User:Euphoria/common.js

mw.loader.using(['mediawiki.util'])
    .then(function () {
        // Extract the username from the end of the contributions page URL
        var username;

        // Check if the current page is a user contributions page
        if (mw.config.get('wgCanonicalSpecialPageName') === 'Contributions') {
            // Extract username from the end of the contributions page URL
            var pageTitle = mw.config.get('wgRelevantPageName');
            var contributionsIndex = pageTitle.lastIndexOf('/Contributions/');
            if (contributionsIndex !== -1) {
                username = pageTitle.substring(contributionsIndex + '/Contributions/'.length);
            }
        } else {
            // Extract username from the regular page title
            username = mw.config.get('wgTitle').split('/')[0];
        }

        // Add the "SUL" link if the username is available
        if (username) {
            var sulLink = mw.util.addPortletLink(
                'p-cactions',
                mw.util.getUrl('Special:CentralAuth/' + username),
                'SUL',
                'ca-sul',
                'SUL',
                null,
                '#ca-sul'
            );
        }
    });