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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
# -*- coding: utf-8 -*-
# Copyright 2015 OpenMarket Ltd
#
# 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 synapse.types import UserID
import baserules
import logging
import simplejson as json
import re
logger = logging.getLogger(__name__)
@defer.inlineCallbacks
def evaluator_for_user_name_and_profile_tag(user_name, profile_tag, room_id, store):
rawrules = yield store.get_push_rules_for_user(user_name)
enabled_map = yield store.get_push_rules_enabled_for_user(user_name)
our_member_event = yield store.get_current_state(
room_id=room_id,
event_type='m.room.member',
state_key=user_name,
)
defer.returnValue(PushRuleEvaluator(
user_name, profile_tag, rawrules, enabled_map,
room_id, our_member_event, store
))
class PushRuleEvaluator:
DEFAULT_ACTIONS = []
INEQUALITY_EXPR = re.compile("^([=<>]*)([0-9]*)$")
def __init__(self, user_name, profile_tag, raw_rules, enabled_map, room_id,
our_member_event, store):
self.user_name = user_name
self.profile_tag = profile_tag
self.room_id = room_id
self.our_member_event = our_member_event
self.store = store
rules = []
for raw_rule in raw_rules:
rule = dict(raw_rule)
rule['conditions'] = json.loads(raw_rule['conditions'])
rule['actions'] = json.loads(raw_rule['actions'])
rules.append(rule)
user = UserID.from_string(self.user_name)
self.rules = baserules.list_with_base_rules(rules, user)
self.enabled_map = enabled_map
@staticmethod
def tweaks_for_actions(actions):
tweaks = {}
for a in actions:
if not isinstance(a, dict):
continue
if 'set_tweak' in a and 'value' in a:
tweaks[a['set_tweak']] = a['value']
return tweaks
@defer.inlineCallbacks
def actions_for_event(self, ev):
"""
This should take into account notification settings that the user
has configured both globally and per-room when we have the ability
to do such things.
"""
if ev['user_id'] == self.user_name:
# let's assume you probably know about messages you sent yourself
defer.returnValue([])
room_id = ev['room_id']
# get *our* member event for display name matching
my_display_name = None
if self.our_member_event:
my_display_name = self.our_member_event[0].content.get("displayname")
room_members = yield self.store.get_users_in_room(room_id)
room_member_count = len(room_members)
for r in self.rules:
if r['rule_id'] in self.enabled_map:
r['enabled'] = self.enabled_map[r['rule_id']]
elif 'enabled' not in r:
r['enabled'] = True
if not r['enabled']:
continue
matches = True
conditions = r['conditions']
actions = r['actions']
for c in conditions:
matches &= self._event_fulfills_condition(
ev, c, display_name=my_display_name,
room_member_count=room_member_count,
profile_tag=self.profile_tag
)
logger.debug(
"Rule %s %s",
r['rule_id'], "matches" if matches else "doesn't match"
)
# ignore rules with no actions (we have an explict 'dont_notify')
if len(actions) == 0:
logger.warn(
"Ignoring rule id %s with no actions for user %s",
r['rule_id'], self.user_name
)
continue
if matches:
logger.info(
"%s matches for user %s, event %s",
r['rule_id'], self.user_name, ev['event_id']
)
# filter out dont_notify as we treat an empty actions list
# as dont_notify, and this doesn't take up a row in our database
actions = [x for x in actions if x != 'dont_notify']
defer.returnValue(actions)
logger.info(
"No rules match for user %s, event %s",
self.user_name, ev['event_id']
)
defer.returnValue(PushRuleEvaluator.DEFAULT_ACTIONS)
@staticmethod
def _glob_to_regexp(glob):
r = re.escape(glob)
r = re.sub(r'\\\*', r'.*?', r)
r = re.sub(r'\\\?', r'.', r)
# handle [abc], [a-z] and [!a-z] style ranges.
r = re.sub(r'\\\[(\\\!|)(.*)\\\]',
lambda x: ('[%s%s]' % (x.group(1) and '^' or '',
re.sub(r'\\\-', '-', x.group(2)))), r)
return r
@staticmethod
def _event_fulfills_condition(ev, condition,
display_name, room_member_count, profile_tag):
if condition['kind'] == 'event_match':
if 'pattern' not in condition:
logger.warn("event_match condition with no pattern")
return False
# XXX: optimisation: cache our pattern regexps
if condition['key'] == 'content.body':
r = r'\b%s\b' % PushRuleEvaluator._glob_to_regexp(condition['pattern'])
else:
r = r'^%s$' % PushRuleEvaluator._glob_to_regexp(condition['pattern'])
val = _value_for_dotted_key(condition['key'], ev)
if val is None:
return False
return re.search(r, val, flags=re.IGNORECASE) is not None
elif condition['kind'] == 'device':
if 'profile_tag' not in condition:
return True
return condition['profile_tag'] == profile_tag
elif condition['kind'] == 'contains_display_name':
# This is special because display names can be different
# between rooms and so you can't really hard code it in a rule.
# Optimisation: we should cache these names and update them from
# the event stream.
if 'content' not in ev or 'body' not in ev['content']:
return False
if not display_name:
return False
return re.search(
r"\b%s\b" % re.escape(display_name), ev['content']['body'],
flags=re.IGNORECASE
) is not None
elif condition['kind'] == 'room_member_count':
if 'is' not in condition:
return False
m = PushRuleEvaluator.INEQUALITY_EXPR.match(condition['is'])
if not m:
return False
ineq = m.group(1)
rhs = m.group(2)
if not rhs.isdigit():
return False
rhs = int(rhs)
if ineq == '' or ineq == '==':
return room_member_count == rhs
elif ineq == '<':
return room_member_count < rhs
elif ineq == '>':
return room_member_count > rhs
elif ineq == '>=':
return room_member_count >= rhs
elif ineq == '<=':
return room_member_count <= rhs
else:
return False
else:
return True
def _value_for_dotted_key(dotted_key, event):
parts = dotted_key.split(".")
val = event
while len(parts) > 0:
if parts[0] not in val:
return None
val = val[parts[0]]
parts = parts[1:]
return val
|
