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[feat] 상품 찜 기능 구현 (#353)
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‎src/main/java/com/back/domain/wishlist/controller/WishlistController.java‎

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package com.back.domain.wishlist.controller;
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import com.back.domain.wishlist.service.WishlistService;
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import com.back.global.rsData.RsData;
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import com.back.global.security.auth.CustomUserDetails;
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import io.swagger.v3.oas.annotations.tags.Tag;
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import lombok.RequiredArgsConstructor;
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import org.springframework.http.ResponseEntity;
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import org.springframework.security.core.annotation.AuthenticationPrincipal;
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import org.springframework.web.bind.annotation.*;
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import java.util.UUID;
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@RestController
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@RequiredArgsConstructor
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@RequestMapping("/api/wishlist/{productUuid}")
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@Tag(name = "상품 찜", description = "상품 찜 관련 API")
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public class WishlistController {
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private final WishlistService wishlistService;
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/** 찜 등록 */
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@PostMapping
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public ResponseEntity<RsData<UUID>> addWishlist(
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@PathVariable UUID productUuid,
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@AuthenticationPrincipal CustomUserDetails customUserDetails) {
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UUID addWishlistProductUuid = wishlistService.addWishlist(productUuid, customUserDetails);
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return ResponseEntity.ok(RsData.of("200", "상품이 위시리스트에 추가되었습니다.", addWishlistProductUuid));
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}
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/** 찜 삭제 */
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@DeleteMapping
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public ResponseEntity<RsData<UUID>> removeWishlist(
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@PathVariable UUID productUuid,
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@AuthenticationPrincipal CustomUserDetails customUserDetails) {
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UUID removeWishlistProductUuid = wishlistService.removeWishlist(productUuid, customUserDetails);
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return ResponseEntity.ok(RsData.of("200", "상품이 위시리스트에서 제거되었습니다.", removeWishlistProductUuid));
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}
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/** 상품별 찜 개수 조회 */
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@GetMapping("/count")
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public ResponseEntity<RsData<Long>> getWishlistCount(
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@PathVariable UUID productUuid) {
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Long count = wishlistService.getWishlistCount(productUuid);
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return ResponseEntity.ok(RsData.of("200", "상품 찜 개수 조회 성공", count));
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}
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}

‎src/main/java/com/back/domain/wishlist/entity/Wishlist.java‎

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package com.back.domain.wishlist.entity;
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import com.back.domain.product.product.entity.Product;
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import com.back.domain.user.entity.User;
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import com.back.global.jpa.entity.BaseEntity;
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import jakarta.persistence.*;
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import lombok.*;
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import org.hibernate.annotations.OnDelete;
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import org.hibernate.annotations.OnDeleteAction;
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@Entity
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@Getter
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@NoArgsConstructor
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@AllArgsConstructor
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@Builder
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@Table(name = "wishlists",
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uniqueConstraints = {@UniqueConstraint(columnNames = {"user_id", "product_id"})}) // 중복 찜 방지
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public class Wishlist extends BaseEntity {
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name = "user_id", nullable = false)
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@OnDelete(action = OnDeleteAction.CASCADE)
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private User user; // 유저 FK
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name = "product_id", nullable = false)
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@OnDelete(action = OnDeleteAction.CASCADE)
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private Product product; // 상품 FK
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}

‎src/main/java/com/back/domain/wishlist/repository/WishlistRepository.java‎

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package com.back.domain.wishlist.repository;
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import com.back.domain.wishlist.entity.Wishlist;
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import org.springframework.data.jpa.repository.JpaRepository;
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public interface WishlistRepository extends JpaRepository<Wishlist, Long> {
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// 찜 등록 여부 조회
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boolean existsByUserIdAndProductId(Long userId, Long productId);
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// 찜 삭제
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void deleteByUserIdAndProductId(Long userId, Long productId);
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// 상품별 찜 개수 조회
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Long countByProductId(Long productId);
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}

‎src/main/java/com/back/domain/wishlist/service/WishlistService.java‎

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package com.back.domain.wishlist.service;
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import com.back.domain.product.product.entity.Product;
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import com.back.domain.product.product.repository.ProductRepository;
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import com.back.domain.user.entity.User;
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import com.back.domain.user.repository.UserRepository;
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import com.back.domain.wishlist.entity.Wishlist;
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import com.back.domain.wishlist.repository.WishlistRepository;
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import com.back.global.exception.ServiceException;
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import com.back.global.security.auth.CustomUserDetails;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import java.util.UUID;
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@Service
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@RequiredArgsConstructor
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@Slf4j
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public class WishlistService {
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private final WishlistRepository wishlistRepository;
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private final UserRepository userRepository;
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private final ProductRepository productRepository;
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/** 찜 등록 */
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@Transactional
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public UUID addWishlist(UUID productUuid, CustomUserDetails customUserDetails) {
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User user = validateAndGetUser(customUserDetails.getUser());
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Product product = validateAndGetProduct(productUuid);
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validateDuplicateWishlist(user.getId(), product.getId());
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Wishlist wishlist = Wishlist.builder()
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.user(user)
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.product(product)
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.build();
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return wishlistRepository.save(wishlist).getProduct().getProductUuid();
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}
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/** 찜 삭제 */
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@Transactional
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public UUID removeWishlist(UUID productUuid, CustomUserDetails customUserDetails) {
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User user = validateAndGetUser(customUserDetails.getUser());
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Product product = validateAndGetProduct(productUuid);
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if (!wishlistRepository.existsByUserIdAndProductId(user.getId(), product.getId())) {
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throw new ServiceException("404", "위시리스트 항목을 찾을 수 없습니다.");
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}
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wishlistRepository.deleteByUserIdAndProductId(user.getId(), product.getId());
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return product.getProductUuid();
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}
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/** 상품별 찜 개수 조회 */
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public Long getWishlistCount(UUID productUuid) {
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Product product = validateAndGetProduct(productUuid);
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return wishlistRepository.countByProductId(product.getId());
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}
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/** Validation 메서드 */
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// 사용자 검증
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private User validateAndGetUser(User user){
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return userRepository.findById(user.getId())
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.orElseThrow(() -> new ServiceException("404", "사용자를 찾을 수 없습니다."));
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}
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// 상품 검증
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private Product validateAndGetProduct(UUID productUuid) {
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return productRepository.findByProductUuid(productUuid)
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.orElseThrow(() -> new ServiceException("404", "존재하지 않는 상품입니다. UUID: " + productUuid));
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}
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// 중복 찜 검증
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private void validateDuplicateWishlist(Long userId, Long productId) {
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if (wishlistRepository.existsByUserIdAndProductId(userId, productId)) {
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throw new ServiceException("409", "이미 위시리스트에 추가된 상품입니다.");
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}
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}
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}

‎src/main/java/com/back/global/security/config/SecurityConfig.java‎

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// 공개 API
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.requestMatchers("/public/**").permitAll()
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// 상품,카테고리,태그 조회 / 상품 파일 다운로드(테스트용) / 상품 상세 조회 / 상품 상세-작가 정보 조회 / 메인페이지에서 주제별 상품 조회 / 검색 - 로그인 없이 접근 허용
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.requestMatchers(HttpMethod.GET, "/api/products","/api/products/*", "/api/categories","/api/tags", "/api/products/images/download/{productUuid}","/api/products/{productUuid}/*", "/api/search").permitAll()
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// 상품,카테고리,태그 조회 / 상품 파일 다운로드(테스트용) / 상품 상세 조회 / 상품 상세-작가 정보 조회 / 메인페이지에서 주제별 상품 조회 / 검색 / 상품별 찜 개수 조회 - 로그인 없이 접근 허용
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.requestMatchers(HttpMethod.GET, "/api/products","/api/products/*", "/api/categories","/api/tags", "/api/products/images/download/{productUuid}","/api/products/{productUuid}/*", "/api/search", "/api/wishlist/{productUuid}/count").permitAll()
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// 상품 찜 등록, 삭제 - 로그인한 유저만 접근 가능
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.requestMatchers("/api/wishlist/{productUuid}").authenticated()
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// 상품 등록, 수정, 삭제 / 상품 이미지 업로드 / 작가 사업자 정보 조회 - ARTIST, ADMIN, ROOT만 접근 가능
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.requestMatchers("/api/products", "/api/products/*", "/api/artist/business-info").hasAnyRole("ARTIST", "ADMIN", "ROOT")
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// 카테고리,태그 등록, 수정, 삭제 - ADMIN, ROOT만 접근 가능

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