[#7] Feat: exception handling

Author: 김산

src/main/java/com/example/helper/controller/MealController.java

@@ -10,12 +10,14 @@
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import org.springframework.web.server.ResponseStatusException;
 
 
 @RestController // @Controller + @ResponseBody. return이 view가 아닌, http body에 직접 쓰여짐.
@@ -253,8 +255,12 @@ public DateMealDto DateMealRead(
                 .date(day.toString())
                 .build();
 
-        DateMealDto dateMealDtoList = dateMealService.getDateMenus(dateReqDto);
-
-        return dateMealDtoList;
+        try {
+            DateMealDto dateMealDto = dateMealService.getDateMenus(dateReqDto);
+            return dateMealDto;
+        } catch (IllegalStateException e) {
+            throw new ResponseStatusException(
+                    HttpStatus.NOT_ACCEPTABLE, e.getMessage());
+        }
     }
 }

src/main/java/com/example/helper/service/DateMealService.java

@@ -28,7 +28,9 @@ public DateMealDto getDateMenus(DateReqDto dateReqDto) {
                 .build();
 
         // TODO: exception handling(target data is not in DB)
-
+        if (checkMenusEmpty(result)) {
+            throw new IllegalStateException("해당 날짜의 식단이 존재하지 않습니다.");
+        }
         return result;
     }
 
@@ -71,4 +73,11 @@ public String padZero(String str) {
         }
         return result;
     }
+
+    public boolean checkMenusEmpty(DateMealDto dateMealDto) {
+        return dateMealDto.getBreakfast().isEmpty() &&
+                dateMealDto.getLunch().isEmpty() &&
+                dateMealDto.getDinner().isEmpty() &&
+                dateMealDto.getLunch_corner().isEmpty();
+    }
 }