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Update EventContext get_current_event_ids and get_prev_event_ids to accept state filters and update calls where possible (#12791)

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Shay 2022-05-20 01:54:12 -07:00 committed by GitHub
parent 2be5a2b07b
commit 71e8afe34d
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10 changed files with 65 additions and 18 deletions
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1
changelog.d/12791.misc Normal file
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@ -0,0 +1 @@
Update EventContext `get_current_event_ids` and `get_prev_event_ids` to accept state filters and update calls where possible.

19
synapse/events/snapshot.py
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@ -24,6 +24,7 @@ from synapse.types import JsonDict, StateMap
if TYPE_CHECKING:
from synapse.storage import Storage
from synapse.storage.databases.main import DataStore
from synapse.storage.state import StateFilter
@attr.s(slots=True, auto_attribs=True)
@ -196,7 +197,9 @@ class EventContext:
return self._state_group
async def get_current_state_ids(self) -> Optional[StateMap[str]]:
async def get_current_state_ids(
self, state_filter: Optional["StateFilter"] = None
) -> Optional[StateMap[str]]:
"""
Gets the room state map, including this event - ie, the state in ``state_group``
@ -204,6 +207,9 @@ class EventContext:
not make it into the room state. This method will raise an exception if
``rejected`` is set.
Arg:
state_filter: specifies the type of state event to fetch from DB, example: EventTypes.JoinRules
Returns:
Returns None if state_group is None, which happens when the associated
event is an outlier.
@ -216,7 +222,7 @@ class EventContext:
assert self._state_delta_due_to_event is not None
prev_state_ids = await self.get_prev_state_ids()
prev_state_ids = await self.get_prev_state_ids(state_filter)
if self._state_delta_due_to_event:
prev_state_ids = dict(prev_state_ids)
@ -224,12 +230,17 @@ class EventContext:
return prev_state_ids
async def get_prev_state_ids(self) -> StateMap[str]:
async def get_prev_state_ids(
self, state_filter: Optional["StateFilter"] = None
) -> StateMap[str]:
"""
Gets the room state map, excluding this event.
For a non-state event, this will be the same as get_current_state_ids().
Args:
state_filter: specifies the type of state event to fetch from DB, example: EventTypes.JoinRules
Returns:
Returns {} if state_group is None, which happens when the associated
event is an outlier.
@ -239,7 +250,7 @@ class EventContext:
"""
assert self.state_group_before_event is not None
return await self._storage.state.get_state_ids_for_group(
self.state_group_before_event
self.state_group_before_event, state_filter
)

9
synapse/handlers/federation.py
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@ -54,6 +54,7 @@ from synapse.replication.http.federation import (
ReplicationStoreRoomOnOutlierMembershipRestServlet,
)
from synapse.storage.databases.main.events_worker import EventRedactBehaviour
from synapse.storage.state import StateFilter
from synapse.types import JsonDict, StateMap, get_domain_from_id
from synapse.util.async_helpers import Linearizer
from synapse.util.retryutils import NotRetryingDestination
@ -1259,7 +1260,9 @@ class FederationHandler:
event.content["third_party_invite"]["signed"]["token"],
)
original_invite = None
prev_state_ids = await context.get_prev_state_ids()
prev_state_ids = await context.get_prev_state_ids(
StateFilter.from_types([(EventTypes.ThirdPartyInvite, None)])
)
original_invite_id = prev_state_ids.get(key)
if original_invite_id:
original_invite = await self.store.get_event(
@ -1308,7 +1311,9 @@ class FederationHandler:
signed = event.content["third_party_invite"]["signed"]
token = signed["token"]
prev_state_ids = await context.get_prev_state_ids()
prev_state_ids = await context.get_prev_state_ids(
StateFilter.from_types([(EventTypes.ThirdPartyInvite, None)])
)
invite_event_id = prev_state_ids.get((EventTypes.ThirdPartyInvite, token))
invite_event = None

8
synapse/handlers/federation_event.py
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@ -30,6 +30,7 @@ from typing import (
from prometheus_client import Counter
from synapse import event_auth
from synapse.api.constants import (
EventContentFields,
EventTypes,
@ -63,6 +64,7 @@ from synapse.replication.http.federation import (
)
from synapse.state import StateResolutionStore
from synapse.storage.databases.main.events_worker import EventRedactBehaviour
from synapse.storage.state import StateFilter
from synapse.types import (
PersistedEventPosition,
RoomStreamToken,
@ -1500,7 +1502,11 @@ class FederationEventHandler:
return context
# now check auth against what we think the auth events *should* be.
prev_state_ids = await context.get_prev_state_ids()
event_types = event_auth.auth_types_for_event(event.room_version, event)
prev_state_ids = await context.get_prev_state_ids(
StateFilter.from_types(event_types)
)
auth_events_ids = self._event_auth_handler.compute_auth_events(
event, prev_state_ids, for_verification=True
)

14
synapse/handlers/message.py
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@ -634,7 +634,9 @@ class EventCreationHandler:
# federation as well as those created locally. As of room v3, aliases events
# can be created by users that are not in the room, therefore we have to
# tolerate them in event_auth.check().
prev_state_ids = await context.get_prev_state_ids()
prev_state_ids = await context.get_prev_state_ids(
StateFilter.from_types([(EventTypes.Member, None)])
)
prev_event_id = prev_state_ids.get((EventTypes.Member, event.sender))
prev_event = (
await self.store.get_event(prev_event_id, allow_none=True)
@ -761,7 +763,9 @@ class EventCreationHandler:
# This can happen due to out of band memberships
return None
prev_state_ids = await context.get_prev_state_ids()
prev_state_ids = await context.get_prev_state_ids(
StateFilter.from_types([(event.type, None)])
)
prev_event_id = prev_state_ids.get((event.type, event.state_key))
if not prev_event_id:
return None
@ -1547,7 +1551,11 @@ class EventCreationHandler:
"Redacting MSC2716 events is not supported in this room version",
)
prev_state_ids = await context.get_prev_state_ids()
event_types = event_auth.auth_types_for_event(event.room_version, event)
prev_state_ids = await context.get_prev_state_ids(
StateFilter.from_types(event_types)
)
auth_events_ids = self._event_auth_handler.compute_auth_events(
event, prev_state_ids, for_verification=True
)

5
synapse/handlers/room.py
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@ -303,7 +303,10 @@ class RoomCreationHandler:
context=tombstone_context,
)
old_room_state = await tombstone_context.get_current_state_ids()
state_filter = StateFilter.from_types(
[(EventTypes.CanonicalAlias, ""), (EventTypes.PowerLevels, "")]
)
old_room_state = await tombstone_context.get_current_state_ids(state_filter)
# We know the tombstone event isn't an outlier so it has current state.
assert old_room_state is not None

9
synapse/handlers/room_member.py
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@ -38,6 +38,7 @@ from synapse.event_auth import get_named_level, get_power_level_event
from synapse.events import EventBase
from synapse.events.snapshot import EventContext
from synapse.handlers.profile import MAX_AVATAR_URL_LEN, MAX_DISPLAYNAME_LEN
from synapse.storage.state import StateFilter
from synapse.types import (
JsonDict,
Requester,
@ -362,7 +363,9 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
historical=historical,
)
prev_state_ids = await context.get_prev_state_ids()
prev_state_ids = await context.get_prev_state_ids(
StateFilter.from_types([(EventTypes.Member, None)])
)
prev_member_event_id = prev_state_ids.get((EventTypes.Member, user_id), None)
@ -1160,7 +1163,9 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
else:
requester = types.create_requester(target_user)
prev_state_ids = await context.get_prev_state_ids()
prev_state_ids = await context.get_prev_state_ids(
StateFilter.from_types([(EventTypes.GuestAccess, None)])
)
if event.membership == Membership.JOIN:
if requester.is_guest:
guest_can_join = await self._can_guest_join(prev_state_ids)

9
synapse/push/bulk_push_rule_evaluator.py
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@ -20,7 +20,7 @@ import attr
from prometheus_client import Counter
from synapse.api.constants import EventTypes, Membership, RelationTypes
from synapse.event_auth import get_user_power_level
from synapse.event_auth import auth_types_for_event, get_user_power_level
from synapse.events import EventBase, relation_from_event
from synapse.events.snapshot import EventContext
from synapse.state import POWER_KEY
@ -31,6 +31,7 @@ from synapse.util.caches.descriptors import lru_cache
from synapse.util.caches.lrucache import LruCache
from synapse.util.metrics import measure_func
from ..storage.state import StateFilter
from .push_rule_evaluator import PushRuleEvaluatorForEvent
if TYPE_CHECKING:
@ -168,8 +169,12 @@ class BulkPushRuleEvaluator:
async def _get_power_levels_and_sender_level(
self, event: EventBase, context: EventContext
) -> Tuple[dict, int]:
prev_state_ids = await context.get_prev_state_ids()
event_types = auth_types_for_event(event.room_version, event)
prev_state_ids = await context.get_prev_state_ids(
StateFilter.from_types(event_types)
)
pl_event_id = prev_state_ids.get(POWER_KEY)
if pl_event_id:
# fastpath: if there's a power level event, that's all we need, and
# not having a power level event is an extreme edge case

7
synapse/storage/state.py
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@ -634,16 +634,19 @@ class StateGroupStorage:
return group_to_state
async def get_state_ids_for_group(self, state_group: int) -> StateMap[str]:
async def get_state_ids_for_group(
self, state_group: int, state_filter: Optional[StateFilter] = None
) -> StateMap[str]:
"""Get the event IDs of all the state in the given state group
Args:
state_group: A state group for which we want to get the state IDs.
state_filter: specifies the type of state event to fetch from DB, example: EventTypes.JoinRules
Returns:
Resolves to a map of (type, state_key) -> event_id
"""
group_to_state = await self.get_state_for_groups((state_group,))
group_to_state = await self.get_state_for_groups((state_group,), state_filter)
return group_to_state[state_group]

2
tests/test_state.py
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@ -88,7 +88,7 @@ class _DummyStore:
return groups
async def get_state_ids_for_group(self, state_group):
async def get_state_ids_for_group(self, state_group, state_filter=None):
return self._group_to_state[state_group]
async def store_state_group(