diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
new file mode 100644
index 0000000000..92c7fd048f
--- /dev/null
+++ b/synapse/push/push_rule_evaluator.py
@@ -0,0 +1,224 @@
+# -*- 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 = ['dont_notify']
+ 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(['dont_notify'])
+
+ 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
+ )
+ 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']
+ )
+ 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
+
+ def _event_fulfills_condition(self, ev, condition, display_name, room_member_count):
+ 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' % self._glob_to_regexp(condition['pattern'])
+ else:
+ r = r'^%s$' % self._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'] == self.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
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