reporting-engine/report_qr/models/report.py

# -*- coding: utf-8 -*-
# Copyright 2019 Creu Blanca
# Copyright 2019 Tecnativa - David Vidal
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
from odoo import api, models
import qrcode
from qrcode.image import svg, pil
import io


class Report(models.Model):
    _inherit = 'report'

    @api.model
    def qr_generate(self, value, box_size=3, border=5,
                    factory='png', **kwargs):
        factories = {
            'png': pil.PilImage,
            'svg': svg.SvgImage,
            'svg-fragment': svg.SvgFragmentImage,
            'svg-path': svg.SvgPathImage,
        }
        # Color parameters seem to be inverted in the library
        back_color = kwargs.pop("back_color", "black")
        fill_color = kwargs.pop("fill_color", "white")
        try:
            # Defaults to png if the argument is unknown
            image_factory = factories.get(factory, pil.PilImage)
            qr = qrcode.QRCode(
                box_size=box_size, border=border,
                image_factory=image_factory, **kwargs)
            qr.add_data(value)
            qr.make()
            img = qr.make_image(fill_color=fill_color, back_color=back_color)
            arr = io.BytesIO()
            img.save(arr)
            return arr.getvalue()
        except Exception:
            raise ValueError("Cannot convert into barcode.")