104 lines
3.9 KiB
Python
104 lines
3.9 KiB
Python
# Copyright 2021 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from typing import TYPE_CHECKING, Dict, Iterable, Set, Union
|
|
|
|
from synapse.api.presence import UserPresenceState
|
|
|
|
if TYPE_CHECKING:
|
|
from synapse.server import HomeServer
|
|
|
|
|
|
class PresenceRouter:
|
|
"""
|
|
A module that the homeserver will call upon to help route user presence updates to
|
|
additional destinations. If a custom presence router is configured, calls will be
|
|
passed to that instead.
|
|
"""
|
|
|
|
ALL_USERS = "ALL"
|
|
|
|
def __init__(self, hs: "HomeServer"):
|
|
self.custom_presence_router = None
|
|
|
|
# Check whether a custom presence router module has been configured
|
|
if hs.config.presence_router_module_class:
|
|
# Initialise the module
|
|
self.custom_presence_router = hs.config.presence_router_module_class(
|
|
config=hs.config.presence_router_config, module_api=hs.get_module_api()
|
|
)
|
|
|
|
# Ensure the module has implemented the required methods
|
|
required_methods = ["get_users_for_states", "get_interested_users"]
|
|
for method_name in required_methods:
|
|
if not hasattr(self.custom_presence_router, method_name):
|
|
raise Exception(
|
|
"PresenceRouter module '%s' must implement all required methods: %s"
|
|
% (
|
|
hs.config.presence_router_module_class.__name__,
|
|
", ".join(required_methods),
|
|
)
|
|
)
|
|
|
|
async def get_users_for_states(
|
|
self,
|
|
state_updates: Iterable[UserPresenceState],
|
|
) -> Dict[str, Set[UserPresenceState]]:
|
|
"""
|
|
Given an iterable of user presence updates, determine where each one
|
|
needs to go.
|
|
|
|
Args:
|
|
state_updates: An iterable of user presence state updates.
|
|
|
|
Returns:
|
|
A dictionary of user_id -> set of UserPresenceState, indicating which
|
|
presence updates each user should receive.
|
|
"""
|
|
if self.custom_presence_router is not None:
|
|
# Ask the custom module
|
|
return await self.custom_presence_router.get_users_for_states(
|
|
state_updates=state_updates
|
|
)
|
|
|
|
# Don't include any extra destinations for presence updates
|
|
return {}
|
|
|
|
async def get_interested_users(self, user_id: str) -> Union[Set[str], ALL_USERS]:
|
|
"""
|
|
Retrieve a list of users that `user_id` is interested in receiving the
|
|
presence of. This will be in addition to those they share a room with.
|
|
Optionally, the object PresenceRouter.ALL_USERS can be returned to indicate
|
|
that this user should receive all incoming local and remote presence updates.
|
|
|
|
Note that this method will only be called for local users, but can return users
|
|
that are local or remote.
|
|
|
|
Args:
|
|
user_id: A user requesting presence updates.
|
|
|
|
Returns:
|
|
A set of user IDs to return presence updates for, or ALL_USERS to return all
|
|
known updates.
|
|
"""
|
|
if self.custom_presence_router is not None:
|
|
# Ask the custom module for interested users
|
|
return await self.custom_presence_router.get_interested_users(
|
|
user_id=user_id
|
|
)
|
|
|
|
# A custom presence router is not defined.
|
|
# Don't report any additional interested users
|
|
return set()
|