add nova

nova/src/Fields/HasDownload.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace Laravel\Nova\Fields;
+
+use Laravel\Nova\Http\Requests\NovaRequest;
+
+trait HasDownload
+{
+    /**
+     * The callback used to generate the download HTTP response.
+     *
+     * @var (callable(\Laravel\Nova\Http\Requests\NovaRequest, \Laravel\Nova\Resource, ?string, ?string):(mixed))|null
+     */
+    public $downloadResponseCallback;
+
+    /**
+     * Determine if the file is able to be downloaded.
+     *
+     * @var bool
+     */
+    public $downloadsAreEnabled = true;
+
+    /**
+     * Disable downloading the file.
+     *
+     * @return $this
+     */
+    public function disableDownload()
+    {
+        $this->downloadsAreEnabled = false;
+
+        return $this;
+    }
+
+    /**
+     * Specify the callback that should be used to create a download HTTP response.
+     *
+     * @param  callable(\Laravel\Nova\Http\Requests\NovaRequest, \Laravel\Nova\Resource, ?string, ?string):mixed  $downloadResponseCallback
+     * @return $this
+     */
+    public function download(callable $downloadResponseCallback)
+    {
+        $this->downloadResponseCallback = $downloadResponseCallback;
+
+        return $this;
+    }
+
+    /**
+     * Create an HTTP response to download the underlying field.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @param  \Laravel\Nova\Resource  $resource
+     * @return \Illuminate\Http\Response
+     */
+    public function toDownloadResponse(NovaRequest $request, $resource)
+    {
+        return call_user_func(
+            $this->downloadResponseCallback,
+            $request,
+            $resource->resource,
+            $this->getStorageDisk(),
+            $this->getStoragePath()
+        );
+    }
+}