From 3dcfa2cc8a82dba94115678777c3d53cfdc6ef68 Mon Sep 17 00:00:00 2001
From: Matt Lott <mattlott@live.com>
Date: Fri, 2 Sep 2016 15:33:16 -0700
Subject: [PATCH] A/b test default language in home product

---
 app/models/User.coffee                      | 10 +++++++++
 app/views/play/modal/PlayHeroesModal.coffee | 23 ++++++++++++++-------
 2 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/app/models/User.coffee b/app/models/User.coffee
index 1e63b65b5..167f4dd11 100644
--- a/app/models/User.coffee
+++ b/app/models/User.coffee
@@ -197,6 +197,16 @@ module.exports = class User extends CocoModel
     application.tracker.identify hintsGroup: @hintsGroup unless me.isAdmin()
     @hintsGroup
 
+  getDefaultLanguageGroup: ->
+    # A/B test default programming language in home version
+    return @defaultLanguageGroup if @defaultLanguageGroup
+    group = me.get('testGroupNumber') % 2
+    @defaultLanguageGroup = switch group
+      when 0 then 'javascript'
+      when 1 then 'python'
+    application.tracker.identify defaultLanguageGroup: @defaultLanguageGroup unless me.isAdmin()
+    @defaultLanguageGroup
+
   getVideoTutorialStylesIndex: (numVideos=0)->
     # A/B Testing video tutorial styles
     # Not a constant number of videos available (e.g. could be 0, 1, 3, or 4 currently)
diff --git a/app/views/play/modal/PlayHeroesModal.coffee b/app/views/play/modal/PlayHeroesModal.coffee
index 3114834d2..731a9f514 100644
--- a/app/views/play/modal/PlayHeroesModal.coffee
+++ b/app/views/play/modal/PlayHeroesModal.coffee
@@ -107,12 +107,21 @@ module.exports = class PlayHeroesModal extends ModalView
         {id: 'javascript', name: 'JavaScript'}
       ]
     else
-      @codeLanguageList = [
-        {id: 'python', name: "Python (#{$.i18n.t('choose_hero.default')})"}
-        {id: 'javascript', name: 'JavaScript'}
-        {id: 'coffeescript', name: "CoffeeScript (#{$.i18n.t('choose_hero.experimental')})"}
-        {id: 'lua', name: 'Lua'}
-      ]
+      @codeLanguageList = switch me.getDefaultLanguageGroup()
+        when 'javascript'
+          [
+            {id: 'javascript', name: "JavaScript (#{$.i18n.t('choose_hero.default')})"}
+            {id: 'python', name: "Python"}
+            {id: 'coffeescript', name: "CoffeeScript (#{$.i18n.t('choose_hero.experimental')})"}
+            {id: 'lua', name: 'Lua'}
+          ]
+        else
+          [
+            {id: 'python', name: "Python (#{$.i18n.t('choose_hero.default')})"}
+            {id: 'javascript', name: 'JavaScript'}
+            {id: 'coffeescript', name: "CoffeeScript (#{$.i18n.t('choose_hero.experimental')})"}
+            {id: 'lua', name: 'Lua'}
+          ]
 
       if me.isAdmin() or not application.isProduction()
         @codeLanguageList.push {id: 'java', name: "Java (#{$.i18n.t('choose_hero.experimental')})"}
@@ -226,7 +235,7 @@ module.exports = class PlayHeroesModal extends ModalView
   onCodeLanguageChanged: (e) ->
     @codeLanguage = @$el.find('#option-code-language').val()
     @codeLanguageChanged = true
-
+    window.tracker?.trackEvent 'Campaign changed code language', category: 'Campaign Hero Select', codeLanguage: @codeLanguage, levelSlug: @options.level?.get('slug')
 
   #- Purchasing the hero