diff --git a/synapse/app/_base.py b/synapse/app/_base.py
index 50a02f51f5..39e28aff9f 100644
--- a/synapse/app/_base.py
+++ b/synapse/app/_base.py
@@ -37,6 +37,7 @@ from synapse.app import check_bind_error
from synapse.app.phone_stats_home import start_phone_stats_home
from synapse.config.homeserver import HomeServerConfig
from synapse.crypto import context_factory
+from synapse.events.presence_router import load_legacy_presence_router
from synapse.events.spamcheck import load_legacy_spam_checkers
from synapse.events.third_party_rules import load_legacy_third_party_event_rules
from synapse.logging.context import PreserveLoggingContext
@@ -370,6 +371,7 @@ async def start(hs: "HomeServer"):
load_legacy_spam_checkers(hs)
load_legacy_third_party_event_rules(hs)
+ load_legacy_presence_router(hs)
# If we've configured an expiry time for caches, start the background job now.
setup_expire_lru_cache_entries(hs)
diff --git a/synapse/config/server.py b/synapse/config/server.py
index 187b4301a0..871422ea28 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -248,6 +248,7 @@ class ServerConfig(Config):
self.use_presence = config.get("use_presence", True)
# Custom presence router module
+ # This is the legacy way of configuring it (the config should now be put in the modules section)
self.presence_router_module_class = None
self.presence_router_config = None
presence_router_config = presence_config.get("presence_router")
@@ -858,20 +859,6 @@ class ServerConfig(Config):
#
#enabled: false
- # Presence routers are third-party modules that can specify additional logic
- # to where presence updates from users are routed.
- #
- presence_router:
- # The custom module's class. Uncomment to use a custom presence router module.
- #
- #module: "my_custom_router.PresenceRouter"
-
- # Configuration options of the custom module. Refer to your module's
- # documentation for available options.
- #
- #config:
- # example_option: 'something'
-
# Whether to require authentication to retrieve profile data (avatars,
# display names) of other users through the client API. Defaults to
# 'false'. Note that profile data is also available via the federation
diff --git a/synapse/events/presence_router.py b/synapse/events/presence_router.py
index 6c37c8a7a4..eb4556cdc1 100644
--- a/synapse/events/presence_router.py
+++ b/synapse/events/presence_router.py
@@ -11,45 +11,115 @@
# 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
+import logging
+from typing import (
+ TYPE_CHECKING,
+ 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]]]
+]
+GET_INTERESTED_USERS_CALLBACK = Callable[
+ [str], Awaitable[Union[Set[str], "PresenceRouter.ALL_USERS"]]
+]
+
+logger = logging.getLogger(__name__)
+
+
+def load_legacy_presence_router(hs: "HomeServer"):
+ """Wrapper that loads a presence router module configured using the old
+ configuration, and registers the hooks they implement.
+ """
+
+ if hs.config.presence_router_module_class is None:
+ return
+
+ module = hs.config.presence_router_module_class
+ config = hs.config.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, **kwargs):
+ # mypy doesn't do well across function boundaries so we need to tell it
+ # f is definitely not None.
+ 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. If a custom presence router is configured, calls will be
- passed to that instead.
+ additional destinations.
"""
ALL_USERS = "ALL"
def __init__(self, hs: "HomeServer"):
- self.custom_presence_router = None
+ # 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] = []
- # 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()
+ 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,
+ ):
+ # 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]"
)
- # 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),
- )
- )
+ # 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,
@@ -66,14 +136,40 @@ class PresenceRouter:
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 {}
+ # 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 = {}
+ # 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], ALL_USERS]:
"""
@@ -92,12 +188,36 @@ class PresenceRouter:
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()
+ # 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
diff --git a/synapse/module_api/__init__.py b/synapse/module_api/__init__.py
index 82725853bc..84bb7264a4 100644
--- a/synapse/module_api/__init__.py
+++ b/synapse/module_api/__init__.py
@@ -32,6 +32,7 @@ from twisted.internet import defer
from twisted.web.resource import IResource
from synapse.events import EventBase
+from synapse.events.presence_router import PresenceRouter
from synapse.http.client import SimpleHttpClient
from synapse.http.server import (
DirectServeHtmlResource,
@@ -57,6 +58,8 @@ This package defines the 'stable' API which can be used by extension modules whi
are loaded into Synapse.
"""
+PRESENCE_ALL_USERS = PresenceRouter.ALL_USERS
+
__all__ = [
"errors",
"make_deferred_yieldable",
@@ -70,6 +73,7 @@ __all__ = [
"DirectServeHtmlResource",
"DirectServeJsonResource",
"ModuleApi",
+ "PRESENCE_ALL_USERS",
]
logger = logging.getLogger(__name__)
@@ -111,6 +115,7 @@ class ModuleApi:
self._spam_checker = hs.get_spam_checker()
self._account_validity_handler = hs.get_account_validity_handler()
self._third_party_event_rules = hs.get_third_party_event_rules()
+ self._presence_router = hs.get_presence_router()
#################################################################################
# The following methods should only be called during the module's initialisation.
@@ -130,6 +135,11 @@ class ModuleApi:
"""Registers callbacks for third party event rules capabilities."""
return self._third_party_event_rules.register_third_party_rules_callbacks
+ @property
+ def register_presence_router_callbacks(self):
+ """Registers callbacks for presence router capabilities."""
+ return self._presence_router.register_presence_router_callbacks
+
def register_web_resource(self, path: str, resource: IResource):
"""Registers a web resource to be served at the given path.
|
