225 lines
7.6 KiB
Python
225 lines
7.6 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015 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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from synapse.types import UserID
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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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logger = logging.getLogger(__name__)
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@defer.inlineCallbacks
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def evaluator_for_user_name_and_profile_tag(user_name, profile_tag, room_id, store):
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rawrules = yield store.get_push_rules_for_user(user_name)
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enabled_map = yield store.get_push_rules_enabled_for_user(user_name)
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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_name,
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)
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defer.returnValue(PushRuleEvaluator(
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user_name, profile_tag, rawrules, enabled_map,
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room_id, our_member_event, store
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))
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class PushRuleEvaluator:
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DEFAULT_ACTIONS = ['dont_notify']
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INEQUALITY_EXPR = re.compile("^([=<>]*)([0-9]*)$")
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def __init__(self, user_name, profile_tag, raw_rules, enabled_map, room_id,
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our_member_event, store):
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self.user_name = user_name
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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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user = UserID.from_string(self.user_name)
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self.rules = baserules.list_with_base_rules(rules, user)
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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_name:
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# let's assume you probably know about messages you sent yourself
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defer.returnValue(['dont_notify'])
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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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for r in self.rules:
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if r['rule_id'] in self.enabled_map:
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r['enabled'] = self.enabled_map[r['rule_id']]
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elif 'enabled' not in r:
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r['enabled'] = True
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if not r['enabled']:
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continue
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matches = True
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conditions = r['conditions']
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actions = r['actions']
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for c in conditions:
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matches &= self._event_fulfills_condition(
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ev, c, display_name=my_display_name,
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room_member_count=room_member_count
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)
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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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# 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_name
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)
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continue
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if matches:
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logger.info(
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"%s matches for user %s, event %s",
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r['rule_id'], self.user_name, ev['event_id']
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)
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defer.returnValue(actions)
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logger.info(
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"No rules match for user %s, event %s",
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self.user_name, ev['event_id']
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)
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defer.returnValue(PushRuleEvaluator.DEFAULT_ACTIONS)
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@staticmethod
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def _glob_to_regexp(glob):
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r = re.escape(glob)
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r = re.sub(r'\\\*', r'.*?', r)
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r = re.sub(r'\\\?', r'.', r)
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# handle [abc], [a-z] and [!a-z] style ranges.
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r = re.sub(r'\\\[(\\\!|)(.*)\\\]',
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lambda x: ('[%s%s]' % (x.group(1) and '^' or '',
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re.sub(r'\\\-', '-', x.group(2)))), r)
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return r
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def _event_fulfills_condition(self, ev, condition, display_name, room_member_count):
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if condition['kind'] == 'event_match':
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if 'pattern' not in condition:
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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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r = r'\b%s\b' % self._glob_to_regexp(condition['pattern'])
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else:
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r = r'^%s$' % self._glob_to_regexp(condition['pattern'])
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val = _value_for_dotted_key(condition['key'], ev)
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if val is None:
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return False
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return re.search(r, val, flags=re.IGNORECASE) is not None
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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'] == self.profile_tag
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elif condition['kind'] == 'contains_display_name':
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# This is special because display names can be different
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# between rooms and so you can't really hard code it in a rule.
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# Optimisation: we should cache these names and update them from
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# the event stream.
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if 'content' not in ev or 'body' not in ev['content']:
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return False
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if not display_name:
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return False
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return re.search(
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r"\b%s\b" % re.escape(display_name), ev['content']['body'],
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flags=re.IGNORECASE
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) is not None
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elif condition['kind'] == 'room_member_count':
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if 'is' not in condition:
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return False
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m = PushRuleEvaluator.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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else:
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return True
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def _value_for_dotted_key(dotted_key, event):
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parts = dotted_key.split(".")
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val = event
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while len(parts) > 0:
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if parts[0] not in val:
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return None
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val = val[parts[0]]
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parts = parts[1:]
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return val
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