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using Xmpp.Core;
namespace Xmpp.Xep.MessageCarbons {
private const string NS_URI = "urn:xmpp:carbons:2";
public class Module : XmppStreamModule {
public const string ID = "0280_message_carbons_module";
public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, ID);
public void enable(XmppStream stream) {
Iq.Stanza iq = new Iq.Stanza.set(new StanzaNode.build("enable", NS_URI).add_self_xmlns());
Iq.Module.get_module(stream).send_iq(stream, iq);
}
public void disable(XmppStream stream) {
Iq.Stanza iq = new Iq.Stanza.set(new StanzaNode.build("disable", NS_URI).add_self_xmlns());
Iq.Module.get_module(stream).send_iq(stream, iq);
}
public override void attach(XmppStream stream) {
Bind.Module.require(stream);
Iq.Module.require(stream);
Message.Module.require(stream);
ServiceDiscovery.Module.require(stream);
stream.stream_negotiated.connect(enable);
Message.Module.get_module(stream).pre_received_message.connect(pre_received_message);
ServiceDiscovery.Module.get_module(stream).add_feature(stream, NS_URI);
}
public override void detach(XmppStream stream) {
stream.stream_negotiated.disconnect(enable);
Message.Module.get_module(stream).pre_received_message.disconnect(pre_received_message);
}
public static Module? get_module(XmppStream stream) {
return (Module?) stream.get_module(IDENTITY);
}
public static void require(XmppStream stream) {
if (get_module(stream) == null) stream.add_module(new Module());
}
public override string get_ns() { return NS_URI; }
public override string get_id() { return ID; }
private void pre_received_message(XmppStream stream, Message.Stanza message) {
StanzaNode? received_node = message.stanza.get_subnode("received", NS_URI);
StanzaNode? sent_node = received_node == null ? message.stanza.get_subnode("sent", NS_URI) : null;
StanzaNode? carbons_node = received_node != null ? received_node : sent_node;
if (carbons_node != null) {
StanzaNode? forwarded_node = carbons_node.get_subnode("forwarded", "urn:xmpp:forward:0");
if (forwarded_node != null) {
StanzaNode? message_node = forwarded_node.get_subnode("message", Message.NS_URI);
string? from_attribute = message_node.get_attribute("from", Message.NS_URI);
// The security model assumed by this document is that all of the resources for a single user are in the same trust boundary.
// Any forwarded copies received by a Carbons-enabled client MUST be from that user's bare JID; any copies that do not meet this requirement MUST be ignored.
if (from_attribute != null && from_attribute == get_bare_jid(Bind.Flag.get_flag(stream).my_jid)) {
if (received_node != null) {
message.add_flag(new MessageFlag(MessageFlag.TYPE_RECEIVED));
} else if (sent_node != null) {
message.add_flag(new MessageFlag(MessageFlag.TYPE_SENT));
}
message.stanza = message_node;
message.rerun_parsing = true;
}
message.stanza = message_node;
message.rerun_parsing = true;
}
}
}
}
public class MessageFlag : Message.MessageFlag {
public const string id = "message_carbons";
public const string TYPE_RECEIVED = "received";
public const string TYPE_SENT = "sent";
private string type_;
public MessageFlag(string type) {
this.type_ = type;
}
public static MessageFlag? get_flag(Message.Stanza message) {
return (MessageFlag) message.get_flag(NS_URI, id);
}
public override string get_ns() { return NS_URI; }
public override string get_id() { return id; }
}
}
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