hust-epi/whepi-web/src/main/java/com/bofeng/service/BuyService.java

package com.bofeng.service;

import com.baomidou.mybatisplus.toolkit.IdWorker;
import com.bofeng.dao.BuyMapper;
import com.bofeng.dao.JmTuangouDao;
import com.bofeng.entity.Buy;
import com.bofeng.entity.JmTuangou;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Transactional(readOnly = true)
public class BuyService {

  @Autowired
  private BuyMapper buyMapper;

  @Autowired
  private JmTuangouDao jmTuangouDao;

  @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED)
  public int buyGroup(Buy buy) {
    Buy buy1 = buyMapper.selectBuyOne(buy.getUserId(), buy.getJmId());
    if (buy1 != null) {
      JmTuangou jmTuangou = jmTuangouDao.selectJmTuangouByJmId(buy1.getJmId());
      Buy buy2 = buyMapper.selectById(buy1.getBuyId());
      if (jmTuangou.getTgMaxNum().intValue() >= jmTuangou.getCurrentNum().intValue() - buy2.getBuyCount().intValue() + buy.getBuyCount().intValue()) {
        buy.setBuyId(buy1.getBuyId());
        return buyMapper.updateById(buy);
      } else {
        return 3;//不允许更改团购数量
      }
    }
    //第一次购买团购数量大于最大上限数量不允许
    JmTuangou jmTuangou = jmTuangouDao.selectById(buy.getJmId());
    if (jmTuangou.getTgMaxNum().intValue() < jmTuangou.getCurrentNum().intValue() + buy.getBuyCount().intValue()) {
      return 3;
    }
    buy.setBuyId(IdWorker.getId());
    buy.setUserCreate(buy.getUserId());
    buy.setTimeCreate(new DateTime());
    buy.setBuyStatus(1);//在团
    return buyMapper.insert(buy);
  }

  @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED)
  public List<JmTuangou> group(Long userId) {
    updateStatus();
    return buyMapper.group(userId);
  }

  @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED)
  public List<Buy> MyGroup(Long userId) {
    updateStatus();
    return buyMapper.MyGroup(userId);
  }

  public Buy queryGroup(Long buyId) {
    return buyMapper.selectById(buyId);
  }


  public JmTuangou selectGroup(Long userId, Long jmId) {
    return buyMapper.selectGroup(userId, jmId);
  }

  @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED)
  public int buyBack(Buy buy) {
    //在该套餐截止日期之前 并且是在团状态的才能撤单
    JmTuangou jmTuangou = buyMapper.selectGroup(buy.getUserId(), buy.getJmId());
    if (jmTuangou.getTgEndTime().getTime() > new DateTime().getMillis() && jmTuangou.getTgStatus() == 1) {
      Buy buy1 = buyMapper.selectBuyOne(buy.getUserId(), buy.getJmId());
      buy.setBuyId(buy1.getBuyId());
      buy.setBuyStatus(2);//撤单
      return buyMapper.updateById(buy);
    }
    //不允许更改
    return 2;
  }

  public Buy status(Buy buy) {
    return buyMapper.status(buy.getJmId(), buy.getUserId());
  }

  //截止日期状态的更改
  @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED)
  public int updateStatus() {
    List<JmTuangou> jmTuangous = jmTuangouDao.selectAll();
    if (jmTuangous != null && jmTuangous.size() > 0) {
      for (JmTuangou list : jmTuangous) {
        // 团购数量  最小起订量
        Buy buy = buyMapper.selectCountNum(list.getJmId());
        //已经到截止时间
        if (list.getTgEndTime().getTime() < new DateTime().getMillis()) {

          if (buy != null) { //最小起订量
            if (list.getTgMinNum().intValue() > buy.getCount().intValue()) {
              jmTuangouDao.updateStatusByJmId(list.getJmId(), 4L);//取消
            } else {
              jmTuangouDao.updateStatusByJmId(list.getJmId(), 2L);//发货
            }
          } else {
            jmTuangouDao.updateStatusByJmId(list.getJmId(), 4L);//取消
          }
        } else {
          //团购数量已经过了最大起订量的 就直接发货
          if (buy != null) {
            if (list.getTgMaxNum().intValue() == buy.getCount().intValue()) {
              jmTuangouDao.updateStatusByJmId(list.getJmId(), 2L);//发货
            }
          }
        }

      }
    }
    return 1;
  }

}