90 lines
3.3 KiB
Python
90 lines
3.3 KiB
Python
# ogrn.py - functions for handling Russian company registration numbers
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# coding: utf-8
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#
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# Copyright (C) 2024 Ivan Stavropoltsev
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# Copyright (C) 2025 Arthur de Jong
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301 USA
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"""ОГРН, OGRN, PSRN, ОГРНИП, OGRNIP (Russian Primary State Registration Number).
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The ОГРН (Основной государственный регистрационный номер, Primary State
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Registration Number) is a Russian identifier for legal entities. The number
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consists of 13 or 15 digits and includes information on the type of
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organisation, the registration year and a tax inspection code. The 15 digit
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variant is called ОГРНИП (Основной государственный регистрационный номер
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индивидуального предпринимателя, Primary State Registration Number of an
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Individual Entrepreneur).
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More information:
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* https://ru.wikipedia.org/wiki/Основной_государственный_регистрационный_номер
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* https://ru.wikipedia.org/wiki/Основной_государственный_регистрационный_номер_индивидуального_предпринимателя
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>>> validate('1022200525819')
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'1022200525819'
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>>> validate('385768585948949')
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'385768585948949'
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>>> validate('1022500001328')
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Traceback (most recent call last):
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...
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InvalidChecksum: ...
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"""
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from __future__ import annotations
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from stdnum.exceptions import *
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from stdnum.util import clean, isdigits
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def compact(number: str) -> str:
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"""Convert the number to the minimal representation. This strips the
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number of any valid separators and removes surrounding whitespace."""
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return clean(number, ' ')
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def calc_check_digit(number: str) -> str:
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"""Calculate the control digit of the OGRN based on its length."""
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if len(number) == 13:
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return str(int(number[:-1]) % 11 % 10)
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else:
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return str(int(number[:-1]) % 13)
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def validate(number: str) -> str:
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"""Determine if the given number is a valid OGRN."""
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number = compact(number)
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if not isdigits(number):
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raise InvalidFormat()
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if len(number) == 13:
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if number[0] == '0':
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raise InvalidComponent()
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elif len(number) == 15:
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if number[0] not in '34':
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raise InvalidComponent()
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else:
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raise InvalidLength()
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if number[-1] != calc_check_digit(number):
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raise InvalidChecksum()
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return number
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def is_valid(number: str) -> bool:
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"""Check if the number is a valid OGRN."""
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try:
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return bool(validate(number))
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except ValidationError:
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return False
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