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Implement MSC3912: Relation-based redactions (#14260)

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Co-authored-by: Sean Quah <8349537+squahtx@users.noreply.github.com>
This commit is contained in:
Brendan Abolivier 2022-11-03 16:21:31 +00:00 • committed by GitHub
parent e5cd278f3f
commit 86c5a710d8
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10 changed files with 486 additions and 28 deletions
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57
synapse/rest/client/room.py
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@ -52,6 +52,7 @@ from synapse.http.servlet import (
from synapse.http.site import SynapseRequest
from synapse.logging.context import make_deferred_yieldable, run_in_background
from synapse.logging.opentracing import set_tag
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.rest.client._base import client_patterns
from synapse.rest.client.transactions import HttpTransactionCache
from synapse.storage.state import StateFilter
@ -1029,6 +1030,8 @@ class RoomRedactEventRestServlet(TransactionRestServlet):
super().__init__(hs)
self.event_creation_handler = hs.get_event_creation_handler()
self.auth = hs.get_auth()
self._relation_handler = hs.get_relations_handler()
self._msc3912_enabled = hs.config.experimental.msc3912_enabled
def register(self, http_server: HttpServer) -> None:
PATTERNS = "/rooms/(?P<room_id>[^/]*)/redact/(?P<event_id>[^/]*)"
@ -1045,20 +1048,46 @@ class RoomRedactEventRestServlet(TransactionRestServlet):
content = parse_json_object_from_request(request)
try:
(
event,
_,
) = await self.event_creation_handler.create_and_send_nonmember_event(
requester,
{
"type": EventTypes.Redaction,
"content": content,
"room_id": room_id,
"sender": requester.user.to_string(),
"redacts": event_id,
},
txn_id=txn_id,
)
with_relations = None
if self._msc3912_enabled and "org.matrix.msc3912.with_relations" in content:
with_relations = content["org.matrix.msc3912.with_relations"]
del content["org.matrix.msc3912.with_relations"]
# Check if there's an existing event for this transaction now (even though
# create_and_send_nonmember_event also does it) because, if there's one,
# then we want to skip the call to redact_events_related_to.
event = None
if txn_id:
event = await self.event_creation_handler.get_event_from_transaction(
requester, txn_id, room_id
)
if event is None:
(
event,
_,
) = await self.event_creation_handler.create_and_send_nonmember_event(
requester,
{
"type": EventTypes.Redaction,
"content": content,
"room_id": room_id,
"sender": requester.user.to_string(),
"redacts": event_id,
},
txn_id=txn_id,
)
if with_relations:
run_as_background_process(
"redact_related_events",
self._relation_handler.redact_events_related_to,
requester=requester,
event_id=event_id,
initial_redaction_event=event,
relation_types=with_relations,
)
event_id = event.event_id
except ShadowBanError:
event_id = "$" + random_string(43)