add nova

nova/src/Tool.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Laravel\Nova;
+
+use Illuminate\Http\Request;
+
+abstract class Tool
+{
+    use AuthorizedToSee;
+    use Makeable;
+    use ProxiesCanSeeToGate;
+
+    /**
+     * Create a new Tool.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        //
+    }
+
+    /**
+     * 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);
+    }
+
+    /**
+     * Perform any tasks that need to happen on tool registration.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        //
+    }
+
+    /**
+     * Build the menu that renders the navigation links for the tool.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return mixed
+     */
+    abstract public function menu(Request $request);
+}