package com.easyjf.util;

import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.regex.*;
import com.easyjf.util.regx.UBBFilter;

/**
 * 
 * <p>
 * Title:Html文本處理的簡單工具
 * </p>
 * <p>
 * Description:主要處理html文本,處理正則表達式等
 * </p>
 * <p>
 * Copyright: Copyright (c) 2005
 * </p>
 * <p>
 * Company: www.easyjf.com
 * </p>
 * 
 * @author 蔡世友
 * @version 1.0
 */
public class HtmlUtil {
	private static final HtmlUtil util = new HtmlUtil();

	public static HtmlUtil getInstance() {
		return util;
	}

	public static String addBr(String Content) {
		if (Content == null)
			return null;
		String makeContent = Content.replaceAll("\\n", "<br>");
		/*
		 * new String();
		 * 
		 * StringTokenizer strToken = new StringTokenizer(Content, "\n"); while
		 * (strToken.hasMoreTokens()) { makeContent = makeContent + "<br>" +
		 * strToken.nextToken(); }
		 */
		return makeContent;
	}

	/**
	 * 使HTML的標簽失去作用
	 * 
	 * @param input
	 *            被操作的字符串
	 * @return String
	 */
	public static final String escapeHTMLTag(String input) {
		if (input == null) {
			input = "";
			return input;
		}
		input = input.trim().replaceAll("&", "&amp;");
		input = input.trim().replaceAll("<", "&lt;");
		input = input.trim().replaceAll(">", "&gt;");
		input = input.trim().replaceAll("\t", "    ");
		input = input.trim().replaceAll("\r\n", "\n");
		input = input.trim().replaceAll("\n", "<br>");
		input = input.trim().replaceAll("  ", " &nbsp;");
		input = input.trim().replaceAll("'", "&#39;");
		input = input.trim().replaceAll("\\\\", "&#92;");
		return input;
	}

	public static String getUBB2HTML(String txt) {
		if (txt != null) {
			UBBFilter af = new UBBFilter(txt);
			txt = af.getFilteredStr();
		}
		return txt;
	}

	public static String ubbPattern(String str, String cp, String mc) {

		// str 準備對其操作的字符串，cp匹配的內容，mc準備替換成的內容
		String txt = new String();
		txt = str;
		if (str != null && !str.equals("")) {
			txt = str;
			Pattern p = Pattern.compile(cp, 2); // 參數2表示大小寫不區分
			Matcher m = p.matcher(txt);
			StringBuffer sb = new StringBuffer();
			int i = 0;
			boolean result = m.find();
			// System.out.print(cp);
			// 使用循環將句子里所有匹配的內容找出并替換再將內容加到sb里
			while (result) {
				i++;
				m.appendReplacement(sb, mc);
				// 繼續查找下一個匹配對象
				result = m.find();
			}
			// 最后調用appendTail()方法將最后一次匹配后的剩余字符串加到sb里；
			m.appendTail(sb);
			txt = String.valueOf(sb);
		} else {
			txt = "";
		}

		return txt;
	}

	public static String ubbEncoder(String str) {

		// str = ubbPattern(str,"\\[b\\](.*?)\\[/b\\]","<strong>$1</strong>");
		// //粗體字

		// str = ubbPattern(str, "\\[color=(.*?)\\](.*?)\\[/color\\]","<span
		// style=color:$1>$2</span>"); //顏色

		// str = ubbPattern(str, "\\[url\\](.*?)\\[/url]","<a href=\"$1\"
		// target=\"_blank\">$1</a>"); //url網址替換

		// str = ubbPattern(str, "(\\[URL\\])(.[^\\[]*)(\\[\\/URL\\])" ,"<a
		// href=\"$1\" target=\"_blank\">$2</a>"); //url網址替換

		str = ubbPattern(str, "\\[url=(.*?)\\](.*?)\\[/url\\]",
				"<a href=\"$1\" target=\"_blank\">$2</a>");

		return str;
	}

	public static String encodeUrl(String s) {
		String ret = s;
		try {
			ret = URLEncoder.encode(s.trim(), "UTF-8");
		} catch (Exception e) {
		}
		return ret;
	}

	public static String decode(String s) {
		String ret = s;
		try {
			ret = URLDecoder.decode(s.trim(), "UTF-8");
		} catch (Exception e) {
		}
		return ret;
	}

	
}