<template id="sales_report" inherit_id="sale.report_saleorder_document">
    <xpath expr="//div[@id=’informations’]" position="replace">
        <div class="row mt-4 mb-4" id="informations">
            <div t-if="doc.client_order_ref" class="col-auto col-3 mw-100 mb-2" name="informations_reference">
                <strong>Your Reference:</strong>
                <p class="m-0" t-field="doc.client_order_ref"/>
            </div>
            <div t-if="doc.date_order" class="col-auto col-3 mw-100 mb-2" name="informations_date">
                <strong t-if="doc.state in [‘draft’, ‘sent’]">Quotation Date:</strong>
                <strong t-else="">Order Date:</strong>
                <p class="m-0" t-field="doc.date_order" t-options='{"widget": "date"}’/>
            </div>
            <div t-if="doc.validity_date and doc.state in [‘draft’, ‘sent’]" class="col-auto col-3 mw-100 mb-2" name="expiration_date">
                <strong>Expiration:</strong>
                <p class="m-0" t-field="doc.validity_date"/>
            </div>
            <div t-if="doc.user_id.name" class="col-auto col-3 mw-100 mb-2">
                <strong>Salesperson:</strong>
                <p class="m-0" t-field="doc.user_id"/>
            </div>
            <t t-set="qr_code_url" t-value="doc._get_qr_code_link_to_report()"/>
            <div class="col-2 align-items-center">
                <div>
                    <img t-att-src="’data:image/png;base64,%s’ % qr_code_url" style="width:150px;height:150px;"/>
                </div>
            </div>
        </div>
    </xpath>
</template>

from odoo import api, fields, models, _

import qrcode

import base64

from io import BytesIO
class SaleOrderInherit(models.Model):

    _inherit = ‘sale.order’
    def generate_qr(self, txt=”):

        qr_code = qrcode.QRCode(version=4, box_size=4, border=1)

        qr_code.add_data(txt)

        qr_code.make(fit=True)

        qr_img = qr_code.make_image()

        im = qr_img._img.convert("RGB")

        buffered = BytesIO()

        im.save(buffered, format="JPEG")

        img_str = base64.b64encode(buffered.getvalue()).decode(‘ascii’)

        return img_str
    def _get_qr_code_link_to_report(self):

        base_url = self.env[‘ir.config_parameter’].sudo().get_param(‘web.base.url’)

        current_id = self.id

        action_id = self.env.ref(‘sale.action_orders’)

        menu_id = self.env.ref(‘sale.sale_menu_root’)

        cids = self.env.company
        if self.state != ‘sent’:

            base_url = f"{base_url}/web#id={current_id}&cids={cids.id}&menu_id={menu_id.id}&action={action_id.id}&model=sale.order&view_type=form"

        else:

            base_url = f"{base_url}/sale-order?{self.name}"
        base64_qr = self.generate_qr(base_url)

        return base64_qr

from odoo import http

from odoo.http import request
class SaleOrderController(http.Controller):
    @http.route([‘/sale-order’], type=’http’, auth="user", website=True)

    def sale_order_state_controller(self, **kw):

        base_url = http.request.env[‘ir.config_parameter’].get_param(‘web.base.url’)

        query_string = http.request.httprequest.query_string
        sale_order = request.env[‘sale.order’].sudo().search([(‘name’, ‘=’, query_string)])

        sale_order.state = ‘sale’  # Update state to ‘Sales Order’
        current_id = sale_order.id

        action_id = request.env.ref(‘sale.action_orders’)

        menu_id = request.env.ref(‘sale.sale_menu_root’)

        cids = request.env.company
        values = {

            ‘so_name’: sale_order,

            ‘so_url’: f"{base_url}/web#id={current_id}&cids={cids.id}&menu_id={menu_id.id}&action={action_id.id}&model=sale.order&view_type=form"

        }

        return request.render("testmodule.controller_template", values)

<template id="controller_template">

    <t t-call="website.layout">

        <div id="wrap">

            <div class="oe_structure">

                <section data-snippet-id="text-block" class="mb16">

                    <div class="container">

                        <div class="row">

                            <div class="col-md-12 text-center mb16 message" data-snippet-id="colmd">

                                <style>

                                    .message { margin-top: 100px; }

                                    .button a {

                                        background-color: #714B67;

                                        padding: 0.5rem 2rem;

                                        border-radius: 10px;

                                        text-decoration: none;

                                        color: white;

                                    }

                                </style>

                                <p><strong>Your Sale Order </strong>

                                    <span style="color:red" t-esc="so_name.name"/>

                                    has been moved to <strong t-esc="so_name.state"></strong>

                                </p>

                                <p>Do you want to redirect to the Sale Order?</p>

                                <div class="button">

                                    <t t-set="url" t-value="so_url"/>

                                    <a t-attf-href="{{url}}">Yes</a>

                                </div>

                            </div>

                        </div>

                    </div>

                </section>

            </div>

        </div>

    </t>

</template>