Which event is fired when I click the Publish button?

Question

I'm trying to catch the moment when a user hits the Publish button in the publish popup screen in the GUI. This is a GUI-driven event, which is important for me because I have some logic that is tied to the group memberships of the user who clicks the button. For this reason, I cannot use any of the events that are fired by the publisher service. For those events, the session user is always 'NT Authority\System'.

The following code does not seem to work, or rather, I cannot get it to start debugging. I have attached to the dllhost, dllhst3g and TcmServiceHost processes, but although the breakpoints become active, they are never hit.

[TcmExtension("PreventPublishing")]
public class PreventPublishing : TcmExtension
{
    public PreventPublishing()
    {
        EventSystem.Subscribe<RepositoryLocalObject, PublishingEventArgs>(OnItemPublish, EventPhases.Initiated);
    }

    private void OnItemPublish(RepositoryLocalObject item, PublishingEventArgs args, EventPhases phase)
    {
        User user = item.Session.User;
        if (user.IsSystemAdministrator)
            return;
        throw new PublisherException(new LocalizableMessage("Only system administrators are allowed to publish"));
    }
}

Any clues?

Answer 1

PublishingEventArgs is an abstract class which contains all the events related to publishing items. Try PublishEventArgs, which are related specifically to publishing an item.

BTW, why can't you use publisher events? You can get user who is publishing by looking at PublishTransaction.Creator property

Answer 2

My conclusion is that it is not possible to catch the event of 'user is actually clicking on the publish button' with the event system.

Alternatives are:

• Build a GUI extension which catches this event

• Catch the event inside the publisher, and use the PublishTransaction.Creator property to find the identity of the user who initiated the publish action.