[feat] 족보 주인인지 여부 리턴하는 API 구현

src/main/java/org/hankki/hankkiserver/api/favorite/controller/FavoriteController.java

@@ -10,6 +10,7 @@
 import org.hankki.hankkiserver.api.favorite.service.FavoriteQueryService;
 import org.hankki.hankkiserver.api.favorite.service.command.*;
 import org.hankki.hankkiserver.api.favorite.service.response.FavoriteGetResponse;
+import org.hankki.hankkiserver.api.favorite.service.response.FavoriteOwnershipGetResponse;
 import org.hankki.hankkiserver.api.favorite.service.response.FavoritesWithStatusGetResponse;
 import org.hankki.hankkiserver.auth.UserId;
 import org.hankki.hankkiserver.common.code.CommonSuccessCode;
@@ -72,4 +73,9 @@ public HankkiResponse<Void> createSharedFavorite(@UserId final Long userId, @Pat
     favoriteCommandService.createSharedFavorite(FavoriteSharedPostCommand.of(userId, favoriteId, request.title(), request.details()));
     return HankkiResponse.success(CommonSuccessCode.CREATED);
   }
+
+  @GetMapping("/favorites/{favoriteId}/ownership")
+  public HankkiResponse<FavoriteOwnershipGetResponse> checkFavoriteOwnership(@UserId Long userId, @PathVariable("favoriteId") final long favoriteId) {
+    return HankkiResponse.success(CommonSuccessCode.OK, favoriteQueryService.checkFavoriteOwnership(FavoriteOwnershipGetCommand.of(userId, favoriteId)));
+  }
 }

src/main/java/org/hankki/hankkiserver/api/favorite/service/FavoriteFinder.java

@@ -40,4 +40,4 @@ protected Favorite findByIdWithFavoriteStore(final Long id) {
   protected Optional<Favorite> findByNameAndUser(final String name, final User user) {
     return favoriteRepository.findByNameAndUser(name, user);
   }
-}
+}

src/main/java/org/hankki/hankkiserver/api/favorite/service/FavoriteQueryService.java

@@ -2,9 +2,11 @@
 
 import java.util.ArrayList;
 import lombok.RequiredArgsConstructor;
+import org.hankki.hankkiserver.api.favorite.service.command.FavoriteOwnershipGetCommand;
 import org.hankki.hankkiserver.api.favorite.service.command.FavoritesGetCommand;
 import org.hankki.hankkiserver.api.favorite.service.command.FavoritesWithStatusGetCommand;
 import org.hankki.hankkiserver.api.favorite.service.response.FavoriteGetResponse;
+import org.hankki.hankkiserver.api.favorite.service.response.FavoriteOwnershipGetResponse;
 import org.hankki.hankkiserver.api.favorite.service.response.FavoritesWithStatusGetResponse;
 import org.hankki.hankkiserver.api.store.service.StoreFinder;
 import org.hankki.hankkiserver.domain.favorite.model.Favorite;
@@ -56,4 +58,16 @@ private List<Store> findStoresInFavorite(final Favorite favorite){
   private boolean favoriteHasNoStore(final Favorite favorite) {
     return favorite.getFavoriteStores().isEmpty();
   }
-}
+
+  public FavoriteOwnershipGetResponse checkFavoriteOwnership(final FavoriteOwnershipGetCommand command) {
+     return FavoriteOwnershipGetResponse.of(isOwner(getOwnerIdById(command.favoriteId()), command.userId()));
+  }
+
+  private long getOwnerIdById(final long id) {
+    return favoriteFinder.findById(id).getUser().getId();
+  }
+
+  private boolean isOwner(final long ownerId, final long userId) {
+    return ownerId == userId;
+  }
+}

src/main/java/org/hankki/hankkiserver/api/favorite/service/command/FavoriteOwnershipGetCommand.java

@@ -0,0 +1,10 @@
+package org.hankki.hankkiserver.api.favorite.service.command;
+
+public record FavoriteOwnershipGetCommand(
+    long userId,
+    long favoriteId
+) {
+  public static FavoriteOwnershipGetCommand of(final long userId, final long favoriteId) {
+    return new FavoriteOwnershipGetCommand(userId, favoriteId);
+  }
+}

src/main/java/org/hankki/hankkiserver/api/favorite/service/response/FavoriteOwnershipGetResponse.java

@@ -0,0 +1,9 @@
+package org.hankki.hankkiserver.api.favorite.service.response;
+
+public record FavoriteOwnershipGetResponse(
+    boolean isOwner
+) {
+  public static FavoriteOwnershipGetResponse of(final boolean isOwner) {
+    return new FavoriteOwnershipGetResponse(isOwner);
+  }
+}

src/main/java/org/hankki/hankkiserver/domain/favorite/repository/FavoriteRepository.java

@@ -26,4 +26,4 @@ public interface FavoriteRepository extends JpaRepository<Favorite, Long> {
   Optional<Favorite> findByIdWithFavoriteStore(@Param("favoriteId") Long favoriteId);
 
   Optional<Favorite> findByNameAndUser(String title, User user);
-}
+}