add nova

nova/src/Element.php

@@ -0,0 +1,89 @@
+<?php
+
+namespace Laravel\Nova;
+
+use Illuminate\Http\Request;
+use JsonSerializable;
+
+/**
+ * @method static static make(string|null $component = null)
+ */
+abstract class Element implements JsonSerializable
+{
+    use AuthorizedToSee;
+    use Makeable;
+    use Metable;
+    use ProxiesCanSeeToGate;
+
+    /**
+     * The element's component.
+     *
+     * @var string
+     */
+    public $component;
+
+    /**
+     * Indicates if the element is only shown on the detail screen.
+     *
+     * @var bool
+     */
+    public $onlyOnDetail = false;
+
+    /**
+     * Create a new element.
+     *
+     * @param  string|null  $component
+     * @return void
+     */
+    public function __construct($component = null)
+    {
+        $this->component = $component ?? $this->component;
+    }
+
+    /**
+     * Determine if the element should be displayed for the given request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return bool
+     */
+    public function authorize(Request $request)
+    {
+        return $this->authorizedToSee($request);
+    }
+
+    /**
+     * Get the component name for the element.
+     *
+     * @return string
+     */
+    public function component()
+    {
+        return $this->component;
+    }
+
+    /**
+     * Specify that the element should only be shown on the detail view.
+     *
+     * @return $this
+     */
+    public function onlyOnDetail()
+    {
+        $this->onlyOnDetail = true;
+
+        return $this;
+    }
+
+    /**
+     * Prepare the element for JSON serialization.
+     *
+     * @return array<string, mixed>
+     */
+    public function jsonSerialize(): array
+    {
+        return array_merge([
+            'component' => $this->component(),
+            'prefixComponent' => false,
+            'onlyOnDetail' => $this->onlyOnDetail,
+        ], $this->meta());
+    }
+}