std::string SlackUserRegistration::getTeamDomain(const std::string &token) {

	std::string url = "https://slack.com/api/team.info?token=" + Util::urlencode(token);

	rapidjson::Document resp;

	HTTPRequest req(HTTPRequest::Get, url);

	if (!req.execute(resp)) {

		LOG4CXX_ERROR(logger, url);

		LOG4CXX_ERROR(logger, req.getError());

		return "";

	}

	rapidjson::Value &team = resp["team"];

	if (!team.IsObject()) {

		LOG4CXX_ERROR(logger, "No 'team' object in the reply.");

		LOG4CXX_ERROR(logger, url);

		LOG4CXX_ERROR(logger, req.getRawData());

		return "";

	}

	rapidjson::Value &domain = team["domain"];

	if (!domain.IsString()) {

		LOG4CXX_ERROR(logger, "No 'domain' string in the reply.");

		LOG4CXX_ERROR(logger, url);

		LOG4CXX_ERROR(logger, req.getRawData());

		return "";

	}

	return domain.GetString();

}

std::string SlackUserRegistration::handleOAuth2Code(const std::string &code, const std::string &state) {

	OAuth2 *oauth2 = NULL;

	std::string token;

	std::vector<std::string> data;

	if (state == "use_bot_token") {

		token = code;

	}

	else {

		if (m_auths.find(state) != m_auths.end()) {

			oauth2 = m_auths[state];

			data = m_authsData[state];

		}

		else {

			return "Received state code '" + state + "' not found in state codes list.";

		}

		std::string error = oauth2->requestToken(code, token);

		if (!error.empty())  {

			return error;

		}

	}

	std::string domain = getTeamDomain(token);

	if (domain.empty()) {

		return "The token you have provided is invalid";

	}

	UserInfo user;

	user.uin = "";

	user.password = "";

	user.id = 0;

	m_storageBackend->getUser(domain, user);

	user.jid = domain;

	user.language = "en";

	user.encoding = "";

	user.vip = 0;

	registerUser(user, true);

	m_storageBackend->getUser(user.jid, user);

	std::string value = token;

	int type = (int) TYPE_STRING;

	m_storageBackend->getUserSetting(user.id, "bot_token", type, value);

	LOG4CXX_INFO(logger, "Registered Slack user " << user.jid);

	if (oauth2) {

		m_auths.erase(state);

		delete oauth2;

		m_authsData.erase(state);

	}

	m_component->getFrontend()->reconnectUser(user.jid);

	return "";

}

bool SlackUserRegistration::doUserRegistration(const UserInfo &row) {

	return true;

}