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');
+    }
+}

Modules/Category/Http/Controllers/CategoryController.php

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+<?php
+
+namespace Modules\Category\Http\Controllers;
+
+use Modules\Category\Entities\Category;
+
+class CategoryController
+{
+    /**
+     * Display a listing of the resource.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function index()
+    {
+        return view('public.categories.index', [
+            'categories' => Category::all()->nest(),
+        ]);
+    }
+}

Modules/Category/Http/Controllers/CategoryProductController.php

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+<?php
+
+namespace Modules\Category\Http\Controllers;
+
+use Modules\Product\Entities\Product;
+use Modules\Category\Entities\Category;
+use Modules\Product\Filters\ProductFilter;
+use Modules\Product\Http\Controllers\ProductSearch;
+
+class CategoryProductController
+{
+    use ProductSearch;
+
+    /**
+     * Display a listing of the resource.
+     *
+     * @param string $slug
+     * @param \Modules\Product\Entities\Product $model
+     * @param \Modules\Product\Filters\ProductFilter $productFilter
+     * @return \Illuminate\Http\Response
+     */
+    public function index($slug, Product $model, ProductFilter $productFilter)
+    {
+        request()->merge(['category' => $slug]);
+
+        if (request()->expectsJson()) {
+            return $this->searchProducts($model, $productFilter);
+        }
+
+        $category = Category::findBySlug($slug);
+
+        return view('public.products.index', [
+            'categoryName' => $category->name,
+            'categoryBanner' => $category->banner->path,
+        ]);
+    }
+}

Modules/Category/Http/Requests/SaveCategoryRequest.php

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+<?php
+
+namespace Modules\Category\Http\Requests;
+
+use Illuminate\Validation\Rule;
+use Modules\Category\Entities\Category;
+use Modules\Core\Http\Requests\Request;
+
+class SaveCategoryRequest extends Request
+{
+    /**
+     * Available attributes.
+     *
+     * @var string
+     */
+    protected $availableAttributes = 'category::attributes';
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'name' => 'required',
+            'slug' => $this->getSlugRules(),
+            'is_active' => 'required|boolean',
+            'is_active' => 'required|boolean',
+        ];
+    }
+
+    private function getSlugRules()
+    {
+        $rules = $this->route()->getName() === 'admin.categories.update'
+            ? ['required']
+            : ['nullable'];
+
+        $slug = Category::withoutGlobalScope('active')->where('id', $this->id)->value('slug');
+
+        $rules[] = Rule::unique('categories', 'slug')->ignore($slug, 'slug');
+
+        return $rules;
+    }
+}

Modules/Category/Http/Responses/CategoryTreeResponse.php

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+<?php
+
+namespace Modules\Category\Http\Responses;
+
+use Illuminate\Contracts\Support\Responsable;
+
+class CategoryTreeResponse implements Responsable
+{
+    /**
+     * Categories collection.
+     *
+     * @var \Illuminate\Database\Eloquent\Collection
+     */
+    private $categories;
+
+    /**
+     * Create a new instance.
+     *
+     * @param \Illuminate\Database\Eloquent\Collection $categories
+     */
+    public function __construct($categories)
+    {
+        $this->categories = $categories;
+    }
+
+    /**
+     * Create an HTTP response that represents the object.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @return \Illuminate\Http\Response
+     */
+    public function toResponse($request)
+    {
+        return response()->json($this->transform());
+    }
+
+    /**
+     * Transform the categories.
+     *
+     * @return \Illuminate\Support\Collection
+     */
+    private function transform()
+    {
+        return $this->categories->map(function ($category) {
+            return [
+                'id' => $category->id,
+                'parent' => $category->parent_id ?: '#',
+                'text' => $category->name,
+                'data' => [
+                    'position' => $category->position,
+                ],
+            ];
+        });
+    }
+}