Feat: 링크 @Entity에 링크 번들 ID 필드를 추가한다.

src/main/java/com/seong/shoutlink/domain/link/Link.java

@@ -11,6 +11,11 @@ public class Link {
 
 
     public Link(String url, String description) {
+        this(null, url, description);
+    }
+
+    public Link(Long linkId, String url, String description) {
+        this.linkId = linkId;
         this.url = url;
         this.description = description;
     }

src/main/java/com/seong/shoutlink/domain/link/LinkWithLinkBundle.java

@@ -0,0 +1,16 @@
+package com.seong.shoutlink.domain.link;
+
+import com.seong.shoutlink.domain.linkbundle.LinkBundle;
+import lombok.Getter;
+
+@Getter
+public class LinkWithLinkBundle {
+
+    private final Link link;
+    private final LinkBundle linkBundle;
+
+    public LinkWithLinkBundle(Link link, LinkBundle linkBundle) {
+        this.link = link;
+        this.linkBundle = linkBundle;
+    }
+}

src/main/java/com/seong/shoutlink/domain/link/controller/LinkController.java

@@ -27,6 +27,7 @@ public ResponseEntity<CreateLinkResponse> createLink(
         @Valid @RequestBody CreateLinkRequest request) {
         CreateLinkResponse response = linkService.createLink(new CreateLinkCommand(
             memberId,
+            request.linkBundleId(),
             request.url(),
             request.description()));
         return ResponseEntity.status(HttpStatus.CREATED).body(response);

src/main/java/com/seong/shoutlink/domain/link/controller/request/CreateLinkRequest.java

@@ -1,8 +1,11 @@
 package com.seong.shoutlink.domain.link.controller.request;
 
 import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
 
 public record CreateLinkRequest(
+    @NotNull(message = "링크 묶음 ID는 필수값입니다.")
+    Long linkBundleId,
     @NotBlank(message = "링크 url은 필수값입니다.")
     String url,
     String description) {

src/main/java/com/seong/shoutlink/domain/link/repository/LinkEntity.java

@@ -1,6 +1,8 @@
 package com.seong.shoutlink.domain.link.repository;
 
 import com.seong.shoutlink.domain.link.Link;
+import com.seong.shoutlink.domain.link.LinkWithLinkBundle;
+import com.seong.shoutlink.domain.linkbundle.LinkBundle;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
@@ -20,13 +22,20 @@ public class LinkEntity {
 
     private String url;
     private String description;
+    private Long linkBundleId;
 
-    private LinkEntity(String url, String description) {
+    private LinkEntity(String url, String description, Long linkBundleId) {
         this.url = url;
         this.description = description;
+        this.linkBundleId = linkBundleId;
     }
 
-    public static LinkEntity create(Link link) {
-        return new LinkEntity(link.getUrl(), link.getDescription());
+    public static LinkEntity create(LinkWithLinkBundle linkWithLinkBundle) {
+        Link link = linkWithLinkBundle.getLink();
+        LinkBundle linkBundle = linkWithLinkBundle.getLinkBundle();
+        return new LinkEntity(
+            link.getUrl(),
+            link.getDescription(),
+            linkBundle.getLinkBundleId());
     }
 }

src/main/java/com/seong/shoutlink/domain/link/repository/LinkRepositoryImpl.java

@@ -1,6 +1,6 @@
 package com.seong.shoutlink.domain.link.repository;
 
-import com.seong.shoutlink.domain.link.Link;
+import com.seong.shoutlink.domain.link.LinkWithLinkBundle;
 import com.seong.shoutlink.domain.link.service.LinkRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Repository;
@@ -12,8 +12,8 @@ public class LinkRepositoryImpl implements LinkRepository {
     private final LinkJpaRepository linkJpaRepository;
 
     @Override
-    public Long save(Link link) {
-        LinkEntity linkEntity = linkJpaRepository.save(LinkEntity.create(link));
+    public Long save(LinkWithLinkBundle linkWithLinkBundle) {
+        LinkEntity linkEntity = linkJpaRepository.save(LinkEntity.create(linkWithLinkBundle));
         return linkEntity.getLinkId();
     }
 }

src/main/java/com/seong/shoutlink/domain/link/service/LinkRepository.java

@@ -1,8 +1,8 @@
 package com.seong.shoutlink.domain.link.service;
 
-import com.seong.shoutlink.domain.link.Link;
+import com.seong.shoutlink.domain.link.LinkWithLinkBundle;
 
 public interface LinkRepository {
 
-    Long save(Link link);
+    Long save(LinkWithLinkBundle linkWithLinkBundle);
 }

src/main/java/com/seong/shoutlink/domain/link/service/LinkService.java

@@ -1,10 +1,15 @@
 package com.seong.shoutlink.domain.link.service;
 
 import com.seong.shoutlink.domain.common.EventPublisher;
+import com.seong.shoutlink.domain.exception.ErrorCode;
+import com.seong.shoutlink.domain.exception.ShoutLinkException;
 import com.seong.shoutlink.domain.link.Link;
+import com.seong.shoutlink.domain.link.LinkWithLinkBundle;
 import com.seong.shoutlink.domain.link.service.event.CreateLinkEvent;
 import com.seong.shoutlink.domain.link.service.request.CreateLinkCommand;
 import com.seong.shoutlink.domain.link.service.response.CreateLinkResponse;
+import com.seong.shoutlink.domain.linkbundle.LinkBundle;
+import com.seong.shoutlink.domain.linkbundle.service.LinkBundleRepository;
 import com.seong.shoutlink.domain.member.service.MemberRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -16,15 +21,21 @@ public class LinkService {
 
     private final MemberRepository memberRepository;
     private final LinkRepository linkRepository;
+    private final LinkBundleRepository linkBundleRepository;
     private final EventPublisher eventPublisher;
 
     @Transactional
     public CreateLinkResponse createLink(CreateLinkCommand command) {
-//        Member member = memberRepository.findById(command.memberId())
-//            .orElseThrow(() -> new ShoutLinkException("존재하지 않는 사용자입니다.", ErrorCode.NOT_FOUND));
+        LinkBundle linkBundle = getLinkBundle(command.linkBundleId());
         Link link = new Link(command.url(), command.description());
-        Long linkId = linkRepository.save(link);
+        LinkWithLinkBundle linkWithLinkBundle = new LinkWithLinkBundle(link, linkBundle);
+        Long linkId = linkRepository.save(linkWithLinkBundle);
         eventPublisher.publishEvent(new CreateLinkEvent(command.url()));
         return new CreateLinkResponse(linkId);
     }
+
+    private LinkBundle getLinkBundle(Long linkBundleId) {
+        return linkBundleRepository.findById(linkBundleId)
+            .orElseThrow(() -> new ShoutLinkException("존재하지 않는 링크 번들입니다.", ErrorCode.NOT_FOUND));
+    }
 }

src/main/java/com/seong/shoutlink/domain/link/service/request/CreateLinkCommand.java

@@ -1,5 +1,5 @@
 package com.seong.shoutlink.domain.link.service.request;
 
-public record CreateLinkCommand(Long memberId, String url, String description) {
+public record CreateLinkCommand(Long memberId, Long linkBundleId, String url, String description) {
 
 }

src/main/java/com/seong/shoutlink/domain/linkbundle/LinkBundle.java

@@ -10,12 +10,17 @@ public class LinkBundle {
     private Long linkBundleId;
     private String description;
     private boolean isDefault;
-    private Member member;
+    private Long memberId;
 
     public LinkBundle(String description, boolean isDefault, Member member) {
+        this(null, description, isDefault, member.getMemberId());
+    }
+
+    public LinkBundle(Long linkBundleId, String description, boolean isDefault, Long memberId) {
+        this.linkBundleId = linkBundleId;
         this.description = description;
         this.isDefault = isDefault;
-        this.member = member;
+        this.memberId = memberId;
     }
 
     public void initId(Long linkBundleId) {

src/main/java/com/seong/shoutlink/domain/linkbundle/repository/LinkBundleEntity.java

@@ -38,6 +38,15 @@ public static LinkBundleEntity create(LinkBundle linkBundle) {
             linkBundle.getLinkBundleId(),
             linkBundle.getDescription(),
             linkBundle.isDefault(),
-            linkBundle.getMember().getMemberId());
+            linkBundle.getMemberId());
+    }
+
+    public LinkBundle toDomain() {
+        return new LinkBundle(
+            linkBundleId,
+            description,
+            isDefault,
+            memberId
+        );
     }
 }

src/main/java/com/seong/shoutlink/domain/linkbundle/repository/LinkBundleRepositoryImpl.java

@@ -3,6 +3,7 @@
 import com.seong.shoutlink.domain.linkbundle.LinkBundle;
 import com.seong.shoutlink.domain.linkbundle.service.LinkBundleRepository;
 import com.seong.shoutlink.domain.member.Member;
+import java.util.Optional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Repository;
 
@@ -24,4 +25,10 @@ public Long save(LinkBundle linkBundle) {
     public void updateDefaultBundleFalse(Member member) {
         linkBundleJpaRepository.updateDefaultBundleFalse(member.getMemberId());
     }
+
+    @Override
+    public Optional<LinkBundle> findById(Long linkBundleId) {
+        return linkBundleJpaRepository.findById(linkBundleId)
+            .map(LinkBundleEntity::toDomain);
+    }
 }

src/main/java/com/seong/shoutlink/domain/linkbundle/service/LinkBundleRepository.java

@@ -2,10 +2,13 @@
 
 import com.seong.shoutlink.domain.linkbundle.LinkBundle;
 import com.seong.shoutlink.domain.member.Member;
+import java.util.Optional;
 
 public interface LinkBundleRepository {
 
     Long save(LinkBundle linkBundle);
 
     void updateDefaultBundleFalse(Member member);
+
+    Optional<LinkBundle> findById(Long linkBundleId);
 }

src/test/java/com/seong/shoutlink/domain/link/controller/LinkControllerTest.java

@@ -25,7 +25,7 @@ class LinkControllerTest extends BaseControllerTest {
     @DisplayName("성공: 링크 생성 API 호출 시")
     void createLink() throws Exception {
         //given
-        CreateLinkRequest request = new CreateLinkRequest("https://hseong.tistory.com/", "내 블로그");
+        CreateLinkRequest request = new CreateLinkRequest(1L, "https://hseong.tistory.com/", "내 블로그");
         CreateLinkResponse response = new CreateLinkResponse(1L);
         given(linkService.createLink(any())).willReturn(response);
 
@@ -42,6 +42,7 @@ void createLink() throws Exception {
                     headerWithName(AUTHORIZATION).description("사용자 액세스 토큰")
                 ),
                 requestFields(
+                    fieldWithPath("linkBundleId").type(JsonFieldType.NUMBER).description("링크 번들 ID"),
                     fieldWithPath("url").type(JsonFieldType.STRING).description("링크 url"),
                     fieldWithPath("description").type(JsonFieldType.STRING).description("링크 설명")
                         .optional()

src/test/java/com/seong/shoutlink/domain/link/repository/FakeLinkRepository.java

@@ -1,6 +1,7 @@
 package com.seong.shoutlink.domain.link.repository;
 
 import com.seong.shoutlink.domain.link.Link;
+import com.seong.shoutlink.domain.link.LinkWithLinkBundle;
 import com.seong.shoutlink.domain.link.service.LinkRepository;
 import java.util.HashMap;
 import java.util.Map;
@@ -10,9 +11,14 @@ public class FakeLinkRepository implements LinkRepository {
     private final Map<Long, Link> memory = new HashMap<>();
 
     @Override
-    public Long save(Link link) {
+    public Long save(LinkWithLinkBundle linkWithLinkBundle) {
+        long nextId = getNextId();
+        memory.put(nextId, linkWithLinkBundle.getLink());
+        return nextId;
+    }
+
+    private long getNextId() {
         long nextId = memory.keySet().size() + 1;
-        memory.put(nextId, link);
         return nextId;
     }
-}
+}

src/test/java/com/seong/shoutlink/domain/link/service/LinkServiceTest.java

@@ -6,7 +6,10 @@
 import com.seong.shoutlink.domain.link.repository.FakeLinkRepository;
 import com.seong.shoutlink.domain.link.service.request.CreateLinkCommand;
 import com.seong.shoutlink.domain.link.service.response.CreateLinkResponse;
+import com.seong.shoutlink.domain.linkbundle.repository.FakeLinkBundleRepository;
+import com.seong.shoutlink.domain.member.Member;
 import com.seong.shoutlink.domain.member.repository.StubMemberRepository;
+import com.seong.shoutlink.fixture.LinkBundleFixture;
 import com.seong.shoutlink.fixture.MemberFixture;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
@@ -22,22 +25,26 @@ class CreateLinkTest {
         private LinkService linkService;
         private StubMemberRepository memberRepository;
         private FakeLinkRepository linkRepository;
+        private FakeLinkBundleRepository linkBundleRepository;
         private StubEventPublisher eventPublisher;
 
         @BeforeEach
         void setUp() {
-            memberRepository = new StubMemberRepository(MemberFixture.member());
+            Member member = MemberFixture.member();
+            memberRepository = new StubMemberRepository(member);
             linkRepository = new FakeLinkRepository();
+            linkBundleRepository = new FakeLinkBundleRepository(LinkBundleFixture.linkBundle(member));
             eventPublisher = new StubEventPublisher();
-            linkService = new LinkService(memberRepository, linkRepository, eventPublisher);
+            linkService = new LinkService(memberRepository, linkRepository, linkBundleRepository,
+                eventPublisher);
         }
 
         @Test
         @DisplayName("성공: 링크 저장됨")
         void createLink() {
             //given
             CreateLinkCommand command = new CreateLinkCommand(1L,
-                "https://hseong.tistory.com/", "내 블로그");
+                1L, "https://hseong.tistory.com/", "내 블로그");
 
             //when
             CreateLinkResponse response = linkService.createLink(command);
@@ -51,7 +58,7 @@ void createLink() {
         void createLink_ThenPublishCreateLinkEvent() {
             //given
             CreateLinkCommand command = new CreateLinkCommand(1L,
-                "https://hseong.tistory.com/", "내 블로그");
+                1L, "https://hseong.tistory.com/", "내 블로그");
 
             //when
             CreateLinkResponse response = linkService.createLink(command);

src/test/java/com/seong/shoutlink/domain/linkbundle/repository/FakeLinkBundleRepository.java

@@ -6,11 +6,18 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 
 public class FakeLinkBundleRepository implements LinkBundleRepository {
 
     private final Map<Long, LinkBundle> memory = new HashMap<>();
 
+    public FakeLinkBundleRepository(LinkBundle... linkBundles) {
+        for (LinkBundle linkBundle : linkBundles) {
+            memory.put(getNextId(), linkBundle);
+        }
+    }
+
     @Override
     public Long save(LinkBundle linkBundle) {
         long nextId = getNextId();
@@ -22,16 +29,21 @@ public Long save(LinkBundle linkBundle) {
     @Override
     public void updateDefaultBundleFalse(Member member) {
         List<LinkBundle> defaultLinkBundle = memory.values().stream()
-            .filter(linkBundle -> linkBundle.isDefault() && linkBundle.getMember().equals(member))
+            .filter(linkBundle -> linkBundle.isDefault() && linkBundle.getMemberId().equals(member.getMemberId()))
             .toList();
         defaultLinkBundle.forEach(lb -> {
             memory.remove(lb.getLinkBundleId());
             memory.put(lb.getLinkBundleId(),
-                new LinkBundle(lb.getDescription(), false, lb.getMember()));
+                new LinkBundle(lb.getDescription(), false, member));
         });
     }
 
     private long getNextId() {
         return memory.keySet().size() + 1;
     }
+
+    @Override
+    public Optional<LinkBundle> findById(Long linkBundleId) {
+        return memory.values().stream().findFirst();
+    }
 }

src/test/java/com/seong/shoutlink/fixture/LinkBundleFixture.java

@@ -0,0 +1,15 @@
+package com.seong.shoutlink.fixture;
+
+import com.seong.shoutlink.domain.linkbundle.LinkBundle;
+import com.seong.shoutlink.domain.member.Member;
+
+public final class LinkBundleFixture {
+
+    public static final long LINK_BUNDLE_ID = 1L;
+    public static final String DESCRIPTION = "기본 분류";
+    public static final boolean IS_DEFAULT = true;
+
+    public static LinkBundle linkBundle(Member member) {
+        return new LinkBundle(LINK_BUNDLE_ID, DESCRIPTION, IS_DEFAULT, member.getMemberId());
+    }
+}

src/test/java/com/seong/shoutlink/fixture/LinkFixture.java

@@ -0,0 +1,2 @@
+package com.seong.shoutlink.fixture;public class LinkFixture {
+}