Source code for tendril.pricing.gst
# Copyright (C) 2019 Chintalagiri Shashank
#
# This file is part of Tendril.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Specialized Primitives for GST Support
--------------------------------------
"""
# TODO Move to configs
DEFAULT_TAX = [{'tax': 'CGST', 'rate': '9%'},
{'tax': 'SGST', 'rate': '9%'},
{'tax': 'IGST', 'rate': '0%'}]
[docs]class GSTMixin(object):
[docs] def _get_tax(self, name):
raise NotImplementedError
[docs] def override_tax_rate(self, rate, tax=None):
raise NotImplementedError
[docs] def gst_set_national(self):
sgst = self._get_tax('SGST')
cgst = self._get_tax('CGST')
if sgst.rate == 0:
return
if cgst.rate == 0:
return
self.override_tax_rate(cgst.rate + sgst.rate, tax='IGST')
self.override_tax_rate(0, tax='CGST')
self.override_tax_rate(0, tax='SGST')
[docs] def gst_set_local(self):
igst = self._get_tax('IGST')
if igst.rate == 0:
return
self.override_tax_rate(igst.rate / 2, tax='SGST')
self.override_tax_rate(igst.rate / 2, tax='CGST')
self.override_tax_rate(0, tax='IGST')