Initial work on adding support for XEP-0198

src/converse-smacks.js

+// Converse.js
+// http://conversejs.org
+//
+// Copyright (c) 2013-2018, the Converse.js developers
+// Licensed under the Mozilla Public License (MPLv2)
+
+/* This is a Converse.js plugin which add support for XEP-0198: Stream Management */
+
+(function (root, factory) {
+    define(["converse-core"], factory);
+}(this, function (converse, sizzle) {
+
+    const { Strophe, $build, _ } = converse.env;
+    Strophe.addNamespace('SM', 'urn:xmpp:sm:3');
+
+    converse.plugins.add('converse-smacks', {
+
+        initialize () {
+            const { _converse } = this;
+
+            function isStreamManagementSupported () {
+                return _converse.api.disco.stream.getFeature('sm', Strophe.NS.SM);
+            }
+
+            function enable () {
+                if (isStreamManagementSupported()) {
+
+                    const stanza = $build('enable', {
+                        'xmlns': Strophe.NS.SM,
+                        'resume': false
+                    });
+
+                    _converse.connection.send(stanza);
+                    _converse.connection.flush();
+                    _converse.connection.pause();
+                }
+            }
+
+            _converse.api.listen.on('streamFeaturesAdded', enable);
+
+        }
+    });
+
+}));