Simple script example to create a GeoJSON of your Trainline trips using Raildar.

trainline-data-to-geojson.js

// npm install request request-promise
// ./data.json is Trainline Europe data export (ask the support)
// node trainline-data-to-geojson.js > trips.geojson

const fs = require('fs');
const rp = require('request-promise');

const computeGeojson = async () => {
  const data = JSON.parse(fs.readFileSync('./data.json'), { encoding: 'utf8' });
  const legs = data.pnrs.filter(pnr => pnr.status === 'emitted').map(pnr => pnr.legs.map(leg => ({
    dep: leg.departure.public_id,
    arr: leg.arrival.public_id,
    trip: `${leg.departure.name} ❯ ${leg.arrival.name}`,
    date: leg.departure_date,
  }))).flat();

  // const legsFiltered = legs.slice(0, 20);
  const legsFiltered = legs;
  const features = [];
  let i = 0;
  for (const leg of legsFiltered) {
    if (i++ % 10 == 0) {
      process.stderr.write(`Processing ${i}/${legsFiltered.length}\n`);
    }
    const { dep, arr, ...properties } = leg;

    try {
      const feature = await rp(`https://trainmap.ntag.fr/api/route?simplify=1&dep=${dep}&arr=${arr}`, { json: true, timeout: 10000 });
      feature.properties = properties;
      features.push(feature);
    } catch (e) {
      process.stderr.write(`Error with ${dep} ❯ ${arr} (${properties.trip}): ${e}\n`);
    }
  }

  const geojson = {
    "type": "FeatureCollection",
    features,
  };

  return JSON.stringify(geojson);
};

computeGeojson().then(console.log);