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package com.sghd.common.utils.lang;

import java.io.UnsupportedEncodingException;

import org.apache.commons.lang3.StringUtils;

/**
 * UTF8字符工具类
 */
public class UTF8Utils {
	/**
	 * 检测utf8mb4编码
	 * @param str
	 * @return boolean
	 * @throws UnsupportedEncodingException
	 */
	public static boolean checkUTF8MB4(String str) throws UnsupportedEncodingException {
		if (null == str || str.length() == 0) {
			return false;
		}
		byte[] bytes = str.getBytes("UTF-8");
		for (int i = 0; i < bytes.length; i++) {
			byte b = bytes[i];
			// 四字节字符即utf8mb4字符
			if ((b & 0xF0) == 0xF0) {
				return true;
			}
			// 三字节字符
			if ((b & 0xE0) == 0xE0) {
				i += 2;
				continue;
			}
			// 双字节字符
			if ((b & 0xC0) == 0xC0) {
				i += 1;
				continue;
			}
			// 单字节字符(跳过)
			// if (b >> 7 == 0) {
			// continue;
			// }
		}
		return false;
	}
	
	/** 
     * 将emoji表情替换成* 
     *  
     * @param source 
     * @return 过滤后的字符串 
     */  
    public static String filterEmoji(String source) {  
        if(StringUtils.isNotBlank(source)){  
            return source.replaceAll("[\\ud800\\udc00-\\udbff\\udfff\\ud800-\\udfff]", "*");  
        }else{  
            return source;  
        }  
    } 

	/**
	 * 转换为字符串唯一键
	 * @param str
	 * @return
	 */
	public static String toUniqueKey(String str) {
		String key = str.trim();
		key = key.replaceAll("[¹]", "1");
		key = key.replaceAll("[²]", "2");
		key = key.replaceAll("[³]", "3");
		key = key.replaceAll("[a,ª,À,Á,Â,Ã,Ä,Å,à,á,â,ã,ä,å]", "A");
		key = key.replaceAll("[b]", "B");
		key = key.replaceAll("[c,Ç,ç,ç]", "C");
		key = key.replaceAll("[d]", "D");
		key = key.replaceAll("[e,È,É,Ê,Ë,è,é,ê,ë]", "E");
		key = key.replaceAll("[f]", "F");
		key = key.replaceAll("[g]", "G");
		key = key.replaceAll("[h]", "H");
		key = key.replaceAll("[i,Ì,Í,Î,Ï,ì,í,î,ï]", "I");
		key = key.replaceAll("[j]", "J");
		key = key.replaceAll("[k]", "K");
		key = key.replaceAll("[l]", "L");
		key = key.replaceAll("[m]", "M");
		key = key.replaceAll("[n,Ñ,ñ]", "N");
		key = key.replaceAll("[o,º,Ò,Ó,Ô,Õ,Ö,ò,ó,ô,õ,ö]", "O");
		key = key.replaceAll("[p]", "P");
		key = key.replaceAll("[q]", "Q");
		key = key.replaceAll("[r]", "R");
		key = key.replaceAll("[s,Š,š]", "S");
		key = key.replaceAll("[t]", "T");
		key = key.replaceAll("[u,Ù,Ú,Û,Ü,ù,ú,û,ü]", "U");
		key = key.replaceAll("[v]", "V");
		key = key.replaceAll("[w]", "W");
		key = key.replaceAll("[x]", "X");
		key = key.replaceAll("[y,Ÿ,Ý,ý]", "Y");
		key = key.replaceAll("[z,Ž,ž]", "Z");
		key = key.replaceAll("[œ]", "Œ");
		key = key.replaceAll("[æ]", "Æ");
		key = key.replaceAll("[ð]", "Ð");
		key = key.replaceAll("[ø]", "Ø");
		key = key.replaceAll("[þ]", "Þ");
		return key;
	}
}