fixed problematic international QR code payments

Author: Lung

src/Payment/Payment.php

@@ -67,8 +67,13 @@ public function isPaymentOverdue(): bool
 
     public function getQrPaymentString(): string
     {
+        $swiftPart = '';
+        if ($this->swift !== '') {
+            $swiftPart = '+' . $this->swift;
+        }
+
         return
-            'SPD*1.0*ACC:' . $this->iban . '*'
+            'SPD*1.0*ACC:' . $this->iban . $swiftPart . '*'
             . 'AM:' . $this->price . '*'
             . 'CC:' . $this->mapDbCurrencyToIban($this->currency) . '*'
             . 'MSG:' . StringUtils::stripDiacritic($this->note) . '*'

tests/Unit/Payment/PaymentTest.php

@@ -56,7 +56,7 @@ public static function provideGetQrCode(): array
             ],
             'examplePayment' => [
                 $examplePayment1,
-                'SPD*1.0*ACC:CZ2806000000000168540115*AM:450*CC:CZK*MSG:PLATBA ZA ZBOZI*X-KS:0558*X-VS:1234567890'
+                'SPD*1.0*ACC:CZ2806000000000168540115+SWIFTCODE*AM:450*CC:CZK*MSG:PLATBA ZA ZBOZI*X-KS:0558*X-VS:1234567890'
             ],
         ];
     }