PLT-2241 Refactored statuses into a more real-time system (#3573)

* Refactored statuses into a more real-time system

* Updated package.json with correct commit and fixed minor bug

* Minor updates to statuses based on feedback

* When setting status online, update only LastActivityAt if status already exists

api/general.go

@@ -73,7 +73,12 @@ func ping(c *Context, w http.ResponseWriter, r *http.Request) {
 	w.Write([]byte(model.MapToJson(m)))
 }
 
-func webSocketPing(req *model.WebSocketRequest, responseData map[string]interface{}) *model.AppError {
-	responseData["text"] = "pong"
-	return nil
+func webSocketPing(req *model.WebSocketRequest) (map[string]interface{}, *model.AppError) {
+	data := map[string]interface{}{}
+	data["text"] = "pong"
+	data["version"] = model.CurrentVersion
+	data["server_time"] = model.GetMillis()
+	data["node_id"] = ""
+
+	return data, nil
 }