overleaf/services/web/public/coffee/analytics/AbTestingManager.coffee

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define [
"base"
"libs/md5"
], (App) ->
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oldKeys = [
"sl_abt_multi_currency_editor_eu-eu"
"sl_abt_multi_currency_eu-eu"
"sl_abt_multi_currency_editor_eu-usd"
"sl_abt_multi_currency_eu-usd"
"sl_abt_trial_len_14d"
"sl_abt_trial_len_7d"
"sl_abt_trial_len_30d"
"sl_utt"
"sl_utt_trial_len"
"sl_utt_multi_currency"
]
App.factory "abTestManager", ($http, ipCookie) ->
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_.each oldKeys, (oldKey)->
ipCookie.remove(oldKey)
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_buildCookieKey = (testName, bucket)->
key = "sl_abt_#{testName}_#{bucket}"
return key
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_getTestCookie = (testName, bucket)->
cookieKey = _buildCookieKey(testName, bucket)
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cookie = ipCookie(cookieKey)
return cookie
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_persistCookieStep = (testName, bucket, newStep)->
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cookieKey = _buildCookieKey(testName, bucket)
ipCookie(cookieKey, {step:newStep}, {expires:100, path:"/"})
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ga('send', 'event', 'ab_tests', "#{testName}:#{bucket}", "step-#{newStep}")
_checkIfStepIsNext = (cookieStep, newStep)->
if !cookieStep? and newStep != 0
return false
else if newStep == 0
return true
else if (cookieStep+1) == newStep
return true
else
return false
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_getUsersHash = (testName)->
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sl_user_test_token = "sl_utt_#{testName}"
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user_uuid = ipCookie(sl_user_test_token)
if !user_uuid?
user_uuid = Math.random()
ipCookie(sl_user_test_token, user_uuid, {expires:365, path:"/"})
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hash = CryptoJS.MD5("#{user_uuid}:#{testName}")
return hash
processTestWithStep: processTestWithStep = (testName, bucket, newStep)->
currentCookieStep = _getTestCookie(testName, bucket)?.step
if _checkIfStepIsNext(currentCookieStep, newStep)
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_persistCookieStep(testName, bucket, newStep)
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getABTestBucket: getABTestBucket = (test_name, buckets) ->
hash = _getUsersHash(test_name)
bucketIndex = parseInt(hash.toString().slice(0,2), 16) % (buckets?.length or 2)
return buckets[bucketIndex]
App.controller "AbTestController", ($scope, abTestManager)->
testKeys = _.keys(window.ab)
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_.each window.ab, (event)->
abTestManager.processTestWithStep event.testName, event.bucket, event.step