[feat] 나만의 bar soft delete 기능 구현 #31 (#36)

* feat: MyBarRepository에 소프트 삭제 기능 추가

- MyBar 엔티티를 삭제 시 실제 DB에서 삭제하는 대신, status를 'DELETED'로 변경하는 소프트 삭제 로직을 추가

* feat: 마이바(MyBar) 킵 해제 기능 추가 (소프트 삭제)

* feat: MyBarController에 칵테일 킵(Keep) 해제 API 추가

Author: MEOHIN

src/main/java/com/back/domain/mybar/controller/MyBarController.java

@@ -37,4 +37,14 @@ public RsData<Void> keep(
         myBarService.keep(userId, cocktailId);
         return RsData.of(201, "kept"); // Aspect가 HTTP 201로 설정
     }
+
+    /** 킵 해제(소프트 삭제) — 멱등 */
+    @DeleteMapping("/{cocktailId}/keep")
+    public RsData<Void> unkeep(
+            @AuthenticationPrincipal(expression = "id") Long userId,
+            @PathVariable Long cocktailId
+    ) {
+        myBarService.unkeep(userId, cocktailId);
+        return RsData.of(200, "deleted");
+    }
 }

src/main/java/com/back/domain/mybar/repository/MyBarRepository.java

@@ -5,6 +5,8 @@
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
@@ -22,4 +24,14 @@ public interface MyBarRepository extends JpaRepository<MyBar, Long> {
 
     /** 복원/재킵을 위해 status 무시하고 한 건 찾기 (없으면 Optional.empty) */
     Optional<MyBar> findByUser_IdAndCocktail_CocktailId(Long userId, Long cocktailId);
+
+    @Modifying(clearAutomatically = true, flushAutomatically = true)
+    @Query("""
+        update MyBar m
+           set m.status = 'DELETED', m.deletedAt = CURRENT_TIMESTAMP
+         where m.user.id = :userId
+           and m.cocktail.cocktailId = :cocktailId
+           and m.status = 'ACTIVE'
+    """)
+    int softDeleteByUserAndCocktail(Long userId, Long cocktailId);
 }

src/main/java/com/back/domain/mybar/service/MyBarService.java

@@ -68,4 +68,10 @@ public void keep(Long userId, Long cocktailId) {
 
         myBarRepository.save(myBar);
     }
+
+    /** 킵 해제(소프트 삭제) */
+    @Transactional
+    public void unkeep(Long userId, Long cocktailId) {
+        myBarRepository.softDeleteByUserAndCocktail(userId, cocktailId);
+    }
 }