first upload all files

Modules/Attribute/Admin/ProductTabsExtender.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace Modules\Attribute\Admin;
+
+use Modules\Admin\Ui\Tab;
+use Modules\Admin\Ui\Tabs;
+use Modules\Attribute\Entities\Attribute;
+use Modules\Attribute\Entities\AttributeSet;
+
+class ProductTabsExtender
+{
+    public function extend(Tabs $tabs)
+    {
+        $tabs->group('advanced_information')
+            ->add($this->attributes());
+    }
+
+    private function attributes()
+    {
+        if (! auth()->user()->hasAccess(['admin.attributes.index'])) {
+            return;
+        }
+
+        return tap(new Tab('attributes', trans('attribute::admin.tabs.product.attributes')), function (Tab $tab) {
+            $tab->weight(30);
+            $tab->fields(['attributes.*.attribute_id', 'attributes.*.values']);
+            $tab->view(function ($data) {
+                return view('attribute::admin.products.tabs.attributes', [
+                    'productAttributes' => $this->getProductAttributes($data['product']),
+                    'attributeSets' => $this->getAttributeSets(),
+                ]);
+            });
+        });
+    }
+
+    private function getProductAttributes($product)
+    {
+        $old = old('attributes');
+
+        if (is_null($old)) {
+            return $product->load('attributes')->attributes;
+        }
+
+        return $this->getOldAttributes($old);
+    }
+
+    public function getOldAttributes($old)
+    {
+        return Attribute::with(['values' => function ($query) use ($old) {
+            $query->whereIn('id', array_flatten(array_pluck($old, 'values')));
+        }])
+        ->whereIn('id', array_pluck($old, 'attribute_id'))
+        ->get();
+    }
+
+    private function getAttributeSets()
+    {
+        return AttributeSet::with('attributes.values')->get()->sortBy('name');
+    }
+}