CinemaDemo/src/main/java/com/example/cinema/blImpl/VIPServiceImpl.java

package com.example.cinema.blImpl;

import com.example.cinema.bl.VIPService;
import com.example.cinema.data.VIPCardMapper;
import com.example.cinema.vo.VIPCardForm;
import com.example.cinema.po.VIPCard;
import com.example.cinema.strategy.ChargeStrategy;
import com.example.cinema.strategy.ReturnStrategy;
import com.example.cinema.vo.ResponseVO;
import com.example.cinema.vo.VIPInfoVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by liying on 2019/4/14.
 */
@Service
public class VIPServiceImpl implements VIPService {
    @Autowired
    VIPCardMapper vipCardMapper;

    @Override
    public ResponseVO addVIPCard(int userId) {
        VIPCard vipCard = new VIPCard();
        vipCard.setUserId(userId);
        vipCard.setBalance(0);
        try {
            return ResponseVO.buildSuccess(vipCardMapper.insertOneCard(vipCard));
        } catch (Exception e) {
            e.printStackTrace();
            return ResponseVO.buildFailure("失败");
        }
    }

    @Override
    public ResponseVO getCardById(int id) {
        try {
            return ResponseVO.buildSuccess(vipCardMapper.selectCardById(id));
        } catch (Exception e) {
            e.printStackTrace();
            return ResponseVO.buildFailure("失败");
        }
    }

    @Override
    public ResponseVO getVIPInfo() {
        List<ChargeStrategy> strategies = new ArrayList<>();
        strategies.add(new ReturnStrategy());
        VIPInfoVO vipInfoVO = new VIPInfoVO();
        vipInfoVO.setStrategies(strategies);
        vipInfoVO.setPrice(VIPCard.price);
        return ResponseVO.buildSuccess(vipInfoVO);
    }

    @Override
    public ResponseVO charge(VIPCardForm vipCardForm) {
        if (vipCardForm.getStrategyName() == null) {
            return ResponseVO.buildFailure("充值优惠策略不能为空");
        }
        ChargeStrategy chargeStrategy;
        try {
            Class c = Class.forName(vipCardForm.getStrategyName());
            //如果是抽象类或接口
            if (Modifier.isAbstract(c.getModifiers()) || Modifier.isInterface(c.getModifiers())) {
                return ResponseVO.buildFailure("充值优惠策略不存在");
            }
            chargeStrategy = (ChargeStrategy) c.newInstance();
        } catch (ClassNotFoundException e) {
            return ResponseVO.buildFailure("充值优惠策略不存在");
        } catch (IllegalAccessException e) {
            chargeStrategy = new ReturnStrategy();
        } catch (InstantiationException e) {
            chargeStrategy = new ReturnStrategy();
        }
        VIPCard vipCard=vipCardMapper.selectCardById(vipCardForm.getVipId());
        if(vipCard==null){
            return ResponseVO.buildFailure("会员卡不存在");
        }
        double balance = chargeStrategy.calculate(vipCardForm.getAmount());
        vipCard.setBalance(vipCard.getBalance()+balance);
        try {
            return ResponseVO.buildSuccess(vipCardMapper.updateCardBalance(vipCardForm.getVipId(),balance));
        } catch (Exception e) {
            e.printStackTrace();
            return ResponseVO.buildFailure("失败");
        }
    }


}