FixRedlinks

$('#WikiHeader').append('<a class="wikia-button" onclick="this.innerHTML = \'Processing...\'; FixRedlinks();">Fix redlinks</a>');

function FixRedlinks() {
    $.getJSON('/api.php?action=query&prop=revisions&titles=' + wgPageName + '&rvprop=content&indexpageids=1&format=json', function(result) {
        var text = result.query.pages[result.query.pageids[0]].revisions[0]['*'];
        var redlinks = $('a.new');

        var ref = 0;
        while(text.indexOf('[[', ref) != -1) {
            if(text.indexOf(']]', text.indexOf('[[', ref)) != -1) {
                var open = text.indexOf('[[', ref);
                var pipe = text.indexOf('|', open);
                var close = text.indexOf(']]', open);
                if(text.indexOf('<br/>', open) != -1 && text.indexOf('<br/>', open) < close) {ref = open + 1; continue;}
                if(pipe != -1 && pipe < close) { //is [[page|display]]
                    if(pipe == close - 1) {
                        var title = text.substring(open + 2, pipe);
                        var display = title.substring(title.indexOf(':') + 1);
                    }
                    else {
                        var title = text.substring(open + 2, pipe);
                        var display = text.substring(pipe + 1, close);
                    }
                }
                else { //is [[page]]
                    var title = text.substring(open + 2, close);
                    var display = title;
                }
                if(!title) {ref = open + 1; continue;} //skip [[]] and [[|<anything>]]

                for(var i = 0; i < redlinks.length; i++) {
                    var utitle = title[0].toUpperCase() + title.substring(1);
                    if(redlinks[i].title.indexOf(' (page does not exist)')) {var redlink = redlinks[i].title.substring(0, redlinks[i].title.length - 22);}
                    else {var redlink = redlinks[i];}
                    if(utitle == redlink || utitle == ':' + redlink) {
                        if(pipe == close - 1) {var show = title;}
                        else {var show = display;}
                        text = text.substring(0, open) + show + text.substring(close + 2);
                        break;
                    }
                }
                ref = open + 2;
            }
            else {break;}
        }

        $.getJSON('/api.php?action=query&prop=info&titles=' + wgPageName + '&intoken=edit&indexpageids=1&format=json', function(result) {
            var token = result.query.pages[result.query.pageids[0]].edittoken;
            $.post('/api.php', {action: 'edit', title: wgPageName, text: text, summary: 'Fixing redlinks', token: token}, function() {window.location.reload();});
        });
    });
}