From 872ca929349c843a16490ad15c33fa9444596a6c Mon Sep 17 00:00:00 2001
From: daaric <daaric@daaricovo.cz>
Date: Sun, 8 Feb 2026 19:00:38 +0100
Subject: [PATCH] initial commit, code generated by AI

---
 class/actions_czqrpay.class.php   | 28 +++++++++++++++++++++++++
 core/modules/modCzQrPay.class.php | 23 +++++++++++++++++++++
 lib/czqrpay.lib.php               | 34 +++++++++++++++++++++++++++++++
 3 files changed, 85 insertions(+)
 create mode 100644 class/actions_czqrpay.class.php
 create mode 100644 core/modules/modCzQrPay.class.php
 create mode 100644 lib/czqrpay.lib.php

diff --git a/class/actions_czqrpay.class.php b/class/actions_czqrpay.class.php
new file mode 100644
index 0000000..74bdf04
--- /dev/null
+++ b/class/actions_czqrpay.class.php
@@ -0,0 +1,28 @@
+<?php
+require_once DOL_DOCUMENT_ROOT.'/custom/czqrpay/lib/czqrpay.lib.php';
+
+class ActionsCzQrPay
+{
+    function addMoreActionsButtons($parameters, &$object, &$action, $hookmanager)
+    {
+        return 0;
+    }
+
+    function beforePDFCreation($parameters, &$object, &$action, $hookmanager)
+    {
+        global $db, $pdf;
+
+        if ($object->element != 'facture') return 0;
+
+        $account = czqrpay_get_bank_account($db);
+        if (!$account) return 0;
+
+        $vs = preg_replace('/\D/', '', $object->ref);
+        $msg = "Faktura ".$object->ref;
+        $spd = czqrpay_build_spd($account, $object->total_ttc, $vs, $msg);
+
+        $pdf->write2DBarcode($spd, 'QRCODE,M', 160, 230, 35, 35);
+
+        return 1;
+    }
+}
diff --git a/core/modules/modCzQrPay.class.php b/core/modules/modCzQrPay.class.php
new file mode 100644
index 0000000..ce68333
--- /dev/null
+++ b/core/modules/modCzQrPay.class.php
@@ -0,0 +1,23 @@
+<?php
+include_once DOL_DOCUMENT_ROOT .'/core/modules/DolibarrModules.class.php';
+
+class modCzQrPay extends DolibarrModules
+{
+    public function __construct($db)
+    {
+        $this->db = $db;
+        $this->numero = 104000;
+        $this->rights_class = 'czqrpay';
+
+        $this->family = "financial";
+        $this->name = 'czqrpay';
+        $this->description = "CZ QR Platba (SPD) for invoices and POS";
+        $this->version = '0.1';
+        $this->const_name = 'MAIN_MODULE_CZQRPAY';
+        $this->picto = 'payment';
+
+        $this->module_parts = array(
+            'hooks' => array('invoicecard','pdfgeneration','posreceipt')
+        );
+    }
+}
diff --git a/lib/czqrpay.lib.php b/lib/czqrpay.lib.php
new file mode 100644
index 0000000..f66d8b3
--- /dev/null
+++ b/lib/czqrpay.lib.php
@@ -0,0 +1,34 @@
+<?php
+
+function czqrpay_get_bank_account($db)
+{
+    $sql = "SELECT rowid, iban, account_number FROM ".MAIN_DB_PREFIX."bank_account";
+    $resql = $db->query($sql);
+
+    if ($resql) {
+        while ($obj = $db->fetch_object($resql)) {
+            if (!empty($obj->account_number)) return $obj->account_number;
+            if (!empty($obj->iban)) return czqrpay_iban_to_cz($obj->iban);
+        }
+    }
+    return null;
+}
+
+function czqrpay_iban_to_cz($iban)
+{
+    $iban = str_replace(' ', '', $iban);
+    if (substr($iban, 0, 2) !== 'CZ') return null;
+
+    $bank = substr($iban, 4, 4);
+    $prefix = ltrim(substr($iban, 8, 6), '0');
+    $account = ltrim(substr($iban, 14, 10), '0');
+
+    if ($prefix) return "$prefix-$account/$bank";
+    return "$account/$bank";
+}
+
+function czqrpay_build_spd($account, $amount, $vs, $msg)
+{
+    $amount = number_format($amount, 2, '.', '');
+    return "SPD*1.0*ACC:$account*AM:$amount*CC:CZK*X-VS:$vs*MSG:$msg";
+}