1 # -*- coding: utf-8 -*-
2 ##############################################################################
4 # OpenERP, Open Source Management Solution
5 # Copyright (C) 2004-2011 OpenERP SA (<http://openerp.com>)
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 ##############################################################################
30 logging.getLogger('base_vat').warning("VAT validation partially unavailable because the `vatnumber` Python library cannot be found. "
31 "Install it to support more countries, for example with `easy_install vatnumber`.")
34 from osv import osv, fields
35 from tools.misc import ustr
36 from tools.translate import _
42 'ch': 'CHE-123.456.788 TVA or CH TVA 123456', #Swiss by Yannick Vaucher @ Camptocamp
51 'fr': 'FR32123456789',
55 'hr': 'HR01234567896', # Croatia, contributed by Milan Tribuson
57 'it': 'IT12345670017',
60 'lv': 'LV41234567891',
62 'mx': 'MXABC123456T1B',
63 'nl': 'NL123456782B90',
68 'se': 'SE123456789701',
73 class res_partner(osv.osv):
74 _inherit = 'res.partner'
76 def _split_vat(self, vat):
77 vat_country, vat_number = vat[:2].lower(), vat[2:].replace(' ', '')
78 return vat_country, vat_number
80 def simple_vat_check(self, cr, uid, country_code, vat_number, context=None):
82 Check the VAT number depending of the country.
83 http://sima-pc.com/nif.php
85 check_func_name = 'check_vat_' + country_code
86 check_func = getattr(self, check_func_name, None) or \
87 getattr(vatnumber, check_func_name, None)
89 # No VAT validation available, default to check that the country code exists
90 res_country = self.pool.get('res.country')
91 return bool(res_country.search(cr, uid, [('code', '=ilike', country_code)], context=context))
92 return check_func(vat_number)
94 def vies_vat_check(self, cr, uid, country_code, vat_number, context=None):
96 # Validate against VAT Information Exchange System (VIES)
97 # see also http://ec.europa.eu/taxation_customs/vies/
98 return vatnumber.check_vies(country_code.upper()+vat_number)
100 # see http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl
101 # Fault code may contain INVALID_INPUT, SERVICE_UNAVAILABLE, MS_UNAVAILABLE,
102 # TIMEOUT or SERVER_BUSY. There is no way we can validate the input
103 # with VIES if any of these arise, including the first one (it means invalid
104 # country code or empty VAT number), so we fall back to the simple check.
105 return self.simple_vat_check(cr, uid, country_code, vat_number, context=context)
107 def button_check_vat(self, cr, uid, ids, context=None):
108 if not self.check_vat(cr, uid, ids, context=context):
109 msg = self._construct_constraint_msg(cr, uid, ids, context=context)
110 raise osv.except_osv(_('Error'), msg)
112 def check_vat(self, cr, uid, ids, context=None):
113 user_company = self.pool.get('res.users').browse(cr, uid, uid).company_id
114 if user_company.vat_check_vies:
115 # force full VIES online check
116 check_func = self.vies_vat_check
118 # quick and partial off-line checksum validation
119 check_func = self.simple_vat_check
120 for partner in self.browse(cr, uid, ids, context=context):
123 vat_country, vat_number = self._split_vat(partner.vat)
124 if not check_func(cr, uid, vat_country, vat_number, context=context):
128 def vat_change(self, cr, uid, ids, value, context=None):
129 return {'value': {'vat_subjected': bool(value)}}
132 'vat_subjected': fields.boolean('VAT Legal Statement', help="Check this box if the partner is subjected to the VAT. It will be used for the VAT legal statement.")
135 def _construct_constraint_msg(self, cr, uid, ids, context=None):
136 def default_vat_check(cn, vn):
137 # by default, a VAT number is valid if:
138 # it starts with 2 letters
139 # has more than 3 characters
140 return cn[0] in string.ascii_lowercase and cn[1] in string.ascii_lowercase
141 vat_country, vat_number = self._split_vat(self.browse(cr, uid, ids)[0].vat)
142 vat_no = "'CC##' (CC=Country Code, ##=VAT Number)"
143 if default_vat_check(vat_country, vat_number):
144 vat_no = _ref_vat[vat_country] if vat_country in _ref_vat else vat_no
145 return '\n' + _('This VAT number does not seem to be valid.\nNote: the expected format is %s') % vat_no
147 _constraints = [(check_vat, _construct_constraint_msg, ["vat"])]
150 __check_vat_ch_re1 = re.compile(r'(MWST|TVA|IVA)[0-9]{6}$')
151 __check_vat_ch_re2 = re.compile(r'E([0-9]{9}|-[0-9]{3}\.[0-9]{3}\.[0-9]{3})(MWST|TVA|IVA)$')
153 def check_vat_ch(self, vat):
155 Check Switzerland VAT number.
157 # VAT number in Switzerland will change between 2011 and 2013
158 # http://www.estv.admin.ch/mwst/themen/00154/00589/01107/index.html?lang=fr
159 # Old format is "TVA 123456" we will admit the user has to enter ch before the number
160 # Format will becomes such as "CHE-999.999.99C TVA"
161 # Both old and new format will be accepted till end of 2013
162 # Accepted format are: (spaces are ignored)
170 # CHE-###.###.### MWST
171 # CHE-###.###.### TVA
172 # CHE-###.###.### IVA
174 if self.__check_vat_ch_re1.match(vat):
176 match = self.__check_vat_ch_re2.match(vat)
178 # For new TVA numbers, do a mod11 check
179 num = filter(lambda s: s.isdigit(), match.group(1)) # get the digits only
180 factor = (5,4,3,2,7,6,5,4)
181 csum = sum([int(num[i]) * factor[i] for i in range(8)])
182 check = 11 - (csum % 11)
183 return check == int(num[8])
187 # Mexican VAT verification, contributed by <moylop260@hotmail.com>
188 # and Panos Christeas <p_christ@hol.gr>
189 __check_vat_mx_re = re.compile(r"(?P<primeras>[A-Za-z\xd1\xf1&]{3,4})" \
191 r"(?P<ano>[0-9]{2})(?P<mes>[01][0-9])(?P<dia>[0-3][0-9])" \
193 r"(?P<code>[A-Za-z0-9&\xd1\xf1]{3})$")
194 def check_vat_mx(self, vat):
195 ''' Mexican VAT verification
199 # we convert to 8-bit encoding, to help the regex parse only bytes
200 vat = ustr(vat).encode('iso8859-1')
201 m = self.__check_vat_mx_re.match(vat)
206 ano = int(m.group('ano'))
211 datetime.date(ano, int(m.group('mes')), int(m.group('dia')))
215 #Valid format and valid date
219 # Norway VAT validation, contributed by Rolv Råen (adEgo) <rora@adego.no>
220 def check_vat_no(self, vat):
222 Check Norway VAT number.See http://www.brreg.no/english/coordination/number.html
231 sum = (3 * int(vat[0])) + (2 * int(vat[1])) + \
232 (7 * int(vat[2])) + (6 * int(vat[3])) + \
233 (5 * int(vat[4])) + (4 * int(vat[5])) + \
234 (3 * int(vat[6])) + (2 * int(vat[7]))
236 check = 11 -(sum % 11)
240 # 10 is not a valid check digit for an organization number
242 return check == int(vat[8])
246 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: