[ADD] account_qr_code_emv

- This is a bridge module to provide support for EMV Merchant-Presented
QR-code generation for Payment System.
- Other accounting localisation module will override _get_merchant_account_info
method to construct the qr code parameters. This module will help creating the
crc16 check sum to append in the qr code vals.

Part-of: odoo/odoo#120050

addons/account_qr_code_emv/__init__.py

@@ -0,0 +1,3 @@
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import models

addons/account_qr_code_emv/__manifest__.py

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+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+{
+    'name': 'account_qr_code_emv',
+    'category': 'Accounting/Payment',
+    'version': '1.0',
+    'description': """
+        Bridge module addings support for EMV Merchant-Presented QR-code generation for Payment System.
+    """,
+    'author': 'Odoo SA',
+    'depends': ['account'],
+    'license': 'LGPL-3',
+}

addons/account_qr_code_emv/const.py

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+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+CURRENCY_MAPPING = {
+    'ARS': '032',
+    'AUD': '036',
+    'BHD': '048',
+    'KHR': '116',
+    'CAD': '124',
+    'LKR': '144',
+    'CNY': '156',
+    'HRK': '191',
+    'CZK': '203',
+    'DKK': '208',
+    'HKD': '344',
+    'HUF': '348',
+    'ISK': '352',
+    'INR': '356',
+    'ILS': '376',
+    'JPY': '392',
+    'KRW': '410',
+    'KWD': '414',
+    'MYR': '458',
+    'MUR': '480',
+    'MXN': '484',
+    'NPR': '524',
+    'NZD': '554',
+    'NOK': '578',
+    'QAR': '634',
+    'RUB': '643',
+    'SAR': '682',
+    'SGD': '702',
+    'ZAR': '710',
+    'SEK': '752',
+    'CHF': '756',
+    'THB': '764',
+    'AED': '784',
+    'TND': '788',
+    'GBP': '826',
+    'USD': '840',
+    'TWD': '901',
+    'RSD': '941',
+    'RON': '946',
+    'TRY': '949',
+    'XOF': '952',
+    'XPF': '953',
+    'BGN': '975',
+    'EUR': '978',
+    'UAH': '980',
+    'PLN': '985',
+    'BRL': '986',
+}

addons/account_qr_code_emv/models/__init__.py

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+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import res_bank

addons/account_qr_code_emv/models/res_bank.py

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+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import _, api, models
+
+from odoo.addons.account_qr_code_emv.const import CURRENCY_MAPPING
+
+
+class ResPartnerBank(models.Model):
+    _inherit = 'res.partner.bank'
+
+    # CRC16 calculation with polynomial 0x1021 and initial value 0xFFFF
+    def _get_crc16(self, data, poly=0x1021, init=0xFFFF):
+        crc = init
+        for byte in data:
+            crc = crc ^ (byte << 8)
+            for __ in range(8):
+                if crc & 0x8000:
+                    crc = (crc << 1) ^ poly
+                else:
+                    crc = crc << 1
+        return crc & 0xFFFF
+
+    def _get_merchant_account_info(self):
+        return False
+
+    def _get_qr_vals(self, qr_method, amount, currency, debtor_partner, free_communication, structured_communication):
+        if qr_method == 'emv_qr':
+            merchant_account_info = self._get_merchant_account_info()
+            currency_code = CURRENCY_MAPPING[currency.name]
+            merchant_name = self.partner_id.name and self.partner_id.name[:25] or 'NA'
+            merchant_city = self.partner_id.city and self.partner_id.city[:15] or ''
+
+            qr_code_vals = [
+                '000201',                                                           # Payload Format Indicator
+                '010212',                                                           # Dynamic QR Codes
+                f'26{len(merchant_account_info):02}{merchant_account_info}',        # Merchant Account Information
+                '52040000',                                                         # Merchant Category Code
+                f'5303{currency_code}',                                             # Transaction Currency
+                f'54{len(str(amount)):02}{amount}',                                 # Transaction Amount
+                f'5802{self.partner_id.country_code}',                              # Country Code
+                f'59{len(merchant_name):02}{merchant_name}',                        # Merchant Name
+                f'60{len(merchant_city):02}{merchant_city}',                        # Merchant City
+                '6304',                                                             # CRC16
+            ]
+            crc = self._get_crc16(bytes(''.join(qr_code_vals), 'utf-8'))
+            qr_code_vals.append(format(crc, '04x').upper())
+            return qr_code_vals
+        return super()._get_qr_vals(qr_method, amount, currency, debtor_partner, free_communication, structured_communication)
+
+    def _get_qr_code_generation_params(self, qr_method, amount, currency, debtor_partner, free_communication, structured_communication):
+        if qr_method == 'emv_qr':
+            return {
+                'barcode_type': 'QR',
+                'width': 128,
+                'height': 128,
+                'humanreadable': 1,
+                'value': ''.join(self._get_qr_vals(qr_method, amount, currency, debtor_partner, free_communication, structured_communication)),
+            }
+        return super()._get_qr_code_generation_params(qr_method, amount, currency, debtor_partner, free_communication, structured_communication)
+
+    def _check_for_qr_code_errors(self, qr_method, amount, currency, debtor_partner, free_communication, structured_communication):
+        if qr_method == 'emv_qr':
+            if not self._get_merchant_account_info():
+                return _("Missing Merchant Account Information.")
+            if not self.partner_id.city:
+                return _("Missing Merchant City.")
+        return super()._check_for_qr_code_errors(qr_method, amount, currency, debtor_partner, free_communication, structured_communication)
+
+    @api.model
+    def _get_available_qr_methods(self):
+        rslt = super()._get_available_qr_methods()
+        rslt.append(('emv_qr', _("EMV Merchant-Presented QR-code"), 30))
+        return rslt