릴리스: v0.1.52 프리뷰 전용화와 썸네일 자동 생성

backend/src/db.js

@@ -920,6 +920,20 @@ function uniqueTierListItems(poolItems) {
   return Array.from(map.values())
 }
 
+function getAutoThumbnailSrc(groups = [], pool = []) {
+  const itemMap = new Map((pool || []).filter((item) => item?.id && item?.src).map((item) => [item.id, item]))
+
+  for (const group of groups || []) {
+    for (const itemId of group?.itemIds || []) {
+      const item = itemMap.get(itemId)
+      if (item?.src) return item.src
+    }
+  }
+
+  const fallbackItem = (pool || []).find((item) => item?.src)
+  return fallbackItem?.src || ''
+}
+
 async function listAdminTierLists({ queryText = '', page = 1, limit = 50, currentUserId = '' } = {}) {
   const normalizedLimit = Math.min(Math.max(Number(limit) || 50, 1), 200)
   const normalizedPage = Math.max(Number(page) || 1, 1)
@@ -1203,6 +1217,7 @@ async function deleteCustomItems(ids) {
 async function saveTierList({ id, authorId, gameId, title, thumbnailSrc = '', description, isPublic, groups, pool }) {
   const existing = id ? await findTierListById(id, authorId) : null
   await syncOwnedCustomItemLabels({ ownerId: authorId, items: pool })
+  const nextThumbnailSrc = (thumbnailSrc || '').trim() || getAutoThumbnailSrc(groups, pool)
 
   if (existing) {
     await query(
@@ -1211,7 +1226,7 @@ async function saveTierList({ id, authorId, gameId, title, thumbnailSrc = '', de
         SET title = ?, thumbnail_src = ?, description = ?, is_public = ?, groups_json = ?, pool_json = ?, updated_at = ?
         WHERE id = ?
       `,
-      [title, thumbnailSrc, description || '', isPublic ? 1 : 0, serializeJson(groups), serializeJson(pool), now(), existing.id]
+      [title, nextThumbnailSrc, description || '', isPublic ? 1 : 0, serializeJson(groups), serializeJson(pool), now(), existing.id]
     )
     return findTierListById(existing.id, authorId)
   }
@@ -1224,7 +1239,7 @@ async function saveTierList({ id, authorId, gameId, title, thumbnailSrc = '', de
       )
       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
     `,
-    [id, authorId, gameId, title, thumbnailSrc, description || '', isPublic ? 1 : 0, serializeJson(groups), serializeJson(pool), createdAt, createdAt]
+    [id, authorId, gameId, title, nextThumbnailSrc, description || '', isPublic ? 1 : 0, serializeJson(groups), serializeJson(pool), createdAt, createdAt]
   )
   return findTierListById(id, authorId)
 }