package org.distributed.gateway.util;

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

public class UserAgentUtil {
	
//	public static void main(String[] args) {
//
//	String ua = request.getHeader("User-Agent").toLowerCase();
//	String deviceType = this.check(ua) ? "mobile" : "pc";
//	String deviceName = this.getDeviceName(ua);
//	}

		// \b 是单词边界(连着的两个(字母字符 与 非字母字符) 之间的逻辑上的间隔),
		// 字符串在编译时会被转码一次,所以是 "\\b"
		// \B 是单词内部逻辑间隔(连着的两个字母字符之间的逻辑上的间隔)
		static String phoneReg = "\\b(ip(hone|od)|android|opera m(ob|in)i" + "|windows (phone|ce)|blackberry" + "|s(ymbian|eries60|amsung)|p(laybook|alm|rofile/midp"
				+ "|laystation portable)|nokia|fennec|htc[-_]" + "|mobile|up.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";
		static String tableReg = "\\b(ipad|tablet|(Nexus 7)|up.browser" + "|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";

		// 移动设备正则匹配：手机端、平板
		static Pattern phonePat = Pattern.compile(phoneReg, Pattern.CASE_INSENSITIVE);
		static Pattern tablePat = Pattern.compile(tableReg, Pattern.CASE_INSENSITIVE);

		/**
		 * 检测是否是移动设备访问
		 * 
		 * @Title: check
		 * @Date : 2014-7-7 下午01:29:07
		 * @param userAgent
		 *            浏览器标识
		 * @return true:移动设备接入，false:pc端接入
		 */
		public static boolean check(String userAgent) {
			if (null == userAgent) {
				userAgent = "";
			}
			// 匹配
			Matcher matcherPhone = phonePat.matcher(userAgent);
			Matcher matcherTable = tablePat.matcher(userAgent);
			if (matcherPhone.find() || matcherTable.find()) {
				return true;
			} else {
				return false;
			}
		}
		/**
		 * 获取设备名称
		 * @param userAgent
		 * @return
		 */
		public static String getDeviceName(String userAgent) {
			if (null == userAgent) {
				userAgent = "";
			}
			// 匹配
			Matcher matcherPhone = phonePat.matcher(userAgent);
			Matcher matcherTable = tablePat.matcher(userAgent);
			if (matcherPhone.find()) {
				return matcherPhone.group();
			} else if (matcherTable.find()) {
				return matcherTable.group();
			} else {
				return "pc";
			}
		}
}
