EventListener as ScriptComponent not working

Hi!

I am trying to implement a custom EventListener to prevent restricted users from changing some specific properties.

I mostly used the documentation and the example on this page:
https://extensions.xwiki.org/xwiki/bin/view/Extension/Script%20Component/

I also had a look at several Script snippets, but couldn’t find a solution, why the Listener is not fired at all.

What I want to do

• If a document is updated, it should be checked if it is a user profile
• If the user is in one of the “RESTRICTED_GROUP”, it should reset some properties to a given value.

What I did:

• I installed the Script Component extension
• I added a ScriptComponentClass object to my FlamingoTheme page (since this is always loaded) with Language “groovy” and Scope “global”

I use this code, mainly from the examples with some changes

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;
import org.xwiki.bridge.event.DocumentUpdatingEvent;
import org.xwiki.observation.AbstractEventListener;
import org.xwiki.observation.event.Event;
import com.xpn.xwiki.XWikiContext;
import com.xpn.xwiki.doc.XWikiDocument;
import com.xpn.xwiki.objects.BaseObject;
import java.util.Arrays;
import java.util.List;

@Component
@Named("preventRestrictedUserChangesListener")
@Singleton
public class preventRestrictedUserChanges extends AbstractEventListener {

    static final List<String> RESTRICTED_GROUPS = Arrays.asList(
        "XWiki.GroupA", "XWiki.GroupB", "XWiki.GroupC", "XWiki.GroupD"
    );

    public preventRestrictedUserChanges() {
        super("preventRestrictedUserChangesListener", new DocumentUpdatingEvent());
    }

    @Override
    public void onEvent(Event event, Object source, Object data) {
        XWikiContext xcontext = (XWikiContext) data;
        XWikiDocument doc = (XWikiDocument) source;
        String currentUser = xcontext.getUser();
        
        boolean isRestrictedUser = RESTRICTED_GROUPS.stream().anyMatch(group ->
            xcontext.getWiki().getGroupService(xcontext).isMember(currentUser, group)
        );

        if (isRestrictedUser) {
            BaseObject userObj = doc.getXObject("XWiki.XWikiUsers");
            if (userObj != null) {
                userObj.set("displayHiddenDocuments", "0", xcontext);
                userObj.set("usertype", "Simple", xcontext);
            }
        }
    }
}

The problem is that it is not fired at all.

Anyone any idea what is wrong here?

Thanks in advance
Dalli

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