adding counter on menu

app/Models/Menu.php

@@ -21,6 +21,7 @@ class Menu extends Model
         'name',
         'icon',
         'route_or_url',
+        'counter_handler',
         'position',
         'enable',
         'actives',
@@ -34,6 +35,13 @@ class Menu extends Model
         'permissions',
     ];
 
+    /**
+     * @var string[]
+     */
+    protected $appends = [
+        'counter',
+    ];
+
     /**
      * @return \Illuminate\Database\Eloquent\Relations\HasOne
      */
@@ -88,4 +96,14 @@ class Menu extends Model
             set: fn ($value) => is_array($value) || $value instanceof JsonSerializable || $value instanceof stdClass ? json_encode($value) : $value,
         );
     }
+
+    /**
+     * @return \Illuminate\Database\Eloquent\Casts\Attribute
+     */
+    public function counter() : Attribute
+    {
+        return Attribute::make(
+            get: fn () => $this->counter_handler ? new $this->counter_handler : null,
+        );
+    }
 }