--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libervia/backend/bridge/pb.py	Fri Jun 02 11:49:51 2023 +0200
@@ -0,0 +1,212 @@
+#!/usr/bin/env python3
+
+
+# SAT: a jabber client
+# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.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/>.
+
+
+import dataclasses
+from functools import partial
+from pathlib import Path
+from twisted.spread import jelly, pb
+from twisted.internet import reactor
+from libervia.backend.core.log import getLogger
+from libervia.backend.tools import config
+
+log = getLogger(__name__)
+
+
+## jelly hack
+# we monkey patch jelly to handle namedtuple
+ori_jelly = jelly._Jellier.jelly
+
+
+def fixed_jelly(self, obj):
+    """this method fix handling of namedtuple"""
+    if isinstance(obj, tuple) and not obj is tuple:
+        obj = tuple(obj)
+    return ori_jelly(self, obj)
+
+
+jelly._Jellier.jelly = fixed_jelly
+
+
+@dataclasses.dataclass(eq=False)
+class HandlerWrapper:
+    # we use a wrapper to keep signals handlers because RemoteReference doesn't support
+    # comparison (other than equality), making it unusable with a list
+    handler: pb.RemoteReference
+
+
+class PBRoot(pb.Root):
+    def __init__(self):
+        self.signals_handlers = []
+
+    def remote_init_bridge(self, signals_handler):
+        self.signals_handlers.append(HandlerWrapper(signals_handler))
+        log.info("registered signal handler")
+
+    def send_signal_eb(self, failure_, signal_name):
+        if not failure_.check(pb.PBConnectionLost):
+            log.error(
+                f"Error while sending signal {signal_name}: {failure_}",
+            )
+
+    def send_signal(self, name, args, kwargs):
+        to_remove = []
+        for wrapper in self.signals_handlers:
+            handler = wrapper.handler
+            try:
+                d = handler.callRemote(name, *args, **kwargs)
+            except pb.DeadReferenceError:
+                to_remove.append(wrapper)
+            else:
+                d.addErrback(self.send_signal_eb, name)
+        if to_remove:
+            for wrapper in to_remove:
+                log.debug("Removing signal handler for dead frontend")
+                self.signals_handlers.remove(wrapper)
+
+    def _bridge_deactivate_signals(self):
+        if hasattr(self, "signals_paused"):
+            log.warning("bridge signals already deactivated")
+            if self.signals_handler:
+                self.signals_paused.extend(self.signals_handler)
+        else:
+            self.signals_paused = self.signals_handlers
+        self.signals_handlers = []
+        log.debug("bridge signals have been deactivated")
+
+    def _bridge_reactivate_signals(self):
+        try:
+            self.signals_handlers = self.signals_paused
+        except AttributeError:
+            log.debug("signals were already activated")
+        else:
+            del self.signals_paused
+            log.debug("bridge signals have been reactivated")
+
+##METHODS_PART##
+
+
+class bridge(object):
+    def __init__(self):
+        log.info("Init Perspective Broker...")
+        self.root = PBRoot()
+        conf = config.parse_main_conf()
+        get_conf = partial(config.get_conf, conf, "bridge_pb", "")
+        conn_type = get_conf("connection_type", "unix_socket")
+        if conn_type == "unix_socket":
+            local_dir = Path(config.config_get(conf, "", "local_dir")).resolve()
+            socket_path = local_dir / "bridge_pb"
+            log.info(f"using UNIX Socket at {socket_path}")
+            reactor.listenUNIX(
+                str(socket_path), pb.PBServerFactory(self.root), mode=0o600
+            )
+        elif conn_type == "socket":
+            port = int(get_conf("port", 8789))
+            log.info(f"using TCP Socket at port {port}")
+            reactor.listenTCP(port, pb.PBServerFactory(self.root))
+        else:
+            raise ValueError(f"Unknown pb connection type: {conn_type!r}")
+
+    def send_signal(self, name, *args, **kwargs):
+        self.root.send_signal(name, args, kwargs)
+
+    def remote_init_bridge(self, signals_handler):
+        self.signals_handlers.append(signals_handler)
+        log.info("registered signal handler")
+
+    def register_method(self, name, callback):
+        log.debug("registering PB bridge method [%s]" % name)
+        setattr(self.root, "remote_" + name, callback)
+        #  self.root.register_method(name, callback)
+
+    def add_method(
+            self, name, int_suffix, in_sign, out_sign, method, async_=False, doc={}
+    ):
+        """Dynamically add a method to PB bridge"""
+        # FIXME: doc parameter is kept only temporary, the time to remove it from calls
+        log.debug("Adding method {name} to PB bridge".format(name=name))
+        self.register_method(name, method)
+
+    def add_signal(self, name, int_suffix, signature, doc={}):
+        log.debug("Adding signal {name} to PB bridge".format(name=name))
+        setattr(
+            self, name, lambda *args, **kwargs: self.send_signal(name, *args, **kwargs)
+        )
+
+    def bridge_deactivate_signals(self):
+        """Stop sending signals to bridge
+
+        Mainly used for mobile frontends, when the frontend is paused
+        """
+        self.root._bridge_deactivate_signals()
+
+    def bridge_reactivate_signals(self):
+        """Send again signals to bridge
+
+        Should only be used after bridge_deactivate_signals has been called
+        """
+        self.root._bridge_reactivate_signals()
+
+    def _debug(self, action, params, profile):
+        self.send_signal("_debug", action, params, profile)
+
+    def action_new(self, action_data, id, security_limit, profile):
+        self.send_signal("action_new", action_data, id, security_limit, profile)
+
+    def connected(self, jid_s, profile):
+        self.send_signal("connected", jid_s, profile)
+
+    def contact_deleted(self, entity_jid, profile):
+        self.send_signal("contact_deleted", entity_jid, profile)
+
+    def contact_new(self, contact_jid, attributes, groups, profile):
+        self.send_signal("contact_new", contact_jid, attributes, groups, profile)
+
+    def disconnected(self, profile):
+        self.send_signal("disconnected", profile)
+
+    def entity_data_updated(self, jid, name, value, profile):
+        self.send_signal("entity_data_updated", jid, name, value, profile)
+
+    def message_encryption_started(self, to_jid, encryption_data, profile_key):
+        self.send_signal("message_encryption_started", to_jid, encryption_data, profile_key)
+
+    def message_encryption_stopped(self, to_jid, encryption_data, profile_key):
+        self.send_signal("message_encryption_stopped", to_jid, encryption_data, profile_key)
+
+    def message_new(self, uid, timestamp, from_jid, to_jid, message, subject, mess_type, extra, profile):
+        self.send_signal("message_new", uid, timestamp, from_jid, to_jid, message, subject, mess_type, extra, profile)
+
+    def param_update(self, name, value, category, profile):
+        self.send_signal("param_update", name, value, category, profile)
+
+    def presence_update(self, entity_jid, show, priority, statuses, profile):
+        self.send_signal("presence_update", entity_jid, show, priority, statuses, profile)
+
+    def progress_error(self, id, error, profile):
+        self.send_signal("progress_error", id, error, profile)
+
+    def progress_finished(self, id, metadata, profile):
+        self.send_signal("progress_finished", id, metadata, profile)
+
+    def progress_started(self, id, metadata, profile):
+        self.send_signal("progress_started", id, metadata, profile)
+
+    def subscribe(self, sub_type, entity_jid, profile):
+        self.send_signal("subscribe", sub_type, entity_jid, profile)