add nova

nova/src/Http/Requests/DashboardMetricRequest.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Laravel\Nova\Http\Requests;
+
+use Laravel\Nova\Metrics\Metric;
+use Laravel\Nova\Nova;
+
+/**
+ * @property-read string $metric
+ */
+class DashboardMetricRequest extends NovaRequest
+{
+    /**
+     * Get the metric instance for the given request.
+     *
+     * @return \Laravel\Nova\Metrics\Metric
+     */
+    public function metric()
+    {
+        return $this->availableMetrics()->first(function ($metric) {
+            return $this->metric === $metric->uriKey();
+        }) ?: abort(404);
+    }
+
+    /**
+     * Get all of the possible metrics for the request.
+     *
+     * @return \Illuminate\Support\Collection
+     */
+    public function availableMetrics()
+    {
+        return Nova::allAvailableDashboardCards($this)->whereInstanceOf(Metric::class);
+    }
+}