[refactor] Category, Room 도메인 로직 수정

src/main/java/konkuk/thip/common/exception/code/ErrorCode.java

@@ -101,7 +101,8 @@ public enum ErrorCode implements ResponseCode {
     /**
      * 150000 : Category error
      */
-    CATEGORY_NOT_FOUND(HttpStatus.NOT_FOUND, 150000, "존재하지 않는 CATEGORY 입니다.")
+    CATEGORY_NOT_FOUND(HttpStatus.NOT_FOUND, 150000, "존재하지 않는 CATEGORY 입니다."),
+    CATEGORY_NOT_MATCH(HttpStatus.BAD_REQUEST, 150001, "일치하는 카테고리 이름이 없습니다.")
 
     ;
 

src/main/java/konkuk/thip/room/adapter/out/mapper/RoomMapper.java

@@ -3,6 +3,7 @@
 import konkuk.thip.book.adapter.out.jpa.BookJpaEntity;
 import konkuk.thip.room.adapter.out.jpa.CategoryJpaEntity;
 import konkuk.thip.room.adapter.out.jpa.RoomJpaEntity;
+import konkuk.thip.room.domain.Category;
 import konkuk.thip.room.domain.Room;
 import org.springframework.stereotype.Component;
 
@@ -36,7 +37,7 @@ public Room toDomainEntity(RoomJpaEntity roomJpaEntity) {
                 .endDate(roomJpaEntity.getEndDate())
                 .recruitCount(roomJpaEntity.getRecruitCount())
                 .bookId(roomJpaEntity.getBookJpaEntity().getBookId())
-                .categoryId(roomJpaEntity.getCategoryJpaEntity().getCategoryId())
+                .category(Category.from(roomJpaEntity.getCategoryJpaEntity().getValue()))
                 .createdAt(roomJpaEntity.getCreatedAt())
                 .modifiedAt(roomJpaEntity.getModifiedAt())
                 .status(roomJpaEntity.getStatus())

src/main/java/konkuk/thip/room/adapter/out/persistence/RoomCommandPersistenceAdapter.java

@@ -38,7 +38,7 @@ public Long save(Room room) {
                 () -> new EntityNotFoundException(BOOK_NOT_FOUND)
         );
 
-        CategoryJpaEntity categoryJpaEntity = categoryJpaRepository.findById(room.getCategoryId()).orElseThrow(
+        CategoryJpaEntity categoryJpaEntity = categoryJpaRepository.findByValue(room.getCategory().getValue()).orElseThrow(
                 () -> new EntityNotFoundException(CATEGORY_NOT_FOUND)
         );
 

src/main/java/konkuk/thip/room/application/service/RoomCreateService.java

@@ -6,7 +6,6 @@
 import konkuk.thip.common.exception.EntityNotFoundException;
 import konkuk.thip.room.application.port.in.RoomCreateUseCase;
 import konkuk.thip.room.application.port.in.dto.RoomCreateCommand;
-import konkuk.thip.room.application.port.out.CategoryCommandPort;
 import konkuk.thip.room.application.port.out.RoomCommandPort;
 import konkuk.thip.room.domain.Category;
 import konkuk.thip.room.domain.Room;
@@ -19,15 +18,14 @@
 public class RoomCreateService implements RoomCreateUseCase {
 
     private final RoomCommandPort roomCommandPort;
-    private final CategoryCommandPort categoryCommandPort;
     private final BookCommandPort bookCommandPort;
     private final BookApiQueryPort bookApiQueryPort;
 
     @Override
     @Transactional
     public Long createRoom(RoomCreateCommand command, Long userId) {
-        // 1. Category 찾기
-        Category category = categoryCommandPort.findByValue(command.category());
+        // 1. Category 생성
+        Category category = Category.from(command.category());
 
         // 2. Book 찾기, 없으면 Book 로드 및 저장
         Long bookId = resolveBookAndEnsurePage(command.isbn());
@@ -42,7 +40,7 @@ public Long createRoom(RoomCreateCommand command, Long userId) {
                 command.progressEndDate(),
                 command.recruitCount(),
                 bookId,
-                category.getId()
+                category
         );
 
         // TODO : 방 생성한 사람 (= api 호출 토큰에 포함된 userId) 이 해당 방에 속한 멤버라는 사실을 DB에 영속화 해야함

src/main/java/konkuk/thip/room/application/service/RoomSearchService.java

@@ -2,7 +2,7 @@
 
 import konkuk.thip.common.exception.BusinessException;
 import konkuk.thip.room.adapter.in.web.response.RoomSearchResponse;
-import konkuk.thip.room.adapter.out.persistence.CategoryName;
+import konkuk.thip.room.domain.Category;
 import konkuk.thip.room.adapter.out.persistence.RoomSearchSortParam;
 import konkuk.thip.room.application.port.in.RoomSearchUseCase;
 import konkuk.thip.room.application.port.out.RoomQueryPort;
@@ -59,7 +59,7 @@ private String validateCategory(String category) {
             return "";
         }
         try {
-            CategoryName cat = CategoryName.from(category);
+            Category cat = Category.from(category);
             return cat.getValue();
         } catch (IllegalArgumentException ex) {
             throw new BusinessException(CATEGORY_NOT_FOUND, ex);

src/main/java/konkuk/thip/room/domain/Category.java

@@ -1,16 +1,35 @@
 package konkuk.thip.room.domain;
 
-import konkuk.thip.common.entity.BaseDomainEntity;
+import konkuk.thip.common.exception.InvalidStateException;
 import lombok.Getter;
-import lombok.experimental.SuperBuilder;
+import lombok.RequiredArgsConstructor;
+
+import java.util.Arrays;
+
+import static konkuk.thip.common.exception.code.ErrorCode.CATEGORY_NOT_MATCH;
 
 @Getter
-@SuperBuilder
-public class Category extends BaseDomainEntity {
+@RequiredArgsConstructor
+public enum Category {
 
-    private Long id;
+    /**
+     * DB에 저장되어 있는 모든 카테고리들의 이름
+     * TODO : DB에서 value를 통해 카테고리를 조회하는것보다 id로 조회하는게 성능상 좋으니, id 값도 같이 보관 ??
+     */
+    SCIENCE_IT("과학/IT"),
+    Literature("문학"),
+    ART("예술"),
+    SOCIAL_SCIENCE("사회과학"),
+    HUMANITY("인문학");
 
-    private String value;
+    private final String value;
 
-    private Long aliasId;
+    public static Category from(String value) {
+        return Arrays.stream(Category.values())
+                .filter(categoryName -> categoryName.getValue().equals(value))
+                .findFirst()
+                .orElseThrow(
+                        () -> new InvalidStateException(CATEGORY_NOT_MATCH)
+                );
+    }
 }

src/main/java/konkuk/thip/room/domain/Room.java

@@ -40,9 +40,9 @@ public class Room extends BaseDomainEntity {
 
     private Long bookId;
 
-    private Long categoryId;
+    private Category category;
 
-    public static Room withoutId(String title, String description, boolean isPublic, String password, LocalDate startDate, LocalDate endDate, int recruitCount, Long bookId, Long categoryId) {
+    public static Room withoutId(String title, String description, boolean isPublic, String password, LocalDate startDate, LocalDate endDate, int recruitCount, Long bookId, Category category) {
         validateVisibilityPasswordRule(isPublic, password);
         validateDates(startDate, endDate);
 
@@ -60,7 +60,7 @@ public static Room withoutId(String title, String description, boolean isPublic,
                 .endDate(endDate)
                 .recruitCount(recruitCount)
                 .bookId(bookId)
-                .categoryId(categoryId)
+                .category(category)
                 .build();
     }
 

src/test/java/konkuk/thip/common/util/TestEntityFactory.java

@@ -48,7 +48,7 @@ public static BookJpaEntity createBook() {
 
     public static CategoryJpaEntity createCategory(AliasJpaEntity alias) {
         return CategoryJpaEntity.builder()
-                .value("카테고리1")
+                .value("과학/IT")     // 실제 존재하는 값
                 .aliasForCategoryJpaEntity(alias)
                 .build();
     }

src/test/java/konkuk/thip/room/adapter/in/web/RoomCreateAPITest.java

@@ -87,7 +87,7 @@ private void saveUserAndCategory() {
                 .build());
 
         categoryJpaRepository.save(CategoryJpaEntity.builder()
-                .value("소설")
+                .value("과학/IT")     // 실제 카테고리 값
                 .aliasForCategoryJpaEntity(alias)
                 .build());
     }
@@ -121,11 +121,11 @@ private void saveBookWithoutPageCount() {
     private Map<String, Object> buildRoomCreateRequest() {
         Map<String, Object> request = new HashMap<>();
         request.put("isbn", "9788954682152");
-        request.put("category", "소설");
+        request.put("category", "과학/IT");           // 실제 카테고리 값
         request.put("roomName", "방이름");
         request.put("description", "방설명");
-        request.put("progressStartDate", "2025.07.10");
-        request.put("progressEndDate", "2025.08.10");
+        request.put("progressStartDate", LocalDate.now().plusDays(1).format(DateTimeFormatter.ofPattern("yyyy.MM.dd")));
+        request.put("progressEndDate", LocalDate.now().plusDays(30).format(DateTimeFormatter.ofPattern("yyyy.MM.dd")));
         request.put("recruitCount", 3);
         request.put("password", null);
         request.put("isPublic", true);

src/test/java/konkuk/thip/room/adapter/in/web/RoomVerifyPasswordAPITest.java

@@ -96,7 +96,7 @@ void setUp() {
         userId = user.getUserId();
 
         CategoryJpaEntity categoryJpaEntity = categoryJpaRepository.save(CategoryJpaEntity.builder()
-                .value("소설")
+                .value("과학/IT")
                 .aliasForCategoryJpaEntity(alias)
                 .build());