[NEW] lcc_wallet_qr: create add-on

lcc_wallet_qr/README.rst

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+=============
+lcc_wallet_qr
+=============
+
+Module to generate a QR code containing the wallet information
+It's part of Lokavaluto Project (https://lokavaluto.fr)
+
+Installation
+============
+
+Just install lcc_wallet_qr, all dependencies will be installed by default.
+
+Configuration
+=============
+
+No configuration needed on this addon.
+
+Usage
+=====
+
+To generate the QR code of a wallet, go on the form view of the wallet, anc click on the button "Generate QR". 
+You will be able to download a pdf page containing the QR code, and you will find the PNG image in the "QR code" notebook page.
+
+Known issues / Roadmap
+======================
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues
+<https://github.com/Lokavaluto/lokavaluto-addons/issues>`_. In case of trouble, please
+check there if your issue has already been reported. If you spotted it first,
+help us smashing it by providing a detailed and welcomed feedback.
+
+Credits
+=======
+
+Images
+------
+
+* Lokavaluto: `Icon <https://lokavaluto.fr/web/image/res.company/1/logo?unique=f3db262>`_.
+
+Contributors
+------------
+
+* Stéphan SAINLEGER <https://github.com/stephansainleger>
+* Nicolas JEUDY <https://github.com/njeudy>
+* Lokavaluto Teams
+
+Funders
+-------
+
+The development of this module has been financially supported by:
+
+* Lokavaluto (https://lokavaluto.fr)
+* Mycéliandre (https://myceliandre.fr)
+* Elabore (https://elabore.coop)
+
+Maintainer
+----------
+
+This module is maintained by LOKAVALUTO.
+
+LOKAVALUTO, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and ecosystem for local complementary currency organizations.

lcc_wallet_qr/__init__.py

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+# -*- coding: utf-8 -*-
+from . import models

lcc_wallet_qr/__manifest__.py

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+{
+    "name": "lcc_wallet_qr",
+    "summary": "Generation of a QR code for LCC numeric wallets",
+    "author": "Lokavaluto",
+    "website": "https://lokavaluto.fr",
+    "category": "Website",
+    "version": "12.0.1.0.0",
+    # any module necessary for this one to work correctly
+    "depends": [
+        "base",
+        "lcc_lokavaluto_app_connection",
+    ],
+    # always loaded
+    "data": [
+        "views/lcc_backend.xml",
+        "data/res_partner_backend_data.xml",
+    ],
+    # only loaded in demonstration mode
+    "demo": [],
+}

lcc_wallet_qr/data/res_partner_backend_data.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <data>
+        <record id="ir_cron_generate_missing_wallet_qr_codes" model="ir.cron">
+            <field name="name">Wallet: generate missing QR codes</field>
+            <field name="model_id" ref="lcc_lokavaluto_app_connection.model_res_partner_backend" />
+            <field name="state">code</field>
+            <field name="code">model._cron_generate_missing_qr()</field>
+            <field name="interval_type">days</field>
+            <field name="numbercall">-1</field>
+            <field name="active">0</field>
+        </record>
+    </data>
+</odoo>

lcc_wallet_qr/models/__init__.py

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+# -*- coding: utf-8 -*-
+from . import res_partner_backend

lcc_wallet_qr/models/res_partner_backend.py

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+# -*- coding: utf-8 -*-
+
+try:
+    import qrcode
+except ImportError:
+    qrcode = None
+try:
+    import base64
+except ImportError:
+    base64 = None
+from io import BytesIO
+
+from odoo import models, fields, api,_
+from odoo.exceptions import UserError
+
+
+class ResPartnerBackend(models.Model):
+    _inherit = "res.partner.backend"
+
+    qr = fields.Binary(string="Wallet QR code", store=True, copy=False)
+
+    @api.model
+    def create(self, vals):
+        res = super(ResPartnerBackend, self).create(vals)
+        res.generate_qr()
+        return res
+
+    def _get_qr_content(self):
+        self.ensure_one()
+        content = {
+            "rp": self.partner_id.id,
+            "rpb": self.name,
+        }
+        return content
+
+    def generate_qr(self):
+        if qrcode and base64:
+            for record in self:
+                qr = qrcode.QRCode(
+                    version=1,
+                    error_correction=qrcode.constants.ERROR_CORRECT_L,
+                    box_size=10,
+                    border=2,
+                )
+                qr_content = record._get_qr_content()
+
+                qr.add_data(qr_content)
+                qr.make(fit=True)
+
+                img = qr.make_image()
+                temp = BytesIO()
+                img.save(temp, format="PNG")
+                qr_image = base64.b64encode(temp.getvalue())
+                record.write(
+                    {
+                        "qr": qr_image,
+                    }
+                )
+        else:
+            raise UserError(
+                _(
+                    "Necessary requirements are not satisfied - Need qrcode and base64 Python libraries"
+                )
+            )
+
+    @api.model
+    def _cron_generate_missing_qr(self):
+        self.search([("qr", "=", False)]).generate_qr()

lcc_wallet_qr/views/lcc_backend.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <record id="lcc_backend_form_qr_view" model="ir.ui.view">
+        <field name="name">lcc.backend.qr.form.view</field>
+        <field name="model">res.partner.backend</field>
+        <field name="inherit_id" ref="lcc_lokavaluto_app_connection.lcc_backend_form_view" />
+        <field name="arch" type="xml">
+            <xpath expr="//group[@name='general_info']" position="before">
+                <button name="generate_qr" type="object" class="btn-box ml-3" icon="fa-qrcode">
+                    Generate new QR
+                </button>
+            </xpath>
+            <xpath expr="//field[@name='status']" position="after">
+                <field name="qr" readonly="True" />
+            </xpath>
+        </field>
+    </record>
+</odoo>