[REFACTOR] 썸네일 파일 이름 반환, close #115

src/main/java/com/gongspot/project/domain/banner/converter/BannerConverter.java

@@ -32,9 +32,14 @@ public static BannerResponseDTO.GetBannerListDTO toBannerListDTO(List<BannerResp
 
     public static BannerResponseDTO.GetBannerDetailDTO toBannerDetailDTO(Banner banner, Optional<Media> thumbnailMediaOptional, List<Media> attachments) {
 
-        String thumbnailUrl = null;
+        BannerResponseDTO.thumbnailDTO thumbnail = null;
         if (thumbnailMediaOptional.isPresent()) {
-            thumbnailUrl = thumbnailMediaOptional.get().getUrl();
+            Media thumbnailMedia = thumbnailMediaOptional.get();
+            thumbnail = BannerResponseDTO.thumbnailDTO.builder()
+                    .thumbnailId(thumbnailMedia.getId())
+                    .url(thumbnailMedia.getUrl())
+                    .fileName(thumbnailMedia.getOriginalFileName())
+                    .build();
         }
 
         List<BannerResponseDTO.AttachmentDTO> attachmentDTOs = attachments.stream()
@@ -51,7 +56,7 @@ public static BannerResponseDTO.GetBannerDetailDTO toBannerDetailDTO(Banner bann
                 banner.getTitle(),
                 banner.getContent(),
                 banner.getCreatedAt().format(DateTimeFormatter.ofPattern("yyyy.MM.dd")),
-                thumbnailUrl,
+                thumbnail,
                 attachmentDTOs
         );
     }

src/main/java/com/gongspot/project/domain/banner/dto/BannerResponseDTO.java

@@ -1,5 +1,6 @@
 package com.gongspot.project.domain.banner.dto;
 
+import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Getter;
@@ -31,7 +32,7 @@ public static class GetBannerDetailDTO {
         String title;
         String content;
         String datetime;
-        String thumbnailUrl;
+        thumbnailDTO thumbnail;
         List<AttachmentDTO> attachments;
     }
 
@@ -44,4 +45,14 @@ public static class AttachmentDTO {
         private String url;
         private String fileName;
     }
+
+    @Getter
+    @NoArgsConstructor
+    @AllArgsConstructor
+    @Builder
+    public static class thumbnailDTO {
+        private Long thumbnailId;
+        private String url;
+        private String fileName;
+    }
 }