1 files changed, 74 insertions, 0 deletions
diff --git a/xmpp-vala/src/module/xep/0444_reactions.vala b/xmpp-vala/src/module/xep/0444_reactions.vala
new file mode 100644
index 00000000..90d922d1
--- /dev/null
+++ b/xmpp-vala/src/module/xep/0444_reactions.vala
@@ -0,0 +1,74 @@
+using Gee;
+
+namespace Xmpp.Xep.Reactions {
+
+public const string NS_URI = "urn:xmpp:reactions:0";
+
+public class Module : XmppStreamModule {
+    public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "reactions");
+
+    public signal void received_reactions(XmppStream stream, Jid from_jid, string message_id, Gee.List<string> reactions, MessageStanza stanza);
+
+    private ReceivedPipelineListener received_pipeline_listener = new ReceivedPipelineListener();
+
+    public void send_reaction(XmppStream stream, Jid jid, string stanza_type, string message_id, Gee.List<string> reactions) {
+        StanzaNode reactions_node = new StanzaNode.build("reactions", NS_URI).add_self_xmlns();
+        reactions_node.put_attribute("to", message_id);
+        foreach (string reaction in reactions) {
+            StanzaNode reaction_node = new StanzaNode.build("reaction", NS_URI);
+            reaction_node.put_node(new StanzaNode.text(reaction));
+            reactions_node.put_node(reaction_node);
+        }
+
+        MessageStanza message = new MessageStanza() { to=jid, type_=stanza_type };
+        message.stanza.put_node(reactions_node);
+
+        MessageProcessingHints.set_message_hint(message, MessageProcessingHints.HINT_STORE);
+
+        stream.get_module(MessageModule.IDENTITY).send_message.begin(stream, message);
+    }
+
+    public override void attach(XmppStream stream) {
+        stream.get_module(ServiceDiscovery.Module.IDENTITY).add_feature(stream, NS_URI);
+        stream.get_module(MessageModule.IDENTITY).received_pipeline.connect(received_pipeline_listener);
+    }
+
+    public override void detach(XmppStream stream) {
+        stream.get_module(ServiceDiscovery.Module.IDENTITY).remove_feature(stream, NS_URI);
+        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<MessageStanza> {
+
+    private const string[] after_actions_const = {"EXTRACT_MESSAGE_2"};
+
+    public override string action_group { get { return ""; } }
+    public override string[] after_actions { get { return after_actions_const; } }
+
+    public override async bool run(XmppStream stream, MessageStanza message) {
+        StanzaNode? reactions_node = message.stanza.get_subnode("reactions", NS_URI);
+        if (reactions_node == null) return false;
+
+        string? to_attribute = reactions_node.get_attribute("to");
+        if (to_attribute == null) return false;
+
+        Gee.List<string> reactions = new ArrayList<string>();
+        foreach (StanzaNode reaction_node in reactions_node.get_subnodes("reaction", NS_URI)) {
+            string? reaction = reaction_node.get_string_content();
+            if (reaction == null) return false;
+
+            if (!reactions.contains(reaction)) {
+                reactions.add(reaction);
+            }
+        }
+        stream.get_module(Module.IDENTITY).received_reactions(stream, message.from, to_attribute, reactions, message);
+
+        return false;
+    }
+}
+
+}