Migrate to new library item in scanner

server/models/Author.js

@@ -107,6 +107,22 @@ class Author extends Model {
     return libraryItems
   }
 
+  /**
+   *
+   * @param {string} name
+   * @param {string} libraryId
+   * @returns {Promise<Author>}
+   */
+  static async findOrCreateByNameAndLibrary(name, libraryId) {
+    const author = await this.getByNameAndLibrary(name, libraryId)
+    if (author) return author
+    return this.create({
+      name,
+      lastFirst: this.getLastFirst(name),
+      libraryId
+    })
+  }
+
   /**
    * Initialize model
    * @param {import('../Database').sequelize} sequelize