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# hp.py - functions for handling Israeli company numbers
# coding: utf-8
#
# Copyright (C) 2020 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
"""Company Number (מספר חברה, or short ח.פ. Israeli company number).
It consists of nine digits and includes a check digit. For companies
the first digit is a 5. The first two digits identify the type of
company.
More information:
* https://he.wikipedia.org/wiki/תאגיד#מספר_רישום_התאגיד
* https://www.oecd.org/tax/automatic-exchange/crs-implementation-and-assistance/tax-identification-numbers/Israel-TIN.pdf
* https://wiki.scn.sap.com/wiki/display/CRM/Israel
>>> validate('516179157')
'516179157'
>>> format(' 5161 79157 ')
'516179157'
>>> validate('516179150') # invalid check digit
Traceback (most recent call last):
...
InvalidChecksum: ...
>>> validate('490154203237518') # longer than 9 digits
Traceback (most recent call last):
...
InvalidLength: ...
>>> validate('416179157')
Traceback (most recent call last):
...
InvalidComponent: ...
"""
from stdnum import luhn
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 separators and removes surrounding whitespace."""
return clean(number, ' -').strip()
def validate(number):
"""Check if the number provided is a valid ID. This checks the length,
formatting and check digit."""
number = compact(number)
if len(number) != 9:
raise InvalidLength()
if not isdigits(number) or int(number) <= 0:
raise InvalidFormat()
if number[0] != '5':
raise InvalidComponent()
luhn.validate(number)
return number
def is_valid(number):
"""Check if the number provided is a valid ID. This checks the length,
formatting and check digit."""
try:
return bool(validate(number))
except ValidationError:
return False
def format(number):
"""Reformat the number to the standard presentation format."""
return compact(number)
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