Add new StorageHelper and use it where it makes sense (#9276)

app/Helpers/StorageHelper.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Helpers;
+use Illuminate\Support\Facades\Storage;
+
+class StorageHelper
+{
+    static function downloader($filename, $disk = 'default') {
+        if($disk == 'default') {
+            $disk = config('filesystems.default');
+        }
+        switch(config("filesystems.disks.$disk.driver")) {
+            case 'local':
+                return response()->download(Storage::disk($disk)->path($filename)); //works for PRIVATE or public?!
+
+            case 's3':
+                return redirect()->away(Storage::disk($disk)->temporaryUrl($filename, now()->addMinutes(5))); //works for private or public, I guess?
+
+            default:
+                return Storage::disk($disk)->download($filename);
+        }
+    }
+}