# -*- 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.


# TODO(paul)
_filters_for_user = {}


class Filtering(object):

    def __init__(self, hs):
        super(Filtering, self).__init__()
        self.hs = hs

    def get_user_filter(self, user_localpart, filter_id):
        filters = _filters_for_user.get(user_localpart, None)

        if not filters or filter_id >= len(filters):
            raise KeyError()

        return filters[filter_id]

    def add_user_filter(self, user_localpart, definition):
        filters = _filters_for_user.setdefault(user_localpart, [])

        filter_id = len(filters)
        filters.append(definition)

        return filter_id