add cooldown to tpds `mergeUpdate` path

services/web/app/coffee/Features/Errors/ErrorController.coffee

@@ -22,6 +22,9 @@ module.exports = ErrorController =
 		if error instanceof Errors.NotFoundError
 			logger.warn {err: error, url: req.url}, "not found error"
 			ErrorController.notFound req, res
+		else if error instanceof Errors.TooManyRequestsError
+			logger.warn {err: error, url: req.url}, "too many requests error"
+			res.sendStatus(429)
 		else
 			logger.error err: error, url:req.url, method:req.method, user:user, "error passed to top level next middlewear"
 			ErrorController.serverError req, res

services/web/app/coffee/Features/Errors/Errors.coffee

@@ -11,8 +11,18 @@ ServiceNotConfiguredError = (message) ->
 	error.name = "ServiceNotConfiguredError"
 	error.__proto__ = ServiceNotConfiguredError.prototype
 	return error
+ServiceNotConfiguredError.prototype.__proto__ = Error.prototype
+
+
+TooManyRequestsError = (message) ->
+	error = new Error(message)
+	error.name = "TooManyRequestsError"
+	error.__proto__ = TooManyRequestsError.prototype
+	return error
+TooManyRequestsError.prototype.__proto__ = Error.prototype
 
 
 module.exports = Errors =
 	NotFoundError: NotFoundError
 	ServiceNotConfiguredError: ServiceNotConfiguredError
+	TooManyRequestsError: TooManyRequestsError

services/web/app/coffee/Features/ThirdPartyDataStore/TpdsUpdateHandler.coffee

@@ -5,6 +5,8 @@ projectCreationHandler = require('../Project/ProjectCreationHandler')
 projectDeleter = require('../Project/ProjectDeleter')
 ProjectRootDocManager   = require "../Project/ProjectRootDocManager"
 FileTypeManager = require('../Uploads/FileTypeManager')
+CooldownManager = require('../Cooldown/CooldownManager')
+Errors = require('../Errors/Errors')
 
 commitMessage = "Before update from Dropbox"
 
@@ -24,10 +26,15 @@ module.exports =
 					cb err, project
 		getOrCreateProject (err, project)->
 			return callback(err) if err?
-			FileTypeManager.shouldIgnore path, (err, shouldIgnore)->
-				if shouldIgnore
-					return callback()
-				updateMerger.mergeUpdate user_id, project._id, path, updateRequest, source, callback
+			CooldownManager.isProjectOnCooldown project._id, (err, projectIsOnCooldown) ->
+				return callback(err) if err?
+				if projectIsOnCooldown
+					logger.log {projectId: project._id}, "project is on cooldown, denying request"
+					return callback(new Errors.TooManyRequestsError('project on cooldown'))
+				FileTypeManager.shouldIgnore path, (err, shouldIgnore)->
+					if shouldIgnore
+						return callback()
+					updateMerger.mergeUpdate user_id, project._id, path, updateRequest, source, callback
 
 
 	deleteUpdate: (user_id, projectName, path, source, callback)->	

services/web/test/UnitTests/coffee/ThirdPartyDataStore/TpdsUpdateHandlerTests.coffee

@@ -1,6 +1,7 @@
 SandboxedModule = require('sandboxed-module')
 sinon = require('sinon')
 require('chai').should()
+expect = require('chai').expect
 modulePath = require('path').join __dirname, '../../../../app/js/Features/ThirdPartyDataStore/TpdsUpdateHandler.js'
 
 describe 'TpdsUpdateHandler', ->
@@ -19,6 +20,8 @@ describe 'TpdsUpdateHandler', ->
 		@rootDocManager = setRootDocAutomatically:sinon.stub()
 		@FileTypeManager =
 			shouldIgnore: sinon.stub().callsArgWith(1, null, false)
+		@CooldownManager =
+			isProjectOnCooldown: sinon.stub().callsArgWith(1, null, false)
 		@handler = SandboxedModule.require modulePath, requires:
 			'./UpdateMerger': @updateMerger
 			'./Editor/EditorController': @editorController
@@ -27,6 +30,7 @@ describe 'TpdsUpdateHandler', ->
 			'../Project/ProjectDeleter': @projectDeleter
 			"../Project/ProjectRootDocManager" : @rootDocManager
 			'../Uploads/FileTypeManager': @FileTypeManager
+			'../Cooldown/CooldownManager': @CooldownManager
 			'logger-sharelatex': log:->
 		@user_id = "dsad29jlkjas"
 		@source = "dropbox"
@@ -67,6 +71,38 @@ describe 'TpdsUpdateHandler', ->
 				@updateMerger.mergeUpdate.called.should.equal false
 				done()
 
+		it 'should check if the project is on cooldown', (done) ->
+			@CooldownManager.isProjectOnCooldown = sinon.stub().callsArgWith(1, null, false)
+			@projectLocator.findUsersProjectByName = sinon.stub().callsArgWith(2)
+			path = "/path/here"
+			update = {}
+			@updateMerger.mergeUpdate = sinon.stub()
+			@updateMerger.mergeUpdate.withArgs(@user_id, @project_id, path, update, @source).callsArg(5)
+			@handler.newUpdate @user_id, @project.name, path, update, @source, (err) =>
+				expect(err).to.be.oneOf [null, undefined]
+				@CooldownManager.isProjectOnCooldown.callCount.should.equal 1
+				@CooldownManager.isProjectOnCooldown.calledWith(@project_id).should.equal true
+				@FileTypeManager.shouldIgnore.callCount.should.equal 1
+				@updateMerger.mergeUpdate.callCount.should.equal 1
+				done()
+
+		it 'should return error and not proceed with update if project is on cooldown', (done) ->
+			@CooldownManager.isProjectOnCooldown = sinon.stub().callsArgWith(1, null, true)
+			@projectLocator.findUsersProjectByName = sinon.stub().callsArgWith(2)
+			@FileTypeManager.shouldIgnore = sinon.stub().callsArgWith(1, null, false)
+			path = "/path/here"
+			update = {}
+			@updateMerger.mergeUpdate = sinon.stub()
+			@updateMerger.mergeUpdate.withArgs(@user_id, @project_id, path, update, @source).callsArg(5)
+			@handler.newUpdate @user_id, @project.name, path, update, @source, (err) =>
+				expect(err).to.not.be.oneOf [null, undefined]
+				expect(err).to.be.instanceof Error
+				@CooldownManager.isProjectOnCooldown.callCount.should.equal 1
+				@CooldownManager.isProjectOnCooldown.calledWith(@project_id).should.equal true
+				@FileTypeManager.shouldIgnore.callCount.should.equal 0
+				@updateMerger.mergeUpdate.callCount.should.equal 0
+				done()
+
 	describe 'getting a delete :', ->
 		it 'should call deleteEntity in the collaberation manager', (done)->
 			path = "/delete/this"