# Copyright 2021, Peter Birch, mailto:peter@lightlogic.co.uk
#
# 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 Base:
    """ Packtype base class """

    ID = 0

    @classmethod
    def issue_id(cls):
        """ Issue a unique ID to assist with ordering """
        issued   = Base.ID
        Base.ID += 1
        return issued

    def __init__(self):
        self.__id = Base.issue_id()

    @property
    def _pt_id(self):
        return self.__id
