From 3b7cf1718284ed865d05daea620735c932831a71 Mon Sep 17 00:00:00 2001
From: mikiher <mikiher@gmail.com>
Date: Mon, 3 Aug 2026 09:35:01 +0300
Subject: [PATCH] Add  task for batch library item rescans

---
 client/strings/en-us.json                   |  1 +
 server/controllers/LibraryItemController.js | 62 ++++++++++++++++++---
 2 files changed, 55 insertions(+), 8 deletions(-)

diff --git a/client/strings/en-us.json b/client/strings/en-us.json
index d9d6325e4..1c9197860 100644
--- a/client/strings/en-us.json
+++ b/client/strings/en-us.json
@@ -937,6 +937,7 @@
   "MessageTaskScanNoChangesNeeded": "No changes needed",
   "MessageTaskScanningFileChanges": "Scanning file changes in \"{0}\"",
   "MessageTaskScanningLibrary": "Scanning \"{0}\" library",
+  "MessageTaskBatchScanningLibraryItems": "Re-scanning {0} library items",
   "MessageTaskTargetDirectoryNotWritable": "Target directory is not writable",
   "MessageThinking": "Thinking...",
   "MessageUploaderItemFailed": "Failed to upload",
diff --git a/server/controllers/LibraryItemController.js b/server/controllers/LibraryItemController.js
index 07b4ee67f..9a0eee3df 100644
--- a/server/controllers/LibraryItemController.js
+++ b/server/controllers/LibraryItemController.js
@@ -19,6 +19,7 @@ const RssFeedManager = require('../managers/RssFeedManager')
 const CacheManager = require('../managers/CacheManager')
 const CoverManager = require('../managers/CoverManager')
 const ShareManager = require('../managers/ShareManager')
+const TaskManager = require('../managers/TaskManager')
 
 /**
  * @typedef RequestUserObject
@@ -833,18 +834,63 @@ class LibraryItemController {
       return res.sendStatus(400)
     }
 
+    const libraryId = libraryItems[0].libraryId
+    const library = await Database.libraryModel.findByPk(libraryId, { attributes: ['id', 'name'] })
+
     res.sendStatus(200)
 
-    const libraryId = libraryItems[0].libraryId
-    for (const libraryItem of libraryItems) {
-      if (libraryItem.isFile) {
-        Logger.warn(`[LibraryItemController] Re-scanning file library items not yet supported`)
-      } else {
-        await LibraryItemScanner.scanLibraryItem(libraryItem.id)
-      }
+    const itemCount = libraryItems.length
+    const taskData = {
+      libraryId,
+      libraryName: library?.name || '',
+      itemCount
+    }
+    const taskTitleString = {
+      text: `Re-scanning ${itemCount} library items`,
+      key: 'MessageTaskBatchScanningLibraryItems',
+      subs: [String(itemCount)]
+    }
+    const task = TaskManager.createAndAddTask('batch-item-scan', taskTitleString, null, true, taskData)
+    const startedAt = Date.now()
+    const scanResults = {
+      updated: 0,
+      missing: 0,
+      added: 0
     }
 
-    await Database.resetLibraryIssuesFilterData(libraryId)
+    try {
+      for (const libraryItem of libraryItems) {
+        if (libraryItem.isFile) {
+          Logger.warn(`[LibraryItemController] Re-scanning file library items not yet supported`)
+          continue
+        }
+        const result = await LibraryItemScanner.scanLibraryItem(libraryItem.id)
+        if (result === ScanResult.UPDATED) {
+          scanResults.updated++
+        } else if (result === ScanResult.REMOVED) {
+          scanResults.missing++
+        } else if (result === ScanResult.ADDED) {
+          scanResults.added++
+        }
+      }
+
+      await Database.resetLibraryIssuesFilterData(libraryId)
+
+      task.data.scanResults = {
+        ...scanResults,
+        elapsed: Date.now() - startedAt
+      }
+      task.setFinished(null, true)
+    } catch (error) {
+      Logger.error(`[LibraryItemController] Batch scan failed`, error)
+      const taskFailedString = {
+        text: 'Failed',
+        key: 'MessageTaskFailed'
+      }
+      task.setFailed(taskFailedString)
+    }
+
+    TaskManager.taskFinished(task)
   }
 
   /**