🐛 Fix: 편지지 아이템 구매/착용 URL 경로 수정 및 letter_paper path 예외처리 추가

src/main/java/com/example/egobook_be/domain/shop/service/AdminShopService.java

@@ -40,6 +40,8 @@ public AdminItemResDto createItem(AdminItemReqDto reqDto) throws IOException {
         path = path.equals("decor_two") ? "decor2" : path;
         path = path.equals("decor_one") ? "decor1" : path;
 
+        path = path.equals("letter_paper") ? "letter" : path;
+
         // 이미지 s3에 업로드
         String imageUrl = s3ImageService.upload(reqDto.file(),path);
 

src/main/java/com/example/egobook_be/domain/shop/service/ShopService.java

@@ -93,7 +93,7 @@ public SliceResponse<ShopItemInfoResDto> getItemSlice(Long userId, ItemCategory
          */
         return SliceResponse.of(sliceEntity, item -> {
             Boolean isPurchased = userItemMap.containsKey(item.getId());
-            return itemMapper.toShopItemInfoResDto(item, getShopCloudFrontDomain(), getMyCloudFrontDomain(), isPurchased, userItemMap.getOrDefault(item.getId(), false));
+            return itemMapper.toShopItemInfoResDto(item, getCloudFrontDomainByCategory(item.getCategory()), getMyCloudFrontDomain(), isPurchased, userItemMap.getOrDefault(item.getId(), false));
         });
     }
 
@@ -131,7 +131,7 @@ public ItemInfoResDto purchaseItem(Long userId, PurchaseItemReqDto reqDto){
 
         log.info("[ShopService] purchaseItem End - userId: {}", userId);
         // 4. 아이템 구매 후, 해당 아이템에 대한 정보를 반환한다.
-        return userItemMapper.toItemInfoResDto(userItem, item, getShopCloudFrontDomain());
+        return userItemMapper.toItemInfoResDto(userItem, item, getCloudFrontDomainByCategory(item.getCategory()));
     }
 
     /**
@@ -157,7 +157,8 @@ public ItemInfoResDto equipItem(Long userId, EquipItemReqDto reqDto) {
 
         // 2. 멱등성 체크: 이미 원하는 상태라면 DB 변경 없이 바로 반환 (불필요한 쿼리 방지)
         if (targetUserItem.getIsEquipped() == targetStatus) {
-            return userItemMapper.toItemInfoResDto(targetUserItem, targetUserItem.getItem(), cloudfrontDomain);
+            return userItemMapper.toItemInfoResDto(targetUserItem, targetUserItem.getItem(),
+                    getCloudFrontDomainByCategory(targetUserItem.getItem().getCategory()));
         }
 
         /*
@@ -187,7 +188,8 @@ public ItemInfoResDto equipItem(Long userId, EquipItemReqDto reqDto) {
 
         log.info("[ShopService] equipItem End - userId: {}", userId);
         // 4. 변경된 정보 반환
-        return userItemMapper.toItemInfoResDto(targetUserItem, targetUserItem.getItem(), getMyCloudFrontDomain());
+        return userItemMapper.toItemInfoResDto(targetUserItem, targetUserItem.getItem(),
+                getCloudFrontDomainByCategory(targetUserItem.getItem().getCategory()));
     }
 
     /**
@@ -202,7 +204,8 @@ public List<ItemInfoResDto> getEquippedItems(Long userId){
         log.info("[ShopService] getEquippedItems End - userId: {}", userId);
         // 2. 조회해온 각 아이템을 dto로 변환 (Fetch Join 썼으므로 N+1 발생 안함)
         return equippedItems.stream()
-                .map(userItem -> userItemMapper.toItemInfoResDto(userItem, userItem.getItem(), getMyCloudFrontDomain()))
+                .map(userItem -> userItemMapper.toItemInfoResDto(userItem, userItem.getItem(),
+                        getCloudFrontDomainByCategory(userItem.getItem().getCategory())))
                 .toList();
     }
 
@@ -212,4 +215,11 @@ private String getShopCloudFrontDomain(){
     private String getMyCloudFrontDomain(){
         return cloudfrontDomain+"/my";
     }
-}
+
+    private String getCloudFrontDomainByCategory(ItemCategory category) {
+        return switch (category) {
+            case LETTER_PAPER -> cloudfrontDomain + "/letter";
+            default -> cloudfrontDomain + "/shop";
+        };
+    }
+}

src/main/java/com/example/egobook_be/global/loader/ItemInitializer.java

@@ -35,6 +35,7 @@ public class ItemInitializer implements ApplicationRunner {
     String PATH_DECOR_TWO = "decor2";
     String PATH_BACKGROUND = "background";
 
+    String PATH_LETTER_PAPER = "letter";
 
     @Override
     @Transactional
@@ -170,9 +171,22 @@ private List<Item> getInitItemList(){
         items.add(buildBackgroundItem("Blossom.png", 750));
         items.add(buildBackgroundItem("Beach.png", 1000));
 
+
+
+        items.add(buildLetterPaperItem("Blue.png", 150));
+        items.add(buildLetterPaperItem("Green.png", 100));
+        items.add(buildLetterPaperItem("Pink.png", 75));
+        items.add(buildLetterPaperItem("Purple.png", 175));
+
+
         return items;
     }
 
+
+    private Item buildLetterPaperItem(String name, Integer price) {
+        return buildItem(PATH_LETTER_PAPER, ItemCategory.LETTER_PAPER, name, price);
+    }
+
     /**
      * 1. Back 아이템 생성 함수
      */