anonymousland-synapse/synapse/storage/push_rule.py

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# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2018 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.
# 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.
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import abc
import logging
from canonicaljson import json
from twisted.internet import defer
from synapse.push.baserules import list_with_base_rules
from synapse.storage.appservice import ApplicationServiceWorkerStore
from synapse.storage.pusher import PusherWorkerStore
from synapse.storage.receipts import ReceiptsWorkerStore
from synapse.storage.roommember import RoomMemberWorkerStore
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from synapse.util.caches.descriptors import cachedInlineCallbacks, cachedList
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from synapse.util.caches.stream_change_cache import StreamChangeCache
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from ._base import SQLBaseStore
logger = logging.getLogger(__name__)
def _load_rules(rawrules, enabled_map):
ruleslist = []
for rawrule in rawrules:
rule = dict(rawrule)
rule["conditions"] = json.loads(rawrule["conditions"])
rule["actions"] = json.loads(rawrule["actions"])
ruleslist.append(rule)
# We're going to be mutating this a lot, so do a deep copy
rules = list(list_with_base_rules(ruleslist))
for i, rule in enumerate(rules):
rule_id = rule['rule_id']
if rule_id in enabled_map:
if rule.get('enabled', True) != bool(enabled_map[rule_id]):
# Rules are cached across users.
rule = dict(rule)
rule['enabled'] = bool(enabled_map[rule_id])
rules[i] = rule
return rules
class PushRulesWorkerStore(ApplicationServiceWorkerStore,
ReceiptsWorkerStore,
PusherWorkerStore,
RoomMemberWorkerStore,
SQLBaseStore):
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"""This is an abstract base class where subclasses must implement
`get_max_push_rules_stream_id` which can be called in the initializer.
"""
# This ABCMeta metaclass ensures that we cannot be instantiated without
# the abstract methods being implemented.
__metaclass__ = abc.ABCMeta
def __init__(self, db_conn, hs):
super(PushRulesWorkerStore, self).__init__(db_conn, hs)
push_rules_prefill, push_rules_id = self._get_cache_dict(
db_conn, "push_rules_stream",
entity_column="user_id",
stream_column="stream_id",
max_value=self.get_max_push_rules_stream_id(),
)
self.push_rules_stream_cache = StreamChangeCache(
"PushRulesStreamChangeCache", push_rules_id,
prefilled_cache=push_rules_prefill,
)
@abc.abstractmethod
def get_max_push_rules_stream_id(self):
"""Get the position of the push rules stream.
Returns:
int
"""
raise NotImplementedError()
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@cachedInlineCallbacks(max_entries=5000)
def get_push_rules_for_user(self, user_id):
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rows = yield self._simple_select_list(
table="push_rules",
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keyvalues={
"user_name": user_id,
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},
retcols=(
"user_name", "rule_id", "priority_class", "priority",
"conditions", "actions",
),
desc="get_push_rules_enabled_for_user",
)
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rows.sort(
key=lambda row: (-int(row["priority_class"]), -int(row["priority"]))
)
enabled_map = yield self.get_push_rules_enabled_for_user(user_id)
rules = _load_rules(rows, enabled_map)
defer.returnValue(rules)
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@cachedInlineCallbacks(max_entries=5000)
def get_push_rules_enabled_for_user(self, user_id):
results = yield self._simple_select_list(
table="push_rules_enable",
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keyvalues={
'user_name': user_id
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},
retcols=(
"user_name", "rule_id", "enabled",
),
desc="get_push_rules_enabled_for_user",
)
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defer.returnValue({
r['rule_id']: False if r['enabled'] == 0 else True for r in results
})
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def have_push_rules_changed_for_user(self, user_id, last_id):
if not self.push_rules_stream_cache.has_entity_changed(user_id, last_id):
return defer.succeed(False)
else:
def have_push_rules_changed_txn(txn):
sql = (
"SELECT COUNT(stream_id) FROM push_rules_stream"
" WHERE user_id = ? AND ? < stream_id"
)
txn.execute(sql, (user_id, last_id))
count, = txn.fetchone()
return bool(count)
return self.runInteraction(
"have_push_rules_changed", have_push_rules_changed_txn
)
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@cachedList(cached_method_name="get_push_rules_for_user",
list_name="user_ids", num_args=1, inlineCallbacks=True)
def bulk_get_push_rules(self, user_ids):
if not user_ids:
defer.returnValue({})
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results = {
user_id: []
for user_id in user_ids
}
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rows = yield self._simple_select_many_batch(
table="push_rules",
column="user_name",
iterable=user_ids,
retcols=("*",),
desc="bulk_get_push_rules",
)
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rows.sort(
key=lambda row: (-int(row["priority_class"]), -int(row["priority"]))
)
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for row in rows:
results.setdefault(row['user_name'], []).append(row)
enabled_map_by_user = yield self.bulk_get_push_rules_enabled(user_ids)
for user_id, rules in results.items():
results[user_id] = _load_rules(
rules, enabled_map_by_user.get(user_id, {})
)
defer.returnValue(results)
@defer.inlineCallbacks
def move_push_rule_from_room_to_room(
self, new_room_id, user_id, rule,
):
"""Move a single push rule from one room to another for a specific user.
Args:
new_room_id (str): ID of the new room.
user_id (str): ID of user the push rule belongs to.
rule (Dict): A push rule.
"""
# Create new rule id
rule_id_scope = '/'.join(rule["rule_id"].split('/')[:-1])
new_rule_id = rule_id_scope + "/" + new_room_id
# Change room id in each condition
for condition in rule.get("conditions", []):
if condition.get("key") == "room_id":
condition["pattern"] = new_room_id
# Add the rule for the new room
yield self.add_push_rule(
user_id=user_id,
rule_id=new_rule_id,
priority_class=rule["priority_class"],
conditions=rule["conditions"],
actions=rule["actions"],
)
# Delete push rule for the old room
yield self.delete_push_rule(user_id, rule["rule_id"])
@defer.inlineCallbacks
def move_push_rules_from_room_to_room_for_user(
self, old_room_id, new_room_id, user_id,
):
"""Move all of the push rules from one room to another for a specific
user.
Args:
old_room_id (str): ID of the old room.
new_room_id (str): ID of the new room.
user_id (str): ID of user to copy push rules for.
"""
# Retrieve push rules for this user
user_push_rules = yield self.get_push_rules_for_user(user_id)
# Get rules relating to the old room, move them to the new room, then
# delete them from the old room
for rule in user_push_rules:
conditions = rule.get("conditions", [])
if any((c.get("key") == "room_id" and
c.get("pattern") == old_room_id) for c in conditions):
self.move_push_rule_from_room_to_room(
new_room_id, user_id, rule,
)
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@defer.inlineCallbacks
def bulk_get_push_rules_for_room(self, event, context):
state_group = context.state_group
if not state_group:
# If state_group is None it means it has yet to be assigned a
# state group, i.e. we need to make sure that calls with a state_group
# of None don't hit previous cached calls with a None state_group.
# To do this we set the state_group to a new object as object() != object()
state_group = object()
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current_state_ids = yield context.get_current_state_ids(self)
result = yield self._bulk_get_push_rules_for_room(
event.room_id, state_group, current_state_ids, event=event
)
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defer.returnValue(result)
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@cachedInlineCallbacks(num_args=2, cache_context=True)
def _bulk_get_push_rules_for_room(self, room_id, state_group, current_state_ids,
cache_context, event=None):
# We don't use `state_group`, its there so that we can cache based
# on it. However, its important that its never None, since two current_state's
# with a state_group of None are likely to be different.
# See bulk_get_push_rules_for_room for how we work around this.
assert state_group is not None
# We also will want to generate notifs for other people in the room so
# their unread countss are correct in the event stream, but to avoid
# generating them for bot / AS users etc, we only do so for people who've
# sent a read receipt into the room.
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users_in_room = yield self._get_joined_users_from_context(
room_id, state_group, current_state_ids,
on_invalidate=cache_context.invalidate,
event=event,
)
# We ignore app service users for now. This is so that we don't fill
# up the `get_if_users_have_pushers` cache with AS entries that we
# know don't have pushers, nor even read receipts.
local_users_in_room = set(
u for u in users_in_room
if self.hs.is_mine_id(u)
and not self.get_if_app_services_interested_in_user(u)
)
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# users in the room who have pushers need to get push rules run because
# that's how their pushers work
if_users_with_pushers = yield self.get_if_users_have_pushers(
local_users_in_room,
on_invalidate=cache_context.invalidate,
)
user_ids = set(
uid for uid, have_pusher in if_users_with_pushers.items() if have_pusher
)
users_with_receipts = yield self.get_users_with_read_receipts_in_room(
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room_id, on_invalidate=cache_context.invalidate,
)
# any users with pushers must be ours: they have pushers
for uid in users_with_receipts:
if uid in local_users_in_room:
user_ids.add(uid)
rules_by_user = yield self.bulk_get_push_rules(
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user_ids, on_invalidate=cache_context.invalidate,
)
rules_by_user = {k: v for k, v in rules_by_user.items() if v is not None}
defer.returnValue(rules_by_user)
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@cachedList(cached_method_name="get_push_rules_enabled_for_user",
list_name="user_ids", num_args=1, inlineCallbacks=True)
def bulk_get_push_rules_enabled(self, user_ids):
if not user_ids:
defer.returnValue({})
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results = {
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user_id: {}
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for user_id in user_ids
}
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rows = yield self._simple_select_many_batch(
table="push_rules_enable",
column="user_name",
iterable=user_ids,
retcols=("user_name", "rule_id", "enabled",),
desc="bulk_get_push_rules_enabled",
)
for row in rows:
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enabled = bool(row['enabled'])
results.setdefault(row['user_name'], {})[row['rule_id']] = enabled
defer.returnValue(results)
class PushRuleStore(PushRulesWorkerStore):
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@defer.inlineCallbacks
def add_push_rule(
self, user_id, rule_id, priority_class, conditions, actions,
before=None, after=None
):
conditions_json = json.dumps(conditions)
actions_json = json.dumps(actions)
with self._push_rules_stream_id_gen.get_next() as ids:
stream_id, event_stream_ordering = ids
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if before or after:
yield self.runInteraction(
"_add_push_rule_relative_txn",
self._add_push_rule_relative_txn,
stream_id, event_stream_ordering, user_id, rule_id, priority_class,
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conditions_json, actions_json, before, after,
)
else:
yield self.runInteraction(
"_add_push_rule_highest_priority_txn",
self._add_push_rule_highest_priority_txn,
stream_id, event_stream_ordering, user_id, rule_id, priority_class,
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conditions_json, actions_json,
)
def _add_push_rule_relative_txn(
self, txn, stream_id, event_stream_ordering, user_id, rule_id, priority_class,
conditions_json, actions_json, before, after
):
# Lock the table since otherwise we'll have annoying races between the
# SELECT here and the UPSERT below.
self.database_engine.lock_table(txn, "push_rules")
relative_to_rule = before or after
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res = self._simple_select_one_txn(
txn,
table="push_rules",
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keyvalues={
"user_name": user_id,
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"rule_id": relative_to_rule,
},
retcols=["priority_class", "priority"],
allow_none=True,
)
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if not res:
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raise RuleNotFoundException(
"before/after rule not found: %s" % (relative_to_rule,)
)
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base_priority_class = res["priority_class"]
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base_rule_priority = res["priority"]
if base_priority_class != priority_class:
raise InconsistentRuleException(
"Given priority class does not match class of relative rule"
)
if before:
# Higher priority rules are executed first, So adding a rule before
# a rule means giving it a higher priority than that rule.
new_rule_priority = base_rule_priority + 1
else:
# We increment the priority of the existing rules to make space for
# the new rule. Therefore if we want this rule to appear after
# an existing rule we give it the priority of the existing rule,
# and then increment the priority of the existing rule.
new_rule_priority = base_rule_priority
sql = (
"UPDATE push_rules SET priority = priority + 1"
" WHERE user_name = ? AND priority_class = ? AND priority >= ?"
)
txn.execute(sql, (user_id, priority_class, new_rule_priority))
self._upsert_push_rule_txn(
txn, stream_id, event_stream_ordering, user_id, rule_id, priority_class,
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new_rule_priority, conditions_json, actions_json,
)
def _add_push_rule_highest_priority_txn(
self, txn, stream_id, event_stream_ordering, user_id, rule_id, priority_class,
conditions_json, actions_json
):
# Lock the table since otherwise we'll have annoying races between the
# SELECT here and the UPSERT below.
self.database_engine.lock_table(txn, "push_rules")
# find the highest priority rule in that class
sql = (
"SELECT COUNT(*), MAX(priority) FROM push_rules"
" WHERE user_name = ? and priority_class = ?"
)
txn.execute(sql, (user_id, priority_class))
res = txn.fetchall()
(how_many, highest_prio) = res[0]
new_prio = 0
if how_many > 0:
new_prio = highest_prio + 1
self._upsert_push_rule_txn(
txn,
stream_id, event_stream_ordering, user_id, rule_id, priority_class, new_prio,
conditions_json, actions_json,
)
def _upsert_push_rule_txn(
self, txn, stream_id, event_stream_ordering, user_id, rule_id, priority_class,
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priority, conditions_json, actions_json, update_stream=True
):
"""Specialised version of _simple_upsert_txn that picks a push_rule_id
using the _push_rule_id_gen if it needs to insert the rule. It assumes
that the "push_rules" table is locked"""
sql = (
"UPDATE push_rules"
" SET priority_class = ?, priority = ?, conditions = ?, actions = ?"
" WHERE user_name = ? AND rule_id = ?"
)
txn.execute(sql, (
priority_class, priority, conditions_json, actions_json,
user_id, rule_id,
))
if txn.rowcount == 0:
# We didn't update a row with the given rule_id so insert one
push_rule_id = self._push_rule_id_gen.get_next()
self._simple_insert_txn(
txn,
table="push_rules",
values={
"id": push_rule_id,
"user_name": user_id,
"rule_id": rule_id,
"priority_class": priority_class,
"priority": priority,
"conditions": conditions_json,
"actions": actions_json,
},
)
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if update_stream:
self._insert_push_rules_update_txn(
txn, stream_id, event_stream_ordering, user_id, rule_id,
op="ADD",
data={
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"priority_class": priority_class,
"priority": priority,
"conditions": conditions_json,
"actions": actions_json,
}
)
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@defer.inlineCallbacks
def delete_push_rule(self, user_id, rule_id):
"""
Delete a push rule. Args specify the row to be deleted and can be
any of the columns in the push_rule table, but below are the
standard ones
Args:
user_id (str): The matrix ID of the push rule owner
rule_id (str): The rule_id of the rule to be deleted
"""
def delete_push_rule_txn(txn, stream_id, event_stream_ordering):
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self._simple_delete_one_txn(
txn,
"push_rules",
{'user_name': user_id, 'rule_id': rule_id},
)
self._insert_push_rules_update_txn(
txn, stream_id, event_stream_ordering, user_id, rule_id,
op="DELETE"
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)
with self._push_rules_stream_id_gen.get_next() as ids:
stream_id, event_stream_ordering = ids
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yield self.runInteraction(
"delete_push_rule", delete_push_rule_txn, stream_id, event_stream_ordering
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)
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@defer.inlineCallbacks
def set_push_rule_enabled(self, user_id, rule_id, enabled):
with self._push_rules_stream_id_gen.get_next() as ids:
stream_id, event_stream_ordering = ids
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yield self.runInteraction(
"_set_push_rule_enabled_txn",
self._set_push_rule_enabled_txn,
stream_id, event_stream_ordering, user_id, rule_id, enabled
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)
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def _set_push_rule_enabled_txn(
self, txn, stream_id, event_stream_ordering, user_id, rule_id, enabled
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):
new_id = self._push_rules_enable_id_gen.get_next()
self._simple_upsert_txn(
txn,
"push_rules_enable",
{'user_name': user_id, 'rule_id': rule_id},
{'enabled': 1 if enabled else 0},
{'id': new_id},
)
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self._insert_push_rules_update_txn(
txn, stream_id, event_stream_ordering, user_id, rule_id,
op="ENABLE" if enabled else "DISABLE"
)
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@defer.inlineCallbacks
def set_push_rule_actions(self, user_id, rule_id, actions, is_default_rule):
actions_json = json.dumps(actions)
def set_push_rule_actions_txn(txn, stream_id, event_stream_ordering):
if is_default_rule:
# Add a dummy rule to the rules table with the user specified
# actions.
priority_class = -1
priority = 1
self._upsert_push_rule_txn(
txn, stream_id, event_stream_ordering, user_id, rule_id,
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priority_class, priority, "[]", actions_json,
update_stream=False
)
else:
self._simple_update_one_txn(
txn,
"push_rules",
{'user_name': user_id, 'rule_id': rule_id},
{'actions': actions_json},
)
self._insert_push_rules_update_txn(
txn, stream_id, event_stream_ordering, user_id, rule_id,
op="ACTIONS", data={"actions": actions_json}
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)
with self._push_rules_stream_id_gen.get_next() as ids:
stream_id, event_stream_ordering = ids
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yield self.runInteraction(
"set_push_rule_actions", set_push_rule_actions_txn,
stream_id, event_stream_ordering
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)
def _insert_push_rules_update_txn(
self, txn, stream_id, event_stream_ordering, user_id, rule_id, op, data=None
):
values = {
"stream_id": stream_id,
"event_stream_ordering": event_stream_ordering,
"user_id": user_id,
"rule_id": rule_id,
"op": op,
}
if data is not None:
values.update(data)
self._simple_insert_txn(txn, "push_rules_stream", values=values)
txn.call_after(
self.get_push_rules_for_user.invalidate, (user_id,)
)
txn.call_after(
self.get_push_rules_enabled_for_user.invalidate, (user_id,)
)
txn.call_after(
self.push_rules_stream_cache.entity_has_changed, user_id, stream_id
)
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def get_all_push_rule_updates(self, last_id, current_id, limit):
"""Get all the push rules changes that have happend on the server"""
if last_id == current_id:
return defer.succeed([])
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def get_all_push_rule_updates_txn(txn):
sql = (
"SELECT stream_id, event_stream_ordering, user_id, rule_id,"
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" op, priority_class, priority, conditions, actions"
" FROM push_rules_stream"
" WHERE ? < stream_id AND stream_id <= ?"
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" ORDER BY stream_id ASC LIMIT ?"
)
txn.execute(sql, (last_id, current_id, limit))
return txn.fetchall()
return self.runInteraction(
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"get_all_push_rule_updates", get_all_push_rule_updates_txn
)
def get_push_rules_stream_token(self):
"""Get the position of the push rules stream.
Returns a pair of a stream id for the push_rules stream and the
room stream ordering it corresponds to."""
return self._push_rules_stream_id_gen.get_current_token()
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def get_max_push_rules_stream_id(self):
return self.get_push_rules_stream_token()[0]
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class RuleNotFoundException(Exception):
pass
class InconsistentRuleException(Exception):
pass