namespace Xmpp.Xep.UniqueStableStanzaIDs { private const string NS_URI = "urn:xmpp:sid:0"; private const string HINT_NO_PERMANENT_STORE = "no-permanent-store"; private const string HINT_NO_STORE = "no-store"; private const string HINT_NO_COPY = "no-copy"; private const string HINT_STORE = "store"; public class Module : XmppStreamModule { public static ModuleIdentity IDENTITY = new ModuleIdentity(NS_URI, "0359_unique_and_stable_stanza_ids"); public override void attach(XmppStream stream) { stream.get_module(ServiceDiscovery.Module.IDENTITY).add_feature(stream, NS_URI); } public override void detach(XmppStream stream) { 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 static void set_origin_id(MessageStanza message, string origin_id) { StanzaNode hint_node = (new StanzaNode.build("origin-id", NS_URI)).add_self_xmlns().put_attribute("id", origin_id); message.stanza.put_node(hint_node); } public static string? get_origin_id(MessageStanza message) { StanzaNode? node = message.stanza.get_subnode("origin-id", NS_URI); if (node == null) return null; return node.get_attribute("id"); } public static string? get_stanza_id(MessageStanza message, Jid by) { string by_str = by.to_string(); foreach (StanzaNode node in message.stanza.get_subnodes("stanza-id", NS_URI)) { if (node.get_attribute("by") == by_str) { return node.get_attribute("id"); } } return null; } }