Task <IEnumerable <Tuple <string, QoS, byte[]> > > IMqttStorageProvider.GetRetained(IEnumerable <KeyValuePair <string, DClark.MQTT.Messages.QoS> > subscriptions)
{
List <Tuple <string, QoS, byte[]> > result = new List <Tuple <string, QoS, byte[]> >();
foreach (var subscription in subscriptions)
{
string topicFilter = subscription.Key;
Dictionary <string, RetainedNode> possibles = new Dictionary <string, RetainedNode>();
possibles.Add("", retained);
RetainedNode node = retained;
Boolean includeChildren = false;
foreach (string fragment in topicFilter.Split('/'))
{
Dictionary <string, RetainedNode> next = new Dictionary <string, RetainedNode>();
if (fragment == "#" || fragment == "+")
{
foreach (var possible in possibles)
{
foreach (var child in possible.Value.children)
{
next.Add(possible.Key.Length == 0 ? child.Key : possible.Key + "/" + child.Key, child.Value);
}
}
includeChildren = fragment == "#";
}
else
{
foreach (var possible in possibles)
{
RetainedNode child;
if (possible.Value.children.TryGetValue(fragment, out child))
{
next.Add(possible.Key.Length == 0 ? fragment : possible.Key + "/" + fragment, child);
}
}
}
possibles = next;
}
foreach (var possible in possibles)
{
if (possible.Value.body != null)
{
result.Add(new Tuple <string, QoS, byte[]>(possible.Key, subscription.Value, possible.Value.body));
}
if (includeChildren)
{
AddRetainedRecursive(possible.Key, possible.Value, subscription.Value, result);
}
}
}
return(Util.RunSynchronously <IEnumerable <Tuple <string, QoS, byte[]> > >(() => result));
}
void AddRetainedRecursive(string topic, RetainedNode node, QoS qos, List <Tuple <string, QoS, byte[]> > result)
{
if (node.children == null)
{
return;
}
foreach (var child in node.children)
{
string childTopic = topic + "/" + child.Key;
if (child.Value.body != null)
{
result.Add(new Tuple <string, QoS, byte[]>(childTopic, qos, child.Value.body));
}
AddRetainedRecursive(childTopic, child.Value, qos, result);
}
}
Task IMqttStorageProvider.PutRetained(string topic, byte[] payload)
{
RetainedNode node = retained;
foreach (string fragment in topic.Split('/'))
{
RetainedNode next;
if (node.children == null)
{
node.children = new Dictionary <string, RetainedNode>();
node.children.Add(fragment, next = new RetainedNode());
}
else
{
if (!node.children.TryGetValue(fragment, out next))
{
node.children.Add(fragment, next = new RetainedNode());
}
}
node = next;
}
node.body = payload;
return(Util.CompletedTask);
}
