Add support for Morocco TIN

Fixes arthurdejong#226.

stdnum/ma/__init__.py

@@ -0,0 +1,24 @@
+# __init__.py - collection of Moroccan 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 Moroccan numbers."""
+
+# provide vat as an alias
+from stdnum.ma import ice as vat  # noqa: F401

stdnum/ma/ice.py

@@ -0,0 +1,101 @@
+# pin.py - functions for handling Morocco ICE 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
+
+"""ICE (Identifiant Commun de l’Entreprise, التعريف الموحد للمقاولة in Arabic,
+Morocco tax number).
+
+The ICE is a number that identifies the company and its branches in a unique
+and uniform way by all Moroccan administrations. It comes in addition to the
+other legal identifiers, notably the "identifiant fiscal" (IF), the "numéro de
+registre de commerce" (RC) and the CNSS number. The ICE does not replace these
+identifiers, which remain mandatory.
+
+The ICE is intended to ease communication among Moroccan administration
+branches, therefore simplifying procedures, increasing reliability and speed,
+and thefore reducing costs.
+
+The ICE applies to legal entities and their branches, as well as to natural
+persons.
+
+The ICE consists of 15 characters, where the first 9 represent the enterprise,
+the following 4 represent its establishments, and the last 2 are control
+characters.
+
+More information:
+
+* https://www.ice.gov.ma/
+* https://www.ice.gov.ma/ICE/Depliant_ICE.pdf
+* https://www.ice.gov.ma/ICE/Guide_ICE.pdf
+
+>>> validate('001561191000066')
+'001561191000066'
+>>> validate('00 21 36 09 30 00 040')
+'002136093000040'
+>>> validate('12345')
+Traceback (most recent call last):
+    ...
+InvalidLength: ...
+>>> validate('X0156119100006Z')
+Traceback (most recent call last):
+    ...
+InvalidFormat: ...
+>>> format('00 21 36 09 30 00 040'')
+'002136093000040'
+>>> format('36794000036')
+'000036794000036'
+"""
+
+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, removes surrounding
+    whitespace.
+    """
+    return clean(number, ' ')
+
+
+def validate(number):
+    """Check if the number is a valid Morocco ICE number.
+
+    This checks the length and formatting.
+    """
+    number = compact(number)
+    if len(number) != 15:
+        raise InvalidLength()
+    if not isdigits(number):
+        raise InvalidFormat()
+    return number
+
+
+def is_valid(number):
+    """Check if the number is a valid Morocco ICE number."""
+    try:
+        return bool(validate(number))
+    except ValidationError:
+        return False
+
+
+def format(number):
+    """Reformat the number to the standard presentation format."""
+    return compact(number).zfill(15)