Do not send push notifications for channels being actively viewed (#3931)

api/channel.go

@@ -846,8 +846,16 @@ func updateLastViewedAt(c *Context, w http.ResponseWriter, r *http.Request) {
 	params := mux.Vars(r)
 	id := params["channel_id"]
 
+	data := model.StringInterfaceFromJson(r.Body)
+
+	var active bool
+	var ok bool
+	if active, ok = data["active"].(bool); !ok {
+		active = true
+	}
+
 	doClearPush := false
-	if *utils.Cfg.EmailSettings.SendPushNotifications && !c.Session.IsMobileApp() {
+	if *utils.Cfg.EmailSettings.SendPushNotifications && !c.Session.IsMobileApp() && active {
 		if result := <-Srv.Store.User().GetUnreadCountForChannel(c.Session.UserId, id); result.Err != nil {
 			l4g.Error(utils.T("api.channel.update_last_viewed_at.get_unread_count_for_channel.error"), c.Session.UserId, id, result.Err.Error())
 		} else {
@@ -857,6 +865,12 @@ func updateLastViewedAt(c *Context, w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	go func() {
+		if err := SetActiveChannel(c.Session.UserId, id); err != nil {
+			l4g.Error(err.Error())
+		}
+	}()
+
 	Srv.Store.Channel().UpdateLastViewedAt(id, c.Session.UserId)
 
 	// Must be after update so that unread count is correct