diff options
Diffstat (limited to 'synapse/storage/databases/main/relations.py')
| -rw-r--r-- | synapse/storage/databases/main/relations.py | 222 |
1 files changed, 149 insertions, 73 deletions
diff --git a/synapse/storage/databases/main/relations.py b/synapse/storage/databases/main/relations.py index ad79cc5610..e2c27e594b 100644 --- a/synapse/storage/databases/main/relations.py +++ b/synapse/storage/databases/main/relations.py @@ -20,6 +20,7 @@ from typing import ( Iterable, List, Optional, + Set, Tuple, Union, cast, @@ -454,106 +455,175 @@ class RelationsWorkerStore(SQLBaseStore): } @cached() - async def get_thread_summary( - self, event_id: str, room_id: str - ) -> Tuple[int, Optional[EventBase]]: + def get_thread_summary(self, event_id: str) -> Optional[Tuple[int, EventBase]]: + raise NotImplementedError() + + @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. Args: - event_id: Summarize the thread related to this event ID. - room_id: The room the event belongs to. + event_ids: Summarize the thread related to this event ID. Returns: - The number of items in the thread and the most recent response, if any. + 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. """ - def _get_thread_summary_txn( + def _get_thread_summaries_txn( txn: LoggingTransaction, - ) -> Tuple[int, Optional[str]]: - # Fetch the latest event ID in the thread. + ) -> Tuple[Dict[str, int], Dict[str, str]]: + # Fetch the count of threaded events and the latest event ID. # TODO Should this only allow m.room.message events. - sql = """ - SELECT event_id - FROM event_relations - INNER JOIN events USING (event_id) - WHERE - relates_to_id = ? - AND room_id = ? - AND relation_type = ? - ORDER BY topological_ordering DESC, stream_ordering DESC - LIMIT 1 - """ + if isinstance(self.database_engine, PostgresEngine): + # The `DISTINCT ON` clause will pick the *first* row it encounters, + # so ordering by topologica ordering + stream ordering desc will + # ensure we get the latest event in the thread. + sql = """ + SELECT DISTINCT ON (parent.event_id) parent.event_id, child.event_id FROM events AS child + INNER JOIN event_relations USING (event_id) + INNER JOIN events AS parent ON + parent.event_id = relates_to_id + AND parent.room_id = child.room_id + WHERE + %s + AND relation_type = ? + ORDER BY parent.event_id, child.topological_ordering DESC, child.stream_ordering DESC + """ + else: + # SQLite uses a simplified query which returns all entries for a + # thread. The first result for each thread is chosen to and subsequent + # results for a thread are ignored. + sql = """ + SELECT parent.event_id, child.event_id FROM events AS child + INNER JOIN event_relations USING (event_id) + INNER JOIN events AS parent ON + parent.event_id = relates_to_id + AND parent.room_id = child.room_id + WHERE + %s + AND relation_type = ? + ORDER BY child.topological_ordering DESC, child.stream_ordering DESC + """ + + clause, args = make_in_list_sql_clause( + txn.database_engine, "relates_to_id", event_ids + ) + args.append(RelationTypes.THREAD) - txn.execute(sql, (event_id, room_id, RelationTypes.THREAD)) - row = txn.fetchone() - if row is None: - return 0, None + txn.execute(sql % (clause,), args) + latest_event_ids = {} + for parent_event_id, child_event_id in txn: + # Only consider the latest threaded reply (by topological ordering). + if parent_event_id not in latest_event_ids: + latest_event_ids[parent_event_id] = child_event_id - latest_event_id = row[0] + # If no threads were found, bail. + if not latest_event_ids: + return {}, latest_event_ids # Fetch the number of threaded replies. sql = """ - SELECT COUNT(event_id) - FROM event_relations - INNER JOIN events USING (event_id) + SELECT parent.event_id, COUNT(child.event_id) FROM events AS child + INNER JOIN event_relations USING (event_id) + INNER JOIN events AS parent ON + parent.event_id = relates_to_id + AND parent.room_id = child.room_id WHERE - relates_to_id = ? - AND room_id = ? + %s AND relation_type = ? + GROUP BY parent.event_id """ - txn.execute(sql, (event_id, room_id, RelationTypes.THREAD)) - count = cast(Tuple[int], txn.fetchone())[0] - return count, latest_event_id + # Regenerate the arguments since only threads found above could + # possibly have any replies. + clause, args = make_in_list_sql_clause( + txn.database_engine, "relates_to_id", latest_event_ids.keys() + ) + args.append(RelationTypes.THREAD) + + txn.execute(sql % (clause,), args) + counts = dict(cast(List[Tuple[str, int]], txn.fetchall())) - count, latest_event_id = await self.db_pool.runInteraction( - "get_thread_summary", _get_thread_summary_txn + return counts, latest_event_ids + + counts, latest_event_ids = await self.db_pool.runInteraction( + "get_thread_summaries", _get_thread_summaries_txn ) - latest_event = None - if latest_event_id: - latest_event = await self.get_event(latest_event_id, allow_none=True) # type: ignore[attr-defined] + latest_events = await self.get_events(latest_event_ids.values()) # type: ignore[attr-defined] + + # Map to the event IDs to the thread summary. + # + # There might not be a summary due to there not being a thread or + # due to the latest event not being known, either case is treated the same. + summaries = {} + for parent_event_id, latest_event_id in latest_event_ids.items(): + latest_event = latest_events.get(latest_event_id) + + summary = None + if latest_event: + summary = (counts[parent_event_id], latest_event) + summaries[parent_event_id] = summary - return count, latest_event + return summaries @cached() - async def get_thread_participated( - self, event_id: str, room_id: str, user_id: str - ) -> bool: - """Get whether the requesting user participated in a thread. + def get_thread_participated(self, event_id: str, user_id: str) -> bool: + raise NotImplementedError() - This is separate from get_thread_summary since that can be cached across - all users while this value is specific to the requeser. + @cachedList(cached_method_name="get_thread_participated", list_name="event_ids") + async def _get_threads_participated( + self, event_ids: Collection[str], user_id: str + ) -> Dict[str, bool]: + """Get whether the requesting user participated in the given threads. + + This is separate from get_thread_summaries since that can be cached across + all users while this value is specific to the requester. Args: - event_id: The thread related to this event ID. - room_id: The room the event belongs to. + event_ids: The thread related to these event IDs. user_id: The user requesting the summary. Returns: - True if the requesting user participated in the thread, otherwise false. + A map of event ID to a boolean which represents if the requesting + user participated in that event's thread, otherwise false. """ - def _get_thread_summary_txn(txn: LoggingTransaction) -> bool: + def _get_thread_summary_txn(txn: LoggingTransaction) -> Set[str]: # Fetch whether the requester has participated or not. sql = """ - SELECT 1 - FROM event_relations - INNER JOIN events USING (event_id) + SELECT DISTINCT relates_to_id + FROM events AS child + INNER JOIN event_relations USING (event_id) + INNER JOIN events AS parent ON + parent.event_id = relates_to_id + AND parent.room_id = child.room_id WHERE - relates_to_id = ? - AND room_id = ? + %s AND relation_type = ? - AND sender = ? + AND child.sender = ? """ - txn.execute(sql, (event_id, room_id, RelationTypes.THREAD, user_id)) - return bool(txn.fetchone()) + clause, args = make_in_list_sql_clause( + txn.database_engine, "relates_to_id", event_ids + ) + args.extend((RelationTypes.THREAD, user_id)) - return await self.db_pool.runInteraction( + txn.execute(sql % (clause,), args) + return {row[0] for row in txn.fetchall()} + + participated_threads = await self.db_pool.runInteraction( "get_thread_summary", _get_thread_summary_txn ) + return {event_id: event_id in participated_threads for event_id in event_ids} + async def events_have_relations( self, parent_ids: List[str], @@ -700,21 +770,6 @@ class RelationsWorkerStore(SQLBaseStore): if references.chunk: aggregations.references = await references.to_dict(cast("DataStore", self)) - # If this event is the start of a thread, include a summary of the replies. - if self._msc3440_enabled: - thread_count, latest_thread_event = await self.get_thread_summary( - event_id, room_id - ) - participated = await self.get_thread_participated( - event_id, room_id, user_id - ) - if latest_thread_event: - aggregations.thread = _ThreadAggregation( - latest_event=latest_thread_event, - count=thread_count, - current_user_participated=participated, - ) - # Store the bundled aggregations in the event metadata for later use. return aggregations @@ -763,6 +818,27 @@ class RelationsWorkerStore(SQLBaseStore): for event_id, edit in edits.items(): results.setdefault(event_id, BundledAggregations()).replace = edit + # Fetch thread summaries. + if self._msc3440_enabled: + summaries = await self._get_thread_summaries(seen_event_ids) + # Only fetch participated for a limited selection based on what had + # summaries. + participated = await self._get_threads_participated( + summaries.keys(), user_id + ) + for event_id, summary in summaries.items(): + if summary: + thread_count, latest_thread_event = summary + results.setdefault( + event_id, BundledAggregations() + ).thread = _ThreadAggregation( + latest_event=latest_thread_event, + count=thread_count, + # If there's a thread summary it must also exist in the + # participated dictionary. + current_user_participated=participated[event_id], + ) + return results |