/// <inheritdoc />
public Task PublishAsync(PublishedMessage message, CancellationToken cancel)
{
if (tracker.RecentlySeen(message.MessageId))
return Task.CompletedTask;
// Find a set of peers that are interested in the topic(s).
// Exclude author and sender
var peers = message.Topics
.SelectMany(topic => RemoteTopics.GetPeers(topic))
.Where(peer => peer != message.Sender)
.Where(peer => peer != message.Forwarder);
// Forward the message.
var forward = new PubSubMessage
{
PublishedMessages = new PublishedMessage[] { message }
};
return SendAsync(forward, peers, cancel);
}
/// <inheritdoc />
public IEnumerable<Peer> InterestedPeers(string topic)
{
return RemoteTopics.GetPeers(topic);
}