welcome mails: barcode_content to barcode_url generation with bwip-js

package.json

@@ -13,6 +13,7 @@
 		"@hono/zod-openapi": "0.18.0",
 		"@hono/zod-validator": "0.4.1",
 		"bullmq": "5.29.0",
+		"bwip-js": "^4.5.1",
 		"handlebars": "4.7.8",
 		"hono": "4.6.11",
 		"ioredis": "5.4.1",

src/routes/email.ts

@@ -4,6 +4,7 @@ import { z } from 'zod'
 import { EmailService } from '../services/email'
 import { getEmailTemplate } from '../templates'
 import { Language } from '../types'
+import { toBuffer } from 'bwip-js/node'
 
 const emailRouter = new Hono()
 const emailService = new EmailService()
@@ -16,15 +17,30 @@ const sendEmailSchema = z.object({
   data: z.record(z.any())
 })
 
+async function generateBarcodeDataURL(data) {
+  const buffer = await toBuffer({
+    bcid: 'code128',
+    text: data,
+    scale: 3,
+    height: 10,
+    includetext: true,
+    textxalign: 'center',
+  });
+
+  const base64Data = buffer.toString('base64');
+  const dataURL = `data:image/png;base64,${base64Data}`;
+
+  return dataURL;
+}
+
 emailRouter.post('/', zValidator('json', sendEmailSchema), async (c) => {
   let { to, subject, templateName, language, data } = c.req.valid('json')
 
   try {
     const template = getEmailTemplate(templateName, language as Language)
     if (templateName === "welcome") {
-      if (data.barcode_content === "0123456789") {
-        data.barcode_url = "https://barcodeapi.org/api/128/0123456789?"
-      }
+      const dataURL = await generateBarcodeDataURL(data.barcode_content);
+      data.barcode_url = dataURL;
     }
     await emailService.sendEmail({
       to,