twilio-destination.js

async function onTrack(event, settings) {
  if (event.event !== settings.eventName) {
    return;
  }

  const product = event.properties.products[0];
  const itemPurchased = `${product.brand} ${product.name}`;

  const Body = `Thank you for purchasing ${itemPurchased} from our site. We will follow-up with the tracking details shortly.`;
  const To = settings.twilioDestinationNumber;

  if (settings.twilioFrom) {
    await sendText(
      {
        From: settings.twilioFrom,
        To,
        Body,
      },
      settings
    );
  }

  if (settings.twilioWhatsAppFrom) {
    // Learn more at: https://www.twilio.com/docs/whatsapp
    await sendText(
      {
        To: "whatsapp:" + To,
        From: settings.twilioWhatsAppFrom,
        Body,
      },
      settings
    );
  }
}

/**
 * Sends SMS or WhatsApp message with Twilio
 *
 * https://www.twilio.com/docs/sms
 *
 */
async function sendText(params, settings) {
  const endpoint = `https://api.twilio.com/2010-04-01/Accounts/${settings.twilioAccountId}/Messages.json`;
  await fetch(endpoint, {
    method: "POST",
    headers: {
      Authorization: `Basic ${btoa(
        settings.twilioAccountId + ":" + settings.twilioToken
      )}`,
      "Content-Type": "application/x-www-form-urlencoded;charset=UTF-8",
    },
    body: toFormParams(params),
  });
}

function toFormParams(params) {
  return Object.entries(params)
    .map(([key, value]) => {
      const paramName = encodeURIComponent(key);
      const param = encodeURIComponent(value);
      return `${paramName}=${param}`;
    })
    .join("&");
}