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Allow modules to create and send events into rooms (#8479)

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This PR allows Synapse modules making use of the `ModuleApi` to create and send non-membership events into a room. This can useful to have modules send messages, or change power levels in a room etc. Note that they must send event through a user that's already in the room.

The non-membership event limitation is currently arbitrary, as it's another chunk of work and not necessary at the moment.
This commit is contained in:
Andrew Morgan 2020-10-09 13:46:36 +01:00 committed by GitHub
parent 5009ffcaa4
commit 66ac4b1e34
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5 changed files with 157 additions and 8 deletions
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1
changelog.d/8479.feature Normal file
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@ -0,0 +1 @@
Add the ability to send non-membership events into a room via the `ModuleApi`.

11
synapse/handlers/message.py
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@ -59,6 +59,7 @@ from synapse.visibility import filter_events_for_client
from ._base import BaseHandler
if TYPE_CHECKING:
from synapse.events.third_party_rules import ThirdPartyEventRules
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
@ -393,7 +394,9 @@ class EventCreationHandler:
self.action_generator = hs.get_action_generator()
self.spam_checker = hs.get_spam_checker()
self.third_party_event_rules = hs.get_third_party_event_rules()
self.third_party_event_rules = (
self.hs.get_third_party_event_rules()
) # type: ThirdPartyEventRules
self._block_events_without_consent_error = (
self.config.block_events_without_consent_error
@ -1229,11 +1232,7 @@ class EventCreationHandler:
# Since this is a dummy-event it is OK if it is sent by a
# shadow-banned user.
await self.handle_new_client_event(
requester=requester,
event=event,
context=context,
ratelimit=False,
ignore_shadow_ban=True,
requester, event, context, ratelimit=False, ignore_shadow_ban=True,
)
return True
except ConsentNotGivenError:

30
synapse/module_api/__init__.py
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@ -18,11 +18,12 @@ from typing import TYPE_CHECKING, Iterable, Optional, Tuple
from twisted.internet import defer
from synapse.events import EventBase
from synapse.http.client import SimpleHttpClient
from synapse.http.site import SynapseRequest
from synapse.logging.context import make_deferred_yieldable, run_in_background
from synapse.storage.state import StateFilter
from synapse.types import UserID
from synapse.types import JsonDict, UserID, create_requester
if TYPE_CHECKING:
from synapse.server import HomeServer
@ -320,6 +321,33 @@ class ModuleApi:
state = yield defer.ensureDeferred(self._store.get_events(state_ids.values()))
return state.values()
async def create_and_send_event_into_room(self, event_dict: JsonDict) -> EventBase:
"""Create and send an event into a room. Membership events are currently not supported.
Args:
event_dict: A dictionary representing the event to send.
Required keys are `type`, `room_id`, `sender` and `content`.
Returns:
The event that was sent. If state event deduplication happened, then
the previous, duplicate event instead.
Raises:
SynapseError if the event was not allowed.
"""
# Create a requester object
requester = create_requester(event_dict["sender"])
# Create and send the event
(
event,
_,
) = await self._hs.get_event_creation_handler().create_and_send_nonmember_event(
requester, event_dict, ratelimit=False, ignore_shadow_ban=True,
)
return event
class PublicRoomListManager:
"""Contains methods for adding to, removing from and querying whether a room

95
tests/module_api/test_api.py
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@ -12,9 +12,12 @@
# 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 mock import Mock
from synapse.events import EventBase
from synapse.rest import admin
from synapse.rest.client.v1 import login, room
from synapse.types import create_requester
from tests.unittest import HomeserverTestCase
@ -29,6 +32,7 @@ class ModuleApiTestCase(HomeserverTestCase):
def prepare(self, reactor, clock, homeserver):
self.store = homeserver.get_datastore()
self.module_api = homeserver.get_module_api()
self.event_creation_handler = homeserver.get_event_creation_handler()
def test_can_register_user(self):
"""Tests that an external module can register a user"""
@ -60,6 +64,97 @@ class ModuleApiTestCase(HomeserverTestCase):
displayname = self.get_success(self.store.get_profile_displayname("bob"))
self.assertEqual(displayname, "Bobberino")
def test_sending_events_into_room(self):
"""Tests that a module can send events into a room"""
# Mock out create_and_send_nonmember_event to check whether events are being sent
self.event_creation_handler.create_and_send_nonmember_event = Mock(
spec=[],
side_effect=self.event_creation_handler.create_and_send_nonmember_event,
)
# Create a user and room to play with
user_id = self.register_user("summer", "monkey")
tok = self.login("summer", "monkey")
room_id = self.helper.create_room_as(user_id, tok=tok)
# Create and send a non-state event
content = {"body": "I am a puppet", "msgtype": "m.text"}
event_dict = {
"room_id": room_id,
"type": "m.room.message",
"content": content,
"sender": user_id,
}
event = self.get_success(
self.module_api.create_and_send_event_into_room(event_dict)
) # type: EventBase
self.assertEqual(event.sender, user_id)
self.assertEqual(event.type, "m.room.message")
self.assertEqual(event.room_id, room_id)
self.assertFalse(hasattr(event, "state_key"))
self.assertDictEqual(event.content, content)
# Check that the event was sent
self.event_creation_handler.create_and_send_nonmember_event.assert_called_with(
create_requester(user_id),
event_dict,
ratelimit=False,
ignore_shadow_ban=True,
)
# Create and send a state event
content = {
"events_default": 0,
"users": {user_id: 100},
"state_default": 50,
"users_default": 0,
"events": {"test.event.type": 25},
}
event_dict = {
"room_id": room_id,
"type": "m.room.power_levels",
"content": content,
"sender": user_id,
"state_key": "",
}
event = self.get_success(
self.module_api.create_and_send_event_into_room(event_dict)
) # type: EventBase
self.assertEqual(event.sender, user_id)
self.assertEqual(event.type, "m.room.power_levels")
self.assertEqual(event.room_id, room_id)
self.assertEqual(event.state_key, "")
self.assertDictEqual(event.content, content)
# Check that the event was sent
self.event_creation_handler.create_and_send_nonmember_event.assert_called_with(
create_requester(user_id),
{
"type": "m.room.power_levels",
"content": content,
"room_id": room_id,
"sender": user_id,
"state_key": "",
},
ratelimit=False,
ignore_shadow_ban=True,
)
# Check that we can't send membership events
content = {
"membership": "leave",
}
event_dict = {
"room_id": room_id,
"type": "m.room.member",
"content": content,
"sender": user_id,
"state_key": user_id,
}
self.get_failure(
self.module_api.create_and_send_event_into_room(event_dict), Exception
)
def test_public_rooms(self):
"""Tests that a room can be added and removed from the public rooms list,
as well as have its public rooms directory state queried.

28
tests/rest/client/test_third_party_rules.py
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@ -13,10 +13,12 @@
# See the License for the specific language governing permissions and
# limitations under the License.
import threading
from typing import Dict
from mock import Mock
from synapse.events import EventBase
from synapse.module_api import ModuleApi
from synapse.rest import admin
from synapse.rest.client.v1 import login, room
from synapse.types import Requester, StateMap
@ -27,10 +29,11 @@ thread_local = threading.local()
class ThirdPartyRulesTestModule:
def __init__(self, config, module_api):
def __init__(self, config: Dict, module_api: ModuleApi):
# keep a record of the "current" rules module, so that the test can patch
# it if desired.
thread_local.rules_module = self
self.module_api = module_api
async def on_create_room(
self, requester: Requester, config: dict, is_requester_admin: bool
@ -142,3 +145,26 @@ class ThirdPartyRulesTestCase(unittest.HomeserverTestCase):
self.assertEqual(channel.result["code"], b"200", channel.result)
ev = channel.json_body
self.assertEqual(ev["content"]["x"], "y")
def test_send_event(self):
"""Tests that the module can send an event into a room via the module api"""
content = {
"msgtype": "m.text",
"body": "Hello!",
}
event_dict = {
"room_id": self.room_id,
"type": "m.room.message",
"content": content,
"sender": self.user_id,
}
event = self.get_success(
current_rules_module().module_api.create_and_send_event_into_room(
event_dict
)
) # type: EventBase
self.assertEquals(event.sender, self.user_id)
self.assertEquals(event.room_id, self.room_id)
self.assertEquals(event.type, "m.room.message")
self.assertEquals(event.content, content)