미사용 이미지 자산 정리 배치 추가

backend/src/db.js

@@ -28,6 +28,14 @@ function serializeJson(value) {
   return JSON.stringify(value || [])
 }
 
+function collectUploadSrcsFromItems(items, bucket) {
+  for (const item of items || []) {
+    if (typeof item?.src === 'string' && item.src.startsWith('/uploads/')) {
+      bucket.add(item.src)
+    }
+  }
+}
+
 function mapUserRow(row) {
   if (!row) return null
   return {
@@ -644,6 +652,59 @@ async function listRecentImageOptimizationJobs(limit = 20) {
   )
   return rows.map(mapImageOptimizationJobRow)
 }
+
+async function listUnusedImageAssets({ limit = 100, minAgeHours = 24 } = {}) {
+  const safeLimit = Math.max(1, Math.min(500, Number(limit) || 100))
+  const safeMinAgeHours = Math.max(0, Number(minAgeHours) || 24)
+  const cutoff = now() - safeMinAgeHours * 60 * 60 * 1000
+
+  const assets = (await query(
+    `SELECT id, content_hash, src, mime_type, byte_size, original_byte_size, width, height, created_at FROM image_assets WHERE created_at <= ? ORDER BY created_at ASC LIMIT ${safeLimit}`,
+    [cutoff]
+  )).map(mapImageAssetRow)
+
+  if (!assets.length) return []
+
+  const referencedSrcs = new Set()
+
+  const [userRows, gameRows, gameItemRows, customItemRows, tierListRows, templateRequestRows] = await Promise.all([
+    query("SELECT avatar_src FROM users WHERE avatar_src <> ''"),
+    query("SELECT thumbnail_src FROM games WHERE thumbnail_src <> ''"),
+    query("SELECT src FROM game_items WHERE src <> ''"),
+    query("SELECT src FROM custom_items WHERE src <> ''"),
+    query("SELECT thumbnail_src, pool_json FROM tierlists"),
+    query("SELECT thumbnail_src_snapshot, items_json FROM template_requests"),
+  ])
+
+  for (const row of userRows) if (row.avatar_src) referencedSrcs.add(row.avatar_src)
+  for (const row of gameRows) if (row.thumbnail_src) referencedSrcs.add(row.thumbnail_src)
+  for (const row of gameItemRows) if (row.src) referencedSrcs.add(row.src)
+  for (const row of customItemRows) if (row.src) referencedSrcs.add(row.src)
+
+  for (const row of tierListRows) {
+    if (row.thumbnail_src) referencedSrcs.add(row.thumbnail_src)
+    collectUploadSrcsFromItems(parseJson(row.pool_json, []), referencedSrcs)
+  }
+
+  for (const row of templateRequestRows) {
+    if (row.thumbnail_src_snapshot) referencedSrcs.add(row.thumbnail_src_snapshot)
+    collectUploadSrcsFromItems(parseJson(row.items_json, []), referencedSrcs)
+  }
+
+  return assets.filter((asset) => !referencedSrcs.has(asset.src))
+}
+
+async function deleteImageAssets(ids) {
+  const uniqueIds = Array.from(new Set((ids || []).filter(Boolean)))
+  if (!uniqueIds.length) return []
+  const placeholders = uniqueIds.map(() => '?').join(', ')
+  const rows = await query(
+    `SELECT id, content_hash, src, mime_type, byte_size, original_byte_size, width, height, created_at FROM image_assets WHERE id IN (${placeholders})`,
+    uniqueIds
+  )
+  await query(`DELETE FROM image_assets WHERE id IN (${placeholders})`, uniqueIds)
+  return rows.map(mapImageAssetRow)
+}
 async function createGameItem({ id, gameId, src, label }) {
   const createdAt = now()
   await query('INSERT INTO game_items (id, game_id, src, label, created_at) VALUES (?, ?, ?, ?, ?)', [
@@ -1532,6 +1593,8 @@ module.exports = {
   findImageOptimizationJobById,
   updateImageOptimizationJobStatus,
   listRecentImageOptimizationJobs,
+  listUnusedImageAssets,
+  deleteImageAssets,
   createGameItem,
   updateGameItemLabel,
   deleteGameItem,