dispatchOptimizelyEvents.js

// BEGIN: Initialize Optimizely Event Push  
function dispatchOptimizelyEvent(payload, eventID, eventKey) {
  var xmlhttp = new XMLHttpRequest();
  xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4) { // request finished and response is ready
      if(xmlhttp.status == 204) { 
        console.log('Fired event to Optimizely: ', eventKey);
      } else {
        console.log('Failed to dispatch Optimizely event: ', xmlhttp.responseText);
      } 
    }
  };
  xmlhttp.open('POST', 'https://logx.optimizely.com/v1/events', true);
  xmlhttp.setRequestHeader('Content-Type', 'application/json');
  xmlhttp.send(JSON.stringify(payload));
} 
//parse cookie
function getCookie(name) {
  var c = document.cookie.match('(^|[^;]+)\\s*' + name + '\\s*=\\s*([^;]+)');
  return c ? c.pop() : '';
}
//create event payload, takes in an event ID and the event key
function createOptimizelyEvent(eventID, eventKey) { 
  var visitorId = getCookie('optimizelyEndUserId'); //this is the visitor ID that is being used
  var timestamp = Date.now() + 1000; 
  dispatchOptimizelyEvent({
      account_id: 'Global Account ID Goes here not the Project ID',
      visitors: [{
        visitor_id: visitorId,
        attributes: [],
        snapshots: [{
          decisions: [],
          events: [{
            entity_id: eventID,
            key: eventKey,
            timestamp: timestamp,
            uuid: visitorId + '-' + timestamp.toString() //this should be as random as possible
          }]
        }]
      }],
      anonymize_ip: true,
      client_name: 'Optimizely/EventAPI',
      client_version: '1.0.0',
      enrich_decisions: true /* if this is set, we do not need to pass experiment decisions explicitly */
  }, eventID, eventKey);     
}
// END: Initialize Optimizely Event Push