Hi,

I created a media service event handler for "saving" where I check the aspect ratio of an uploaded image.

Now what I want to do is prompt the user after uploading an image if the image is not the desired aspect ratio, if they still want to upload the file.

How do I do this, I have been trying to figure it out with umbraco.services.notificationsService but haven't found it yet.

The solution I'm looking for should be somewhat like the prompt you receive when you leave a node without saving the changes.