feat(dm): standard forecast added in rest of migration to come

backend/utils/excelTemplates.utils.ts

@@ -0,0 +1,49 @@
+import * as XLSX from "xlsx";
+
+export type Template = {
+	name: string;
+	headers: string[];
+};
+
+export const excelTemplate = async (data: Template) => {
+	/**
+	 * Creates the standard Template for bulk orders in
+	 */
+
+	// const headers = [
+	//     [
+	//         "CustomerArticleNumber",
+	//         "CustomerOrderNumber",
+	//         "CustomerLineNumber",
+	//         "CustomerRealeaseNumber",
+	//         "Quantity",
+	//         "DeliveryDate",
+	//         "CustomerID",
+	//         "Remark",
+	//         // "InvoiceID",
+	//     ],
+	// ];
+
+	// create a new workbook
+	const wb = XLSX.utils.book_new();
+	const ws = XLSX.utils.aoa_to_sheet([data.headers]);
+	//const ws2 = XLSX.utils.aoa_to_sheet(headers2);
+
+	const columnWidths = data.headers.map((header) => ({
+		width: header.length + 2,
+	}));
+
+	ws["!cols"] = columnWidths;
+
+	// append the worksheet to the workbook
+	XLSX.utils.book_append_sheet(wb, ws, `Sheet1`);
+	//XLSX.utils.book_append_sheet(wb, ws2, `Sheet2`);
+
+	// Creates the file to disk'
+	// XLSX.writeFile(wb, data.name);
+
+	// Write the workbook to a buffer and return it
+	const excelBuffer = XLSX.write(wb, { bookType: "xlsx", type: "buffer" });
+
+	return excelBuffer;
+};