plugin XEP-0297: first draft

src/plugins/plugin_xep_0297.py

@@ -0,0 +1,116 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# SAT plugin for Stanza Forwarding (XEP-0297)
+# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jérôme Poisson (goffi@goffi.org)
+# Copyright (C) 2013, 2014 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 sat.core.constants import Const as C
+from sat.core.i18n import _
+from sat.core.log import getLogger
+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 implements
+
+from twisted.words.xish import domish
+
+NS_SF = 'urn:xmpp:forward:0'
+
+PLUGIN_INFO = {
+    "name": "Stanza Forwarding",
+    "import_name": "XEP-0297",
+    "type": "XEP",
+    "protocols": ["XEP-0297"],
+    "main": "XEP_0297",
+    "handler": "yes",
+    "description": _("""Implementation of Stanza Forwarding""")
+}
+
+
+class XEP_0297(object):
+
+    def __init__(self, host):
+        log.info(_("Stanza Forwarding plugin initialization"))
+        self.host = host
+
+    def getHandler(self, profile):
+        return XEP_0297_handler(self, profile)
+
+    @classmethod
+    def updateUri(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.updateUri(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
+        """
+        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((NS_SF, 'forwarded'))
+        delay_elt = self.host.plugins['XEP-0203'].delay(stamp)
+        forwarded_elt.addChild(delay_elt)
+        if not stanza.uri:  # None or ''
+            XEP_0297.updateUri(stanza, 'jabber:client')
+        forwarded_elt.addChild(stanza)
+
+        msg.addChild(body_elt)
+        msg.addChild(forwarded_elt)
+
+        client = self.host.getClient(profile_key)
+        return client.xmlstream.send(msg.toXml())
+
+
+class XEP_0297_handler(XMPPHandler):
+    implements(iwokkel.IDisco)
+
+    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(NS_SF)]
+
+    def getDiscoItems(self, requestor, target, nodeIdentifier=''):
+        return []