merge of features from hosted branch (#7)

major merge of features from the hosted branch that was created temporarily during the initial launch of jambonz.org

lib/utils/email-utils.js

@@ -0,0 +1,34 @@
+const formData = require('form-data');
+const Mailgun = require('mailgun.js');
+const mailgun = new Mailgun(formData);
+const validateEmail = (email) => {
+  // eslint-disable-next-line max-len
+  const re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
+  return re.test(email);
+};
+
+const emailSimpleText = async(logger, to, subject, text) => {
+  const mg = mailgun.client({
+    username: 'api',
+    key: process.env.MAILGUN_API_KEY
+  });
+  if (!process.env.MAILGUN_API_KEY) throw new Error('MAILGUN_API_KEY env variable is not defined!');
+  if (!process.env.MAILGUN_DOMAIN) throw new Error('MAILGUN_DOMAIN env variable is not defined!');
+
+  try {
+    const res = await mg.messages.create(process.env.MAILGUN_DOMAIN, {
+      from: 'jambonz Support <support@jambonz.org>',
+      to,
+      subject,
+      text
+    });
+    logger.debug({res}, 'sent email');
+  } catch (err) {
+    logger.info({err}, 'Error sending email');
+  }
+};
+
+module.exports = {
+  validateEmail,
+  emailSimpleText
+};