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namespace Xmpp.Xep.MessageCarbons {
public const string NS_URI = "urn:xmpp:carbons:2";
public class Module : XmppStreamModule {
public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "0280_message_carbons_module");
private ReceivedPipelineListener received_pipeline_listener = new ReceivedPipelineListener();
public async void enable(XmppStream stream) {
if (stream.get_flag(Flag.IDENTITY) == null) {
Iq.Stanza iq = new Iq.Stanza.set(new StanzaNode.build("enable", NS_URI).add_self_xmlns());
try {
yield stream.get_module(Iq.Module.IDENTITY).send_iq_async(stream, iq);
} catch (IOError e) {
warning("Failed enabling carbons: %s", e.message);
}
}
}
public async void disable(XmppStream stream) {
Iq.Stanza iq = new Iq.Stanza.set(new StanzaNode.build("disable", NS_URI).add_self_xmlns());
try {
yield stream.get_module(Iq.Module.IDENTITY).send_iq_async(stream, iq);
} catch (IOError e) {
warning("Failed enabling carbons: %s", e.message);
}
}
public override void attach(XmppStream stream) {
stream.stream_negotiated.connect(enable);
stream.get_module(MessageModule.IDENTITY).received_pipeline.connect(received_pipeline_listener);
stream.get_module(ServiceDiscovery.Module.IDENTITY).add_feature(stream, NS_URI);
}
public override void detach(XmppStream stream) {
stream.stream_negotiated.disconnect(enable);
stream.get_module(MessageModule.IDENTITY).received_pipeline.disconnect(received_pipeline_listener);
stream.get_module(ServiceDiscovery.Module.IDENTITY).remove_feature(stream, NS_URI);
}
public override string get_ns() {
return NS_URI;
}
public override string get_id() {
return IDENTITY.id;
}
}
public class ReceivedPipelineListener : StanzaListener<MessageStanza> {
private string[] after_actions_const = {"EXTRACT_MESSAGE_1"};
public override string action_group { get { return "EXTRACT_MESSAGE_2"; } }
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);
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", Xmpp.NS_URI);
// 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 (!message.from.equals(stream.get_flag(Bind.Flag.IDENTITY).my_jid.bare_jid)) {
warning("Received alleged carbon message from %s, ignoring", message.from.to_string());
return true;
}
if (message_node == null) {
warning("Received a carbon message with no message subnode in jabber:client namespace from %s, ignoring", message.from.to_string());
return true;
}
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;
}
}
return false;
}
}
public class MessageFlag : Xmpp.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(MessageStanza message) {
return (MessageFlag) message.get_flag(NS_URI, ID);
}
public override string get_ns() { return NS_URI; }
public override string get_id() { return ID; }
}
public class Flag : Xmpp.XmppStreamFlag {
public static FlagIdentity<Flag> IDENTITY = new FlagIdentity<Flag>(NS_URI, "carbons");
public override string get_ns() { return NS_URI; }
public override string get_id() { return IDENTITY.id; }
}
public class Bind2Activation : Bind2.Bind2InlineActivation {
public override StanzaNode? get_activation_node(XmppStream stream) {
stream.add_flag(new Flag());
return new StanzaNode.build("enable", NS_URI).add_self_xmlns();
}
public override void on_bound(XmppStream stream, StanzaNode bound_node) {
// There is no "enabled" node for carbons
}
}
}
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