Method empty

Telegram/SourceFiles/data/data_download_manager.cpp:135–142

DownloadManager::~DownloadManager() = default;

bool DownloadManager::empty() const {
	for (const auto &[session, data] : _sessions) {
		if (!data.downloading.empty() || !data.downloaded.empty()) {
			return false;
		}
	}
	return true;
}

void DownloadManager::trackSession(not_null<Main::Session*> session) {
	auto &data = _sessions.emplace(session, SessionData()).first->second;