index.js

const unifi = require('node-unifi');
const xkpasswd = require('xkpasswd');
const nodemailer = require('nodemailer');
const NODE_ENV = process.env.NODE_ENV;
if (NODE_ENV !== 'production') {
    require('dotenv').config({ path: `.env.${NODE_ENV}` });
}

const config = {
  username: process.env.UNIFI_AUTH_USERNAME,
  password: process.env.UNIFI_AUTH_PASSWORD,
  host: process.env.UNIFI_HOST_IP,
  port: process.env.UNIFI_HOST_PORT || 8443,
  site: process.env.UNIFI_SITE_NAME || 'default',
  wlan: process.env.UNIFI_WLAN_SSID,
  clients: process.env.UNIFI_CLIENTS.split(','),
  smtpHost: process.env.SMTP_HOST,
  smtpPort: process.env.SMTP_PORT,
  smtpUsername: process.env.SMTP_USERNAME,
  smtpPassword: process.env.SMTP_PASSWORD,
  emailFrom: process.env.NOTIFY_EMAIL_FROM,
  emailTo: process.env.NOTIFY_EMAIL_TO.split(','),
  emailReplyTo: process.env.NOTIFY_EMAIL_REPLY_TO
}

var controller = new unifi.Controller(config.host, config.port);

// LOGIN
controller.login(config.username, config.password, function(err) {
  controller.getWLanSettings(config.site, (err, res) => {
    if(err) {
      console.error(`ERROR: ${err}`);
      controller.logout();
      return;
    }

    const wlan = res[0].find(wlan => wlan.name === config.wlan);
    if (!wlan) {
      console.error(`ERROR: Unable to find wlan with name '${config.wlan}'. Exiting`);
      controller.logout();
      return;
    }
    const wlanId = wlan._id

    // set a new password for the specified network
    const new_password = xkpasswd({ pattern: 'wsw' });
    controller.setWLanSettings(config.site, wlanId, (err, res) => {
      if (err) {
        console.error(`ERROR: ${err}`);
        controller.logout();
        return;
      }

      console.log(`New password is ${new_password}`);

      // Disconnect devices
      let disconnectErrors = [];
      config.clients.forEach(client => {
        controller.reconnectClient(config.site, client, (err) => {
          if (err) {
            disconnectErrors.push(err);
            return;
          }
        });
      });
      
      controller.logout();

      // email new password
      const d = new Date();
      const year = d.getFullYear();
      const month = d.getMonth() < 10 ? `0${d.getMonth()}` : d.getMonth();
      const date = d.getDate() < 10 ? `0${d.getDate()}` : d.getDate();
      const subject = `jmac-kids wifi password for ${year}-${month}-${date}`;
      const body = `Today's wifi password is <b>${new_password}</b>`;

      const transporter = nodemailer.createTransport({
        host: config.smtpHost,
        port: config.smtpPort,
        secure: true,
        auth: {
          user: config.smtpUsername,
          pass: config.smtpPassword
        },
      });

      transporter.sendMail({
        from: config.emailFrom,
        to: config.emailTo,
        replyTo: config.replyTo,
        subject: subject,
        html: body
      }, (err, res) => {
        if (err) {
          console.error(`ERROR: ${err}`);
          return;
        }
        console.dir(res);
      });
    }, new_password);
  });
});