highlight menus on sub-pages (#1220)

src/Utils/MenuItemModel.php

@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Utils;
+
+use KevinPapst\AdminLTEBundle\Model\MenuItemModel as BaseMenuItemModel;
+
+class MenuItemModel extends BaseMenuItemModel
+{
+    private $childRoutes = [];
+
+    public function setChildRoutes(array $routes): MenuItemModel
+    {
+        $this->childRoutes = $routes;
+
+        return $this;
+    }
+
+    public function addChildRoute(string $route): MenuItemModel
+    {
+        $this->childRoutes[] = $route;
+
+        return $this;
+    }
+
+    public function isChildRoute(string $route): bool
+    {
+        return in_array($route, $this->childRoutes);
+    }
+}