dingdong/src/main/java/com/izouma/dingdong/service/CouponService.java

package com.izouma.dingdong.service;

import com.izouma.dingdong.domain.Coupon;
import com.izouma.dingdong.dto.CouponDTO;
import com.izouma.dingdong.repo.CouponRepo;
import com.izouma.dingdong.repo.merchant.MerchantRepo;
import com.izouma.dingdong.service.merchant.MerchantService;
import lombok.AllArgsConstructor;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.util.List;
import java.util.stream.Collectors;


@Service
@AllArgsConstructor
public class CouponService {

    private CouponRepo      couponRepo;
    private MerchantService merchantService;
    private MerchantRepo    merchantRepo;

    public List<Coupon> my(Long userId, Boolean isAll) {
        Long merchantId = merchantService.findMerchantId(userId);
        List<Coupon> coupons = couponRepo.findAllByMerchantIdAndEnabledTrue(merchantId);
        if (isAll) {
            return coupons.stream()
                    .filter(c -> !c.getStartDate().isBefore(LocalDate.now()))
                    .collect(Collectors.toList());
        }
        return coupons.stream().filter(c -> !c.getEndDate().isBefore(LocalDate.now())).collect(Collectors.toList());
    }

    public CouponDTO toDTO(Coupon coupon) {
        CouponDTO dto = CouponDTO.builder()
                .id(coupon.getId())
                .amount(coupon.getAmount())
                .endDate(coupon.getEndDate())
                .fullAmount(coupon.getFullAmount())
                .name(coupon.getName())
                .startDate(coupon.getStartDate())
                .build();
        if (coupon.getFullAmount() == null) {
            dto.setDescription("无使用限制");
        } else {
            dto.setDescription("满" + coupon.getFullAmount() + "减" + coupon.getAmount());
        }
        merchantRepo.findById(coupon.getMerchantId()).ifPresent(m -> dto.setMerchantName(m.getShowName()));
        return dto;
    }

}