Moved bank transfer logic to special module

app/Http/Controllers/GiroCodeGetController.php

@@ -2,8 +2,8 @@
 
 namespace App\Http\Controllers;
 
+use App\EventPaymentModules\ProvidesGiroCode;
 use App\Models\EventParticipant;
-use App\Providers\GiroCodeProvider;
 use Illuminate\Http\Request;
 
 class GiroCodeGetController {
@@ -14,18 +14,16 @@ class GiroCodeGetController {
             return response()->json(['message' => 'Participant not found'], 404);
         }
 
-        $amount = $participant->amount;
-        $amount->subtractAmount($participant->amount_paid);
+        // Die GiroCode-Erzeugung gehört zum Zahlungsmodul; ohne diese Fähigkeit (z.B. Barzahlung) -> 404.
+        $module = $participant->paymentModule();
+        $girocode = $module instanceof ProvidesGiroCode
+            ? $module->giroCode($participant, $participant->paymentConfiguration())
+            : null;
 
-        $girocodeProvider = new GiroCodeProvider(
-            $participant->event()->first()->account_owner,
-            $participant->event()->first()->account_iban,
-            $participant->amount->getAmount(),
-            $participant->payment_purpose
-        );
+        if ($girocode === null) {
+            return response()->json(['message' => 'No giro code for this payment method'], 404);
+        }
 
-        return response($girocodeProvider->create(),    200,
-            ['Content-Type' => 'image/png']
-        );
+        return response($girocode, 200, ['Content-Type' => 'image/png']);
     }
 }