synapse-product/synapse/rest/client/v1/push_rule.py

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# -*- 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 twisted.internet import defer
from synapse.api.errors import SynapseError, Codes, UnrecognizedRequestError, NotFoundError
from base import RestServlet, client_path_pattern
from synapse.storage.push_rule import InconsistentRuleException, RuleNotFoundException
import json
class PushRuleRestServlet(RestServlet):
PATTERN = client_path_pattern("/pushrules/.*$")
PRIORITY_CLASS_MAP = {
'underride': 0,
'sender': 1,
'room': 2,
'content': 3,
'override': 4
}
PRIORITY_CLASS_INVERSE_MAP = {v: k for k,v in PRIORITY_CLASS_MAP.items()}
SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR =\
"Unrecognised request: You probably wanted a trailing slash"
def rule_spec_from_path(self, path):
if len(path) < 2:
raise UnrecognizedRequestError()
if path[0] != 'pushrules':
raise UnrecognizedRequestError()
scope = path[1]
path = path[2:]
if scope not in ['global', 'device']:
raise UnrecognizedRequestError()
device = None
if scope == 'device':
if len(path) == 0:
raise UnrecognizedRequestError()
device = path[0]
path = path[1:]
if len(path) == 0:
raise UnrecognizedRequestError()
template = path[0]
path = path[1:]
if len(path) == 0:
raise UnrecognizedRequestError()
rule_id = path[0]
spec = {
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'scope': scope,
'template': template,
'rule_id': rule_id
}
if device:
spec['device'] = device
return spec
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def rule_tuple_from_request_object(self, rule_template, rule_id, req_obj, device=None):
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'")
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pat = req_obj['pattern']
if pat.strip("*?[]") == pat:
# no special glob characters so we assume the user means
# 'contains this string' rather than 'is this string'
pat = "*%s*" % (pat)
conditions = [{
'kind': 'event_match',
'key': 'content.body',
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'pattern': pat
}]
else:
raise InvalidRuleException("Unknown rule template: %s" % (rule_template,))
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if device:
conditions.append({
'kind': 'device',
'instance_handle': device
})
if 'actions' not in req_obj:
raise InvalidRuleException("No actions found")
actions = req_obj['actions']
for a in actions:
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if a in ['notify', 'dont_notify', 'coalesce']:
pass
elif isinstance(a, dict) and 'set_sound' in a:
pass
else:
raise InvalidRuleException("Unrecognised action")
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return conditions, actions
@defer.inlineCallbacks
def on_PUT(self, request):
spec = self.rule_spec_from_path(request.postpath)
try:
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priority_class = _priority_class_from_spec(spec)
except InvalidRuleException as e:
raise SynapseError(400, e.message)
user = yield self.auth.get_user_by_req(request)
content = _parse_json(request)
try:
(conditions, actions) = self.rule_tuple_from_request_object(
spec['template'],
spec['rule_id'],
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content,
device=spec['device'] if 'device' in spec else None
)
except InvalidRuleException as e:
raise SynapseError(400, e.message)
before = request.args.get("before", None)
if before and len(before):
before = before[0]
after = request.args.get("after", None)
if after and len(after):
after = after[0]
try:
yield self.hs.get_datastore().add_push_rule(
user_name=user.to_string(),
rule_id=spec['rule_id'],
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_GET(self, request):
user = yield self.auth.get_user_by_req(request)
# 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_name(user.to_string())
rules = {'global': {}, 'device': {}}
rules['global'] = _add_empty_priority_class_arrays(rules['global'])
for r in rawrules:
rulearray = None
r["conditions"] = json.loads(r["conditions"])
r["actions"] = json.loads(r["actions"])
template_name = _priority_class_to_template_name(r['priority_class'])
if r['priority_class'] > PushRuleRestServlet.PRIORITY_CLASS_MAP['override']:
# per-device rule
instance_handle = _instance_handle_from_conditions(r["conditions"])
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r = _strip_device_condition(r)
if not instance_handle:
continue
if instance_handle not in rules['device']:
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rules['device'][instance_handle] = {}
rules['device'][instance_handle] = \
_add_empty_priority_class_arrays(rules['device'][instance_handle])
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rulearray = rules['device'][instance_handle][template_name]
else:
rulearray = rules['global'][template_name]
template_rule = _rule_to_template(r)
if template_rule:
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))
elif path[0] == 'device':
path = path[1:]
if path == []:
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raise UnrecognizedRequestError(PushRuleRestServlet.SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR)
if path[0] == '':
defer.returnValue((200, rules['device']))
instance_handle = path[0]
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path = path[1:]
if instance_handle not in rules['device']:
ret = {}
ret = _add_empty_priority_class_arrays(ret)
defer.returnValue((200, ret))
ruleset = rules['device'][instance_handle]
result = _filter_ruleset_with_path(ruleset, path)
defer.returnValue((200, result))
else:
raise UnrecognizedRequestError()
def on_OPTIONS(self, _):
return 200, {}
def _add_empty_priority_class_arrays(d):
for pc in PushRuleRestServlet.PRIORITY_CLASS_MAP.keys():
d[pc] = []
return d
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def _instance_handle_from_conditions(conditions):
"""
Given a list of conditions, return the instance handle of the
device rule if there is one
"""
for c in conditions:
if c['kind'] == 'device':
return c['instance_handle']
return None
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]
for r in ruleset[template_kind]:
if r['rule_id'] == rule_id:
return r
raise NotFoundError
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def _priority_class_from_spec(spec):
if spec['template'] not in PushRuleRestServlet.PRIORITY_CLASS_MAP.keys():
raise InvalidRuleException("Unknown template: %s" % (spec['kind']))
pc = PushRuleRestServlet.PRIORITY_CLASS_MAP[spec['template']]
if spec['scope'] == 'device':
pc += len(PushRuleRestServlet.PRIORITY_CLASS_MAP)
return pc
def _priority_class_to_template_name(pc):
if pc > PushRuleRestServlet.PRIORITY_CLASS_MAP['override']:
# per-device
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prio_class_index = pc - len(PushRuleRestServlet.PRIORITY_CLASS_MAP)
return PushRuleRestServlet.PRIORITY_CLASS_INVERSE_MAP[prio_class_index]
else:
return PushRuleRestServlet.PRIORITY_CLASS_INVERSE_MAP[pc]
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def _rule_to_template(rule):
template_name = _priority_class_to_template_name(rule['priority_class'])
if template_name in ['override', 'underride']:
return {k:rule[k] for k in ["rule_id", "conditions", "actions"]}
elif template_name in ["sender", "room"]:
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return {k: rule[k] for k in ["rule_id", "actions"]}
elif template_name == 'content':
if len(rule["conditions"]) != 1:
return None
thecond = rule["conditions"][0]
if "pattern" not in thecond:
return None
ret = {k:rule[k] for k in ["rule_id", "actions"]}
ret["pattern"] = thecond["pattern"]
return ret
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def _strip_device_condition(rule):
for i,c in enumerate(rule['conditions']):
if c['kind'] == 'device':
del rule['conditions'][i]
return rule
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())
if type(content) != dict:
raise SynapseError(400, "Content must be a JSON object.",
errcode=Codes.NOT_JSON)
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)