added ttl to the users set to keep redis clean from inactive projects

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

@@ -8,6 +8,8 @@ rclient.auth(Settings.redis.web.password)
 
 
 ONE_HOUR_IN_S = 60 * 60
+ONE_DAY_IN_S = ONE_HOUR_IN_S * 24
+FOUR_DAYS_IN_S = ONE_DAY_IN_S * 4
 
 buildProjectSetKey = (project_id)-> return "users_in_project:#{project_id}"
 buildUserKey = (project_id, user_id)-> return "connected_user:#{project_id}:#{user_id}"
@@ -21,8 +23,9 @@ module.exports =
 			(cb)->
 				rclient.sadd buildProjectSetKey(project_id), user_id, cb
 			(cb)->
-				ttl = ONE_HOUR_IN_S * 6
-				rclient.setex buildUserKey(project_id, user_id), ttl, new Date(), cb
+				rclient.expire buildProjectSetKey(project_id), FOUR_DAYS_IN_S, cb
+			(cb)->
+				rclient.setex buildUserKey(project_id, user_id), ONE_HOUR_IN_S, new Date(), cb
 		], (err)->
 			if err?
 				logger.err err:err, project_id:project_id, user_id:user_id, "problem marking user as connected"
@@ -33,6 +36,8 @@ module.exports =
 		async.series [
 			(cb)->
 				rclient.srem buildProjectSetKey(project_id), user_id, cb
+			(cb)->
+				rclient.expire buildProjectSetKey(project_id), FOUR_DAYS_IN_S, cb
 			(cb)->
 				rclient.del buildUserKey(project_id, user_id), cb
 		], callback

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

@@ -24,6 +24,7 @@ describe "ConnectedUsersManager", ->
 			srem:sinon.stub()
 			del:sinon.stub()
 			smembers:sinon.stub()
+			expire:sinon.stub()
 		tk.freeze(new Date())
 
 		@ConnectedUsersManager = SandboxedModule.require modulePath, requires:
@@ -41,12 +42,12 @@ describe "ConnectedUsersManager", ->
 		beforeEach ->
 			@rClient.setex.callsArgWith(3)
 			@rClient.sadd.callsArgWith(2)
+			@rClient.expire.callsArgWith(2)
 
 
 		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}", 60 * 60 * 6, new Date()).should.equal true
+				@rClient.setex.calledWith("connected_user:#{@project_id}:#{@user_id}", 60 * 60, new Date()).should.equal true
 				done()
 
 		it "should push the user_id on to the project list", (done)->
@@ -54,10 +55,16 @@ describe "ConnectedUsersManager", ->
 				@rClient.sadd.calledWith("users_in_project:#{@project_id}", @user_id).should.equal true
 				done()
 
+		it "should add a ttl to the connected user set so it stays clean", (done)->
+			@ConnectedUsersManager.markUserAsConnected @project_id, @user_id, (err)=>
+				@rClient.expire.calledWith("users_in_project:#{@project_id}", 24 * 4 * 60 * 60).should.equal true
+				done()
+
 	describe "markUserAsDisconnected", ->
 		beforeEach ->
 			@rClient.srem.callsArgWith(2)
 			@rClient.del.callsArgWith(1)
+			@rClient.expire.callsArgWith(2)
 
 		it "should remove the user from the set", (done)->
 			@ConnectedUsersManager.markUserAsDisconnected @project_id, @user_id, (err)=>
@@ -69,6 +76,10 @@ describe "ConnectedUsersManager", ->
 				@rClient.del.calledWith("connected_user:#{@project_id}:#{@user_id}").should.equal true
 				done()
 
+		it "should add a ttl to the connected user set so it stays clean", (done)->
+			@ConnectedUsersManager.markUserAsDisconnected @project_id, @user_id, (err)=>
+				@rClient.expire.calledWith("users_in_project:#{@project_id}", 24 * 4 * 60 * 60).should.equal true
+				done()
 
 
 	describe "_getConnectedUser", ->