Implement ID management and reset functionality for Ableton export

src/lib/exporters/ableton/builders.ts

@@ -32,6 +32,7 @@ import {
   gzipString,
   koEnvRangeToSeconds,
   loadTemplate,
+  resetIds,
   TIME_SIGNATURES,
   toNativePath,
 } from './utils';
@@ -611,6 +612,7 @@ async function buildReturnTrack(projectData: ProjectRawData, trackId: number = 0
 }
 
 export async function buildProject(projectData: ProjectRawData, exporterParams: ExporterParams) {
+  resetIds();
   const transformedData = abletonTransformer(projectData, exporterParams);
 
   if (import.meta.env.DEV) {

src/lib/exporters/ableton/utils.ts

@@ -31,6 +31,7 @@ const MIN_ID = 22000;
 const START_ID = 22000;
 
 let _id = START_ID;
+let assignedNodes = new WeakSet<object>();
 const templateCache: Record<string, any> = {};
 
 const templateMap: Record<string, () => Promise<any>> = {
@@ -80,27 +81,34 @@ export function fixIds(node: any): any {
     return node.map((n) => fixIds(n));
   }
 
+  if (!node || typeof node !== 'object') {
+    return node;
+  }
+
   if (node?.['@Id']) {
     const idNum = parseInt(String(node['@Id']), 10);
 
-    if (idNum > MIN_ID) {
+    if (idNum > MIN_ID && !assignedNodes.has(node)) {
       node['@Id'] = _id;
-
+      assignedNodes.add(node);
       _id++;
     }
   }
 
-  if (typeof node === 'object') {
   Object.keys(node).forEach((key) => {
     if (!key.startsWith('@')) {
       node[key] = fixIds(node[key]);
     }
   });
-  }
 
   return node;
 }
 
+export function resetIds() {
+  _id = START_ID;
+  assignedNodes = new WeakSet<object>();
+}
+
 export function getId() {
   return _id;
 }