feat : 가게에 달린 응원들 조회 서비스 로직 구현

Author: leegwichan

src/main/java/eatda/controller/store/CheerInStoreResponse.java

@@ -0,0 +1,20 @@
+package eatda.controller.store;
+
+import eatda.domain.store.Cheer;
+
+public record CheerInStoreResponse(
+        long id,
+        long memberId,
+        String memberName,
+        String description
+) {
+
+    public CheerInStoreResponse(Cheer cheer) {
+        this(
+                cheer.getId(),
+                cheer.getMember().getId(),
+                cheer.getMember().getNickname(),
+                cheer.getDescription()
+        );
+    }
+}

src/main/java/eatda/controller/store/CheersInStoreResponse.java

@@ -0,0 +1,6 @@
+package eatda.controller.store;
+
+import java.util.List;
+
+public record CheersInStoreResponse(List<CheerInStoreResponse> cheers) {
+}

src/main/java/eatda/repository/store/CheerRepository.java

@@ -15,6 +15,8 @@ public interface CheerRepository extends Repository<Cheer, Long> {
 
     List<Cheer> findAllByOrderByCreatedAtDesc(Pageable pageable);
 
+    List<Cheer> findAllByStoreOrderByCreatedAtDesc(Store store, Pageable pageable);
+
     @Query("""
             SELECT c.imageKey FROM Cheer c
                 WHERE c.store = :store AND c.imageKey IS NOT NULL

src/main/java/eatda/repository/store/StoreRepository.java

@@ -1,14 +1,20 @@
 package eatda.repository.store;
 
 import eatda.domain.store.Store;
+import eatda.exception.BusinessErrorCode;
+import eatda.exception.BusinessException;
 import java.util.List;
 import java.util.Optional;
 import org.springframework.data.domain.Pageable;
-import org.springframework.data.repository.Repository;
+import org.springframework.data.jpa.repository.JpaRepository;
 
-public interface StoreRepository extends Repository<Store, Long> {
+public interface StoreRepository extends JpaRepository<Store, Long> {
 
-    Store save(Store store);
+    @Override
+    default Store getById(Long id) {
+        return findById(id)
+                .orElseThrow(() -> new BusinessException(BusinessErrorCode.STORE_NOT_FOUND));
+    }
 
     Optional<Store> findByKakaoId(String kakaoId);
 

src/main/java/eatda/service/store/CheerService.java

@@ -2,9 +2,11 @@
 
 import eatda.client.map.MapClient;
 import eatda.client.map.StoreSearchResult;
+import eatda.controller.store.CheerInStoreResponse;
 import eatda.controller.store.CheerPreviewResponse;
 import eatda.controller.store.CheerRegisterRequest;
 import eatda.controller.store.CheerResponse;
+import eatda.controller.store.CheersInStoreResponse;
 import eatda.controller.store.CheersResponse;
 import eatda.domain.ImageDomain;
 import eatda.domain.member.Member;
@@ -72,4 +74,15 @@ private CheersResponse toCheersResponse(List<Cheer> cheers) {
                         imageStorage.getPresignedUrl(cheer.getImageKey())))
                 .toList());
     }
+
+    @Transactional(readOnly = true)
+    public CheersInStoreResponse getCheersByStoreId(Long storeId, int size) {
+        Store store = storeRepository.getById(storeId);
+        List<Cheer> cheers = cheerRepository.findAllByStoreOrderByCreatedAtDesc(store, Pageable.ofSize(size));
+
+        List<CheerInStoreResponse> cheersResponse = cheers.stream()
+                .map(CheerInStoreResponse::new)
+                .toList(); // TODO N+1 문제 해결
+        return new CheersInStoreResponse(cheersResponse);
+    }
 }

src/test/java/eatda/service/store/CheerServiceTest.java

@@ -9,6 +9,7 @@
 import eatda.client.map.StoreSearchResult;
 import eatda.controller.store.CheerRegisterRequest;
 import eatda.controller.store.CheerResponse;
+import eatda.controller.store.CheersInStoreResponse;
 import eatda.controller.store.CheersResponse;
 import eatda.domain.member.Member;
 import eatda.domain.store.Cheer;
@@ -146,5 +147,31 @@ class GetCheers {
                     () -> assertThat(response.cheers().get(1).cheerId()).isEqualTo(cheer2.getId())
             );
         }
+
+        @Nested
+        class GetCheersByStoreId {
+
+            @Test
+            void 요청한_가게의_응원을_최신순으로_반환한다() throws InterruptedException {
+                Member member1 = memberGenerator.generateRegisteredMember("123", "[email protected]", "1234", "01012341234");
+                Member member2 = memberGenerator.generateRegisteredMember("124", "[email protected]", "1235", "01012341235");
+                Member member3 = memberGenerator.generateRegisteredMember("125", "[email protected]", "1236", "01012341236");
+
+                Store store = storeGenerator.generate("123", "서울시 강남구 역삼동 123-45");
+                Cheer cheer1 = cheerGenerator.generateCommon(member1, store);
+                Thread.sleep(5);
+                Cheer cheer2 = cheerGenerator.generateCommon(member2, store);
+                Thread.sleep(5);
+                Cheer cheer3 = cheerGenerator.generateCommon(member3, store);
+
+                CheersInStoreResponse response = cheerService.getCheersByStoreId(store.getId(), 2);
+
+                assertAll(
+                        () -> assertThat(response.cheers()).hasSize(2),
+                        () -> assertThat(response.cheers().get(0).id()).isEqualTo(cheer3.getId()),
+                        () -> assertThat(response.cheers().get(1).id()).isEqualTo(cheer2.getId())
+                );
+            }
+        }
     }
 }