old_contents: # -*- 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 synapse.api.errors import StoreError
  
  from ._base import SQLBaseStore
  
  
  class ApplicationServiceStore(SQLBaseStore):
  
      def __init__(self, hs):
          super(ApplicationServiceStore, self).__init__(hs)
  
          self.clock = hs.get_clock()
  
      @defer.inlineCallbacks
      def get_app_service(self, as_token):
          """Get the application service with the given token.
  
          Args:
              token (str): The application service token.
          Raises:
              StoreError if there was a problem retrieving this.
          """
          row = self._simple_select_one(
              "application_services", {"token": as_token},
              ["url", "token"]
          )
          if not row:
              raise StoreError(400, "Bad application services token supplied.")
          defer.returnValue(row)
  
new_contents: # -*- 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 synapse.api.errors import StoreError
  
  from ._base import SQLBaseStore
  
  
  # XXX: This feels like it should belong in a "models" module, not storage.
  class ApplicationService(object):
      """Defines an application service.
  
      Provides methods to check if this service is "interested" in events.
      """
  
      def __init__(self, token, url=None, namespaces=None):
          self.token = token
          if url:
              self.url = url
          if namespaces:
              self.namespaces = namespaces
  
      def is_interested(self, event):
          """Check if this service is interested in this event.
  
          Args:
              event(Event): The event to check.
          Returns:
              bool: True if this service would like to know about this event.
          """
          # NB: This does not check room alias regex matches because that requires
          # more context that an Event can provide. Room alias matches are checked
          # in the ApplicationServiceHandler.
  
          # TODO check if event.room_id regex matches
          # TODO check if event.user_id regex matches (or m.room.member state_key)
  
          return True
  
  
  class ApplicationServiceCache(object):
      """Caches ApplicationServices and provides utility functions on top.
  
      This class is designed to be invoked on incoming events in order to avoid
      hammering the database every time to extract a list of application service
      regexes.
      """
  
      def __init__(self):
          self.services = []
  
      def get_services_for_event(self, event):
          """Retrieve a list of application services interested in this event.
  
          Args:
              event(Event): The event to check.
          Returns:
              list<ApplicationService>: A list of services interested in this
              event based on the service regex.
          """
          interested_list = [
              s for s in self.services if s.is_event_claimed(event)
          ]
          return interested_list
  
  
  class ApplicationServiceStore(SQLBaseStore):
  
      def __init__(self, hs):
          super(ApplicationServiceStore, self).__init__(hs)
          self.cache = ApplicationServiceCache()
          self.clock = hs.get_clock()
  
      @defer.inlineCallbacks
      def get_app_service(self, as_token):
          """Get the application service with the given token.
  
          Args:
              token (str): The application service token.
          Raises:
              StoreError if there was a problem retrieving this.
          """
          row = self._simple_select_one(
              "application_services", {"token": as_token},
              ["url", "token"]
          )
          if not row:
              raise StoreError(400, "Bad application services token supplied.")
          defer.returnValue(row)
  
subject: Add AS specific classes with docstrings.