first upload all files

Modules/Category/Http/Controllers/Admin/CategoryController.php

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+<?php
+
+namespace Modules\Category\Http\Controllers\Admin;
+
+use Modules\Category\Entities\Category;
+use Modules\Admin\Traits\HasCrudActions;
+use Modules\Category\Http\Requests\SaveCategoryRequest;
+
+class CategoryController
+{
+    use HasCrudActions;
+
+    /**
+     * Model for the resource.
+     *
+     * @var string
+     */
+    protected $model = Category::class;
+
+    /**
+     * Label of the resource.
+     *
+     * @var string
+     */
+    protected $label = 'category::categories.category';
+
+    /**
+     * View path of the resource.
+     *
+     * @var string
+     */
+    protected $viewPath = 'category::admin.categories';
+
+    /**
+     * Form requests for the resource.
+     *
+     * @var array|string
+     */
+    protected $validation = SaveCategoryRequest::class;
+
+    /**
+     * Display the specified resource.
+     *
+     * @param int $id
+     * @return \Illuminate\Http\Response
+     */
+    public function show($id)
+    {
+        return Category::with('files')->withoutGlobalScope('active')->find($id);
+    }
+
+    /**
+     * Destroy resources by given ids.
+     *
+     * @param int $id
+     * @return \Illuminate\Http\Response
+     */
+    public function destroy($id)
+    {
+        Category::withoutGlobalScope('active')
+            ->findOrFail($id)
+            ->delete();
+
+        return back()->withSuccess(trans('admin::messages.resource_deleted', ['resource' => $this->getLabel()]));
+    }
+}

Modules/Category/Http/Controllers/Admin/CategoryTreeController.php

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+<?php
+
+namespace Modules\Category\Http\Controllers\Admin;
+
+use Modules\Category\Entities\Category;
+use Modules\Category\Services\CategoryTreeUpdater;
+use Modules\Category\Http\Responses\CategoryTreeResponse;
+
+class CategoryTreeController
+{
+    /**
+     * Display category tree in json.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function index()
+    {
+        $categories = Category::withoutGlobalScope('active')
+            ->orderByRaw('-position DESC')
+            ->get();
+
+        return new CategoryTreeResponse($categories);
+    }
+
+    /**
+     * Update category tree in storage.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function update()
+    {
+        CategoryTreeUpdater::update(request('category_tree'));
+
+        return trans('category::messages.category_order_saved');
+    }
+}