first upload all files

Modules/Coupon/Entities/Concerns/SyncRelations.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Modules\Coupon\Entities\Concerns;
+
+trait SyncRelations
+{
+    protected function syncProducts($products)
+    {
+        $this->products()->sync(
+            $this->makeSyncList($products, ['exclude' => false])
+        );
+    }
+
+    protected function syncExcludeProducts($excludeProducts)
+    {
+        $this->excludeProducts()->sync(
+            $this->makeSyncList($excludeProducts, ['exclude' => true])
+        );
+    }
+
+    protected function syncCategories($categories)
+    {
+        $this->categories()->sync(
+            $this->makeSyncList($categories, ['exclude' => false])
+        );
+    }
+
+    protected function syncExcludeCategories($excludeCategories)
+    {
+        $this->excludeCategories()->sync(
+            $this->makeSyncList($excludeCategories, ['exclude' => true])
+        );
+    }
+
+    private function makeSyncList($items, $pivotData)
+    {
+        $pivotData = array_fill(0, count($items), $pivotData);
+
+        return array_combine($items, $pivotData);
+    }
+}