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76 lines
2.4 KiB
76 lines
2.4 KiB
# -*- coding: utf-8 -*-
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###############################################################################
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#
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# Cybrosys Technologies Pvt. Ltd.
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#
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# Copyright (C) 2024-TODAY Cybrosys Technologies(<https://www.cybrosys.com>)
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# Author: Cybrosys Techno Solutions (odoo@cybrosys.com)
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#
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# You can modify it under the terms of the GNU AFFERO
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# GENERAL PUBLIC LICENSE (AGPL v3), Version 3.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU AFFERO GENERAL PUBLIC LICENSE (AGPL v3) for more details.
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#
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# You should have received a copy of the GNU AFFERO GENERAL PUBLIC LICENSE
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# (AGPL v3) along with this program.
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# If not, see <http://www.gnu.org/licenses/>.
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#
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###############################################################################
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import math
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from odoo import api, models
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class ProductProduct(models.Model):
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"""Inherit product_product model for adding EAN13 Standard Barcode"""
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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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"""Function to add EAN13 Standard barcode at the time
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create new product"""
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res = super(ProductProduct, self).create(vals)
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ean = generate_ean(str(res.id))
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res.barcode = '21' + ean[2:]
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return res
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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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odd_sum = 0
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even_sum = 0
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for rec in range(len(eancode[::-1][1:])):
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if rec % 2 == 0:
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odd_sum += int(eancode[::-1][1:][rec])
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else:
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even_sum += int(eancode[::-1][1:][rec])
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total = (odd_sum * 3) + even_sum
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return int(10 - math.ceil(total % 10.0)) % 10
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def check_ean(eancode):
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"""Returns True if ean code 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)
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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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product_identifier = '00000000000' + ean
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ean = product_identifier[-11:]
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check_number = check_ean(ean + '00')
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return f'{ean}0{check_number}'
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