From a41cc95abba54c1faced074180068bc82f51f86d Mon Sep 17 00:00:00 2001
From: anovazzi1 <otavio2204@gmail.com>
Date: Mon, 12 Jun 2023 20:26:56 -0300
Subject: [PATCH] added security check to avoid errors on building empty flows

---
 src/frontend/src/utils.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/frontend/src/utils.ts b/src/frontend/src/utils.ts
index e13f26745..b1b3c96c9 100644
--- a/src/frontend/src/utils.ts
+++ b/src/frontend/src/utils.ts
@@ -744,6 +744,9 @@ export function validateNode(n: NodeType, reactFlowInstance:ReactFlowInstance):A
 }
 
 export function validateNodes(reactFlowInstance:ReactFlowInstance){
+  if(reactFlowInstance.getNodes().length === 0){
+    return ["No nodes found in the flow. Please add at least one node to the flow."];
+  }
   return reactFlowInstance
   .getNodes()
   .flatMap((n: NodeType) => validateNode(n, reactFlowInstance));