mirror of
https://git.anonymousland.org/anonymousland/synapse-product.git
synced 2024-12-14 20:54:19 -05:00
225 lines
8.2 KiB
Python
225 lines
8.2 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.
|
|
import logging
|
|
from typing import (
|
|
TYPE_CHECKING,
|
|
Any,
|
|
Awaitable,
|
|
Callable,
|
|
Dict,
|
|
Iterable,
|
|
List,
|
|
Optional,
|
|
Set,
|
|
Union,
|
|
)
|
|
|
|
from synapse.api.presence import UserPresenceState
|
|
from synapse.util.async_helpers import maybe_awaitable
|
|
|
|
if TYPE_CHECKING:
|
|
from synapse.server import HomeServer
|
|
|
|
GET_USERS_FOR_STATES_CALLBACK = Callable[
|
|
[Iterable[UserPresenceState]], Awaitable[Dict[str, Set[UserPresenceState]]]
|
|
]
|
|
# This must either return a set of strings or the constant PresenceRouter.ALL_USERS.
|
|
GET_INTERESTED_USERS_CALLBACK = Callable[[str], Awaitable[Union[Set[str], str]]]
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
def load_legacy_presence_router(hs: "HomeServer") -> None:
|
|
"""Wrapper that loads a presence router module configured using the old
|
|
configuration, and registers the hooks they implement.
|
|
"""
|
|
|
|
if hs.config.server.presence_router_module_class is None:
|
|
return
|
|
|
|
module = hs.config.server.presence_router_module_class
|
|
config = hs.config.server.presence_router_config
|
|
api = hs.get_module_api()
|
|
|
|
presence_router = module(config=config, module_api=api)
|
|
|
|
# The known hooks. If a module implements a method which name appears in this set,
|
|
# we'll want to register it.
|
|
presence_router_methods = {
|
|
"get_users_for_states",
|
|
"get_interested_users",
|
|
}
|
|
|
|
# All methods that the module provides should be async, but this wasn't enforced
|
|
# in the old module system, so we wrap them if needed
|
|
def async_wrapper(f: Optional[Callable]) -> Optional[Callable[..., Awaitable]]:
|
|
# f might be None if the callback isn't implemented by the module. In this
|
|
# case we don't want to register a callback at all so we return None.
|
|
if f is None:
|
|
return None
|
|
|
|
def run(*args: Any, **kwargs: Any) -> Awaitable:
|
|
# Assertion required because mypy can't prove we won't change `f`
|
|
# back to `None`. See
|
|
# https://mypy.readthedocs.io/en/latest/common_issues.html#narrowing-and-inner-functions
|
|
assert f is not None
|
|
|
|
return maybe_awaitable(f(*args, **kwargs))
|
|
|
|
return run
|
|
|
|
# Register the hooks through the module API.
|
|
hooks = {
|
|
hook: async_wrapper(getattr(presence_router, hook, None))
|
|
for hook in presence_router_methods
|
|
}
|
|
|
|
api.register_presence_router_callbacks(**hooks)
|
|
|
|
|
|
class PresenceRouter:
|
|
"""
|
|
A module that the homeserver will call upon to help route user presence updates to
|
|
additional destinations.
|
|
"""
|
|
|
|
ALL_USERS = "ALL"
|
|
|
|
def __init__(self, hs: "HomeServer"):
|
|
# Initially there are no callbacks
|
|
self._get_users_for_states_callbacks: List[GET_USERS_FOR_STATES_CALLBACK] = []
|
|
self._get_interested_users_callbacks: List[GET_INTERESTED_USERS_CALLBACK] = []
|
|
|
|
def register_presence_router_callbacks(
|
|
self,
|
|
get_users_for_states: Optional[GET_USERS_FOR_STATES_CALLBACK] = None,
|
|
get_interested_users: Optional[GET_INTERESTED_USERS_CALLBACK] = None,
|
|
) -> None:
|
|
# PresenceRouter modules are required to implement both of these methods
|
|
# or neither of them as they are assumed to act in a complementary manner
|
|
paired_methods = [get_users_for_states, get_interested_users]
|
|
if paired_methods.count(None) == 1:
|
|
raise RuntimeError(
|
|
"PresenceRouter modules must register neither or both of the paired callbacks: "
|
|
"[get_users_for_states, get_interested_users]"
|
|
)
|
|
|
|
# Append the methods provided to the lists of callbacks
|
|
if get_users_for_states is not None:
|
|
self._get_users_for_states_callbacks.append(get_users_for_states)
|
|
|
|
if get_interested_users is not None:
|
|
self._get_interested_users_callbacks.append(get_interested_users)
|
|
|
|
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.
|
|
"""
|
|
|
|
# Bail out early if we don't have any callbacks to run.
|
|
if len(self._get_users_for_states_callbacks) == 0:
|
|
# Don't include any extra destinations for presence updates
|
|
return {}
|
|
|
|
users_for_states: Dict[str, Set[UserPresenceState]] = {}
|
|
# run all the callbacks for get_users_for_states and combine the results
|
|
for callback in self._get_users_for_states_callbacks:
|
|
try:
|
|
result = await callback(state_updates)
|
|
except Exception as e:
|
|
logger.warning("Failed to run module API callback %s: %s", callback, e)
|
|
continue
|
|
|
|
if not isinstance(result, Dict):
|
|
logger.warning(
|
|
"Wrong type returned by module API callback %s: %s, expected Dict",
|
|
callback,
|
|
result,
|
|
)
|
|
continue
|
|
|
|
for key, new_entries in result.items():
|
|
if not isinstance(new_entries, Set):
|
|
logger.warning(
|
|
"Wrong type returned by module API callback %s: %s, expected Set",
|
|
callback,
|
|
new_entries,
|
|
)
|
|
break
|
|
users_for_states.setdefault(key, set()).update(new_entries)
|
|
|
|
return users_for_states
|
|
|
|
async def get_interested_users(self, user_id: str) -> Union[Set[str], str]:
|
|
"""
|
|
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.
|
|
"""
|
|
|
|
# Bail out early if we don't have any callbacks to run.
|
|
if len(self._get_interested_users_callbacks) == 0:
|
|
# Don't report any additional interested users
|
|
return set()
|
|
|
|
interested_users = set()
|
|
# run all the callbacks for get_interested_users and combine the results
|
|
for callback in self._get_interested_users_callbacks:
|
|
try:
|
|
result = await callback(user_id)
|
|
except Exception as e:
|
|
logger.warning("Failed to run module API callback %s: %s", callback, e)
|
|
continue
|
|
|
|
# If one of the callbacks returns ALL_USERS then we can stop calling all
|
|
# of the other callbacks, since the set of interested_users is already as
|
|
# large as it can possibly be
|
|
if result == PresenceRouter.ALL_USERS:
|
|
return PresenceRouter.ALL_USERS
|
|
|
|
if not isinstance(result, Set):
|
|
logger.warning(
|
|
"Wrong type returned by module API callback %s: %s, expected set",
|
|
callback,
|
|
result,
|
|
)
|
|
continue
|
|
|
|
# Add the new interested users to the set
|
|
interested_users.update(result)
|
|
|
|
return interested_users
|