Add accise - the french number for excise

Author: cedk

stdnum/eu/excise.py

@@ -41,13 +41,25 @@
 
 from stdnum.eu.vat import MEMBER_STATES
 from stdnum.exceptions import *
-from stdnum.util import clean, get_soap_client
+from stdnum.util import clean, get_cc_module, get_soap_client
 
 
+_country_modules = dict()
+
 seed_wsdl = 'https://ec.europa.eu/taxation_customs/dds2/seed/services/excise/verification?wsdl'
 """The WSDL URL of the System for Exchange of Excise Data (SEED)."""
 
 
+def _get_cc_module(cc):
+    """Get the Excise number module based on the country code."""
+    cc = cc.lower()
+    if cc not in MEMBER_STATES:
+        raise InvalidComponent()
+    if cc not in _country_modules:
+        _country_modules[cc] = get_cc_module(cc, 'excise')
+    return _country_modules[cc]
+
+
 def compact(number):
     """Convert the number to the minimal representation. This strips the number
     of any valid separators and removes surrounding whitespace."""
@@ -59,10 +71,11 @@ def validate(number):
     """Check if the number is a valid Excise number."""
     number = clean(number, ' ').upper().strip()
     cc = number[:2]
-    if cc.lower() not in MEMBER_STATES:
-        raise InvalidComponent()
     if len(number) != 13:
         raise InvalidLength()
+    module = _get_cc_module(cc)
+    if module:
+        module.validate(number)
     return number
 
 

stdnum/fr/__init__.py

@@ -22,3 +22,5 @@
 
 # provide vat as an alias
 from stdnum.fr import tva as vat  # noqa: F401
+# provide excise as an alias
+from stdnum.fr import accise as excise

stdnum/fr/accise.py

@@ -0,0 +1,89 @@
+# accise.py - functions for handling French Accise numbers
+# coding: utf-8
+#
+# Copyright (C) 2023 Cédric Krier
+#
+# 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
+
+"""n° d'accise.
+
+The n° d'accise always start by FR0 following by the 2 ending digits of the
+year, 3 number of customs office, one letter for the type and an ordering
+number of 4 digits.
+
+>>> compact('FR0 23 004 N 9448')
+'FR023004N9448'
+>>> validate('FR023004N9448')
+'FR023004N9448'
+>>> validate('FR012907E0820')
+'FR012907E0820'
+
+>>> validate('FR012345')
+Traceback (most recent call last):
+    ...
+InvalidLength: ...
+>>> validate('FR0XX907E0820')
+Traceback (most recent call last):
+    ...
+InvalidFormat: ...
+>>> validate('FR012XXXE0820')
+Traceback (most recent call last):
+    ...
+InvalidFormat: ...
+>>> validate('FR012907A0820')
+Traceback (most recent call last):
+    ...
+InvalidFormat: ...
+>>> validate('FR012907EXXXX')
+Traceback (most recent call last):
+    ...
+InvalidFormat: ...
+"""
+
+from stdnum.exceptions import *
+from stdnum.util import clean, isdigits
+
+OPERATORS = set(['E', 'N', 'C', 'B'])
+
+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()
+    return number
+
+def validate(number):
+    number = clean(number, ' ').upper().strip()
+    code = number[:3]
+    if code != 'FR0':
+        raise InvalidFormat()
+    if len(number) != 13:
+        raise InvalidLength()
+    if not isdigits(number[3:5]):
+        raise InvalidFormat()
+    if not isdigits(number[5:8]):
+        raise InvalidFormat()
+    if number[8] not in OPERATORS:
+        raise InvalidFormat()
+    if not isdigits(number[9:12]):
+        raise InvalidFormat()
+    return number
+
+def is_valid(number):
+    """Check if the number is a valid accise number."""
+    try:
+        return bool(validate(number))
+    except ValidationError:
+        return False