323 lines
9.7 KiB
Python
323 lines
9.7 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015, 2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer
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import baserules
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import logging
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import simplejson as json
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import re
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from synapse.types import UserID
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from synapse.util.caches.lrucache import LruCache
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logger = logging.getLogger(__name__)
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GLOB_REGEX = re.compile(r'\\\[(\\\!|)(.*)\\\]')
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IS_GLOB = re.compile(r'[\?\*\[\]]')
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INEQUALITY_EXPR = re.compile("^([=<>]*)([0-9]*)$")
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@defer.inlineCallbacks
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def evaluator_for_user_id_and_profile_tag(user_id, profile_tag, room_id, store):
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rawrules = yield store.get_push_rules_for_user(user_id)
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enabled_map = yield store.get_push_rules_enabled_for_user(user_id)
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our_member_event = yield store.get_current_state(
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room_id=room_id,
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event_type='m.room.member',
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state_key=user_id,
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)
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defer.returnValue(PushRuleEvaluator(
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user_id, profile_tag, rawrules, enabled_map,
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room_id, our_member_event, store
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))
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def _room_member_count(ev, condition, room_member_count):
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if 'is' not in condition:
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return False
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m = INEQUALITY_EXPR.match(condition['is'])
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if not m:
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return False
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ineq = m.group(1)
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rhs = m.group(2)
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if not rhs.isdigit():
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return False
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rhs = int(rhs)
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if ineq == '' or ineq == '==':
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return room_member_count == rhs
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elif ineq == '<':
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return room_member_count < rhs
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elif ineq == '>':
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return room_member_count > rhs
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elif ineq == '>=':
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return room_member_count >= rhs
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elif ineq == '<=':
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return room_member_count <= rhs
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else:
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return False
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class PushRuleEvaluator:
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DEFAULT_ACTIONS = []
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def __init__(self, user_id, profile_tag, raw_rules, enabled_map, room_id,
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our_member_event, store):
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self.user_id = user_id
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self.profile_tag = profile_tag
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self.room_id = room_id
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self.our_member_event = our_member_event
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self.store = store
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rules = []
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for raw_rule in raw_rules:
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rule = dict(raw_rule)
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rule['conditions'] = json.loads(raw_rule['conditions'])
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rule['actions'] = json.loads(raw_rule['actions'])
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rules.append(rule)
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self.rules = baserules.list_with_base_rules(rules)
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self.enabled_map = enabled_map
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@staticmethod
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def tweaks_for_actions(actions):
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tweaks = {}
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for a in actions:
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if not isinstance(a, dict):
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continue
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if 'set_tweak' in a and 'value' in a:
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tweaks[a['set_tweak']] = a['value']
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return tweaks
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@defer.inlineCallbacks
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def actions_for_event(self, ev):
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"""
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This should take into account notification settings that the user
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has configured both globally and per-room when we have the ability
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to do such things.
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"""
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if ev['user_id'] == self.user_id:
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# let's assume you probably know about messages you sent yourself
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defer.returnValue([])
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room_id = ev['room_id']
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# get *our* member event for display name matching
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my_display_name = None
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if self.our_member_event:
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my_display_name = self.our_member_event[0].content.get("displayname")
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room_members = yield self.store.get_users_in_room(room_id)
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room_member_count = len(room_members)
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evaluator = PushRuleEvaluatorForEvent(ev, room_member_count)
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for r in self.rules:
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enabled = self.enabled_map.get(r['rule_id'], None)
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if enabled is not None and not enabled:
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continue
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if not r.get("enabled", True):
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continue
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conditions = r['conditions']
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actions = r['actions']
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# ignore rules with no actions (we have an explict 'dont_notify')
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if len(actions) == 0:
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logger.warn(
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"Ignoring rule id %s with no actions for user %s",
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r['rule_id'], self.user_id
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)
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continue
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matches = True
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for c in conditions:
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matches = evaluator.matches(
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c, self.user_id, my_display_name, self.profile_tag
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)
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if not matches:
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break
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logger.debug(
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"Rule %s %s",
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r['rule_id'], "matches" if matches else "doesn't match"
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)
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if matches:
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logger.debug(
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"%s matches for user %s, event %s",
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r['rule_id'], self.user_id, ev['event_id']
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)
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# filter out dont_notify as we treat an empty actions list
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# as dont_notify, and this doesn't take up a row in our database
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actions = [x for x in actions if x != 'dont_notify']
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defer.returnValue(actions)
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logger.debug(
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"No rules match for user %s, event %s",
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self.user_id, ev['event_id']
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)
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defer.returnValue(PushRuleEvaluator.DEFAULT_ACTIONS)
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class PushRuleEvaluatorForEvent(object):
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def __init__(self, event, room_member_count):
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self._event = event
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self._room_member_count = room_member_count
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# Maps strings of e.g. 'content.body' -> event["content"]["body"]
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self._value_cache = _flatten_dict(event)
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def matches(self, condition, user_id, display_name, profile_tag):
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if condition['kind'] == 'event_match':
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return self._event_match(condition, user_id)
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elif condition['kind'] == 'device':
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if 'profile_tag' not in condition:
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return True
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return condition['profile_tag'] == profile_tag
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elif condition['kind'] == 'contains_display_name':
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return self._contains_display_name(display_name)
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elif condition['kind'] == 'room_member_count':
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return _room_member_count(
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self._event, condition, self._room_member_count
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)
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else:
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return True
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def _event_match(self, condition, user_id):
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pattern = condition.get('pattern', None)
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if not pattern:
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pattern_type = condition.get('pattern_type', None)
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if pattern_type == "user_id":
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pattern = user_id
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elif pattern_type == "user_localpart":
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pattern = UserID.from_string(user_id).localpart
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if not pattern:
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logger.warn("event_match condition with no pattern")
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return False
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# XXX: optimisation: cache our pattern regexps
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if condition['key'] == 'content.body':
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body = self._event["content"].get("body", None)
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if not body:
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return False
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return _glob_matches(pattern, body, word_boundary=True)
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else:
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haystack = self._get_value(condition['key'])
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if haystack is None:
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return False
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return _glob_matches(pattern, haystack)
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def _contains_display_name(self, display_name):
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if not display_name:
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return False
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body = self._event["content"].get("body", None)
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if not body:
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return False
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return _glob_matches(display_name, body, word_boundary=True)
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def _get_value(self, dotted_key):
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return self._value_cache.get(dotted_key, None)
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def _glob_matches(glob, value, word_boundary=False):
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"""Tests if value matches glob.
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Args:
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glob (string)
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value (string): String to test against glob.
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word_boundary (bool): Whether to match against word boundaries or entire
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string. Defaults to False.
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Returns:
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bool
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"""
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try:
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if IS_GLOB.search(glob):
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r = re.escape(glob)
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r = r.replace(r'\*', '.*?')
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r = r.replace(r'\?', '.')
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# handle [abc], [a-z] and [!a-z] style ranges.
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r = GLOB_REGEX.sub(
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lambda x: (
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'[%s%s]' % (
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x.group(1) and '^' or '',
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x.group(2).replace(r'\\\-', '-')
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)
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),
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r,
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)
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if word_boundary:
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r = r"\b%s\b" % (r,)
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r = _compile_regex(r)
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return r.search(value)
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else:
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r = r + "$"
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r = _compile_regex(r)
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return r.match(value)
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elif word_boundary:
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r = re.escape(glob)
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r = r"\b%s\b" % (r,)
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r = _compile_regex(r)
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return r.search(value)
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else:
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return value.lower() == glob.lower()
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except re.error:
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logger.warn("Failed to parse glob to regex: %r", glob)
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return False
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def _flatten_dict(d, prefix=[], result={}):
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for key, value in d.items():
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if isinstance(value, basestring):
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result[".".join(prefix + [key])] = value.lower()
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elif hasattr(value, "items"):
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_flatten_dict(value, prefix=(prefix + [key]), result=result)
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return result
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regex_cache = LruCache(5000)
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def _compile_regex(regex_str):
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r = regex_cache.get(regex_str, None)
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if r:
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return r
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r = re.compile(regex_str, flags=re.IGNORECASE)
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regex_cache[regex_str] = r
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return r
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