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-rw-r--r--synapse/handlers/_base.py8
-rw-r--r--synapse/handlers/federation.py10
-rw-r--r--synapse/handlers/sync.py59
-rw-r--r--synapse/push/__init__.py22
-rw-r--r--synapse/push/action_generator.py51
-rw-r--r--synapse/push/bulk_push_rule_evaluator.py107
-rw-r--r--synapse/push/push_rule_evaluator.py22
-rw-r--r--synapse/rest/client/v2_alpha/sync.py1
-rw-r--r--synapse/storage/__init__.py2
-rw-r--r--synapse/storage/event_actions.py98
-rw-r--r--synapse/storage/push_rule.py41
-rw-r--r--synapse/storage/registration.py12
-rw-r--r--synapse/storage/schema/delta/27/event_actions.sql26
13 files changed, 435 insertions, 24 deletions
diff --git a/synapse/handlers/_base.py b/synapse/handlers/_base.py
index 5fd20285d2..24c4c62698 100644
--- a/synapse/handlers/_base.py
+++ b/synapse/handlers/_base.py
@@ -19,9 +19,12 @@ from synapse.api.errors import LimitExceededError, SynapseError, AuthError
 from synapse.crypto.event_signing import add_hashes_and_signatures
 from synapse.api.constants import Membership, EventTypes
 from synapse.types import UserID, RoomAlias
+from synapse.push.action_generator import ActionGenerator
 
 from synapse.util.logcontext import PreserveLoggingContext
 
+from synapse.events.utils import serialize_event
+
 import logging
 
 
@@ -264,6 +267,11 @@ class BaseHandler(object):
             event, context=context
         )
 
+        action_generator = ActionGenerator(self.hs, self.store)
+        yield action_generator.handle_event(serialize_event(
+            event, self.clock.time_msec()
+        ))
+
         destinations = set(extra_destinations)
         for k, s in context.current_state.items():
             try:
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 28f2ff68d6..0b1221deb5 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -32,10 +32,12 @@ from synapse.crypto.event_signing import (
 )
 from synapse.types import UserID
 
-from synapse.events.utils import prune_event
+from synapse.events.utils import prune_event, serialize_event
 
 from synapse.util.retryutils import NotRetryingDestination
 
+from synapse.push.action_generator import ActionGenerator
+
 from twisted.internet import defer
 
 import itertools
@@ -242,6 +244,12 @@ class FederationHandler(BaseHandler):
                     user = UserID.from_string(event.state_key)
                     yield user_joined_room(self.distributor, user, event.room_id)
 
+        if not backfilled and not event.internal_metadata.is_outlier():
+            action_generator = ActionGenerator(self.hs, self.store)
+            yield action_generator.handle_event(serialize_event(
+                event, self.clock.time_msec())
+            )
+
     @defer.inlineCallbacks
     def _filter_events_for_server(self, server_name, room_id, events):
         event_to_state = yield self.store.get_state_for_events(
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index feea407ea2..b1bfdce85b 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -54,6 +54,7 @@ class JoinedSyncResult(collections.namedtuple("JoinedSyncResult", [
     "state",             # dict[(str, str), FrozenEvent]
     "ephemeral",
     "account_data",
+    "unread_notification_count",
 ])):
     __slots__ = []
 
@@ -66,6 +67,8 @@ class JoinedSyncResult(collections.namedtuple("JoinedSyncResult", [
             or self.state
             or self.ephemeral
             or self.account_data
+            # nb the notification count does not, er, count: if there's nothing
+            # else in the result, we don't need to send it.
         )
 
 
@@ -188,6 +191,18 @@ class SyncHandler(BaseHandler):
         else:
             return self.incremental_sync_with_gap(sync_config, since_token)
 
+    def last_read_event_id_for_room_and_user(self, room_id, user_id, ephemeral_by_room):
+        if room_id not in ephemeral_by_room:
+            return None
+        for e in ephemeral_by_room[room_id]:
+            if e['type'] != 'm.receipt':
+                continue
+            for receipt_event_id, val in e['content'].items():
+                if 'm.read' in val:
+                    if user_id in val['m.read']:
+                        return receipt_event_id
+        return None
+
     @defer.inlineCallbacks
     def full_state_sync(self, sync_config, timeline_since_token):
         """Get a sync for a client which is starting without any state.
@@ -314,6 +329,13 @@ class SyncHandler(BaseHandler):
             room_id, sync_config, now_token, since_token=timeline_since_token
         )
 
+        notifs = yield self.unread_notifs_for_room_id(
+            room_id, sync_config, ephemeral_by_room
+        )
+        notif_count = None
+        if notifs is not None:
+            notif_count = len(notifs)
+
         current_state = yield self.get_state_at(room_id, now_token)
 
         defer.returnValue(JoinedSyncResult(
@@ -324,6 +346,7 @@ class SyncHandler(BaseHandler):
             account_data=self.account_data_for_room(
                 room_id, tags_by_room, account_data_by_room
             ),
+            unread_notification_count=notif_count
         ))
 
     def account_data_for_user(self, account_data):
@@ -493,6 +516,17 @@ class SyncHandler(BaseHandler):
         )
         now_token = now_token.copy_and_replace("presence_key", presence_key)
 
+        # We now fetch all ephemeral events for this room in order to get
+        # this users current read receipt. This could almost certainly be
+        # optimised.
+        _, all_ephemeral_by_room = yield self.ephemeral_by_room(
+            sync_config, now_token
+        )
+
+        now_token, ephemeral_by_room = yield self.ephemeral_by_room(
+            sync_config, now_token, since_token
+        )
+
         rm_handler = self.hs.get_handlers().room_member_handler
         app_service = yield self.store.get_app_service_by_user_id(
             sync_config.user.to_string()
@@ -552,6 +586,13 @@ class SyncHandler(BaseHandler):
                 else:
                     prev_batch = now_token
 
+                notifs = yield self.unread_notifs_for_room_id(
+                    room_id, sync_config, all_ephemeral_by_room
+                )
+                notif_count = None
+                if notifs is not None:
+                    notif_count = len(notifs)
+
                 just_joined = yield self.check_joined_room(sync_config, state)
                 if just_joined:
                     logger.debug("User has just joined %s: needs full state",
@@ -572,6 +613,7 @@ class SyncHandler(BaseHandler):
                     account_data=self.account_data_for_room(
                         room_id, tags_by_room, account_data_by_room
                     ),
+                    unread_notification_count=notif_count
                 )
                 logger.debug("Result for room %s: %r", room_id, room_sync)
 
@@ -845,3 +887,20 @@ class SyncHandler(BaseHandler):
             if join_event.content["membership"] == Membership.JOIN:
                 return True
         return False
+
+    @defer.inlineCallbacks
+    def unread_notifs_for_room_id(self, room_id, sync_config, ephemeral_by_room):
+        last_unread_event_id = self.last_read_event_id_for_room_and_user(
+            room_id, sync_config.user.to_string(), ephemeral_by_room
+        )
+
+        notifs = []
+        if last_unread_event_id:
+            notifs = yield self.store.get_unread_event_actions_by_room_for_user(
+                room_id, sync_config.user.to_string(), last_unread_event_id
+            )
+        else:
+            # There is no new information in this period, so your notification
+            # count is whatever it was last time.
+            defer.returnValue(None)
+        defer.returnValue(notifs)
diff --git a/synapse/push/__init__.py b/synapse/push/__init__.py
index e7c964bcd2..635dedd523 100644
--- a/synapse/push/__init__.py
+++ b/synapse/push/__init__.py
@@ -26,7 +26,9 @@ import random
 
 logger = logging.getLogger(__name__)
 
-
+# Pushers could now be moved to pull out of the event_actions table instead
+# of listening on the event stream: this would avoid them having to run the
+# rules again.
 class Pusher(object):
     INITIAL_BACKOFF = 1000
     MAX_BACKOFF = 60 * 60 * 1000
@@ -157,21 +159,7 @@ class Pusher(object):
         actions = yield rule_evaluator.actions_for_event(single_event)
         tweaks = rule_evaluator.tweaks_for_actions(actions)
 
-        if len(actions) == 0:
-            logger.warn("Empty actions! Using default action.")
-            actions = Pusher.DEFAULT_ACTIONS
-
-        if 'notify' not in actions and 'dont_notify' not in actions:
-            logger.warn("Neither notify nor dont_notify in actions: adding default")
-            actions.extend(Pusher.DEFAULT_ACTIONS)
-
-        if 'dont_notify' in actions:
-            logger.debug(
-                "%s for %s: dont_notify",
-                single_event['event_id'], self.user_name
-            )
-            processed = True
-        else:
+        if 'notify' in actions:
             rejected = yield self.dispatch_push(single_event, tweaks)
             self.has_unread = True
             if isinstance(rejected, list) or isinstance(rejected, tuple):
@@ -192,6 +180,8 @@ class Pusher(object):
                         yield self.hs.get_pusherpool().remove_pusher(
                             self.app_id, pk, self.user_name
                         )
+        else:
+            processed = True
 
         if not self.alive:
             return
diff --git a/synapse/push/action_generator.py b/synapse/push/action_generator.py
new file mode 100644
index 0000000000..148b1bda8e
--- /dev/null
+++ b/synapse/push/action_generator.py
@@ -0,0 +1,51 @@
+# -*- 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
+
+import bulk_push_rule_evaluator
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class ActionGenerator:
+    def __init__(self, hs, store):
+        self.hs = hs
+        self.store = store
+        # really we want to get all user ids and all profile tags too,
+        # since we want the actions for each profile tag for every user and
+        # also actions for a client with no profile tag for each user.
+        # Currently the event stream doesn't support profile tags on an
+        # event stream, so we just run the rules for a client with no profile
+        # tag (ie. we just need all the users).
+
+    @defer.inlineCallbacks
+    def handle_event(self, event):
+        users = yield self.store.get_users_in_room(event['room_id'])
+
+        bulk_evaluator = yield bulk_push_rule_evaluator.evaluator_for_room_id(
+            event['room_id'], self.hs, self.store
+        )
+
+        actions_by_user = bulk_evaluator.action_for_event_by_user(event)
+
+        yield self.store.set_actions_for_event_and_users(
+            event,
+            [
+                (uid, None, actions) for uid, actions in actions_by_user.items()
+            ]
+        )
diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
new file mode 100644
index 0000000000..1c0fa72b25
--- /dev/null
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -0,0 +1,107 @@
+# -*- 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.
+
+import logging
+import simplejson as json
+
+from twisted.internet import defer
+
+from synapse.types import UserID
+
+import baserules
+from push_rule_evaluator import PushRuleEvaluator
+
+logger = logging.getLogger(__name__)
+
+
+def decode_rule_json(rule):
+    rule['conditions'] = json.loads(rule['conditions'])
+    rule['actions'] = json.loads(rule['actions'])
+    return rule
+
+
+@defer.inlineCallbacks
+def evaluator_for_room_id(room_id, hs, store):
+    users = yield store.get_users_in_room(room_id)
+    rules_by_user = yield store.bulk_get_push_rules(users)
+    rules_by_user = {
+        uid: baserules.list_with_base_rules(
+            [decode_rule_json(rule_list) for rule_list in rules_by_user[uid]]
+            if uid in rules_by_user else [],
+            UserID.from_string(uid)
+        )
+        for uid in users
+    }
+    member_events = yield store.get_current_state(
+        room_id=room_id,
+        event_type='m.room.member',
+    )
+    display_names = {}
+    for ev in member_events:
+        if ev.content.get("displayname"):
+            display_names[ev.state_key] = ev.content.get("displayname")
+
+    defer.returnValue(BulkPushRuleEvaluator(
+            room_id, rules_by_user, display_names, users
+    ))
+
+
+class BulkPushRuleEvaluator:
+    """
+    Runs push rules for all users in a room.
+    This is faster than running PushRuleEvaluator for each user because it
+    fetches all the rules for all the users in one (batched) db query
+    rarher than doing multiple queries per-user. It currently uses
+    the same logic to run the actual rules, but could be optimised further
+    (see https://matrix.org/jira/browse/SYN-562)
+    """
+    def __init__(self, room_id, rules_by_user, display_names, users_in_room):
+        self.room_id = room_id
+        self.rules_by_user = rules_by_user
+        self.display_names = display_names
+        self.users_in_room = users_in_room
+
+    def action_for_event_by_user(self, event):
+        actions_by_user = {}
+
+        for uid, rules in self.rules_by_user.items():
+            display_name = None
+            if uid in self.display_names:
+                display_name = self.display_names[uid]
+
+            for rule in rules:
+                if 'enabled' in rule and not rule['enabled']:
+                    continue
+
+                # XXX: profile tags
+                if BulkPushRuleEvaluator.event_matches_rule(
+                    event, rule,
+                    display_name, len(self.users_in_room), None
+                ):
+                    actions = [x for x in rule['actions'] if x != 'dont_notify']
+                    if len(actions) > 0:
+                        actions_by_user[uid] = actions
+                    break
+        return actions_by_user
+
+    @staticmethod
+    def event_matches_rule(event, rule,
+                           display_name, room_member_count, profile_tag):
+        matches = True
+        for cond in rule['conditions']:
+            matches &= PushRuleEvaluator._event_fulfills_condition(
+                event, cond, display_name, room_member_count, profile_tag
+            )
+        return matches
\ No newline at end of file
diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index 92c7fd048f..40c7622ec4 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -43,7 +43,7 @@ def evaluator_for_user_name_and_profile_tag(user_name, profile_tag, room_id, sto
 
 
 class PushRuleEvaluator:
-    DEFAULT_ACTIONS = ['dont_notify']
+    DEFAULT_ACTIONS = []
     INEQUALITY_EXPR = re.compile("^([=<>]*)([0-9]*)$")
 
     def __init__(self, user_name, profile_tag, raw_rules, enabled_map, room_id,
@@ -85,7 +85,7 @@ class PushRuleEvaluator:
         """
         if ev['user_id'] == self.user_name:
             # let's assume you probably know about messages you sent yourself
-            defer.returnValue(['dont_notify'])
+            defer.returnValue([])
 
         room_id = ev['room_id']
 
@@ -113,7 +113,8 @@ class PushRuleEvaluator:
             for c in conditions:
                 matches &= self._event_fulfills_condition(
                     ev, c, display_name=my_display_name,
-                    room_member_count=room_member_count
+                    room_member_count=room_member_count,
+                    profile_tag=self.profile_tag
                 )
             logger.debug(
                 "Rule %s %s",
@@ -131,6 +132,11 @@ class PushRuleEvaluator:
                     "%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(
@@ -151,16 +157,18 @@ class PushRuleEvaluator:
                                           re.sub(r'\\\-', '-', x.group(2)))), r)
         return r
 
-    def _event_fulfills_condition(self, ev, condition, display_name, room_member_count):
+    @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' % self._glob_to_regexp(condition['pattern'])
+                r = r'\b%s\b' % PushRuleEvaluator._glob_to_regexp(condition['pattern'])
             else:
-                r = r'^%s$' % self._glob_to_regexp(condition['pattern'])
+                r = r'^%s$' % PushRuleEvaluator._glob_to_regexp(condition['pattern'])
             val = _value_for_dotted_key(condition['key'], ev)
             if val is None:
                 return False
@@ -169,7 +177,7 @@ class PushRuleEvaluator:
         elif condition['kind'] == 'device':
             if 'profile_tag' not in condition:
                 return True
-            return condition['profile_tag'] == self.profile_tag
+            return condition['profile_tag'] == profile_tag
 
         elif condition['kind'] == 'contains_display_name':
             # This is special because display names can be different
diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py
index 35a70ffad1..cd3aef9e07 100644
--- a/synapse/rest/client/v2_alpha/sync.py
+++ b/synapse/rest/client/v2_alpha/sync.py
@@ -311,6 +311,7 @@ class SyncRestServlet(RestServlet):
             },
             "state": {"events": serialized_state},
             "account_data": {"events": account_data},
+            "unread_notification_count": room.unread_notification_count
         }
 
         if joined:
diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index c46b653f11..a112dd237f 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -33,6 +33,7 @@ from .pusher import PusherStore
 from .push_rule import PushRuleStore
 from .media_repository import MediaRepositoryStore
 from .rejections import RejectionsStore
+from .event_actions import EventActionsStore
 
 from .state import StateStore
 from .signatures import SignatureStore
@@ -75,6 +76,7 @@ class DataStore(RoomMemberStore, RoomStore,
                 SearchStore,
                 TagsStore,
                 AccountDataStore,
+                EventActionsStore
                 ):
 
     def __init__(self, hs):
diff --git a/synapse/storage/event_actions.py b/synapse/storage/event_actions.py
new file mode 100644
index 0000000000..3efa445c18
--- /dev/null
+++ b/synapse/storage/event_actions.py
@@ -0,0 +1,98 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014 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 ._base import SQLBaseStore
+from twisted.internet import defer
+
+import logging
+import simplejson as json
+
+logger = logging.getLogger(__name__)
+
+
+class EventActionsStore(SQLBaseStore):
+    @defer.inlineCallbacks
+    def set_actions_for_event_and_users(self, event, tuples):
+        """
+        :param event: the event set actions for
+        :param tuples: list of tuples of (user_id, profile_tag, actions)
+        """
+        values = []
+        for uid, profile_tag, actions in tuples:
+            values.append({
+                'room_id': event['room_id'],
+                'event_id': event['event_id'],
+                'user_id': uid,
+                'profile_tag': profile_tag,
+                'actions': json.dumps(actions)
+            })
+
+        yield self.runInteraction(
+            "set_actions_for_event_and_users",
+            self._simple_insert_many_txn,
+            EventActionsTable.table_name,
+            values
+        )
+
+    @defer.inlineCallbacks
+    def get_unread_event_actions_by_room_for_user(
+            self, room_id, user_id, last_read_event_id
+    ):
+        def _get_unread_event_actions_by_room(txn):
+            sql = (
+                "SELECT stream_ordering, topological_ordering"
+                " FROM events"
+                " WHERE room_id = ? AND event_id = ?"
+            )
+            txn.execute(
+                sql, (room_id, last_read_event_id)
+            )
+            results = txn.fetchall()
+            if len(results) == 0:
+                return []
+
+            stream_ordering = results[0][0]
+            topological_ordering = results[0][1]
+
+            sql = (
+                "SELECT ea.event_id, ea.actions"
+                " FROM event_actions ea, events e"
+                " WHERE ea.room_id = e.room_id"
+                " AND ea.event_id = e.event_id"
+                " AND ea.user_id = ?"
+                " AND ea.room_id = ?"
+                " AND ("
+                "       e.topological_ordering > ?"
+                "       OR (e.topological_ordering == ? AND e.stream_ordering > ?)"
+                ")"
+            )
+            txn.execute(sql, (
+                user_id, room_id,
+                topological_ordering, topological_ordering, stream_ordering
+            )
+            )
+            return [
+                {"event_id": row[0], "actions": row[1]} for row in txn.fetchall()
+            ]
+
+        ret = yield self.runInteraction(
+            "get_unread_event_actions_by_room",
+            _get_unread_event_actions_by_room
+        )
+        defer.returnValue(ret)
+
+
+class EventActionsTable(object):
+    table_name = "event_actions"
diff --git a/synapse/storage/push_rule.py b/synapse/storage/push_rule.py
index 5305b7e122..9dec4aa685 100644
--- a/synapse/storage/push_rule.py
+++ b/synapse/storage/push_rule.py
@@ -56,6 +56,47 @@ class PushRuleStore(SQLBaseStore):
         })
 
     @defer.inlineCallbacks
+    def bulk_get_push_rules(self, user_ids):
+        batch_size = 100
+
+        def f(txn, user_ids_to_fetch):
+            sql = (
+                "SELECT " +
+                ",".join(map(lambda x: "pr."+x, PushRuleTable.fields)) +
+                " FROM " + PushRuleTable.table_name + " pr " +
+                " LEFT JOIN " + PushRuleEnableTable.table_name + " pre " +
+                " ON pr.user_name = pre.user_name and pr.rule_id = pre.rule_id " +
+                " WHERE pr.user_name " +
+                " IN (" + ",".join(["?" for _ in user_ids_to_fetch]) + ")"
+                " AND (pre.enabled is null or pre.enabled = 1)"
+                " ORDER BY pr.user_name, pr.priority_class DESC, pr.priority DESC"
+            )
+            txn.execute(sql, user_ids_to_fetch)
+            return txn.fetchall()
+
+        results = {}
+
+        batch_start = 0
+        while batch_start < len(user_ids):
+            batch_end = max(len(user_ids), batch_size)
+            batch_user_ids = user_ids[batch_start:batch_end]
+            batch_start = batch_end
+
+            rows = yield self.runInteraction(
+                "bulk_get_push_rules", f, batch_user_ids
+            )
+
+            for r in rows:
+                rawdict = {
+                    PushRuleTable.fields[i]: r[i] for i in range(len(r))
+                }
+
+                if rawdict['user_name'] not in results:
+                    results[rawdict['user_name']] = []
+                results[rawdict['user_name']].append(rawdict)
+        defer.returnValue(results)
+
+    @defer.inlineCallbacks
     def add_push_rule(self, before, after, **kwargs):
         vals = kwargs
         if 'conditions' in vals:
diff --git a/synapse/storage/registration.py b/synapse/storage/registration.py
index 09a05b08ef..4676f225b9 100644
--- a/synapse/storage/registration.py
+++ b/synapse/storage/registration.py
@@ -292,6 +292,18 @@ class RegistrationStore(SQLBaseStore):
         defer.returnValue(None)
 
     @defer.inlineCallbacks
+    def get_all_user_ids(self):
+        """Returns all user ids registered on this homeserver"""
+        return self.runInteraction(
+            "get_all_user_ids",
+            self._get_all_user_ids_txn
+        )
+
+    def _get_all_user_ids_txn(self, txn):
+        txn.execute("SELECT name from users")
+        return [r[0] for r in txn.fetchall()]
+
+    @defer.inlineCallbacks
     def count_all_users(self):
         """Counts all users registered on the homeserver."""
         def _count_users(txn):
diff --git a/synapse/storage/schema/delta/27/event_actions.sql b/synapse/storage/schema/delta/27/event_actions.sql
new file mode 100644
index 0000000000..bbdaee990e
--- /dev/null
+++ b/synapse/storage/schema/delta/27/event_actions.sql
@@ -0,0 +1,26 @@
+/* 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.
+ */
+
+CREATE TABLE IF NOT EXISTS event_actions(
+    room_id TEXT NOT NULL,
+    event_id TEXT NOT NULL,
+    user_id TEXT NOT NULL,
+    profile_tag VARCHAR(32),
+    actions TEXT NOT NULL,
+    CONSTRAINT event_id_user_id_profile_tag_uniqueness UNIQUE (room_id, event_id, user_id, profile_tag)
+);
+
+
+CREATE INDEX event_actions_room_id_event_id_user_id_profile_tag on event_actions(room_id, event_id, user_id, profile_tag);