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wells
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package com.tailbet.service.impl;
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import com.tailbet.model.entity.RedPacket;
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import com.tailbet.model.entity.RedPacketRecv;
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import com.tailbet.model.entity.User;
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import com.tailbet.mapper.RedPacketMapper;
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import com.tailbet.mapper.RedPacketRecvMapper;
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import com.tailbet.mapper.UserMapper;
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import com.tailbet.mapper.GameRoundMapper;
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import com.tailbet.service.IRedPacketService;
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import com.tailbet.service.IPointsService;
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import com.tailbet.service.IAuditService;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.time.LocalDateTime;
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import java.util.*;
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/**
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* 红包Service实现
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*/
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@Slf4j
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@RequiredArgsConstructor
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@Service
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public class RedPacketServiceImpl implements IRedPacketService {
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private final RedPacketMapper redPacketMapper;
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private final RedPacketRecvMapper redPacketRecvMapper;
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private final UserMapper userMapper;
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private final GameRoundMapper gameRoundMapper;
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private final IPointsService pointsService;
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private final IAuditService auditService;
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/**
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* 发红包
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*/
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@Override
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@Transactional
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public RedPacket sendRp(Long userId, Long groupId, BigDecimal totalAmount,
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Integer totalCount, Long roundId) {
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User user = userMapper.selectById(userId);
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if (user == null) {
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throw new RuntimeException("用户不存在");
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}
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// 扣积分
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boolean success = pointsService.subPoints(userId, totalAmount.longValue(),
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IPointsService.TYPE_RP_SEND, null, null, "发送红包");
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if (!success) {
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throw new RuntimeException("余额不足");
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}
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// 创建红包
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RedPacket rp = new RedPacket();
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rp.setUserId(userId);
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rp.setGroupId(groupId);
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rp.setRoundId(roundId);
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rp.setTotalAmount(totalAmount);
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rp.setTotalCount(totalCount);
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rp.setRemainAmount(totalAmount);
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rp.setRemainCount(totalCount);
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rp.setStatus(STATUS_ONGOING);
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rp.setCreateTime(LocalDateTime.now());
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// 判断红包类型
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if (roundId != null) {
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rp.setType(TYPE_GAME);
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} else {
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rp.setType(TYPE_RANDOM);
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}
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redPacketMapper.insert(rp);
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// 审计日志
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auditService.log(groupId, roundId, userId, "RP_SEND",
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String.format("{\"rpId\":%d,\"amount\":%s,\"count\":%d}",
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rp.getId(), totalAmount, totalCount));
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return rp;
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}
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/**
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* 领红包
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*/
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@Override
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@Transactional
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public RedPacketRecv receiveRp(Long rpId, Long userId) {
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RedPacket rp = redPacketMapper.selectById(rpId);
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if (rp == null) {
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throw new RuntimeException("红包不存在");
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}
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if (rp.getStatus() != STATUS_ONGOING) {
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throw new RuntimeException("红包已领完");
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}
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// 检查是否已领取
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RedPacketRecv existing = redPacketRecvMapper.selectOne(new LambdaQueryWrapper<RedPacketRecv>()
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.eq(RedPacketRecv::getRpId, rpId)
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.eq(RedPacketRecv::getUserId, userId));
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if (existing != null) {
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throw new RuntimeException("已领取过该红包");
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}
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// 计算领取金额
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BigDecimal amount = calculateReceiveAmount(rp);
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// 更新红包
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rp.setRemainAmount(rp.getRemainAmount().subtract(amount));
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rp.setRemainCount(rp.getRemainCount() - 1);
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if (rp.getRemainCount() <= 0) {
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rp.setStatus(STATUS_FINISHED);
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}
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redPacketMapper.updateById(rp);
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// 加积分
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pointsService.addPoints(userId, amount.longValue(),
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IPointsService.TYPE_RP_RECV, String.valueOf(rpId), null, "领取红包");
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// 记录领取
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RedPacketRecv recv = new RedPacketRecv();
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recv.setRpId(rpId);
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recv.setUserId(userId);
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recv.setAmount(amount);
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recv.setCreateTime(LocalDateTime.now());
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redPacketRecvMapper.insert(recv);
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// 审计日志
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auditService.log(rp.getGroupId(), rp.getRoundId(), userId, "RP_RECV",
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String.format("{\"rpId\":%d,\"amount\":%s}", rpId, amount));
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return recv;
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}
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/**
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* 计算领取金额
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*/
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@Override
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public BigDecimal calculateReceiveAmount(RedPacket rp) {
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if (rp.getRemainCount() <= 0) {
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return BigDecimal.ZERO;
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}
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// 如果是游戏红包且有目标尾数,则需要控制手气王
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// 简化实现:随机分配
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Random random = new Random();
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if (rp.getRemainCount() == 1) {
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// 最后一个,拿剩余全部
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return rp.getRemainAmount();
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}
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// 随机金额,最小0.01
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double min = 0.01;
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double max = rp.getRemainAmount().divide(BigDecimal.valueOf(rp.getRemainCount()), 2, RoundingMode.HALF_UP).doubleValue() * 2;
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double amount = min + (max - min) * random.nextDouble();
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return BigDecimal.valueOf(amount).setScale(2, RoundingMode.HALF_UP);
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}
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/**
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* 获取红包详情
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*/
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@Override
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public RedPacket getById(Long rpId) {
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return redPacketMapper.selectById(rpId);
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}
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/**
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* 获取红包领取列表
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*/
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@Override
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public List<RedPacketRecv> getReceives(Long rpId) {
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return redPacketRecvMapper.selectList(new LambdaQueryWrapper<RedPacketRecv>()
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.eq(RedPacketRecv::getRpId, rpId)
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.orderByAsc(RedPacketRecv::getCreateTime));
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}
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/**
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* 查询红包记录
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*/
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@Override
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public Page<RedPacket> getRecords(Long userId, Integer pageNum, Integer pageSize) {
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Page<RedPacket> page = new Page<>(pageNum, pageSize);
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LambdaQueryWrapper<RedPacket> wrapper = new LambdaQueryWrapper<>();
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wrapper.eq(RedPacket::getUserId, userId)
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.orderByDesc(RedPacket::getCreateTime);
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return redPacketMapper.selectPage(page, wrapper);
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}
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/**
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* 查找进行中的游戏红包
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*/
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@Override
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public RedPacket getOngoingGameRp(Long groupId) {
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return redPacketMapper.selectOne(new LambdaQueryWrapper<RedPacket>()
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.eq(RedPacket::getGroupId, groupId)
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.eq(RedPacket::getType, TYPE_GAME)
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.eq(RedPacket::getStatus, STATUS_ONGOING)
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.isNotNull(RedPacket::getRoundId));
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}
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}
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