101 lines
3 KiB
Python
101 lines
3 KiB
Python
# nif.py - functions for handling Algeria NIF numbers
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# coding: utf-8
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#
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# Copyright (C) 2022 Leandro Regueiro
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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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"""NIF, sometimes N.I.F. (Numéro d'Identification Fiscale, Algeria tax number).
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The NIF was adopted by the Algerian tax authorities on 2006, replacing the NIS
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number.
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The NIF applies to physical persons, legal persons, legal entities,
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administrative entities, local branches for foreign companies, associations,
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professional organisations, etc.
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The NIF consists of 15 digits, but sometimes it can be 20 digits long in order
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to represent branches or secondary establishments.
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More information:
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* http://www.jecreemonentreprise.dz/index.php?option=com_content&view=article&id=612&Itemid=463&lang=fr
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* https://www.mf.gov.dz/index.php/fr/fiscalite
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* https://cnrcinfo.cnrc.dz/numero-didentification-fiscale-nif/
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* https://nifenligne.mfdgi.gov.dz/
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* http://nif.mfdgi.gov.dz/nif.asp
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>>> validate('416001000000007')
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'416001000000007'
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>>> validate('408 020 000 150 039')
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'408020000150039'
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>>> validate('41201600000606600001')
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'41201600000606600001'
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>>> validate('000 216 001 808 337 13010')
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'00021600180833713010'
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>>> validate('12345')
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Traceback (most recent call last):
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...
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InvalidLength: ...
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>>> validate('X1600100000000V')
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Traceback (most recent call last):
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...
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InvalidFormat: ...
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>>> format('408 020 000 150 039')
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'408020000150039'
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>>> format('000 216 001 808 337 13010')
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'00021600180833713010'
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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.
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This strips the number of any valid separators, removes surrounding
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whitespace.
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"""
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return clean(number, ' ')
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def validate(number: str) -> str:
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"""Check if the number is a valid Algeria NIF number.
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This checks the length and formatting.
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"""
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number = compact(number)
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if len(number) not in (15, 20):
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raise InvalidLength()
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if not isdigits(number):
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raise InvalidFormat()
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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 Algeria NIF number."""
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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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def format(number: str) -> str:
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"""Reformat the number to the standard presentation format."""
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return compact(number)
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