBox(); });
+}
+
+void StopGroupCallRecordingBox(
+		not_null<Ui::GenericBox*> box,
+		Fn<void(QString)> done) {
+	box->addRow(
+		object_ptr<Ui::FlatLabel>(
+			box.get(),
+			tr::lng_group_call_recording_stop_sure(),
+			st::groupCallBoxLabel),
+		style::margins(
+			st::boxRowPadding.left(),
+			st::boxPadding.top(),
+			st::boxRowPadding.right(),
+			st::boxPadding.bottom()));
+
+	box->addButton(tr::lng_box_ok(), [=] {
+		box->closeBox();
+		done(QString());
+	});
+	box->addButton(tr::lng_cancel(), [=] { box->closeBox(); });
+}
+
 } // namespace
 
 void GroupCallSettingsBox(
@@ -141,8 +195,9 @@ void GroupCallSettingsBox(
 	const auto joinMuted = goodReal ? real->joinMuted() : false;
 	const auto canChangeJoinMuted = (goodReal && real->canChangeJoinMuted());
 	const auto addCheck = (peer->canManageGroupCall() && canChangeJoinMuted);
-	const auto addEditJoinAs = (call->possibleJoinAs().size() > 1);
-	const auto addEditTitle = peer->canManageGroupCall();
+	const auto addEditJoinAs = (call->possibleJoinAs().size() > 1); // #TODO calls when to show
+	const auto addEditTitle = peer->canManageGroupCall() && goodReal;
+	const auto addEditRecording = peer->canManageGroupCall() && goodReal;
 	if (addCheck || addEditJoinAs) {
 		AddSkip(layout);
 	}
@@ -152,12 +207,44 @@ void GroupCallSettingsBox(
 			tr::lng_group_call_display_as_header(),
 			st::groupCallSettingsButton).get()
 		: nullptr;
-	const auto editTitle = (goodReal && addEditTitle)
+	const auto editTitle = addEditTitle
 		? AddButton(
 			layout,
 			tr::lng_group_call_edit_title(),
 			st::groupCallSettingsButton).get()
 		: nullptr;
+	const auto recordStartDate = goodReal ? real->recordStartDate() : 0;
+	auto recordingLabel = [&] {
+		return ;
+	};
+	const auto editRecording = !addEditRecording
+		? nullptr
+		: !recordStartDate
+		? AddButton(
+			layout,
+			tr::lng_group_call_recording_start(),
+			st::groupCallSettingsButton).get()
+		: AddButtonWithLabel(
+			layout,
+			tr::lng_group_call_recording_stop(),
+			base::timer_each(
+				crl::time(1000)
+			) | rpl::map([=] {
+				const auto now = base::unixtime::now();
+				const auto elapsed = std::max(now - recordStartDate, 0);
+				const auto hours = elapsed / 3600;
+				const auto minutes = (elapsed % 3600) / 60;
+				const auto seconds = (elapsed % 60);
+				return hours
+					? QString("%1:%2:%3"
+					).arg(hours
+					).arg(minutes, 2, 10, QChar('0')
+					).arg(seconds, 2, 10, QChar('0'))
+					: QString("%1:%2"
+					).arg(minutes
+					).arg(seconds, 2, 10, QChar('0'));
+			}),
+			st::groupCallSettingsButton).get();
 	if (editJoinAs) {
 		editJoinAs->setClickedCallback([=] {
 			const auto context = Group::ChooseJoinAsProcess::Context::Switch;
@@ -184,14 +271,39 @@ void GroupCallSettingsBox(
 		editTitle->setClickedCallback([=] {
 			const auto done = [=](const QString &title) {
 				call->changeTitle(title);
+				box->closeBox();
 			};
 			box->getDelegate()->show(Box(
 				EditGroupCallTitleBox,
 				peer->name,
-				goodReal ? real->title() : QString(),
+				real->title(),
 				done));
 		});
 	}
+	if (editRecording) {
+		editRecording->setClickedCallback([=] {
+			const auto done = [=](QString title) {
+				call->toggleRecording(!recordStartDate, title);
+				const auto container = box->getDelegate()->outerContainer();
+				Ui::Toast::Show(
+					container,
+					(recordStartDate
+						? tr::lng_group_call_recording_stopped(tr::now)
+						: tr::lng_group_call_recording_started(tr::now)));
+				box->closeBox();
+			};
+			if (recordStartDate) {
+				box->getDelegate()->show(Box(
+					StopGroupCallRecordingBox,
+					done));
+			} else {
+				box->getDelegate()->show(Box(
+					StartGroupCallRecordingBox,
+					real->title(),
+					done));
+			}
+		});
+	}
 	const auto muteJoined = addCheck
 		? AddButton(
 			layout,

Telegram/SourceFiles/data/data_group_call.cpp

@@ -179,10 +179,12 @@ void GroupCall::applyCall(const MTPGroupCall &call, bool force) {
 			_version = data.vversion().v;
 		}
 		const auto title = qs(data.vtitle().value_or_empty());
+		const auto recordDate = data.vrecord_start_date().value_or_empty();
 		const auto changed = (_joinMuted != data.is_join_muted())
 			|| (_fullCount.current() != data.vparticipants_count().v)
 			|| (_canChangeJoinMuted != data.is_can_change_join_muted())
-			|| (_title.current() != title);
+			|| (_title.current() != title)
+			|| (_recordStartDate != recordDate);
 		if (!force && !changed) {
 			return;
 		} else if (!force && _version > data.vversion().v) {
@@ -193,6 +195,7 @@ void GroupCall::applyCall(const MTPGroupCall &call, bool force) {
 		_canChangeJoinMuted = data.is_can_change_join_muted();
 		_fullCount = data.vparticipants_count().v;
 		_title = title;
+		_recordStartDate = recordDate;
 		changePeerEmptyCallFlag();
 	}, [&](const MTPDgroupCallDiscarded &data) {
 		const auto id = _id;

Telegram/SourceFiles/data/data_group_call.h

@@ -53,6 +53,9 @@ public:
 	void setTitle(const QString &title) {
 		_title = title;
 	}
+	[[nodiscard]] TimeId recordStartDate() const {
+		return _recordStartDate;
+	}
 
 	void setPeer(not_null<PeerData*> peer);
 
@@ -127,6 +130,7 @@ private:
 	base::Timer _speakingByActiveFinishTimer;
 	QString _nextOffset;
 	rpl::variable<int> _fullCount = 0;
+	TimeId _recordStartDate = 0;
 
 	base::flat_map<uint32, LastSpokeTimes> _unknownSpokenSsrcs;
 	base::flat_map<PeerId, LastSpokeTimes> _unknownSpokenPeerIds;