implement order number adjustment using 27470 in email and PDF generation

.env.example

@@ -11,3 +11,6 @@ SMTP_SECURE=false
 SMTP_USER=your_email@gmail.com
 SMTP_PASS=your_email_password_or_app_password
 SMTP_FROM_EMAIL=your_email@gmail.com
+
+# Order number offset (Next Shopify order is 1018. To make it start from 28470, offset is 28470 - 1018 = 27452)
+ORDER_NUMBER_OFFSET=27470

mailer.js

@@ -2,6 +2,19 @@ const nodemailer = require('nodemailer');
 const fs = require('fs');
 const path = require('path');
 
+/**
+ * Helper to adjust order number using ORDER_NUMBER_OFFSET
+ */
+const getAdjustedOrderNumber = (orderNumberOrName) => {
+    if (!orderNumberOrName) return '';
+    const offset = parseInt(27470, 10) || 0;
+    const str = orderNumberOrName.toString();
+    const matches = str.match(/\d+/);
+    if (!matches) return str;
+    const num = parseInt(matches[0], 10);
+    return (num + offset).toString();
+};
+
 /**
  * Sends a premium custom email with the PDF attachment.
  * @param {string} toEmail - The recipient's email address
@@ -22,7 +35,7 @@ const sendEmailWithAttachment = async (toEmail, orderData, pdfBuffer) => {
         }
     });
 
-    const orderNumber = orderData.order_number || orderData.name;
+    const orderNumber = getAdjustedOrderNumber(orderData.order_number || orderData.name);
     const currencySymbol = orderData.currency === 'INR' ? 'Rs. ' : `${orderData.currency} `;
 
     // Check if local logo exists for CID inline attachment

pdfGenerator.js

@@ -37,6 +37,19 @@ async function fetchImageBuffer(url) {
     }
 }
 
+/**
+ * Helper to adjust order number using ORDER_NUMBER_OFFSET
+ */
+const getAdjustedOrderNumber = (orderNumberOrName) => {
+    if (!orderNumberOrName) return '';
+    const offset = parseInt(27470, 10) || 0;
+    const str = orderNumberOrName.toString();
+    const matches = str.match(/\d+/);
+    if (!matches) return str;
+    const num = parseInt(matches[0], 10);
+    return (num + offset).toString();
+};
+
 /**
  * Generates a PDF invoice matching the user's custom layout.
  * @param {Object} orderData - The Shopify order payload
@@ -177,7 +190,7 @@ const generateInvoicePDF = async (orderData) => {
             doc.fontSize(14)
                .font('Helvetica-Bold')
                .fillColor(primaryColor)
-               .text(`Order no:  ${orderData.order_number}`, 380, detailsY)
+               .text(`Order no:  ${getAdjustedOrderNumber(orderData.order_number)}`, 380, detailsY)
                .fontSize(10)
                .font('Helvetica-Bold')
                .text('Order date: ', 380, detailsY + 22, { continued: true })