CinemaDemo/src/main/java/com/example/cinema/blImpl/statistics/StatisticsServiceImpl.java

package com.example.cinema.blImpl.statistics;

import com.example.cinema.bl.statistics.StatisticsService;
import com.example.cinema.data.statistics.StatisticsMapper;
import com.example.cinema.vo.AudiencePrice;
import com.example.cinema.vo.AudiencePriceVO;
import com.example.cinema.vo.MovieScheduleTimeVO;
import com.example.cinema.vo.ResponseVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

/**
 * @author fjj
 * @date 2019/4/16 1:34 PM
 */
@Service
public class StatisticsServiceImpl implements StatisticsService {
    @Autowired
    private StatisticsMapper statisticsMapper;
    @Override
    public ResponseVO getScheduleRateByDate(Date date) {
        try{
            Date requireDate = date;
            if(requireDate == null){
                requireDate = new Date();
            }
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            requireDate = simpleDateFormat.parse(simpleDateFormat.format(requireDate));

            Date nextDate = getNumDayAfterDate(requireDate, 1);
            List<MovieScheduleTimeVO> movieScheduleTimeVOList = statisticsMapper.selectMovieScheduleTimes(requireDate, nextDate);
            return ResponseVO.buildSuccess(movieScheduleTimeVOList);

        }catch (Exception e){
            e.printStackTrace();
            return ResponseVO.buildFailure("失败");
        }
    }

    @Override
    public ResponseVO getTotalBoxOffice() {
        try {
            return ResponseVO.buildSuccess(statisticsMapper.selectMovieTotalBoxOffice());
        }catch (Exception e){
            e.printStackTrace();
            return ResponseVO.buildFailure("失败");
        }
    }

    @Override
    public ResponseVO getAudiencePriceSevenDays() {
        try {
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            Date today = simpleDateFormat.parse(simpleDateFormat.format(new Date()));
            Date startDate = getNumDayAfterDate(today, -6);
            List<AudiencePriceVO> audiencePriceVOList = new ArrayList<>();
            for(int i = 0; i < 7; i++){
                AudiencePriceVO audiencePriceVO = new AudiencePriceVO();
                Date date = getNumDayAfterDate(startDate, i);
                audiencePriceVO.setDate(date);
                List<AudiencePrice> audiencePriceList = statisticsMapper.selectAudiencePrice(date, getNumDayAfterDate(date, 1));
                double totalPrice = audiencePriceList.stream().mapToDouble(item -> item.getTotalPrice()).sum();
                audiencePriceVO.setPrice(Double.parseDouble(String.format("%.2f", audiencePriceList.size() == 0 ? 0 : totalPrice / audiencePriceList.size())));
                audiencePriceVOList.add(audiencePriceVO);
            }
            return ResponseVO.buildSuccess(audiencePriceVOList);
        }catch (Exception e){
            e.printStackTrace();
            return ResponseVO.buildFailure("失败");
        }
    }

    @Override
    public ResponseVO getMoviePlacingRateByDate(Date date) {
        //要求见接口说明
        return null;
    }

    @Override
    public ResponseVO getPopularMovies(int days, int movieNum) {
        //要求见接口说明
        return null;
    }


    /**
     * 获得num天后的日期
     * @param oldDate
     * @param num
     * @return
     */
    Date getNumDayAfterDate(Date oldDate, int num){
        Calendar calendarTime = Calendar.getInstance();
        calendarTime.setTime(oldDate);
        calendarTime.add(Calendar.DAY_OF_YEAR, num);
        return calendarTime.getTime();
    }
}