connected user manager logic works correctly

services/web/app/coffee/Features/ConnectedUsers/ConnectedUsersManager.coffee

@@ -1,6 +1,7 @@
 _ = require("underscore")
 async = require("async")
 Settings = require('settings-sharelatex')
+logger = require("logger-sharelatex")
 redis = require('redis')
 rclient = redis.createClient(Settings.redis.web.port, Settings.redis.web.host)
 rclient.auth(Settings.redis.web.password)
@@ -12,7 +13,7 @@ buildProjectSetKey = (project_id)-> return "users_in_project:#{project_id}"
 buildUserKey = (project_id, user_id)-> return "connected_user:#{project_id}:#{user_id}"
 
 
-module.exports = 
+module.exports =
 
 	markUserAsConnected: (project_id, user_id, callback = (err)->)->
 		logger.log project_id:project_id, user_id:user_id, "marking user as connected"
@@ -20,8 +21,12 @@ module.exports =
 			(cb)->
 				rclient.sadd buildProjectSetKey(project_id), user_id, cb
 			(cb)->
-				rclient.setex buildUserKey(project_id, user_id), new Date(), ONE_HOUR_IN_S * 6, cb
-		], callback
+				ttl = ONE_HOUR_IN_S * 6
+				rclient.setex buildUserKey(project_id, user_id), ttl, new Date(), cb
+		], (err)->
+			if err?
+				logger.err err:err, project_id:project_id, user_id:user_id, "problem marking user as connected"
+			callback(err)
 
 	markUserAsDisconnected: (project_id, user_id, callback)->
 		logger.log project_id:project_id, user_id:user_id, "marking user as disconnected"
@@ -32,8 +37,6 @@ module.exports =
 				rclient.del buildUserKey(project_id, user_id), cb
 		], callback
 
-
-
 	_getConnectedUser: (project_id, user_id, callback)->
 		rclient.get buildUserKey(project_id, user_id), (err, result)->
 			if !result?
@@ -45,8 +48,7 @@ module.exports =
 
 	getConnectedUsers: (project_id, callback)->
 		self = @
-		rclient.get "connected_users_list:#{project_id}", (err, results)->
-
+		rclient.smembers buildProjectSetKey(project_id), (err, results)->
 			jobs = results.map (user_id)->
 				(cb)->
 					self._getConnectedUser(project_id, user_id, cb)

services/web/test/UnitTests/coffee/ConnectedUsersManager/ConnectedUsersManagerTests.coffee

@@ -23,6 +23,7 @@ describe "ConnectedUsersManager", ->
 			get: sinon.stub()
 			srem:sinon.stub()
 			del:sinon.stub()
+			smembers:sinon.stub()
 		tk.freeze(new Date())
 
 		@ConnectedUsersManager = SandboxedModule.require modulePath, requires:
@@ -45,7 +46,7 @@ describe "ConnectedUsersManager", ->
 		it "should set a key with the date and give it a ttl", (done)->
 			@ConnectedUsersManager.markUserAsConnected @project_id, @user_id, (err)=>
 				console.log @rClient.setex.args[0], "connected_user:#{@project_id}:#{@user_id}"
-				@rClient.setex.calledWith("connected_user:#{@project_id}:#{@user_id}", new Date(), 60 * 60 * 6).should.equal true
+				@rClient.setex.calledWith("connected_user:#{@project_id}:#{@user_id}", 60 * 60 * 6, new Date()).should.equal true
 				done()
 
 		it "should push the user_id on to the project list", (done)->
@@ -92,7 +93,7 @@ describe "ConnectedUsersManager", ->
 
 		beforeEach ->
 			@users = ["1234", "5678", "9123"]
-			@rClient.get.callsArgWith(1, null, @users)
+			@rClient.smembers.callsArgWith(1, null, @users)
 			@ConnectedUsersManager._getConnectedUser = sinon.stub()
 			@ConnectedUsersManager._getConnectedUser.withArgs(@project_id, @users[0]).callsArgWith(2, null, {connected:true, user_id:@users[0]})
 			@ConnectedUsersManager._getConnectedUser.withArgs(@project_id, @users[1]).callsArgWith(2, null, {connected:false, user_id:@users[1]})