--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libervia/backend/plugins/plugin_xep_0166/models.py	Fri Jun 02 11:49:51 2023 +0200
@@ -0,0 +1,187 @@
+#!/usr/bin/env python3
+
+# Libervia plugin for Jingle (XEP-0166)
+# 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 abc
+from dataclasses import dataclass
+from typing import Awaitable, Callable, Union
+
+from twisted.internet import defer
+from twisted.words.xish import domish
+
+from libervia.backend.core.core_types import SatXMPPEntity
+from libervia.backend.core.i18n import _
+
+
+class BaseApplicationHandler(abc.ABC):
+
+    @abc.abstractmethod
+    def jingle_request_confirmation(
+        self,
+        client: SatXMPPEntity,
+        action: str,
+        session: dict,
+        content_name: str,
+        desc_elt: domish.Element,
+    ) -> Union[
+        Callable[..., Union[bool, defer.Deferred]],
+        Callable[..., Awaitable[bool]]
+    ]:
+        """
+        If present, it is called on when session must be accepted.
+        If not present, a generic accept dialog will be used.
+
+        @param session: Jingle Session
+        @param desc_elt: <description> element
+        @return: True if the session is accepted.
+            A Deferred can be returned.
+        """
+        pass
+
+    @abc.abstractmethod
+    def jingle_session_init(
+        self,
+        client: SatXMPPEntity,
+        session: dict,
+        content_name: str,
+        *args, **kwargs
+    ) -> Union[
+        Callable[..., domish.Element],
+        Callable[..., Awaitable[domish.Element]]
+    ]:
+        """
+        Must return the domish.Element used for initial content.
+
+        @param client: SatXMPPEntity instance
+        @param session: Jingle Session
+        @param content_name: Name of the content
+        @return: The domish.Element used for initial content
+        """
+        pass
+
+    @abc.abstractmethod
+    def jingle_handler(
+        self,
+        client: SatXMPPEntity,
+        action: str,
+        session: dict,
+        content_name: str,
+        transport_elt: domish.Element
+    ) -> Union[
+        Callable[..., None],
+        Callable[..., Awaitable[None]]
+    ]:
+        """
+        Called on several actions to negotiate the application or transport.
+
+        @param client: SatXMPPEntity instance
+        @param action: Jingle action
+        @param session: Jingle Session
+        @param content_name: Name of the content
+        @param transport_elt: Transport element
+        """
+        pass
+
+    @abc.abstractmethod
+    def jingle_terminate(
+        self,
+        client: SatXMPPEntity,
+        action: str,
+        session: dict,
+        content_name: str,
+        reason_elt: domish.Element
+    ) -> Union[
+        Callable[..., None],
+        Callable[..., Awaitable[None]]
+    ]:
+        """
+        Called on session terminate, with reason_elt.
+        May be used to clean session.
+
+        @param reason_elt: Reason element
+        """
+        pass
+
+
+class BaseTransportHandler(abc.ABC):
+
+    @abc.abstractmethod
+    def jingle_session_init(
+        self,
+        client: SatXMPPEntity,
+        session: dict,
+        content_name: str,
+        *args, **kwargs
+    ) -> Union[
+        Callable[..., domish.Element],
+        Callable[..., Awaitable[domish.Element]]
+    ]:
+        """
+        Must return the domish.Element used for initial content.
+
+        @param client: SatXMPPEntity instance
+        @param session: Jingle Session
+        @param content_name: Name of the content
+        @return: The domish.Element used for initial content
+        """
+        pass
+
+    @abc.abstractmethod
+    def jingle_handler(
+        self,
+        client: SatXMPPEntity,
+        action: str,
+        session: dict,
+        content_name: str,
+        reason_elt: domish.Element
+    ) -> Union[
+        Callable[..., None],
+        Callable[..., Awaitable[None]]
+    ]:
+        """
+        Called on several actions to negotiate the application or transport.
+
+        @param client: SatXMPPEntity instance
+        @param action: Jingle action
+        @param session: Jingle Session
+        @param content_name: Name of the content
+        @param reason_elt: <reason> element
+        """
+        pass
+
+
+@dataclass(frozen=True)
+class ApplicationData:
+    namespace: str
+    handler: BaseApplicationHandler
+
+
+@dataclass(frozen=True)
+class TransportData:
+    namespace: str
+    handler: BaseTransportHandler
+    priority: int
+
+
+@dataclass(frozen=True)
+class ContentData:
+    application: ApplicationData
+    app_args: list
+    app_kwargs: dict
+    transport_data: dict
+    content_name: str