Enable Mixpanel

Closes #3347

app/assets/main.html

@@ -47,6 +47,10 @@
       (window,document,"script","51a79585ee207206390002a2");
   </script>
 
+<!-- start Mixpanel --><script type="text/javascript">(function(e,b){if(!b.__SV){var a,f,i,g;window.mixpanel=b;b._i=[];b.init=function(a,e,d){function f(b,h){var a=h.split(".");2==a.length&&(b=b[a[0]],h=a[1]);b[h]=function(){b.push([h].concat(Array.prototype.slice.call(arguments,0)))}}var c=b;"undefined"!==typeof d?c=b[d]=[]:d="mixpanel";c.people=c.people||[];c.toString=function(b){var a="mixpanel";"mixpanel"!==d&&(a+="."+d);b||(a+=" (stub)");return a};c.people.toString=function(){return c.toString(1)+".people (stub)"};i="disable time_event track track_pageview track_links track_forms register register_once alias unregister identify name_tag set_config people.set people.set_once people.increment people.append people.union people.track_charge people.clear_charges people.delete_user".split(" ");
+for(g=0;g<i.length;g++)f(c,i[g]);b._i.push([a,e,d])};b.__SV=1.2;a=e.createElement("script");a.type="text/javascript";a.async=!0;a.src="undefined"!==typeof MIXPANEL_CUSTOM_LIB_URL?MIXPANEL_CUSTOM_LIB_URL:"file:"===e.location.protocol&&"//cdn.mxpnl.com/libs/mixpanel-2-latest.min.js".match(/^\/\//)?"https://cdn.mxpnl.com/libs/mixpanel-2-latest.min.js":"//cdn.mxpnl.com/libs/mixpanel-2-latest.min.js";f=e.getElementsByTagName("script")[0];f.parentNode.insertBefore(a,f)}})(document,window.mixpanel||[]);
+mixpanel.init("e71a4e60db7e1dc5e685be96776280f9");</script><!-- end Mixpanel -->
+
   <script src="https://checkout.stripe.com/checkout.js"></script>
 
   <!-- IE9 doesn't support defer attribute: https://github.com/h5bp/lazyweb-requests/issues/42 -->

app/core/Tracker.coffee

@@ -64,7 +64,7 @@ module.exports = class Tracker
 
     for userTrait in ['email', 'anonymous', 'dateCreated', 'name', 'testGroupNumber', 'gender', 'lastLevel', 'siteref', 'ageRange']
       traits[userTrait] ?= me.get(userTrait)
-    console.log 'Would identify', traits if debugAnalytics
+    console.log 'Would identify', me.id, traits if debugAnalytics
     return unless @isProduction and not me.isAdmin()
 
     # Errorception
@@ -76,19 +76,29 @@ module.exports = class Tracker
     __insp?.push ['identify', me.id]
     __insp?.push ['tagSession', traits]
 
+    # Mixpanel
+    # https://mixpanel.com/help/reference/javascript
+    mixpanel.identify(me.id)
+    mixpanel.register(traits)
+
   trackPageView: ->
     name = Backbone.history.getFragment()
-    console.log "Would track analytics pageview: '/#{name}'" if debugAnalytics
+    url = "/#{name}"
+    console.log "Would track analytics pageview: #{url}" if debugAnalytics
     @trackEventInternal 'Pageview', url: name unless me?.isAdmin() and @isProduction
     return unless @isProduction and not me.isAdmin()
 
     # Google Analytics
     # https://developers.google.com/analytics/devguides/collection/analyticsjs/pages
-    ga? 'send', 'pageview', "/#{name}"
+    ga? 'send', 'pageview', url
 
-  trackEvent: (action, properties={}) =>
+    # Mixpanel
+    mixpanelIncludes = ['courses', 'courses/purchase', 'courses/teachers', 'courses/students', 'schools', 'teachers', 'teachers/freetrial']
+    mixpanel.track('page viewed', 'page name' : name, url : url) if name in mixpanelIncludes
+
+  trackEvent: (action, properties={}, includeIntegrations=[]) =>
     @trackEventInternal action, _.cloneDeep properties unless me?.isAdmin() and @isProduction
-    console.log 'Tracking external analytics event:', action, properties if debugAnalytics
+    console.log 'Tracking external analytics event:', action, properties, includeIntegrations if debugAnalytics
     return unless me and @isProduction and not me.isAdmin()
 
     # Google Analytics
@@ -105,6 +115,10 @@ module.exports = class Tracker
     # http://www.inspectlet.com/docs#tagging
     __insp?.push ['tagSession', action: action, properies: properties]
 
+    # Mixpanel
+    # Only log explicit events for now
+    mixpanel.track(action, properties) if 'Mixpanel' in includeIntegrations
+
   trackEventInternal: (event, properties) =>
     # Skipping heavily logged actions we don't use internally
     unless event in ['Simulator Result', 'Started Level Load', 'Finished Level Load']

app/views/SalesView.coffee

@@ -21,11 +21,11 @@ module.exports = class SalesView extends RootView
 
   onClickLogin: (e) ->
     @openModalView new AuthModal(mode: 'login') if me.get('anonymous')
-    window.tracker?.trackEvent 'Started Login', category: 'Sales', label: 'Sales Login'
+    window.tracker?.trackEvent 'Started Login', category: 'Sales', label: 'Sales Login', ['Mixpanel']
 
   onClickSignup: (e) ->
     @openModalView new AuthModal() if me.get('anonymous')
-    window.tracker?.trackEvent 'Started Signup', category: 'Sales', label: 'Sales Create'
+    window.tracker?.trackEvent 'Started Signup', category: 'Sales', label: 'Sales Create', ['Mixpanel']
 
   logoutRedirectURL: false
 

app/views/TeachersFreeTrialView.coffee

@@ -82,3 +82,4 @@ module.exports = class TeachersFreeTrialView extends RootView
         console.error 'Error saving trial request', response
       success: (model, response, options) =>
         @refreshData()
+        window.tracker?.trackEvent 'Submit Trial Request', category: 'Teachers', label: 'Trial Request', ['Mixpanel']