From fa969cfdde72a2d136eba08eb99e00d47ddb5cdf Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Thu, 5 Oct 2017 12:39:18 +0100
Subject: [PATCH 01/12] Support for channel notifications

Add condition type to check the sender's power level and add a base
rule using it for @channel notifications.
---
 synapse/push/baserules.py                | 23 ++++++++++++++++++++++
 synapse/push/bulk_push_rule_evaluator.py | 19 +++++++++++++++++-
 synapse/push/push_rule_evaluator.py      | 25 +++++++++++++++++-------
 3 files changed, 59 insertions(+), 8 deletions(-)

diff --git a/synapse/push/baserules.py b/synapse/push/baserules.py
index 85effdfa46..354b1f4493 100644
--- a/synapse/push/baserules.py
+++ b/synapse/push/baserules.py
@@ -1,4 +1,5 @@
 # Copyright 2015, 2016 OpenMarket Ltd
+# Copyright 2017 New Vector Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -238,6 +239,28 @@ BASE_APPEND_OVERRIDE_RULES = [
             }
         ]
     },
+    {
+        'rule_id': 'global/underride/.m.rule.channelnotif',
+        'conditions': [
+            {
+                'kind': 'event_match',
+                'key': 'content.body',
+                'pattern': '*@channel*',
+                '_id': '_channelnotif_content',
+            },
+            {
+                'kind': 'sender_power_level',
+                'is': '>=50',
+                '_id': '_channelnotif_pl',
+            },
+        ],
+        'actions': [
+            'notify', {
+                'set_tweak': 'highlight',
+                'value': True,
+            }
+        ]
+    }
 ]
 
 
diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index b0d64aa6c4..6459eec225 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -19,6 +19,7 @@ from twisted.internet import defer
 
 from .push_rule_evaluator import PushRuleEvaluatorForEvent
 
+from synapse.event_auth import get_user_power_level
 from synapse.api.constants import EventTypes, Membership
 from synapse.metrics import get_metrics_for
 from synapse.util.caches import metrics as cache_metrics
@@ -59,6 +60,7 @@ class BulkPushRuleEvaluator(object):
     def __init__(self, hs):
         self.hs = hs
         self.store = hs.get_datastore()
+        self.auth = hs.get_auth()
 
         self.room_push_rule_cache_metrics = cache_metrics.register_cache(
             "cache",
@@ -108,6 +110,17 @@ class BulkPushRuleEvaluator(object):
             self.room_push_rule_cache_metrics,
         )
 
+    @defer.inlineCallbacks
+    def _get_sender_power_level(self, event, context):
+        auth_events_ids = yield self.auth.compute_auth_events(
+            event, context.prev_state_ids, for_verification=False,
+        )
+        auth_events = yield self.store.get_events(auth_events_ids)
+        auth_events = {
+            (e.type, e.state_key): e for e in auth_events.values()
+        }
+        defer.returnValue(get_user_power_level(event.sender, auth_events))
+
     @defer.inlineCallbacks
     def action_for_event_by_user(self, event, context):
         """Given an event and context, evaluate the push rules and return
@@ -123,7 +136,11 @@ class BulkPushRuleEvaluator(object):
             event, context
         )
 
-        evaluator = PushRuleEvaluatorForEvent(event, len(room_members))
+        sender_power_level = yield self._get_sender_power_level(event, context)
+
+        evaluator = PushRuleEvaluatorForEvent(
+            event, len(room_members), sender_power_level
+        )
 
         condition_cache = {}
 
diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index 65f9a63fd8..9cf3f9c632 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 # Copyright 2015, 2016 OpenMarket Ltd
+# Copyright 2015 New Vector Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -29,6 +30,12 @@ INEQUALITY_EXPR = re.compile("^([=<>]*)([0-9]*)$")
 
 
 def _room_member_count(ev, condition, room_member_count):
+    return _test_ineq_condition(condition, room_member_count)
+
+def _sender_power_level(ev, condition, power_level):
+    return _test_ineq_condition(condition, power_level)
+
+def _test_ineq_condition(condition, number):
     if 'is' not in condition:
         return False
     m = INEQUALITY_EXPR.match(condition['is'])
@@ -41,19 +48,18 @@ def _room_member_count(ev, condition, room_member_count):
     rhs = int(rhs)
 
     if ineq == '' or ineq == '==':
-        return room_member_count == rhs
+        return number == rhs
     elif ineq == '<':
-        return room_member_count < rhs
+        return number < rhs
     elif ineq == '>':
-        return room_member_count > rhs
+        return number > rhs
     elif ineq == '>=':
-        return room_member_count >= rhs
+        return number >= rhs
     elif ineq == '<=':
-        return room_member_count <= rhs
+        return number <= rhs
     else:
         return False
 
-
 def tweaks_for_actions(actions):
     tweaks = {}
     for a in actions:
@@ -65,9 +71,10 @@ def tweaks_for_actions(actions):
 
 
 class PushRuleEvaluatorForEvent(object):
-    def __init__(self, event, room_member_count):
+    def __init__(self, event, room_member_count, sender_power_level):
         self._event = event
         self._room_member_count = room_member_count
+        self._sender_power_level = sender_power_level
 
         # Maps strings of e.g. 'content.body' -> event["content"]["body"]
         self._value_cache = _flatten_dict(event)
@@ -81,6 +88,10 @@ class PushRuleEvaluatorForEvent(object):
             return _room_member_count(
                 self._event, condition, self._room_member_count
             )
+        elif condition['kind'] == 'sender_power_level':
+            return _sender_power_level(
+                self._event, condition, self._sender_power_level
+            )
         else:
             return True
 

From b9b9714fd5c3fa4c209d3ca1f6ddde365373ec98 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Thu, 5 Oct 2017 13:02:19 +0100
Subject: [PATCH 02/12] Get rule type right

---
 synapse/push/baserules.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/synapse/push/baserules.py b/synapse/push/baserules.py
index 354b1f4493..3b290a22a1 100644
--- a/synapse/push/baserules.py
+++ b/synapse/push/baserules.py
@@ -240,7 +240,7 @@ BASE_APPEND_OVERRIDE_RULES = [
         ]
     },
     {
-        'rule_id': 'global/underride/.m.rule.channelnotif',
+        'rule_id': 'global/override/.m.rule.channelnotif',
         'conditions': [
             {
                 'kind': 'event_match',

From 985ce80375b601d500ae58faa032874a794e942a Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Thu, 5 Oct 2017 13:03:44 +0100
Subject: [PATCH 03/12] They're called rooms

---
 synapse/push/baserules.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/synapse/push/baserules.py b/synapse/push/baserules.py
index 3b290a22a1..71f9ab6b25 100644
--- a/synapse/push/baserules.py
+++ b/synapse/push/baserules.py
@@ -240,18 +240,18 @@ BASE_APPEND_OVERRIDE_RULES = [
         ]
     },
     {
-        'rule_id': 'global/override/.m.rule.channelnotif',
+        'rule_id': 'global/override/.m.rule.roomnotif',
         'conditions': [
             {
                 'kind': 'event_match',
                 'key': 'content.body',
-                'pattern': '*@channel*',
-                '_id': '_channelnotif_content',
+                'pattern': '*@room*',
+                '_id': '_roomnotif_content',
             },
             {
                 'kind': 'sender_power_level',
                 'is': '>=50',
-                '_id': '_channelnotif_pl',
+                '_id': '_roomnotif_pl',
             },
         ],
         'actions': [

From e433393c4fded875cc38b09b02b453b7a014a9af Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Thu, 5 Oct 2017 13:08:02 +0100
Subject: [PATCH 04/12] pep8

---
 synapse/push/push_rule_evaluator.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index 9cf3f9c632..a91dc0ee08 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -32,9 +32,11 @@ INEQUALITY_EXPR = re.compile("^([=<>]*)([0-9]*)$")
 def _room_member_count(ev, condition, room_member_count):
     return _test_ineq_condition(condition, room_member_count)
 
+
 def _sender_power_level(ev, condition, power_level):
     return _test_ineq_condition(condition, power_level)
 
+
 def _test_ineq_condition(condition, number):
     if 'is' not in condition:
         return False
@@ -60,6 +62,7 @@ def _test_ineq_condition(condition, number):
     else:
         return False
 
+
 def tweaks_for_actions(actions):
     tweaks = {}
     for a in actions:

From ed80c6b6cc6da27849038a1b83bec7fa1ac54b3e Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Thu, 5 Oct 2017 13:20:22 +0100
Subject: [PATCH 05/12] Add fastpath optimisation

---
 synapse/push/bulk_push_rule_evaluator.py | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index 6459eec225..ca3b5af807 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -112,9 +112,15 @@ class BulkPushRuleEvaluator(object):
 
     @defer.inlineCallbacks
     def _get_sender_power_level(self, event, context):
-        auth_events_ids = yield self.auth.compute_auth_events(
-            event, context.prev_state_ids, for_verification=False,
-        )
+        pl_event_key = (EventTypes.PowerLevels, "", )
+        if pl_event_key in context.prev_state_ids:
+            # fastpath: if there's a power level event, that's all we need, and
+            # not having a power level event is an extreme edge case
+            auth_events_ids = [context.prev_state_ids[pl_event_key]]
+        else:
+            auth_events_ids = yield self.auth.compute_auth_events(
+                event, context.prev_state_ids, for_verification=False,
+            )
         auth_events = yield self.store.get_events(auth_events_ids)
         auth_events = {
             (e.type, e.state_key): e for e in auth_events.values()

From 269af961e9910e254f5abc979f0bd293687414f3 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Thu, 5 Oct 2017 13:27:12 +0100
Subject: [PATCH 06/12] Make be faster

---
 synapse/push/bulk_push_rule_evaluator.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index ca3b5af807..df16d5ce9e 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -112,11 +112,11 @@ class BulkPushRuleEvaluator(object):
 
     @defer.inlineCallbacks
     def _get_sender_power_level(self, event, context):
-        pl_event_key = (EventTypes.PowerLevels, "", )
-        if pl_event_key in context.prev_state_ids:
+        pl_event_id = context.prev_state_ids.get((EventTypes.PowerLevels, "",))
+        if pl_event_id:
             # fastpath: if there's a power level event, that's all we need, and
             # not having a power level event is an extreme edge case
-            auth_events_ids = [context.prev_state_ids[pl_event_key]]
+            auth_events_ids = [pl_event_id]
         else:
             auth_events_ids = yield self.auth.compute_auth_events(
                 event, context.prev_state_ids, for_verification=False,

From 707374d5dc8ed0ed077ed525262678ebcd583090 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Tue, 10 Oct 2017 11:21:41 +0100
Subject: [PATCH 07/12] What year is it!? Who's the president!?

---
 synapse/push/push_rule_evaluator.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index a91dc0ee08..7cf777f16f 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Copyright 2015, 2016 OpenMarket Ltd
-# Copyright 2015 New Vector Ltd
+# Copyright 2017 New Vector Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

From a9f9d686316da9efa3e165275fb20066c0367649 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Tue, 10 Oct 2017 11:38:31 +0100
Subject: [PATCH 08/12] More optimisation

---
 synapse/push/bulk_push_rule_evaluator.py | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index df16d5ce9e..66e8a68a05 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -112,19 +112,22 @@ class BulkPushRuleEvaluator(object):
 
     @defer.inlineCallbacks
     def _get_sender_power_level(self, event, context):
-        pl_event_id = context.prev_state_ids.get((EventTypes.PowerLevels, "",))
+        pl_event_key = (EventTypes.PowerLevels, "", )
+        pl_event_id = context.prev_state_ids.get(pl_event_key)
         if pl_event_id:
             # fastpath: if there's a power level event, that's all we need, and
             # not having a power level event is an extreme edge case
-            auth_events_ids = [pl_event_id]
+            pl_event = yield self.store.get_event(pl_event_id)
+            auth_events = { pl_event_key: pl_event }
         else:
             auth_events_ids = yield self.auth.compute_auth_events(
                 event, context.prev_state_ids, for_verification=False,
             )
-        auth_events = yield self.store.get_events(auth_events_ids)
-        auth_events = {
-            (e.type, e.state_key): e for e in auth_events.values()
-        }
+            auth_events = yield self.store.get_events(auth_events_ids)
+            auth_events = {
+                (e.type, e.state_key): e for e in auth_events.itervalues()
+            }
+
         defer.returnValue(get_user_power_level(event.sender, auth_events))
 
     @defer.inlineCallbacks

From c9f034b4acb0a48915d1680e310b692816eed713 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Tue, 10 Oct 2017 11:47:10 +0100
Subject: [PATCH 09/12] There was already a constant for this

also update copyright
---
 synapse/push/bulk_push_rule_evaluator.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index 66e8a68a05..adc99bd4f6 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 # Copyright 2015 OpenMarket Ltd
+# Copyright 2017 New Vector Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -25,6 +26,7 @@ from synapse.metrics import get_metrics_for
 from synapse.util.caches import metrics as cache_metrics
 from synapse.util.caches.descriptors import cached
 from synapse.util.async import Linearizer
+from synapse.state import POWER_KEY
 
 from collections import namedtuple
 
@@ -112,13 +114,12 @@ class BulkPushRuleEvaluator(object):
 
     @defer.inlineCallbacks
     def _get_sender_power_level(self, event, context):
-        pl_event_key = (EventTypes.PowerLevels, "", )
-        pl_event_id = context.prev_state_ids.get(pl_event_key)
+        pl_event_id = context.prev_state_ids.get(POWER_KEY)
         if pl_event_id:
             # fastpath: if there's a power level event, that's all we need, and
             # not having a power level event is an extreme edge case
             pl_event = yield self.store.get_event(pl_event_id)
-            auth_events = { pl_event_key: pl_event }
+            auth_events = { POWER_KEY: pl_event }
         else:
             auth_events_ids = yield self.auth.compute_auth_events(
                 event, context.prev_state_ids, for_verification=False,

From 0f1eb3e914a1e47e441bd8bfb7d523882646fb6e Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Tue, 10 Oct 2017 15:23:00 +0100
Subject: [PATCH 10/12] Use notification levels in power_levels

Rather than making the condition directly require a specific power
level. This way the level require to notify a room can be configured
per room.
---
 synapse/push/baserules.py                |  4 ++--
 synapse/push/bulk_push_rule_evaluator.py | 10 ++++++----
 synapse/push/push_rule_evaluator.py      | 20 ++++++++++++++------
 3 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/synapse/push/baserules.py b/synapse/push/baserules.py
index 71f9ab6b25..9dce99ebec 100644
--- a/synapse/push/baserules.py
+++ b/synapse/push/baserules.py
@@ -249,8 +249,8 @@ BASE_APPEND_OVERRIDE_RULES = [
                 '_id': '_roomnotif_content',
             },
             {
-                'kind': 'sender_power_level',
-                'is': '>=50',
+                'kind': 'sender_notification_permission',
+                'key': 'room',
                 '_id': '_roomnotif_pl',
             },
         ],
diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index adc99bd4f6..db07a97a94 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -113,7 +113,7 @@ class BulkPushRuleEvaluator(object):
         )
 
     @defer.inlineCallbacks
-    def _get_sender_power_level(self, event, context):
+    def _get_power_levels_and_sender_level(self, event, context):
         pl_event_id = context.prev_state_ids.get(POWER_KEY)
         if pl_event_id:
             # fastpath: if there's a power level event, that's all we need, and
@@ -129,7 +129,9 @@ class BulkPushRuleEvaluator(object):
                 (e.type, e.state_key): e for e in auth_events.itervalues()
             }
 
-        defer.returnValue(get_user_power_level(event.sender, auth_events))
+        sender_level = get_user_power_level(event.sender, auth_events)
+
+        defer.returnValue((auth_events[POWER_KEY].content, sender_level))
 
     @defer.inlineCallbacks
     def action_for_event_by_user(self, event, context):
@@ -146,10 +148,10 @@ class BulkPushRuleEvaluator(object):
             event, context
         )
 
-        sender_power_level = yield self._get_sender_power_level(event, context)
+        (power_levels, sender_power_level) = yield self._get_power_levels_and_sender_level(event, context)
 
         evaluator = PushRuleEvaluatorForEvent(
-            event, len(room_members), sender_power_level
+            event, len(room_members), sender_power_level, power_levels,
         )
 
         condition_cache = {}
diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index 7cf777f16f..5011bef4f1 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -33,8 +33,15 @@ def _room_member_count(ev, condition, room_member_count):
     return _test_ineq_condition(condition, room_member_count)
 
 
-def _sender_power_level(ev, condition, power_level):
-    return _test_ineq_condition(condition, power_level)
+def _sender_notification_permission(ev, condition, sender_power_level, power_levels):
+    notif_level_key = condition.get('key')
+    if notif_level_key is None:
+        return False
+
+    notif_levels = power_levels.get('notifications', {})
+    room_notif_level = notif_levels.get(notif_level_key, 50)
+
+    return sender_power_level >= room_notif_level;
 
 
 def _test_ineq_condition(condition, number):
@@ -74,10 +81,11 @@ def tweaks_for_actions(actions):
 
 
 class PushRuleEvaluatorForEvent(object):
-    def __init__(self, event, room_member_count, sender_power_level):
+    def __init__(self, event, room_member_count, sender_power_level, power_levels):
         self._event = event
         self._room_member_count = room_member_count
         self._sender_power_level = sender_power_level
+        self._power_levels = power_levels
 
         # Maps strings of e.g. 'content.body' -> event["content"]["body"]
         self._value_cache = _flatten_dict(event)
@@ -91,9 +99,9 @@ class PushRuleEvaluatorForEvent(object):
             return _room_member_count(
                 self._event, condition, self._room_member_count
             )
-        elif condition['kind'] == 'sender_power_level':
-            return _sender_power_level(
-                self._event, condition, self._sender_power_level
+        elif condition['kind'] == 'sender_notification_permission':
+            return _sender_notification_permission(
+                self._event, condition, self._sender_power_level, self._power_levels,
             )
         else:
             return True

From ab1bc9bf5fcc8875c61e4ec7357d6e43abc76a55 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Tue, 10 Oct 2017 15:34:05 +0100
Subject: [PATCH 11/12] Don't KeyError if no power_levels event

---
 synapse/push/bulk_push_rule_evaluator.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index db07a97a94..05c1c5165f 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -131,7 +131,9 @@ class BulkPushRuleEvaluator(object):
 
         sender_level = get_user_power_level(event.sender, auth_events)
 
-        defer.returnValue((auth_events[POWER_KEY].content, sender_level))
+        pl_event = auth_events.get(POWER_KEY)
+
+        defer.returnValue((pl_event.content if pl_event else {}, sender_level))
 
     @defer.inlineCallbacks
     def action_for_event_by_user(self, event, context):

From 81a5e0073cbca1ed469fdae94150de3059e5c3e3 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Tue, 10 Oct 2017 15:53:34 +0100
Subject: [PATCH 12/12] pep8

---
 synapse/push/bulk_push_rule_evaluator.py | 6 ++++--
 synapse/push/push_rule_evaluator.py      | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index 05c1c5165f..425a017bdf 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -119,7 +119,7 @@ class BulkPushRuleEvaluator(object):
             # fastpath: if there's a power level event, that's all we need, and
             # not having a power level event is an extreme edge case
             pl_event = yield self.store.get_event(pl_event_id)
-            auth_events = { POWER_KEY: pl_event }
+            auth_events = {POWER_KEY: pl_event}
         else:
             auth_events_ids = yield self.auth.compute_auth_events(
                 event, context.prev_state_ids, for_verification=False,
@@ -150,7 +150,9 @@ class BulkPushRuleEvaluator(object):
             event, context
         )
 
-        (power_levels, sender_power_level) = yield self._get_power_levels_and_sender_level(event, context)
+        (power_levels, sender_power_level) = (
+            yield self._get_power_levels_and_sender_level(event, context)
+        )
 
         evaluator = PushRuleEvaluatorForEvent(
             event, len(room_members), sender_power_level, power_levels,
diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index 5011bef4f1..3601f2d365 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -41,7 +41,7 @@ def _sender_notification_permission(ev, condition, sender_power_level, power_lev
     notif_levels = power_levels.get('notifications', {})
     room_notif_level = notif_levels.get(notif_level_key, 50)
 
-    return sender_power_level >= room_notif_level;
+    return sender_power_level >= room_notif_level
 
 
 def _test_ineq_condition(condition, number):