Add support for North Macedonia TIN

stdnum/mk/__init__.py

@@ -0,0 +1,24 @@
+# __init__.py - collection of North Macedonia 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
+
+"""Collection of North Macedonia numbers."""
+
+# provide aliases
+from stdnum.mk import edb as vat  # noqa: F401

stdnum/mk/edb.py

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+# edb.py - functions for handling North Macedonia EDB 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
+
+"""ЕДБ (Едниствен Даночен Број, North Macedonia tax number).
+
+This number consists of 13 digits, sometimes with an additional "MK" prefix.
+
+More information:
+
+* http://www.ujp.gov.mk/en
+* https://forum.it.mk/threads/modularna-kontrola-na-embg-edb-dbs-itn.15663/?__cf_chl_tk=Op2PaEIauip6Z.ZjvhP897O8gRVAwe5CDAVTpjx1sEo-1663498930-0-gaNycGzNCRE#post-187048
+
+>>> validate('4030000375897')
+'4030000375897'
+>>> validate(u'МК 4020990116747')
+'4020990116747'
+>>> validate('MK4057009501106')
+'4057009501106'
+>>> validate(u'МК4030006603425')
+'4030006603425'
+>>> validate('12345')
+Traceback (most recent call last):
+    ...
+InvalidLength: ...
+>>> validate('1234567890XYZ')
+Traceback (most recent call last):
+    ...
+InvalidFormat: ...
+>>> validate('4030000375890')
+Traceback (most recent call last):
+    ...
+InvalidChecksum: ...
+>>> format('4030000375897')
+'4030000375897'
+>>> format(u'МК 4020990116747')
+'4020990116747'
+>>> format('MK4057009501106')
+'4057009501106'
+>>> format(u'МК4030006603425')
+'4030006603425'
+"""  # noqa: E501
+
+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.
+    """
+    number = clean(number, ' -').upper().strip()
+    if number.startswith('MK') or number.startswith(u'МК'):
+        return number[2:]
+    return number
+
+
+def calc_check_digit(number):
+    """Calculate the check digit."""
+    weights = (7, 6, 5, 4, 3, 2, 7, 6, 5, 4, 3, 2)
+    total = sum(int(n) * w for n, w in zip(number, weights))
+    return str((-total % 11) % 10)
+
+
+def validate(number):
+    """Check if the number is a valid North Macedonia ЕДБ number.
+
+    This checks the length, formatting and check digit.
+    """
+    number = compact(number)
+    if len(number) != 13:
+        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 North Macedonia ЕДБ number."""
+    try:
+        return bool(validate(number))
+    except ValidationError:
+        return False
+
+
+def format(number):
+    """Reformat the number to the standard presentation format."""
+    return compact(number)