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# -*- coding: utf-8 -*-
# Copyright 2017 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.
class SpamChecker(object):
def __init__(self, hs):
self.spam_checker = None
if hs.config.spam_checker is not None:
module, config = hs.config.spam_checker
self.spam_checker = module(config=config)
def check_event_for_spam(self, event):
"""Checks if a given event is considered "spammy" by this server.
If the server considers an event spammy, then it will be rejected if
sent by a local user. If it is sent by a user on another server, then
users receive a blank event.
Args:
event (synapse.events.EventBase): the event to be checked
Returns:
bool: True if the event is spammy.
"""
if self.spam_checker is None:
return False
return self.spam_checker.check_event_for_spam(event)
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