forked-synapse/synapse/rest/client/v1/push_rule.py
Mark Haines de27f7fc79 Add support for changing the actions for default rules
See matrix-org/matrix-doc#283

Works by adding dummy rules to the push rules table with a negative priority class and then using those rules to clobber the default rule actions when adding the default rules in ``list_with_base_rules``
2016-02-26 14:28:19 +00:00

423 lines
13 KiB
Python

# -*- coding: utf-8 -*-
# Copyright 2014-2016 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.api.errors import (
SynapseError, Codes, UnrecognizedRequestError, NotFoundError, StoreError
)
from .base import ClientV1RestServlet, client_path_patterns
from synapse.storage.push_rule import (
InconsistentRuleException, RuleNotFoundException
)
from synapse.push.baserules import list_with_base_rules, BASE_RULE_IDS
from synapse.push.rulekinds import (
PRIORITY_CLASS_MAP, PRIORITY_CLASS_INVERSE_MAP
)
import copy
import simplejson as json
class PushRuleRestServlet(ClientV1RestServlet):
PATTERNS = client_path_patterns("/pushrules/.*$")
SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR = (
"Unrecognised request: You probably wanted a trailing slash")
@defer.inlineCallbacks
def on_PUT(self, request):
spec = _rule_spec_from_path(request.postpath)
try:
priority_class = _priority_class_from_spec(spec)
except InvalidRuleException as e:
raise SynapseError(400, e.message)
requester = yield self.auth.get_user_by_req(request)
if '/' in spec['rule_id'] or '\\' in spec['rule_id']:
raise SynapseError(400, "rule_id may not contain slashes")
content = _parse_json(request)
if 'attr' in spec:
yield self.set_rule_attr(requester.user.to_string(), spec, content)
defer.returnValue((200, {}))
if spec['rule_id'].startswith('.'):
# Rule ids starting with '.' are reserved for server default rules.
raise SynapseError(400, "cannot add new rule_ids that start with '.'")
try:
(conditions, actions) = _rule_tuple_from_request_object(
spec['template'],
spec['rule_id'],
content,
)
except InvalidRuleException as e:
raise SynapseError(400, e.message)
before = request.args.get("before", None)
if before:
before = _namespaced_rule_id(spec, before[0])
after = request.args.get("after", None)
if after:
after = _namespaced_rule_id(spec, after[0])
try:
yield self.hs.get_datastore().add_push_rule(
user_id=requester.user.to_string(),
rule_id=_namespaced_rule_id_from_spec(spec),
priority_class=priority_class,
conditions=conditions,
actions=actions,
before=before,
after=after
)
except InconsistentRuleException as e:
raise SynapseError(400, e.message)
except RuleNotFoundException as e:
raise SynapseError(400, e.message)
defer.returnValue((200, {}))
@defer.inlineCallbacks
def on_DELETE(self, request):
spec = _rule_spec_from_path(request.postpath)
requester = yield self.auth.get_user_by_req(request)
namespaced_rule_id = _namespaced_rule_id_from_spec(spec)
try:
yield self.hs.get_datastore().delete_push_rule(
requester.user.to_string(), namespaced_rule_id
)
defer.returnValue((200, {}))
except StoreError as e:
if e.code == 404:
raise NotFoundError()
else:
raise
@defer.inlineCallbacks
def on_GET(self, request):
requester = yield self.auth.get_user_by_req(request)
user = requester.user
# we build up the full structure and then decide which bits of it
# to send which means doing unnecessary work sometimes but is
# is probably not going to make a whole lot of difference
rawrules = yield self.hs.get_datastore().get_push_rules_for_user(
user.to_string()
)
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
ruleslist = copy.deepcopy(list_with_base_rules(ruleslist))
rules = {'global': {}, 'device': {}}
rules['global'] = _add_empty_priority_class_arrays(rules['global'])
enabled_map = yield self.hs.get_datastore().\
get_push_rules_enabled_for_user(user.to_string())
for r in ruleslist:
rulearray = None
template_name = _priority_class_to_template_name(r['priority_class'])
# Remove internal stuff.
for c in r["conditions"]:
c.pop("_id", None)
pattern_type = c.pop("pattern_type", None)
if pattern_type == "user_id":
c["pattern"] = user.to_string()
elif pattern_type == "user_localpart":
c["pattern"] = user.localpart
rulearray = rules['global'][template_name]
template_rule = _rule_to_template(r)
if template_rule:
if r['rule_id'] in enabled_map:
template_rule['enabled'] = enabled_map[r['rule_id']]
elif 'enabled' in r:
template_rule['enabled'] = r['enabled']
else:
template_rule['enabled'] = True
rulearray.append(template_rule)
path = request.postpath[1:]
if path == []:
# we're a reference impl: pedantry is our job.
raise UnrecognizedRequestError(
PushRuleRestServlet.SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR
)
if path[0] == '':
defer.returnValue((200, rules))
elif path[0] == 'global':
path = path[1:]
result = _filter_ruleset_with_path(rules['global'], path)
defer.returnValue((200, result))
else:
raise UnrecognizedRequestError()
def on_OPTIONS(self, _):
return 200, {}
def set_rule_attr(self, user_id, spec, val):
if spec['attr'] == 'enabled':
if isinstance(val, dict) and "enabled" in val:
val = val["enabled"]
if not isinstance(val, bool):
# Legacy fallback
# This should *actually* take a dict, but many clients pass
# bools directly, so let's not break them.
raise SynapseError(400, "Value for 'enabled' must be boolean")
namespaced_rule_id = _namespaced_rule_id_from_spec(spec)
return self.hs.get_datastore().set_push_rule_enabled(
user_id, namespaced_rule_id, val
)
elif spec['attr'] == 'actions':
actions = val.get('actions')
_check_actions(actions)
namespaced_rule_id = _namespaced_rule_id_from_spec(spec)
rule_id = spec['rule_id']
is_default_rule = rule_id.startswith(".")
if is_default_rule:
if namespaced_rule_id not in BASE_RULE_IDS:
raise SynapseError(404, "Unknown rule %r" % (namespaced_rule_id,))
return self.hs.get_datastore().set_push_rule_actions(
user_id, namespaced_rule_id, actions, is_default_rule
)
else:
raise UnrecognizedRequestError()
def _rule_spec_from_path(path):
if len(path) < 2:
raise UnrecognizedRequestError()
if path[0] != 'pushrules':
raise UnrecognizedRequestError()
scope = path[1]
path = path[2:]
if scope != 'global':
raise UnrecognizedRequestError()
if len(path) == 0:
raise UnrecognizedRequestError()
template = path[0]
path = path[1:]
if len(path) == 0 or len(path[0]) == 0:
raise UnrecognizedRequestError()
rule_id = path[0]
spec = {
'scope': scope,
'template': template,
'rule_id': rule_id
}
path = path[1:]
if len(path) > 0 and len(path[0]) > 0:
spec['attr'] = path[0]
return spec
def _rule_tuple_from_request_object(rule_template, rule_id, req_obj):
if rule_template in ['override', 'underride']:
if 'conditions' not in req_obj:
raise InvalidRuleException("Missing 'conditions'")
conditions = req_obj['conditions']
for c in conditions:
if 'kind' not in c:
raise InvalidRuleException("Condition without 'kind'")
elif rule_template == 'room':
conditions = [{
'kind': 'event_match',
'key': 'room_id',
'pattern': rule_id
}]
elif rule_template == 'sender':
conditions = [{
'kind': 'event_match',
'key': 'user_id',
'pattern': rule_id
}]
elif rule_template == 'content':
if 'pattern' not in req_obj:
raise InvalidRuleException("Content rule missing 'pattern'")
pat = req_obj['pattern']
conditions = [{
'kind': 'event_match',
'key': 'content.body',
'pattern': pat
}]
else:
raise InvalidRuleException("Unknown rule template: %s" % (rule_template,))
if 'actions' not in req_obj:
raise InvalidRuleException("No actions found")
actions = req_obj['actions']
_check_actions(actions)
return conditions, actions
def _check_actions(actions):
if not isinstance(actions, list):
raise InvalidRuleException("No actions found")
for a in actions:
if a in ['notify', 'dont_notify', 'coalesce']:
pass
elif isinstance(a, dict) and 'set_tweak' in a:
pass
else:
raise InvalidRuleException("Unrecognised action")
def _add_empty_priority_class_arrays(d):
for pc in PRIORITY_CLASS_MAP.keys():
d[pc] = []
return d
def _filter_ruleset_with_path(ruleset, path):
if path == []:
raise UnrecognizedRequestError(
PushRuleRestServlet.SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR
)
if path[0] == '':
return ruleset
template_kind = path[0]
if template_kind not in ruleset:
raise UnrecognizedRequestError()
path = path[1:]
if path == []:
raise UnrecognizedRequestError(
PushRuleRestServlet.SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR
)
if path[0] == '':
return ruleset[template_kind]
rule_id = path[0]
the_rule = None
for r in ruleset[template_kind]:
if r['rule_id'] == rule_id:
the_rule = r
if the_rule is None:
raise NotFoundError
path = path[1:]
if len(path) == 0:
return the_rule
attr = path[0]
if attr in the_rule:
# Make sure we return a JSON object as the attribute may be a
# JSON value.
return {attr: the_rule[attr]}
else:
raise UnrecognizedRequestError()
def _priority_class_from_spec(spec):
if spec['template'] not in PRIORITY_CLASS_MAP.keys():
raise InvalidRuleException("Unknown template: %s" % (spec['template']))
pc = PRIORITY_CLASS_MAP[spec['template']]
return pc
def _priority_class_to_template_name(pc):
return PRIORITY_CLASS_INVERSE_MAP[pc]
def _rule_to_template(rule):
unscoped_rule_id = None
if 'rule_id' in rule:
unscoped_rule_id = _rule_id_from_namespaced(rule['rule_id'])
template_name = _priority_class_to_template_name(rule['priority_class'])
if template_name in ['override', 'underride']:
templaterule = {k: rule[k] for k in ["conditions", "actions"]}
elif template_name in ["sender", "room"]:
templaterule = {'actions': rule['actions']}
unscoped_rule_id = rule['conditions'][0]['pattern']
elif template_name == 'content':
if len(rule["conditions"]) != 1:
return None
thecond = rule["conditions"][0]
if "pattern" not in thecond:
return None
templaterule = {'actions': rule['actions']}
templaterule["pattern"] = thecond["pattern"]
if unscoped_rule_id:
templaterule['rule_id'] = unscoped_rule_id
if 'default' in rule:
templaterule['default'] = rule['default']
return templaterule
def _namespaced_rule_id_from_spec(spec):
return _namespaced_rule_id(spec, spec['rule_id'])
def _namespaced_rule_id(spec, rule_id):
return "global/%s/%s" % (spec['template'], rule_id)
def _rule_id_from_namespaced(in_rule_id):
return in_rule_id.split('/')[-1]
class InvalidRuleException(Exception):
pass
# XXX: C+ped from rest/room.py - surely this should be common?
def _parse_json(request):
try:
content = json.loads(request.content.read())
return content
except ValueError:
raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
def register_servlets(hs, http_server):
PushRuleRestServlet(hs).register(http_server)