namespace Xmpp.Xep.DelayedDelivery { private const string NS_URI = "urn:xmpp:delay"; public static DateTime? get_time_for_node(StanzaNode node) { string? time = node.get_attribute("stamp"); if (time != null) return DateTimeProfiles.parse_string(time); return null; } public static DateTime? get_time_for_message(MessageStanza message, Jid? jid = null) { foreach (StanzaNode delay_node in message.stanza.get_subnodes("delay", NS_URI)) { if (jid == null || delay_node.get_attribute("from") == jid.to_string()) { return get_time_for_node(delay_node); } } return null; } public class Module : XmppStreamModule { public static ModuleIdentity IDENTITY = new ModuleIdentity(NS_URI, "0203_delayed_delivery"); private ReceivedPipelineListener received_pipeline_listener = new ReceivedPipelineListener(); public static void set_message_delay(MessageStanza message, DateTime datetime) { StanzaNode delay_node = (new StanzaNode.build("delay", NS_URI)).add_self_xmlns(); delay_node.put_attribute("stamp", DateTimeProfiles.to_datetime(datetime)); message.stanza.put_node(delay_node); } public override void attach(XmppStream stream) { stream.get_module(MessageModule.IDENTITY).received_pipeline.connect(received_pipeline_listener); } public override void detach(XmppStream stream) { stream.get_module(MessageModule.IDENTITY).received_pipeline.disconnect(received_pipeline_listener); } public override string get_ns() { return NS_URI; } public override string get_id() { return IDENTITY.id; } } public class ReceivedPipelineListener : StanzaListener { private const string[] after_actions_const = {}; public override string action_group { get { return "ADD_NODE"; } } public override string[] after_actions { get { return after_actions_const; } } public override async bool run(XmppStream stream, MessageStanza message) { DateTime? datetime = get_time_for_message(message); if (datetime != null) message.add_flag(new MessageFlag(datetime)); return false; } } public class MessageFlag : Xmpp.MessageFlag { public const string ID = "delayed_delivery"; public DateTime datetime { get; private set; } public MessageFlag(DateTime datetime) { this.datetime = datetime; } 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; } } }