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# -*- 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
from ._base import BaseHandler
from synapse.api.errors import Codes, StoreError, SynapseError
from synapse.appservice import ApplicationService
from synapse.appservice.api import ApplicationServiceApi
import synapse.util.stringutils as stringutils
import logging
logger = logging.getLogger(__name__)
# NB: Purposefully not inheriting BaseHandler since that contains way too much
# setup code which this handler does not need or use. This makes testing a lot
# easier.
class ApplicationServicesHandler(object):
def __init__(self, hs):
self.store = hs.get_datastore()
self.hs = hs
self.appservice_api = ApplicationServiceApi(hs)
@defer.inlineCallbacks
def register(self, app_service):
logger.info("Register -> %s", app_service)
# check the token is recognised
try:
stored_service = yield self.store.get_app_service_by_token(
app_service.token
)
if not stored_service:
raise StoreError(404, "Application service not found")
except StoreError:
raise SynapseError(
403, "Unrecognised application services token. "
"Consult the home server admin.",
errcode=Codes.FORBIDDEN
)
logger.info("Updating application service info...")
app_service.hs_token = self._generate_hs_token()
yield self.store.update_app_service(app_service)
defer.returnValue(app_service)
def unregister(self, token):
logger.info("Unregister as_token=%s", token)
yield self.store.unregister_app_service(token)
@defer.inlineCallbacks
def get_services_for_event(self, event, restrict_to=""):
"""Retrieve a list of application services interested in this event.
Args:
event(Event): The event to check.
restrict_to(str): The namespace to restrict regex tests to.
Returns:
list<ApplicationService>: A list of services interested in this
event based on the service regex.
"""
# We need to know the aliases associated with this event.room_id, if any
alias_list = [] # TODO
services = yield self.store.get_app_services()
interested_list = [
s for s in services if (
s.is_interested(event, restrict_to, alias_list)
)
]
defer.returnValue(interested_list)
@defer.inlineCallbacks
def notify_interested_services(self, event):
"""Notifies (pushes) all application services interested in this event.
Pushing is done asynchronously, so this method won't block for any
prolonged length of time.
Args:
event(Event): The event to push out to interested services.
"""
# Gather interested services
services = yield self.get_services_for_event(event)
if len(services) == 0:
return # no services need notifying
# Do we know this user exists? If not, poke the user query API for
# all services which match that user regex.
unknown_user = False # TODO check
if unknown_user:
user_query_services = yield self.get_services_for_event(
event=event,
restrict_to=ApplicationService.NS_USERS
)
for user_service in user_query_services:
# this needs to block XXX: Need to feed response back to caller
is_known_user = yield self.appservice_api.query_user(
user_service, event.sender
)
if is_known_user:
# the user exists now,so don't query more ASes.
break
# Do we know this room alias exists? If not, poke the room alias query
# API for all services which match that room alias regex.
unknown_room_alias = False # TODO check
if unknown_room_alias:
alias = "something" # TODO
alias_query_services = yield self.get_services_for_event(
event=event,
restrict_to=ApplicationService.NS_ALIASES
)
for alias_service in alias_query_services:
# this needs to block XXX: Need to feed response back to caller
is_known_alias = yield self.appservice_api.query_alias(
alias_service, alias
)
if is_known_alias:
# the alias exists now so don't query more ASes.
break
# Fork off pushes to these services - XXX First cut, best effort
for service in services:
self.appservice_api.push(service, event)
def _generate_hs_token(self):
return stringutils.random_string(18)
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