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57 lines
1.6 KiB
57 lines
1.6 KiB
# -*- coding: utf-8 -*-
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from abc import ABCMeta, abstractmethod
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class TariffBase(metaclass=ABCMeta):
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@abstractmethod
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def calc_amount(self):
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"""Calculates total amount of payment"""
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raise NotImplementedError
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@abstractmethod
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def calc_deadline(self):
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"""Calculate deadline date"""
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raise NotImplementedError
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@staticmethod
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def description():
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"""
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Usage in mydefs.MyChoicesAdapter for choices fields.
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:return: human readable description
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"""
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raise NotImplementedError
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@staticmethod
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def manage_access(abon):
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"""Manage subscribers access to service"""
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#assert isinstance(abon, Abon)
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if not abon.is_active: return False
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act_tar = abon.active_tariff()
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if act_tar:
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return True
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class PeriodicPayCalcBase(metaclass=ABCMeta):
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@abstractmethod
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def calc_amount(self, model_object):
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"""
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:param model_object: it is a instance of models.PeriodicPay model
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:return: float: amount for the service
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"""
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raise NotImplementedError
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@abstractmethod
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def get_next_time_to_pay(self, model_object, last_time_payment):
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"""
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:param model_object: it is a instance of models.PeriodicPay model
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:param last_time_payment: May be None if first pay
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:return: datetime.datetime: time for next pay
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"""
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raise NotImplementedError
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@staticmethod
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def description():
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"""Return text description.
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Uses in mydefs.MyChoicesAdapter for CHOICES fields"""
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raise NotImplementedError
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