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Add support for Montenegro TIN
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Closes arthurdejong#331
Closes arthurdejong#223
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@unho @arthurdejong
unho authored and arthurdejong committed Oct 9, 2022
1 parent fbe094c commit 2b6e087
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3 changes: 3 additions & 0 deletions stdnum/me/__init__.py
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# 02110-1301 USA

"""Collection of Montenegro numbers."""

# provide aliases
from stdnum.me import pib as vat # noqa: F401
82 changes: 82 additions & 0 deletions stdnum/me/pib.py
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# pib.py - functions for handling Montenegro PIB numbers
# coding: utf-8
#
# Copyright (C) 2022 Leandro Regueiro
# Copyright (C) 2022 Arthur de Jong
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA

"""PIB (Poreski Identifikacioni Broj, Montenegro tax number).
This number consists of 8 digits.
More information:
* http://www.pretraga.crps.me:8083/
* https://www.vatify.eu/montenegro-vat-number.html
>>> validate('02655284')
'02655284'
>>> validate('02655283')
Traceback (most recent call last):
...
InvalidChecksum: ...
>>> format('02655284')
'02655284'
"""

from stdnum.exceptions import *
from stdnum.util import clean, isdigits


def compact(number):
"""Convert the number to the minimal representation.
This strips the number of any valid separators and removes surrounding
whitespace.
"""
return clean(number, ' ')


def calc_check_digit(number):
"""Calculate the check digit for the number."""
weights = (8, 7, 6, 5, 4, 3, 2)
return str((-sum(w * int(n) for w, n in zip(weights, number))) % 11 % 10)


def validate(number):
"""Check if the number is a valid Montenegro PIB number."""
number = compact(number)
if len(number) != 8:
raise InvalidLength()
if not isdigits(number):
raise InvalidFormat()
if number[-1] != calc_check_digit(number):
raise InvalidChecksum()
return number


def is_valid(number):
"""Check if the number is a valid Montenegro PIB number."""
try:
return bool(validate(number))
except ValidationError:
return False


def format(number):
"""Reformat the number to the standard presentation format."""
return compact(number)
180 changes: 180 additions & 0 deletions tests/test_me_pib.doctest
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test_me_pib.doctest - more detailed doctests for stdnum.me.pib module

Copyright (C) 2022 Leandro Regueiro

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA


This file contains more detailed doctests for the stdnum.me.pib module. It
tries to test more corner cases and detailed functionality that is not really
useful as module documentation.

>>> from stdnum.me import pib


Tests for some corner cases.

>>> pib.validate('02655284')
'02655284'
>>> pib.validate('12345')
Traceback (most recent call last):
...
InvalidLength: ...
>>> pib.validate('12345XYZ')
Traceback (most recent call last):
...
InvalidFormat: ...
>>> pib.format('02655284')
'02655284'


These have been found online and should all be valid numbers.

>>> numbers = '''
...
... 02000989
... 02005115
... 02005328
... 02007479
... 02008599
... 02015099
... 02017105
... 02018560
... 02026325
... 02033143
... 02033356
... 02044188
... 02046954
... 02047403
... 02051664
... 02052822
... 02082390
... 02085020
... 02087723
... 02094754
... 02096064
... 02096099
... 02106183
... 02118912
... 02126265
... 02131013
... 02132419
... 02160102
... 02171058
... 02194007
... 02196727
... 02216078
... 02219603
... 02241102
... 02259974
... 02264811
... 02265435
... 02272296
... 02291266
... 02293099
... 02303213
... 02305054
... 02305623
... 02309084
... 02310783
... 02313987
... 02335450
... 02355388
... 02357950
... 02383136
... 02384337
... 02385040
... 02389231
... 02395673
... 02404281
... 02407515
... 02436159
... 02437643
... 02440768
... 02448076
... 02454190
... 02455455
... 02462494
... 02465787
... 02467593
... 02628988
... 02630419
... 02653753
... 02656515
... 02671930
... 02694638
... 02697904
... 02702967
... 02705001
... 02707942
... 02709392
... 02717557
... 02739500
... 02751372
... 02759519
... 02766515
... 02769336
... 02783746
... 02865971
... 02868474
... 02880474
... 02894998
... 02896753
... 02904870
... 02908433
... 02952165
... 02959801
... 02983303
... 03016480
... 03022480
... 03037002
... 03099873
... 03183246
... 03313468
... 03328139
... 03350479
... 03350487
... 03350495
... 03350509
... 03350517
... 03350525
... 03350533
... 03350541
... 03350550
... 03350568
... 03350576
... 03350584
... 03350592
... 03350606
... 03350614
... 03350622
... 03350665
... 03350673
... 03350681
... 03350690
... 03350703
... 03350789
... 03351483
... 03352480
... 03353486
... 03354482
... 03355489
... 03356485
... 03357481
...
... '''
>>> [x for x in numbers.splitlines() if x and not pib.is_valid(x)]
[]

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