1 files changed, 46 insertions, 0 deletions
diff --git a/xmpp-vala/src/module/xep/0359_unique_stable_stanza_ids.vala b/xmpp-vala/src/module/xep/0359_unique_stable_stanza_ids.vala
new file mode 100644
index 00000000..b6defc6d
--- /dev/null
+++ b/xmpp-vala/src/module/xep/0359_unique_stable_stanza_ids.vala
@@ -0,0 +1,46 @@
+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<Module> IDENTITY = new ModuleIdentity<Module>(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) {}
+
+    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;
+}
+
+}