package com.cxqy.community.util;
/**
 * @Author yjl
 * @Date 2021/4/9 15:45
 * @Version 1.0
 */



public class InterceptNameUtil {


    /**
     * 定义所有常量
     */
    public static final String EMPTY = "";
    public static final int ZERO = 0;
    public static final int ONE = 1;
    public static final int TWO = 2;
    public static final int THREE = 3;
    public static final int FOUR = 4;
    public static final int FIVE = 5;
    public static final int SIX = 6;
    public static final int SEVEN = 7;
    public static final int EIGHT = 8;
    public static final int NINE = 9;

    public static String left(String str, int len) {
        if (str == null) {
            return null;
        }
        if (len < ZERO) {
            return EMPTY;
        }
        if (str.length() <= len) {
            return str;
        }
        return str.substring(ZERO, len);

    }

    public static String right(String str, int len) {
        if (str == null) {
            return null;
        }
        if (len < ZERO) {
            return EMPTY;
        }
        if (str.length() <= len) {
            return str;
        }
        return str.substring(str.length() - len);

    }
    public static String checkNameLength(String str){
        if(str == null){
            return null;
        }
        if(str.length() == ONE) {
            return str;
        }else if(str.length() == TWO){
            return "*" + InterceptNameUtil.right(str, ONE);
        }else if(str.length() == THREE){
            return InterceptNameUtil.left(str, ONE) + "*" + InterceptNameUtil.right(str, ONE);
        }else if(str.length() == FOUR){
            return InterceptNameUtil.left(str, ONE) + "**" + InterceptNameUtil.right(str, ONE);
        }else if(str.length() == FIVE){
            return InterceptNameUtil.left(str, ONE) + "**" + InterceptNameUtil.right(str, ONE);
        }else if(str.length() == SIX){
            return InterceptNameUtil.left(str, ONE) + "**" + InterceptNameUtil.right(str, ONE);
        }else if(str.length() == SEVEN){
            return InterceptNameUtil.left(str, ONE) + "**" + InterceptNameUtil.right(str, ONE);
        }else if(str.length() == EIGHT){
            return InterceptNameUtil.left(str, ONE) + "**" + InterceptNameUtil.right(str, ONE);
        }else if(str.length() > NINE){
            return InterceptNameUtil.left(str, ONE) + "***" + InterceptNameUtil.right(str, ONE);
        }

        return str;
    }


}