add validator, optimizations

app/Http/Requests/Admin/Shop/StoreOfferPost.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Http\Requests\Admin\Shop;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class StoreOfferPost extends FormRequest
+{
+    public function authorize()
+    {
+        return true;
+    }
+
+    public function rules()
+    {
+        return [
+            'article_id' => 'required',
+            'variation_id' => 'required',
+            'tariff_id' => 'required',
+            'weight' => 'required',
+        ];
+    }
+}