diff --git a/src/utils/FrontendFilesLoader.php b/src/utils/FrontendFilesLoader.php
index ce4eb1c3..404ccb7e 100644
--- a/src/utils/FrontendFilesLoader.php
+++ b/src/utils/FrontendFilesLoader.php
@@ -111,22 +111,24 @@ public function enqueue_inputmask_scripts()
         ');
     }
 
-    public function check_for_subscription_in_order() {
+    public function check_for_subscription_in_order() 
+    {
         global $post;
     
-        if ($post->post_type === 'shop_order' || $post->post_type === 'shop_subscription') {
+        if ($this->is_shop_order_or_subscription($post)) {
             $order = wc_get_order($post->ID);
             $has_subscription = false;
             $subscriptions_product = new WC_Subscriptions_Product();
 
-            foreach ($order->get_items() as $item_id => $item) {
+            foreach ($order->get_items() as $item) {
                 if ($subscriptions_product->is_subscription($item->get_product())) {
                     $has_subscription = true;
                     break;
                 }
             }
-    
-            wp_register_script('notification-js', plugins_url('/assets/js/notification.js', plugin_dir_path(__FILE__)), array('jquery'), VINDI_VERSION, true);
+
+            $dir_path = plugins_url('/assets/js/notification.js', plugin_dir_path(__FILE__));
+            wp_register_script('notification-js', $dir_path, array('jquery'), VINDI_VERSION, true);
             wp_enqueue_script('notification-js');
     
             wp_localize_script('notification-js', 'orderData', array(
@@ -134,4 +136,9 @@ public function check_for_subscription_in_order() {
             ));
         }
     }
+    
+    private function is_shop_order_or_subscription($post)
+    {
+        return $post->post_type === 'shop_order' || $post->post_type === 'shop_subscription';
+    }
 }