change email address in newsletter when changing default email

put mongo_id into mailchimp merge fields

services/web/app/coffee/Features/Newsletter/NewsletterManager.coffee

@@ -4,7 +4,6 @@ Settings = require 'settings-sharelatex'
 crypto = require('crypto')
 Mailchimp = require('mailchimp-api-v3')
 
-
 if !Settings.mailchimp?.api_key?
 	logger.warn "No newsletter provider configured so not chaning email on user"
 	mailchimp =
@@ -63,5 +62,6 @@ buildOptions = (user, is_subscribed)->
 			merge_fields:
 				FNAME: user.first_name
 				LNAME: user.last_name
+				MONGO_ID:user._id
 	return opts
 

services/web/app/coffee/Features/User/UserUpdater.coffee

@@ -100,15 +100,21 @@ module.exports = UserUpdater =
 	setDefaultEmailAddress: (userId, email, callback) ->
 		email = EmailHelper.parseEmail(email)
 		return callback(new Error('invalid email')) if !email?
-		query = _id: userId, 'emails.email': email
-		update = $set: email: email
-		@updateUser query, update, (error, res) ->
-			if error?
-				logger.err error:error, 'problem setting default emails'
+		UserGetter.getUserEmail userId, (error, oldEmail) =>
+			if err?
 				return callback(error)
-			if res.n == 0 # TODO: Check n or nMatched?
-				return callback(new Error('Default email does not belong to user'))
-			callback()
+			query = _id: userId, 'emails.email': email
+			update = $set: email: email
+			@updateUser query, update, (error, res) ->
+				if error?
+					logger.err error:error, 'problem setting default emails'
+					return callback(error)
+				else if res.n == 0 # TODO: Check n or nMatched?
+					return callback(new Error('Default email does not belong to user'))
+				else
+					NewsletterManager.changeEmail oldEmail, email, callback
+
+
 
 	updateV1AndSetDefaultEmailAddress: (userId, email, callback) ->
 		@updateEmailAddressInV1 userId, email, (error) =>

services/web/test/unit/coffee/User/UserUpdaterTests.coffee

@@ -18,21 +18,27 @@ describe "UserUpdater", ->
 			getUserEmail: sinon.stub()
 			getUserByAnyEmail: sinon.stub()
 			ensureUniqueEmailAddress: sinon.stub()
-		@logger = err: sinon.stub(), log: ->
+		@logger = 
+			err: sinon.stub()
+			log: ->
+			warn: ->
 		@addAffiliation = sinon.stub().yields()
 		@removeAffiliation = sinon.stub().callsArgWith(2, null)
 		@refreshFeatures = sinon.stub().yields()
+		@NewsletterManager = 
+			changeEmail:sinon.stub()
 		@UserUpdater = SandboxedModule.require modulePath, requires:
 			"logger-sharelatex": @logger
+			"../../infrastructure/mongojs":@mongojs
+			"metrics-sharelatex": timeAsyncMethod: sinon.stub()
 			"./UserGetter": @UserGetter
 			'../Institutions/InstitutionsAPI':
 				addAffiliation: @addAffiliation
 				removeAffiliation: @removeAffiliation
 			'../Subscription/FeaturesUpdater': refreshFeatures: @refreshFeatures
-			"../../infrastructure/mongojs":@mongojs
-			"metrics-sharelatex": timeAsyncMethod: sinon.stub()
 			"settings-sharelatex": @settings = {}
 			"request": @request = {}
+			"../Newsletter/NewsletterManager": @NewsletterManager
 
 		@stubbedUser = 
 			_id: "3131231"
@@ -174,6 +180,10 @@ describe "UserUpdater", ->
 				done()
 
 	describe 'setDefaultEmailAddress', ->
+		beforeEach ->
+			@UserGetter.getUserEmail.callsArgWith(1, null, @stubbedUser.email)
+			@NewsletterManager.changeEmail.callsArgWith(2, null)
+
 		it 'set default', (done)->
 			@UserUpdater.updateUser = sinon.stub().callsArgWith(2, null, n: 1)
 
@@ -185,6 +195,16 @@ describe "UserUpdater", ->
 				).should.equal true
 				done()
 
+		it 'set changed the email in newsletter', (done)->
+			@UserUpdater.updateUser = sinon.stub().callsArgWith(2, null, n: 1)
+
+			@UserUpdater.setDefaultEmailAddress @stubbedUser._id, @newEmail, (err)=>
+				should.not.exist(err)
+				@NewsletterManager.changeEmail.calledWith(
+					@stubbedUser.email, @newEmail
+				).should.equal true
+				done()
+
 		it 'handle error', (done)->
 			@UserUpdater.updateUser = sinon.stub().callsArgWith(2, new Error('nope'))