1 files changed, 45 insertions, 0 deletions
diff --git a/xmpp-vala/src/module/xep/0421_occupant_ids.vala b/xmpp-vala/src/module/xep/0421_occupant_ids.vala
new file mode 100644
index 00000000..ce9f2471
--- /dev/null
+++ b/xmpp-vala/src/module/xep/0421_occupant_ids.vala
@@ -0,0 +1,45 @@
+namespace Xmpp.Xep.OccupantIds {
+
+public const string NS_URI = "urn:xmpp:occupant-id:0";
+
+public static string? get_occupant_id(StanzaNode stanza) {
+    StanzaNode? node = stanza.get_subnode("occupant-id", NS_URI);
+    if (node == null) return null;
+
+    return node.get_attribute("id");
+}
+
+public class Module : XmppStreamModule {
+    public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "0421_occupant_ids");
+
+    public signal void received_occupant_id(XmppStream stream, Jid jid, string occupant_id);
+    public signal void received_own_occupant_id(XmppStream stream, Jid jid, string occupant_id);
+
+    public override void attach(XmppStream stream) {
+        stream.get_module(Presence.Module.IDENTITY).received_available.connect(parse_occupant_id_from_presence);
+    }
+
+    public override void detach(XmppStream stream) {
+        stream.get_module(Presence.Module.IDENTITY).received_available.disconnect(parse_occupant_id_from_presence);
+    }
+
+    public override string get_ns() { return NS_URI; }
+    public override string get_id() { return IDENTITY.id; }
+
+    public void parse_occupant_id_from_presence(XmppStream stream, Presence.Stanza presence) {
+        string? occupant_id = get_occupant_id(presence.stanza);
+        if (occupant_id == null) return;
+
+        received_occupant_id(stream, presence.from, occupant_id);
+
+        StanzaNode? x_node = presence.stanza.get_subnode("x", "http://jabber.org/protocol/muc#user");
+        if (x_node == null) return;
+        foreach (StanzaNode status_node in x_node.get_subnodes("status", "http://jabber.org/protocol/muc#user")) {
+            if (int.parse(status_node.get_attribute("code")) == 110) {
+                received_own_occupant_id(stream, presence.from, occupant_id);
+            }
+        }
+    }
+}
+
+}