Added implementation for XEP-0128 Service Discovery Extensions.

Uses the alt_0004 plugin for jabber❌data stanza objects.

sleekxmpp/plugins/xep_0128.py

@@ -0,0 +1,51 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010 Nathanael C. Fritz, Lance J.T. Stout
+    This file is part of SleekXMPP.
+
+    See the file license.txt for copying permission.
+"""
+
+import logging
+from . import base
+from .. xmlstream.handler.callback import Callback
+from .. xmlstream.matcher.xpath import MatchXPath
+from .. xmlstream.stanzabase import ElementBase, ET, JID
+from .. stanza.iq import Iq
+from . xep_0030 import DiscoInfo, DiscoItems
+from . alt_0004 import Form
+
+
+class xep_0128(base.base_plugin):
+    """
+    XEP-0128 Service Discovery Extensions
+    """
+	
+    def plugin_init(self):
+        self.xep = '0128'
+        self.description = 'Service Discovery Extensions'
+
+        self.xmpp.stanzaPlugin(DiscoInfo, Form)
+        self.xmpp.stanzaPlugin(DiscoItems, Form)
+
+    def extend_info(self, node, data=None):
+        if data is None:
+            data = {}
+        node = self.xmpp['xep_0030'].nodes.get(node, None)
+        if node is None:
+            self.xmpp['xep_0030'].add_node(node)
+        
+        info = node.info
+        info['form']['type'] = 'result'
+        info['form'].setFields(data, default=None)
+
+    def extend_items(self, node, data=None):
+        if data is None:
+            data = {}
+        node = self.xmpp['xep_0030'].nodes.get(node, None)
+        if node is None:
+            self.xmpp['xep_0030'].add_node(node)
+        
+        items = node.items
+        items['form']['type'] = 'result'
+        items['form'].setFields(data, default=None)