diff --git a/changelog.d/10524.feature b/changelog.d/10524.feature new file mode 100644 index 0000000000..288c9bd74e --- /dev/null +++ b/changelog.d/10524.feature @@ -0,0 +1 @@ +Port the PresenceRouter module interface to the new generic interface. \ No newline at end of file diff --git a/docs/modules.md b/docs/modules.md index 9a430390a4..ae8d6f5b73 100644 --- a/docs/modules.md +++ b/docs/modules.md @@ -282,6 +282,52 @@ the request is a server admin. Modules can modify the `request_content` (by e.g. adding events to its `initial_state`), or deny the room's creation by raising a `module_api.errors.SynapseError`. +#### Presence router callbacks + +Presence router callbacks allow module developers to specify additional users (local or remote) +to receive certain presence updates from local users. Presence router callbacks can be +registered using the module API's `register_presence_router_callbacks` method. + +The available presence router callbacks are: + +```python +async def get_users_for_states( + self, + state_updates: Iterable["synapse.api.UserPresenceState"], +) -> Dict[str, Set["synapse.api.UserPresenceState"]]: +``` +**Requires** `get_interested_users` to also be registered + +Called when processing updates to the presence state of one or more users. This callback can +be used to instruct the server to forward that presence state to specific users. The module +must return a dictionary that maps from Matrix user IDs (which can be local or remote) to the +`UserPresenceState` changes that they should be forwarded. + +Synapse will then attempt to send the specified presence updates to each user when possible. + +```python +async def get_interested_users( + self, + user_id: str +) -> Union[Set[str], "synapse.module_api.PRESENCE_ALL_USERS"] +``` +**Requires** `get_users_for_states` to also be registered + +Called when determining which users someone should be able to see the presence state of. This +callback should return complementary results to `get_users_for_state` or the presence information +may not be properly forwarded. + +The callback is given the Matrix user ID for a local user that is requesting presence data and +should return the Matrix user IDs of the users whose presence state they are allowed to +query. The returned users can be local or remote. + +Alternatively the callback can return `synapse.module_api.PRESENCE_ALL_USERS` +to indicate that the user should receive updates from all known users. + +For example, if the user `@alice:example.org` is passed to this method, and the Set +`{"@bob:example.com", "@charlie:somewhere.org"}` is returned, this signifies that Alice +should receive presence updates sent by Bob and Charlie, regardless of whether these users +share a room. ### Porting an existing module that uses the old interface diff --git a/docs/presence_router_module.md b/docs/presence_router_module.md index 4a3e720240..face54fe2b 100644 --- a/docs/presence_router_module.md +++ b/docs/presence_router_module.md @@ -1,3 +1,9 @@ +

+This page of the Synapse documentation is now deprecated. For up to date +documentation on setting up or writing a presence router module, please see +this page. +

+ # Presence Router Module Synapse supports configuring a module that can specify additional users diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml index aeebcaf45f..6030e85a08 100644 --- a/docs/sample_config.yaml +++ b/docs/sample_config.yaml @@ -108,20 +108,6 @@ presence: # #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/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. diff --git a/tests/events/test_presence_router.py b/tests/events/test_presence_router.py index 6b87f571b8..3b3866bff8 100644 --- a/tests/events/test_presence_router.py +++ b/tests/events/test_presence_router.py @@ -17,7 +17,7 @@ from unittest.mock import Mock import attr from synapse.api.constants import EduTypes -from synapse.events.presence_router import PresenceRouter +from synapse.events.presence_router import PresenceRouter, load_legacy_presence_router from synapse.federation.units import Transaction from synapse.handlers.presence import UserPresenceState from synapse.module_api import ModuleApi @@ -34,7 +34,7 @@ class PresenceRouterTestConfig: users_who_should_receive_all_presence = attr.ib(type=List[str], default=[]) -class PresenceRouterTestModule: +class LegacyPresenceRouterTestModule: def __init__(self, config: PresenceRouterTestConfig, module_api: ModuleApi): self._config = config self._module_api = module_api @@ -77,6 +77,53 @@ class PresenceRouterTestModule: return config +class PresenceRouterTestModule: + def __init__(self, config: PresenceRouterTestConfig, api: ModuleApi): + self._config = config + self._module_api = api + api.register_presence_router_callbacks( + get_users_for_states=self.get_users_for_states, + get_interested_users=self.get_interested_users, + ) + + async def get_users_for_states( + self, state_updates: Iterable[UserPresenceState] + ) -> Dict[str, Set[UserPresenceState]]: + users_to_state = { + user_id: set(state_updates) + for user_id in self._config.users_who_should_receive_all_presence + } + return users_to_state + + async def get_interested_users( + self, user_id: str + ) -> Union[Set[str], PresenceRouter.ALL_USERS]: + if user_id in self._config.users_who_should_receive_all_presence: + return PresenceRouter.ALL_USERS + + return set() + + @staticmethod + def parse_config(config_dict: dict) -> PresenceRouterTestConfig: + """Parse a configuration dictionary from the homeserver config, do + some validation and return a typed PresenceRouterConfig. + + Args: + config_dict: The configuration dictionary. + + Returns: + A validated config object. + """ + # Initialise a typed config object + config = PresenceRouterTestConfig() + + config.users_who_should_receive_all_presence = config_dict.get( + "users_who_should_receive_all_presence" + ) + + return config + + class PresenceRouterTestCase(FederatingHomeserverTestCase): servlets = [ admin.register_servlets, @@ -86,9 +133,17 @@ class PresenceRouterTestCase(FederatingHomeserverTestCase): ] def make_homeserver(self, reactor, clock): - return self.setup_test_homeserver( + hs = self.setup_test_homeserver( federation_transport_client=Mock(spec=["send_transaction"]), ) + # Load the modules into the homeserver + module_api = hs.get_module_api() + for module, config in hs.config.modules.loaded_modules: + module(config=config, api=module_api) + + load_legacy_presence_router(hs) + + return hs def prepare(self, reactor, clock, homeserver): self.sync_handler = self.hs.get_sync_handler() @@ -98,7 +153,7 @@ class PresenceRouterTestCase(FederatingHomeserverTestCase): { "presence": { "presence_router": { - "module": __name__ + ".PresenceRouterTestModule", + "module": __name__ + ".LegacyPresenceRouterTestModule", "config": { "users_who_should_receive_all_presence": [ "@presence_gobbler:test", @@ -109,7 +164,28 @@ class PresenceRouterTestCase(FederatingHomeserverTestCase): "send_federation": True, } ) + def test_receiving_all_presence_legacy(self): + self.receiving_all_presence_test_body() + + @override_config( + { + "modules": [ + { + "module": __name__ + ".PresenceRouterTestModule", + "config": { + "users_who_should_receive_all_presence": [ + "@presence_gobbler:test", + ] + }, + }, + ], + "send_federation": True, + } + ) def test_receiving_all_presence(self): + self.receiving_all_presence_test_body() + + def receiving_all_presence_test_body(self): """Test that a user that does not share a room with another other can receive presence for them, due to presence routing. """ @@ -203,7 +279,7 @@ class PresenceRouterTestCase(FederatingHomeserverTestCase): { "presence": { "presence_router": { - "module": __name__ + ".PresenceRouterTestModule", + "module": __name__ + ".LegacyPresenceRouterTestModule", "config": { "users_who_should_receive_all_presence": [ "@presence_gobbler1:test", @@ -216,7 +292,30 @@ class PresenceRouterTestCase(FederatingHomeserverTestCase): "send_federation": True, } ) + def test_send_local_online_presence_to_with_module_legacy(self): + self.send_local_online_presence_to_with_module_test_body() + + @override_config( + { + "modules": [ + { + "module": __name__ + ".PresenceRouterTestModule", + "config": { + "users_who_should_receive_all_presence": [ + "@presence_gobbler1:test", + "@presence_gobbler2:test", + "@far_away_person:island", + ] + }, + }, + ], + "send_federation": True, + } + ) def test_send_local_online_presence_to_with_module(self): + self.send_local_online_presence_to_with_module_test_body() + + def send_local_online_presence_to_with_module_test_body(self): """Tests that send_local_presence_to_users sends local online presence to a set of specified local and remote users, with a custom PresenceRouter module enabled. """