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Fix incorrect thread summaries when the latest event is edited. (#11992)

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If the latest event in a thread was edited than the original
event content was included in bundled aggregation for
threads instead of the edited event content.
This commit is contained in:
Patrick Cloke 2022-02-15 08:26:57 -05:00 • committed by GitHub
parent 85e24d9d2b
commit 45f45404de
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5 changed files with 107 additions and 31 deletions
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69
synapse/events/utils.py
View file

@ -425,6 +425,33 @@ class EventClientSerializer:
return serialized_event
def _apply_edit(
self, orig_event: EventBase, serialized_event: JsonDict, edit: EventBase
) -> None:
"""Replace the content, preserving existing relations of the serialized event.
Args:
orig_event: The original event.
serialized_event: The original event, serialized. This is modified.
edit: The event which edits the above.
"""
# Ensure we take copies of the edit content, otherwise we risk modifying
# the original event.
edit_content = edit.content.copy()
# Unfreeze the event content if necessary, so that we may modify it below
edit_content = unfreeze(edit_content)
serialized_event["content"] = edit_content.get("m.new_content", {})
# Check for existing relations
relates_to = orig_event.content.get("m.relates_to")
if relates_to:
# Keep the relations, ensuring we use a dict copy of the original
serialized_event["content"]["m.relates_to"] = relates_to.copy()
else:
serialized_event["content"].pop("m.relates_to", None)
def _inject_bundled_aggregations(
self,
event: EventBase,
@ -450,26 +477,11 @@ class EventClientSerializer:
serialized_aggregations[RelationTypes.REFERENCE] = aggregations.references
if aggregations.replace:
# If there is an edit replace the content, preserving existing
# relations.
# If there is an edit, apply it to the event.
edit = aggregations.replace
self._apply_edit(event, serialized_event, edit)
# Ensure we take copies of the edit content, otherwise we risk modifying
# the original event.
edit_content = edit.content.copy()
# Unfreeze the event content if necessary, so that we may modify it below
edit_content = unfreeze(edit_content)
serialized_event["content"] = edit_content.get("m.new_content", {})
# Check for existing relations
relates_to = event.content.get("m.relates_to")
if relates_to:
# Keep the relations, ensuring we use a dict copy of the original
serialized_event["content"]["m.relates_to"] = relates_to.copy()
else:
serialized_event["content"].pop("m.relates_to", None)
# Include information about it in the relations dict.
serialized_aggregations[RelationTypes.REPLACE] = {
"event_id": edit.event_id,
"origin_server_ts": edit.origin_server_ts,
@ -478,13 +490,22 @@ class EventClientSerializer:
# If this event is the start of a thread, include a summary of the replies.
if aggregations.thread:
thread = aggregations.thread
# Don't bundle aggregations as this could recurse forever.
serialized_latest_event = self.serialize_event(
thread.latest_event, time_now, bundle_aggregations=None
)
# Manually apply an edit, if one exists.
if thread.latest_edit:
self._apply_edit(
thread.latest_event, serialized_latest_event, thread.latest_edit
)
serialized_aggregations[RelationTypes.THREAD] = {
# Don't bundle aggregations as this could recurse forever.
"latest_event": self.serialize_event(
aggregations.thread.latest_event, time_now, bundle_aggregations=None
),
"count": aggregations.thread.count,
"current_user_participated": aggregations.thread.current_user_participated,
"latest_event": serialized_latest_event,
"count": thread.count,
"current_user_participated": thread.current_user_participated,
}
# Include the bundled aggregations in the event.

2
synapse/storage/databases/main/events_worker.py
View file

@ -408,7 +408,7 @@ class EventsWorkerStore(SQLBaseStore):
include the previous states content in the unsigned field.
allow_rejected: If True, return rejected events. Otherwise,
omits rejeted events from the response.
omits rejected events from the response.
Returns:
A mapping from event_id to event.

24
synapse/storage/databases/main/relations.py
View file

@ -53,8 +53,13 @@ logger = logging.getLogger(__name__)
@attr.s(slots=True, frozen=True, auto_attribs=True)
class _ThreadAggregation:
# The latest event in the thread.
latest_event: EventBase
# The latest edit to the latest event in the thread.
latest_edit: Optional[EventBase]
# The total number of events in the thread.
count: int
# True if the current user has sent an event to the thread.
current_user_participated: bool
@ -461,8 +466,8 @@ class RelationsWorkerStore(SQLBaseStore):
@cachedList(cached_method_name="get_thread_summary", list_name="event_ids")
async def _get_thread_summaries(
self, event_ids: Collection[str]
) -> Dict[str, Optional[Tuple[int, EventBase]]]:
"""Get the number of threaded replies and the latest reply (if any) for the given event.
) -> Dict[str, Optional[Tuple[int, EventBase, Optional[EventBase]]]]:
"""Get the number of threaded replies, the latest reply (if any), and the latest edit for that reply for the given event.
Args:
event_ids: Summarize the thread related to this event ID.
@ -471,8 +476,10 @@ class RelationsWorkerStore(SQLBaseStore):
A map of the thread summary each event. A missing event implies there
are no threaded replies.
Each summary includes the number of items in the thread and the most
recent response.
Each summary is a tuple of:
The number of events in the thread.
The most recent event in the thread.
The most recent edit to the most recent event in the thread, if applicable.
"""
def _get_thread_summaries_txn(
@ -558,6 +565,9 @@ class RelationsWorkerStore(SQLBaseStore):
latest_events = await self.get_events(latest_event_ids.values()) # type: ignore[attr-defined]
# Check to see if any of those events are edited.
latest_edits = await self._get_applicable_edits(latest_event_ids.values())
# Map to the event IDs to the thread summary.
#
# There might not be a summary due to there not being a thread or
@ -568,7 +578,8 @@ class RelationsWorkerStore(SQLBaseStore):
summary = None
if latest_event:
summary = (counts[parent_event_id], latest_event)
latest_edit = latest_edits.get(latest_event_id)
summary = (counts[parent_event_id], latest_event, latest_edit)
summaries[parent_event_id] = summary
return summaries
@ -828,11 +839,12 @@ class RelationsWorkerStore(SQLBaseStore):
)
for event_id, summary in summaries.items():
if summary:
thread_count, latest_thread_event = summary
thread_count, latest_thread_event, edit = summary
results.setdefault(
event_id, BundledAggregations()
).thread = _ThreadAggregation(
latest_event=latest_thread_event,
latest_edit=edit,
count=thread_count,
# If there's a thread summary it must also exist in the
# participated dictionary.