Method checkConnections

src/frontend/datasources/MQTTConnectionManagerWidget.cpp:526–565

! * \brief Checks whether every connection's settings are alright or not */

 * \brief Checks whether every connection's settings are alright or not
 */
bool MQTTConnectionManagerWidget::checkConnections() {
	if (m_connections.isEmpty())
		return true;

	bool connectionsOk = true;

	for (int i = 0; i < m_connections.size(); ++i) {
		auto& c1 = m_connections[i];
		auto equalNames = ui.lwConnections->findItems(c1.name, Qt::MatchExactly);
		bool nameOK = (!c1.name.isEmpty()) && (equalNames.size() == 1);

		bool authenticationUsed = c1.useAuthentication;
		bool idUsed = c1.useID;
		bool authenticationFilled = !c1.userName.isEmpty() && !c1.password.isEmpty();
		bool idFilled = !c1.clientID.isEmpty();
		bool authenticationOK = (!authenticationUsed || authenticationFilled);
		bool idOK = (!idUsed || idFilled);

		bool uniqueHost = true;
		for (int j = 0; j < m_connections.size(); ++j) {
			if (i == j)
				continue;
			auto& c2 = m_connections[j];

			if (c2.hostName == c1.hostName && c2.port == c1.port) {
				uniqueHost = false;
				break;
			}
		}
		bool hostOK = (!c1.hostName.isEmpty()) && uniqueHost;
		bool allOk = authenticationOK && idOK && hostOK && nameOK;

		if (!allOk) {
			connectionsOk = false;
			SET_WARNING_BACKGROUND(ui.lwConnections->item(i))
		} else
			ui.lwConnections->item(i)->setBackground(QBrush());
	}
	return connectionsOk;
}

/*!
 * \brief Provides a sample host name, which has to be changed before use.