add nova

nova/src/Menu/MenuGroup.php

@@ -0,0 +1,84 @@
+<?php
+
+namespace Laravel\Nova\Menu;
+
+use Illuminate\Support\Traits\Macroable;
+use Laravel\Nova\AuthorizedToSee;
+use Laravel\Nova\Fields\Collapsable;
+use Laravel\Nova\Http\Requests\NovaRequest;
+use Laravel\Nova\Makeable;
+
+/**
+ * @method static static make(string $name, array $items = [])
+ */
+class MenuGroup implements \JsonSerializable
+{
+    use AuthorizedToSee;
+    use Collapsable;
+    use Macroable;
+    use Makeable;
+
+    /**
+     * The menu's component.
+     *
+     * @var string
+     */
+    public $component = 'menu-group';
+
+    /**
+     * The menu's name.
+     *
+     * @var string
+     */
+    public $name;
+
+    /**
+     * The menu's items.
+     *
+     * @var \Laravel\Nova\Menu\MenuCollection
+     */
+    public $items;
+
+    /**
+     * Construct a new Menu Group instance.
+     *
+     * @param  string  $name
+     * @param  array  $items
+     */
+    public function __construct($name, $items = [])
+    {
+        $this->name = $name;
+        $this->items = new MenuCollection($items);
+    }
+
+    /**
+     * Get the menu's unique key.
+     *
+     * @return string
+     */
+    public function key()
+    {
+        return md5($this->name.$this->items->reduce(function ($carry, $item) {
+            return $carry.'-'.$item->name;
+        }, ''));
+    }
+
+    /**
+     * Prepare the menu for JSON serialization.
+     *
+     * @return array<string, mixed>
+     */
+    public function jsonSerialize(): array
+    {
+        $request = app(NovaRequest::class);
+
+        return [
+            'component' => $this->component,
+            'name' => $this->name,
+            'items' => $this->items->authorized($request)->withoutEmptyItems()->all(),
+            'collapsable' => $this->collapsable,
+            'collapsedByDefault' => $this->collapsedByDefault,
+            'key' => $this->key(),
+        ];
+    }
+}