Basic signup for events

app/Http/Controllers/GiroCodeGetController.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\EventParticipant;
+use App\Providers\GiroCodeProvider;
+use Illuminate\Http\Request;
+
+class GiroCodeGetController {
+    public function __invoke(string $participantToken, Request $request)
+    {
+        $participant = EventParticipant::where(['identifier' => $participantToken])->first();
+        if (null === $participant) {
+            return response()->json(['message' => 'Participant not found'], 404);
+        }
+
+        $amount = $participant->amount;
+        $amount->subtractAmount($participant->amount_paid);
+
+        $girocodeProvider = new GiroCodeProvider(
+            $participant->event()->first()->account_owner,
+            $participant->event()->first()->account_iban,
+            $participant->amount->getAmount(),
+            $participant->payment_purpose
+        );
+
+        return response($girocodeProvider->create(),    200,
+            ['Content-Type' => 'image/png']
+        );
+    }
+}