4 files changed, 84 insertions, 0 deletions
diff --git a/slixmpp/plugins/__init__.py b/slixmpp/plugins/__init__.py
index f948ead6..dce69083 100644
--- a/slixmpp/plugins/__init__.py
+++ b/slixmpp/plugins/__init__.py
@@ -93,5 +93,6 @@ __all__ = [
     'xep_0404',  # MIX-Anon
     'xep_0405',  # MIX-PAM
     'xep_0421',  # Anonymous unique occupant identifiers for MUCs
+    'xep_0422',  # Message Fastening
     'xep_0444',  # Message Reactions
 ]
diff --git a/slixmpp/plugins/xep_0422/__init__.py b/slixmpp/plugins/xep_0422/__init__.py
new file mode 100644
index 00000000..9a1575c1
--- /dev/null
+++ b/slixmpp/plugins/xep_0422/__init__.py
@@ -0,0 +1,13 @@
+"""
+    Slixmpp: The Slick XMPP Library
+    Copyright (C) 2020 Mathieu Pasquet <mathieui@mathieui.net>
+    This file is part of Slixmpp.
+
+    See the file LICENSE for copying permission.
+"""
+
+from slixmpp.plugins.base import register_plugin
+from slixmpp.plugins.xep_0422.stanza import *
+from slixmpp.plugins.xep_0422.fastening import XEP_0422
+
+register_plugin(XEP_0422)
diff --git a/slixmpp/plugins/xep_0422/fastening.py b/slixmpp/plugins/xep_0422/fastening.py
new file mode 100644
index 00000000..68560e16
--- /dev/null
+++ b/slixmpp/plugins/xep_0422/fastening.py
@@ -0,0 +1,28 @@
+"""
+    Slixmpp: The Slick XMPP Library
+    Copyright (C) 2020 Mathieu Pasquet <mathieui@mathieui.net>
+    This file is part of Slixmpp.
+
+    See the file LICENSE for copying permission.
+"""
+from slixmpp.plugins import BasePlugin
+from slixmpp.plugins.xep_0422 import stanza
+
+
+class XEP_0422(BasePlugin):
+    '''XEP-0422: Message Fastening'''
+
+    name = 'xep_0422'
+    description = 'Message Fastening'
+    dependencies = {'xep_0030'}
+    stanza = stanza
+    namespace = stanza.NS
+
+    def plugin_init(self) -> None:
+        stanza.register_plugins()
+
+    def session_bind(self, jid):
+        self.xmpp.plugin['xep_0030'].add_feature(feature=stanza.NS)
+
+    def plugin_end(self):
+        self.xmpp.plugin['xep_0030'].del_feature(feature=stanza.NS)
diff --git a/slixmpp/plugins/xep_0422/stanza.py b/slixmpp/plugins/xep_0422/stanza.py
new file mode 100644
index 00000000..a739809e
--- /dev/null
+++ b/slixmpp/plugins/xep_0422/stanza.py
@@ -0,0 +1,42 @@
+"""
+    Slixmpp: The Slick XMPP Library
+    Copyright (C) 2020 Mathieu Pasquet <mathieui@mathieui.net>
+    This file is part of Slixmpp.
+
+    See the file LICENSE for copying permissio
+"""
+
+from slixmpp.stanza import Message
+from slixmpp.xmlstream import (
+    ElementBase,
+    register_stanza_plugin,
+)
+
+
+NS = 'urn:xmpp:fasten:0'
+
+
+class ApplyTo(ElementBase):
+    namespace = NS
+    name = 'apply-to'
+    plugin_attrib = 'apply_to'
+    interfaces = {'id', 'shell'}
+
+    def set_shell(self, value: bool):
+        if value:
+            self.xml.attrib['shell'] = str(value).lower()
+        else:
+            if 'shell' in self.xml.attrib:
+                del self.xml.attrib['shell']
+
+
+class External(ElementBase):
+    namespace = NS
+    name = 'external'
+    plugin_attrib = 'external'
+    interfaces = {'name'}
+
+
+def register_plugins():
+    register_stanza_plugin(Message, ApplyTo)
+    register_stanza_plugin(ApplyTo, External)