Add all files

app/Admin/Resources/OrderResource/Pages/CreateOrder.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Admin\Resources\OrderResource\Pages;
+
+use App\Admin\Resources\OrderResource;
+use App\Models\Invoice;
+use Filament\Resources\Pages\CreateRecord;
+
+class CreateOrder extends CreateRecord
+{
+    protected static string $resource = OrderResource::class;
+
+    protected function afterCreate(): void
+    {
+        $invoice = new Invoice([
+            'user_id' => $this->record->user_id,
+            'currency_code' => $this->record->currency_code,
+            'due_at' => now()->addDays(7),
+        ]);
+        $invoice->save();
+
+        foreach ($this->record->services as $service) {
+            $invoice->items()->create([
+                'description' => $service->description,
+                'price' => $service->price,
+                'quantity' => $service->quantity,
+                'reference_id' => $service->id,
+                'reference_type' => get_class($service),
+            ]);
+        }
+
+    }
+}