Hi,

Is there a way to add a custome notification type to ContentPublishingNotification

I am working on the following code:

public class ContentHandler : INotificationHandler

    public ContentHandler(){}

    public void Handle(ContentPublishingNotification notification)
    {
        //Here we need to get the meta tags from the page content

       Boolean errorFound = false;
       var page = notification.PublishedEntities;
        foreach (var entity in page)
        {
           foreach(var p in entity.GetDirtyProperties())
            {
                string metaName = p.ToString().ToUpper();

                if (metaName == "METANAME" || metaName == "METADESCRIPTION" || metaName == "METAKEYWORDS")
                {
                    string proprtyName = p;
                    var propertyValue = entity.GetValue(proprtyName);

                    if (propertyValue == null)
                    {
                        errorFound = true;
                    }                       
                }
            }

            if (errorFound)
            {

                notification.CancelOperation(new EventMessage("Content published, Please check SEO fields",
                       "One or more meta tags are missing.",
                       EventMessageType.Warning));
            }

        }
    }
}}

Insted of using notification.CancelOperation I like to add my own notification type so that I can get the oroginal Page Piblished message and then run my meta tag message

But there dose not seem to be any documentation on how to do this in umbraco 10.