1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
# -*- 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.token_ordering > ? AND e.token_ordering < ? "
"ORDER BY token_ordering, rowid ASC LIMIT %(limit)d "
) % {"limit": limit}
else:
sql += (
"AND e.token_ordering < ? "
"AND e.token_ordering > ? "
"ORDER BY e.token_ordering, rowid 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["token_ordering"] for r in rows])
else:
key = min([r["token_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
end_token = yield self.get_room_events_max_id()
sql = (
"SELECT * FROM events WHERE "
"WHERE room_id = ? AND token_ordering <= ? "
"ORDER BY topological_ordering, rowid DESC LIMIT ? "
)
rows = yield self._execute_and_decode(
sql,
room_id, end_token, limit
)
rows.reverse() # As we selected with reverse ordering
if rows:
topo = rows[0]["topological_ordering"]
row_id = rows[0]["rowid"]
start_token = "p%s-%s" % (topo, row_id)
token = (start_token, end_token)
else:
token = ("START", end_token)
defer.returnValue(
(
[self._parse_event_from_row(r) for r in rows],
token
)
)
@defer.inlineCallbacks
def get_room_events_max_id(self):
res = yield self._execute_and_decode(
"SELECT MAX(token_ordering) as m FROM events"
)
if not res:
defer.returnValue(0)
return
defer.returnValue(res[0]["m"])
|
