first upload all files

Modules/Product/Http/Controllers/ProductSearch.php

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+<?php
+
+namespace Modules\Product\Http\Controllers;
+
+use Illuminate\Support\Facades\DB;
+use Modules\Product\Entities\Product;
+use Modules\Category\Entities\Category;
+use Modules\Attribute\Entities\Attribute;
+use Modules\Product\Filters\ProductFilter;
+use Modules\Product\Events\ShowingProductList;
+
+trait ProductSearch
+{
+    /**
+     * Search products for the request.
+     *
+     * @param \Modules\Product\Entities\Product $model
+     * @param \Modules\Product\Filters\ProductFilter $productFilter
+     * @return \Illuminate\Http\Response
+     */
+    public function searchProducts(Product $model, ProductFilter $productFilter)
+    {
+        $productIds = [];
+
+        if (request()->filled('query')) {
+            $model = $model->search(request('query'));
+            $productIds = $model->keys();
+        }
+
+        $query = $model->filter($productFilter);
+
+        if (request()->filled('category')) {
+            $productIds = (clone $query)->select('products.id')->resetOrders()->pluck('id');
+        }
+
+        $products = $query->paginate(request('perPage', 30));
+
+        event(new ShowingProductList($products));
+
+        return response()->json([
+            'products' => $products,
+            'attributes' => $this->getAttributes($productIds),
+        ]);
+    }
+
+    private function getAttributes($productIds)
+    {
+        if (! request()->filled('category') || $this->filteringViaRootCategory()) {
+            return collect();
+        }
+
+        return Attribute::with('values')
+            ->where('is_filterable', true)
+            ->whereHas('categories', function ($query) use ($productIds) {
+                $query->whereIn('id', $this->getProductsCategoryIds($productIds));
+            })
+            ->get();
+    }
+
+    private function filteringViaRootCategory()
+    {
+        return Category::where('slug', request('category'))
+            ->firstOrNew([])
+            ->isRoot();
+    }
+
+    private function getProductsCategoryIds($productIds)
+    {
+        return DB::table('product_categories')
+            ->whereIn('product_id', $productIds)
+            ->distinct()
+            ->pluck('category_id');
+    }
+}