Can ask student browser where they are in the page

direct.go

@@ -35,7 +35,7 @@ func declareAPIAdminDirectRoutes(router *gin.RouterGroup) {
 }
 
 func WSSurveyStats(sid int64) map[string]interface{} {
-	var users []string
+	var users []map[string]interface{}
 	var nb int
 
 	WSClientsMutex.RLock()
@@ -43,7 +43,10 @@ func WSSurveyStats(sid int64) map[string]interface{} {
 	if w, ok := WSClients[sid]; ok {
 		nb = len(w)
 		for _, ws := range w {
-			users = append(users, ws.u.Login)
+			users = append(users, map[string]interface{}{
+				"id":    ws.u.Id,
+				"login": ws.u.Login,
+			})
 		}
 	}
 
@@ -139,6 +142,26 @@ func SurveyWS(c *gin.Context) {
 	ch <- msgCurrentState(survey)
 
 	go SurveyWS_run(ws, ch, survey.Id, u)
+	go func(c chan WSMessage, sid int) {
+		var v WSMessage
+		var err error
+		for {
+			err = wsjson.Read(context.Background(), ws, &v)
+			if err != nil {
+				log.Println("Error when receiving message:", err)
+				close(c)
+				break
+			}
+
+			if v.Action == "myscroll" {
+				v.UserId = &u.Id
+				v.SurveyId = &survey.Id
+				WSAdminWriteAll(v)
+			} else {
+				log.Println("Unknown ws response:", v.Action)
+			}
+		}
+	}(ch, int(survey.Id))
 }
 
 func WSWriteAll(message WSMessage) {
@@ -423,6 +446,8 @@ func SurveyWSAdmin(c *gin.Context) {
 						}
 					}
 				}
+			} else if v.Action == "where_are_you" {
+				survey.WSWriteAll(v)
 			} else {
 				log.Println("Unknown admin action:", v.Action)
 			}