Method createChannel

Telegram/SourceFiles/boxes/add_contact_box.cpp:820–899

}

void GroupInfoBox::createChannel(
		const QString &title,
		const QString &description) {
	Expects(!_creationRequestId);

	using Flag = MTPchannels_CreateChannel::Flag;
	const auto flags = Flag()
		| ((_type == Type::Megagroup || _type == Type::Forum)
			? Flag::f_megagroup
			: Flag::f_broadcast)
		| ((_type == Type::Forum) ? Flag::f_forum : Flag())
		| ((_type == Type::Megagroup)
			? MTPchannels_CreateChannel::Flag::f_ttl_period
			: MTPchannels_CreateChannel::Flags(0));
	const auto ttl = ttlPeriod();
	_creationRequestId = _api.request(MTPchannels_CreateChannel(
		MTP_flags(flags),
		MTP_string(title),
		MTP_string(description),
		MTPInputGeoPoint(), // geo_point
		MTPstring(), // address
		MTP_int((_type == Type::Megagroup) ? ttl : 0)
	)).done([=](const MTPUpdates &result) {
		_navigation->session().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 _navigation->session().data().channel(
					chats->front().c_channel().vid());
			}
			| [&](not_null<ChannelData*> channel) {
				auto image = _photo->takeResultImage();
				if (!image.isNull()) {
					channel->session().api().peerPhoto().upload(
						channel,
						{ std::move(image) });
				}
				if (ttl && channel->isMegagroup()) {
					channel->setMessagesTTL(ttl);
				}
				channel->session().api().requestFullPeer(channel);