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89 lines
2.2 KiB
89 lines
2.2 KiB
# -*- coding: utf-8 -*-
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import math
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import re
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from odoo import api, models
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class ProductAutoBarcode(models.Model):
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_inherit = 'product.product'
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@api.model
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def create(self, vals):
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res = super(ProductAutoBarcode, self).create(vals)
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ean = generate_ean(str(res.id))
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res.barcode = ean
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return res
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@api.multi
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def write(self, values):
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ean = generate_ean(str(self.product_tmpl_id.id))
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values['barcode'] = ean
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return super(ProductAutoBarcode, self).write(values)
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@api.multi
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def ean_checksum(eancode):
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"""returns the checksum of an ean string of length 13, returns -1 if
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the string has the wrong length"""
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if len(eancode) != 13:
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return -1
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oddsum = 0
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evensum = 0
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eanvalue = eancode
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reversevalue = eanvalue[::-1]
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finalean = reversevalue[1:]
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for i in range(len(finalean)):
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if i % 2 == 0:
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oddsum += int(finalean[i])
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else:
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evensum += int(finalean[i])
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total = (oddsum * 3) + evensum
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check = int(10 - math.ceil(total % 10.0)) % 10
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return check
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def check_ean(eancode):
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"""returns True if eancode is a valid ean13 string, or null"""
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if not eancode:
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return True
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if len(eancode) != 13:
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return False
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try:
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int(eancode)
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except:
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return False
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return ean_checksum(eancode) == int(eancode[-1])
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def generate_ean(ean):
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"""Creates and returns a valid ean13 from an invalid one"""
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if not ean:
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return "0000000000000"
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ean = re.sub("[A-Za-z]", "0", ean)
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ean = re.sub("[^0-9]", "", ean)
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ean = ean[:13]
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if len(ean) < 13:
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ean = ean + '0' * (13 - len(ean))
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return ean[:-1] + str(ean_checksum(ean))
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# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
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class ProductAutoBarcodeInherit(models.Model):
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_inherit = 'product.template'
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@api.model
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def create(self, vals):
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res = super(ProductAutoBarcodeInherit, self).create(vals)
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ean = generate_ean(str(res.id))
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res.barcode = ean
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return res
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@api.multi
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def write(self, values):
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ean = generate_ean(str(self.id))
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values['barcode'] = ean
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return super(ProductAutoBarcodeInherit, self).write(values)
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