initiall commit

apps/auth/src/lib/mail.ts

@@ -0,0 +1,52 @@
+import nodemailer from "nodemailer";
+import { Resend } from "resend";
+
+import { env } from "./env.js";
+
+const resend = env.RESEND_API_KEY ? new Resend(env.RESEND_API_KEY) : null;
+
+const transporter =
+  !resend && env.SMTP_HOST
+    ? nodemailer.createTransport({
+        host: env.SMTP_HOST,
+        port: env.SMTP_PORT,
+        secure: false,
+        auth: env.SMTP_USER
+          ? {
+              user: env.SMTP_USER,
+              pass: env.SMTP_PASSWORD,
+            }
+          : undefined,
+      })
+    : null;
+
+export async function sendTransactionalEmail(input: {
+  to: string;
+  subject: string;
+  text: string;
+  html: string;
+}) {
+  if (resend) {
+    await resend.emails.send({
+      from: env.MAIL_FROM,
+      to: [input.to],
+      subject: input.subject,
+      text: input.text,
+      html: input.html,
+    });
+    return;
+  }
+
+  if (!transporter) {
+    throw new Error("No mail transport configured for auth service.");
+  }
+
+  await transporter.sendMail({
+    from: env.MAIL_FROM,
+    to: input.to,
+    subject: input.subject,
+    text: input.text,
+    html: input.html,
+  });
+}
+