add refund and event logic

app/Http/Resources/Events/EventStudentChargeResource.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Http\Resources\Events;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class EventStudentChargeResource extends JsonResource
+{
+    public function toArray(Request $request): array
+    {
+        return [
+            'id' => (int) ($this['id'] ?? 0),
+            'name' => $this['name'] ?? '',
+            'charged' => (bool) ($this['charged'] ?? false),
+        ];
+    }
+}