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# -*- coding: utf-8 -*-
# Copyright 2014 matrix.org
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer
from ._base import SQLBaseStore
from synapse.api.constants import Membership
import json
import logging
logger = logging.getLogger(__name__)
MAX_STREAM_SIZE = 1000
class StreamStore(SQLBaseStore):
@defer.inlineCallbacks
def get_room_events_stream(self, user_id, from_key, to_key, room_id,
limit=0, with_feedback=False):
# TODO (erikj): Handle compressed feedback
current_room_membership_sql = (
"SELECT m.room_id FROM room_memberships as m "
"INNER JOIN current_state_events as c ON m.event_id = c.event_id "
"WHERE m.user_id = ?"
)
invites_sql = (
"SELECT m.event_id FROM room_memberships as m "
"INNER JOIN current_state_events as c ON m.event_id = c.event_id "
"WHERE m.user_id = ? AND m.membership = ?"
)
if limit:
limit = max(limit, MAX_STREAM_SIZE)
else:
limit = MAX_STREAM_SIZE
# From and to keys should be integers from ordering.
from_key = int(from_key)
to_key = int(to_key)
if from_key == to_key:
defer.returnValue(([], to_key))
return
sql = (
"SELECT * FROM events as e WHERE "
"((room_id IN (%(current)s)) OR "
"(event_id IN (%(invites)s))) "
) % {
"current": current_room_membership_sql,
"invites": invites_sql,
}
# Constraints and ordering depend on direction.
if from_key < to_key:
sql += (
"AND e.ordering > ? AND e.ordering < ? "
"ORDER BY ordering ASC LIMIT %(limit)d "
) % {"limit": limit}
else:
sql += (
"AND e.ordering < ? AND e.ordering > ? "
"ORDER BY ordering DESC LIMIT %(limit)d "
) % {"limit": int(limit)}
rows = yield self._execute_and_decode(
sql,
user_id, user_id, Membership.INVITE, from_key, to_key
)
ret = [self._parse_event_from_row(r) for r in rows]
if rows:
if from_key < to_key:
key = max([r["ordering"] for r in rows])
else:
key = min([r["ordering"] for r in rows])
else:
key = to_key
defer.returnValue((ret, key))
@defer.inlineCallbacks
def get_recent_events_for_room(self, room_id, limit, with_feedback=False):
# TODO (erikj): Handle compressed feedback
sql = (
"SELECT * FROM events WHERE room_id = ? "
"ORDER BY ordering DESC LIMIT ? "
)
rows = yield self._execute_and_decode(
sql,
room_id, limit
)
rows.reverse() # As we selected with reverse ordering
defer.returnValue([self._parse_event_from_row(r) for r in rows])
@defer.inlineCallbacks
def get_room_events_max_id(self):
res = yield self._execute_and_decode(
"SELECT MAX(ordering) as m FROM events"
)
if not res:
defer.returnValue(0)
return
defer.returnValue(res[0]["m"])
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