✨ feat : 메뉴 상세 조회 API 구현

build.gradle

@@ -25,6 +25,7 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 	compileOnly 'org.projectlombok:lombok'
 	runtimeOnly 'com.mysql:mysql-connector-j'

src/main/java/com/example/Centralthon/domain/menu/exception/MenuErrorCode.java

@@ -7,7 +7,7 @@
 @Getter
 @AllArgsConstructor
 public enum MenuErrorCode implements BaseResponseCode {
-    MENU_NOT_FOUND("MENU_NOT_FOUND_404_1",404,"반경 내에 반찬 매물이 없습니다.");
+    MENU_NOT_FOUND("MENU_NOT_FOUND_404_1",404,"존재하지 않는 메뉴 입니다.");
 
     private final String code;
     private final int httpStatus;

src/main/java/com/example/Centralthon/domain/menu/exception/MenuNotFoundException.java

@@ -3,7 +3,5 @@
 import com.example.Centralthon.global.exception.BaseException;
 
 public class MenuNotFoundException extends BaseException {
-    public MenuNotFoundException() {
-        super(MenuErrorCode.MENU_NOT_FOUND);
-    }
+    public MenuNotFoundException() {super(MenuErrorCode.MENU_NOT_FOUND);}
 }

src/main/java/com/example/Centralthon/domain/menu/service/MenuService.java

@@ -1,12 +1,14 @@
 package com.example.Centralthon.domain.menu.service;
 
+import com.example.Centralthon.domain.menu.web.dto.*;
 import com.example.Centralthon.domain.menu.web.dto.NearbyMenusRes;
 import com.example.Centralthon.domain.menu.web.dto.StoresByMenuRes;
-import jakarta.validation.constraints.NotNull;
 import java.util.List;
 
 public interface MenuService {
     List<NearbyMenusRes> nearbyMenus(double latitude, double longitude);
 
     List<StoresByMenuRes> storesByMenu(String name, double lat, double lng);
+
+    List<MenuDetailsRes> details(MenuIdsReq menus);
 }

src/main/java/com/example/Centralthon/domain/menu/service/MenuServiceImpl.java

@@ -3,8 +3,7 @@
 import com.example.Centralthon.domain.menu.entity.Menu;
 import com.example.Centralthon.domain.menu.exception.MenuNotFoundException;
 import com.example.Centralthon.domain.menu.repository.MenuRepository;
-import com.example.Centralthon.domain.menu.web.dto.NearbyMenusRes;
-import com.example.Centralthon.domain.menu.web.dto.StoresByMenuRes;
+import com.example.Centralthon.domain.menu.web.dto.*;
 import com.example.Centralthon.domain.store.entity.Store;
 import com.example.Centralthon.global.util.geo.BoundingBox;
 import com.example.Centralthon.global.util.geo.GeoUtils;
@@ -13,6 +12,8 @@
 import org.springframework.transaction.annotation.Transactional;
 
 import java.time.LocalDateTime;
+import java.util.*;
+import java.util.stream.Collectors;
 import java.util.Comparator;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -75,4 +76,17 @@ public List<StoresByMenuRes> storesByMenu(String name, double lat, double lng) {
                 ))
                 .toList();
     }
+
+    @Override
+    @Transactional(readOnly=true)
+    public List<MenuDetailsRes> details(MenuIdsReq menus) {
+        List<Menu> menuList = menuRepository.findAllById(menus.getMenuIds());
+
+        if (menuList.isEmpty()) {throw new MenuNotFoundException();}
+
+        return menuList.stream()
+                .map(menu -> MenuDetailsRes.from(menu))
+                .toList();
+    }
+
 }

src/main/java/com/example/Centralthon/domain/menu/web/controller/MenuController.java

@@ -1,9 +1,15 @@
 package com.example.Centralthon.domain.menu.web.controller;
 
 import com.example.Centralthon.domain.menu.service.MenuService;
+
+import com.example.Centralthon.domain.menu.web.dto.*;
+import com.example.Centralthon.global.response.SuccessResponse;
+import jakarta.validation.Valid;
+
 import com.example.Centralthon.domain.menu.web.dto.NearbyMenusRes;
 import com.example.Centralthon.domain.menu.web.dto.StoresByMenuRes;
 import com.example.Centralthon.global.response.SuccessResponse;
+
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -40,4 +46,12 @@ public ResponseEntity<SuccessResponse<List<StoresByMenuRes>>> storesByMenu(
 
         return ResponseEntity.status(HttpStatus.OK).body(SuccessResponse.from(stores));
     }
+
+    //메뉴 상세 조회
+    @PostMapping("/details")
+    public ResponseEntity<SuccessResponse<List<MenuDetailsRes>>> details(@RequestBody @Valid MenuIdsReq menus){
+        List<MenuDetailsRes> menuList = menuService.details(menus);
+
+        return ResponseEntity.status(HttpStatus.OK).body(SuccessResponse.from(menuList));
+    }
 }

src/main/java/com/example/Centralthon/domain/menu/web/dto/MenuDetailsRes.java

@@ -0,0 +1,36 @@
+package com.example.Centralthon.domain.menu.web.dto;
+
+import com.example.Centralthon.domain.menu.entity.Menu;
+import com.example.Centralthon.domain.menu.entity.enums.MenuCategory;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+public record MenuDetailsRes(
+        long menuId,
+        String name,
+        MenuCategory category,
+        int costPrice,
+        int salePrice,
+        int salePercent,
+        String storeName
+) {
+    public static MenuDetailsRes from(Menu menu) {
+        return new MenuDetailsRes(
+                menu.getId(),
+                menu.getName(),
+                menu.getCategory(),
+                menu.getCostPrice(),
+                menu.getSalePrice(),
+                calculateDiscount(menu.getCostPrice(), menu.getSalePrice()),
+                menu.getStore().getName()
+        );
+    }
+
+    private static int calculateDiscount(int cost, int sale) {
+        return BigDecimal.valueOf(cost - sale)
+                .multiply(BigDecimal.valueOf(100))
+                .divide(BigDecimal.valueOf(cost), 0, RoundingMode.HALF_UP)
+                .intValue();
+    }
+}

src/main/java/com/example/Centralthon/domain/menu/web/dto/MenuIdsReq.java

@@ -0,0 +1,13 @@
+package com.example.Centralthon.domain.menu.web.dto;
+
+import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.NotNull;
+import lombok.Getter;
+import java.util.List;
+
+@Getter
+public class MenuIdsReq {
+    @NotEmpty(message = "menuIds 리스트가 비어있습니다.")
+    private List<@NotNull(message = "menuId는 null일 수 없습니다.") Long> menuIds;
+}

src/main/java/com/example/Centralthon/global/exception/GlobalExceptionHandler.java

@@ -10,7 +10,9 @@
 
 import org.springframework.web.HttpRequestMethodNotSupportedException;
 import org.springframework.web.bind.MethodArgumentNotValidException;
+
 import org.springframework.web.bind.MissingServletRequestParameterException;
+
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;

src/main/java/com/example/Centralthon/global/response/SuccessResponse.java

@@ -21,7 +21,6 @@ public SuccessResponse(T data, BaseResponseCode baseResponseCode) {
         this.data = data;
     }
 
-    // 201 Created 응답
     public static <T> SuccessResponse<T> created(T data) {
         return new SuccessResponse<>(data, SuccessResponseCode.SUCCESS_CREATED);
     }