Refactor email mailer out for use elsewhere

Author: pimterry

api/src/email.ts

@@ -0,0 +1,23 @@
+import nodemailer from 'nodemailer';
+
+const {
+    SMTP_HOST,
+    SMTP_PORT,
+    SMTP_USERNAME,
+    SMTP_PASSWORD
+} = process.env;
+
+if (!SMTP_HOST) throw new Error('No SMTP host configured');
+if (!SMTP_PORT) throw new Error('No SMTP port configured');
+if (!SMTP_USERNAME) throw new Error('No SMTP user configured');
+if (!SMTP_PASSWORD) throw new Error('No SMTP password configured');
+
+export const mailer = nodemailer.createTransport({
+    host: SMTP_HOST,
+    port: Number(SMTP_PORT),
+    secure: true,
+    auth: {
+        user: SMTP_USERNAME,
+        pass: SMTP_PASSWORD
+    }
+});

api/src/functions/contact-form.ts

@@ -1,36 +1,14 @@
 import * as _ from 'lodash';
-import nodemailer from 'nodemailer';
 import * as log from 'loglevel';
 import { delay } from '@httptoolkit/util';
 
 import { catchErrors, reportError } from '../errors';
 import { getCorsResponseHeaders } from '../cors';
+import { mailer } from '../email';
 
-const {
-    CONTACT_FORM_DESTINATION,
-    SMTP_HOST,
-    SMTP_PORT,
-    SMTP_USERNAME,
-    SMTP_PASSWORD
-} = process.env;
-
+const { CONTACT_FORM_DESTINATION } = process.env;
 if (!CONTACT_FORM_DESTINATION) throw new Error('No contact form destination configured');
 
-if (!SMTP_HOST) throw new Error('No SMTP host configured');
-if (!SMTP_PORT) throw new Error('No SMTP port configured');
-if (!SMTP_USERNAME) throw new Error('No SMTP user configured');
-if (!SMTP_PASSWORD) throw new Error('No SMTP password configured');
-
-const mailer = nodemailer.createTransport({
-    host: SMTP_HOST,
-    port: Number(SMTP_PORT),
-    secure: true,
-    auth: {
-        user: SMTP_USERNAME,
-        pass: SMTP_PASSWORD
-    }
-});
-
 const THANK_YOU_PAGE = 'https://httptoolkit.com/contact-thank-you/'
 
 export const handler = catchErrors(async (event) => {