add api to check if failover node existed

pro/controllers/failover.go

@@ -19,12 +19,44 @@ import (
 
 // FailOverHandlers - handlers for FailOver
 func FailOverHandlers(r *mux.Router) {
+	r.HandleFunc("/api/v1/node/{nodeid}/failover", controller.Authorize(true, false, "node", http.HandlerFunc(getfailOver))).Methods(http.MethodGet)
 	r.HandleFunc("/api/v1/node/{nodeid}/failover", logic.SecurityCheck(true, http.HandlerFunc(createfailOver))).Methods(http.MethodPost)
 	r.HandleFunc("/api/v1/node/{nodeid}/failover", logic.SecurityCheck(true, http.HandlerFunc(deletefailOver))).Methods(http.MethodDelete)
 	r.HandleFunc("/api/v1/node/{network}/failover/reset", logic.SecurityCheck(true, http.HandlerFunc(resetFailOver))).Methods(http.MethodPost)
 	r.HandleFunc("/api/v1/node/{nodeid}/failover_me", controller.Authorize(true, false, "host", http.HandlerFunc(failOverME))).Methods(http.MethodPost)
 }
 
+// swagger:route GET /api/v1/node/failover node getfailOver
+//
+// get failover node.
+//
+//			Schemes: https
+//
+//			Security:
+//	  		oauth
+//
+//			Responses:
+//				200: nodeResponse
+func getfailOver(w http.ResponseWriter, r *http.Request) {
+	var params = mux.Vars(r)
+	nodeid := params["nodeid"]
+	// confirm host exists
+	node, err := logic.GetNodeByID(nodeid)
+	if err != nil {
+		slog.Error("failed to get node:", "error", err.Error())
+		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "badrequest"))
+		return
+	}
+
+	failOverNode, exists := proLogic.FailOverExists(node.Network)
+	if !exists {
+		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "notfound"))
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	logic.ReturnSuccessResponseWithJson(w, r, failOverNode, "get failover node successfully")
+}
+
 // swagger:route POST /api/v1/node/failover node createfailOver
 //
 // Create a relay.