private static void SubscribePreviousConnection(Guid key, MqttClientAuthenticateResult result)
{
if (!result.IsSessionPresent)
{
return;
}
for (int i = 0; i < result.UserProperties.Count; i++)
{
MqttUserProperty prop = result.UserProperties[i];
if (prop.Name == "subscriptions")
{
using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(prop.Value)))
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(SubscriptionList));
SubscriptionList list = (SubscriptionList)serializer.ReadObject(ms);
foreach (PreviousSubscription subscription in list)
{
MqttClient client = GetClient(key);
string gxproc = client.GetProc(subscription.topic);
if (!string.IsNullOrEmpty(gxproc))
{
Subscribe(key, subscription.topic, gxproc, subscription.qos);
}
}
}
}
}
}
/// <summary>
/// Adds the user property to the unsubscribe options.
/// Hint: MQTT 5 feature only.
/// </summary>
/// <param name="userProperty">The user property.</param>
/// <returns>A new instance of the <see cref="MqttClientUnsubscribeOptionsBuilder"/> class.</returns>
public MqttClientUnsubscribeOptionsBuilder WithUserProperty(MqttUserProperty userProperty)
{
if (userProperty is null)
{
throw new ArgumentNullException(nameof(userProperty));
}
if (_unsubscribeOptions.UserProperties is null)
{
_unsubscribeOptions.UserProperties = new List <MqttUserProperty>();
}
_unsubscribeOptions.UserProperties.Add(userProperty);
return(this);
}