Changing Gpx and Trkpt indexes so that GPX are sorted by datetime desc and Trkpt use their timestamp as indexes.

src/lib/ids.ts

@@ -1,4 +1,4 @@
-import route  from './docuri';
+import route from './docuri';
 
 const integerType = (n: number) => {
   return {
@@ -21,7 +21,7 @@ const coding = {
   rtept: integerType(6),
   trk: integerType(6),
   trkseg: integerType(6),
-  trkpt: integerType(6),
+  trkpt: integerType(16),
 };
 
 const routes = {
@@ -47,5 +47,9 @@ export default uri;
 
 const minDate = -8640000000000000;
 const halfMinDate = minDate / 2;
+const maxDate = 8640000000000000;
+const halfMaxDate = maxDate / 2;
 
-export const intToGpxId = (i: number) => Math.round(i / 2) - halfMinDate;
+export const intToGpxId = (i: number) => halfMaxDate - Math.round(i / 2);
+
+export const intToTrkptId = (i: number) => Math.round(i / 2) - halfMinDate;