From b431839bcea7e4b9c089a3ede7bb74725d6b6fcf Mon Sep 17 00:00:00 2001
From: Lucas Oliveira <lucas.edu.oli@hotmail.com>
Date: Thu, 19 Oct 2023 17:20:21 -0300
Subject: [PATCH] Fixed bug where it does not open and does not save correctly

---
 src/frontend/src/contexts/undoRedoContext.tsx | 20 ++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/src/frontend/src/contexts/undoRedoContext.tsx b/src/frontend/src/contexts/undoRedoContext.tsx
index 83dfd8f32..d348d12c3 100644
--- a/src/frontend/src/contexts/undoRedoContext.tsx
+++ b/src/frontend/src/contexts/undoRedoContext.tsx
@@ -54,11 +54,21 @@ export function UndoRedoProvider({ children }) {
     // push the current graph to the past state
     setPast((old) => {
       let newPast = cloneDeep(old);
-      newPast[tabIndex] = old[tabIndex].slice(
-        old[tabIndex].length - defaultOptions.maxHistorySize + 1,
-        old[tabIndex].length
-      );
-      newPast[tabIndex].push({ nodes: getNodes(), edges: getEdges() });
+      let newState = {
+        nodes: cloneDeep(getNodes()),
+        edges: cloneDeep(getEdges()),
+      };
+      if (
+        old[tabIndex] &&
+        JSON.stringify(old[tabIndex][old[tabIndex].length - 1]) !==
+          JSON.stringify(newState)
+      ) {
+        newPast[tabIndex] = old[tabIndex].slice(
+          old[tabIndex].length - defaultOptions.maxHistorySize + 1,
+          old[tabIndex].length
+        );
+        newPast[tabIndex].push(newState);
+      }
       return newPast;
     });