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@ -358,6 +358,10 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas
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This function is intentionally not cached because it is called to calculate the
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unread badge for push notifications and thus the result is expected to change.
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Note that this function assumes the user is a member of the room. Because
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summary rows are not removed when a user leaves a room, the caller must
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filter out those results from the result.
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Returns:
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A map of room ID to notification counts for the given user.
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"""
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@ -370,170 +374,127 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas
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def _get_unread_counts_by_room_for_user_txn(
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self, txn: LoggingTransaction, user_id: str
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) -> Dict[str, int]:
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# To get the badge count of all rooms we need to make three queries:
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# 1. Fetch all counts from `event_push_summary`, discarding any stale
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# rooms.
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# 2. Fetch all notifications from `event_push_actions` that haven't
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# been rotated yet.
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# 3. Fetch all notifications from `event_push_actions` for the stale
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# rooms.
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#
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# The "stale room" scenario generally happens when there is a new read
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# receipt that hasn't yet been processed to update the
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# `event_push_summary` table. When that happens we ignore the
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# `event_push_summary` table for that room and calculate the count
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# manually from `event_push_actions`.
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# We need to only take into account read receipts of these types.
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receipt_types_clause, receipt_types_args = make_in_list_sql_clause(
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receipt_types_clause, args = make_in_list_sql_clause(
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self.database_engine,
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"receipt_type",
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(ReceiptTypes.READ, ReceiptTypes.READ_PRIVATE),
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)
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args.extend([user_id, user_id])
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# Step 1, fetch all counts from `event_push_summary` for the user. This
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# is slightly convoluted as we also need to pull out the stream ordering
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# of the most recent receipt of the user in the room (either a thread
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# aware receipt or thread unaware receipt) in order to determine
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# whether the row in `event_push_summary` is stale. Hence the outer
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# GROUP BY and odd join condition against `receipts_linearized`.
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sql = f"""
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SELECT room_id, notif_count, stream_ordering, thread_id, last_receipt_stream_ordering,
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MAX(receipt_stream_ordering)
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FROM (
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SELECT e.room_id, notif_count, e.stream_ordering, e.thread_id, last_receipt_stream_ordering,
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ev.stream_ordering AS receipt_stream_ordering
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FROM event_push_summary AS e
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INNER JOIN local_current_membership USING (user_id, room_id)
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LEFT JOIN receipts_linearized AS r ON (
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e.user_id = r.user_id
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AND e.room_id = r.room_id
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AND (e.thread_id = r.thread_id OR r.thread_id IS NULL)
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AND {receipt_types_clause}
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receipts_cte = f"""
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WITH all_receipts AS (
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SELECT room_id, thread_id, MAX(event_stream_ordering) AS max_receipt_stream_ordering
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FROM receipts_linearized
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LEFT JOIN events USING (room_id, event_id)
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WHERE
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{receipt_types_clause}
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AND user_id = ?
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GROUP BY room_id, thread_id
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)
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LEFT JOIN events AS ev ON (r.event_id = ev.event_id)
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WHERE e.user_id = ? and notif_count > 0
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) AS es
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GROUP BY room_id, notif_count, stream_ordering, thread_id, last_receipt_stream_ordering
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"""
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txn.execute(
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sql,
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receipt_types_args
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+ [
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user_id,
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],
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)
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receipts_joins = """
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LEFT JOIN (
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SELECT room_id, thread_id,
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max_receipt_stream_ordering AS threaded_receipt_stream_ordering
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FROM all_receipts
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WHERE thread_id IS NOT NULL
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) AS threaded_receipts USING (room_id, thread_id)
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LEFT JOIN (
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SELECT room_id, thread_id,
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max_receipt_stream_ordering AS unthreaded_receipt_stream_ordering
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FROM all_receipts
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WHERE thread_id IS NULL
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) AS unthreaded_receipts USING (room_id)
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"""
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# First get summary counts by room / thread for the user. We use the max receipt
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# stream ordering of both threaded & unthreaded receipts to compare against the
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# summary table.
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#
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# PostgreSQL and SQLite differ in comparing scalar numerics.
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if isinstance(self.database_engine, PostgresEngine):
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# GREATEST ignores NULLs.
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max_clause = """GREATEST(
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threaded_receipt_stream_ordering,
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unthreaded_receipt_stream_ordering
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)"""
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else:
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# MAX returns NULL if any are NULL, so COALESCE to 0 first.
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max_clause = """MAX(
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COALESCE(threaded_receipt_stream_ordering, 0),
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COALESCE(unthreaded_receipt_stream_ordering, 0)
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)"""
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sql = f"""
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{receipts_cte}
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SELECT eps.room_id, eps.thread_id, notif_count
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FROM event_push_summary AS eps
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{receipts_joins}
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WHERE user_id = ?
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AND notif_count != 0
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AND (
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(last_receipt_stream_ordering IS NULL AND stream_ordering > {max_clause})
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OR last_receipt_stream_ordering = {max_clause}
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)
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"""
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txn.execute(sql, args)
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seen_thread_ids = set()
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room_to_count: Dict[str, int] = defaultdict(int)
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stale_room_ids = set()
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for row in txn:
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room_id = row[0]
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notif_count = row[1]
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stream_ordering = row[2]
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_thread_id = row[3]
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last_receipt_stream_ordering = row[4]
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receipt_stream_ordering = row[5]
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if last_receipt_stream_ordering is None:
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if receipt_stream_ordering is None:
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for room_id, thread_id, notif_count in txn:
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room_to_count[room_id] += notif_count
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elif stream_ordering > receipt_stream_ordering:
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room_to_count[room_id] += notif_count
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else:
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# The latest read receipt from the user is after all the rows for
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# this room in `event_push_summary`. We ignore them, and
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# calculate the count from `event_push_actions` in step 3.
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pass
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elif last_receipt_stream_ordering == receipt_stream_ordering:
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room_to_count[room_id] += notif_count
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else:
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# The row is stale if `last_receipt_stream_ordering` is set and
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# *doesn't* match the latest receipt from the user.
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stale_room_ids.add(room_id)
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# Discard any stale rooms from `room_to_count`, as we will recalculate
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# them in step 3.
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for room_id in stale_room_ids:
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room_to_count.pop(room_id, None)
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# Step 2, basically the same query, except against `event_push_actions`
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# and only fetching rows inserted since the last rotation.
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rotated_upto_stream_ordering = self.db_pool.simple_select_one_onecol_txn(
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txn,
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table="event_push_summary_stream_ordering",
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keyvalues={},
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retcol="stream_ordering",
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)
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seen_thread_ids.add(thread_id)
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# Now get any event push actions that haven't been rotated using the same OR
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# join and filter by receipt and event push summary rotated up to stream ordering.
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sql = f"""
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SELECT room_id, thread_id
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FROM (
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SELECT e.room_id, e.stream_ordering, e.thread_id,
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ev.stream_ordering AS receipt_stream_ordering
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FROM event_push_actions AS e
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INNER JOIN local_current_membership USING (user_id, room_id)
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LEFT JOIN receipts_linearized AS r ON (
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e.user_id = r.user_id
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AND e.room_id = r.room_id
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AND (e.thread_id = r.thread_id OR r.thread_id IS NULL)
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AND {receipt_types_clause}
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{receipts_cte}
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SELECT epa.room_id, epa.thread_id, COUNT(CASE WHEN epa.notif = 1 THEN 1 END) AS notif_count
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FROM event_push_actions AS epa
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{receipts_joins}
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WHERE user_id = ?
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AND epa.notif = 1
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AND stream_ordering > (SELECT stream_ordering FROM event_push_summary_stream_ordering)
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AND (threaded_receipt_stream_ordering IS NULL OR stream_ordering > threaded_receipt_stream_ordering)
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AND (unthreaded_receipt_stream_ordering IS NULL OR stream_ordering > unthreaded_receipt_stream_ordering)
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GROUP BY epa.room_id, epa.thread_id
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"""
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txn.execute(sql, args)
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for room_id, thread_id, notif_count in txn:
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# Note: only count push actions we have valid summaries for with up to date receipt.
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if thread_id not in seen_thread_ids:
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continue
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room_to_count[room_id] += notif_count
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thread_id_clause, thread_ids_args = make_in_list_sql_clause(
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self.database_engine, "epa.thread_id", seen_thread_ids
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)
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LEFT JOIN events AS ev ON (r.event_id = ev.event_id)
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WHERE e.user_id = ? and notif > 0
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AND e.stream_ordering > ?
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) AS es
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GROUP BY room_id, stream_ordering, thread_id
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HAVING stream_ordering > COALESCE(MAX(receipt_stream_ordering), 0)
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# Finally re-check event_push_actions for any rooms not in the summary, ignoring
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# the rotated up-to position. This handles the case where a read receipt has arrived
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# but not been rotated meaning the summary table is out of date, so we go back to
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# the push actions table.
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sql = f"""
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{receipts_cte}
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SELECT epa.room_id, COUNT(CASE WHEN epa.notif = 1 THEN 1 END) AS notif_count
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FROM event_push_actions AS epa
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{receipts_joins}
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WHERE user_id = ?
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AND NOT {thread_id_clause}
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AND epa.notif = 1
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AND (threaded_receipt_stream_ordering IS NULL OR stream_ordering > threaded_receipt_stream_ordering)
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AND (unthreaded_receipt_stream_ordering IS NULL OR stream_ordering > unthreaded_receipt_stream_ordering)
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GROUP BY epa.room_id
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"""
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txn.execute(
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sql,
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receipt_types_args + [user_id, rotated_upto_stream_ordering],
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)
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for room_id, _thread_id in txn:
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# Again, we ignore any stale rooms.
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if room_id not in stale_room_ids:
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# For event push actions it is one notification per row.
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room_to_count[room_id] += 1
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args.extend(thread_ids_args)
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txn.execute(sql, args)
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# Step 3, if we have stale rooms then we need to recalculate the counts
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# from `event_push_actions`. Again, this is basically the same query as
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# above except without a lower bound on stream ordering and only against
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# a specific set of rooms.
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if stale_room_ids:
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room_id_clause, room_id_args = make_in_list_sql_clause(
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self.database_engine,
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"e.room_id",
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stale_room_ids,
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)
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sql = f"""
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SELECT room_id, thread_id
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FROM (
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SELECT e.room_id, e.stream_ordering, e.thread_id,
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ev.stream_ordering AS receipt_stream_ordering
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FROM event_push_actions AS e
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INNER JOIN local_current_membership USING (user_id, room_id)
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LEFT JOIN receipts_linearized AS r ON (
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e.user_id = r.user_id
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AND e.room_id = r.room_id
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AND (e.thread_id = r.thread_id OR r.thread_id IS NULL)
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AND {receipt_types_clause}
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)
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LEFT JOIN events AS ev ON (r.event_id = ev.event_id)
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WHERE e.user_id = ? and notif > 0
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AND {room_id_clause}
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) AS es
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GROUP BY room_id, stream_ordering, thread_id
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HAVING stream_ordering > COALESCE(MAX(receipt_stream_ordering), 0)
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"""
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txn.execute(
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sql,
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receipt_types_args + [user_id] + room_id_args,
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)
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for room_id, _ in txn:
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room_to_count[room_id] += 1
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for room_id, notif_count in txn:
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room_to_count[room_id] += notif_count
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return room_to_count
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Andrew Morgan