Summary

One of the challenges with Mixpanel implementation is the need to manage user identification. We have so far relied on Google Analytics which identifies users through their logged-in state on Google accounts, but with Mixpanel we won’t be able to match the same users across devices unless we send them an unique user_id. We have designed a proposal to use hashed emails (from formSubmission events) as the unique user_id. The hashing process and all subsequent steps will be handled by Google Tag Manager, but we need to be able to read the submitted email from the dataLayer. 

Requirements

• In all formSubmission dataLayer event sent from Gravity Forms, we need to include a new variable 'userEmail' with the email submitted by the user:
  • 'userEmail': 'test@gmail.com' (example) 

This needs to be implemented in Gravity Forms. 

Resources

• Perhaps the Entry object can be used to retrieve the email? More information here:
  • https://docs.gravityforms.com/entry-object/ 
  • https://docs.gravityforms.com/gform_confirmation/#parameters 
• For Hubspot forms we are using an event listener (implemented through Google Tag Manager) to capture the submitted event, take a look at the example below: 

<!-- Hubspot Form Event Listener: Form Submission -->    
<script type="text/javascript">
     window.addEventListener("message", function(event) {
        if(event.data.type === 'hsFormCallback' && event.data.eventName === 'onFormSubmitted') {
           window.dataLayer.push({
              'event': 'formSubmission',
              'gGoal':'Petition Signup',
              'formID': event.data.id,
              'formPlugin': 'Hubspot', 
              'hs-form-guid': event.data.id,
              'userEmail': event.data.data.submissionValues.email
         });
        }
     });
</script>
<!-- END Hubspot Form Event Listener: Form Submission -->