Html.java

package com.cellasoft.univrapp.utils;

import com.cellasoft.univrapp.Settings;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Html {
    private static final Pattern bodyPattern = Pattern.compile(
            "<body[^>]*?>([\\s\\S]*?)</body>", Pattern.CASE_INSENSITIVE);

    private static final Pattern fileExtnPtrn = Pattern
            .compile("([^\\s]+(\\.(?i)(txt|rtf|doc|docx|docm|odt|ppt|pptx|xlt|xltx|xltm|pps|ppsx|ods|pdf|xls|zip|rar|tar|7z|R))$)");

    public static String getBodyContent(String dirtyHtml) {
        Matcher matcher = bodyPattern.matcher(dirtyHtml);
        if (matcher.find()) {
            return matcher.group(1);
        }
        return null;
    }

    public static String toText(String html) {
        if (html == null)
            return html;
        return html.replaceAll("</?[^>]+>", "").trim();
    }

    public static String decode(String html) {
        if (html == null)
            return html;
        return html.replace("<", "<").replace(">", ">")
                .replace(""", "\"").replace("'", "'")
                .replace(" ", " ").replace("&", "&")
                .replace("—", "").replace("'", "'");
    }

    public static boolean validateFileExtn(String html) {
        Matcher matcher = fileExtnPtrn.matcher(html);
        return matcher.matches();
    }

    public static List<String> getAttachment(String html) {
        List<String> attachment = Lists.newArrayList();
        Document doc = Jsoup.parse(html);

        Elements files = doc.select("dl.docTab > dd > ul.formati > li > a");

        for (Element file : files) {
            if (file != null) {
                String path = Settings.getUniversity().domain
                        + file.attr("href");
                String text = decode(file.text().trim());
                String attach = "";
                int start = text.lastIndexOf("(");
                if (start > 0) {
                    String size = text.substring(start, text.length());
                    attach = "<a href=\"" + path + "\">"
                            + text.replace(size, "") + "</a></div>";
                    attach += "<br/><small>" + size + "</small></td>";
                } else {
                    attach = "<a href=\"" + path + "\">" + text + "</a></div>";
                }
                attach += "</td>";
                attachment.add(attach);

            }
        }

        return attachment;
    }

    public static String getFileNameToPath(String path) {
        int start = path.lastIndexOf("/") + 1;
        return path.substring(start);

    }

    public static String parserPage(String html) {
        String body = getBodyContent(html);

        Document doc = Jsoup.parse(body);

        try {
            Element article = doc.select("div.sezione").first();

            return article.html();
        } catch (Exception e) {
            return "";
        } finally {
            doc = null;
        }
    }

}