First version with a GPX export (#9) that works in a browser but, unfortunately, doesn't wotk on Adroid !

src/db/gpx.ts

@@ -3,7 +3,7 @@ import {
   string_to_bytes,
   bytes_to_base64,
 } from '@openpgp/asmcrypto.js';
-import { documentSharp } from 'ionicons/icons';
+import GPX from '../lib/gpx-parser-builder';
 
 export const pushGpx = async (db: any, payload: any) => {
   const gpxString = JSON.stringify(payload.gpx);
@@ -170,3 +170,27 @@ export const deleteCurrent = async (db: any) => {
     await deleteGps(db, docs[i]);
   }
 };
+
+export const getGpx = async (db: any, gpxId: string) => {
+  var gpxResult = await db.get(gpxId);
+  var gpx = gpxResult.gpx;
+  var trkptResults = await db.find({
+    selector: {
+      type: 'trkpt',
+      gpx: gpx._id,
+    },
+  });
+  var trkpts = trkptResults.docs;
+  trkpts.sort((first: any, second: any) =>
+    first.trkpt.time.localeCompare(second.trkpt.time)
+  );
+  trkpts.map((trkptDoc: any) => {
+    gpx.trk[0].trkseg[0].trkpt.push(trkptDoc.trkpt);
+  });
+  return gpx;
+};
+
+export const getGpxAsXmlString = async (db: any, gpxId: string) => {
+  const gpx = new GPX(await getGpx(db, gpxId));
+  return gpx.toString({});
+};