diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/config/server.py | 5 | ||||
| -rw-r--r-- | synapse/events/utils.py | 34 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/relations.py | 141 | ||||
| -rw-r--r-- | synapse/storage/relations.py | 225 |
4 files changed, 395 insertions, 10 deletions
diff --git a/synapse/config/server.py b/synapse/config/server.py index 7874cd9da7..f403477b54 100644 --- a/synapse/config/server.py +++ b/synapse/config/server.py @@ -100,6 +100,11 @@ class ServerConfig(Config): "block_non_admin_invites", False, ) + # Whether to enable experimental MSC1849 (aka relations) support + self.experimental_msc1849_support_enabled = config.get( + "experimental_msc1849_support_enabled", False, + ) + # Options to control access by tracking MAU self.limit_usage_by_mau = config.get("limit_usage_by_mau", False) self.max_mau_value = 0 diff --git a/synapse/events/utils.py b/synapse/events/utils.py index a5454556cc..16d0c64372 100644 --- a/synapse/events/utils.py +++ b/synapse/events/utils.py @@ -21,7 +21,7 @@ from frozendict import frozendict from twisted.internet import defer -from synapse.api.constants import EventTypes +from synapse.api.constants import EventTypes, RelationTypes from synapse.util.async_helpers import yieldable_gather_results from . import EventBase @@ -324,8 +324,12 @@ class EventClientSerializer(object): """ def __init__(self, hs): - pass + self.store = hs.get_datastore() + self.experimental_msc1849_support_enabled = ( + hs.config.experimental_msc1849_support_enabled + ) + @defer.inlineCallbacks def serialize_event(self, event, time_now, **kwargs): """Serializes a single event. @@ -337,8 +341,32 @@ class EventClientSerializer(object): Returns: Deferred[dict]: The serialized event """ + # To handle the case of presence events and the like + if not isinstance(event, EventBase): + defer.returnValue(event) + + event_id = event.event_id event = serialize_event(event, time_now, **kwargs) - return defer.succeed(event) + + # If MSC1849 is enabled then we need to look if thre are any relations + # we need to bundle in with the event + if self.experimental_msc1849_support_enabled: + annotations = yield self.store.get_aggregation_groups_for_event( + event_id, + ) + references = yield self.store.get_relations_for_event( + event_id, RelationTypes.REFERENCES, direction="f", + ) + + if annotations.chunk: + r = event["unsigned"].setdefault("m.relations", {}) + r[RelationTypes.ANNOTATION] = annotations.to_dict() + + if references.chunk: + r = event["unsigned"].setdefault("m.relations", {}) + r[RelationTypes.REFERENCES] = references.to_dict() + + defer.returnValue(event) def serialize_events(self, events, time_now, **kwargs): """Serializes multiple events. diff --git a/synapse/rest/client/v2_alpha/relations.py b/synapse/rest/client/v2_alpha/relations.py index c3ac73b8c7..f468409b68 100644 --- a/synapse/rest/client/v2_alpha/relations.py +++ b/synapse/rest/client/v2_alpha/relations.py @@ -23,7 +23,7 @@ import logging from twisted.internet import defer -from synapse.api.constants import EventTypes +from synapse.api.constants import EventTypes, RelationTypes from synapse.api.errors import SynapseError from synapse.http.servlet import ( RestServlet, @@ -141,12 +141,16 @@ class RelationPaginationServlet(RestServlet): ) limit = parse_integer(request, "limit", default=5) + from_token = parse_string(request, "from") + to_token = parse_string(request, "to") result = yield self.store.get_relations_for_event( event_id=parent_id, relation_type=relation_type, event_type=event_type, limit=limit, + from_token=from_token, + to_token=to_token, ) events = yield self.store.get_events_as_list( @@ -162,6 +166,141 @@ class RelationPaginationServlet(RestServlet): defer.returnValue((200, return_value)) +class RelationAggregationPaginationServlet(RestServlet): + """API to paginate aggregation groups of relations, e.g. paginate the + types and counts of the reactions on the events. + + Example request and response: + + GET /rooms/{room_id}/aggregations/{parent_id} + + { + chunk: [ + { + "type": "m.reaction", + "key": "👍", + "count": 3 + } + ] + } + """ + + PATTERNS = client_v2_patterns( + "/rooms/(?P<room_id>[^/]*)/aggregations/(?P<parent_id>[^/]*)" + "(/(?P<relation_type>[^/]*)(/(?P<event_type>[^/]*))?)?$", + releases=(), + ) + + def __init__(self, hs): + super(RelationAggregationPaginationServlet, self).__init__() + self.auth = hs.get_auth() + self.store = hs.get_datastore() + + @defer.inlineCallbacks + def on_GET(self, request, room_id, parent_id, relation_type=None, event_type=None): + requester = yield self.auth.get_user_by_req(request, allow_guest=True) + + yield self.auth.check_in_room_or_world_readable( + room_id, requester.user.to_string() + ) + + if relation_type not in (RelationTypes.ANNOTATION, None): + raise SynapseError(400, "Relation type must be 'annotation'") + + limit = parse_integer(request, "limit", default=5) + from_token = parse_string(request, "from") + to_token = parse_string(request, "to") + + res = yield self.store.get_aggregation_groups_for_event( + event_id=parent_id, + event_type=event_type, + limit=limit, + from_token=from_token, + to_token=to_token, + ) + + defer.returnValue((200, res.to_dict())) + + +class RelationAggregationGroupPaginationServlet(RestServlet): + """API to paginate within an aggregation group of relations, e.g. paginate + all the 👍 reactions on an event. + + Example request and response: + + GET /rooms/{room_id}/aggregations/{parent_id}/m.annotation/m.reaction/👍 + + { + chunk: [ + { + "type": "m.reaction", + "content": { + "m.relates_to": { + "rel_type": "m.annotation", + "key": "👍" + } + } + }, + ... + ] + } + """ + + PATTERNS = client_v2_patterns( + "/rooms/(?P<room_id>[^/]*)/aggregations/(?P<parent_id>[^/]*)" + "/(?P<relation_type>[^/]*)/(?P<event_type>[^/]*)/(?P<key>[^/]*)$", + releases=(), + ) + + def __init__(self, hs): + super(RelationAggregationGroupPaginationServlet, self).__init__() + self.auth = hs.get_auth() + self.store = hs.get_datastore() + self.clock = hs.get_clock() + self._event_serializer = hs.get_event_client_serializer() + + @defer.inlineCallbacks + def on_GET(self, request, room_id, parent_id, relation_type, event_type, key): + requester = yield self.auth.get_user_by_req(request, allow_guest=True) + + yield self.auth.check_in_room_or_world_readable( + room_id, requester.user.to_string() + ) + + if relation_type != RelationTypes.ANNOTATION: + raise SynapseError(400, "Relation type must be 'annotation'") + + limit = parse_integer(request, "limit", default=5) + from_token = parse_string(request, "from") + to_token = parse_string(request, "to") + + result = yield self.store.get_relations_for_event( + event_id=parent_id, + relation_type=relation_type, + event_type=event_type, + aggregation_key=key, + limit=limit, + from_token=from_token, + to_token=to_token, + ) + + events = yield self.store.get_events_as_list( + [c["event_id"] for c in result.chunk] + ) + + now = self.clock.time_msec() + events = yield self._event_serializer.serialize_events(events, now) + + return_value = result.to_dict() + return_value["chunk"] = events + + defer.returnValue((200, return_value)) + + defer.returnValue((200, return_value)) + + def register_servlets(hs, http_server): RelationSendServlet(hs).register(http_server) RelationPaginationServlet(hs).register(http_server) + RelationAggregationPaginationServlet(hs).register(http_server) + RelationAggregationGroupPaginationServlet(hs).register(http_server) diff --git a/synapse/storage/relations.py b/synapse/storage/relations.py index 31ef6679af..db4b842c97 100644 --- a/synapse/storage/relations.py +++ b/synapse/storage/relations.py @@ -18,7 +18,9 @@ import logging import attr from synapse.api.constants import RelationTypes +from synapse.api.errors import SynapseError from synapse.storage._base import SQLBaseStore +from synapse.storage.stream import generate_pagination_where_clause logger = logging.getLogger(__name__) @@ -29,19 +31,94 @@ class PaginationChunk(object): Attributes: chunk (list): The rows returned by pagination + next_batch (Any|None): Token to fetch next set of results with, if + None then there are no more results. + prev_batch (Any|None): Token to fetch previous set of results with, if + None then there are no previous results. """ chunk = attr.ib() + next_batch = attr.ib(default=None) + prev_batch = attr.ib(default=None) def to_dict(self): d = {"chunk": self.chunk} + if self.next_batch: + d["next_batch"] = self.next_batch.to_string() + + if self.prev_batch: + d["prev_batch"] = self.prev_batch.to_string() + return d +@attr.s +class RelationPaginationToken(object): + """Pagination token for relation pagination API. + + As the results are order by topological ordering, we can use the + `topological_ordering` and `stream_ordering` fields of the events at the + boundaries of the chunk as pagination tokens. + + Attributes: + topological (int): The topological ordering of the boundary event + stream (int): The stream ordering of the boundary event. + """ + + topological = attr.ib() + stream = attr.ib() + + @staticmethod + def from_string(string): + try: + t, s = string.split("-") + return RelationPaginationToken(int(t), int(s)) + except ValueError: + raise SynapseError(400, "Invalid token") + + def to_string(self): + return "%d-%d" % (self.topological, self.stream) + + +@attr.s +class AggregationPaginationToken(object): + """Pagination token for relation aggregation pagination API. + + As the results are order by count and then MAX(stream_ordering) of the + aggregation groups, we can just use them as our pagination token. + + Attributes: + count (int): The count of relations in the boundar group. + stream (int): The MAX stream ordering in the boundary group. + """ + + count = attr.ib() + stream = attr.ib() + + @staticmethod + def from_string(string): + try: + c, s = string.split("-") + return AggregationPaginationToken(int(c), int(s)) + except ValueError: + raise SynapseError(400, "Invalid token") + + def to_string(self): + return "%d-%d" % (self.count, self.stream) + + class RelationsStore(SQLBaseStore): def get_relations_for_event( - self, event_id, relation_type=None, event_type=None, limit=5, direction="b" + self, + event_id, + relation_type=None, + event_type=None, + aggregation_key=None, + limit=5, + direction="b", + from_token=None, + to_token=None, ): """Get a list of relations for an event, ordered by topological ordering. @@ -51,16 +128,26 @@ class RelationsStore(SQLBaseStore): type, if given. event_type (str|None): Only fetch events with this event type, if given. + aggregation_key (str|None): Only fetch events with this aggregation + key, if given. limit (int): Only fetch the most recent `limit` events. direction (str): Whether to fetch the most recent first (`"b"`) or the oldest first (`"f"`). + from_token (RelationPaginationToken|None): Fetch rows from the given + token, or from the start if None. + to_token (RelationPaginationToken|None): Fetch rows up to the given + token, or up to the end if None. Returns: Deferred[PaginationChunk]: List of event IDs that match relations requested. The rows are of the form `{"event_id": "..."}`. """ - # TODO: Pagination tokens + if from_token: + from_token = RelationPaginationToken.from_string(from_token) + + if to_token: + to_token = RelationPaginationToken.from_string(to_token) where_clause = ["relates_to_id = ?"] where_args = [event_id] @@ -73,12 +160,29 @@ class RelationsStore(SQLBaseStore): where_clause.append("type = ?") where_args.append(event_type) - order = "ASC" + if aggregation_key: + where_clause.append("aggregation_key = ?") + where_args.append(aggregation_key) + + pagination_clause = generate_pagination_where_clause( + direction=direction, + column_names=("topological_ordering", "stream_ordering"), + from_token=attr.astuple(from_token) if from_token else None, + to_token=attr.astuple(to_token) if to_token else None, + engine=self.database_engine, + ) + + if pagination_clause: + where_clause.append(pagination_clause) + if direction == "b": order = "DESC" + else: + order = "ASC" sql = """ - SELECT event_id FROM event_relations + SELECT event_id, topological_ordering, stream_ordering + FROM event_relations INNER JOIN events USING (event_id) WHERE %s ORDER BY topological_ordering %s, stream_ordering %s @@ -92,16 +196,125 @@ class RelationsStore(SQLBaseStore): def _get_recent_references_for_event_txn(txn): txn.execute(sql, where_args + [limit + 1]) - events = [{"event_id": row[0]} for row in txn] + last_topo_id = None + last_stream_id = None + events = [] + for row in txn: + events.append({"event_id": row[0]}) + last_topo_id = row[1] + last_stream_id = row[2] + + next_batch = None + if len(events) > limit and last_topo_id and last_stream_id: + next_batch = RelationPaginationToken(last_topo_id, last_stream_id) return PaginationChunk( - chunk=list(events[:limit]), + chunk=list(events[:limit]), next_batch=next_batch, prev_batch=from_token ) return self.runInteraction( "get_recent_references_for_event", _get_recent_references_for_event_txn ) + def get_aggregation_groups_for_event( + self, + event_id, + event_type=None, + limit=5, + direction="b", + from_token=None, + to_token=None, + ): + """Get a list of annotations on the event, 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_id (str): Fetch events that relate to this event ID. + event_type (str|None): Only fetch events with this event type, if + given. + limit (int): Only fetch the `limit` groups. + direction (str): Whether to fetch the highest count first (`"b"`) or + the lowest count first (`"f"`). + from_token (AggregationPaginationToken|None): Fetch rows from the + given token, or from the start if None. + to_token (AggregationPaginationToken|None): Fetch rows up to the + given token, or up to the end if None. + + + Returns: + Deferred[PaginationChunk]: List of groups of annotations that + match. Each row is a dict with `type`, `key` and `count` fields. + """ + + if from_token: + from_token = AggregationPaginationToken.from_string(from_token) + + if to_token: + to_token = AggregationPaginationToken.from_string(to_token) + + where_clause = ["relates_to_id = ?", "relation_type = ?"] + where_args = [event_id, RelationTypes.ANNOTATION] + + if event_type: + where_clause.append("type = ?") + where_args.append(event_type) + + having_clause = generate_pagination_where_clause( + direction=direction, + column_names=("COUNT(*)", "MAX(stream_ordering)"), + from_token=attr.astuple(from_token) if from_token else None, + to_token=attr.astuple(to_token) if to_token else None, + engine=self.database_engine, + ) + + if direction == "b": + order = "DESC" + else: + order = "ASC" + + if having_clause: + having_clause = "HAVING " + having_clause + else: + having_clause = "" + + sql = """ + SELECT type, aggregation_key, COUNT(*), MAX(stream_ordering) + FROM event_relations + INNER JOIN events USING (event_id) + WHERE {where_clause} + GROUP BY relation_type, type, aggregation_key + {having_clause} + ORDER BY COUNT(*) {order}, MAX(stream_ordering) {order} + LIMIT ? + """.format( + where_clause=" AND ".join(where_clause), + order=order, + having_clause=having_clause, + ) + + def _get_aggregation_groups_for_event_txn(txn): + txn.execute(sql, where_args + [limit + 1]) + + next_batch = None + events = [] + for row in txn: + events.append({"type": row[0], "key": row[1], "count": row[2]}) + next_batch = AggregationPaginationToken(row[2], row[3]) + + if len(events) <= limit: + next_batch = None + + return PaginationChunk( + chunk=list(events[:limit]), next_batch=next_batch, prev_batch=from_token + ) + + return self.runInteraction( + "get_aggregation_groups_for_event", _get_aggregation_groups_for_event_txn + ) + def _handle_event_relations(self, txn, event): """Handles inserting relation data during peristence of events |