# -*- coding: utf-8 -*-

# Copyright 2014 Foxdog Studios
#
# 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 __future__ import absolute_import
from __future__ import division
from __future__ import print_function

__all__ = ['Subscriber']


class Subscriber(object):
    def __init__(self, board, subscriptions):
        self._board = board
        self._subscriptions = subscriptions

    def _apply(self, func):
        for topic, subscriber in self._subscriptions.iteritems():
            func(topic, subscriber)

    def subscribe(self):
        self._apply(self._board.subscribe)

    def unsubscribe(self):
        self._apply(self._board.unsubscribe)

