--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libervia/backend/plugins/plugin_xep_0297.py	Fri Jun 02 11:49:51 2023 +0200
@@ -0,0 +1,124 @@
+#!/usr/bin/env python3
+
+
+# SAT plugin for Stanza Forwarding (XEP-0297)
+# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
+# Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from libervia.backend.core.constants import Const as C
+from libervia.backend.core.i18n import _, D_
+from libervia.backend.core.log import getLogger
+
+from twisted.internet import defer
+
+log = getLogger(__name__)
+
+from wokkel import disco, iwokkel
+
+try:
+    from twisted.words.protocols.xmlstream import XMPPHandler
+except ImportError:
+    from wokkel.subprotocols import XMPPHandler
+from zope.interface import implementer
+
+from twisted.words.xish import domish
+
+PLUGIN_INFO = {
+    C.PI_NAME: "Stanza Forwarding",
+    C.PI_IMPORT_NAME: "XEP-0297",
+    C.PI_TYPE: "XEP",
+    C.PI_PROTOCOLS: ["XEP-0297"],
+    C.PI_MAIN: "XEP_0297",
+    C.PI_HANDLER: "yes",
+    C.PI_DESCRIPTION: D_("""Implementation of Stanza Forwarding"""),
+}
+
+
+class XEP_0297(object):
+    # FIXME: check this implementation which doesn't seems to be used
+
+    def __init__(self, host):
+        log.info(_("Stanza Forwarding plugin initialization"))
+        self.host = host
+
+    def get_handler(self, client):
+        return XEP_0297_handler(self, client.profile)
+
+    @classmethod
+    def update_uri(cls, element, uri):
+        """Update recursively the element URI.
+
+        @param element (domish.Element): element to update
+        @param uri (unicode): new URI
+        """
+        # XXX: we need this because changing the URI of an existing element
+        # containing children doesn't update the children's blank URI.
+        element.uri = uri
+        element.defaultUri = uri
+        for child in element.children:
+            if isinstance(child, domish.Element) and not child.uri:
+                XEP_0297.update_uri(child, uri)
+
+    def forward(self, stanza, to_jid, stamp, body="", profile_key=C.PROF_KEY_NONE):
+        """Forward a message to the given JID.
+
+        @param stanza (domish.Element): original stanza to be forwarded.
+        @param to_jid (JID): recipient JID.
+        @param stamp (datetime): offset-aware timestamp of the original reception.
+        @param body (unicode): optional description.
+        @param profile_key (unicode): %(doc_profile_key)s
+        @return: a Deferred when the message has been sent
+        """
+        # FIXME: this method is not used and doesn't use mess_data which should be used for client.send_message_data
+        #        should it be deprecated? A method constructing the element without sending it seems more natural
+        log.warning(
+            "THIS METHOD IS DEPRECATED"
+        )  #  FIXME: we use this warning until we check the method
+        msg = domish.Element((None, "message"))
+        msg["to"] = to_jid.full()
+        msg["type"] = stanza["type"]
+
+        body_elt = domish.Element((None, "body"))
+        if body:
+            body_elt.addContent(body)
+
+        forwarded_elt = domish.Element((C.NS_FORWARD, "forwarded"))
+        delay_elt = self.host.plugins["XEP-0203"].delay(stamp)
+        forwarded_elt.addChild(delay_elt)
+        if not stanza.uri:  # None or ''
+            XEP_0297.update_uri(stanza, "jabber:client")
+        forwarded_elt.addChild(stanza)
+
+        msg.addChild(body_elt)
+        msg.addChild(forwarded_elt)
+
+        client = self.host.get_client(profile_key)
+        return defer.ensureDeferred(client.send_message_data({"xml": msg}))
+
+
+@implementer(iwokkel.IDisco)
+class XEP_0297_handler(XMPPHandler):
+
+    def __init__(self, plugin_parent, profile):
+        self.plugin_parent = plugin_parent
+        self.host = plugin_parent.host
+        self.profile = profile
+
+    def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
+        return [disco.DiscoFeature(C.NS_FORWARD)]
+
+    def getDiscoItems(self, requestor, target, nodeIdentifier=""):
+        return []