#
#    Copyright (c) 2022 Project CHIP Authors
#    All rights reserved.
#
#    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 VariableStorage:
    '''Stores key value pairs.

    This is a code readability convience object for saving/loading values.
    '''

    def __init__(self):
        self._saved_list = {}

    def save(self, key, value):
        self._saved_list[key] = value

    def load(self, key):
        return self._saved_list.get(key)

    def is_key_saved(self, key) -> bool:
        return key in self._saved_list

    def clear(self):
        self._saved_list.clear()