using Xmpp.Core; 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, string jid, string id); public override void attach(XmppStream stream) { ServiceDiscovery.Module.require(stream); Message.Module.require(stream); stream.get_module(ServiceDiscovery.Module.IDENTITY).add_feature(stream, NS_URI); stream.get_module(Message.Module.IDENTITY).received_message.connect(received_message); stream.get_module(Message.Module.IDENTITY).pre_send_message.connect(pre_send_message); } public override void detach(XmppStream stream) { stream.get_module(Message.Module.IDENTITY).received_message.disconnect(received_message); stream.get_module(Message.Module.IDENTITY).pre_send_message.disconnect(pre_send_message); } public static void require(XmppStream stream) { if (stream.get_module(IDENTITY) == null) stream.add_module(new Module()); } public override string get_ns() { return NS_URI; } public override string get_id() { return IDENTITY.id; } private void received_message(XmppStream stream, Message.Stanza 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)); } else if (message.stanza.get_subnode("request", NS_URI) != null) { send_received(stream, message); } } private void send_received(XmppStream stream, Message.Stanza message) { Message.Stanza received_message = new Message.Stanza(); received_message.to = message.from; received_message.stanza.put_node(new StanzaNode.build("received", NS_URI).add_self_xmlns().put_attribute("id", message.id)); stream.get_module(Message.Module.IDENTITY).send_message(stream, received_message); } private void pre_send_message(XmppStream stream, Message.Stanza message) { StanzaNode? received_node = message.stanza.get_subnode("received", NS_URI); if (received_node != null) return; if (message.body == null) return; if (message.type_ == Message.Stanza.TYPE_GROUPCHAT) return; message.stanza.put_node(new StanzaNode.build("request", NS_URI).add_self_xmlns()); } } }