Add logging when author normalization is empty

server/models/Book.js

@@ -480,7 +480,10 @@ class Book extends Model {
     const authorsAdded = []
     for (const authorName of newAuthorNames) {
       const { author, created } = await authorModel.findOrCreateByNameAndLibrary(authorName, libraryId)
-      if (!author) continue
+      if (!author) {
+        Logger.warn(`[Book] "${this.title}" skipped author "${authorName}" because normalized name was empty`)
+        continue
+      }
       await bookAuthorModel.create({ bookId: this.id, authorId: author.id })
       if (created) {
         SocketAuthority.emitter('author_added', author.toOldJSON())

server/scanner/BookScanner.js

@@ -223,6 +223,10 @@ class BookScanner {
         for (const authorName of bookMetadata.authors) {
           if (!media.authors.some((au) => Database.authorModel.isAuthorNameMatch(au.name, authorName))) {
             const { author, created } = await Database.authorModel.findOrCreateByNameAndLibrary(authorName, libraryItemData.libraryId)
+            if (!author) {
+              libraryScan.addLog(LogLevel.WARN, `Skipping author "${authorName}" because normalized name was empty`)
+              continue
+            }
             if (!created) {
               await Database.bookAuthorModel.create({
                 bookId: media.id,

server/scanner/Scanner.js

@@ -250,7 +250,10 @@ class Scanner {
         const existingAuthor = libraryItem.media.authors.find((a) => Database.authorModel.isAuthorNameMatch(a.name, authorName))
         if (!existingAuthor) {
           const { author, created: isCreated } = await Database.authorModel.findOrCreateByNameAndLibrary(authorName, libraryItem.libraryId)
-          if (!author) continue
+          if (!author) {
+            libraryScan.addLog(LogLevel.WARN, `Skipping author "${authorName}" because normalized name was empty`)
+            continue
+          }
           if (isCreated) {
             SocketAuthority.emitter('author_added', author.toOldJSON())
             // Update filter data