Added shared mailer package to remove circular dependencies between packages. (#63)

packages/mailers/nodemailer/src/index.ts

@@ -0,0 +1,26 @@
+import 'server-only';
+
+import { z } from 'zod';
+
+import { Mailer, MailerSchema } from '@kit/mailers-shared';
+
+import { getSMTPConfiguration } from './smtp-configuration';
+
+type Config = z.infer<typeof MailerSchema>;
+
+export function createNodemailerService() {
+  return new Nodemailer();
+}
+
+/**
+ * A class representing a mailer using Nodemailer library.
+ * @implements {Mailer}
+ */
+class Nodemailer implements Mailer {
+  async sendEmail(config: Config) {
+    const { createTransport } = await import('nodemailer');
+    const transporter = createTransport(getSMTPConfiguration());
+
+    return transporter.sendMail(config);
+  }
+}