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CouponIssueService.java
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CouponIssueService.java
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package me.gnoyes.couponcore.service;
import lombok.RequiredArgsConstructor;
import me.gnoyes.couponcore.exception.CouponIssueException;
import me.gnoyes.couponcore.model.Coupon;
import me.gnoyes.couponcore.model.CouponIssue;
import me.gnoyes.couponcore.repository.mysql.CouponIssueJpaRepository;
import me.gnoyes.couponcore.repository.mysql.CouponIssueRepository;
import me.gnoyes.couponcore.repository.mysql.CouponJpaRepository;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import static me.gnoyes.couponcore.exception.ErrorCode.COUPON_NOT_EXIST;
import static me.gnoyes.couponcore.exception.ErrorCode.DUPLICATED_COUPON_ISSUE;
@RequiredArgsConstructor
@Service
public class CouponIssueService {
private final CouponJpaRepository couponJpaRepository;
private final CouponIssueJpaRepository couponIssueJpaRepository;
private final CouponIssueRepository couponIssueRepository;
@Transactional
public void issue(long couponId, long userId) {
Coupon coupon = findCoupon(couponId);
coupon.issue();
saveCouponIssue(couponId, userId);
}
@Transactional(readOnly = true)
public Coupon findCoupon(long couponId) {
return couponJpaRepository.findById(couponId)
.orElseThrow(() -> new CouponIssueException(COUPON_NOT_EXIST, "쿠폰 정책이 존재하지 않습니다. couponId: %s".formatted(couponId)));
}
public CouponIssue saveCouponIssue(long couponId, long userId) {
checkAlreadyIssuance(couponId, userId);
CouponIssue issue = CouponIssue.builder()
.couponId(couponId)
.userId(userId)
.build();
return couponIssueJpaRepository.save(issue);
}
private void checkAlreadyIssuance(long couponId, long userId) {
CouponIssue issue = couponIssueRepository.findFirstCouponIssue(couponId, userId);
if (issue != null) {
throw new CouponIssueException(DUPLICATED_COUPON_ISSUE, "이미 발급된 쿠폰입니다. userId: %s, couponId: %s".formatted(userId, couponId));
}
}
}