add nova

nova/src/ResolvesLenses.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Laravel\Nova;
+
+use Laravel\Nova\Http\Requests\NovaRequest;
+
+trait ResolvesLenses
+{
+    /**
+     * Get the lenses that are available for the given request.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return \Illuminate\Support\Collection<int, \Laravel\Nova\Lenses\Lens>
+     */
+    public function availableLenses(NovaRequest $request)
+    {
+        return $this->resolveLenses($request)->filter->authorizedToSee($request)->values();
+    }
+
+    /**
+     * Get the lenses for the given request.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return \Illuminate\Support\Collection<int, \Laravel\Nova\Lenses\Lens>
+     */
+    public function resolveLenses(NovaRequest $request)
+    {
+        return collect(array_values($this->filter($this->lenses($request))));
+    }
+
+    /**
+     * Get the lenses available on the resource.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function lenses(NovaRequest $request)
+    {
+        return [];
+    }
+}