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https://github.com/element-hq/synapse
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allow third party rules to rebuild a batched event
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parent
16fabc8b32
commit
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@ -1256,12 +1256,22 @@ class EventCreationHandler:
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raise SynapseError(
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403, "This event is not allowed in this context", Codes.FORBIDDEN
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)
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# the third-party rules want to replace the event. We'll need to build a new
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# event.
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elif new_content is not None:
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# the third-party rules want to replace the event. We'll need to build a new
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# event.
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event, context = await self._rebuild_event_after_third_party_rules(
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new_content, event
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)
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if for_batch:
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event, context = await self._rebuild_event_after_third_party_rules(
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new_content,
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event,
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for_batch=True,
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state_map=state_map,
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prev_event_ids=prev_event_ids,
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current_state_group=current_state_group,
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)
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else:
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event, context = await self._rebuild_event_after_third_party_rules(
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new_content, event
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)
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self.validator.validate_new(event, self.config)
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await self._validate_event_relation(event)
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@ -2047,10 +2057,27 @@ class EventCreationHandler:
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del self._rooms_to_exclude_from_dummy_event_insertion[room_id]
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async def _rebuild_event_after_third_party_rules(
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self, third_party_result: dict, original_event: EventBase
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self,
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third_party_result: dict,
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original_event: EventBase,
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for_batch: bool = False,
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state_map: Optional[StateMap[str]] = None,
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prev_event_ids: Optional[List[str]] = None,
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current_state_group: Optional[int] = None,
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) -> Tuple[EventBase, EventContext]:
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# the third_party_event_rules want to replace the event.
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# we do some basic checks, and then return the replacement event and context.
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"""
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The third_party_event_rules want to replace the event.
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we do some basic checks, and then return the replacement event and context.
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If for_batch is true, state_map, prev_event_ids, and current_state_group must be
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provided.
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third_party_result: An event dict provided by third-party rules
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original_event: the original event being replaced
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for_batch: whether the event being created is part of a batch being created
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for batch persisting to the DB
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state_map: the current state prior to the new event
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prev_event_ids: the prev_events of the new event
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current_state_group: the state group prior to the event
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"""
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# Construct a new EventBuilder and validate it, which helps with the
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# rest of these checks.
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@ -2093,16 +2120,32 @@ class EventCreationHandler:
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for k, v in original_event.internal_metadata.get_dict().items():
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setattr(builder.internal_metadata, k, v)
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# modules can send new state events, so we re-calculate the auth events just in
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# case.
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prev_event_ids = await self.store.get_prev_events_for_room(builder.room_id)
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if for_batch:
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assert state_map is not None
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assert current_state_group is not None
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assert prev_event_ids is not None
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auth_event_ids = self._event_auth_handler.compute_auth_events(
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builder, state_map
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)
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event = await builder.build(
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prev_event_ids=prev_event_ids,
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auth_event_ids=auth_event_ids,
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)
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context = await self.state.compute_event_context_for_batched(
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event,
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state_ids_before_event=state_map,
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current_state_group=current_state_group,
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)
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else:
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# modules can send new state events, so we re-calculate the auth events just in
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# case.
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prev_event_ids = await self.store.get_prev_events_for_room(builder.room_id)
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event = await builder.build(
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prev_event_ids=prev_event_ids,
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auth_event_ids=None,
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)
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# we rebuild the event context, to be on the safe side. If nothing else,
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# delta_ids might need an update.
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context = await self.state.compute_event_context(event)
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event = await builder.build(
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prev_event_ids=prev_event_ids,
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auth_event_ids=None,
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)
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# we rebuild the event context, to be on the safe side. If nothing else,
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# delta_ids might need an update.
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context = await self.state.compute_event_context(event)
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return event, context
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