chore: heygermany customer project

packages/functions/src/services/mailgun/mailgun.ts

@@ -0,0 +1,66 @@
+import Mailgun from 'mailgun.js'
+import formData from 'form-data'
+import type {
+  EmailService,
+  SendEmailInput,
+  SendEmailResult,
+} from '@pikku/core/services'
+
+const isProduction = process.env.NODE_ENV === 'production'
+
+export class MailgunEmailService implements EmailService {
+  private readonly mg: ReturnType<Mailgun['client']> | undefined
+
+  constructor(
+    apiKey: string | undefined,
+    private readonly domain: string,
+  ) {
+    if (apiKey) {
+      const mailgun = new Mailgun(formData)
+      this.mg = mailgun.client({
+        username: 'api',
+        key: apiKey,
+        url: 'https://api.eu.mailgun.net',
+      })
+    }
+  }
+
+  async send(input: SendEmailInput): Promise<SendEmailResult> {
+    if ('template' in input) {
+      throw new Error('MailgunEmailService expects rendered email content, not template references')
+    }
+
+    if (!isProduction || !this.mg) {
+      const recipients = normalizeRecipients(input.to)
+      console.log(
+        `Would have sent email to ${recipients.join(', ')} with subject "${input.subject || ''}"`
+      )
+      return {}
+    }
+
+    const result = await this.mg.messages.create('mail.hey-germany.com', {
+      from: input.from || `HeyGermany <info@${this.domain}>`,
+      to: normalizeRecipients(input.to),
+      cc: normalizeRecipients(input.cc),
+      bcc: normalizeRecipients(input.bcc),
+      subject: input.subject,
+      html: 'html' in input ? input.html : undefined,
+      text: 'text' in input ? input.text : undefined,
+      h: input.headers,
+    } as any)
+
+    return {
+      messageId: typeof result === 'object' && result && 'id' in result
+        ? String(result.id)
+        : undefined,
+    }
+  }
+}
+
+const normalizeRecipients = (value?: string | string[]) => {
+  if (!value) {
+    return []
+  }
+
+  return Array.isArray(value) ? value : [value]
+}