Add ASIN support to file organization and metadata

This update enhances audiobook file organization by including the ASIN in folder names and embedding it as a custom metadata tag in audio files (M4B/M4A/MP3). Documentation is updated to reflect the new folder naming convention and metadata tagging. Additionally, local login and registration can now be disabled via an environment variable, and the interactive torrent search modal allows custom search titles for all modes.

documentation/phase3/file-organization.md

@@ -11,11 +11,21 @@ Target directory read from database config `media_dir` (configurable in setup wi
 ```
 [media_dir]/
 └── Author Name/
-    └── Book Title (Year)/
+    └── Book Title (Year) ASIN/
         ├── Book Title.m4b
         └── cover.jpg
 ```
 
+**Folder naming format:**
+- With year and ASIN: `Book Title (Year) ASIN`
+- With ASIN only: `Book Title ASIN`
+- With year only: `Book Title (Year)`
+- Fallback: `Book Title`
+
+**Example:** `Douglas Adams/The Hitchhiker's Guide to the Galaxy (2005) B0009JKV9W/`
+
+**Rationale:** Including ASIN in folder name improves Plex/Audnexus agent matching accuracy.
+
 Default: `/media/audiobooks/` (if not configured)
 
 ## Process
@@ -23,9 +33,9 @@ Default: `/media/audiobooks/` (if not configured)
 1. Download completes in `/downloads/[torrent-name]/` or `/downloads/[filename]` (single file)
 2. Identify audiobook files (.m4b, .m4a, .mp3) - supports both directories and single files
 3. Read media directory from database config `media_dir`
-4. Create `[media_dir]/[Author]/[Title]/`
+4. Create `[media_dir]/[Author]/[Title (Year) ASIN]/`
 5. **Copy** files (not move - originals stay for seeding)
-6. **Tag metadata** (if enabled) - writes correct title, author, narrator to audio files
+6. **Tag metadata** (if enabled) - writes correct title, author, narrator, ASIN to audio files
 7. Copy cover art if found, else download from Audible
 8. Originals remain until seeding requirements met
 
@@ -46,6 +56,18 @@ Default: `/media/audiobooks/` (if not configured)
 - `artist` - Author (fallback)
 - `composer` - Narrator (standard audiobook field)
 - `date` - Year
+- `ASIN` - Audible ASIN (custom tag)
+  - M4B/M4A/MP4: `----:com.apple.iTunes:ASIN`
+  - MP3: Custom ID3v2 tag
+
+**Note:** ASIN is a custom metadata tag and may not appear in standard file properties viewers (Windows/macOS/Linux). Use specialized tools to verify:
+```bash
+# Verify ASIN metadata with ffprobe
+ffprobe -v quiet -print_format json -show_format "audiobook.m4b" | grep -i asin
+
+# Or use exiftool
+exiftool "audiobook.m4b" | grep -i asin
+```
 
 **Configuration:**
 - Key: `metadata_tagging_enabled` (Configuration table)
@@ -65,6 +87,7 @@ Default: `/media/audiobooks/` (if not configured)
 - Ensures Plex can match audiobooks correctly
 - Writes metadata from Audible/Audnexus (known accurate)
 - Prevents "[Various Albums]" and other metadata issues
+- Embeds ASIN directly in audio files for better identification and matching
 
 **Tech Stack:**
 - ffmpeg (system dependency - included in Docker image)
@@ -103,7 +126,7 @@ interface OrganizationResult {
 
 async function organize(
   downloadPath: string,
-  audiobook: {title: string, author: string, year?: number, coverArtUrl?: string}
+  audiobook: {title: string, author: string, year?: number, coverArtUrl?: string, asin?: string}
 ): Promise<OrganizationResult>;
 ```
 

src/app/api/auth/admin/login/route.ts

@@ -15,6 +15,14 @@ import { getEncryptionService } from '@/lib/services/encryption.service';
  */
 export async function POST(request: NextRequest) {
   try {
+    // Check if local login is disabled
+    if (process.env.DISABLE_LOCAL_LOGIN === 'true') {
+      return NextResponse.json(
+        { error: 'Local login is disabled' },
+        { status: 403 }
+      );
+    }
+
     const { username, password } = await request.json();
 
     if (!username || !password) {

src/app/api/auth/local/login/route.ts

@@ -8,6 +8,14 @@ import { LocalAuthProvider } from '@/lib/services/auth/LocalAuthProvider';
 
 export async function POST(request: NextRequest) {
   try {
+    // Check if local login is disabled
+    if (process.env.DISABLE_LOCAL_LOGIN === 'true') {
+      return NextResponse.json(
+        { error: 'Local login is disabled' },
+        { status: 403 }
+      );
+    }
+
     const { username, password } = await request.json();
 
     if (!username || !password) {

src/app/api/auth/providers/route.ts

@@ -12,6 +12,9 @@ export async function GET() {
     const configService = new ConfigurationService();
     const backendMode = await configService.get('system.backend_mode');
 
+    // Check if local login is disabled via environment variable
+    const localLoginDisabled = process.env.DISABLE_LOCAL_LOGIN === 'true';
+
     if (backendMode === 'audiobookshelf') {
       // Audiobookshelf mode - check which auth methods are enabled
       const oidcEnabled = (await configService.get('oidc.enabled')) === 'true';
@@ -25,14 +28,16 @@ export async function GET() {
 
       const providers: string[] = [];
       if (oidcEnabled) providers.push('oidc');
-      if (hasLocalUsers) providers.push('local');
+      // Only add 'local' provider if not disabled and users exist
+      if (hasLocalUsers && !localLoginDisabled) providers.push('local');
 
       return NextResponse.json({
         backendMode: 'audiobookshelf',
         providers,
-        registrationEnabled,
+        registrationEnabled: !localLoginDisabled && registrationEnabled,
         hasLocalUsers,
         oidcProviderName: oidcEnabled ? oidcProviderName : null,
+        localLoginDisabled,
       });
     } else {
       // Plex mode - check if local admin exists (setup admin)
@@ -49,17 +54,20 @@ export async function GET() {
         registrationEnabled: false,
         hasLocalUsers,
         oidcProviderName: null,
+        localLoginDisabled,
       });
     }
   } catch (error) {
     console.error('[Auth] Failed to fetch auth providers:', error);
     // Default to Plex mode if config can't be read
+    const localLoginDisabled = process.env.DISABLE_LOCAL_LOGIN === 'true';
     return NextResponse.json({
       backendMode: 'plex',
       providers: ['plex'],
       registrationEnabled: false,
       hasLocalUsers: false,
       oidcProviderName: null,
+      localLoginDisabled,
     });
   }
 }

src/app/api/auth/register/route.ts

@@ -29,6 +29,14 @@ function checkRateLimit(ip: string): boolean {
 }
 
 export async function POST(request: NextRequest) {
+  // Check if local login is disabled
+  if (process.env.DISABLE_LOCAL_LOGIN === 'true') {
+    return NextResponse.json(
+      { error: 'Local registration is disabled' },
+      { status: 403 }
+    );
+  }
+
   // Rate limiting
   const ip = request.headers.get('x-forwarded-for') || 'unknown';
   if (!checkRateLimit(ip)) {

src/app/api/requests/[id]/interactive-search/route.ts

@@ -12,6 +12,7 @@ import { rankTorrents } from '@/lib/utils/ranking-algorithm';
 /**
  * POST /api/requests/[id]/interactive-search
  * Search for torrents and return results for user selection
+ * Body (optional): { customTitle?: string }
  */
 export async function POST(
   request: NextRequest,
@@ -28,6 +29,15 @@ export async function POST(
 
       const { id } = await params;
 
+      // Parse optional request body
+      let customTitle: string | undefined;
+      try {
+        const body = await req.json();
+        customTitle = body.customTitle;
+      } catch (e) {
+        // No body or invalid JSON - that's okay, customTitle will be undefined
+      }
+
       const requestRecord = await prisma.request.findUnique({
         where: { id },
         include: {
@@ -74,9 +84,13 @@ export async function POST(
 
       // Search Prowlarr for torrents - ONLY enabled indexers
       const prowlarr = await getProwlarrService();
-      const searchQuery = requestRecord.audiobook.title; // Title only - cast wide net
+      // Use custom title if provided, otherwise use audiobook's title
+      const searchQuery = customTitle || requestRecord.audiobook.title;
 
       console.log(`[InteractiveSearch] Searching ${enabledIndexerIds.length} enabled indexers for: ${searchQuery}`);
+      if (customTitle) {
+        console.log(`[InteractiveSearch] Using custom search title (original: "${requestRecord.audiobook.title}")`);
+      }
 
       const results = await prowlarr.search(searchQuery, {
         indexerIds: enabledIndexerIds,
@@ -94,6 +108,7 @@ export async function POST(
       }
 
       // Rank torrents using the ranking algorithm
+      // Always use the audiobook's title/author for ranking (not custom search query)
       const rankedResults = rankTorrents(results, {
         title: requestRecord.audiobook.title,
         author: requestRecord.audiobook.author,
@@ -108,8 +123,9 @@ export async function POST(
       const top3 = filteredResults.slice(0, 3);
       if (top3.length > 0) {
         console.log(`[InteractiveSearch] ==================== RANKING DEBUG ====================`);
-        console.log(`[InteractiveSearch] Requested Title: "${requestRecord.audiobook.title}"`);
-        console.log(`[InteractiveSearch] Requested Author: "${requestRecord.audiobook.author}"`);
+        console.log(`[InteractiveSearch] Search Query: "${searchQuery}"`);
+        console.log(`[InteractiveSearch] Requested Title (for ranking): "${requestRecord.audiobook.title}"`);
+        console.log(`[InteractiveSearch] Requested Author (for ranking): "${requestRecord.audiobook.author}"`);
         console.log(`[InteractiveSearch] Top ${top3.length} results (out of ${filteredResults.length} above threshold):`);
         console.log(`[InteractiveSearch] --------------------------------------------------------`);
         top3.forEach((result, index) => {

src/app/login/page.tsx

@@ -37,6 +37,7 @@ function LoginContent() {
     registrationEnabled: boolean;
     hasLocalUsers: boolean;
     oidcProviderName: string | null;
+    localLoginDisabled: boolean;
   } | null>(null);
   const [showRegisterForm, setShowRegisterForm] = useState(false);
   const [registerUsername, setRegisterUsername] = useState('');
@@ -75,6 +76,7 @@ function LoginContent() {
           registrationEnabled: false,
           hasLocalUsers: false,
           oidcProviderName: null,
+          localLoginDisabled: false,
         });
       }
     };
@@ -727,7 +729,7 @@ function LoginContent() {
                 )}
 
                 {/* Admin Login toggle for Plex mode */}
-                {authProviders.providers.includes('plex') && !authProviders.providers.includes('local') && (
+                {authProviders.providers.includes('plex') && !authProviders.providers.includes('local') && !authProviders.localLoginDisabled && (
                   <>
                     <div className="relative my-6 sm:my-8">
                       <div className="absolute inset-0 flex items-center">

src/components/requests/InteractiveTorrentSearchModal.tsx

@@ -73,8 +73,9 @@ export function InteractiveTorrentSearchModal({
     try {
       let data;
       if (hasRequestId) {
-        // Existing flow: search by requestId (cannot customize search term)
-        data = await searchByRequestId(requestId);
+        // Existing flow: search by requestId with optional custom title
+        const customTitle = searchTitle !== audiobook.title ? searchTitle : undefined;
+        data = await searchByRequestId(requestId, customTitle);
       } else {
         // New flow: search by custom title + original author
         data = await searchByAudiobook(searchTitle, audiobook.author);
@@ -140,42 +141,31 @@ export function InteractiveTorrentSearchModal({
     <>
       <Modal isOpen={isOpen} onClose={onClose} title="Select Torrent" size="full">
         <div className="space-y-4">
-          {/* Search customization */}
+          {/* Search customization - editable for ALL modes */}
           <div className="bg-gray-50 dark:bg-gray-900 p-4 rounded-lg">
-            {hasRequestId ? (
-              // Existing request: show static title (cannot customize)
-              <>
-                <h3 className="font-semibold text-gray-900 dark:text-gray-100">{audiobook.title}</h3>
-                <p className="text-sm text-gray-600 dark:text-gray-400">By {audiobook.author}</p>
-              </>
-            ) : (
-              // New search: allow title customization
-              <>
-                <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
-                  Search Title
-                </label>
-                <div className="flex gap-2">
-                  <input
-                    type="text"
-                    value={searchTitle}
-                    onChange={(e) => setSearchTitle(e.target.value)}
-                    onKeyPress={handleSearchKeyPress}
-                    placeholder="Enter book title to search..."
-                    disabled={isSearching}
-                    className="flex-1 px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500 bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 disabled:opacity-50"
-                  />
-                  <Button
-                    onClick={performSearch}
-                    disabled={isSearching || !searchTitle.trim()}
-                    variant="primary"
-                    size="sm"
-                  >
-                    Search
-                  </Button>
-                </div>
-                <p className="text-sm text-gray-600 dark:text-gray-400 mt-2">By {audiobook.author}</p>
-              </>
-            )}
+            <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
+              Search Title
+            </label>
+            <div className="flex gap-2">
+              <input
+                type="text"
+                value={searchTitle}
+                onChange={(e) => setSearchTitle(e.target.value)}
+                onKeyPress={handleSearchKeyPress}
+                placeholder="Enter book title to search..."
+                disabled={isSearching}
+                className="flex-1 px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500 bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 disabled:opacity-50"
+              />
+              <Button
+                onClick={performSearch}
+                disabled={isSearching || !searchTitle.trim()}
+                variant="primary"
+                size="sm"
+              >
+                Search
+              </Button>
+            </div>
+            <p className="text-sm text-gray-600 dark:text-gray-400 mt-2">By {audiobook.author}</p>
           </div>
 
           {/* Error message */}

src/lib/hooks/useRequests.ts

@@ -216,7 +216,7 @@ export function useInteractiveSearch() {
   const [isLoading, setIsLoading] = useState(false);
   const [error, setError] = useState<string | null>(null);
 
-  const searchTorrents = async (requestId: string) => {
+  const searchTorrents = async (requestId: string, customTitle?: string) => {
     if (!accessToken) {
       throw new Error('Not authenticated');
     }
@@ -227,6 +227,10 @@ export function useInteractiveSearch() {
     try {
       const response = await fetchWithAuth(`/api/requests/${requestId}/interactive-search`, {
         method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: customTitle ? JSON.stringify({ customTitle }) : undefined,
       });
 
       const data = await response.json();

src/lib/processors/organize-files.processor.ts

@@ -54,6 +54,7 @@ export async function processOrganizeFiles(payload: OrganizeFilesPayload): Promi
         author: audiobook.author,
         narrator: audiobook.narrator || undefined,
         coverArtUrl: audiobook.coverArtUrl || undefined,
+        asin: audiobook.audibleAsin || undefined,
       },
       jobId ? { jobId, context: 'FileOrganizer' } : undefined
     );

src/lib/utils/file-organizer.ts

@@ -16,6 +16,7 @@ export interface AudiobookMetadata {
   narrator?: string;
   year?: number;
   coverArtUrl?: string;
+  asin?: string;
 }
 
 export interface OrganizationResult {
@@ -110,6 +111,7 @@ export class FileOrganizer {
               author: audiobook.author,
               narrator: audiobook.narrator,
               year: audiobook.year,
+              asin: audiobook.asin,
             });
 
             const successCount = taggingResults.filter((r) => r.success).length;
@@ -153,7 +155,8 @@ export class FileOrganizer {
         this.mediaDir,
         audiobook.author,
         audiobook.title,
-        audiobook.year
+        audiobook.year,
+        audiobook.asin
       );
 
       await logger?.info(`Target path: ${targetPath}`);
@@ -359,16 +362,28 @@ export class FileOrganizer {
 
   /**
    * Build target path with sanitized names
+   * Format: Author/Title (Year) ASIN or Author/Title ASIN or Author/Title (Year)
    */
   private buildTargetPath(
     baseDir: string,
     author: string,
     title: string,
-    year?: number
+    year?: number,
+    asin?: string
   ): string {
     const authorClean = this.sanitizePath(author);
     const titleClean = this.sanitizePath(title);
-    const folderName = year ? `${titleClean} (${year})` : titleClean;
+
+    // Build folder name with optional year and ASIN
+    let folderName = titleClean;
+
+    if (year) {
+      folderName = `${folderName} (${year})`;
+    }
+
+    if (asin) {
+      folderName = `${folderName} ${asin}`;
+    }
 
     return path.join(baseDir, authorClean, folderName);
   }

src/lib/utils/metadata-tagger.ts

@@ -15,6 +15,7 @@ export interface MetadataTaggingOptions {
   author: string;
   narrator?: string;
   year?: number;
+  asin?: string;
 }
 
 export interface TaggingResult {
@@ -76,6 +77,11 @@ export async function tagAudioFileMetadata(
         args.push('-metadata', `date="${metadata.year}"`);
       }
 
+      if (metadata.asin) {
+        // Use custom iTunes tag format for M4B/M4A/MP4 files
+        args.push('-metadata', `----:com.apple.iTunes:ASIN="${escapeMetadata(metadata.asin)}"`);
+      }
+
       // Explicitly specify output format (fixes .tmp extension issue)
       args.push('-f', 'mp4');
     }
@@ -97,6 +103,11 @@ export async function tagAudioFileMetadata(
         args.push('-metadata', `date="${metadata.year}"`);
       }
 
+      if (metadata.asin) {
+        // Use TXXX frame for custom ID3v2 tags in MP3 files
+        args.push('-metadata', `ASIN="${escapeMetadata(metadata.asin)}"`);
+      }
+
       // Explicitly specify output format (fixes .tmp extension issue)
       args.push('-f', 'mp3');
     }