namespace Xmpp.Xep.MessageDeliveryReceipts { private const string NS_URI = "urn:xmpp:receipts"; public class Module : XmppStreamModule { public static ModuleIdentity IDENTITY = new ModuleIdentity(NS_URI, "0184_message_delivery_receipts"); public signal void receipt_received(XmppStream stream, Jid jid, string id); private SendPipelineListener send_pipeline_listener = new SendPipelineListener(); public void send_received(XmppStream stream, Jid from, string message_id) { MessageStanza received_message = new MessageStanza(); received_message.to = from; received_message.stanza.put_node(new StanzaNode.build("received", NS_URI).add_self_xmlns().put_attribute("id", message_id)); stream.get_module(MessageModule.IDENTITY).send_message.begin(stream, received_message); } public static bool requests_receipt(MessageStanza message) { return message.stanza.get_subnode("request", NS_URI) != null; } public override void attach(XmppStream stream) { stream.get_module(ServiceDiscovery.Module.IDENTITY).add_feature(stream, NS_URI); stream.get_module(MessageModule.IDENTITY).received_message.connect(received_message); stream.get_module(MessageModule.IDENTITY).send_pipeline.connect(send_pipeline_listener); } public override void detach(XmppStream stream) { stream.get_module(MessageModule.IDENTITY).received_message.disconnect(received_message); stream.get_module(MessageModule.IDENTITY).send_pipeline.disconnect(send_pipeline_listener); } public override string get_ns() { return NS_URI; } public override string get_id() { return IDENTITY.id; } private void received_message(XmppStream stream, MessageStanza message) { StanzaNode? received_node = message.stanza.get_subnode("received", NS_URI); if (received_node != null) { receipt_received(stream, message.from, received_node.get_attribute("id", NS_URI)); } } } public class SendPipelineListener : StanzaListener { private const string[] after_actions_const = {}; public override string action_group { get { return "ADD_NODES"; } } public override string[] after_actions { get { return after_actions_const; } } public override async bool run(XmppStream stream, MessageStanza message) { StanzaNode? received_node = message.stanza.get_subnode("received", NS_URI); if (received_node != null) return false; if (message.body == null) return false; if (message.type_ == MessageStanza.TYPE_GROUPCHAT) return false; message.stanza.put_node(new StanzaNode.build("request", NS_URI).add_self_xmlns()); return false; } } }