Porting Wordpress wpautop Function

wpautop.groovy

    //Ported from https://gist.github.com/remino/3036680 (thank you for that!)
    def wpautop(String content, boolean br) {
        def allhtmlblocks = "(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|option|form|map|area|blockquote|address|math|style|input|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)"

        if (content.trim().length() == 0) return ""
        content += "\n"

        content = content.replaceAll(/<br \/>\s*<br \/>/, "\n\n")
        content = content.replaceAll(/(<${allhtmlblocks}[^>]*>)/,{
            log.error("${it}")
            "\n${it[1]}"
        })
        content = content.replaceAll(/(<\/${allhtmlblocks}[^>]*>)/,{
            "${it[1]}\n"
        })
        content = content.replaceAll(/\r\n|\r/,"\n")

        if (content.indexOf('<object')) {
            content = content.replaceAll(/\s*<param([^>]*)>\s*/, {
                "<param${it[1]}>"
            })
            content = content.replaceAll(/\s*<\/embed>\s*/, "</embed>")
        }

        content = content.replaceAll(/\n\n+/, "\n\n")
        def crap = content.split(/\n\s*\n/)
        content = crap.inject("", { acc, ln ->
            if (ln != '') {
                acc += '<p>' + ln.replaceAll(/\n/, "") + "</p>\n"
            }
            acc
        })

        content = content.replaceAll(/<p>\s*<\/p>/, "")
        content = content.replaceAll(/<p>([^<]+)<\/(div|address|form)>/, { it -> "<p>${it[1]}</p></${it[2]}>" })
        content = content.replaceAll(/<p>\s*(<\/?${allhtmlblocks}[^>]*>)\s*<\/p>/, { it[1] })
        content = content.replaceAll(/<p>(<li.+?)<\/p>/, { it[1] })
        content = content.replaceAll(/<p><blockquote([^>]*)>/, { "<blockquote${it[1]}><p>" })
        content = content.replaceAll("</blockquote></p>", "</p></blockquote>")
        content = content.replaceAll(/<p>\s*(<\/?'+ allhtmlblocks + '[^>]*>)/, { it[1] })
        content = content.replaceAll(/(<\/?${allhtmlblocks}[^>]*>)\s*<\/p>/, { it[1] })

        if (br) {

            content.findAll(/<(script|style).*?<\/\\1>/,{
                    content.replaceAll(it, "\n<WPPreserveNewline />")
            })
            content = content.replaceAll(/\(?<!<br \/>\)\s*\n/, "<br />\n")
            content = content.replaceAll("<WPPreserveNewline />", "\n")

        }

        content = content.replaceAll(/'(<\/?${allhtmlblocks}[^>]*>)\s*<br \/>/, { it[1] })
        content = content.replaceAll(/<br \/>(\s*<\/?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)/, { it[1] })
        if (content.indexOf("<pre")) {
            content.findAll(/(<pre[^>]*>)(.*?)<\/pre>/, {
                it.replaceAll('<br />', '')
                it.replaceAll('<p>', "\n")
                it.replaceAll('</p>', '')
            })
        }

        content = content.replaceAll(/\n<\/p>$/, '</p>')
        return content
    }