refactor [#109] 공연, 아티스트, 유저 존재 여부 조회 로직 분리

src/main/java/org/sopt/confeti/api/user/facade/UserFavoriteFacade.java

@@ -1,5 +1,6 @@
 package org.sopt.confeti.api.user.facade;
 
+import java.time.LocalDate;
 import lombok.RequiredArgsConstructor;
 import org.sopt.confeti.annotation.Facade;
 import org.sopt.confeti.api.user.facade.dto.response.UserFavoriteArtistDTO;
@@ -46,11 +47,20 @@ public void addFestivalFavorite(long userId, long festivalId) {
     public void removeFestivalFavorite(long userId, long festivalId) {
         User user = userService.findById(userId);
         Festival festival = festivalService.findById(festivalId);
+        validateExistUser(userId);
+        validateExistFestival(festivalId);
         validateExistFestivalFavorite(userId, festivalId);
 
         festivalFavoriteService.delete(user, festival);
     }
 
+    @Transactional(readOnly = true)
+    protected void validateExistFestival(final long festivalId) {
+        if (!festivalService.existsById(festivalId)) {
+            throw new NotFoundException(ErrorMessage.NOT_FOUND);
+        }
+    }
+
     @Transactional(readOnly = true)
     protected void validateExistFestivalFavorite(final long userId, final long festivalId) {
         if (!festivalFavoriteService.isFavorite(userId, festivalId)) {
@@ -142,11 +152,4 @@ protected void validateExistConcert(final long concertId) {
             throw new NotFoundException(ErrorMessage.NOT_FOUND);
         }
     }
-
-    @Transactional(readOnly = true)
-    protected void validateExistFestival(final long festivalId) {
-        if (!festivalService.existsById(festivalId)) {
-            throw new NotFoundException(ErrorMessage.NOT_FOUND);
-        }
-    }
 }