feat: 메뉴 카테고리 목록 조회

src/main/java/in/koreatech/koin/domain/shop/controller/ShopController.java

@@ -5,6 +5,7 @@
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RestController;
 
+import in.koreatech.koin.domain.shop.dto.MenuCategoriesResponse;
 import in.koreatech.koin.domain.shop.dto.ShopMenuResponse;
 import in.koreatech.koin.domain.shop.service.ShopService;
 import lombok.RequiredArgsConstructor;
@@ -20,4 +21,10 @@ public ResponseEntity<ShopMenuResponse> findMenu(@PathVariable Long shopId, @Pat
         ShopMenuResponse shopMenu = shopService.findMenu(menuId);
         return ResponseEntity.ok(shopMenu);
     }
+
+    @GetMapping("/shops/{shopId}/menus/categories")
+    public ResponseEntity<MenuCategoriesResponse> findMenuCategories(@PathVariable Long shopId) {
+        MenuCategoriesResponse menuCategories = shopService.getMenuCategories(shopId);
+        return ResponseEntity.ok(menuCategories);
+    }
 }

src/main/java/in/koreatech/koin/domain/shop/dto/MenuCategoriesResponse.java

@@ -0,0 +1,25 @@
+package in.koreatech.koin.domain.shop.dto;
+
+import java.util.List;
+
+import com.fasterxml.jackson.databind.PropertyNamingStrategies.SnakeCaseStrategy;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
+import in.koreatech.koin.domain.shop.model.MenuCategory;
+
+@JsonNaming(value = SnakeCaseStrategy.class)
+public record MenuCategoriesResponse(Long count, List<MenuCategoryResponse> menuCategories) {
+    public static MenuCategoriesResponse from(List<MenuCategory> menuCategories) {
+        List<MenuCategoryResponse> categories = menuCategories.stream()
+            .map(menuCategory -> MenuCategoryResponse.of(menuCategory.getId(), menuCategory.getName()))
+            .toList();
+
+        return new MenuCategoriesResponse((long)categories.size(), categories);
+    }
+
+    private record MenuCategoryResponse(Long id, String name) {
+        public static MenuCategoryResponse of(Long id, String name) {
+            return new MenuCategoryResponse(id, name);
+        }
+    }
+}

src/main/java/in/koreatech/koin/domain/shop/repository/MenuCategoryRepository.java

@@ -0,0 +1,11 @@
+package in.koreatech.koin.domain.shop.repository;
+
+import java.util.List;
+
+import org.springframework.data.repository.Repository;
+
+import in.koreatech.koin.domain.shop.model.MenuCategory;
+
+public interface MenuCategoryRepository extends Repository<MenuCategory, Long> {
+    List<MenuCategory> findAllByShopId(Long shopId);
+}

src/main/java/in/koreatech/koin/domain/shop/service/ShopService.java

@@ -5,10 +5,12 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import in.koreatech.koin.domain.shop.dto.MenuCategoriesResponse;
+import in.koreatech.koin.domain.shop.dto.ShopMenuResponse;
 import in.koreatech.koin.domain.shop.model.Menu;
 import in.koreatech.koin.domain.shop.model.MenuCategory;
 import in.koreatech.koin.domain.shop.model.MenuCategoryMap;
-import in.koreatech.koin.domain.shop.dto.ShopMenuResponse;
+import in.koreatech.koin.domain.shop.repository.MenuCategoryRepository;
 import in.koreatech.koin.domain.shop.repository.MenuRepository;
 import lombok.RequiredArgsConstructor;
 
@@ -18,6 +20,7 @@
 public class ShopService {
 
     private final MenuRepository menuRepository;
+    private final MenuCategoryRepository menuCategoryRepository;
 
     public ShopMenuResponse findMenu(Long menuId) {
         Menu menu = menuRepository.findById(menuId)
@@ -37,4 +40,10 @@ private ShopMenuResponse createShopMenuResponse(Menu menu, List<MenuCategory> me
         }
         return ShopMenuResponse.createForSingleOption(menu, menuCategories);
     }
+
+    public MenuCategoriesResponse getMenuCategories(Long shopId) {
+        //TODO 존재하는 상점인지 검증하고, 없다면 401를 반환하여야 한다. 작업시점: 상점 도메인 조회 기능 추가시
+        List<MenuCategory> menuCategories = menuCategoryRepository.findAllByShopId(shopId);
+        return MenuCategoriesResponse.from(menuCategories);
+    }
 }

src/test/java/in/koreatech/koin/acceptance/ShopApiTest.java

@@ -177,4 +177,66 @@ void findMenuMultipleOption() {
             }
         );
     }
+
+    @Test
+    @DisplayName("상점의 메뉴 카테고리들을 조회한다.")
+    void findShopMenuCategories() {
+        // given
+        final long SHOP_ID = 1L;
+
+        Menu menu = Menu.builder()
+            .shopId(SHOP_ID)
+            .name("짜장면")
+            .description("맛있는 짜장면")
+            .build();
+
+        MenuCategory menuCategory1 = MenuCategory.builder()
+            .shopId(SHOP_ID)
+            .name("이벤트 메뉴")
+            .build();
+
+        MenuCategory menuCategory2 = MenuCategory.builder()
+            .shopId(SHOP_ID)
+            .name("메인 메뉴")
+            .build();
+
+        MenuCategoryMap menuCategoryMap1 = MenuCategoryMap.create();
+        MenuCategoryMap menuCategoryMap2 = MenuCategoryMap.create();
+
+        // when then
+        menuCategoryMap1.map(menu, menuCategory1);
+        menuCategoryMap2.map(menu, menuCategory2);
+
+        menuRepository.save(menu);
+
+        ExtractableResponse<Response> response = RestAssured
+            .given()
+            .log().all()
+            .when()
+            .log().all()
+            .get("/shops/{shopId}/menus/categories", menu.getShopId())
+            .then()
+            .log().all()
+            .statusCode(HttpStatus.OK.value())
+            .extract();
+
+        SoftAssertions.assertSoftly(
+            softly -> {
+                softly.assertThat(response.body().jsonPath().getLong("count")).isEqualTo(2);
+
+                softly.assertThat(response.body().jsonPath().getList("menu_categories"))
+                    .hasSize(2);
+
+                softly.assertThat(response.body().jsonPath().getLong("menu_categories[0].id"))
+                    .isEqualTo(menuCategory1.getId());
+                softly.assertThat(response.body().jsonPath().getString("menu_categories[0].name"))
+                    .isEqualTo(menuCategory1.getName());
+
+                softly.assertThat(response.body().jsonPath().getLong("menu_categories[1].id"))
+                    .isEqualTo(menuCategory2.getId());
+                softly.assertThat(response.body().jsonPath().getString("menu_categories[1].name"))
+                    .isEqualTo(menuCategory2.getName());
+            }
+        );
+    }
 }