Basic attachment download function.

app/Helpers/Attachments/AttachmentHelperInterface.php

@@ -2,6 +2,7 @@
 
 namespace FireflyIII\Helpers\Attachments;
 
+use FireflyIII\Models\Attachment;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Support\MessageBag;
 
@@ -30,4 +31,11 @@ interface AttachmentHelperInterface
      */
     public function getMessages();
 
+    /**
+     * @param Attachment $attachment
+     *
+     * @return mixed
+     */
+    public function getAttachmentLocation(Attachment $attachment);
+
 }