User:Euphoria/common.js

mw.loader.using(['mediawiki.util'])
    .then(function () {
        // Extract the username from the current page title
        var pageTitle = mw.config.get('wgRelevantPageName');
        var username;

        // Check if the current page is a user contributions page
        if (mw.config.get('wgCanonicalSpecialPageName') === 'Contributions') {
            // Extract username from the contributions page using the relevant page name
            var userNamespaceIndex = pageTitle.indexOf(':');
            if (userNamespaceIndex !== -1 && userNamespaceIndex < pageTitle.length - 1) {
                username = pageTitle.substring(userNamespaceIndex + 1);
            }
        } else {
            // Extract username from the regular page title
            username = pageTitle.split('/')[0];
        }

        // Check if the current page is a user page, user talk page, or user contributions page, and add the "SUL" link
        var isUserPage = mw.config.get('wgNamespaceNumber') === 2; // User namespace
        var isTalkPage = mw.config.get('wgNamespaceNumber') === 3; // User talk namespace
        var isContributionsPage = mw.config.get('wgCanonicalSpecialPageName') === 'Contributions';

        if ((isUserPage || isTalkPage || isContributionsPage) && username) {
            var sulLink = mw.util.addPortletLink(
                'p-cactions',
                mw.util.getUrl('Special:CentralAuth/' + username),
                'SUL',
                'ca-sul',
                'SUL',
                null,
                '#ca-sul'
            );
        }
    });