package com.ks.app.utils.user;
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import java.math.BigDecimal;
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/**
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* @author hxh
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* @title: InviteCodeUtil
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* @description: 邀请码工具类
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* @date 2022/4/18 15:25
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*/
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public class InviteCodeUtil {
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public static String createInviteCode(Long uid) {
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return createInviteCode((int) (Math.random() * 10 + 1), uid);
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}
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public static String createInviteCode(int base, Long uid) {
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long num = base * 100000000L + uid;
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return convert10To36(num);
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}
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private static String convert10To36(Long num) {
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String numbers = "YE9VFA3N6KG7JZH4LD5IO2RBS0QTMPU1WC8X";
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BigDecimal numBig = new BigDecimal(num);
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int ge = numBig.divideAndRemainder(new BigDecimal(36))[1].intValue();
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int n = 1;
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String result = "";
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result += numbers.charAt(ge);
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while (numBig.divideAndRemainder(new BigDecimal(36).pow(n))[0].compareTo(new BigDecimal(0)) > 0) {
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int w = numBig.divideAndRemainder(new BigDecimal(36).pow(n))[0].divideAndRemainder(new BigDecimal(36))[1]
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.intValue();
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result = numbers.charAt(w) + result;
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n++;
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}
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return result;
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}
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}
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