대표 이미지 원본 선택 보강 v1.7.9

server/utils/admin-post-input.js

@@ -1,6 +1,7 @@
 import { z } from 'zod'
 import { ADMIN_POST_PLACEHOLDER_TITLE } from '../../lib/admin-post-title.js'
 import { normalizeMarkdownContent } from '../../lib/markdown-content-normalizer.js'
+import { isPostCardThumbnailUrl } from '../../lib/post-card-thumbnail-url.js'
 import { postStatusSchema } from './content-schema.js'
 
 export const adminPostInputSchema = z.object({
@@ -11,7 +12,11 @@ export const adminPostInputSchema = z.object({
   slug: z.string().trim().min(1).regex(/^[a-z0-9가-힣]+(?:-[a-z0-9가-힣]+)*$/),
   content: z.preprocess(normalizeMarkdownContent, z.string()).default(''),
   excerpt: z.string().default(''),
-  featuredImage: z.string().trim().nullable().default(null),
+  featuredImage: z.string()
+    .trim()
+    .nullable()
+    .default(null)
+    .refine((value) => !isPostCardThumbnailUrl(value), '카드 썸네일은 대표 이미지로 사용할 수 없습니다.'),
   showFeaturedImage: z.boolean().default(false),
   isFeatured: z.boolean().default(false),
   seoTitle: z.string().trim().default(''),

server/utils/post-thumbnail-image.js

@@ -2,13 +2,15 @@ import { existsSync } from 'node:fs'
 import { mkdir, stat } from 'node:fs/promises'
 import { dirname, extname, join, posix } from 'node:path'
 import sharp from 'sharp'
+import { isPostCardThumbnailUrl } from '../../lib/post-card-thumbnail-url.js'
+
+export { isPostCardThumbnailUrl }
 
 export const POST_THUMBNAIL_WIDTH = 640
 export const POST_THUMBNAIL_HEIGHT = 360
 export const POST_THUMBNAIL_QUALITY = 82
 
 const postUploadUrlPattern = /^\/uploads\/posts\/\d{4}\/\d{2}\/[^/?#]+$/i
-const postThumbnailUrlPattern = /^\/uploads\/posts\/\d{4}\/\d{2}\/thumbs\/[^/?#]+-card\.webp$/i
 const postThumbnailDirectoryName = 'thumbs'
 const postThumbnailSuffix = '-card'
 const postThumbnailExtension = '.webp'
@@ -75,13 +77,6 @@ export const getPostThumbnailUrl = (imageUrl) => {
   return `${directory}/${postThumbnailDirectoryName}/${getPostThumbnailFileName(fileName)}`
 }
 
-/**
- * 게시물 카드 썸네일 URL인지 확인한다.
- * @param {string|null|undefined} imageUrl - 검사할 이미지 URL
- * @returns {boolean} 카드 썸네일 여부
- */
-export const isPostCardThumbnailUrl = (imageUrl) => Boolean(imageUrl && postThumbnailUrlPattern.test(imageUrl))
-
 /**
  * 게시물 카드 썸네일 URL의 디스크 경로를 조회한다.
  * @param {string} imageUrl - 원본 이미지 URL