From a5eb50f5b7d497b9b4b0351efbad4ed9684cb281 Mon Sep 17 00:00:00 2001
From: Sipke Schoorstra <sipkeschoorstra@outlook.com>
Date: Wed, 8 Jun 2022 21:23:55 +0200
Subject: [PATCH] Ensure activity walker does not change source object

---
 .../components/activities/flowchart/activity-walker.ts    | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/designer/elsa-workflows-designer/src/components/activities/flowchart/activity-walker.ts b/src/designer/elsa-workflows-designer/src/components/activities/flowchart/activity-walker.ts
index f91154299..a29740a24 100644
--- a/src/designer/elsa-workflows-designer/src/components/activities/flowchart/activity-walker.ts
+++ b/src/designer/elsa-workflows-designer/src/components/activities/flowchart/activity-walker.ts
@@ -18,10 +18,13 @@ export interface ActivityPort {
 }
 
 export function walkActivities(root: Activity, descriptors: Array<ActivityDescriptor>): ActivityNode {
-  const collectedActivities = new Set<Activity>([root]);
+  // Create a copy of the root to avoid transposing its outbound properties.
+  const rootCopy = {...root};
+  
+  const collectedActivities = new Set<Activity>([rootCopy]);
   const graph: ActivityNode = {activity: root, parents: [], children: []};
   const collectedNodes = new Set<ActivityNode>([graph]);
-  walkRecursive(graph, root, collectedActivities, collectedNodes, descriptors);
+  walkRecursive(graph, rootCopy, collectedActivities, collectedNodes, descriptors);
   return graph;
 }
 
@@ -65,6 +68,7 @@ function getPorts(node: ActivityNode, activity: Activity, descriptors: Array<Act
   const transposeHandler = transposeHandlerRegistry.get(activity.typeName);
   const portProvider = portProviderRegistry.get(activity.typeName);
   const activityDescriptor = descriptors.find(x => x.activityType == activity.typeName);
+  debugger;
   const untransposedConnections = transposeHandler.untranspose({activity, activityDescriptor});
   return untransposedConnections.map(x => ({activity: x.target, port: x.sourcePort}));
 }