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Remove support for aggregating reactions (#15172) 

It turns out that no clients rely on server-side aggregation of `m.annotation`
relationships: it's just not very useful as currently implemented.

It's also non-trivial to calculate.

I want to remove it from MSC2677, so to keep the implementation in line, let's
remove it here.
This commit is contained in:
Richard van der Hoff 2023-02-28 18:49:28 +00:00 committed by GitHub
parent b2fd03d075
commit 2b78981736
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8 changed files with 30 additions and 377 deletions
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1
changelog.d/15172.feature Normal file
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@ -0,0 +1 @@
Remove support for server-side aggregation of reactions.

5
synapse/events/utils.py
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@ -516,11 +516,6 @@ class EventClientSerializer:
# being serialized.
serialized_aggregations = {}
if event_aggregations.annotations:
serialized_aggregations[
RelationTypes.ANNOTATION
] = event_aggregations.annotations
if event_aggregations.references:
serialized_aggregations[
RelationTypes.REFERENCE

76
synapse/handlers/relations.py
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@ -60,13 +60,12 @@ class BundledAggregations:
Some values require additional processing during serialization.
"""
annotations: Optional[JsonDict] = None
references: Optional[JsonDict] = None
replace: Optional[EventBase] = None
thread: Optional[_ThreadAggregation] = None
def __bool__(self) -> bool:
return bool(self.annotations or self.references or self.replace or self.thread)
return bool(self.references or self.replace or self.thread)
class RelationsHandler:
@ -227,67 +226,6 @@ class RelationsHandler:
e.msg,
)
async def get_annotations_for_events(
self, event_ids: Collection[str], ignored_users: FrozenSet[str] = frozenset()
) -> Dict[str, List[JsonDict]]:
"""Get a list of annotations to the given events, grouped by event type and
aggregation key, sorted by count.
This is used e.g. to get the what and how many reactions have happened
on an event.
Args:
event_ids: Fetch events that relate to these event IDs.
ignored_users: The users ignored by the requesting user.
Returns:
A map of event IDs to a list of groups of annotations that match.
Each entry is a dict with `type`, `key` and `count` fields.
"""
# Get the base results for all users.
full_results = await self._main_store.get_aggregation_groups_for_events(
event_ids
)
# Avoid additional logic if there are no ignored users.
if not ignored_users:
return {
event_id: results
for event_id, results in full_results.items()
if results
}
# Then subtract off the results for any ignored users.
ignored_results = await self._main_store.get_aggregation_groups_for_users(
[event_id for event_id, results in full_results.items() if results],
ignored_users,
)
filtered_results = {}
for event_id, results in full_results.items():
# If no annotations, skip.
if not results:
continue
# If there are not ignored results for this event, copy verbatim.
if event_id not in ignored_results:
filtered_results[event_id] = results
continue
# Otherwise, subtract out the ignored results.
event_ignored_results = ignored_results[event_id]
for result in results:
key = (result["type"], result["key"])
if key in event_ignored_results:
# Ensure to not modify the cache.
result = result.copy()
result["count"] -= event_ignored_results[key]
if result["count"] <= 0:
continue
filtered_results.setdefault(event_id, []).append(result)
return filtered_results
async def get_references_for_events(
self, event_ids: Collection[str], ignored_users: FrozenSet[str] = frozenset()
) -> Dict[str, List[_RelatedEvent]]:
@ -531,17 +469,6 @@ class RelationsHandler:
# (as that is what makes it part of the thread).
relations_by_id[latest_thread_event.event_id] = RelationTypes.THREAD
async def _fetch_annotations() -> None:
"""Fetch any annotations (ie, reactions) to bundle with this event."""
annotations_by_event_id = await self.get_annotations_for_events(
events_by_id.keys(), ignored_users=ignored_users
)
for event_id, annotations in annotations_by_event_id.items():
if annotations:
results.setdefault(event_id, BundledAggregations()).annotations = {
"chunk": annotations
}
async def _fetch_references() -> None:
"""Fetch any references to bundle with this event."""
references_by_event_id = await self.get_references_for_events(
@ -575,7 +502,6 @@ class RelationsHandler:
await make_deferred_yieldable(
gather_results(
(
run_in_background(_fetch_annotations),
run_in_background(_fetch_references),
run_in_background(_fetch_edits),
)

3
synapse/storage/databases/main/cache.py
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@ -266,9 +266,6 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
if relates_to:
self._attempt_to_invalidate_cache("get_relations_for_event", (relates_to,))
self._attempt_to_invalidate_cache("get_references_for_event", (relates_to,))
self._attempt_to_invalidate_cache(
"get_aggregation_groups_for_event", (relates_to,)
)
self._attempt_to_invalidate_cache("get_applicable_edit", (relates_to,))
self._attempt_to_invalidate_cache("get_thread_summary", (relates_to,))
self._attempt_to_invalidate_cache("get_thread_participated", (relates_to,))

4
synapse/storage/databases/main/events.py
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@ -2024,10 +2024,6 @@ class PersistEventsStore:
self.store._invalidate_cache_and_stream(
txn, self.store.get_relations_for_event, (redacted_relates_to,)
)
if rel_type == RelationTypes.ANNOTATION:
self.store._invalidate_cache_and_stream(
txn, self.store.get_aggregation_groups_for_event, (redacted_relates_to,)
)
if rel_type == RelationTypes.REFERENCE:
self.store._invalidate_cache_and_stream(
txn, self.store.get_references_for_event, (redacted_relates_to,)

3
synapse/storage/databases/main/events_bg_updates.py
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@ -1219,9 +1219,6 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
self._invalidate_cache_and_stream( # type: ignore[attr-defined]
txn, self.get_relations_for_event, cache_tuple # type: ignore[attr-defined]
)
self._invalidate_cache_and_stream( # type: ignore[attr-defined]
txn, self.get_aggregation_groups_for_event, cache_tuple # type: ignore[attr-defined]
)
self._invalidate_cache_and_stream( # type: ignore[attr-defined]
txn, self.get_thread_summary, cache_tuple # type: ignore[attr-defined]
)

137
synapse/storage/databases/main/relations.py
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@ -397,143 +397,6 @@ class RelationsWorkerStore(SQLBaseStore):
)
return result is not None
@cached()
async def get_aggregation_groups_for_event(
self, event_id: str
) -> Sequence[JsonDict]:
raise NotImplementedError()
@cachedList(
cached_method_name="get_aggregation_groups_for_event", list_name="event_ids"
)
async def get_aggregation_groups_for_events(
self, event_ids: Collection[str]
) -> Mapping[str, Optional[List[JsonDict]]]:
"""Get a list of annotations on the given events, grouped by event type and
aggregation key, sorted by count.
This is used e.g. to get the what and how many reactions have happend
on an event.
Args:
event_ids: Fetch events that relate to these event IDs.
Returns:
A map of event IDs to a list of groups of annotations that match.
Each entry is a dict with `type`, `key` and `count` fields.
"""
# The number of entries to return per event ID.
limit = 5
clause, args = make_in_list_sql_clause(
self.database_engine, "relates_to_id", event_ids
)
args.append(RelationTypes.ANNOTATION)
sql = f"""
SELECT
relates_to_id,
annotation.type,
aggregation_key,
COUNT(DISTINCT annotation.sender)
FROM events AS annotation
INNER JOIN event_relations USING (event_id)
INNER JOIN events AS parent ON
parent.event_id = relates_to_id
AND parent.room_id = annotation.room_id
WHERE
{clause}
AND relation_type = ?
GROUP BY relates_to_id, annotation.type, aggregation_key
ORDER BY relates_to_id, COUNT(*) DESC
"""
def _get_aggregation_groups_for_events_txn(
txn: LoggingTransaction,
) -> Mapping[str, List[JsonDict]]:
txn.execute(sql, args)
result: Dict[str, List[JsonDict]] = {}
for event_id, type, key, count in cast(
List[Tuple[str, str, str, int]], txn
):
event_results = result.setdefault(event_id, [])
# Limit the number of results per event ID.
if len(event_results) == limit:
continue
event_results.append({"type": type, "key": key, "count": count})
return result
return await self.db_pool.runInteraction(
"get_aggregation_groups_for_events", _get_aggregation_groups_for_events_txn
)
async def get_aggregation_groups_for_users(
self, event_ids: Collection[str], users: FrozenSet[str]
) -> Dict[str, Dict[Tuple[str, str], int]]:
"""Fetch the partial aggregations for an event for specific users.
This is used, in conjunction with get_aggregation_groups_for_event, to
remove information from the results for ignored users.
Args:
event_ids: Fetch events that relate to these event IDs.
users: The users to fetch information for.
Returns:
A map of event ID to a map of (event type, aggregation key) to a
count of users.
"""
if not users:
return {}
events_sql, args = make_in_list_sql_clause(
self.database_engine, "relates_to_id", event_ids
)
users_sql, users_args = make_in_list_sql_clause(
self.database_engine, "annotation.sender", users
)
args.extend(users_args)
args.append(RelationTypes.ANNOTATION)
sql = f"""
SELECT
relates_to_id,
annotation.type,
aggregation_key,
COUNT(DISTINCT annotation.sender)
FROM events AS annotation
INNER JOIN event_relations USING (event_id)
INNER JOIN events AS parent ON
parent.event_id = relates_to_id
AND parent.room_id = annotation.room_id
WHERE {events_sql} AND {users_sql} AND relation_type = ?
GROUP BY relates_to_id, annotation.type, aggregation_key
ORDER BY relates_to_id, COUNT(*) DESC
"""
def _get_aggregation_groups_for_users_txn(
txn: LoggingTransaction,
) -> Dict[str, Dict[Tuple[str, str], int]]:
txn.execute(sql, args)
result: Dict[str, Dict[Tuple[str, str], int]] = {}
for event_id, type, key, count in cast(
List[Tuple[str, str, str, int]], txn
):
result.setdefault(event_id, {})[(type, key)] = count
return result
return await self.db_pool.runInteraction(
"get_aggregation_groups_for_users", _get_aggregation_groups_for_users_txn
)
@cached()
async def get_references_for_event(self, event_id: str) -> List[JsonDict]:
raise NotImplementedError()

178
tests/rest/client/test_relations.py
View File

@ -1080,48 +1080,6 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
]
assert_bundle(self._find_event_in_chunk(chunk))
def test_annotation(self) -> None:
"""
Test that annotations get correctly bundled.
"""
# Setup by sending a variety of relations.
self._send_relation(RelationTypes.ANNOTATION, "m.reaction", "a")
self._send_relation(
RelationTypes.ANNOTATION, "m.reaction", "a", access_token=self.user2_token
)
self._send_relation(RelationTypes.ANNOTATION, "m.reaction", "b")
def assert_annotations(bundled_aggregations: JsonDict) -> None:
self.assertEqual(
{
"chunk": [
{"type": "m.reaction", "key": "a", "count": 2},
{"type": "m.reaction", "key": "b", "count": 1},
]
},
bundled_aggregations,
)
self._test_bundled_aggregations(RelationTypes.ANNOTATION, assert_annotations, 7)
def test_annotation_to_annotation(self) -> None:
"""Any relation to an annotation should be ignored."""
channel = self._send_relation(RelationTypes.ANNOTATION, "m.reaction", "a")
event_id = channel.json_body["event_id"]
self._send_relation(
RelationTypes.ANNOTATION, "m.reaction", "b", parent_id=event_id
)
# Fetch the initial annotation event to see if it has bundled aggregations.
channel = self.make_request(
"GET",
f"/_matrix/client/v3/rooms/{self.room}/event/{event_id}",
access_token=self.user_token,
)
self.assertEquals(200, channel.code, channel.json_body)
# The first annotationt should not have any bundled aggregations.
self.assertNotIn("m.relations", channel.json_body["unsigned"])
def test_reference(self) -> None:
"""
Test that references get correctly bundled.
@ -1138,7 +1096,7 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
bundled_aggregations,
)
self._test_bundled_aggregations(RelationTypes.REFERENCE, assert_annotations, 7)
self._test_bundled_aggregations(RelationTypes.REFERENCE, assert_annotations, 6)
def test_thread(self) -> None:
"""
@ -1183,7 +1141,7 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
# The "user" sent the root event and is making queries for the bundled
# aggregations: they have participated.
self._test_bundled_aggregations(RelationTypes.THREAD, _gen_assert(True), 7)
self._test_bundled_aggregations(RelationTypes.THREAD, _gen_assert(True), 6)
# The "user2" sent replies in the thread and is making queries for the
# bundled aggregations: they have participated.
#
@ -1208,9 +1166,10 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
channel = self._send_relation(RelationTypes.THREAD, "m.room.test")
thread_2 = channel.json_body["event_id"]
self._send_relation(
RelationTypes.ANNOTATION, "m.reaction", "a", parent_id=thread_2
channel = self._send_relation(
RelationTypes.REFERENCE, "org.matrix.test", parent_id=thread_2
)
reference_event_id = channel.json_body["event_id"]
def assert_thread(bundled_aggregations: JsonDict) -> None:
self.assertEqual(2, bundled_aggregations.get("count"))
@ -1235,17 +1194,15 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
self.assert_dict(
{
"m.relations": {
RelationTypes.ANNOTATION: {
"chunk": [
{"type": "m.reaction", "key": "a", "count": 1},
]
RelationTypes.REFERENCE: {
"chunk": [{"event_id": reference_event_id}]
},
}
},
bundled_aggregations["latest_event"].get("unsigned"),
)
self._test_bundled_aggregations(RelationTypes.THREAD, assert_thread, 7)
self._test_bundled_aggregations(RelationTypes.THREAD, assert_thread, 6)
def test_nested_thread(self) -> None:
"""
@ -1363,10 +1320,11 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
channel = self._send_relation(RelationTypes.THREAD, "m.room.test")
thread_id = channel.json_body["event_id"]
# Annotate the thread.
self._send_relation(
RelationTypes.ANNOTATION, "m.reaction", "a", parent_id=thread_id
# Make a reference to the thread.
channel = self._send_relation(
RelationTypes.REFERENCE, "org.matrix.test", parent_id=thread_id
)
reference_event_id = channel.json_body["event_id"]
channel = self.make_request(
"GET",
@ -1377,9 +1335,7 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
self.assertEqual(
channel.json_body["unsigned"].get("m.relations"),
{
RelationTypes.ANNOTATION: {
"chunk": [{"count": 1, "key": "a", "type": "m.reaction"}]
},
RelationTypes.REFERENCE: {"chunk": [{"event_id": reference_event_id}]},
},
)
@ -1396,9 +1352,7 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
self.assertEqual(
thread_message["unsigned"].get("m.relations"),
{
RelationTypes.ANNOTATION: {
"chunk": [{"count": 1, "key": "a", "type": "m.reaction"}]
},
RelationTypes.REFERENCE: {"chunk": [{"event_id": reference_event_id}]},
},
)
@ -1410,7 +1364,8 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
Note that the spec allows for a server to return additional fields beyond
what is specified.
"""
self._send_relation(RelationTypes.ANNOTATION, "m.reaction", "a")
channel = self._send_relation(RelationTypes.REFERENCE, "org.matrix.test")
reference_event_id = channel.json_body["event_id"]
# Note that the sync filter does not include "unsigned" as a field.
filter = urllib.parse.quote_plus(
@ -1428,7 +1383,12 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
# Ensure there's bundled aggregations on it.
self.assertIn("unsigned", parent_event)
self.assertIn("m.relations", parent_event["unsigned"])
self.assertEqual(
parent_event["unsigned"].get("m.relations"),
{
RelationTypes.REFERENCE: {"chunk": [{"event_id": reference_event_id}]},
},
)
class RelationIgnoredUserTestCase(BaseRelationsTestCase):
@ -1475,53 +1435,8 @@ class RelationIgnoredUserTestCase(BaseRelationsTestCase):
return before_aggregations[relation_type], after_aggregations[relation_type]
def test_annotation(self) -> None:
"""Annotations should ignore"""
# Send 2 from us, 2 from the to be ignored user.
allowed_event_ids = []
ignored_event_ids = []
channel = self._send_relation(RelationTypes.ANNOTATION, "m.reaction", key="a")
allowed_event_ids.append(channel.json_body["event_id"])
channel = self._send_relation(RelationTypes.ANNOTATION, "m.reaction", key="b")
allowed_event_ids.append(channel.json_body["event_id"])
channel = self._send_relation(
RelationTypes.ANNOTATION,
"m.reaction",
key="a",
access_token=self.user2_token,
)
ignored_event_ids.append(channel.json_body["event_id"])
channel = self._send_relation(
RelationTypes.ANNOTATION,
"m.reaction",
key="c",
access_token=self.user2_token,
)
ignored_event_ids.append(channel.json_body["event_id"])
before_aggregations, after_aggregations = self._test_ignored_user(
RelationTypes.ANNOTATION, allowed_event_ids, ignored_event_ids
)
self.assertCountEqual(
before_aggregations["chunk"],
[
{"type": "m.reaction", "key": "a", "count": 2},
{"type": "m.reaction", "key": "b", "count": 1},
{"type": "m.reaction", "key": "c", "count": 1},
],
)
self.assertCountEqual(
after_aggregations["chunk"],
[
{"type": "m.reaction", "key": "a", "count": 1},
{"type": "m.reaction", "key": "b", "count": 1},
],
)
def test_reference(self) -> None:
"""Annotations should ignore"""
"""Aggregations should exclude reference relations from ignored users"""
channel = self._send_relation(RelationTypes.REFERENCE, "m.room.test")
allowed_event_ids = [channel.json_body["event_id"]]
@ -1544,7 +1459,7 @@ class RelationIgnoredUserTestCase(BaseRelationsTestCase):
)
def test_thread(self) -> None:
"""Annotations should ignore"""
"""Aggregations should exclude thread releations from ignored users"""
channel = self._send_relation(RelationTypes.THREAD, "m.room.test")
allowed_event_ids = [channel.json_body["event_id"]]
@ -1618,43 +1533,6 @@ class RelationRedactionTestCase(BaseRelationsTestCase):
for t in threads
]
def test_redact_relation_annotation(self) -> None:
"""
Test that annotations of an event are properly handled after the
annotation is redacted.
The redacted relation should not be included in bundled aggregations or
the response to relations.
"""
channel = self._send_relation(RelationTypes.ANNOTATION, "m.reaction", "a")
to_redact_event_id = channel.json_body["event_id"]
channel = self._send_relation(
RelationTypes.ANNOTATION, "m.reaction", "a", access_token=self.user2_token
)
unredacted_event_id = channel.json_body["event_id"]
# Both relations should exist.
event_ids = self._get_related_events()
relations = self._get_bundled_aggregations()
self.assertCountEqual(event_ids, [to_redact_event_id, unredacted_event_id])
self.assertEquals(
relations["m.annotation"],
{"chunk": [{"type": "m.reaction", "key": "a", "count": 2}]},
)
# Redact one of the reactions.
self._redact(to_redact_event_id)
# The unredacted relation should still exist.
event_ids = self._get_related_events()
relations = self._get_bundled_aggregations()
self.assertEquals(event_ids, [unredacted_event_id])
self.assertEquals(
relations["m.annotation"],
{"chunk": [{"type": "m.reaction", "key": "a", "count": 1}]},
)
def test_redact_relation_thread(self) -> None:
"""
Test that thread replies are properly handled after the thread reply redacted.
@ -1775,14 +1653,14 @@ class RelationRedactionTestCase(BaseRelationsTestCase):
is redacted.
"""
# Add a relation
channel = self._send_relation(RelationTypes.ANNOTATION, "m.reaction", key="👍")
channel = self._send_relation(RelationTypes.REFERENCE, "org.matrix.test")
related_event_id = channel.json_body["event_id"]
# The relations should exist.
event_ids = self._get_related_events()
relations = self._get_bundled_aggregations()
self.assertEqual(len(event_ids), 1)
self.assertIn(RelationTypes.ANNOTATION, relations)
self.assertIn(RelationTypes.REFERENCE, relations)
# Redact the original event.
self._redact(self.parent_id)
@ -1792,8 +1670,8 @@ class RelationRedactionTestCase(BaseRelationsTestCase):
relations = self._get_bundled_aggregations()
self.assertEquals(event_ids, [related_event_id])
self.assertEquals(
relations["m.annotation"],
{"chunk": [{"type": "m.reaction", "key": "👍", "count": 1}]},
relations[RelationTypes.REFERENCE],
{"chunk": [{"event_id": related_event_id}]},
)
def test_redact_parent_thread(self) -> None: