analytics.coffee

# Extension module.
# Responsible for Google Analytics tracking.

$ = jQuery

$.extend REPLIT,
  language_start_time: null
  InitAnalytics: ->
    window._gaq.push ['_setAccount', 'UA-25629695-1']
    window._gaq.push(['_setDomainName', 'none']);
    window._gaq.push(['_setAllowLinker', true]);
    window._gaq.push(['_trackPageview']);

    ga_script = document.createElement 'script'
    ga_script.type = 'text/javascript'
    ga_script.async = true
    ga_script.src = 'http://www.google-analytics.com/ga.js'

    first_script = document.getElementsByTagName('script')[0]
    first_script.parentNode.insertBefore ga_script, first_script

$ ->
  window._gaq = window._gaq || []
  $(window).load REPLIT.InitAnalytics

  # Set up language tracking.
  REPLIT.$this.bind 'language_loading', (_, system_name) ->
    REPLIT.language_start_time = Date.now()
    window._gaq.push ['_trackEvent', 'language', 'loading', system_name]
  REPLIT.$this.bind 'language_loaded', (_, system_name) ->
    if REPLIT.language_start_time?
      time_taken = Date.now() - REPLIT.language_start_time
      # When loading the language from a session, timing is significantly skewed
      # because language loading runs in parallel with GUI loading. We log this
      # as a different event to ensure timing reports are accurate. 
      event = if REPLIT.loading_saved_lang then 'reloaded' else 'loaded'
      REPLIT.loading_saved_lang = false
      window._gaq.push ['_trackEvent', 'language',
                        event, system_name, time_taken]

  # Set up button tracking.
  $('#button-languages').click ->
    window._gaq.push ['_trackEvent', 'button', 'languages']
  $('#button-examples').click ->
    window._gaq.push ['_trackEvent', 'button', 'examples']
  $('#button-save').click ->
    window._gaq.push ['_trackEvent', 'button', 'save']
  $('#button-help').click ->
    window._gaq.push ['_trackEvent', 'button', 'help']

  # Set up footer link tracking.
  $('#link-about').click ->
    window._gaq.push ['_trackEvent', 'link', 'about']
  $('#link-source-code').click ->
    window._gaq.push ['_trackEvent', 'link', 'source']
  $('#language-about-link').click ->
    window._gaq.push ['_trackEvent', 'link', 'language']
  $('#language-engine-link').click ->
    window._gaq.push ['_trackEvent', 'link', 'engine']