functional with immer

gpx/package-lock.json

@@ -9,6 +9,7 @@
             "version": "1.0.0",
             "dependencies": {
                 "fast-xml-parser": "^4.3.6",
+                "immer": "^10.1.1",
                 "ts-node": "^10.9.2"
             },
             "devDependencies": {
@@ -1958,6 +1959,15 @@
                 "node": ">=10.17.0"
             }
         },
+        "node_modules/immer": {
+            "version": "10.1.1",
+            "resolved": "https://registry.npmjs.org/immer/-/immer-10.1.1.tgz",
+            "integrity": "sha512-s2MPrmjovJcoMaHtx6K11Ra7oD05NT97w1IC5zpMkT6Atjr7H8LjaDd81iIxUYpMKSRRNMJE703M1Fhr/TctHw==",
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/immer"
+            }
+        },
         "node_modules/import-local": {
             "version": "3.1.0",
             "resolved": "https://registry.npmjs.org/import-local/-/import-local-3.1.0.tgz",

gpx/package.json

@@ -12,6 +12,7 @@
     "private": true,
     "dependencies": {
         "fast-xml-parser": "^4.3.6",
+        "immer": "^10.1.1",
         "ts-node": "^10.9.2"
     },
     "scripts": {
@@ -26,4 +27,4 @@
         "ts-jest": "^29.1.2",
         "typescript": "^5.4.5"
     }
-}
+}

gpx/src/gpx.ts

@@ -1,4 +1,5 @@
 import { Coordinates, GPXFileAttributes, GPXFileType, Link, Metadata, TrackExtensions, TrackPointExtensions, TrackPointType, TrackSegmentType, TrackType, WaypointType } from "./types";
+import { immerable } from "immer";
 
 function cloneJSON<T>(obj: T): T {
     if (obj === null || typeof obj !== 'object') {
@@ -120,6 +121,8 @@ export class GPXFiles extends GPXTreeNode<GPXFile> {
 
 // A class that represents a GPX file
 export class GPXFile extends GPXTreeNode<Track>{
+    [immerable] = true;
+
     attributes: GPXFileAttributes;
     metadata: Metadata;
     wpt: Waypoint[];
@@ -176,6 +179,8 @@ export class GPXFile extends GPXTreeNode<Track>{
 
 // A class that represents a Track in a GPX file
 export class Track extends GPXTreeNode<TrackSegment> {
+    [immerable] = true;
+
     name?: string;
     cmt?: string;
     desc?: string;
@@ -256,6 +261,8 @@ export class Track extends GPXTreeNode<TrackSegment> {
 
 // A class that represents a TrackSegment in a GPX file
 export class TrackSegment extends GPXTreeLeaf {
+    [immerable] = true;
+
     trkpt: TrackPoint[];
 
     constructor(segment?: TrackSegmentType | TrackSegment) {
@@ -432,6 +439,8 @@ export class TrackSegment extends GPXTreeLeaf {
 };
 
 export class TrackPoint {
+    [immerable] = true;
+
     attributes: Coordinates;
     ele?: number;
     time?: Date;