1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
# vn.py - functions for handling Faroe Islands V-number numbers
# coding: utf-8
#
# 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
"""V-number (Vinnutal, Faroe Islands tax number).
In the Faroe Islands the legal persons TIN equals the V number issued by the
Faroese Tax Administration. It is a consecutive number.
More information:
* https://www.taks.fo/fo/borgari/bolkar/at-stovna-virki/
* https://www.oecd.org/tax/automatic-exchange/crs-implementation-and-assistance/tax-identification-numbers/Faroe-islands-TIN.pdf
>>> validate('623857')
'623857'
>>> validate('1234')
Traceback (most recent call last):
...
InvalidLength: ...
>>> validate('12345X')
Traceback (most recent call last):
...
InvalidFormat: ...
>>> format('602 590')
'602590'
""" # noqa: E501
from __future__ import annotations
from stdnum.exceptions import *
from stdnum.util import clean, isdigits
def compact(number: str) -> str:
"""Convert the number to the minimal representation.
This strips the number of any valid separators and removes surrounding
whitespace.
"""
number = clean(number, ' -.').upper().strip()
if number.startswith('FO'):
return number[2:]
return number
def validate(number: str) -> str:
"""Check if the number is a valid Faroe Islands V-number number.
This checks the length and formatting.
"""
number = compact(number)
if len(number) != 6:
raise InvalidLength()
if not isdigits(number):
raise InvalidFormat()
return number
def is_valid(number: str) -> bool:
"""Check if the number is a valid Faroe Islands V-number number."""
try:
return bool(validate(number))
except ValidationError:
return False
def format(number: str) -> str:
"""Reformat the number to the standard presentation format."""
return compact(number)
|
