/*
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/add_contact_box.h"

#include "styles/style_boxes.h"
#include "styles/style_dialogs.h"
#include "lang/lang_keys.h"
#include "mtproto/sender.h"
#include "base/flat_set.h"
#include "boxes/confirm_box.h"
#include "boxes/photo_crop_box.h"
#include "boxes/peer_list_controllers.h"
#include "boxes/peers/add_participants_box.h"
#include "boxes/peers/edit_participant_box.h"
#include "boxes/peers/edit_participants_box.h"
#include "core/file_utilities.h"
#include "core/application.h"
#include "chat_helpers/emoji_suggestions_widget.h"
#include "ui/widgets/checkbox.h"
#include "ui/widgets/buttons.h"
#include "ui/widgets/input_fields.h"
#include "ui/widgets/labels.h"
#include "ui/toast/toast.h"
#include "ui/special_buttons.h"
#include "ui/text_options.h"
#include "data/data_channel.h"
#include "data/data_chat.h"
#include "data/data_user.h"
#include "data/data_session.h"
#include "mainwidget.h"
#include "mainwindow.h"
#include "apiwrap.h"
#include "observer_peer.h"
#include "auth_session.h"

namespace {

constexpr auto kMaxGroupChannelTitle = 255; // See also edit_peer_info_box.
constexpr auto kMaxChannelDescription = 255; // See also edit_peer_info_box.
constexpr auto kMinUsernameLength = 5;

bool IsValidPhone(QString phone) {
	phone = phone.replace(QRegularExpression(qsl("[^\\d]")), QString());
	return (phone.length() >= 8)
		|| (phone == qsl("333"))
		|| (phone.startsWith(qsl("42"))
			&& (phone.length() == 2
				|| phone.length() == 5
				|| phone == qsl("4242")));
}

} // namespace

style::InputField CreateBioFieldStyle() {
	auto result = st::newGroupDescription;
	result.textMargins.setRight(
		st::boxTextFont->spacew
		+ st::boxTextFont->width(QString::number(kMaxBioLength)));
	return result;
}

QString PeerFloodErrorText(PeerFloodType type) {
	auto link = textcmdLink(
		Core::App().createInternalLinkFull(qsl("spambot")),
		lang(lng_cant_more_info));
	if (type == PeerFloodType::InviteGroup) {
		return lng_cant_invite_not_contact(lt_more_info, link);
	}
	return lng_cant_send_to_not_contact(lt_more_info, link);
}

void ShowAddParticipantsError(
		const QString &error,
		not_null<PeerData*> chat,
		const std::vector<not_null<UserData*>> &users) {
	if (error == qstr("USER_BOT")) {
		const auto channel = chat->asChannel();
		if ((users.size() == 1)
			&& (users.front()->botInfo != nullptr)
			&& channel
			&& !channel->isMegagroup()
			&& channel->canAddAdmins()) {
			const auto makeAdmin = [=] {
				const auto user = users.front();
				const auto weak = std::make_shared<QPointer<EditAdminBox>>();
				const auto close = [=](auto&&...) {
					if (*weak) {
						(*weak)->closeBox();
					}
				};
				const auto saveCallback = SaveAdminCallback(
					channel,
					user,
					close,
					close);
				auto box = Box<EditAdminBox>(
					channel,
					user,
					MTP_chatAdminRights(MTP_flags(0)));
				box->setSaveCallback(saveCallback);
				*weak = Ui::show(std::move(box));
			};
			Ui::show(
				Box<ConfirmBox>(
					lang(lng_cant_invite_offer_admin),
					lang(lng_cant_invite_make_admin),
					lang(lng_cancel),
					makeAdmin),
				LayerOption::KeepOther);
			return;
		}
	}
	const auto bot = ranges::find_if(users, [](not_null<UserData*> user) {
		return user->botInfo != nullptr;
	});
	const auto hasBot = (bot != end(users));
	const auto text = [&] {
		if (error == qstr("USER_BOT")) {
			return lang(lng_cant_invite_bot_to_channel);
		} else if (error == qstr("USER_LEFT_CHAT")) {
			// Trying to return a user who has left.
		} else if (error == qstr("USER_KICKED")) {
			// Trying to return a user who was kicked by admin.
			return lang(lng_cant_invite_banned);
		} else if (error == qstr("USER_PRIVACY_RESTRICTED")) {
			return lang(lng_cant_invite_privacy);
		} else if (error == qstr("USER_NOT_MUTUAL_CONTACT")) {
			// Trying to return user who does not have me in contacts.
			return lang(lng_failed_add_not_mutual);
		} else if (error == qstr("USER_ALREADY_PARTICIPANT") && hasBot) {
			return lang(lng_bot_already_in_group);
		} else if (error == qstr("BOT_GROUPS_BLOCKED")) {
			return lang(lng_error_cant_add_bot);
		} else if (error == qstr("PEER_FLOOD")) {
			const auto isGroup = (chat->isChat() || chat->isMegagroup());
			return PeerFloodErrorText(isGroup
				? PeerFloodType::InviteGroup
				: PeerFloodType::InviteChannel);
		} else if (error == qstr("ADMINS_TOO_MUCH")) {
			const auto isGroup = (chat->isChat() || chat->isMegagroup());
			return lang(isGroup
				? lng_error_admin_limit
				: lng_error_admin_limit_channel);
		}
		return lang(lng_failed_add_participant);
	}();
	Ui::show(Box<InformBox>(text), LayerOption::KeepOther);
}

class RevokePublicLinkBox::Inner : public TWidget, private MTP::Sender {
public:
	Inner(QWidget *parent, Fn<void()> revokeCallback);

protected:
	void mouseMoveEvent(QMouseEvent *e) override;
	void mousePressEvent(QMouseEvent *e) override;
	void mouseReleaseEvent(QMouseEvent *e) override;
	void paintEvent(QPaintEvent *e) override;

private:
	struct ChatRow {
		ChatRow(not_null<PeerData*> peer) : peer(peer) {
		}

		not_null<PeerData*> peer;
		Ui::Text::String name, status;
	};
	void paintChat(Painter &p, const ChatRow &row, bool selected) const;
	void updateSelected();

	PeerData *_selected = nullptr;
	PeerData *_pressed = nullptr;

	std::vector<ChatRow> _rows;

	int _rowsTop = 0;
	int _rowHeight = 0;
	int _revokeWidth = 0;

	Fn<void()> _revokeCallback;
	mtpRequestId _revokeRequestId = 0;
	QPointer<ConfirmBox> _weakRevokeConfirmBox;

};

AddContactBox::AddContactBox(QWidget*, QString fname, QString lname, QString phone)
: _first(this, st::defaultInputField, langFactory(lng_signup_firstname), fname)
, _last(this, st::defaultInputField, langFactory(lng_signup_lastname), lname)
, _phone(this, st::defaultInputField, langFactory(lng_contact_phone), phone)
, _invertOrder(langFirstNameGoesSecond()) {
	if (!phone.isEmpty()) {
		_phone->setDisabled(true);
	}
}

AddContactBox::AddContactBox(QWidget*, UserData *user)
: _user(user)
, _first(this, st::defaultInputField, langFactory(lng_signup_firstname), user->firstName)
, _last(this, st::defaultInputField, langFactory(lng_signup_lastname), user->lastName)
, _phone(this, st::defaultInputField, langFactory(lng_contact_phone), user->phone())
, _invertOrder(langFirstNameGoesSecond()) {
	_phone->setDisabled(true);
}

void AddContactBox::prepare() {
	if (_invertOrder) {
		setTabOrder(_last, _first);
	}
	if (_user) {
		setTitle(langFactory(lng_edit_contact_title));
	} else {
		auto readyToAdd = !_phone->getLastText().isEmpty() && (!_first->getLastText().isEmpty() || !_last->getLastText().isEmpty());
		setTitle(langFactory(readyToAdd ? lng_confirm_contact_data : lng_enter_contact_data));
	}
	updateButtons();

	connect(_first, &Ui::InputField::submitted, [=] { submit(); });
	connect(_last, &Ui::InputField::submitted, [=] { submit(); });
	connect(_phone, &Ui::PhoneInput::submitted, [=] { submit(); });

	setDimensions(st::boxWideWidth, st::contactPadding.top() + _first->height() + st::contactSkip + _last->height() + st::contactPhoneSkip + _phone->height() + st::contactPadding.bottom() + st::boxPadding.bottom());
}

void AddContactBox::setInnerFocus() {
	if ((_first->getLastText().isEmpty() && _last->getLastText().isEmpty()) || !_phone->isEnabled()) {
		(_invertOrder ? _last : _first)->setFocusFast();
		_phone->finishAnimating();
	} else {
		_phone->setFocusFast();
	}
}

void AddContactBox::paintEvent(QPaintEvent *e) {
	BoxContent::paintEvent(e);

	Painter p(this);
	if (_retrying) {
		p.setPen(st::boxTextFg);
		p.setFont(st::boxTextFont);
		auto textHeight = height() - st::contactPadding.top() - st::contactPadding.bottom() - st::boxPadding.bottom();
		p.drawText(QRect(st::boxPadding.left(), st::contactPadding.top(), width() - st::boxPadding.left() - st::boxPadding.right(), textHeight), lng_contact_not_joined(lt_name, _sentName), style::al_topleft);
	} else {
		st::contactUserIcon.paint(
			p,
			st::boxPadding.left() + st::contactIconPosition.x(),
			_first->y() + st::contactIconPosition.y(),
			width());
		st::contactPhoneIcon.paint(
			p,
			st::boxPadding.left() + st::contactIconPosition.x(),
			_phone->y() + st::contactIconPosition.y(),
			width());
	}
}

void AddContactBox::resizeEvent(QResizeEvent *e) {
	BoxContent::resizeEvent(e);

	_first->resize(width() - st::boxPadding.left() - st::contactPadding.left() - st::boxPadding.right(), _first->height());
	_last->resize(_first->width(), _last->height());
	_phone->resize(_first->width(), _last->height());
	if (_invertOrder) {
		_last->moveToLeft(st::boxPadding.left() + st::contactPadding.left(), st::contactPadding.top());
		_first->moveToLeft(st::boxPadding.left() + st::contactPadding.left(), _last->y() + _last->height() + st::contactSkip);
		_phone->moveToLeft(st::boxPadding.left() + st::contactPadding.left(), _first->y() + _first->height() + st::contactPhoneSkip);
	} else {
		_first->moveToLeft(st::boxPadding.left() + st::contactPadding.left(), st::contactPadding.top());
		_last->moveToLeft(st::boxPadding.left() + st::contactPadding.left(), _first->y() + _first->height() + st::contactSkip);
		_phone->moveToLeft(st::boxPadding.left() + st::contactPadding.left(), _last->y() + _last->height() + st::contactPhoneSkip);
	}
}

void AddContactBox::submit() {
	if (_first->hasFocus()) {
		_last->setFocus();
	} else if (_last->hasFocus()) {
		if (_phone->isEnabled()) {
			_phone->setFocus();
		} else {
			save();
		}
	} else if (_phone->hasFocus()) {
		save();
	}
}

void AddContactBox::save() {
	if (_addRequest) return;

	auto firstName = TextUtilities::PrepareForSending(_first->getLastText());
	auto lastName = TextUtilities::PrepareForSending(_last->getLastText());
	auto phone = _phone->getLastText().trimmed();
	if (firstName.isEmpty() && lastName.isEmpty()) {
		if (_invertOrder) {
			_last->setFocus();
			_last->showError();
		} else {
			_first->setFocus();
			_first->showError();
		}
		return;
	} else if (!_user && !IsValidPhone(phone)) {
		_phone->setFocus();
		_phone->showError();
		return;
	}
	if (firstName.isEmpty()) {
		firstName = lastName;
		lastName = QString();
	}
	_sentName = firstName;
	if (_user) {
		_contactId = rand_value<uint64>();
		QVector<MTPInputContact> v(1, MTP_inputPhoneContact(MTP_long(_contactId), MTP_string(_user->phone()), MTP_string(firstName), MTP_string(lastName)));
		_addRequest = MTP::send(MTPcontacts_ImportContacts(MTP_vector<MTPInputContact>(v)), rpcDone(&AddContactBox::onSaveUserDone), rpcFail(&AddContactBox::onSaveUserFail));
	} else {
		_contactId = rand_value<uint64>();
		QVector<MTPInputContact> v(1, MTP_inputPhoneContact(MTP_long(_contactId), MTP_string(phone), MTP_string(firstName), MTP_string(lastName)));
		_addRequest = MTP::send(MTPcontacts_ImportContacts(MTP_vector<MTPInputContact>(v)), rpcDone(&AddContactBox::onImportDone));
	}
}

bool AddContactBox::onSaveUserFail(const RPCError &error) {
	if (MTP::isDefaultHandledError(error)) return false;

	_addRequest = 0;
	const auto &err = error.type();
	const auto firstName = _first->getLastText().trimmed();
	const auto lastName = _last->getLastText().trimmed();
	if (err == "CHAT_TITLE_NOT_MODIFIED") {
		_user->setName(firstName, lastName, _user->nameOrPhone, _user->username);
		closeBox();
		return true;
	} else if (err == "NO_CHAT_TITLE") {
		_first->setFocus();
		_first->showError();
		return true;
	}
	_first->setFocus();
	return true;
}

void AddContactBox::onImportDone(const MTPcontacts_ImportedContacts &res) {
	if (!isBoxShown() || !App::main()) return;

	const auto &d = res.c_contacts_importedContacts();
	Auth().data().processUsers(d.vusers);

	const auto &v = d.vimported.v;
	const auto user = [&]() -> UserData* {
		if (!v.isEmpty()) {
			auto &c = v.front().c_importedContact();
			if (c.vclient_id.v == _contactId) {
				return Auth().data().userLoaded(c.vuser_id.v);
			}
		}
		return nullptr;
	}();
	if (user) {
		if (user->isContact() || user->session().supportMode()) {
			Ui::showPeerHistory(user, ShowAtTheEndMsgId);
		}
		Ui::hideLayer();
	} else {
		hideChildren();
		_retrying = true;
		updateButtons();
		update();
	}
}

void AddContactBox::onSaveUserDone(const MTPcontacts_ImportedContacts &res) {
	auto &d = res.c_contacts_importedContacts();
	Auth().data().processUsers(d.vusers);
	closeBox();
}

void AddContactBox::retry() {
	_addRequest = 0;
	_contactId = 0;
	showChildren();
	_retrying = false;
	updateButtons();
	_first->setText(QString());
	_last->setText(QString());
	_phone->clearText();
	_phone->setDisabled(false);
	_first->setFocus();
	update();
}

void AddContactBox::updateButtons() {
	clearButtons();
	if (_retrying) {
		addButton(langFactory(lng_try_other_contact), [this] { retry(); });
	} else {
		addButton(langFactory(_user ? lng_settings_save : lng_add_contact), [this] { save(); });
		addButton(langFactory(lng_cancel), [this] { closeBox(); });
	}
}

GroupInfoBox::GroupInfoBox(
	QWidget*,
	Type type,
	const QString &title,
	Fn<void(not_null<ChannelData*>)> channelDone)
: _type(type)
, _initialTitle(title)
, _channelDone(std::move(channelDone)) {
}

void GroupInfoBox::prepare() {
	setMouseTracking(true);

	_photo.create(
		this,
		lang((_type == Type::Channel)
			? lng_create_channel_crop
			: lng_create_group_crop),
		Ui::UserpicButton::Role::ChangePhoto,
		st::defaultUserpicButton);
	_title.create(
		this,
		st::defaultInputField,
		langFactory((_type == Type::Channel)
			? lng_dlg_new_channel_name
			: lng_dlg_new_group_name),
		_initialTitle);
	_title->setMaxLength(kMaxGroupChannelTitle);
	_title->setInstantReplaces(Ui::InstantReplaces::Default());
	_title ->setInstantReplacesEnabled(Global::ReplaceEmojiValue());
	Ui::Emoji::SuggestionsController::Init(
		getDelegate()->outerContainer(),
		_title);

	if (_type != Type::Group) {
		_description.create(
			this,
			st::newGroupDescription,
			Ui::InputField::Mode::MultiLine,
			langFactory(lng_create_group_description));
		_description->show();
		_description->setMaxLength(kMaxChannelDescription);
		_description->setInstantReplaces(Ui::InstantReplaces::Default());
		_description->setInstantReplacesEnabled(
			Global::ReplaceEmojiValue());

		connect(_description, &Ui::InputField::resized, [=] { descriptionResized(); });
		connect(_description, &Ui::InputField::submitted, [=] { submit(); });
		connect(_description, &Ui::InputField::cancelled, [=] { closeBox(); });

		Ui::Emoji::SuggestionsController::Init(
			getDelegate()->outerContainer(),
			_description);
	}

	connect(_title, &Ui::InputField::submitted, [=] { submitName(); });

	addButton(langFactory((_type != Type::Group) ? lng_create_group_create : lng_create_group_next), [this] { submit(); });
	addButton(langFactory(lng_cancel), [this] { closeBox(); });

	updateMaxHeight();
}

void GroupInfoBox::setInnerFocus() {
	_title->setFocusFast();
}

void GroupInfoBox::resizeEvent(QResizeEvent *e) {
	BoxContent::resizeEvent(e);

	_photo->moveToLeft(st::boxPadding.left() + st::newGroupInfoPadding.left(), st::boxPadding.top() + st::newGroupInfoPadding.top());

	auto nameLeft = st::defaultUserpicButton.size.width()
		+ st::newGroupNamePosition.x();
	_title->resize(width() - st::boxPadding.left() - st::newGroupInfoPadding.left() - st::boxPadding.right() - nameLeft, _title->height());
	_title->moveToLeft(st::boxPadding.left() + st::newGroupInfoPadding.left() + nameLeft, st::boxPadding.top() + st::newGroupInfoPadding.top() + st::newGroupNamePosition.y());
	if (_description) {
		_description->resize(width() - st::boxPadding.left() - st::newGroupInfoPadding.left() - st::boxPadding.right(), _description->height());
		auto descriptionLeft = st::boxPadding.left()
			+ st::newGroupInfoPadding.left();
		auto descriptionTop = st::boxPadding.top()
			+ st::newGroupInfoPadding.top()
			+ st::defaultUserpicButton.size.height()
			+ st::newGroupDescriptionPadding.top();
		_description->moveToLeft(descriptionLeft, descriptionTop);
	}
}

void GroupInfoBox::submitName() {
	if (_title->getLastText().trimmed().isEmpty()) {
		_title->setFocus();
		_title->showError();
	} else if (_description) {
		_description->setFocus();
	} else {
		submit();
	}
}

void GroupInfoBox::createGroup(
		not_null<PeerListBox*> selectUsersBox,
		const QString &title,
		const std::vector<not_null<PeerData*>> &users) {
	if (_creationRequestId) return;

	auto inputs = QVector<MTPInputUser>();
	inputs.reserve(users.size());
	for (auto peer : users) {
		auto user = peer->asUser();
		Assert(user != nullptr);
		if (!user->isSelf()) {
			inputs.push_back(user->inputUser);
		}
	}
	if (inputs.empty()) {
		return;
	}
	_creationRequestId = request(MTPmessages_CreateChat(
		MTP_vector<MTPInputUser>(inputs),
		MTP_string(title)
	)).done([=](const MTPUpdates &result) {
		auto image = _photo->takeResultImage();
		Ui::hideLayer();

		Auth().api().applyUpdates(result);

		auto success = base::make_optional(&result)
			| [](auto updates) -> std::optional<const QVector<MTPChat>*> {
				switch (updates->type()) {
				case mtpc_updates:
					return &updates->c_updates().vchats.v;
				case mtpc_updatesCombined:
					return &updates->c_updatesCombined().vchats.v;
				}
				LOG(("API Error: unexpected update cons %1 "
					"(GroupInfoBox::creationDone)").arg(updates->type()));
				return std::nullopt;
			}
			| [](auto chats) {
				return (!chats->empty()
					&& chats->front().type() == mtpc_chat)
					? base::make_optional(chats)
					: std::nullopt;
			}
			| [](auto chats) {
				return Auth().data().chat(chats->front().c_chat().vid.v);
			}
			| [&](not_null<ChatData*> chat) {
				if (!image.isNull()) {
					chat->session().api().uploadPeerPhoto(
						chat,
						std::move(image));
				}
				Ui::showPeerHistory(chat, ShowAtUnreadMsgId);
			};
		if (!success) {
			LOG(("API Error: chat not found in updates "
				"(ContactsBox::creationDone)"));
		}
	}).fail([=](const RPCError &error) {
		_creationRequestId = 0;
		if (error.type() == qstr("NO_CHAT_TITLE")) {
			auto weak = make_weak(this);
			selectUsersBox->closeBox();
			if (weak) {
				_title->showError();
			}
		} else if (error.type() == qstr("USERS_TOO_FEW")) {
			Ui::show(
				Box<InformBox>(lang(lng_cant_invite_privacy)),
				LayerOption::KeepOther);
		} else if (error.type() == qstr("PEER_FLOOD")) {
			Ui::show(
				Box<InformBox>(
					PeerFloodErrorText(PeerFloodType::InviteGroup)),
				LayerOption::KeepOther);
		} else if (error.type() == qstr("USER_RESTRICTED")) {
			Ui::show(
				Box<InformBox>(lang(lng_cant_do_this)),
				LayerOption::KeepOther);
		}
	}).send();
}

void GroupInfoBox::submit() {
	if (_creationRequestId) return;

	auto title = TextUtilities::PrepareForSending(_title->getLastText());
	auto description = _description
		? TextUtilities::PrepareForSending(
			_description->getLastText(),
			TextUtilities::PrepareTextOption::CheckLinks)
		: QString();
	if (title.isEmpty()) {
		_title->setFocus();
		_title->showError();
		return;
	}
	if (_type != Type::Group) {
		createChannel(title, description);
	} else {
		auto initBox = [title, weak = make_weak(this)](
				not_null<PeerListBox*> box) {
			auto create = [box, title, weak] {
				if (weak) {
					auto rows = box->peerListCollectSelectedRows();
					if (!rows.empty()) {
						weak->createGroup(box, title, rows);
					}
				}
			};
			box->addButton(
				langFactory(lng_create_group_create),
				std::move(create));
			box->addButton(
				langFactory(lng_cancel),
				[box] { box->closeBox(); });
		};
		Ui::show(
			Box<PeerListBox>(
				std::make_unique<AddParticipantsBoxController>(),
				std::move(initBox)),
			LayerOption::KeepOther);
	}
}

void GroupInfoBox::createChannel(const QString &title, const QString &description) {
	const auto flags = (_type == Type::Megagroup)
		? MTPchannels_CreateChannel::Flag::f_megagroup
		: MTPchannels_CreateChannel::Flag::f_broadcast;
	_creationRequestId = request(MTPchannels_CreateChannel(
		MTP_flags(flags),
		MTP_string(title),
		MTP_string(description),
		MTPInputGeoPoint(), // geo_point
		MTPstring() // address
	)).done([=](const MTPUpdates &result) {
		Auth().api().applyUpdates(result);

		const auto success = base::make_optional(&result)
			| [](auto updates) -> std::optional<const QVector<MTPChat>*> {
				switch (updates->type()) {
				case mtpc_updates:
					return &updates->c_updates().vchats.v;
				case mtpc_updatesCombined:
					return &updates->c_updatesCombined().vchats.v;
				}
				LOG(("API Error: unexpected update cons %1 (GroupInfoBox::createChannel)").arg(updates->type()));
				return std::nullopt;
			}
			| [](auto chats) {
				return (!chats->empty() && chats->front().type() == mtpc_channel)
					? base::make_optional(chats)
					: std::nullopt;
			}
			| [](auto chats) {
				return Auth().data().channel(chats->front().c_channel().vid.v);
			}
			| [&](not_null<ChannelData*> channel) {
				auto image = _photo->takeResultImage();
				if (!image.isNull()) {
					channel->session().api().uploadPeerPhoto(
						channel,
						std::move(image));
				}
				_createdChannel = channel;
				_creationRequestId = request(MTPmessages_ExportChatInvite(
					_createdChannel->input
				)).done([=](const MTPExportedChatInvite &result) {
					_creationRequestId = 0;
					if (result.type() == mtpc_chatInviteExported) {
						auto link = qs(result.c_chatInviteExported().vlink);
						_createdChannel->setInviteLink(link);
					}
					if (_channelDone) {
						const auto callback = _channelDone;
						const auto argument = _createdChannel;
						closeBox();
						callback(argument);
					} else {
						Ui::show(Box<SetupChannelBox>(_createdChannel));
					}
				}).send();
			};
		if (!success) {
			LOG(("API Error: channel not found in updates (GroupInfoBox::creationDone)"));
			closeBox();
		}
	}).fail([this](const RPCError &error) {
		_creationRequestId = 0;
		if (error.type() == "NO_CHAT_TITLE") {
			_title->setFocus();
			_title->showError();
		} else if (error.type() == qstr("USER_RESTRICTED")) {
			Ui::show(Box<InformBox>(lang(lng_cant_do_this)));
		} else if (error.type() == qstr("CHANNELS_TOO_MUCH")) {
			Ui::show(Box<InformBox>(lang(lng_cant_do_this))); // TODO
		}
	}).send();
}

void GroupInfoBox::descriptionResized() {
	updateMaxHeight();
	update();
}

void GroupInfoBox::updateMaxHeight() {
	auto newHeight = st::boxPadding.top()
		+ st::newGroupInfoPadding.top()
		+ st::defaultUserpicButton.size.height()
		+ st::boxPadding.bottom()
		+ st::newGroupInfoPadding.bottom();
	if (_description) {
		newHeight += st::newGroupDescriptionPadding.top()
			+ _description->height()
			+ st::newGroupDescriptionPadding.bottom();
	}
	setDimensions(st::boxWideWidth, newHeight);
}

SetupChannelBox::SetupChannelBox(QWidget*, ChannelData *channel, bool existing)
: _channel(channel)
, _existing(existing)
, _privacyGroup(std::make_shared<Ui::RadioenumGroup<Privacy>>(Privacy::Public))
, _public(this, _privacyGroup, Privacy::Public, lang(channel->isMegagroup() ? lng_create_public_group_title : lng_create_public_channel_title), st::defaultBoxCheckbox)
, _private(this, _privacyGroup, Privacy::Private, lang(channel->isMegagroup() ? lng_create_private_group_title : lng_create_private_channel_title), st::defaultBoxCheckbox)
, _aboutPublicWidth(st::boxWideWidth - st::boxPadding.left() - st::boxButtonPadding.right() - st::newGroupPadding.left() - st::defaultRadio.diameter - st::defaultBoxCheckbox.textPosition.x())
, _aboutPublic(st::defaultTextStyle, lang(channel->isMegagroup() ? lng_create_public_group_about : lng_create_public_channel_about), _defaultOptions, _aboutPublicWidth)
, _aboutPrivate(st::defaultTextStyle, lang(channel->isMegagroup() ? lng_create_private_group_about : lng_create_private_channel_about), _defaultOptions, _aboutPublicWidth)
, _link(this, st::setupChannelLink, Fn<QString()>(), channel->username, true) {
}

void SetupChannelBox::prepare() {
	_aboutPublicHeight = _aboutPublic.countHeight(_aboutPublicWidth);

	setMouseTracking(true);

	_checkRequestId = MTP::send(MTPchannels_CheckUsername(_channel->inputChannel, MTP_string("preston")), RPCDoneHandlerPtr(), rpcFail(&SetupChannelBox::onFirstCheckFail));

	addButton(langFactory(lng_settings_save), [=] { save(); });
	addButton(langFactory(_existing ? lng_cancel : lng_create_group_skip), [=] { closeBox(); });

	connect(_link, &Ui::MaskedInputField::changed, [=] { handleChange(); });
	_link->setVisible(_privacyGroup->value() == Privacy::Public);

	_checkTimer.setSingleShot(true);
	connect(&_checkTimer, &QTimer::timeout, [=] { check(); });

	_privacyGroup->setChangedCallback([this](Privacy value) { privacyChanged(value); });
	subscribe(Notify::PeerUpdated(), Notify::PeerUpdatedHandler(Notify::PeerUpdate::Flag::InviteLinkChanged, [this](const Notify::PeerUpdate &update) {
		if (update.peer == _channel) {
			rtlupdate(_invitationLink);
		}
	}));

	boxClosing() | rpl::start_with_next([=] {
		if (!_existing) {
			AddParticipantsBoxController::Start(_channel);
		}
	}, lifetime());

	updateMaxHeight();
}

void SetupChannelBox::setInnerFocus() {
	if (_link->isHidden()) {
		setFocus();
	} else {
		_link->setFocusFast();
	}
}

void SetupChannelBox::updateMaxHeight() {
	auto newHeight = st::boxPadding.top() + st::newGroupPadding.top() + _public->heightNoMargins() + _aboutPublicHeight + st::newGroupSkip + _private->heightNoMargins() + _aboutPrivate.countHeight(_aboutPublicWidth) + st::newGroupSkip + st::newGroupPadding.bottom();
	if (!_channel->isMegagroup() || _privacyGroup->value() == Privacy::Public) {
		newHeight += st::newGroupLinkPadding.top() + _link->height() + st::newGroupLinkPadding.bottom();
	}
	setDimensions(st::boxWideWidth, newHeight);
}

void SetupChannelBox::keyPressEvent(QKeyEvent *e) {
	if (e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return) {
		if (_link->hasFocus()) {
			if (_link->text().trimmed().isEmpty()) {
				_link->setFocus();
				_link->showError();
			} else {
				save();
			}
		}
	} else {
		BoxContent::keyPressEvent(e);
	}
}

void SetupChannelBox::paintEvent(QPaintEvent *e) {
	Painter p(this);

	p.fillRect(e->rect(), st::boxBg);
	p.setPen(st::newGroupAboutFg);

	QRect aboutPublic(st::boxPadding.left() + st::newGroupPadding.left() + st::defaultRadio.diameter + st::defaultBoxCheckbox.textPosition.x(), _public->bottomNoMargins(), _aboutPublicWidth, _aboutPublicHeight);
	_aboutPublic.drawLeft(p, aboutPublic.x(), aboutPublic.y(), aboutPublic.width(), width());

	QRect aboutPrivate(st::boxPadding.left() + st::newGroupPadding.left() + st::defaultRadio.diameter + st::defaultBoxCheckbox.textPosition.x(), _private->bottomNoMargins(), _aboutPublicWidth, _aboutPublicHeight);
	_aboutPrivate.drawLeft(p, aboutPrivate.x(), aboutPrivate.y(), aboutPrivate.width(), width());

	if (!_channel->isMegagroup() || !_link->isHidden()) {
		p.setPen(st::boxTextFg);
		p.setFont(st::newGroupLinkFont);
		p.drawTextLeft(st::boxPadding.left() + st::newGroupPadding.left() + st::defaultInputField.textMargins.left(), _link->y() - st::newGroupLinkPadding.top() + st::newGroupLinkTop, width(), lang(_link->isHidden() ? lng_create_group_invite_link : lng_create_group_link));
	}

	if (_link->isHidden()) {
		if (!_channel->isMegagroup()) {
			QTextOption option(style::al_left);
			option.setWrapMode(QTextOption::WrapAnywhere);
			p.setFont(_linkOver ? st::boxTextFont->underline() : st::boxTextFont);
			p.setPen(st::defaultLinkButton.color);
			auto inviteLinkText = _channel->inviteLink().isEmpty() ? lang(lng_group_invite_create) : _channel->inviteLink();
			p.drawText(_invitationLink, inviteLinkText, option);
		}
	} else {
		if (!_errorText.isEmpty()) {
			p.setPen(st::boxTextFgError);
			p.setFont(st::boxTextFont);
			p.drawTextRight(st::boxPadding.right(), _link->y() - st::newGroupLinkPadding.top() + st::newGroupLinkTop + st::newGroupLinkFont->ascent - st::boxTextFont->ascent, width(), _errorText);
		} else if (!_goodText.isEmpty()) {
			p.setPen(st::boxTextFgGood);
			p.setFont(st::boxTextFont);
			p.drawTextRight(st::boxPadding.right(), _link->y() - st::newGroupLinkPadding.top() + st::newGroupLinkTop + st::newGroupLinkFont->ascent - st::boxTextFont->ascent, width(), _goodText);
		}
	}
}

void SetupChannelBox::resizeEvent(QResizeEvent *e) {
	BoxContent::resizeEvent(e);

	_public->moveToLeft(st::boxPadding.left() + st::newGroupPadding.left(), st::boxPadding.top() + st::newGroupPadding.top());
	_private->moveToLeft(st::boxPadding.left() + st::newGroupPadding.left(), _public->bottomNoMargins() + _aboutPublicHeight + st::newGroupSkip);

	_link->resize(width() - st::boxPadding.left() - st::newGroupLinkPadding.left() - st::boxPadding.right(), _link->height());
	_link->moveToLeft(st::boxPadding.left() + st::newGroupLinkPadding.left(), _private->bottomNoMargins() + _aboutPrivate.countHeight(_aboutPublicWidth) + st::newGroupSkip + st::newGroupPadding.bottom() + st::newGroupLinkPadding.top());
	_invitationLink = QRect(_link->x(), _link->y() + (_link->height() / 2) - st::boxTextFont->height, _link->width(), 2 * st::boxTextFont->height);
}

void SetupChannelBox::mouseMoveEvent(QMouseEvent *e) {
	updateSelected(e->globalPos());
}

void SetupChannelBox::mousePressEvent(QMouseEvent *e) {
	if (_linkOver) {
		if (_channel->inviteLink().isEmpty()) {
			_channel->session().api().exportInviteLink(_channel);
		} else {
			QGuiApplication::clipboard()->setText(_channel->inviteLink());
			Ui::Toast::Show(lang(lng_create_channel_link_copied));
		}
	}
}

void SetupChannelBox::leaveEventHook(QEvent *e) {
	updateSelected(QCursor::pos());
}

void SetupChannelBox::updateSelected(const QPoint &cursorGlobalPosition) {
	QPoint p(mapFromGlobal(cursorGlobalPosition));

	bool linkOver = _invitationLink.contains(p);
	if (linkOver != _linkOver) {
		_linkOver = linkOver;
		update();
		setCursor(_linkOver ? style::cur_pointer : style::cur_default);
	}
}

void SetupChannelBox::save() {
	if (_saveRequestId) {
		return;
	} else if (_privacyGroup->value() == Privacy::Private) {
		if (_existing) {
			_sentUsername = QString();
			_saveRequestId = MTP::send(MTPchannels_UpdateUsername(_channel->inputChannel, MTP_string(_sentUsername)), rpcDone(&SetupChannelBox::onUpdateDone), rpcFail(&SetupChannelBox::onUpdateFail));
		} else {
			closeBox();
		}
	} else {
		const auto link = _link->text().trimmed();
		if (link.isEmpty()) {
			_link->setFocus();
			_link->showError();
			return;
		}
		_sentUsername = link;
		_saveRequestId = MTP::send(MTPchannels_UpdateUsername(_channel->inputChannel, MTP_string(_sentUsername)), rpcDone(&SetupChannelBox::onUpdateDone), rpcFail(&SetupChannelBox::onUpdateFail));
	}
}

void SetupChannelBox::handleChange() {
	QString name = _link->text().trimmed();
	if (name.isEmpty()) {
		if (!_errorText.isEmpty() || !_goodText.isEmpty()) {
			_errorText = _goodText = QString();
			update();
		}
		_checkTimer.stop();
	} else {
		int32 len = name.size();
		for (int32 i = 0; i < len; ++i) {
			QChar ch = name.at(i);
			if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z') && (ch < '0' || ch > '9') && ch != '_') {
				if (_errorText != lang(lng_create_channel_link_bad_symbols)) {
					_errorText = lang(lng_create_channel_link_bad_symbols);
					update();
				}
				_checkTimer.stop();
				return;
			}
		}
		if (name.size() < kMinUsernameLength) {
			if (_errorText != lang(lng_create_channel_link_too_short)) {
				_errorText = lang(lng_create_channel_link_too_short);
				update();
			}
			_checkTimer.stop();
		} else {
			if (!_errorText.isEmpty() || !_goodText.isEmpty()) {
				_errorText = _goodText = QString();
				update();
			}
			_checkTimer.start(UsernameCheckTimeout);
		}
	}
}

void SetupChannelBox::check() {
	if (_checkRequestId) {
		MTP::cancel(_checkRequestId);
	}
	QString link = _link->text().trimmed();
	if (link.size() >= kMinUsernameLength) {
		_checkUsername = link;
		_checkRequestId = MTP::send(
			MTPchannels_CheckUsername(
				_channel->inputChannel,
				MTP_string(link)),
			rpcDone(&SetupChannelBox::onCheckDone),
			rpcFail(&SetupChannelBox::onCheckFail));
	}
}

void SetupChannelBox::privacyChanged(Privacy value) {
	if (value == Privacy::Public) {
		if (_tooMuchUsernames) {
			_privacyGroup->setValue(Privacy::Private);
			Ui::show(Box<RevokePublicLinkBox>(crl::guard(this, [this] {
				_tooMuchUsernames = false;
				_privacyGroup->setValue(Privacy::Public);
				check();
			})), LayerOption::KeepOther);
			return;
		}
		_link->show();
		_link->setDisplayFocused(true);
		_link->setFocus();
	} else {
		_link->hide();
		setFocus();
	}
	if (_channel->isMegagroup()) {
		updateMaxHeight();
	}
	update();
}

void SetupChannelBox::onUpdateDone(const MTPBool &result) {
	_channel->setName(TextUtilities::SingleLine(_channel->name), _sentUsername);
	closeBox();
}

bool SetupChannelBox::onUpdateFail(const RPCError &error) {
	if (MTP::isDefaultHandledError(error)) return false;

	_saveRequestId = 0;
	QString err(error.type());
	if (err == "USERNAME_NOT_MODIFIED" || _sentUsername == _channel->username) {
		_channel->setName(TextUtilities::SingleLine(_channel->name), TextUtilities::SingleLine(_sentUsername));
		closeBox();
		return true;
	} else if (err == "USERNAME_INVALID") {
		_link->setFocus();
		_link->showError();
		_errorText = lang(lng_create_channel_link_invalid);
		update();
		return true;
	} else if (err == "USERNAME_OCCUPIED" || err == "USERNAMES_UNAVAILABLE") {
		_link->setFocus();
		_link->showError();
		_errorText = lang(lng_create_channel_link_occupied);
		update();
		return true;
	}
	_link->setFocus();
	return true;
}

void SetupChannelBox::onCheckDone(const MTPBool &result) {
	_checkRequestId = 0;
	QString newError = (mtpIsTrue(result) || _checkUsername == _channel->username) ? QString() : lang(lng_create_channel_link_occupied);
	QString newGood = newError.isEmpty() ? lang(lng_create_channel_link_available) : QString();
	if (_errorText != newError || _goodText != newGood) {
		_errorText = newError;
		_goodText = newGood;
		update();
	}
}

bool SetupChannelBox::onCheckFail(const RPCError &error) {
	if (MTP::isDefaultHandledError(error)) return false;

	_checkRequestId = 0;
	QString err(error.type());
	if (err == qstr("CHANNEL_PUBLIC_GROUP_NA")) {
		Ui::hideLayer();
		return true;
	} else if (err == qstr("CHANNELS_ADMIN_PUBLIC_TOO_MUCH")) {
		if (_existing) {
			showRevokePublicLinkBoxForEdit();
		} else {
			_tooMuchUsernames = true;
			_privacyGroup->setValue(Privacy::Private);
		}
		return true;
	} else if (err == qstr("USERNAME_INVALID")) {
		_errorText = lang(lng_create_channel_link_invalid);
		update();
		return true;
	} else if (err == qstr("USERNAME_OCCUPIED") && _checkUsername != _channel->username) {
		_errorText = lang(lng_create_channel_link_occupied);
		update();
		return true;
	}
	_goodText = QString();
	_link->setFocus();
	return true;
}

void SetupChannelBox::showRevokePublicLinkBoxForEdit() {
	closeBox();
	Ui::show(Box<RevokePublicLinkBox>([channel = _channel, existing = _existing]() {
		Ui::show(
			Box<SetupChannelBox>(channel, existing),
			LayerOption::KeepOther);
	}), LayerOption::KeepOther);
}

bool SetupChannelBox::onFirstCheckFail(const RPCError &error) {
	if (MTP::isDefaultHandledError(error)) return false;

	_checkRequestId = 0;
	QString err(error.type());
	if (err == qstr("CHANNEL_PUBLIC_GROUP_NA")) {
		Ui::hideLayer();
		return true;
	} else if (err == qstr("CHANNELS_ADMIN_PUBLIC_TOO_MUCH")) {
		if (_existing) {
			showRevokePublicLinkBoxForEdit();
		} else {
			_tooMuchUsernames = true;
			_privacyGroup->setValue(Privacy::Private);
		}
		return true;
	}
	_goodText = QString();
	_link->setFocus();
	return true;
}

EditNameBox::EditNameBox(QWidget*, not_null<UserData*> user)
: _user(user)
, _first(this, st::defaultInputField, langFactory(lng_signup_firstname), _user->firstName)
, _last(this, st::defaultInputField, langFactory(lng_signup_lastname), _user->lastName)
, _invertOrder(langFirstNameGoesSecond()) {
}

void EditNameBox::prepare() {
	auto newHeight = st::contactPadding.top() + _first->height();

	setTitle(langFactory(lng_edit_self_title));
	newHeight += st::contactSkip + _last->height();

	newHeight += st::boxPadding.bottom() + st::contactPadding.bottom();
	setDimensions(st::boxWideWidth, newHeight);

	addButton(langFactory(lng_settings_save), [=] { save(); });
	addButton(langFactory(lng_cancel), [=] { closeBox(); });
	if (_invertOrder) {
		setTabOrder(_last, _first);
	}
	_first->setMaxLength(kMaxGroupChannelTitle);
	_last->setMaxLength(kMaxGroupChannelTitle);

	connect(_first, &Ui::InputField::submitted, [=] { submit(); });
	connect(_last, &Ui::InputField::submitted, [=] { submit(); });
}

void EditNameBox::setInnerFocus() {
	(_invertOrder ? _last : _first)->setFocusFast();
}

void EditNameBox::submit() {
	if (_first->hasFocus()) {
		_last->setFocus();
	} else if (_last->hasFocus()) {
		if (_first->getLastText().trimmed().isEmpty()) {
			_first->setFocus();
			_first->showError();
		} else if (_last->getLastText().trimmed().isEmpty()) {
			_last->setFocus();
			_last->showError();
		} else {
			save();
		}
	}
}

void EditNameBox::resizeEvent(QResizeEvent *e) {
	BoxContent::resizeEvent(e);

	_first->resize(width() - st::boxPadding.left() - st::newGroupInfoPadding.left() - st::boxPadding.right(), _first->height());
	_last->resize(_first->size());
	if (_invertOrder) {
		_last->moveToLeft(st::boxPadding.left() + st::newGroupInfoPadding.left(), st::contactPadding.top());
		_first->moveToLeft(st::boxPadding.left() + st::newGroupInfoPadding.left(), _last->y() + _last->height() + st::contactSkip);
	} else {
		_first->moveToLeft(st::boxPadding.left() + st::newGroupInfoPadding.left(), st::contactPadding.top());
		_last->moveToLeft(st::boxPadding.left() + st::newGroupInfoPadding.left(), _first->y() + _first->height() + st::contactSkip);
	}
}

void EditNameBox::save() {
	if (_requestId) return;

	auto first = TextUtilities::PrepareForSending(_first->getLastText());
	auto last = TextUtilities::PrepareForSending(_last->getLastText());
	if (first.isEmpty() && last.isEmpty()) {
		if (_invertOrder) {
			_last->setFocus();
			_last->showError();
		} else {
			_first->setFocus();
			_first->showError();
		}
		return;
	}
	if (first.isEmpty()) {
		first = last;
		last = QString();
	}
	_sentName = first;
	auto flags = MTPaccount_UpdateProfile::Flag::f_first_name
		| MTPaccount_UpdateProfile::Flag::f_last_name;
	_requestId = MTP::send(
		MTPaccount_UpdateProfile(
			MTP_flags(flags),
			MTP_string(first),
			MTP_string(last),
			MTPstring()),
		rpcDone(&EditNameBox::saveSelfDone),
		rpcFail(&EditNameBox::saveSelfFail));
}

void EditNameBox::saveSelfDone(const MTPUser &user) {
	_user->owner().processUsers(MTP_vector<MTPUser>(1, user));
	closeBox();
}

bool EditNameBox::saveSelfFail(const RPCError &error) {
	if (MTP::isDefaultHandledError(error)) return false;

	auto err = error.type();
	auto first = TextUtilities::SingleLine(_first->getLastText().trimmed());
	auto last = TextUtilities::SingleLine(_last->getLastText().trimmed());
	if (err == "NAME_NOT_MODIFIED") {
		_user->setName(first, last, QString(), TextUtilities::SingleLine(_user->username));
		closeBox();
		return true;
	} else if (err == "FIRSTNAME_INVALID") {
		_first->setFocus();
		_first->showError();
		return true;
	} else if (err == "LASTNAME_INVALID") {
		_last->setFocus();
		_last->showError();
		return true;
	}
	_first->setFocus();
	return true;
}

RevokePublicLinkBox::Inner::Inner(QWidget *parent, Fn<void()> revokeCallback) : TWidget(parent)
, _rowHeight(st::contactsPadding.top() + st::contactsPhotoSize + st::contactsPadding.bottom())
, _revokeWidth(st::normalFont->width(lang(lng_channels_too_much_public_revoke)))
, _revokeCallback(std::move(revokeCallback)) {
	setMouseTracking(true);

	resize(width(), 5 * _rowHeight);

	request(MTPchannels_GetAdminedPublicChannels(
		MTP_flags(0)
	)).done([=](const MTPmessages_Chats &result) {
		const auto &chats = result.match([](const auto &data) {
			return data.vchats.v;
		});
		for (const auto &chat : chats) {
			if (const auto peer = Auth().data().processChat(chat)) {
				if (!peer->isChannel() || peer->userName().isEmpty()) {
					continue;
				}

				auto row = ChatRow(peer);
				row.peer = peer;
				row.name.setText(
					st::contactsNameStyle,
					peer->name,
					Ui::NameTextOptions());
				row.status.setText(
					st::defaultTextStyle,
					Core::App().createInternalLink(
						textcmdLink(1, peer->userName())),
					Ui::DialogTextOptions());
				_rows.push_back(std::move(row));
			}
		}
		resize(width(), _rows.size() * _rowHeight);
		update();
	}).send();
}

RevokePublicLinkBox::RevokePublicLinkBox(
	QWidget*,
	Fn<void()> revokeCallback)
: _aboutRevoke(
	this,
	lang(lng_channels_too_much_public_about),
	st::aboutRevokePublicLabel)
, _revokeCallback(std::move(revokeCallback)) {
}

void RevokePublicLinkBox::prepare() {
	_innerTop = st::boxPadding.top() + _aboutRevoke->height() + st::boxPadding.top();
	_inner = setInnerWidget(object_ptr<Inner>(this, [=] {
		const auto callback = _revokeCallback;
		closeBox();
		if (callback) {
			callback();
		}
	}), st::boxLayerScroll, _innerTop);

	addButton(langFactory(lng_cancel), [=] { closeBox(); });

	subscribe(Auth().downloaderTaskFinished(), [=] { update(); });

	_inner->resizeToWidth(st::boxWideWidth);
	setDimensions(st::boxWideWidth, _innerTop + _inner->height());
}

void RevokePublicLinkBox::Inner::mouseMoveEvent(QMouseEvent *e) {
	updateSelected();
}

void RevokePublicLinkBox::Inner::updateSelected() {
	auto point = mapFromGlobal(QCursor::pos());
	PeerData *selected = nullptr;
	auto top = _rowsTop;
	for_const (auto &row, _rows) {
		auto revokeLink = rtlrect(width() - st::contactsPadding.right() - st::contactsCheckPosition.x() - _revokeWidth, top + st::contactsPadding.top() + (st::contactsPhotoSize - st::normalFont->height) / 2, _revokeWidth, st::normalFont->height, width());
		if (revokeLink.contains(point)) {
			selected = row.peer;
			break;
		}
		top += _rowHeight;
	}
	if (selected != _selected) {
		_selected = selected;
		setCursor((_selected || _pressed) ? style::cur_pointer : style::cur_default);
		update();
	}
}

void RevokePublicLinkBox::Inner::mousePressEvent(QMouseEvent *e) {
	if (_pressed != _selected) {
		_pressed = _selected;
		update();
	}
}

void RevokePublicLinkBox::Inner::mouseReleaseEvent(QMouseEvent *e) {
	auto pressed = base::take(_pressed);
	setCursor((_selected || _pressed) ? style::cur_pointer : style::cur_default);
	if (pressed && pressed == _selected) {
		auto text_method = pressed->isMegagroup() ? lng_channels_too_much_public_revoke_confirm_group : lng_channels_too_much_public_revoke_confirm_channel;
		auto text = text_method(lt_link, Core::App().createInternalLink(pressed->userName()), lt_group, pressed->name);
		auto confirmText = lang(lng_channels_too_much_public_revoke);
		_weakRevokeConfirmBox = Ui::show(Box<ConfirmBox>(text, confirmText, crl::guard(this, [this, pressed]() {
			if (_revokeRequestId) return;
			_revokeRequestId = request(MTPchannels_UpdateUsername(
				pressed->asChannel()->inputChannel,
				MTP_string("")
			)).done([=](const MTPBool &result) {
				const auto callback = _revokeCallback;
				if (_weakRevokeConfirmBox) {
					_weakRevokeConfirmBox->closeBox();
				}
				if (callback) {
					callback();
				}
			}).send();
		})), LayerOption::KeepOther);
	}
}

void RevokePublicLinkBox::Inner::paintEvent(QPaintEvent *e) {
	Painter p(this);
	p.translate(0, _rowsTop);
	for_const (auto &row, _rows) {
		paintChat(p, row, (row.peer == _selected));
		p.translate(0, _rowHeight);
	}
}

void RevokePublicLinkBox::resizeEvent(QResizeEvent *e) {
	BoxContent::resizeEvent(e);

	_aboutRevoke->moveToLeft(st::boxPadding.left(), st::boxPadding.top());
}

void RevokePublicLinkBox::Inner::paintChat(Painter &p, const ChatRow &row, bool selected) const {
	auto peer = row.peer;
	peer->paintUserpicLeft(p, st::contactsPadding.left(), st::contactsPadding.top(), width(), st::contactsPhotoSize);

	p.setPen(st::contactsNameFg);

	int32 namex = st::contactsPadding.left() + st::contactsPhotoSize + st::contactsPadding.left();
	int32 namew = width() - namex - st::contactsPadding.right() - (_revokeWidth + st::contactsCheckPosition.x() * 2);
	if (peer->isVerified()) {
		auto icon = &st::dialogsVerifiedIcon;
		namew -= icon->width();
		icon->paint(p, namex + qMin(row.name.maxWidth(), namew), st::contactsPadding.top() + st::contactsNameTop, width());
	}
	row.name.drawLeftElided(p, namex, st::contactsPadding.top() + st::contactsNameTop, namew, width());

	p.setFont(selected ? st::linkOverFont : st::linkFont);
	p.setPen(selected ? st::defaultLinkButton.overColor : st::defaultLinkButton.color);
	p.drawTextRight(st::contactsPadding.right() + st::contactsCheckPosition.x(), st::contactsPadding.top() + (st::contactsPhotoSize - st::normalFont->height) / 2, width(), lang(lng_channels_too_much_public_revoke), _revokeWidth);

	p.setPen(st::contactsStatusFg);
	p.setTextPalette(st::revokePublicLinkStatusPalette);
	row.status.drawLeftElided(p, namex, st::contactsPadding.top() + st::contactsStatusTop, namew, width());
	p.restoreTextPalette();
}