use user_id for client side six pack. also change name of editor free trial test

services/web/app/coffee/infrastructure/ExpressLocals.coffee

@@ -92,6 +92,9 @@ module.exports = (app, webRouter, apiRouter)->
 			if req.query.redir?
 				return "?#{querystring.stringify({redir:req.query.redir})}"
 			return ""
+
+		res.locals.getLoggedInUserId = ->
+			return req.session.user?._id
 		next()
 
 	webRouter.use (req, res, next) ->
@@ -176,3 +179,4 @@ module.exports = (app, webRouter, apiRouter)->
 		res.locals.moduleIncludesAvailable = Modules.moduleIncludesAvailable
 		next()
 
+

services/web/app/views/layout.jade

@@ -61,6 +61,7 @@ html(itemscope, itemtype='http://schema.org/Product')
 			};
 			window.systemMessages = !{JSON.stringify(systemMessages).replace(/\//g, '\\/')};
 			window.ab = {}
+			window.user_id = '#{getLoggedInUserId()}'
 
 		- if (typeof(settings.algolia) != "undefined")
 			script.

services/web/public/coffee/base.coffee

@@ -21,6 +21,7 @@ define [
 		sixpackProvider.setOptions({
 			debug: false
 			baseUrl: window.sharelatex.sixpackDomain
+			client_id: window.user_id
 		})
 
 	return App

services/web/public/coffee/main/account-upgrade.coffee

@@ -8,10 +8,10 @@ define [
 		$scope.startFreeTrial = (source, couponCode) ->
 			w = window.open()
 			sixpack.convert "track-changes-discount", ->
-			sixpack.participate 'free-trial-plan', ['student', 'collaborator'], (planName, rawResponse)->
-				ga?('send', 'event', 'subscription-funnel', 'upgraded-free-trial', source)
-				url = "/user/subscription/new?planCode=#{planName}_free_trial_7_days&ssp=#{planName == 'collaborator'}"
-				if couponCode?
-					url = "#{url}&cc=#{couponCode}"
-				$scope.startedFreeTrial = true
-				w.location = url
+				sixpack.participate 'in-editor-free-trial-plan', ['student', 'collaborator'], (planName, rawResponse)->
+					ga?('send', 'event', 'subscription-funnel', 'upgraded-free-trial', source)
+					url = "/user/subscription/new?planCode=#{planName}_free_trial_7_days&ssp=#{planName == 'collaborator'}"
+					if couponCode?
+						url = "#{url}&cc=#{couponCode}"
+					$scope.startedFreeTrial = true
+					w.location = url

services/web/public/coffee/main/new-subscription.coffee

@@ -117,7 +117,7 @@ define [
 						coupon_code:pricing.items?.coupon?.code || ""
 				$http.post("/user/subscription/create", postData)
 					.success (data, status, headers)->
-						sixpack.convert "free-trial-plan", pricing.items.plan.code, ->
+						sixpack.convert "in-editor-free-trial-plan", pricing.items.plan.code, (err)->
 							window.location.href = "/user/subscription/thank-you"
 					.error (data, status, headers)->
 						$scope.processing = false

services/web/public/js/libs/angular-sixpack.js

@@ -56,6 +56,7 @@
 							_session = new sp.Session({client_id:_clientId, base_url:_opts.baseUrl});
 						} else {
 							_session = new sp.Session({client_id:undefined, base_url:_opts.baseUrl});
+							_session = new sp.Session({client_id:_opts.client_id, base_url:_opts.baseUrl});
 							$cookies[_cookiePrefix + 'clientId'] = _clientId = _session.client_id;
 						}
 						if (_opts.debug) {