JS replace urls in markdown

example.js

        plugins: [
            function (hook, vm) {
                hook.beforeEach(function (html) {
                    match_re = (src, re) => {
                        result = new Array()
                        while (1) {
                            match = re.exec(src)
                            if (match) {
                                if (result.filter(item => item[0] === match[0]) == 0)
                                    result.push(match)
                            } else
                                break
                        }
                    
                        return result
                    }

                    // patch all rel urls
                    patch1 = html
                    match_re(html, /\[([^\[\]]+)\]\((((?!http:\/\/|https:\/\/).+\.(?!md)[a-z]{2,})+)\)/g).forEach(match => {
                        file_path = match.slice(-1)[0]

                        old_url = match[0]
                        new_url = old_url.replace(
                            file_path,
                            "https://gitlab.com/{{ root_path }}/blob/master" + file_path
                        )

                        patch1 = patch1.replace(old_url, new_url)
                    })
                    // add incons for links
                    patch2 = patch1
                    match_re(patch1, /\[([^\[\]]+)\]\(([^)]+)\)/g).forEach(match => {
                        link = match[0]
                        if (match.slice(-1)[0].startsWith("/"))
                            icon = ""

                        else if (link.match("wiki"))
                            icon = "<i class=\"fab fa-wikipedia-w\"></i>"

                        else if (link.match("gitlab.com"))
                            icon = "<i class=\"fab fa-gitlab\"></i>"

                        else if (link.match("github.com"))
                            icon = "<i class=\"fab fa-github\"></i>"

                        else if (link.match("docs.google.com"))
                            icon = "<i class=\"fas fa-file-alt\"></i>"

                        else
                            icon = "<i class=\"fas fa-link\"></i>"

                        patch2 = patch2.replace(new RegExp(link.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&'), "g"), `${icon} ${link}`)
                    })

                    result = patch2
                    return result
                })
            }
        ]