Reset status to away after web conn disconnect if necessary (#8988)

app/session.go

@@ -227,6 +227,9 @@ func (a *App) AttachDeviceId(sessionId string, deviceId string, expiresAt int64)
 
 func (a *App) UpdateLastActivityAtIfNeeded(session model.Session) {
 	now := model.GetMillis()
+
+	a.UpdateWebConnUserActivity(session, now)
+
 	if now-session.LastActivityAt < model.SESSION_ACTIVITY_TIMEOUT {
 		return
 	}

app/status.go

@@ -161,6 +161,22 @@ func (a *App) GetUserStatusesByIds(userIds []string) ([]*model.Status, *model.Ap
 	return statusMap, nil
 }
 
+// SetStatusLastActivityAt sets the last activity at for a user on the local app server and updates
+// status to away if needed. Used by the WS to set status to away if an 'online' device disconnects
+// while an 'away' device is still connected
+func (a *App) SetStatusLastActivityAt(userId string, activityAt int64) {
+	var status *model.Status
+	var err *model.AppError
+	if status, err = a.GetStatus(userId); err != nil {
+		return
+	}
+
+	status.LastActivityAt = activityAt
+
+	a.AddStatusCacheSkipClusterSend(status)
+	a.SetStatusAwayIfNeeded(userId, false)
+}
+
 func (a *App) SetStatusOnline(userId string, sessionId string, manual bool) {
 	if !*a.Config().ServiceSettings.EnableUserStatuses {
 		return

app/web_conn.go

@@ -33,6 +33,7 @@ type WebConn struct {
 	Send                      chan model.WebSocketMessage
 	sessionToken              atomic.Value
 	session                   atomic.Value
+	LastUserActivityAt        int64
 	UserId                    string
 	T                         goi18n.TranslateFunc
 	Locale                    string
@@ -52,14 +53,15 @@ func (a *App) NewWebConn(ws *websocket.Conn, session model.Session, t goi18n.Tra
 	}
 
 	wc := &WebConn{
-		App:          a,
+		App:                a,
-		Send:         make(chan model.WebSocketMessage, SEND_QUEUE_SIZE),
+		Send:               make(chan model.WebSocketMessage, SEND_QUEUE_SIZE),
-		WebSocket:    ws,
+		WebSocket:          ws,
-		UserId:       session.UserId,
+		LastUserActivityAt: model.GetMillis(),
-		T:            t,
+		UserId:             session.UserId,
-		Locale:       locale,
+		T:                  t,
-		endWritePump: make(chan struct{}, 2),
+		Locale:             locale,
-		pumpFinished: make(chan struct{}, 1),
+		endWritePump:       make(chan struct{}, 2),
+		pumpFinished:       make(chan struct{}, 1),
 	}
 
 	wc.SetSession(&session)

app/web_hub.go

@@ -23,6 +23,12 @@ const (
 	DEADLOCK_WARN        = (BROADCAST_QUEUE_SIZE * 99) / 100 // number of buffered messages before printing stack trace
 )
 
+type WebConnActivityMessage struct {
+	UserId       string
+	SessionToken string
+	ActivityAt   int64
+}
+
 type Hub struct {
 	// connectionCount should be kept first.
 	// See https://github.com/mattermost/mattermost-server/pull/7281
@@ -35,6 +41,7 @@ type Hub struct {
 	stop            chan struct{}
 	didStop         chan struct{}
 	invalidateUser  chan string
+	activity        chan *WebConnActivityMessage
 	ExplicitStop    bool
 	goroutineId     int
 }
@@ -48,6 +55,7 @@ func (a *App) NewWebHub() *Hub {
 		stop:           make(chan struct{}),
 		didStop:        make(chan struct{}),
 		invalidateUser: make(chan string),
+		activity:       make(chan *WebConnActivityMessage),
 		ExplicitStop:   false,
 	}
 }
@@ -330,6 +338,13 @@ func (a *App) InvalidateWebConnSessionCacheForUser(userId string) {
 	}
 }
 
+func (a *App) UpdateWebConnUserActivity(session model.Session, activityAt int64) {
+	hub := a.GetHubForUserId(session.UserId)
+	if hub != nil {
+		hub.UpdateActivity(session.UserId, session.Token, activityAt)
+	}
+}
+
 func (h *Hub) Register(webConn *WebConn) {
 	h.register <- webConn
 
@@ -355,6 +370,10 @@ func (h *Hub) InvalidateUser(userId string) {
 	h.invalidateUser <- userId
 }
 
+func (h *Hub) UpdateActivity(userId, sessionToken string, activityAt int64) {
+	h.activity <- &WebConnActivityMessage{UserId: userId, SessionToken: sessionToken, ActivityAt: activityAt}
+}
+
 func getGoroutineId() int {
 	var buf [64]byte
 	n := runtime.Stack(buf[:], false)
@@ -395,15 +414,34 @@ func (h *Hub) Start() {
 					continue
 				}
 
-				if len(connections.ForUser(webCon.UserId)) == 0 {
+				conns := connections.ForUser(webCon.UserId)
+				if len(conns) == 0 {
 					h.app.Go(func() {
 						h.app.SetStatusOffline(webCon.UserId, false)
 					})
+				} else {
+					var latestActivity int64 = 0
+					for _, conn := range conns {
+						if conn.LastUserActivityAt > latestActivity {
+							latestActivity = conn.LastUserActivityAt
+						}
+					}
+					if h.app.IsUserAway(latestActivity) {
+						h.app.Go(func() {
+							h.app.SetStatusLastActivityAt(webCon.UserId, latestActivity)
+						})
+					}
 				}
 			case userId := <-h.invalidateUser:
 				for _, webCon := range connections.ForUser(userId) {
 					webCon.InvalidateCache()
 				}
+			case activity := <-h.activity:
+				for _, webCon := range connections.ForUser(activity.UserId) {
+					if webCon.GetSessionToken() == activity.SessionToken {
+						webCon.LastUserActivityAt = activity.ActivityAt
+					}
+				}
 			case msg := <-h.broadcast:
 				candidates := connections.All()
 				if msg.Broadcast.UserId != "" {