first upload all files

Modules/Order/Http/Controllers/Admin/OrderEmailController.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Modules\Order\Http\Controllers\Admin;
+
+use Modules\Order\Entities\Order;
+use Modules\Checkout\Mail\Invoice;
+use Illuminate\Support\Facades\Mail;
+
+class OrderEmailController
+{
+    /**
+     * Store a newly created resource in storage.
+     *
+     * @param \Modules\Order\Entities\Order $order
+     * @return \Illuminate\Http\Response
+     */
+    public function store(Order $order)
+    {
+        Mail::to($order->customer_email)
+            ->send(new Invoice($order));
+
+        return back()->with('success', trans('order::messages.invoice_sent'));
+    }
+}