Initial import from ash-technology/l10n_cz_extra

Czech QR Payment (SPAYD) module for Odoo 19
- Generates Czech standard QR codes for invoices
- Compatible with all major Czech banking apps

Cloned from: https://github.com/ash-technology/l10n_cz_extra

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

models/__init__.py

@@ -0,0 +1 @@
+from . import account_move

models/account_move.py

@@ -0,0 +1,76 @@
+import qrcode
+import base64
+import io
+from odoo import models, api
+
+class AccountMove(models.Model):
+    _inherit = 'account.move'
+
+    def get_cz_qr_code_base64(self):
+        """ Returns Base64 PNG image for the invoice PDF """
+        self.ensure_one()
+        if self.currency_id.name != 'CZK':
+            return False
+
+        # Find bank: 1. Matching CZK, 2. No currency set (default)
+        bank = self.company_id.partner_id.bank_ids.filtered(lambda b: b.currency_id == self.currency_id)[:1]
+        if not bank:
+            bank = self.company_id.partner_id.bank_ids.filtered(lambda b: not b.currency_id)[:1]
+        
+        if not bank or not bank.acc_number:
+            return False
+
+        # Build SPAYD string
+        iban = self.cz_to_iban(bank.acc_number)
+        amount = '%.2f' % self.amount_residual
+        vs = ''.join(filter(str.isdigit, self.payment_reference or ''))[-10:]
+        
+        spayd = f"SPD*1.0*ACC:{iban}*AM:{amount}*CC:CZK*X-VS:{vs}"
+
+        # Generate QR Image
+        qr = qrcode.make(spayd)
+        buf = io.BytesIO()
+        qr.save(buf, format="PNG")
+        return base64.b64encode(buf.getvalue()).decode('utf-8')
+
+    def cz_to_iban(self, acc_number):
+        """
+        Converts '123-456/0800' or '456/0800' to a valid CZ IBAN.
+        """
+        if not acc_number:
+            return ""
+        
+        # Clean the input
+        clean_acc = acc_number.replace(" ", "")
+        
+        # If already an IBAN, return it
+        if clean_acc.upper().startswith('CZ'):
+            return clean_acc.upper()
+    
+        try:
+            # Split into [prefix-main, bank_code]
+            parts = clean_acc.split('/')
+            if len(parts) != 2:
+                return clean_acc # Fallback
+                
+            bank_code = parts[1]
+            account_parts = parts[0].split('-')
+            
+            if len(account_parts) == 2:
+                prefix = account_parts[0].zfill(6)
+                main = account_parts[1].zfill(10)
+            else:
+                prefix = "000000"
+                main = account_parts[0].zfill(10)
+    
+            # 1. Start with Bank Code + Prefix + Main + Country Number (CZ=12, 35=Z) + 00
+            # Czech Republic code is 123500 (12 for C, 35 for Z)
+            check_string = f"{bank_code}{prefix}{main}123500"
+            
+            # 2. Calculate checksum
+            checksum = 98 - (int(check_string) % 97)
+            checksum_str = str(checksum).zfill(2)
+            
+            return f"CZ{checksum_str}{bank_code}{prefix}{main}"
+        except Exception:
+            return clean_acc