WikiFunctions.Parse.Parsers.FixCategories C# (CSharp) Method

        public static string FixCategories(string articleText)
        {
            CategoryStart = @"[[" + (Variables.Namespaces.ContainsKey(Namespace.Category) ? Variables.Namespaces[Namespace.Category] : "Category:");

            // Performance: only need to apply changes to portion of article containing categories
            Match cq = WikiRegexes.CategoryQuick.Match(articleText);

            if (cq.Success)
            {
                // Allow some characters before category start in case of excess opening braces
                int cutoff = Math.Max(0, cq.Index-2);
                string cats = articleText.Substring(cutoff);
                string catsOriginal = cats;

                // fix extra brackets: three or more at end
                cats = Regex.Replace(cats, @"(" + Regex.Escape(CategoryStart) + @"[^\r\n\[\]{}<>]+\]\])\]+", "$1");
                // three or more at start
                cats = Regex.Replace(cats, @"\[+(?=" + Regex.Escape(CategoryStart) + @"[^\r\n\[\]{}<>]+\]\])", "");

                cats = WikiRegexes.LooseCategory.Replace(cats, LooseCategoryME);

                // Performance: return original text if no changes
                if (cats.Equals(catsOriginal))
                    return articleText;

                articleText = articleText.Substring(0, cutoff) + cats;
            }

            return articleText;
        }