postmark

// lib/postmark.ts — Postmark client
import { ServerClient } from 'postmark'

const client = new ServerClient(process.env.POSTMARK_API_TOKEN!)

// Send with HTML
await client.sendEmail({
  From: 'notifications@myapp.com',
  To: 'user@example.com',
  Subject: 'Your order has shipped',
  HtmlBody: '<h1>Order Shipped!</h1><p>Tracking: ABC123</p>',
  TextBody: 'Order Shipped! Tracking: ABC123',
  MessageStream: 'outbound',          // 'outbound' for transactional, 'broadcast' for marketing
})

// Send with template
await client.sendEmailWithTemplate({
  From: 'notifications@myapp.com',
  To: 'user@example.com',
  TemplateAlias: 'order-shipped',
  TemplateModel: {
    customer_name: 'Alice',
    order_id: 'ORD-2025-001',
    tracking_number: 'ABC123',
    tracking_url: 'https://track.example.com/ABC123',
    items: [
      { name: 'Widget Pro', quantity: 2, price: '$29.99' },
      { name: 'Gadget Plus', quantity: 1, price: '$49.99' },
    ],
  },
  MessageStream: 'outbound',
})

// Send up to 500 emails in one API call
await client.sendEmailBatch([
  {
    From: 'billing@myapp.com',
    To: 'user1@example.com',
    Subject: 'Invoice #INV-001',
    HtmlBody: renderInvoice(invoice1),
    Tag: 'invoice',
  },
  {
    From: 'billing@myapp.com',
    To: 'user2@example.com',
    Subject: 'Invoice #INV-002',
    HtmlBody: renderInvoice(invoice2),
    Tag: 'invoice',
  },
])

// Postmark can forward inbound emails to your webhook
// POST /webhooks/inbound-email
export async function handleInboundEmail(req) {
  const { From, Subject, TextBody, Attachments } = req.body

  // Process support emails
  await createSupportTicket({
    from: From,
    subject: Subject,
    body: TextBody,
    attachments: Attachments.map(a => ({
      name: a.Name,
      content: Buffer.from(a.Content, 'base64'),
    })),
  })
}