1 files changed, 125 insertions, 0 deletions
diff --git a/xmpp-vala/src/module/roster/module.vala b/xmpp-vala/src/module/roster/module.vala
new file mode 100644
index 00000000..c8b09710
--- /dev/null
+++ b/xmpp-vala/src/module/roster/module.vala
@@ -0,0 +1,125 @@
+using Gee;
+
+using Xmpp.Core;
+
+namespace Xmpp.Roster {
+    private const string NS_URI = "jabber:iq:roster";
+
+    public class Module : XmppStreamModule, Iq.Handler {
+        public const string ID = "roster_module";
+
+        public signal void received_roster(XmppStream stream, Collection<Item> roster);
+        public signal void item_removed(XmppStream stream, Item roster_item);
+        public signal void item_updated(XmppStream stream, Item roster_item);
+
+        public bool interested_resource = true;
+
+        /**
+         * Add a jid to the roster
+         */
+        public void add_jid(XmppStream stream, string jid, string? handle = null) {
+            Item roster_item = new Item();
+            roster_item.jid = jid;
+            if (handle != null) {
+                roster_item.name = handle;
+            }
+            roster_set(stream, roster_item);
+        }
+
+        /**
+         * Remove a jid from the roster
+         */
+        public void remove_jid(XmppStream stream, string jid) {
+            Item roster_item = new Item();
+            roster_item.jid = jid;
+            roster_item.subscription = Item.SUBSCRIPTION_REMOVE;
+
+            roster_set(stream, roster_item);
+        }
+
+        /**
+         * Set a handle for a jid
+         * @param   handle  Handle to be set. If null, any handle will be removed.
+         */
+        public void set_jid_handle(XmppStream stream, string jid, string? handle) {
+            Item roster_item = new Item();
+            roster_item.jid = jid;
+            if (handle != null) {
+                roster_item.name = handle;
+            }
+
+            roster_set(stream, roster_item);
+        }
+
+        public void on_iq_set(XmppStream stream, Iq.Stanza iq) {
+            StanzaNode? query_node = iq.stanza.get_subnode("query", NS_URI);
+            if (query_node == null) return;
+
+            Flag flag = Flag.get_flag(stream);
+            Item item = new Item.from_stanza_node(query_node.get_subnode("item", NS_URI));
+            switch (item.subscription) {
+                case Item.SUBSCRIPTION_REMOVE:
+                    flag.roster_items.unset(item.jid);
+                    item_removed(stream, item);
+                    break;
+                default:
+                    flag.roster_items[item.jid] = item;
+                    item_updated(stream, item);
+                    break;
+            }
+        }
+
+        public void on_iq_get(XmppStream stream, Iq.Stanza iq) { }
+
+        public static Module? get_module(XmppStream stream) {
+            return (Module?) stream.get_module(NS_URI, ID);
+        }
+
+        public static void require(XmppStream stream) {
+            if (get_module(stream) == null) stream.add_module(new Module());
+        }
+
+        public override void attach(XmppStream stream) {
+            Iq.Module.require(stream);
+            Iq.Module.get_module(stream).register_for_namespace(NS_URI, this);
+            Presence.Module.require(stream);
+            Presence.Module.get_module(stream).initial_presence_sent.connect(roster_get);
+            stream.add_flag(new Flag());
+        }
+
+        public override void detach(XmppStream stream) {
+            Presence.Module.get_module(stream).initial_presence_sent.disconnect(roster_get);
+        }
+
+        internal override string get_ns() { return NS_URI; }
+        internal override string get_id() { return ID; }
+
+        private void roster_get(XmppStream stream) {
+            Flag.get_flag(stream).iq_id = random_uuid();
+            StanzaNode query_node = new StanzaNode.build("query", NS_URI).add_self_xmlns();
+            Iq.Stanza iq = new Iq.Stanza.get(query_node, Flag.get_flag(stream).iq_id);
+            Iq.Module.get_module(stream).send_iq(stream, iq, new IqResponseListenerImpl());
+        }
+
+        private class IqResponseListenerImpl : Iq.ResponseListener, Object {
+            public void on_result(XmppStream stream, Iq.Stanza iq) {
+                Flag flag = Flag.get_flag(stream);
+                if (iq.id == flag.iq_id) {
+                    StanzaNode? query_node = iq.stanza.get_subnode("query", NS_URI);
+                    foreach (StanzaNode item_node in query_node.sub_nodes) {
+                        Item item = new Item.from_stanza_node(item_node);
+                        flag.roster_items[item.jid] = item;
+                    }
+                    Module.get_module(stream).received_roster(stream, flag.roster_items.values);
+                }
+            }
+        }
+
+        private void roster_set(XmppStream stream, Item roster_item) {
+            StanzaNode query_node = new StanzaNode.build("query", NS_URI).add_self_xmlns()
+                                    .put_node(roster_item.stanza_node);
+            Iq.Stanza iq = new Iq.Stanza.set(query_node);
+            Iq.Module.get_module(stream).send_iq(stream, iq, null);
+        }
+    }
+}