1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
# -*- coding: utf-8 -*-
##############################################################################
#
# Product GTIN module for Odoo
# Copyright (C) 2004-2011 Tiny SPRL (<http://tiny.be>).
# Copyright (C) 2010-2011 Camptocamp (<http://www.camptocamp.at>)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
import logging
_logger = logging.getLogger(__name__)
from openerp.osv import orm, fields
import operator
CONSTRAINT_MESSAGE = 'Error: Invalid EAN/GTIN code'
HELP_MESSAGE = ("EAN8 EAN13 UPC JPC GTIN \n"
"http://en.wikipedia.org/wiki/Global_Trade_Item_Number")
def is_pair(x):
return not x % 2
def check_ean8(eancode):
"""Check if the given ean code answer ean8 requirements
For more details: http://en.wikipedia.org/wiki/EAN-8
:param eancode: string, ean-8 code
:return: boolean
"""
if not eancode or not eancode.isdigit():
return False
if not len(eancode) == 8:
_logger.warn('Ean8 code has to have a length of 8 characters.')
return False
sum = 0
ean_len = int(len(eancode))
for i in range(ean_len-1):
if is_pair(i):
sum += 3 * int(eancode[i])
else:
sum += int(eancode[i])
check = 10 - operator.mod(sum, 10)
if check == 10:
check = 0
return check == int(eancode[-1])
def check_upc(upccode):
"""Check if the given code answers upc requirements
For more details:
http://en.wikipedia.org/wiki/Universal_Product_Code
:param upccode: string, upc code
:return: bool
"""
if not upccode or not upccode.isdigit():
return False
if not len(upccode) == 12:
_logger.warn('UPC code has to have a length of 12 characters.')
return False
sum_pair = 0
ean_len = int(len(upccode))
for i in range(ean_len-1):
if is_pair(i):
sum_pair += int(upccode[i])
sum = sum_pair * 3
for i in range(ean_len-1):
if not is_pair(i):
sum += int(upccode[i])
check = ((sum/10 + 1) * 10) - sum
return check == int(upccode[-1])
def check_ean13(eancode):
"""Check if the given ean code answer ean13 requirements
For more details:
http://en.wikipedia.org/wiki/International_Article_Number_%28EAN%29
:param eancode: string, ean-13 code
:return: boolean
"""
if not eancode or not eancode.isdigit():
return False
if not len(eancode) == 13:
_logger.warn('Ean13 code has to have a length of 13 characters.')
return False
sum = 0
ean_len = int(len(eancode))
for i in range(ean_len-1):
pos = int(ean_len-2-i)
if is_pair(i):
sum += 3 * int(eancode[pos])
else:
sum += int(eancode[pos])
check = 10 - operator.mod(sum, 10)
if check == 10:
check = 0
return check == int(eancode[-1])
def check_ean11(eancode):
pass
def check_gtin14(eancode):
pass
DICT_CHECK_EAN = {8: check_ean8,
11: check_ean11,
12: check_upc,
13: check_ean13,
14: check_gtin14,
}
def check_ean(eancode):
if not eancode:
return True
if not len(eancode) in DICT_CHECK_EAN:
return False
try:
int(eancode)
except:
return False
return DICT_CHECK_EAN[len(eancode)](eancode)
class product_product(orm.Model):
_inherit = "product.product"
def _check_ean_key(self, cr, uid, ids):
for rec in self.browse(cr, uid, ids):
if not check_ean(rec.ean13):
return False
return True
_columns = {
'ean13': fields.char(
'EAN/GTIN', size=14,
help="Code for %s" % HELP_MESSAGE),
}
_constraints = [(_check_ean_key, CONSTRAINT_MESSAGE, ['ean13'])]
class product_packaging(orm.Model):
_inherit = "product.packaging"
def _check_ean_key(self, cr, uid, ids):
for rec in self.browse(cr, uid, ids):
if not check_ean(rec.ean):
return False
return True
_columns = {
'ean': fields.char(
'EAN', size=14,
help='Barcode number for %s' % HELP_MESSAGE),
}
_constraints = [(_check_ean_key, CONSTRAINT_MESSAGE, ['ean'])]
class res_partner(orm.Model):
_inherit = "res.partner"
def _check_ean_key(self, cr, uid, ids):
for rec in self.browse(cr, uid, ids):
if not check_ean(rec.ean13):
return False
return True
_columns = {
'ean13': fields.char(
'EAN', size=14,
help="Code for %s" % HELP_MESSAGE),
}
_constraints = [(_check_ean_key, CONSTRAINT_MESSAGE, ['ean13'])]