115 lines
4.5 KiB
Python
115 lines
4.5 KiB
Python
# Copyright 2020-2023 Akretion France (http://www.akretion.com/)
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# @author: Alexis de Lattre <alexis.delattre@akretion.com>
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# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
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from odoo import api, fields, models, _
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from odoo.exceptions import UserError
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from stdnum.ean import calc_check_digit, is_valid
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from barcode import EAN13, EAN8
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from barcode.writer import ImageWriter, SVGWriter
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import base64
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import io
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class ProductTemplate(models.Model):
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_inherit = "product.template"
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must_print_barcode = fields.Boolean(
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string="Must Print Barcode",
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help="Enable that option for products for which you must "
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"print a barcode upon reception in stock.")
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def generate_barcode_from_product_template(self):
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self.ensure_one()
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if self.product_variant_count != 1:
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raise UserError(_(
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"You cannot call the method "
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"generate_barcode_from_product_template on product '%s' "
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"because it has %d variants and not just one.")
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% (self.display_name, self.product_variant_count))
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return self.product_variant_ids[0].generate_barcode_from_product_product()
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def print_zpl_barcode_from_product_template(self):
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self.ensure_one()
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if self.product_variant_count != 1:
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raise UserError(_(
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"You cannot call the method "
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"print_zpl_barcode_from_product_template on product '%s' "
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"because it has %d variants and not just one.")
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% (self.display_name, self.product_variant_count))
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action = self.env["ir.actions.actions"]._for_xml_id(
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'product_print_zpl_barcode.product_print_zpl_barcode_action')
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action['context'] = {
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'active_id': self.product_variant_ids[0].id,
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'active_model': 'product.product',
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}
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return action
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class ProductProduct(models.Model):
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_inherit = 'product.product'
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# Not useful for ZPL, but it is often useful to have a barcode image field
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barcode_image_png = fields.Binary(
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compute='_compute_barcode_image_png',
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string='PNG Barcode Image')
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barcode_image_svg = fields.Binary(
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compute='_compute_barcode_image_svg',
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string='SVG Barcode Image')
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def _get_barcode_image(self, img_format):
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self.ensure_one()
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barcode = self.barcode
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if not barcode:
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return False
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res = False
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if isinstance(barcode, str) and len(barcode) in (8, 13) and is_valid(barcode):
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barcode_obj = False
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if img_format == 'svg':
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writer = SVGWriter()
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elif img_format == 'png':
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writer = ImageWriter()
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else:
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return False
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if len(barcode) == 13:
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barcode_obj = EAN13(barcode, writer=writer, guardbar=True)
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elif len(barcode) == 8:
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barcode_obj = EAN8(barcode, writer=writer, guardbar=True)
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if barcode_obj:
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barcode_file = io.BytesIO()
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barcode_obj.write(barcode_file)
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barcode_file.seek(0)
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barcode_img = barcode_file.read()
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res = base64.b64encode(barcode_img)
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return res
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@api.depends('barcode')
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def _compute_barcode_image_svg(self):
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for product in self:
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product.barcode_image_svg = product._get_barcode_image('svg')
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@api.depends('barcode')
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def _compute_barcode_image_png(self):
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for product in self:
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product.barcode_image_png = product._get_barcode_image('png')
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def generate_barcode_from_product_product(self):
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self.ensure_one()
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if self.barcode:
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raise UserError(_(
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"The product '%s' already has a barcode.") % self.display_name)
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barcode_without_checksum = self.env['ir.sequence'].next_by_code(
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'private.product.barcode')
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if len(barcode_without_checksum) not in (7, 12):
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raise UserError(_(
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"The sequence 'private.product.barcode' is not properly "
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"configured. The generated sequence should have 7 digits "
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"(for EAN-8) or 12 digits (for EAN-13). "
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"It currently has %d digits." % len(barcode_without_checksum)))
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checksum = calc_check_digit(barcode_without_checksum)
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barcode = barcode_without_checksum + str(checksum)
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self.write({
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'barcode': barcode,
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'must_print_barcode': True,
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})
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