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using Xmpp.Core;
namespace Xmpp.Xep.MessageDeliveryReceipts {
private const string NS_URI = "urn:xmpp:receipts";
public class Module : XmppStreamModule {
public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(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());
}
}
}
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