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# businessid.py - functions for handling Austrian company register numbers
#
# Copyright (C) 2015 Holvi Payment Services Oy
# Copyright (C) 2012, 2013 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
"""Austrian Company Register Numbers.
The Austrian company register number consist of digits followed by a single
letter, e.g. "122119m". Sometimes it is presented with preceding "FN", e.g.
"FN 122119m".
>>> validate('FN 122119m')
'122119m'
>>> validate('122119m')
'122119m'
>>> validate('m123123')
Traceback (most recent call last):
...
InvalidFormat: ...
>>> validate('abc')
Traceback (most recent call last):
...
InvalidFormat: ...
"""
from stdnum.exceptions import *
from stdnum.util import clean
def compact(number):
"""Convert the number to the minimal representation. This strips the
number of any valid separators and removes surrounding whitespace.
Preceding "FN" is also removed."""
number = clean(number, ' -./').strip()
if number.upper().startswith('FN'):
number = number[2:]
return number
def validate(number):
"""Check if the number is a valid company register number. This only
checks the formatting."""
number = compact(number)
if not number[-1:].isalpha() or not number[:-1].isdigit():
raise InvalidFormat()
return number
def is_valid(number):
"""Check if the number is a valid company register number."""
try:
return bool(validate(number))
except ValidationError:
return False
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