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app/logic/documents/engine/excel.engine.js

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+/**
+ * Copyright (c) 2026 Niolla
+ * All rights reserved.
+ *
+ * This source code is proprietary and confidential.
+ * Unauthorized copying, modification, distribution, or use
+ * of this file, via any medium, is strictly prohibited.
+ */
+
+// app/logic/documents/engine/excel.engine.js
+
+const ExcelJS = require("exceljs");
+
+const generateExcel = async (builder, data) => {
+  const workbook = new ExcelJS.Workbook();
+  const worksheet = workbook.addWorksheet(builder.sheetName);
+
+  await builder.build(worksheet, data);
+
+  return await workbook.xlsx.writeBuffer();
+};
+
+module.exports = {
+  generateExcel,
+};